path: root/0012-Backport-LoongArch-improve-the-support-for-compiler-rt-and-bugfix.patch

From 0bce68310dc0ff6a09ec2cf5c3ae32400c631324 Mon Sep 17 00:00:00 2001
From: zhanglimin <zhanglimin@loongson.cn>
Date: Tue, 12 Sep 2023 09:51:16 +0800
Subject: [PATCH 01/14] [sanitizer][msan] VarArgHelper for loongarch64

This patch adds support for variadic argument for loongarch64,
which is based on MIPS64. And `check-msan` all pass.

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D158587

(cherry picked from commit ec42c78cc43ac1e8364e5a0941aa5fc91b813dd3)
---
 .../Instrumentation/MemorySanitizer.cpp       |  7 ++
 .../LoongArch/vararg-loongarch64.ll           | 78 +++++++++++++++++++
 2 files changed, 85 insertions(+)
 create mode 100644 llvm/test/Instrumentation/MemorySanitizer/LoongArch/vararg-loongarch64.ll

diff --git a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
index 83d90049abc3..362fd6e4151f 100644
--- a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
@@ -4945,6 +4945,7 @@ struct VarArgAMD64Helper : public VarArgHelper {
 };
 
 /// MIPS64-specific implementation of VarArgHelper.
+/// NOTE: This is also used for LoongArch64.
 struct VarArgMIPS64Helper : public VarArgHelper {
   Function &F;
   MemorySanitizer &MS;
@@ -5836,6 +5837,10 @@ struct VarArgSystemZHelper : public VarArgHelper {
   }
 };
 
+// Loongarch64 is not a MIPS, but the current vargs calling convention matches
+// the MIPS.
+using VarArgLoongArch64Helper = VarArgMIPS64Helper;
+
 /// A no-op implementation of VarArgHelper.
 struct VarArgNoOpHelper : public VarArgHelper {
   VarArgNoOpHelper(Function &F, MemorySanitizer &MS,
@@ -5868,6 +5873,8 @@ static VarArgHelper *CreateVarArgHelper(Function &Func, MemorySanitizer &Msan,
     return new VarArgPowerPC64Helper(Func, Msan, Visitor);
   else if (TargetTriple.getArch() == Triple::systemz)
     return new VarArgSystemZHelper(Func, Msan, Visitor);
+  else if (TargetTriple.isLoongArch64())
+    return new VarArgLoongArch64Helper(Func, Msan, Visitor);
   else
     return new VarArgNoOpHelper(Func, Msan, Visitor);
 }
diff --git a/llvm/test/Instrumentation/MemorySanitizer/LoongArch/vararg-loongarch64.ll b/llvm/test/Instrumentation/MemorySanitizer/LoongArch/vararg-loongarch64.ll
new file mode 100644
index 000000000000..8a4ab59588ad
--- /dev/null
+++ b/llvm/test/Instrumentation/MemorySanitizer/LoongArch/vararg-loongarch64.ll
@@ -0,0 +1,78 @@
+; RUN: opt < %s -S -passes=msan 2>&1 | FileCheck %s
+
+target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n64-S128"
+target triple = "loongarch64-unknown-linux-gnu"
+
+;; First, check allocation of the save area.
+declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #1
+declare void @llvm.va_start(ptr) #2
+declare void @llvm.va_end(ptr) #2
+declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #1
+define i32 @foo(i32 %guard, ...) {
+; CHECK-LABEL: @foo
+; CHECK:    [[TMP1:%.*]] = load {{.*}} @__msan_va_arg_overflow_size_tls
+; CHECK:    [[TMP2:%.*]] = add i64 0, [[TMP1]]
+; CHECK:    [[TMP3:%.*]] = alloca {{.*}} [[TMP2]]
+; CHECK:    call void @llvm.memset.p0.i64(ptr align 8 [[TMP3]], i8 0, i64 [[TMP2]], i1 false)
+; CHECK:    [[TMP4:%.*]] = call i64 @llvm.umin.i64(i64 [[TMP2]], i64 800)
+; CHECK:    call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[TMP3]], ptr align 8 @__msan_va_arg_tls, i64 [[TMP4]], i1 false)
+;
+  %vl = alloca ptr, align 8
+  call void @llvm.lifetime.start.p0(i64 32, ptr %vl)
+  call void @llvm.va_start(ptr %vl)
+  call void @llvm.va_end(ptr %vl)
+  call void @llvm.lifetime.end.p0(i64 32, ptr %vl)
+  ret i32 0
+}
+
+;; Save the incoming shadow value from the arguments in the __msan_va_arg_tls
+;; array.
+define i32 @bar() {
+; CHECK-LABEL: @bar
+; CHECK:    store i32 0, ptr @__msan_va_arg_tls, align 8
+; CHECK:    store i64 0, ptr inttoptr (i64 add (i64 ptrtoint (ptr @__msan_va_arg_tls to i64), i64 8) to ptr), align 8
+; CHECK:    store i64 0, ptr inttoptr (i64 add (i64 ptrtoint (ptr @__msan_va_arg_tls to i64), i64 16) to ptr), align 8
+; CHECK:    store {{.*}} 24, {{.*}} @__msan_va_arg_overflow_size_tls
+;
+  %1 = call i32 (i32, ...) @foo(i32 0, i32 1, i64 2, double 3.000000e+00)
+  ret i32 %1
+}
+
+;; Check multiple fixed arguments.
+declare i32 @foo2(i32 %g1, i32 %g2, ...)
+define i32 @bar2() {
+; CHECK-LABEL: @bar2
+; CHECK:    store i64 0, ptr @__msan_va_arg_tls, align 8
+; CHECK:    store i64 0, ptr inttoptr (i64 add (i64 ptrtoint (ptr @__msan_va_arg_tls to i64), i64 8) to ptr), align 8
+; CHECK:    store {{.*}} 16, {{.*}} @__msan_va_arg_overflow_size_tls
+;
+  %1 = call i32 (i32, i32, ...) @foo2(i32 0, i32 1, i64 2, double 3.000000e+00)
+  ret i32 %1
+}
+
+;; Test that MSan doesn't generate code overflowing __msan_va_arg_tls when too many arguments are
+;; passed to a variadic function.
+declare i64 @sum(i64 %n, ...)
+define dso_local i64 @many_args() {
+;; If the size of __msan_va_arg_tls changes the second argument of `add` must also be changed.
+; CHECK-LABEL: @many_args
+; CHECK:    i64 add (i64 ptrtoint (ptr @__msan_va_arg_tls to i64), i64 792)
+; CHECK-NOT: i64 add (i64 ptrtoint (ptr @__msan_va_arg_tls to i64), i64 800)
+;
+entry:
+  %ret = call i64 (i64, ...) @sum(i64 120,
+  i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
+  i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
+  i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
+  i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
+  i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
+  i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
+  i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
+  i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
+  i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
+  i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
+  i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
+  i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1
+  )
+  ret i64 %ret
+}
-- 
2.20.1


From f1265a12fa947b79967552ab520f904486c76353 Mon Sep 17 00:00:00 2001
From: Ami-zhang <96056515+Ami-zhang@users.noreply.github.com>
Date: Thu, 28 Sep 2023 15:26:18 +0800
Subject: [PATCH 02/14] [LowerTypeTests] Add loongarch64 to CFI jumptables
 (#67312)

This patch implements jump tables for loongarch64.

(cherry picked from commit 0e8a8c85f8765c086c573f36e60c895920381e18)
---
 llvm/lib/Transforms/IPO/LowerTypeTests.cpp           | 9 ++++++++-
 llvm/test/Transforms/LowerTypeTests/function-weak.ll | 2 ++
 llvm/test/Transforms/LowerTypeTests/function.ll      | 9 +++++++++
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Transforms/IPO/LowerTypeTests.cpp b/llvm/lib/Transforms/IPO/LowerTypeTests.cpp
index 9b4b3efd7283..a89d57d12615 100644
--- a/llvm/lib/Transforms/IPO/LowerTypeTests.cpp
+++ b/llvm/lib/Transforms/IPO/LowerTypeTests.cpp
@@ -1196,6 +1196,7 @@ static const unsigned kARMJumpTableEntrySize = 4;
 static const unsigned kARMBTIJumpTableEntrySize = 8;
 static const unsigned kARMv6MJumpTableEntrySize = 16;
 static const unsigned kRISCVJumpTableEntrySize = 8;
+static const unsigned kLOONGARCH64JumpTableEntrySize = 8;
 
 unsigned LowerTypeTestsModule::getJumpTableEntrySize() {
   switch (JumpTableArch) {
@@ -1222,6 +1223,8 @@ unsigned LowerTypeTestsModule::getJumpTableEntrySize() {
   case Triple::riscv32:
   case Triple::riscv64:
     return kRISCVJumpTableEntrySize;
+  case Triple::loongarch64:
+    return kLOONGARCH64JumpTableEntrySize;
   default:
     report_fatal_error("Unsupported architecture for jump tables");
   }
@@ -1286,6 +1289,9 @@ void LowerTypeTestsModule::createJumpTableEntry(
   } else if (JumpTableArch == Triple::riscv32 ||
              JumpTableArch == Triple::riscv64) {
     AsmOS << "tail $" << ArgIndex << "@plt\n";
+  } else if (JumpTableArch == Triple::loongarch64) {
+    AsmOS << "pcalau12i $$t0, %pc_hi20($" << ArgIndex << ")\n"
+          << "jirl $$r0, $$t0, %pc_lo12($" << ArgIndex << ")\n";
   } else {
     report_fatal_error("Unsupported architecture for jump tables");
   }
@@ -1304,7 +1310,8 @@ void LowerTypeTestsModule::buildBitSetsFromFunctions(
     ArrayRef<Metadata *> TypeIds, ArrayRef<GlobalTypeMember *> Functions) {
   if (Arch == Triple::x86 || Arch == Triple::x86_64 || Arch == Triple::arm ||
       Arch == Triple::thumb || Arch == Triple::aarch64 ||
-      Arch == Triple::riscv32 || Arch == Triple::riscv64)
+      Arch == Triple::riscv32 || Arch == Triple::riscv64 ||
+      Arch == Triple::loongarch64)
     buildBitSetsFromFunctionsNative(TypeIds, Functions);
   else if (Arch == Triple::wasm32 || Arch == Triple::wasm64)
     buildBitSetsFromFunctionsWASM(TypeIds, Functions);
diff --git a/llvm/test/Transforms/LowerTypeTests/function-weak.ll b/llvm/test/Transforms/LowerTypeTests/function-weak.ll
index ff69abacc8e9..c765937f1991 100644
--- a/llvm/test/Transforms/LowerTypeTests/function-weak.ll
+++ b/llvm/test/Transforms/LowerTypeTests/function-weak.ll
@@ -4,6 +4,7 @@
 ; RUN: opt -S -passes=lowertypetests -mtriple=aarch64-unknown-linux-gnu %s | FileCheck --check-prefixes=CHECK,ARM %s
 ; RUN: opt -S -passes=lowertypetests -mtriple=riscv32-unknown-linux-gnu %s | FileCheck --check-prefixes=CHECK,RISCV %s
 ; RUN: opt -S -passes=lowertypetests -mtriple=riscv64-unknown-linux-gnu %s | FileCheck --check-prefixes=CHECK,RISCV %s
+; RUN: opt -S -passes=lowertypetests -mtriple=loongarch64-unknown-linux-gnu %s | FileCheck --check-prefixes=CHECK,LOONGARCH64 %s
 
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
@@ -116,6 +117,7 @@ define i1 @foo(ptr %p) {
 ; X86: define private void @[[JT]]() #{{.*}} align 8 {
 ; ARM: define private void @[[JT]]() #{{.*}} align 4 {
 ; RISCV: define private void @[[JT]]() #{{.*}} align 8 {
+; LOONGARCH64: define private void @[[JT]]() #{{.*}} align 8 {
 
 ; CHECK: define internal void @__cfi_global_var_init() section ".text.startup" {
 ; CHECK-NEXT: entry:
diff --git a/llvm/test/Transforms/LowerTypeTests/function.ll b/llvm/test/Transforms/LowerTypeTests/function.ll
index 968c9d434eb2..802b88d92977 100644
--- a/llvm/test/Transforms/LowerTypeTests/function.ll
+++ b/llvm/test/Transforms/LowerTypeTests/function.ll
@@ -5,6 +5,7 @@
 ; RUN: opt -S -passes=lowertypetests -mtriple=riscv32-unknown-linux-gnu %s | FileCheck --check-prefixes=RISCV,NATIVE %s
 ; RUN: opt -S -passes=lowertypetests -mtriple=riscv64-unknown-linux-gnu %s | FileCheck --check-prefixes=RISCV,NATIVE %s
 ; RUN: opt -S -passes=lowertypetests -mtriple=wasm32-unknown-unknown %s | FileCheck --check-prefix=WASM32 %s
+; RUN: opt -S -passes=lowertypetests -mtriple=loongarch64-unknown-linux-gnu %s | FileCheck --check-prefixes=LOONGARCH64,NATIVE %s
 
 ; The right format for Arm jump tables depends on the selected
 ; subtarget, so we can't get these tests right without the Arm target
@@ -34,6 +35,7 @@ target datalayout = "e-p:64:64"
 ; THUMB: @g = internal alias void (), getelementptr inbounds ([2 x [4 x i8]], ptr @[[JT]], i64 0, i64 1)
 ; THUMBV6M: @g = internal alias void (), getelementptr inbounds ([2 x [16 x i8]], ptr @[[JT]], i64 0, i64 1)
 ; RISCV: @g = internal alias void (), getelementptr inbounds ([2 x [8 x i8]], ptr @[[JT]], i64 0, i64 1)
+; LOONGARCH64: @g = internal alias void (), getelementptr inbounds ([2 x [8 x i8]], ptr @[[JT]], i64 0, i64 1)
 
 ; NATIVE: define hidden void @f.cfi()
 ; WASM32: define void @f() !type !{{[0-9]+}} !wasm.index ![[I0:[0-9]+]]
@@ -65,6 +67,7 @@ define i1 @foo(ptr %p) {
 ; THUMB:       define private void @[[JT]]() #[[ATTR:.*]] align 4 {
 ; THUMBV6M:    define private void @[[JT]]() #[[ATTR:.*]] align 16 {
 ; RISCV:       define private void @[[JT]]() #[[ATTR:.*]] align 8 {
+; LOONGARCH64: define private void @[[JT]]() #[[ATTR:.*]] align 8 {
 
 ; X86:      jmp ${0:c}@plt
 ; X86-SAME: int3
@@ -99,6 +102,11 @@ define i1 @foo(ptr %p) {
 ; RISCV:      tail $0@plt
 ; RISCV-SAME: tail $1@plt
 
+; LOONGARCH64:      pcalau12i $$t0, %pc_hi20($0)
+; LOONGARCH64-SAME: jirl $$r0, $$t0, %pc_lo12($0)
+; LOONGARCH64-SAME: pcalau12i $$t0, %pc_hi20($1)
+; LOONGARCH64-SAME: jirl $$r0, $$t0, %pc_lo12($1)
+
 ; NATIVE-SAME: "s,s"(ptr @f.cfi, ptr @g.cfi)
 
 ; X86-LINUX: attributes #[[ATTR]] = { naked nocf_check nounwind }
@@ -107,6 +115,7 @@ define i1 @foo(ptr %p) {
 ; THUMB: attributes #[[ATTR]] = { naked nounwind "target-cpu"="cortex-a8" "target-features"="+thumb-mode" }
 ; THUMBV6M: attributes #[[ATTR]] = { naked nounwind "target-features"="+thumb-mode" }
 ; RISCV: attributes #[[ATTR]] = { naked nounwind "target-features"="-c,-relax" }
+; LOONGARCH64: attributes #[[ATTR]] = { naked nounwind }
 
 ; WASM32: ![[I0]] = !{i64 1}
 ; WASM32: ![[I1]] = !{i64 2}
-- 
2.20.1


From 6f3143e1ad0bb759b7519af81994ed3c71dcf52b Mon Sep 17 00:00:00 2001
From: wanglei <wanglei@loongson.cn>
Date: Fri, 20 Oct 2023 10:44:55 +0800
Subject: [PATCH 03/14] [LoongArch] Fix td pattern for CACOP LDPTE and LDDIR

The immediate argument should be a target constant (`timm`).

(cherry picked from commit 47826b3f148996767ebd2c67ee41c329cb364fef)
---
 llvm/lib/Target/LoongArch/LoongArchInstrInfo.td | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
index b2c4bb812ba5..166379d7d592 100644
--- a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
+++ b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
@@ -1857,9 +1857,9 @@ defm : PseudoBinPat<"atomic_load_xor_32", PseudoAtomicLoadXor32>;
 /// Intrinsics
 
 def : Pat<(int_loongarch_cacop_d timm:$op, i64:$rj, timm:$imm12),
-          (CACOP uimm5:$op, GPR:$rj, simm12:$imm12)>;
+          (CACOP timm:$op, GPR:$rj, timm:$imm12)>;
 def : Pat<(int_loongarch_cacop_w i32:$op, i32:$rj, i32:$imm12),
-          (CACOP uimm5:$op, GPR:$rj, simm12:$imm12)>;
+          (CACOP timm:$op, GPR:$rj, timm:$imm12)>;
 def : Pat<(loongarch_dbar uimm15:$imm15), (DBAR uimm15:$imm15)>;
 def : Pat<(loongarch_ibar uimm15:$imm15), (IBAR uimm15:$imm15)>;
 def : Pat<(loongarch_break uimm15:$imm15), (BREAK uimm15:$imm15)>;
@@ -2023,9 +2023,9 @@ def : Pat<(int_loongarch_asrtle_d GPR:$rj, GPR:$rk),
 def : Pat<(int_loongarch_asrtgt_d GPR:$rj, GPR:$rk),
           (ASRTGT_D GPR:$rj, GPR:$rk)>;
 def : Pat<(int_loongarch_lddir_d GPR:$rj, timm:$imm8),
-          (LDDIR GPR:$rj, uimm8:$imm8)>;
+          (LDDIR GPR:$rj, timm:$imm8)>;
 def : Pat<(int_loongarch_ldpte_d GPR:$rj, timm:$imm8),
-          (LDPTE GPR:$rj, uimm8:$imm8)>;
+          (LDPTE GPR:$rj, timm:$imm8)>;
 } // Predicates = [IsLA64]
 
 //===----------------------------------------------------------------------===//
-- 
2.20.1


From d90b85e94180543fd1789f9e26d7931f2329069b Mon Sep 17 00:00:00 2001
From: ZhaoQi <zhaoqi01@loongson.cn>
Date: Fri, 10 Nov 2023 15:54:33 +0800
Subject: [PATCH 04/14] [LoongArch][MC] Refine MCInstrAnalysis based on
 registers used (#71276)

MCInstrAnalysis can return properties of instructions (e.g., isCall(),
isBranch(),...) based on the informations that MCInstrDesc can get from
*InstrInfo*.td files. These infos are based on opcodes only, but JIRL
can have different properties based on different registers used.

So this patch refines several MCInstrAnalysis methods: isTerminator,
isCall,isReturn,isBranch,isUnconditionalBranch and isIndirectBranch.

This patch also allows BOLT which will be supported on LoongArch later
to get right instruction infos.

(cherry picked from commit f7d784709673ca185f6fb0633fd53c72e81f2ae1)
---
 .../MCTargetDesc/LoongArchMCTargetDesc.cpp    |  76 +++++++++++++
 .../unittests/Target/LoongArch/CMakeLists.txt |   1 +
 .../Target/LoongArch/MCInstrAnalysisTest.cpp  | 107 ++++++++++++++++++
 3 files changed, 184 insertions(+)
 create mode 100644 llvm/unittests/Target/LoongArch/MCInstrAnalysisTest.cpp

diff --git a/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCTargetDesc.cpp b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCTargetDesc.cpp
index 942e667bc261..d580c3457fec 100644
--- a/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCTargetDesc.cpp
+++ b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCTargetDesc.cpp
@@ -104,6 +104,82 @@ public:
 
     return false;
   }
+
+  bool isTerminator(const MCInst &Inst) const override {
+    if (MCInstrAnalysis::isTerminator(Inst))
+      return true;
+
+    switch (Inst.getOpcode()) {
+    default:
+      return false;
+    case LoongArch::JIRL:
+      return Inst.getOperand(0).getReg() == LoongArch::R0;
+    }
+  }
+
+  bool isCall(const MCInst &Inst) const override {
+    if (MCInstrAnalysis::isCall(Inst))
+      return true;
+
+    switch (Inst.getOpcode()) {
+    default:
+      return false;
+    case LoongArch::JIRL:
+      return Inst.getOperand(0).getReg() != LoongArch::R0;
+    }
+  }
+
+  bool isReturn(const MCInst &Inst) const override {
+    if (MCInstrAnalysis::isReturn(Inst))
+      return true;
+
+    switch (Inst.getOpcode()) {
+    default:
+      return false;
+    case LoongArch::JIRL:
+      return Inst.getOperand(0).getReg() == LoongArch::R0 &&
+             Inst.getOperand(1).getReg() == LoongArch::R1;
+    }
+  }
+
+  bool isBranch(const MCInst &Inst) const override {
+    if (MCInstrAnalysis::isBranch(Inst))
+      return true;
+
+    switch (Inst.getOpcode()) {
+    default:
+      return false;
+    case LoongArch::JIRL:
+      return Inst.getOperand(0).getReg() == LoongArch::R0 &&
+             Inst.getOperand(1).getReg() != LoongArch::R1;
+    }
+  }
+
+  bool isUnconditionalBranch(const MCInst &Inst) const override {
+    if (MCInstrAnalysis::isUnconditionalBranch(Inst))
+      return true;
+
+    switch (Inst.getOpcode()) {
+    default:
+      return false;
+    case LoongArch::JIRL:
+      return Inst.getOperand(0).getReg() == LoongArch::R0 &&
+             Inst.getOperand(1).getReg() != LoongArch::R1;
+    }
+  }
+
+  bool isIndirectBranch(const MCInst &Inst) const override {
+    if (MCInstrAnalysis::isIndirectBranch(Inst))
+      return true;
+
+    switch (Inst.getOpcode()) {
+    default:
+      return false;
+    case LoongArch::JIRL:
+      return Inst.getOperand(0).getReg() == LoongArch::R0 &&
+             Inst.getOperand(1).getReg() != LoongArch::R1;
+    }
+  }
 };
 
 } // end namespace
diff --git a/llvm/unittests/Target/LoongArch/CMakeLists.txt b/llvm/unittests/Target/LoongArch/CMakeLists.txt
index fef4f8e15461..e6f8ec073721 100644
--- a/llvm/unittests/Target/LoongArch/CMakeLists.txt
+++ b/llvm/unittests/Target/LoongArch/CMakeLists.txt
@@ -20,6 +20,7 @@ set(LLVM_LINK_COMPONENTS
 
 add_llvm_target_unittest(LoongArchTests
   InstSizes.cpp
+  MCInstrAnalysisTest.cpp
   )
 
 set_property(TARGET LoongArchTests PROPERTY FOLDER "Tests/UnitTests/TargetTests")
diff --git a/llvm/unittests/Target/LoongArch/MCInstrAnalysisTest.cpp b/llvm/unittests/Target/LoongArch/MCInstrAnalysisTest.cpp
new file mode 100644
index 000000000000..6a208d274a0d
--- /dev/null
+++ b/llvm/unittests/Target/LoongArch/MCInstrAnalysisTest.cpp
@@ -0,0 +1,107 @@
+//===- MCInstrAnalysisTest.cpp - LoongArchMCInstrAnalysis unit tests ------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCInstrAnalysis.h"
+#include "MCTargetDesc/LoongArchMCTargetDesc.h"
+#include "llvm/MC/MCInstBuilder.h"
+#include "llvm/MC/TargetRegistry.h"
+#include "llvm/Support/TargetSelect.h"
+
+#include "gtest/gtest.h"
+
+#include <memory>
+
+using namespace llvm;
+
+namespace {
+
+class InstrAnalysisTest : public testing::TestWithParam<const char *> {
+protected:
+  std::unique_ptr<const MCInstrInfo> Info;
+  std::unique_ptr<const MCInstrAnalysis> Analysis;
+
+  static void SetUpTestSuite() {
+    LLVMInitializeLoongArchTargetInfo();
+    LLVMInitializeLoongArchTarget();
+    LLVMInitializeLoongArchTargetMC();
+  }
+
+  InstrAnalysisTest() {
+    std::string Error;
+    const Target *TheTarget =
+        TargetRegistry::lookupTarget(Triple::normalize(GetParam()), Error);
+    Info = std::unique_ptr<const MCInstrInfo>(TheTarget->createMCInstrInfo());
+    Analysis = std::unique_ptr<const MCInstrAnalysis>(
+        TheTarget->createMCInstrAnalysis(Info.get()));
+  }
+};
+
+} // namespace
+
+static MCInst beq() {
+  return MCInstBuilder(LoongArch::BEQ)
+      .addReg(LoongArch::R0)
+      .addReg(LoongArch::R1)
+      .addImm(32);
+}
+
+static MCInst bl() { return MCInstBuilder(LoongArch::BL).addImm(32); }
+
+static MCInst jirl(unsigned RD, unsigned RJ = LoongArch::R10) {
+  return MCInstBuilder(LoongArch::JIRL).addReg(RD).addReg(RJ).addImm(16);
+}
+
+TEST_P(InstrAnalysisTest, IsTerminator) {
+  EXPECT_TRUE(Analysis->isTerminator(beq()));
+  EXPECT_FALSE(Analysis->isTerminator(bl()));
+  EXPECT_TRUE(Analysis->isTerminator(jirl(LoongArch::R0)));
+  EXPECT_FALSE(Analysis->isTerminator(jirl(LoongArch::R5)));
+}
+
+TEST_P(InstrAnalysisTest, IsCall) {
+  EXPECT_FALSE(Analysis->isCall(beq()));
+  EXPECT_TRUE(Analysis->isCall(bl()));
+  EXPECT_TRUE(Analysis->isCall(jirl(LoongArch::R1)));
+  EXPECT_FALSE(Analysis->isCall(jirl(LoongArch::R0)));
+}
+
+TEST_P(InstrAnalysisTest, IsReturn) {
+  EXPECT_FALSE(Analysis->isReturn(beq()));
+  EXPECT_FALSE(Analysis->isReturn(bl()));
+  EXPECT_TRUE(Analysis->isReturn(jirl(LoongArch::R0, LoongArch::R1)));
+  EXPECT_FALSE(Analysis->isReturn(jirl(LoongArch::R0)));
+  EXPECT_FALSE(Analysis->isReturn(jirl(LoongArch::R1)));
+}
+
+TEST_P(InstrAnalysisTest, IsBranch) {
+  EXPECT_TRUE(Analysis->isBranch(beq()));
+  EXPECT_FALSE(Analysis->isBranch(bl()));
+  EXPECT_TRUE(Analysis->isBranch(jirl(LoongArch::R0)));
+  EXPECT_FALSE(Analysis->isBranch(jirl(LoongArch::R1)));
+  EXPECT_FALSE(Analysis->isBranch(jirl(LoongArch::R0, LoongArch::R1)));
+}
+
+TEST_P(InstrAnalysisTest, IsUnconditionalBranch) {
+  EXPECT_FALSE(Analysis->isUnconditionalBranch(beq()));
+  EXPECT_FALSE(Analysis->isUnconditionalBranch(bl()));
+  EXPECT_TRUE(Analysis->isUnconditionalBranch(jirl(LoongArch::R0)));
+  EXPECT_FALSE(Analysis->isUnconditionalBranch(jirl(LoongArch::R1)));
+  EXPECT_FALSE(
+      Analysis->isUnconditionalBranch(jirl(LoongArch::R0, LoongArch::R1)));
+}
+
+TEST_P(InstrAnalysisTest, IsIndirectBranch) {
+  EXPECT_FALSE(Analysis->isIndirectBranch(beq()));
+  EXPECT_FALSE(Analysis->isIndirectBranch(bl()));
+  EXPECT_TRUE(Analysis->isIndirectBranch(jirl(LoongArch::R0)));
+  EXPECT_FALSE(Analysis->isIndirectBranch(jirl(LoongArch::R1)));
+  EXPECT_FALSE(Analysis->isIndirectBranch(jirl(LoongArch::R0, LoongArch::R1)));
+}
+
+INSTANTIATE_TEST_SUITE_P(LA32And64, InstrAnalysisTest,
+                         testing::Values("loongarch32", "loongarch64"));
-- 
2.20.1


From 4d3ba0892d66b21f6a8a72f1d787e42a64be8867 Mon Sep 17 00:00:00 2001
From: ZhaoQi <zhaoqi01@loongson.cn>
Date: Wed, 15 Nov 2023 11:12:30 +0800
Subject: [PATCH 05/14] [LoongArch][NFC] Pre-commit MCInstrAnalysis tests for
 instruction 'b' (#71903)

The tests for 'b' which commented with FIXME are incorrect, the
following patch will fix it.

(cherry picked from commit f6c4bb07eaa94bcd5d02ba7a46850225b6ed50d4)
---
 .../Target/LoongArch/MCInstrAnalysisTest.cpp   | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/llvm/unittests/Target/LoongArch/MCInstrAnalysisTest.cpp b/llvm/unittests/Target/LoongArch/MCInstrAnalysisTest.cpp
index 6a208d274a0d..6e1919fc2261 100644
--- a/llvm/unittests/Target/LoongArch/MCInstrAnalysisTest.cpp
+++ b/llvm/unittests/Target/LoongArch/MCInstrAnalysisTest.cpp
@@ -50,6 +50,8 @@ static MCInst beq() {
       .addImm(32);
 }
 
+static MCInst b() { return MCInstBuilder(LoongArch::B).addImm(32); }
+
 static MCInst bl() { return MCInstBuilder(LoongArch::BL).addImm(32); }
 
 static MCInst jirl(unsigned RD, unsigned RJ = LoongArch::R10) {
@@ -58,6 +60,7 @@ static MCInst jirl(unsigned RD, unsigned RJ = LoongArch::R10) {
 
 TEST_P(InstrAnalysisTest, IsTerminator) {
   EXPECT_TRUE(Analysis->isTerminator(beq()));
+  EXPECT_TRUE(Analysis->isTerminator(b()));
   EXPECT_FALSE(Analysis->isTerminator(bl()));
   EXPECT_TRUE(Analysis->isTerminator(jirl(LoongArch::R0)));
   EXPECT_FALSE(Analysis->isTerminator(jirl(LoongArch::R5)));
@@ -65,6 +68,7 @@ TEST_P(InstrAnalysisTest, IsTerminator) {
 
 TEST_P(InstrAnalysisTest, IsCall) {
   EXPECT_FALSE(Analysis->isCall(beq()));
+  EXPECT_FALSE(Analysis->isCall(b()));
   EXPECT_TRUE(Analysis->isCall(bl()));
   EXPECT_TRUE(Analysis->isCall(jirl(LoongArch::R1)));
   EXPECT_FALSE(Analysis->isCall(jirl(LoongArch::R0)));
@@ -72,6 +76,7 @@ TEST_P(InstrAnalysisTest, IsCall) {
 
 TEST_P(InstrAnalysisTest, IsReturn) {
   EXPECT_FALSE(Analysis->isReturn(beq()));
+  EXPECT_FALSE(Analysis->isReturn(b()));
   EXPECT_FALSE(Analysis->isReturn(bl()));
   EXPECT_TRUE(Analysis->isReturn(jirl(LoongArch::R0, LoongArch::R1)));
   EXPECT_FALSE(Analysis->isReturn(jirl(LoongArch::R0)));
@@ -80,14 +85,26 @@ TEST_P(InstrAnalysisTest, IsReturn) {
 
 TEST_P(InstrAnalysisTest, IsBranch) {
   EXPECT_TRUE(Analysis->isBranch(beq()));
+  EXPECT_TRUE(Analysis->isBranch(b()));
   EXPECT_FALSE(Analysis->isBranch(bl()));
   EXPECT_TRUE(Analysis->isBranch(jirl(LoongArch::R0)));
   EXPECT_FALSE(Analysis->isBranch(jirl(LoongArch::R1)));
   EXPECT_FALSE(Analysis->isBranch(jirl(LoongArch::R0, LoongArch::R1)));
 }
 
+TEST_P(InstrAnalysisTest, IsConditionalBranch) {
+  EXPECT_TRUE(Analysis->isConditionalBranch(beq()));
+  // FIXME: Instr 'b' is not a ConditionalBranch, so the analysis here is
+  // wrong. The following patch will fix it.
+  EXPECT_TRUE(Analysis->isConditionalBranch(b()));
+  EXPECT_FALSE(Analysis->isConditionalBranch(bl()));
+}
+
 TEST_P(InstrAnalysisTest, IsUnconditionalBranch) {
   EXPECT_FALSE(Analysis->isUnconditionalBranch(beq()));
+  // FIXME: Instr 'b' is an UnconditionalBranch, so the analysis here is
+  // wrong. The following patch will fix it.
+  EXPECT_FALSE(Analysis->isUnconditionalBranch(b()));
   EXPECT_FALSE(Analysis->isUnconditionalBranch(bl()));
   EXPECT_TRUE(Analysis->isUnconditionalBranch(jirl(LoongArch::R0)));
   EXPECT_FALSE(Analysis->isUnconditionalBranch(jirl(LoongArch::R1)));
@@ -97,6 +114,7 @@ TEST_P(InstrAnalysisTest, IsUnconditionalBranch) {
 
 TEST_P(InstrAnalysisTest, IsIndirectBranch) {
   EXPECT_FALSE(Analysis->isIndirectBranch(beq()));
+  EXPECT_FALSE(Analysis->isIndirectBranch(b()));
   EXPECT_FALSE(Analysis->isIndirectBranch(bl()));
   EXPECT_TRUE(Analysis->isIndirectBranch(jirl(LoongArch::R0)));
   EXPECT_FALSE(Analysis->isIndirectBranch(jirl(LoongArch::R1)));
-- 
2.20.1


From 034d4087be71c54248fff1bf7eae66291671776a Mon Sep 17 00:00:00 2001
From: ZhaoQi <zhaoqi01@loongson.cn>
Date: Thu, 16 Nov 2023 14:01:58 +0800
Subject: [PATCH 06/14] [LoongArch] Set isBarrier to true for instruction 'b'
 (#72339)

Instr "b offs26" represent to an unconditional branch in LoongArch. Set
isBarrier to 1 in tablegen for it, so that MCInstrAnalysis can return
correctly.

Fixes https://github.com/llvm/llvm-project/pull/71903.

(cherry picked from commit 42a4d5e8cab1537515d92ed56d6e17b673ed352f)
---
 llvm/lib/Target/LoongArch/LoongArchInstrInfo.td         | 1 +
 llvm/unittests/Target/LoongArch/MCInstrAnalysisTest.cpp | 8 ++------
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
index 166379d7d592..05ae36a9781d 100644
--- a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
+++ b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
@@ -586,6 +586,7 @@ class Br_I26<bits<32> op>
     : FmtI26<op, (outs), (ins simm26_b:$imm26), "$imm26"> {
   let isBranch = 1;
   let isTerminator = 1;
+  let isBarrier = 1;
 }
 } // hasSideEffects = 0, mayLoad = 0, mayStore = 0
 
diff --git a/llvm/unittests/Target/LoongArch/MCInstrAnalysisTest.cpp b/llvm/unittests/Target/LoongArch/MCInstrAnalysisTest.cpp
index 6e1919fc2261..468ee79615d6 100644
--- a/llvm/unittests/Target/LoongArch/MCInstrAnalysisTest.cpp
+++ b/llvm/unittests/Target/LoongArch/MCInstrAnalysisTest.cpp
@@ -94,17 +94,13 @@ TEST_P(InstrAnalysisTest, IsBranch) {
 
 TEST_P(InstrAnalysisTest, IsConditionalBranch) {
   EXPECT_TRUE(Analysis->isConditionalBranch(beq()));
-  // FIXME: Instr 'b' is not a ConditionalBranch, so the analysis here is
-  // wrong. The following patch will fix it.
-  EXPECT_TRUE(Analysis->isConditionalBranch(b()));
+  EXPECT_FALSE(Analysis->isConditionalBranch(b()));
   EXPECT_FALSE(Analysis->isConditionalBranch(bl()));
 }
 
 TEST_P(InstrAnalysisTest, IsUnconditionalBranch) {
   EXPECT_FALSE(Analysis->isUnconditionalBranch(beq()));
-  // FIXME: Instr 'b' is an UnconditionalBranch, so the analysis here is
-  // wrong. The following patch will fix it.
-  EXPECT_FALSE(Analysis->isUnconditionalBranch(b()));
+  EXPECT_TRUE(Analysis->isUnconditionalBranch(b()));
   EXPECT_FALSE(Analysis->isUnconditionalBranch(bl()));
   EXPECT_TRUE(Analysis->isUnconditionalBranch(jirl(LoongArch::R0)));
   EXPECT_FALSE(Analysis->isUnconditionalBranch(jirl(LoongArch::R1)));
-- 
2.20.1


From 701109dc419b8d07cd5254268d848dee1278b9ad Mon Sep 17 00:00:00 2001
From: ZhaoQi <zhaoqi01@loongson.cn>
Date: Tue, 21 Nov 2023 08:34:52 +0800
Subject: [PATCH 07/14] [LoongArch][MC] Pre-commit tests for instr bl fixupkind
 testing (#72826)

This patch is used to test whether fixupkind for bl can be returned
correctly. When BL has target-flags(loongarch-call), there is no error.
But without this flag, an assertion error will appear. So the test is
just tagged as "Expectedly Failed" now until the following patch fix it.

(cherry picked from commit 2ca028ce7c6de5f1350440012355a65383b8729a)
---
 .../CodeGen/LoongArch/test_bl_fixupkind.mir   | 66 +++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 llvm/test/CodeGen/LoongArch/test_bl_fixupkind.mir

diff --git a/llvm/test/CodeGen/LoongArch/test_bl_fixupkind.mir b/llvm/test/CodeGen/LoongArch/test_bl_fixupkind.mir
new file mode 100644
index 000000000000..2c1d41be7711
--- /dev/null
+++ b/llvm/test/CodeGen/LoongArch/test_bl_fixupkind.mir
@@ -0,0 +1,66 @@
+## Tagged as "Expectedly Failed" until the following patch fix it
+# XFAIL: *
+# RUN: llc --mtriple=loongarch64 --filetype=obj %s -o - | \
+# RUN: llvm-objdump -d - | FileCheck %s
+
+# REQUIRES: asserts
+
+## Check that bl can get fixupkind correctly.
+## When BL has target-flags(loongarch-call), there is no error. But without
+## this flag, an assertion error will appear:
+## Assertion `FixupKind != LoongArch::fixup_loongarch_invalid && "Unhandled expression!"' failed.
+
+--- |
+  target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n64-S128"
+  target triple = "loongarch64"
+  
+  define dso_local void @test_bl_fixupkind_with_flag() {
+  ; CHECK-LABEL: test_bl_fixupkind_with_flag
+  ; CHECK:         addi.d $sp, $sp, -16
+  ; CHECK-NEXT:    st.d $ra, $sp, 8
+  ; CHECK-NEXT:    bl 0 <test_bl_fixupkind_with_flag+0x8>
+  ; CHECK-NEXT:    ld.d $ra, $sp, 8
+  ; CHECK-NEXT:    addi.d $sp, $sp, 16
+  ; CHECK-NEXT:    ret
+  entry:
+    call void @foo()
+    ret void
+  }
+  
+  define dso_local void @test_bl_fixupkind_without_flag() {
+  ; CHECK-LABEL: test_bl_fixupkind_without_flag
+  ; CHECK:         addi.d $sp, $sp, -16
+  ; CHECK-NEXT:    st.d $ra, $sp, 8
+  ; CHECK-NEXT:    bl 0 <test_bl_fixupkind_without_flag+0x8>
+  ; CHECK-NEXT:    ld.d $ra, $sp, 8
+  ; CHECK-NEXT:    addi.d $sp, $sp, 16
+  ; CHECK-NEXT:    ret
+  entry:
+    call void @foo()
+    ret void
+  }
+  
+  declare dso_local void @foo(...)
+...
+---
+name:            test_bl_fixupkind_with_flag
+tracksRegLiveness: true
+body:             |
+  bb.0.entry:
+    ADJCALLSTACKDOWN 0, 0, implicit-def dead $r3, implicit $r3
+    BL target-flags(loongarch-call) @foo, csr_ilp32d_lp64d, implicit-def $r1, implicit-def dead $r1, implicit-def $r3
+    ADJCALLSTACKUP 0, 0, implicit-def dead $r3, implicit $r3
+    PseudoRET
+
+...
+---
+name:            test_bl_fixupkind_without_flag
+tracksRegLiveness: true
+body:             |
+  bb.0.entry:
+    ADJCALLSTACKDOWN 0, 0, implicit-def dead $r3, implicit $r3
+    BL @foo, csr_ilp32d_lp64d, implicit-def $r1, implicit-def dead $r1, implicit-def $r3
+    ADJCALLSTACKUP 0, 0, implicit-def dead $r3, implicit $r3
+    PseudoRET
+
+...
-- 
2.20.1


From a5bf03107b8738b0fab521d7718bed863056134b Mon Sep 17 00:00:00 2001
From: ZhaoQi <zhaoqi01@loongson.cn>
Date: Tue, 21 Nov 2023 19:00:29 +0800
Subject: [PATCH 08/14] [LoongArch][MC] Support to get the FixupKind for BL
 (#72938)

Previously, bolt could not get FixupKind for BL correctly, because bolt
cannot get target-flags for BL. Here just add support in MCCodeEmitter.

Fixes https://github.com/llvm/llvm-project/pull/72826.

(cherry picked from commit 775d2f3201cf7fb657aaf58d1b37c130bd9eb8f9)
---
 .../LoongArch/MCTargetDesc/LoongArchMCCodeEmitter.cpp     | 1 +
 llvm/test/CodeGen/LoongArch/test_bl_fixupkind.mir         | 8 ++------
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCCodeEmitter.cpp b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCCodeEmitter.cpp
index 08c0820cb862..09d92ac9aa3a 100644
--- a/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCCodeEmitter.cpp
+++ b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCCodeEmitter.cpp
@@ -263,6 +263,7 @@ LoongArchMCCodeEmitter::getExprOpValue(const MCInst &MI, const MCOperand &MO,
       FixupKind = LoongArch::fixup_loongarch_b21;
       break;
     case LoongArch::B:
+    case LoongArch::BL:
       FixupKind = LoongArch::fixup_loongarch_b26;
       break;
     }
diff --git a/llvm/test/CodeGen/LoongArch/test_bl_fixupkind.mir b/llvm/test/CodeGen/LoongArch/test_bl_fixupkind.mir
index 2c1d41be7711..70cd5fb8d7eb 100644
--- a/llvm/test/CodeGen/LoongArch/test_bl_fixupkind.mir
+++ b/llvm/test/CodeGen/LoongArch/test_bl_fixupkind.mir
@@ -1,14 +1,10 @@
-## Tagged as "Expectedly Failed" until the following patch fix it
-# XFAIL: *
 # RUN: llc --mtriple=loongarch64 --filetype=obj %s -o - | \
 # RUN: llvm-objdump -d - | FileCheck %s
 
 # REQUIRES: asserts
 
-## Check that bl can get fixupkind correctly.
-## When BL has target-flags(loongarch-call), there is no error. But without
-## this flag, an assertion error will appear:
-## Assertion `FixupKind != LoongArch::fixup_loongarch_invalid && "Unhandled expression!"' failed.
+## Check that bl can get fixupkind correctly, whether BL contains
+## target-flags(loongarch-call) or not.
 
 --- |
   target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n64-S128"
-- 
2.20.1


From 20421e57af53d963a95c6c318f71f9399d241188 Mon Sep 17 00:00:00 2001
From: ZhaoQi <zhaoqi01@loongson.cn>
Date: Thu, 23 Nov 2023 16:38:41 +0800
Subject: [PATCH 09/14] [LoongArch][MC] Modify branch evaluation for
 MCInstrAnalysis (#73205)

Function evaluateBranch() is used to compute target address for a given
branch instruction and return true on success. But target address of
indirect branch cannot be simply added, so rule it out and just return
false.

This patch also add objdump tests which capture the current state of
support for printing branch targets. Without this patch, the result of
"jirl $zero, $a0, 4" is "jirl $zero, $a0, 4 <foo+0x64>". It is obviously
incorrect, because this instruction represents an indirect branch whose
target address depends on both the register value and the imm. After
this patch, it will be right despite loss of details.

(cherry picked from commit 1c68c4c57a65a67963264878bc4646be8b58854c)
---
 .../MCTargetDesc/LoongArchMCTargetDesc.cpp    |  3 +-
 .../llvm-objdump/ELF/LoongArch/branches.s     | 76 +++++++++++++++++++
 .../llvm-objdump/ELF/LoongArch/lit.local.cfg  |  2 +
 3 files changed, 80 insertions(+), 1 deletion(-)
 create mode 100644 llvm/test/tools/llvm-objdump/ELF/LoongArch/branches.s
 create mode 100644 llvm/test/tools/llvm-objdump/ELF/LoongArch/lit.local.cfg

diff --git a/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCTargetDesc.cpp b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCTargetDesc.cpp
index d580c3457fec..a4e6a09863e6 100644
--- a/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCTargetDesc.cpp
+++ b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCTargetDesc.cpp
@@ -97,7 +97,8 @@ public:
   bool evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size,
                       uint64_t &Target) const override {
     unsigned NumOps = Inst.getNumOperands();
-    if (isBranch(Inst) || Inst.getOpcode() == LoongArch::BL) {
+    if ((isBranch(Inst) && !isIndirectBranch(Inst)) ||
+        Inst.getOpcode() == LoongArch::BL) {
       Target = Addr + Inst.getOperand(NumOps - 1).getImm();
       return true;
     }
diff --git a/llvm/test/tools/llvm-objdump/ELF/LoongArch/branches.s b/llvm/test/tools/llvm-objdump/ELF/LoongArch/branches.s
new file mode 100644
index 000000000000..8cb00aef9954
--- /dev/null
+++ b/llvm/test/tools/llvm-objdump/ELF/LoongArch/branches.s
@@ -0,0 +1,76 @@
+# RUN: llvm-mc --triple=loongarch32 --filetype=obj < %s | \
+# RUN:   llvm-objdump -d --no-show-raw-insn - | FileCheck %s
+# RUN: llvm-mc --triple=loongarch64 --filetype=obj < %s | \
+# RUN:   llvm-objdump -d --no-show-raw-insn - | FileCheck %s
+
+# CHECK-LABEL: <foo>:
+foo:
+# CHECK: beq $a0, $a1, 108 <foo+0x6c>
+beq $a0, $a1, .Llocal
+# CHECK: bne $a0, $a1, 104 <foo+0x6c>
+bne $a0, $a1, .Llocal
+# CHECK: blt $a0, $a1, 100 <foo+0x6c>
+blt $a0, $a1, .Llocal
+# CHECK: bltu $a0, $a1, 96 <foo+0x6c>
+bltu $a0, $a1, .Llocal
+# CHECK: bge $a0, $a1, 92 <foo+0x6c>
+bge $a0, $a1, .Llocal
+# CHECK: bgeu $a0, $a1, 88 <foo+0x6c>
+bgeu $a0, $a1, .Llocal
+# CHECK: beqz $a0, 84 <foo+0x6c>
+beqz $a0, .Llocal
+# CHECK: bnez $a0, 80 <foo+0x6c>
+bnez $a0, .Llocal
+# CHECK: bceqz $fcc6, 76 <foo+0x6c>
+bceqz $fcc6, .Llocal
+# CHECK: bcnez $fcc6, 72 <foo+0x6c>
+bcnez $fcc6, .Llocal
+
+# CHECK: beq $a0, $a1, 76 <bar>
+beq $a0, $a1, bar
+# CHECK: bne $a0, $a1, 72 <bar>
+bne $a0, $a1, bar
+# CHECK: blt $a0, $a1, 68 <bar>
+blt $a0, $a1, bar
+# CHECK: bltu $a0, $a1, 64 <bar>
+bltu $a0, $a1, bar
+# CHECK: bge $a0, $a1, 60 <bar>
+bge $a0, $a1, bar
+# CHECK: bgeu $a0, $a1, 56 <bar>
+bgeu $a0, $a1, bar
+# CHECK: beqz $a0, 52 <bar>
+beqz $a0, bar
+# CHECK: bnez $a0, 48 <bar>
+bnez $a0, bar
+# CHECK: bceqz $fcc6, 44 <bar>
+bceqz $fcc6, bar
+# CHECK: bcnez $fcc6, 40 <bar>
+bcnez $fcc6, bar
+
+# CHECK: b 28 <foo+0x6c>
+b .Llocal
+# CHECK: b 32 <bar>
+b bar
+
+# CHECK: bl 20 <foo+0x6c>
+bl .Llocal
+# CHECK: bl 24 <bar>
+bl bar
+
+# CHECK: jirl $zero, $a0, 4{{$}}
+jirl $zero, $a0, 4
+# CHECK: jirl $ra, $a0, 4{{$}}
+jirl $ra, $a0, 4
+# CHECK: ret
+ret
+
+.Llocal:
+# CHECK: 6c: nop
+# CHECK: nop
+nop
+nop
+
+# CHECK-LABEL: <bar>:
+bar:
+# CHECK: 74: nop
+nop
diff --git a/llvm/test/tools/llvm-objdump/ELF/LoongArch/lit.local.cfg b/llvm/test/tools/llvm-objdump/ELF/LoongArch/lit.local.cfg
new file mode 100644
index 000000000000..cc24278acbb4
--- /dev/null
+++ b/llvm/test/tools/llvm-objdump/ELF/LoongArch/lit.local.cfg
@@ -0,0 +1,2 @@
+if not "LoongArch" in config.root.targets:
+    config.unsupported = True
-- 
2.20.1


From 0fe85205a8637c6671f423cddd41b712085232ac Mon Sep 17 00:00:00 2001
From: hev <wangrui@loongson.cn>
Date: Thu, 23 Nov 2023 15:15:26 +0800
Subject: [PATCH 10/14] [LoongArch] Precommit a test for smul with overflow
 (NFC) (#73212)

(cherry picked from commit 7414c0db962f8a5029fd44c3e0bc93d9ce20be71)
---
 .../CodeGen/LoongArch/smul-with-overflow.ll   | 118 ++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 llvm/test/CodeGen/LoongArch/smul-with-overflow.ll

diff --git a/llvm/test/CodeGen/LoongArch/smul-with-overflow.ll b/llvm/test/CodeGen/LoongArch/smul-with-overflow.ll
new file mode 100644
index 000000000000..a53e77e5aa4b
--- /dev/null
+++ b/llvm/test/CodeGen/LoongArch/smul-with-overflow.ll
@@ -0,0 +1,118 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc --mtriple=loongarch32 < %s | FileCheck %s --check-prefix=LA32
+; RUN: llc --mtriple=loongarch64 < %s | FileCheck %s --check-prefix=LA64
+
+define zeroext i1 @smuloi64(i64 %v1, i64 %v2, ptr %res) {
+; LA32-LABEL: smuloi64:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $sp, $sp, -16
+; LA32-NEXT:    .cfi_def_cfa_offset 16
+; LA32-NEXT:    st.w $ra, $sp, 12 # 4-byte Folded Spill
+; LA32-NEXT:    st.w $fp, $sp, 8 # 4-byte Folded Spill
+; LA32-NEXT:    .cfi_offset 1, -4
+; LA32-NEXT:    .cfi_offset 22, -8
+; LA32-NEXT:    move $fp, $a4
+; LA32-NEXT:    st.w $zero, $sp, 4
+; LA32-NEXT:    addi.w $a4, $sp, 4
+; LA32-NEXT:    bl %plt(__mulodi4)
+; LA32-NEXT:    st.w $a1, $fp, 4
+; LA32-NEXT:    st.w $a0, $fp, 0
+; LA32-NEXT:    ld.w $a0, $sp, 4
+; LA32-NEXT:    sltu $a0, $zero, $a0
+; LA32-NEXT:    ld.w $fp, $sp, 8 # 4-byte Folded Reload
+; LA32-NEXT:    ld.w $ra, $sp, 12 # 4-byte Folded Reload
+; LA32-NEXT:    addi.w $sp, $sp, 16
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: smuloi64:
+; LA64:       # %bb.0:
+; LA64-NEXT:    mul.d $a3, $a0, $a1
+; LA64-NEXT:    st.d $a3, $a2, 0
+; LA64-NEXT:    mulh.d $a0, $a0, $a1
+; LA64-NEXT:    srai.d $a1, $a3, 63
+; LA64-NEXT:    xor $a0, $a0, $a1
+; LA64-NEXT:    sltu $a0, $zero, $a0
+; LA64-NEXT:    ret
+  %t = call {i64, i1} @llvm.smul.with.overflow.i64(i64 %v1, i64 %v2)
+  %val = extractvalue {i64, i1} %t, 0
+  %obit = extractvalue {i64, i1} %t, 1
+  store i64 %val, ptr %res
+  ret i1 %obit
+}
+
+define zeroext i1 @smuloi128(i128 %v1, i128 %v2, ptr %res) {
+; LA32-LABEL: smuloi128:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $sp, $sp, -64
+; LA32-NEXT:    .cfi_def_cfa_offset 64
+; LA32-NEXT:    st.w $ra, $sp, 60 # 4-byte Folded Spill
+; LA32-NEXT:    st.w $fp, $sp, 56 # 4-byte Folded Spill
+; LA32-NEXT:    .cfi_offset 1, -4
+; LA32-NEXT:    .cfi_offset 22, -8
+; LA32-NEXT:    move $fp, $a2
+; LA32-NEXT:    st.w $zero, $sp, 52
+; LA32-NEXT:    ld.w $a2, $a1, 12
+; LA32-NEXT:    st.w $a2, $sp, 12
+; LA32-NEXT:    ld.w $a2, $a1, 8
+; LA32-NEXT:    st.w $a2, $sp, 8
+; LA32-NEXT:    ld.w $a2, $a1, 4
+; LA32-NEXT:    st.w $a2, $sp, 4
+; LA32-NEXT:    ld.w $a1, $a1, 0
+; LA32-NEXT:    st.w $a1, $sp, 0
+; LA32-NEXT:    ld.w $a1, $a0, 12
+; LA32-NEXT:    st.w $a1, $sp, 28
+; LA32-NEXT:    ld.w $a1, $a0, 8
+; LA32-NEXT:    st.w $a1, $sp, 24
+; LA32-NEXT:    ld.w $a1, $a0, 4
+; LA32-NEXT:    st.w $a1, $sp, 20
+; LA32-NEXT:    ld.w $a0, $a0, 0
+; LA32-NEXT:    st.w $a0, $sp, 16
+; LA32-NEXT:    addi.w $a0, $sp, 32
+; LA32-NEXT:    addi.w $a1, $sp, 16
+; LA32-NEXT:    addi.w $a2, $sp, 0
+; LA32-NEXT:    addi.w $a3, $sp, 52
+; LA32-NEXT:    bl %plt(__muloti4)
+; LA32-NEXT:    ld.w $a0, $sp, 44
+; LA32-NEXT:    st.w $a0, $fp, 12
+; LA32-NEXT:    ld.w $a0, $sp, 40
+; LA32-NEXT:    st.w $a0, $fp, 8
+; LA32-NEXT:    ld.w $a0, $sp, 36
+; LA32-NEXT:    st.w $a0, $fp, 4
+; LA32-NEXT:    ld.w $a0, $sp, 32
+; LA32-NEXT:    st.w $a0, $fp, 0
+; LA32-NEXT:    ld.w $a0, $sp, 52
+; LA32-NEXT:    sltu $a0, $zero, $a0
+; LA32-NEXT:    ld.w $fp, $sp, 56 # 4-byte Folded Reload
+; LA32-NEXT:    ld.w $ra, $sp, 60 # 4-byte Folded Reload
+; LA32-NEXT:    addi.w $sp, $sp, 64
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: smuloi128:
+; LA64:       # %bb.0:
+; LA64-NEXT:    addi.d $sp, $sp, -32
+; LA64-NEXT:    .cfi_def_cfa_offset 32
+; LA64-NEXT:    st.d $ra, $sp, 24 # 8-byte Folded Spill
+; LA64-NEXT:    st.d $fp, $sp, 16 # 8-byte Folded Spill
+; LA64-NEXT:    .cfi_offset 1, -8
+; LA64-NEXT:    .cfi_offset 22, -16
+; LA64-NEXT:    move $fp, $a4
+; LA64-NEXT:    st.d $zero, $sp, 8
+; LA64-NEXT:    addi.d $a4, $sp, 8
+; LA64-NEXT:    bl %plt(__muloti4)
+; LA64-NEXT:    st.d $a1, $fp, 8
+; LA64-NEXT:    st.d $a0, $fp, 0
+; LA64-NEXT:    ld.d $a0, $sp, 8
+; LA64-NEXT:    sltu $a0, $zero, $a0
+; LA64-NEXT:    ld.d $fp, $sp, 16 # 8-byte Folded Reload
+; LA64-NEXT:    ld.d $ra, $sp, 24 # 8-byte Folded Reload
+; LA64-NEXT:    addi.d $sp, $sp, 32
+; LA64-NEXT:    ret
+  %t = call {i128, i1} @llvm.smul.with.overflow.i128(i128 %v1, i128 %v2)
+  %val = extractvalue {i128, i1} %t, 0
+  %obit = extractvalue {i128, i1} %t, 1
+  store i128 %val, ptr %res
+  ret i1 %obit
+}
+
+declare {i64, i1} @llvm.smul.with.overflow.i64(i64, i64) nounwind readnone
+declare {i128, i1} @llvm.smul.with.overflow.i128(i128, i128) nounwind readnone
-- 
2.20.1


From e29ff285726046ec46c9005c67ba992e3efc8ace Mon Sep 17 00:00:00 2001
From: hev <wangrui@loongson.cn>
Date: Thu, 23 Nov 2023 19:34:50 +0800
Subject: [PATCH 11/14] [LoongArch] Disable mulodi4 and muloti4 libcalls
 (#73199)

This library function only exists in compiler-rt not libgcc. So this
would fail to link unless we were linking with compiler-rt.

Fixes https://github.com/ClangBuiltLinux/linux/issues/1958

(cherry picked from commit 0d9f557b6c36da3aa92daff4c0d37ea821d7ae1e)
---
 .../LoongArch/LoongArchISelLowering.cpp       |   5 +
 .../CodeGen/LoongArch/smul-with-overflow.ll   | 463 +++++++++++++++---
 2 files changed, 397 insertions(+), 71 deletions(-)

diff --git a/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp b/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
index f7eacd56c542..ed106cb766bc 100644
--- a/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
+++ b/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
@@ -152,8 +152,13 @@ LoongArchTargetLowering::LoongArchTargetLowering(const TargetMachine &TM,
 
     // Set libcalls.
     setLibcallName(RTLIB::MUL_I128, nullptr);
+    // The MULO libcall is not part of libgcc, only compiler-rt.
+    setLibcallName(RTLIB::MULO_I64, nullptr);
   }
 
+  // The MULO libcall is not part of libgcc, only compiler-rt.
+  setLibcallName(RTLIB::MULO_I128, nullptr);
+
   static const ISD::CondCode FPCCToExpand[] = {
       ISD::SETOGT, ISD::SETOGE, ISD::SETUGT, ISD::SETUGE,
       ISD::SETGE,  ISD::SETNE,  ISD::SETGT};
diff --git a/llvm/test/CodeGen/LoongArch/smul-with-overflow.ll b/llvm/test/CodeGen/LoongArch/smul-with-overflow.ll
index a53e77e5aa4b..6cba4108d63c 100644
--- a/llvm/test/CodeGen/LoongArch/smul-with-overflow.ll
+++ b/llvm/test/CodeGen/LoongArch/smul-with-overflow.ll
@@ -5,23 +5,53 @@
 define zeroext i1 @smuloi64(i64 %v1, i64 %v2, ptr %res) {
 ; LA32-LABEL: smuloi64:
 ; LA32:       # %bb.0:
-; LA32-NEXT:    addi.w $sp, $sp, -16
-; LA32-NEXT:    .cfi_def_cfa_offset 16
-; LA32-NEXT:    st.w $ra, $sp, 12 # 4-byte Folded Spill
-; LA32-NEXT:    st.w $fp, $sp, 8 # 4-byte Folded Spill
-; LA32-NEXT:    .cfi_offset 1, -4
-; LA32-NEXT:    .cfi_offset 22, -8
-; LA32-NEXT:    move $fp, $a4
-; LA32-NEXT:    st.w $zero, $sp, 4
-; LA32-NEXT:    addi.w $a4, $sp, 4
-; LA32-NEXT:    bl %plt(__mulodi4)
-; LA32-NEXT:    st.w $a1, $fp, 4
-; LA32-NEXT:    st.w $a0, $fp, 0
-; LA32-NEXT:    ld.w $a0, $sp, 4
+; LA32-NEXT:    srai.w $a5, $a1, 31
+; LA32-NEXT:    mul.w $a6, $a2, $a5
+; LA32-NEXT:    mulh.wu $a7, $a2, $a5
+; LA32-NEXT:    add.w $a7, $a7, $a6
+; LA32-NEXT:    mul.w $a5, $a3, $a5
+; LA32-NEXT:    add.w $a5, $a7, $a5
+; LA32-NEXT:    srai.w $a7, $a3, 31
+; LA32-NEXT:    mul.w $t0, $a7, $a1
+; LA32-NEXT:    mulh.wu $t1, $a7, $a0
+; LA32-NEXT:    add.w $t0, $t1, $t0
+; LA32-NEXT:    mul.w $a7, $a7, $a0
+; LA32-NEXT:    add.w $t0, $t0, $a7
+; LA32-NEXT:    add.w $a5, $t0, $a5
+; LA32-NEXT:    mulh.wu $t0, $a0, $a2
+; LA32-NEXT:    mul.w $t1, $a1, $a2
+; LA32-NEXT:    add.w $t0, $t1, $t0
+; LA32-NEXT:    sltu $t1, $t0, $t1
+; LA32-NEXT:    mulh.wu $t2, $a1, $a2
+; LA32-NEXT:    add.w $t1, $t2, $t1
+; LA32-NEXT:    mul.w $t2, $a0, $a3
+; LA32-NEXT:    add.w $t0, $t2, $t0
+; LA32-NEXT:    sltu $t2, $t0, $t2
+; LA32-NEXT:    mulh.wu $t3, $a0, $a3
+; LA32-NEXT:    add.w $t2, $t3, $t2
+; LA32-NEXT:    add.w $a6, $a7, $a6
+; LA32-NEXT:    sltu $a7, $a6, $a7
+; LA32-NEXT:    add.w $a5, $a5, $a7
+; LA32-NEXT:    mul.w $a0, $a0, $a2
+; LA32-NEXT:    mul.w $a2, $a1, $a3
+; LA32-NEXT:    mulh.wu $a1, $a1, $a3
+; LA32-NEXT:    add.w $a3, $t1, $t2
+; LA32-NEXT:    sltu $a7, $a3, $t1
+; LA32-NEXT:    add.w $a1, $a1, $a7
+; LA32-NEXT:    st.w $a0, $a4, 0
+; LA32-NEXT:    add.w $a0, $a2, $a3
+; LA32-NEXT:    sltu $a2, $a0, $a2
+; LA32-NEXT:    add.w $a1, $a1, $a2
+; LA32-NEXT:    st.w $t0, $a4, 4
+; LA32-NEXT:    add.w $a1, $a1, $a5
+; LA32-NEXT:    add.w $a2, $a0, $a6
+; LA32-NEXT:    sltu $a0, $a2, $a0
+; LA32-NEXT:    add.w $a0, $a1, $a0
+; LA32-NEXT:    srai.w $a1, $t0, 31
+; LA32-NEXT:    xor $a0, $a0, $a1
+; LA32-NEXT:    xor $a1, $a2, $a1
+; LA32-NEXT:    or $a0, $a1, $a0
 ; LA32-NEXT:    sltu $a0, $zero, $a0
-; LA32-NEXT:    ld.w $fp, $sp, 8 # 4-byte Folded Reload
-; LA32-NEXT:    ld.w $ra, $sp, 12 # 4-byte Folded Reload
-; LA32-NEXT:    addi.w $sp, $sp, 16
 ; LA32-NEXT:    ret
 ;
 ; LA64-LABEL: smuloi64:
@@ -43,69 +73,360 @@ define zeroext i1 @smuloi64(i64 %v1, i64 %v2, ptr %res) {
 define zeroext i1 @smuloi128(i128 %v1, i128 %v2, ptr %res) {
 ; LA32-LABEL: smuloi128:
 ; LA32:       # %bb.0:
-; LA32-NEXT:    addi.w $sp, $sp, -64
-; LA32-NEXT:    .cfi_def_cfa_offset 64
-; LA32-NEXT:    st.w $ra, $sp, 60 # 4-byte Folded Spill
-; LA32-NEXT:    st.w $fp, $sp, 56 # 4-byte Folded Spill
+; LA32-NEXT:    addi.w $sp, $sp, -96
+; LA32-NEXT:    .cfi_def_cfa_offset 96
+; LA32-NEXT:    st.w $ra, $sp, 92 # 4-byte Folded Spill
+; LA32-NEXT:    st.w $fp, $sp, 88 # 4-byte Folded Spill
+; LA32-NEXT:    st.w $s0, $sp, 84 # 4-byte Folded Spill
+; LA32-NEXT:    st.w $s1, $sp, 80 # 4-byte Folded Spill
+; LA32-NEXT:    st.w $s2, $sp, 76 # 4-byte Folded Spill
+; LA32-NEXT:    st.w $s3, $sp, 72 # 4-byte Folded Spill
+; LA32-NEXT:    st.w $s4, $sp, 68 # 4-byte Folded Spill
+; LA32-NEXT:    st.w $s5, $sp, 64 # 4-byte Folded Spill
+; LA32-NEXT:    st.w $s6, $sp, 60 # 4-byte Folded Spill
+; LA32-NEXT:    st.w $s7, $sp, 56 # 4-byte Folded Spill
+; LA32-NEXT:    st.w $s8, $sp, 52 # 4-byte Folded Spill
 ; LA32-NEXT:    .cfi_offset 1, -4
 ; LA32-NEXT:    .cfi_offset 22, -8
-; LA32-NEXT:    move $fp, $a2
-; LA32-NEXT:    st.w $zero, $sp, 52
-; LA32-NEXT:    ld.w $a2, $a1, 12
-; LA32-NEXT:    st.w $a2, $sp, 12
-; LA32-NEXT:    ld.w $a2, $a1, 8
-; LA32-NEXT:    st.w $a2, $sp, 8
-; LA32-NEXT:    ld.w $a2, $a1, 4
-; LA32-NEXT:    st.w $a2, $sp, 4
-; LA32-NEXT:    ld.w $a1, $a1, 0
-; LA32-NEXT:    st.w $a1, $sp, 0
-; LA32-NEXT:    ld.w $a1, $a0, 12
-; LA32-NEXT:    st.w $a1, $sp, 28
-; LA32-NEXT:    ld.w $a1, $a0, 8
-; LA32-NEXT:    st.w $a1, $sp, 24
-; LA32-NEXT:    ld.w $a1, $a0, 4
-; LA32-NEXT:    st.w $a1, $sp, 20
-; LA32-NEXT:    ld.w $a0, $a0, 0
-; LA32-NEXT:    st.w $a0, $sp, 16
-; LA32-NEXT:    addi.w $a0, $sp, 32
-; LA32-NEXT:    addi.w $a1, $sp, 16
-; LA32-NEXT:    addi.w $a2, $sp, 0
-; LA32-NEXT:    addi.w $a3, $sp, 52
-; LA32-NEXT:    bl %plt(__muloti4)
-; LA32-NEXT:    ld.w $a0, $sp, 44
-; LA32-NEXT:    st.w $a0, $fp, 12
-; LA32-NEXT:    ld.w $a0, $sp, 40
-; LA32-NEXT:    st.w $a0, $fp, 8
-; LA32-NEXT:    ld.w $a0, $sp, 36
-; LA32-NEXT:    st.w $a0, $fp, 4
-; LA32-NEXT:    ld.w $a0, $sp, 32
-; LA32-NEXT:    st.w $a0, $fp, 0
-; LA32-NEXT:    ld.w $a0, $sp, 52
+; LA32-NEXT:    .cfi_offset 23, -12
+; LA32-NEXT:    .cfi_offset 24, -16
+; LA32-NEXT:    .cfi_offset 25, -20
+; LA32-NEXT:    .cfi_offset 26, -24
+; LA32-NEXT:    .cfi_offset 27, -28
+; LA32-NEXT:    .cfi_offset 28, -32
+; LA32-NEXT:    .cfi_offset 29, -36
+; LA32-NEXT:    .cfi_offset 30, -40
+; LA32-NEXT:    .cfi_offset 31, -44
+; LA32-NEXT:    st.w $a2, $sp, 12 # 4-byte Folded Spill
+; LA32-NEXT:    ld.w $a6, $a1, 0
+; LA32-NEXT:    ld.w $a7, $a0, 0
+; LA32-NEXT:    mulh.wu $a3, $a7, $a6
+; LA32-NEXT:    ld.w $a5, $a0, 4
+; LA32-NEXT:    mul.w $a4, $a5, $a6
+; LA32-NEXT:    add.w $a3, $a4, $a3
+; LA32-NEXT:    sltu $a4, $a3, $a4
+; LA32-NEXT:    mulh.wu $t0, $a5, $a6
+; LA32-NEXT:    add.w $a4, $t0, $a4
+; LA32-NEXT:    ld.w $t0, $a1, 4
+; LA32-NEXT:    mul.w $t1, $a7, $t0
+; LA32-NEXT:    add.w $a3, $t1, $a3
+; LA32-NEXT:    st.w $a3, $sp, 44 # 4-byte Folded Spill
+; LA32-NEXT:    sltu $t1, $a3, $t1
+; LA32-NEXT:    mulh.wu $t2, $a7, $t0
+; LA32-NEXT:    add.w $t1, $t2, $t1
+; LA32-NEXT:    ld.w $t4, $a0, 12
+; LA32-NEXT:    ld.w $t2, $a0, 8
+; LA32-NEXT:    ld.w $t3, $a1, 8
+; LA32-NEXT:    mulh.wu $a0, $t2, $t3
+; LA32-NEXT:    mul.w $t5, $t4, $t3
+; LA32-NEXT:    add.w $a0, $t5, $a0
+; LA32-NEXT:    sltu $t5, $a0, $t5
+; LA32-NEXT:    mulh.wu $t6, $t4, $t3
+; LA32-NEXT:    add.w $t5, $t6, $t5
+; LA32-NEXT:    ld.w $t7, $a1, 12
+; LA32-NEXT:    mul.w $a1, $t2, $t7
+; LA32-NEXT:    add.w $a0, $a1, $a0
+; LA32-NEXT:    st.w $a0, $sp, 48 # 4-byte Folded Spill
+; LA32-NEXT:    sltu $a1, $a0, $a1
+; LA32-NEXT:    mulh.wu $t6, $t2, $t7
+; LA32-NEXT:    add.w $t6, $t6, $a1
+; LA32-NEXT:    srai.w $s7, $t4, 31
+; LA32-NEXT:    mul.w $a1, $s7, $t7
+; LA32-NEXT:    mulh.wu $t8, $s7, $t3
+; LA32-NEXT:    add.w $t8, $t8, $a1
+; LA32-NEXT:    mulh.wu $fp, $a6, $s7
+; LA32-NEXT:    mul.w $s6, $t0, $s7
+; LA32-NEXT:    add.w $s8, $s6, $fp
+; LA32-NEXT:    mul.w $a1, $a6, $s7
+; LA32-NEXT:    add.w $ra, $a1, $s8
+; LA32-NEXT:    sltu $s0, $ra, $a1
+; LA32-NEXT:    add.w $a0, $fp, $s0
+; LA32-NEXT:    add.w $a3, $a4, $t1
+; LA32-NEXT:    st.w $a3, $sp, 20 # 4-byte Folded Spill
+; LA32-NEXT:    sltu $a4, $a3, $a4
+; LA32-NEXT:    mulh.wu $t1, $a5, $t0
+; LA32-NEXT:    add.w $a3, $t1, $a4
+; LA32-NEXT:    st.w $a3, $sp, 28 # 4-byte Folded Spill
+; LA32-NEXT:    srai.w $s4, $t7, 31
+; LA32-NEXT:    mul.w $fp, $a7, $s4
+; LA32-NEXT:    mulh.wu $a4, $a7, $s4
+; LA32-NEXT:    add.w $s1, $a4, $fp
+; LA32-NEXT:    sltu $s0, $s1, $fp
+; LA32-NEXT:    add.w $s5, $a4, $s0
+; LA32-NEXT:    mul.w $a4, $s7, $t3
+; LA32-NEXT:    add.w $t8, $t8, $a4
+; LA32-NEXT:    add.w $s0, $ra, $t8
+; LA32-NEXT:    add.w $a3, $a1, $a4
+; LA32-NEXT:    st.w $a3, $sp, 32 # 4-byte Folded Spill
+; LA32-NEXT:    sltu $a4, $a3, $a1
+; LA32-NEXT:    add.w $a3, $s0, $a4
+; LA32-NEXT:    st.w $a3, $sp, 24 # 4-byte Folded Spill
+; LA32-NEXT:    add.w $s3, $t5, $t6
+; LA32-NEXT:    sltu $a4, $s3, $t5
+; LA32-NEXT:    mulh.wu $t5, $t4, $t7
+; LA32-NEXT:    add.w $a3, $t5, $a4
+; LA32-NEXT:    st.w $a3, $sp, 16 # 4-byte Folded Spill
+; LA32-NEXT:    mul.w $a4, $a7, $a6
+; LA32-NEXT:    st.w $a4, $a2, 0
+; LA32-NEXT:    sltu $a4, $s8, $s6
+; LA32-NEXT:    mulh.wu $t5, $t0, $s7
+; LA32-NEXT:    add.w $a4, $t5, $a4
+; LA32-NEXT:    add.w $t1, $a4, $a0
+; LA32-NEXT:    sltu $a4, $t1, $a4
+; LA32-NEXT:    add.w $s2, $t5, $a4
+; LA32-NEXT:    mulh.wu $a4, $a7, $t3
+; LA32-NEXT:    mul.w $t5, $a5, $t3
+; LA32-NEXT:    add.w $a4, $t5, $a4
+; LA32-NEXT:    sltu $t5, $a4, $t5
+; LA32-NEXT:    mulh.wu $t6, $a5, $t3
+; LA32-NEXT:    add.w $a3, $t6, $t5
+; LA32-NEXT:    mul.w $t6, $a7, $t7
+; LA32-NEXT:    add.w $t5, $t6, $a4
+; LA32-NEXT:    sltu $a4, $t5, $t6
+; LA32-NEXT:    mulh.wu $t6, $a7, $t7
+; LA32-NEXT:    add.w $a4, $t6, $a4
+; LA32-NEXT:    mulh.wu $t6, $t2, $a6
+; LA32-NEXT:    mul.w $s7, $t4, $a6
+; LA32-NEXT:    add.w $t6, $s7, $t6
+; LA32-NEXT:    sltu $s7, $t6, $s7
+; LA32-NEXT:    mulh.wu $s8, $t4, $a6
+; LA32-NEXT:    add.w $a0, $s8, $s7
+; LA32-NEXT:    mul.w $s7, $t2, $t0
+; LA32-NEXT:    add.w $t6, $s7, $t6
+; LA32-NEXT:    sltu $s7, $t6, $s7
+; LA32-NEXT:    mulh.wu $s8, $t2, $t0
+; LA32-NEXT:    add.w $a2, $s8, $s7
+; LA32-NEXT:    mul.w $s8, $a5, $s4
+; LA32-NEXT:    add.w $s7, $s1, $s8
+; LA32-NEXT:    add.w $s1, $s7, $ra
+; LA32-NEXT:    add.w $a1, $fp, $a1
+; LA32-NEXT:    st.w $a1, $sp, 40 # 4-byte Folded Spill
+; LA32-NEXT:    sltu $ra, $a1, $fp
+; LA32-NEXT:    add.w $a1, $s1, $ra
+; LA32-NEXT:    st.w $a1, $sp, 36 # 4-byte Folded Spill
+; LA32-NEXT:    xor $s0, $a1, $s7
+; LA32-NEXT:    sltui $s0, $s0, 1
+; LA32-NEXT:    sltu $a1, $a1, $s7
+; LA32-NEXT:    masknez $s1, $a1, $s0
+; LA32-NEXT:    maskeqz $s0, $ra, $s0
+; LA32-NEXT:    add.w $t1, $s6, $t1
+; LA32-NEXT:    sltu $s6, $t1, $s6
+; LA32-NEXT:    add.w $s2, $s2, $s6
+; LA32-NEXT:    add.w $a2, $a0, $a2
+; LA32-NEXT:    sltu $a0, $a2, $a0
+; LA32-NEXT:    mulh.wu $s6, $t4, $t0
+; LA32-NEXT:    add.w $t8, $s6, $a0
+; LA32-NEXT:    add.w $a4, $a3, $a4
+; LA32-NEXT:    sltu $a3, $a4, $a3
+; LA32-NEXT:    mulh.wu $s6, $a5, $t7
+; LA32-NEXT:    add.w $a3, $s6, $a3
+; LA32-NEXT:    mul.w $s6, $t4, $t7
+; LA32-NEXT:    mul.w $t7, $a5, $t7
+; LA32-NEXT:    mul.w $ra, $t4, $t0
+; LA32-NEXT:    mul.w $t0, $a5, $t0
+; LA32-NEXT:    mul.w $t4, $t4, $s4
+; LA32-NEXT:    mul.w $a7, $a7, $t3
+; LA32-NEXT:    mul.w $a6, $t2, $a6
+; LA32-NEXT:    mul.w $t3, $t2, $t3
+; LA32-NEXT:    mul.w $a0, $t2, $s4
+; LA32-NEXT:    mulh.wu $t2, $t2, $s4
+; LA32-NEXT:    mulh.wu $a5, $s4, $a5
+; LA32-NEXT:    sltu $s4, $s7, $s8
+; LA32-NEXT:    add.w $s4, $a5, $s4
+; LA32-NEXT:    add.w $s4, $s5, $s4
+; LA32-NEXT:    sltu $s5, $s4, $s5
+; LA32-NEXT:    add.w $s5, $a5, $s5
+; LA32-NEXT:    ld.w $a1, $sp, 20 # 4-byte Folded Reload
+; LA32-NEXT:    add.w $a1, $t0, $a1
+; LA32-NEXT:    sltu $a5, $a1, $t0
+; LA32-NEXT:    ld.w $t0, $sp, 28 # 4-byte Folded Reload
+; LA32-NEXT:    add.w $t0, $t0, $a5
+; LA32-NEXT:    or $s0, $s0, $s1
+; LA32-NEXT:    add.w $a4, $t7, $a4
+; LA32-NEXT:    sltu $a5, $a4, $t7
+; LA32-NEXT:    add.w $t7, $a3, $a5
+; LA32-NEXT:    add.w $s1, $ra, $a2
+; LA32-NEXT:    sltu $a2, $s1, $ra
+; LA32-NEXT:    add.w $t8, $t8, $a2
+; LA32-NEXT:    add.w $a5, $s6, $s3
+; LA32-NEXT:    sltu $a2, $a5, $s6
+; LA32-NEXT:    ld.w $a3, $sp, 16 # 4-byte Folded Reload
+; LA32-NEXT:    add.w $a2, $a3, $a2
+; LA32-NEXT:    ld.w $s6, $sp, 12 # 4-byte Folded Reload
+; LA32-NEXT:    ld.w $a3, $sp, 44 # 4-byte Folded Reload
+; LA32-NEXT:    st.w $a3, $s6, 4
+; LA32-NEXT:    ld.w $a3, $sp, 24 # 4-byte Folded Reload
+; LA32-NEXT:    add.w $a3, $s2, $a3
+; LA32-NEXT:    ld.w $s2, $sp, 32 # 4-byte Folded Reload
+; LA32-NEXT:    add.w $s2, $t1, $s2
+; LA32-NEXT:    sltu $t1, $s2, $t1
+; LA32-NEXT:    add.w $a3, $a3, $t1
+; LA32-NEXT:    add.w $t1, $s8, $s4
+; LA32-NEXT:    sltu $s3, $t1, $s8
+; LA32-NEXT:    add.w $s3, $s5, $s3
+; LA32-NEXT:    add.w $t2, $t2, $a0
+; LA32-NEXT:    add.w $t2, $t2, $t4
+; LA32-NEXT:    add.w $t2, $t2, $s7
+; LA32-NEXT:    add.w $t4, $a0, $fp
+; LA32-NEXT:    sltu $a0, $t4, $a0
+; LA32-NEXT:    add.w $a0, $t2, $a0
+; LA32-NEXT:    add.w $a0, $s3, $a0
+; LA32-NEXT:    add.w $t2, $t1, $t4
+; LA32-NEXT:    sltu $t1, $t2, $t1
+; LA32-NEXT:    add.w $a0, $a0, $t1
+; LA32-NEXT:    add.w $a0, $a0, $a3
+; LA32-NEXT:    add.w $t1, $t2, $s2
+; LA32-NEXT:    sltu $a3, $t1, $t2
+; LA32-NEXT:    add.w $a0, $a0, $a3
+; LA32-NEXT:    add.w $a3, $t6, $t0
+; LA32-NEXT:    add.w $a1, $a6, $a1
+; LA32-NEXT:    sltu $a6, $a1, $a6
+; LA32-NEXT:    add.w $t0, $a3, $a6
+; LA32-NEXT:    add.w $a1, $a7, $a1
+; LA32-NEXT:    sltu $a7, $a1, $a7
+; LA32-NEXT:    add.w $a3, $t5, $t0
+; LA32-NEXT:    add.w $a3, $a3, $a7
+; LA32-NEXT:    sltu $t2, $a3, $t5
+; LA32-NEXT:    xor $t4, $a3, $t5
+; LA32-NEXT:    sltui $t4, $t4, 1
+; LA32-NEXT:    masknez $t2, $t2, $t4
+; LA32-NEXT:    maskeqz $a7, $a7, $t4
+; LA32-NEXT:    st.w $a1, $s6, 8
+; LA32-NEXT:    or $a1, $a7, $t2
+; LA32-NEXT:    sltu $a7, $t0, $t6
+; LA32-NEXT:    xor $t0, $t0, $t6
+; LA32-NEXT:    sltui $t0, $t0, 1
+; LA32-NEXT:    masknez $a7, $a7, $t0
+; LA32-NEXT:    maskeqz $a6, $a6, $t0
+; LA32-NEXT:    or $a6, $a6, $a7
+; LA32-NEXT:    add.w $a6, $s1, $a6
+; LA32-NEXT:    sltu $a7, $a6, $s1
+; LA32-NEXT:    add.w $a7, $t8, $a7
+; LA32-NEXT:    add.w $a1, $a4, $a1
+; LA32-NEXT:    sltu $a4, $a1, $a4
+; LA32-NEXT:    add.w $a4, $t7, $a4
+; LA32-NEXT:    add.w $t0, $t1, $s0
+; LA32-NEXT:    sltu $t1, $t0, $t1
+; LA32-NEXT:    add.w $a0, $a0, $t1
+; LA32-NEXT:    st.w $a3, $s6, 12
+; LA32-NEXT:    add.w $a1, $a6, $a1
+; LA32-NEXT:    sltu $a6, $a1, $a6
+; LA32-NEXT:    add.w $a4, $a7, $a4
+; LA32-NEXT:    add.w $a4, $a4, $a6
+; LA32-NEXT:    sltu $t1, $a4, $a7
+; LA32-NEXT:    xor $a7, $a4, $a7
+; LA32-NEXT:    sltui $a7, $a7, 1
+; LA32-NEXT:    masknez $t1, $t1, $a7
+; LA32-NEXT:    maskeqz $a6, $a6, $a7
+; LA32-NEXT:    or $a6, $a6, $t1
+; LA32-NEXT:    add.w $a6, $a5, $a6
+; LA32-NEXT:    sltu $a5, $a6, $a5
+; LA32-NEXT:    add.w $a2, $a2, $a5
+; LA32-NEXT:    ld.w $t1, $sp, 48 # 4-byte Folded Reload
+; LA32-NEXT:    add.w $a4, $t1, $a4
+; LA32-NEXT:    add.w $a1, $t3, $a1
+; LA32-NEXT:    sltu $a5, $a1, $t3
+; LA32-NEXT:    add.w $a4, $a4, $a5
+; LA32-NEXT:    sltu $a7, $a4, $t1
+; LA32-NEXT:    xor $t1, $a4, $t1
+; LA32-NEXT:    sltui $t1, $t1, 1
+; LA32-NEXT:    masknez $a7, $a7, $t1
+; LA32-NEXT:    maskeqz $a5, $a5, $t1
+; LA32-NEXT:    or $a5, $a5, $a7
+; LA32-NEXT:    add.w $a5, $a6, $a5
+; LA32-NEXT:    sltu $a6, $a5, $a6
+; LA32-NEXT:    add.w $a2, $a2, $a6
+; LA32-NEXT:    add.w $a0, $a2, $a0
+; LA32-NEXT:    add.w $a2, $a5, $t0
+; LA32-NEXT:    sltu $a5, $a2, $a5
+; LA32-NEXT:    add.w $a0, $a0, $a5
+; LA32-NEXT:    ld.w $a5, $sp, 40 # 4-byte Folded Reload
+; LA32-NEXT:    add.w $a5, $a1, $a5
+; LA32-NEXT:    sltu $a1, $a5, $a1
+; LA32-NEXT:    ld.w $a6, $sp, 36 # 4-byte Folded Reload
+; LA32-NEXT:    add.w $a6, $a4, $a6
+; LA32-NEXT:    add.w $a6, $a6, $a1
+; LA32-NEXT:    sltu $a7, $a6, $a4
+; LA32-NEXT:    xor $a4, $a6, $a4
+; LA32-NEXT:    sltui $a4, $a4, 1
+; LA32-NEXT:    masknez $a7, $a7, $a4
+; LA32-NEXT:    maskeqz $a1, $a1, $a4
+; LA32-NEXT:    or $a1, $a1, $a7
+; LA32-NEXT:    add.w $a1, $a2, $a1
+; LA32-NEXT:    sltu $a2, $a1, $a2
+; LA32-NEXT:    add.w $a0, $a0, $a2
+; LA32-NEXT:    srai.w $a2, $a3, 31
+; LA32-NEXT:    xor $a3, $a6, $a2
+; LA32-NEXT:    xor $a0, $a0, $a2
+; LA32-NEXT:    or $a0, $a3, $a0
+; LA32-NEXT:    xor $a3, $a5, $a2
+; LA32-NEXT:    xor $a1, $a1, $a2
+; LA32-NEXT:    or $a1, $a3, $a1
+; LA32-NEXT:    or $a0, $a1, $a0
 ; LA32-NEXT:    sltu $a0, $zero, $a0
-; LA32-NEXT:    ld.w $fp, $sp, 56 # 4-byte Folded Reload
-; LA32-NEXT:    ld.w $ra, $sp, 60 # 4-byte Folded Reload
-; LA32-NEXT:    addi.w $sp, $sp, 64
+; LA32-NEXT:    ld.w $s8, $sp, 52 # 4-byte Folded Reload
+; LA32-NEXT:    ld.w $s7, $sp, 56 # 4-byte Folded Reload
+; LA32-NEXT:    ld.w $s6, $sp, 60 # 4-byte Folded Reload
+; LA32-NEXT:    ld.w $s5, $sp, 64 # 4-byte Folded Reload
+; LA32-NEXT:    ld.w $s4, $sp, 68 # 4-byte Folded Reload
+; LA32-NEXT:    ld.w $s3, $sp, 72 # 4-byte Folded Reload
+; LA32-NEXT:    ld.w $s2, $sp, 76 # 4-byte Folded Reload
+; LA32-NEXT:    ld.w $s1, $sp, 80 # 4-byte Folded Reload
+; LA32-NEXT:    ld.w $s0, $sp, 84 # 4-byte Folded Reload
+; LA32-NEXT:    ld.w $fp, $sp, 88 # 4-byte Folded Reload
+; LA32-NEXT:    ld.w $ra, $sp, 92 # 4-byte Folded Reload
+; LA32-NEXT:    addi.w $sp, $sp, 96
 ; LA32-NEXT:    ret
 ;
 ; LA64-LABEL: smuloi128:
 ; LA64:       # %bb.0:
-; LA64-NEXT:    addi.d $sp, $sp, -32
-; LA64-NEXT:    .cfi_def_cfa_offset 32
-; LA64-NEXT:    st.d $ra, $sp, 24 # 8-byte Folded Spill
-; LA64-NEXT:    st.d $fp, $sp, 16 # 8-byte Folded Spill
-; LA64-NEXT:    .cfi_offset 1, -8
-; LA64-NEXT:    .cfi_offset 22, -16
-; LA64-NEXT:    move $fp, $a4
-; LA64-NEXT:    st.d $zero, $sp, 8
-; LA64-NEXT:    addi.d $a4, $sp, 8
-; LA64-NEXT:    bl %plt(__muloti4)
-; LA64-NEXT:    st.d $a1, $fp, 8
-; LA64-NEXT:    st.d $a0, $fp, 0
-; LA64-NEXT:    ld.d $a0, $sp, 8
+; LA64-NEXT:    srai.d $a5, $a1, 63
+; LA64-NEXT:    mul.d $a6, $a2, $a5
+; LA64-NEXT:    mulh.du $a7, $a2, $a5
+; LA64-NEXT:    add.d $a7, $a7, $a6
+; LA64-NEXT:    mul.d $a5, $a3, $a5
+; LA64-NEXT:    add.d $a5, $a7, $a5
+; LA64-NEXT:    srai.d $a7, $a3, 63
+; LA64-NEXT:    mul.d $t0, $a7, $a1
+; LA64-NEXT:    mulh.du $t1, $a7, $a0
+; LA64-NEXT:    add.d $t0, $t1, $t0
+; LA64-NEXT:    mul.d $a7, $a7, $a0
+; LA64-NEXT:    add.d $t0, $t0, $a7
+; LA64-NEXT:    add.d $a5, $t0, $a5
+; LA64-NEXT:    mulh.du $t0, $a0, $a2
+; LA64-NEXT:    mul.d $t1, $a1, $a2
+; LA64-NEXT:    add.d $t0, $t1, $t0
+; LA64-NEXT:    sltu $t1, $t0, $t1
+; LA64-NEXT:    mulh.du $t2, $a1, $a2
+; LA64-NEXT:    add.d $t1, $t2, $t1
+; LA64-NEXT:    mul.d $t2, $a0, $a3
+; LA64-NEXT:    add.d $t0, $t2, $t0
+; LA64-NEXT:    sltu $t2, $t0, $t2
+; LA64-NEXT:    mulh.du $t3, $a0, $a3
+; LA64-NEXT:    add.d $t2, $t3, $t2
+; LA64-NEXT:    add.d $a6, $a7, $a6
+; LA64-NEXT:    sltu $a7, $a6, $a7
+; LA64-NEXT:    add.d $a5, $a5, $a7
+; LA64-NEXT:    mul.d $a0, $a0, $a2
+; LA64-NEXT:    mul.d $a2, $a1, $a3
+; LA64-NEXT:    mulh.du $a1, $a1, $a3
+; LA64-NEXT:    add.d $a3, $t1, $t2
+; LA64-NEXT:    sltu $a7, $a3, $t1
+; LA64-NEXT:    add.d $a1, $a1, $a7
+; LA64-NEXT:    st.d $a0, $a4, 0
+; LA64-NEXT:    add.d $a0, $a2, $a3
+; LA64-NEXT:    sltu $a2, $a0, $a2
+; LA64-NEXT:    add.d $a1, $a1, $a2
+; LA64-NEXT:    st.d $t0, $a4, 8
+; LA64-NEXT:    add.d $a1, $a1, $a5
+; LA64-NEXT:    add.d $a2, $a0, $a6
+; LA64-NEXT:    sltu $a0, $a2, $a0
+; LA64-NEXT:    add.d $a0, $a1, $a0
+; LA64-NEXT:    srai.d $a1, $t0, 63
+; LA64-NEXT:    xor $a0, $a0, $a1
+; LA64-NEXT:    xor $a1, $a2, $a1
+; LA64-NEXT:    or $a0, $a1, $a0
 ; LA64-NEXT:    sltu $a0, $zero, $a0
-; LA64-NEXT:    ld.d $fp, $sp, 16 # 8-byte Folded Reload
-; LA64-NEXT:    ld.d $ra, $sp, 24 # 8-byte Folded Reload
-; LA64-NEXT:    addi.d $sp, $sp, 32
 ; LA64-NEXT:    ret
   %t = call {i128, i1} @llvm.smul.with.overflow.i128(i128 %v1, i128 %v2)
   %val = extractvalue {i128, i1} %t, 0
-- 
2.20.1


From 01ced6193e2abfbd50fbd9d40066cf27f9f9067b Mon Sep 17 00:00:00 2001
From: wanglei <wanglei@loongson.cn>
Date: Wed, 29 Nov 2023 15:21:21 +0800
Subject: [PATCH 12/14] [LoongArch] Fix pattern for FNMSUB_{S/D} instructions
 (#73742)

```
when a=c=-0.0, b=0.0:
-(a * b + (-c)) = -0.0
-a * b + c = 0.0
(fneg (fma a, b (-c))) != (fma (fneg a), b ,c)
```

See https://reviews.llvm.org/D90901 for a similar discussion on X86.

(cherry picked from commit 5e7e0d603204ede803323a825318e365a87f73e9)
---
 .../LoongArch/LoongArchFloat32InstrInfo.td    |   8 +-
 .../LoongArch/LoongArchFloat64InstrInfo.td    |   6 +-
 llvm/test/CodeGen/LoongArch/double-fma.ll     | 259 ++++++++++++++++--
 llvm/test/CodeGen/LoongArch/float-fma.ll      | 259 ++++++++++++++++--
 4 files changed, 483 insertions(+), 49 deletions(-)

diff --git a/llvm/lib/Target/LoongArch/LoongArchFloat32InstrInfo.td b/llvm/lib/Target/LoongArch/LoongArchFloat32InstrInfo.td
index 826db54febd3..65120c083f49 100644
--- a/llvm/lib/Target/LoongArch/LoongArchFloat32InstrInfo.td
+++ b/llvm/lib/Target/LoongArch/LoongArchFloat32InstrInfo.td
@@ -294,8 +294,12 @@ def : Pat<(fneg (fma FPR32:$fj, FPR32:$fk, FPR32:$fa)),
 def : Pat<(fma_nsz (fneg FPR32:$fj), FPR32:$fk, (fneg FPR32:$fa)),
           (FNMADD_S FPR32:$fj, FPR32:$fk, FPR32:$fa)>;
 
-// fnmsub.s: -fj * fk + fa
-def : Pat<(fma (fneg FPR32:$fj), FPR32:$fk, FPR32:$fa),
+// fnmsub.s: -(fj * fk - fa)
+def : Pat<(fneg (fma FPR32:$fj, FPR32:$fk, (fneg FPR32:$fa))),
+          (FNMSUB_S FPR32:$fj, FPR32:$fk, FPR32:$fa)>;
+
+// fnmsub.s: -fj * fk + fa (the nsz flag on the FMA)
+def : Pat<(fma_nsz (fneg FPR32:$fj), FPR32:$fk, FPR32:$fa),
           (FNMSUB_S FPR32:$fj, FPR32:$fk, FPR32:$fa)>;
 } // Predicates = [HasBasicF]
 
diff --git a/llvm/lib/Target/LoongArch/LoongArchFloat64InstrInfo.td b/llvm/lib/Target/LoongArch/LoongArchFloat64InstrInfo.td
index 5118474725b6..437c1e4d7be2 100644
--- a/llvm/lib/Target/LoongArch/LoongArchFloat64InstrInfo.td
+++ b/llvm/lib/Target/LoongArch/LoongArchFloat64InstrInfo.td
@@ -256,7 +256,11 @@ def : Pat<(fma_nsz (fneg FPR64:$fj), FPR64:$fk, (fneg FPR64:$fa)),
           (FNMADD_D FPR64:$fj, FPR64:$fk, FPR64:$fa)>;
 
 // fnmsub.d: -(fj * fk - fa)
-def : Pat<(fma (fneg FPR64:$fj), FPR64:$fk, FPR64:$fa),
+def : Pat<(fneg (fma FPR64:$fj, FPR64:$fk, (fneg FPR64:$fa))),
+          (FNMSUB_D FPR64:$fj, FPR64:$fk, FPR64:$fa)>;
+
+// fnmsub.d: -fj * fk + fa (the nsz flag on the FMA)
+def : Pat<(fma_nsz (fneg FPR64:$fj), FPR64:$fk, FPR64:$fa),
           (FNMSUB_D FPR64:$fj, FPR64:$fk, FPR64:$fa)>;
 } // Predicates = [HasBasicD]
 
diff --git a/llvm/test/CodeGen/LoongArch/double-fma.ll b/llvm/test/CodeGen/LoongArch/double-fma.ll
index 6dd628479433..58d20c62a668 100644
--- a/llvm/test/CodeGen/LoongArch/double-fma.ll
+++ b/llvm/test/CodeGen/LoongArch/double-fma.ll
@@ -236,13 +236,15 @@ define double @fnmsub_d(double %a, double %b, double %c) nounwind {
 ; LA32-CONTRACT-ON-LABEL: fnmsub_d:
 ; LA32-CONTRACT-ON:       # %bb.0:
 ; LA32-CONTRACT-ON-NEXT:    fmul.d $fa0, $fa0, $fa1
-; LA32-CONTRACT-ON-NEXT:    fsub.d $fa0, $fa2, $fa0
+; LA32-CONTRACT-ON-NEXT:    fsub.d $fa0, $fa0, $fa2
+; LA32-CONTRACT-ON-NEXT:    fneg.d $fa0, $fa0
 ; LA32-CONTRACT-ON-NEXT:    ret
 ;
 ; LA32-CONTRACT-OFF-LABEL: fnmsub_d:
 ; LA32-CONTRACT-OFF:       # %bb.0:
 ; LA32-CONTRACT-OFF-NEXT:    fmul.d $fa0, $fa0, $fa1
-; LA32-CONTRACT-OFF-NEXT:    fsub.d $fa0, $fa2, $fa0
+; LA32-CONTRACT-OFF-NEXT:    fsub.d $fa0, $fa0, $fa2
+; LA32-CONTRACT-OFF-NEXT:    fneg.d $fa0, $fa0
 ; LA32-CONTRACT-OFF-NEXT:    ret
 ;
 ; LA64-CONTRACT-FAST-LABEL: fnmsub_d:
@@ -253,12 +255,98 @@ define double @fnmsub_d(double %a, double %b, double %c) nounwind {
 ; LA64-CONTRACT-ON-LABEL: fnmsub_d:
 ; LA64-CONTRACT-ON:       # %bb.0:
 ; LA64-CONTRACT-ON-NEXT:    fmul.d $fa0, $fa0, $fa1
-; LA64-CONTRACT-ON-NEXT:    fsub.d $fa0, $fa2, $fa0
+; LA64-CONTRACT-ON-NEXT:    fsub.d $fa0, $fa0, $fa2
+; LA64-CONTRACT-ON-NEXT:    fneg.d $fa0, $fa0
 ; LA64-CONTRACT-ON-NEXT:    ret
 ;
 ; LA64-CONTRACT-OFF-LABEL: fnmsub_d:
 ; LA64-CONTRACT-OFF:       # %bb.0:
 ; LA64-CONTRACT-OFF-NEXT:    fmul.d $fa0, $fa0, $fa1
+; LA64-CONTRACT-OFF-NEXT:    fsub.d $fa0, $fa0, $fa2
+; LA64-CONTRACT-OFF-NEXT:    fneg.d $fa0, $fa0
+; LA64-CONTRACT-OFF-NEXT:    ret
+  %negc = fneg double %c
+  %mul = fmul double %a, %b
+  %add = fadd double %mul, %negc
+  %neg = fneg double %add
+  ret double %neg
+}
+
+define double @fnmsub_d_nsz(double %a, double %b, double %c) nounwind {
+; LA32-CONTRACT-FAST-LABEL: fnmsub_d_nsz:
+; LA32-CONTRACT-FAST:       # %bb.0:
+; LA32-CONTRACT-FAST-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-FAST-NEXT:    ret
+;
+; LA32-CONTRACT-ON-LABEL: fnmsub_d_nsz:
+; LA32-CONTRACT-ON:       # %bb.0:
+; LA32-CONTRACT-ON-NEXT:    fmul.d $fa0, $fa0, $fa1
+; LA32-CONTRACT-ON-NEXT:    fsub.d $fa0, $fa2, $fa0
+; LA32-CONTRACT-ON-NEXT:    ret
+;
+; LA32-CONTRACT-OFF-LABEL: fnmsub_d_nsz:
+; LA32-CONTRACT-OFF:       # %bb.0:
+; LA32-CONTRACT-OFF-NEXT:    fmul.d $fa0, $fa0, $fa1
+; LA32-CONTRACT-OFF-NEXT:    fsub.d $fa0, $fa2, $fa0
+; LA32-CONTRACT-OFF-NEXT:    ret
+;
+; LA64-CONTRACT-FAST-LABEL: fnmsub_d_nsz:
+; LA64-CONTRACT-FAST:       # %bb.0:
+; LA64-CONTRACT-FAST-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-FAST-NEXT:    ret
+;
+; LA64-CONTRACT-ON-LABEL: fnmsub_d_nsz:
+; LA64-CONTRACT-ON:       # %bb.0:
+; LA64-CONTRACT-ON-NEXT:    fmul.d $fa0, $fa0, $fa1
+; LA64-CONTRACT-ON-NEXT:    fsub.d $fa0, $fa2, $fa0
+; LA64-CONTRACT-ON-NEXT:    ret
+;
+; LA64-CONTRACT-OFF-LABEL: fnmsub_d_nsz:
+; LA64-CONTRACT-OFF:       # %bb.0:
+; LA64-CONTRACT-OFF-NEXT:    fmul.d $fa0, $fa0, $fa1
+; LA64-CONTRACT-OFF-NEXT:    fsub.d $fa0, $fa2, $fa0
+; LA64-CONTRACT-OFF-NEXT:    ret
+  %nega = fneg nsz double %a
+  %mul = fmul nsz double %nega, %b
+  %add = fadd nsz double %mul, %c
+  ret double %add
+}
+
+;; Check that fnmsub.d is not emitted.
+define double @not_fnmsub_d(double %a, double %b, double %c) nounwind {
+; LA32-CONTRACT-FAST-LABEL: not_fnmsub_d:
+; LA32-CONTRACT-FAST:       # %bb.0:
+; LA32-CONTRACT-FAST-NEXT:    fneg.d $fa0, $fa0
+; LA32-CONTRACT-FAST-NEXT:    fmadd.d $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-FAST-NEXT:    ret
+;
+; LA32-CONTRACT-ON-LABEL: not_fnmsub_d:
+; LA32-CONTRACT-ON:       # %bb.0:
+; LA32-CONTRACT-ON-NEXT:    fmul.d $fa0, $fa0, $fa1
+; LA32-CONTRACT-ON-NEXT:    fsub.d $fa0, $fa2, $fa0
+; LA32-CONTRACT-ON-NEXT:    ret
+;
+; LA32-CONTRACT-OFF-LABEL: not_fnmsub_d:
+; LA32-CONTRACT-OFF:       # %bb.0:
+; LA32-CONTRACT-OFF-NEXT:    fmul.d $fa0, $fa0, $fa1
+; LA32-CONTRACT-OFF-NEXT:    fsub.d $fa0, $fa2, $fa0
+; LA32-CONTRACT-OFF-NEXT:    ret
+;
+; LA64-CONTRACT-FAST-LABEL: not_fnmsub_d:
+; LA64-CONTRACT-FAST:       # %bb.0:
+; LA64-CONTRACT-FAST-NEXT:    fneg.d $fa0, $fa0
+; LA64-CONTRACT-FAST-NEXT:    fmadd.d $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-FAST-NEXT:    ret
+;
+; LA64-CONTRACT-ON-LABEL: not_fnmsub_d:
+; LA64-CONTRACT-ON:       # %bb.0:
+; LA64-CONTRACT-ON-NEXT:    fmul.d $fa0, $fa0, $fa1
+; LA64-CONTRACT-ON-NEXT:    fsub.d $fa0, $fa2, $fa0
+; LA64-CONTRACT-ON-NEXT:    ret
+;
+; LA64-CONTRACT-OFF-LABEL: not_fnmsub_d:
+; LA64-CONTRACT-OFF:       # %bb.0:
+; LA64-CONTRACT-OFF-NEXT:    fmul.d $fa0, $fa0, $fa1
 ; LA64-CONTRACT-OFF-NEXT:    fsub.d $fa0, $fa2, $fa0
 ; LA64-CONTRACT-OFF-NEXT:    ret
   %nega = fneg double %a
@@ -483,6 +571,86 @@ define double @contract_fnmsub_d(double %a, double %b, double %c) nounwind {
 ; LA64-CONTRACT-OFF-LABEL: contract_fnmsub_d:
 ; LA64-CONTRACT-OFF:       # %bb.0:
 ; LA64-CONTRACT-OFF-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-OFF-NEXT:    ret
+  %negc = fneg contract double %c
+  %mul = fmul contract double %a, %b
+  %add = fadd contract double %mul, %negc
+  %neg = fneg contract double %add
+  ret double %neg
+}
+
+define double @contract_fnmsub_d_nsz(double %a, double %b, double %c) nounwind {
+; LA32-CONTRACT-FAST-LABEL: contract_fnmsub_d_nsz:
+; LA32-CONTRACT-FAST:       # %bb.0:
+; LA32-CONTRACT-FAST-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-FAST-NEXT:    ret
+;
+; LA32-CONTRACT-ON-LABEL: contract_fnmsub_d_nsz:
+; LA32-CONTRACT-ON:       # %bb.0:
+; LA32-CONTRACT-ON-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-ON-NEXT:    ret
+;
+; LA32-CONTRACT-OFF-LABEL: contract_fnmsub_d_nsz:
+; LA32-CONTRACT-OFF:       # %bb.0:
+; LA32-CONTRACT-OFF-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-OFF-NEXT:    ret
+;
+; LA64-CONTRACT-FAST-LABEL: contract_fnmsub_d_nsz:
+; LA64-CONTRACT-FAST:       # %bb.0:
+; LA64-CONTRACT-FAST-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-FAST-NEXT:    ret
+;
+; LA64-CONTRACT-ON-LABEL: contract_fnmsub_d_nsz:
+; LA64-CONTRACT-ON:       # %bb.0:
+; LA64-CONTRACT-ON-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-ON-NEXT:    ret
+;
+; LA64-CONTRACT-OFF-LABEL: contract_fnmsub_d_nsz:
+; LA64-CONTRACT-OFF:       # %bb.0:
+; LA64-CONTRACT-OFF-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-OFF-NEXT:    ret
+  %nega = fneg contract nsz double %a
+  %mul = fmul contract nsz double %nega, %b
+  %add = fadd contract nsz double %mul, %c
+  ret double %add
+}
+
+;; Check that fnmsub.d is not emitted.
+define double @not_contract_fnmsub_d(double %a, double %b, double %c) nounwind {
+; LA32-CONTRACT-FAST-LABEL: not_contract_fnmsub_d:
+; LA32-CONTRACT-FAST:       # %bb.0:
+; LA32-CONTRACT-FAST-NEXT:    fneg.d $fa0, $fa0
+; LA32-CONTRACT-FAST-NEXT:    fmadd.d $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-FAST-NEXT:    ret
+;
+; LA32-CONTRACT-ON-LABEL: not_contract_fnmsub_d:
+; LA32-CONTRACT-ON:       # %bb.0:
+; LA32-CONTRACT-ON-NEXT:    fneg.d $fa0, $fa0
+; LA32-CONTRACT-ON-NEXT:    fmadd.d $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-ON-NEXT:    ret
+;
+; LA32-CONTRACT-OFF-LABEL: not_contract_fnmsub_d:
+; LA32-CONTRACT-OFF:       # %bb.0:
+; LA32-CONTRACT-OFF-NEXT:    fneg.d $fa0, $fa0
+; LA32-CONTRACT-OFF-NEXT:    fmadd.d $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-OFF-NEXT:    ret
+;
+; LA64-CONTRACT-FAST-LABEL: not_contract_fnmsub_d:
+; LA64-CONTRACT-FAST:       # %bb.0:
+; LA64-CONTRACT-FAST-NEXT:    fneg.d $fa0, $fa0
+; LA64-CONTRACT-FAST-NEXT:    fmadd.d $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-FAST-NEXT:    ret
+;
+; LA64-CONTRACT-ON-LABEL: not_contract_fnmsub_d:
+; LA64-CONTRACT-ON:       # %bb.0:
+; LA64-CONTRACT-ON-NEXT:    fneg.d $fa0, $fa0
+; LA64-CONTRACT-ON-NEXT:    fmadd.d $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-ON-NEXT:    ret
+;
+; LA64-CONTRACT-OFF-LABEL: not_contract_fnmsub_d:
+; LA64-CONTRACT-OFF:       # %bb.0:
+; LA64-CONTRACT-OFF-NEXT:    fneg.d $fa0, $fa0
+; LA64-CONTRACT-OFF-NEXT:    fmadd.d $fa0, $fa0, $fa1, $fa2
 ; LA64-CONTRACT-OFF-NEXT:    ret
   %nega = fneg contract double %a
   %mul = fmul contract double %nega, %b
@@ -592,8 +760,8 @@ define double @fnmadd_d_intrinsics(double %a, double %b, double %c) nounwind {
 ; LA64-CONTRACT-OFF-NEXT:    fnmadd.d $fa0, $fa0, $fa1, $fa2
 ; LA64-CONTRACT-OFF-NEXT:    ret
   %fma = call double @llvm.fma.f64(double %a, double %b, double %c)
-  %neg = fneg double %fma
-  ret double %neg
+  %negfma = fneg double %fma
+  ret double %negfma
 }
 
 define double @fnmadd_d_nsz_intrinsics(double %a, double %b, double %c) nounwind {
@@ -704,44 +872,87 @@ define double @fnmsub_d_intrinsics(double %a, double %b, double %c) nounwind {
 ; LA64-CONTRACT-OFF-LABEL: fnmsub_d_intrinsics:
 ; LA64-CONTRACT-OFF:       # %bb.0:
 ; LA64-CONTRACT-OFF-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-OFF-NEXT:    ret
+  %negc = fneg double %c
+  %fma = call double @llvm.fma.f64(double %a, double %b, double %negc)
+  %negfma = fneg double %fma
+  ret double %negfma
+}
+
+define double @fnmsub_d_nsz_intrinsics(double %a, double %b, double %c) nounwind {
+; LA32-CONTRACT-FAST-LABEL: fnmsub_d_nsz_intrinsics:
+; LA32-CONTRACT-FAST:       # %bb.0:
+; LA32-CONTRACT-FAST-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-FAST-NEXT:    ret
+;
+; LA32-CONTRACT-ON-LABEL: fnmsub_d_nsz_intrinsics:
+; LA32-CONTRACT-ON:       # %bb.0:
+; LA32-CONTRACT-ON-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-ON-NEXT:    ret
+;
+; LA32-CONTRACT-OFF-LABEL: fnmsub_d_nsz_intrinsics:
+; LA32-CONTRACT-OFF:       # %bb.0:
+; LA32-CONTRACT-OFF-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-OFF-NEXT:    ret
+;
+; LA64-CONTRACT-FAST-LABEL: fnmsub_d_nsz_intrinsics:
+; LA64-CONTRACT-FAST:       # %bb.0:
+; LA64-CONTRACT-FAST-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-FAST-NEXT:    ret
+;
+; LA64-CONTRACT-ON-LABEL: fnmsub_d_nsz_intrinsics:
+; LA64-CONTRACT-ON:       # %bb.0:
+; LA64-CONTRACT-ON-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-ON-NEXT:    ret
+;
+; LA64-CONTRACT-OFF-LABEL: fnmsub_d_nsz_intrinsics:
+; LA64-CONTRACT-OFF:       # %bb.0:
+; LA64-CONTRACT-OFF-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
 ; LA64-CONTRACT-OFF-NEXT:    ret
   %nega = fneg double %a
-  %fma = call double @llvm.fma.f64(double %nega, double %b, double %c)
+  %fma = call nsz double @llvm.fma.f64(double %nega, double %b, double %c)
   ret double %fma
 }
 
-define double @fnmsub_d_swap_intrinsics(double %a, double %b, double %c) nounwind {
-; LA32-CONTRACT-FAST-LABEL: fnmsub_d_swap_intrinsics:
+;; Check that fnmsub.d is not emitted.
+define double @not_fnmsub_d_intrinsics(double %a, double %b, double %c) nounwind {
+; LA32-CONTRACT-FAST-LABEL: not_fnmsub_d_intrinsics:
 ; LA32-CONTRACT-FAST:       # %bb.0:
-; LA32-CONTRACT-FAST-NEXT:    fnmsub.d $fa0, $fa1, $fa0, $fa2
+; LA32-CONTRACT-FAST-NEXT:    fneg.d $fa0, $fa0
+; LA32-CONTRACT-FAST-NEXT:    fmadd.d $fa0, $fa0, $fa1, $fa2
 ; LA32-CONTRACT-FAST-NEXT:    ret
 ;
-; LA32-CONTRACT-ON-LABEL: fnmsub_d_swap_intrinsics:
+; LA32-CONTRACT-ON-LABEL: not_fnmsub_d_intrinsics:
 ; LA32-CONTRACT-ON:       # %bb.0:
-; LA32-CONTRACT-ON-NEXT:    fnmsub.d $fa0, $fa1, $fa0, $fa2
+; LA32-CONTRACT-ON-NEXT:    fneg.d $fa0, $fa0
+; LA32-CONTRACT-ON-NEXT:    fmadd.d $fa0, $fa0, $fa1, $fa2
 ; LA32-CONTRACT-ON-NEXT:    ret
 ;
-; LA32-CONTRACT-OFF-LABEL: fnmsub_d_swap_intrinsics:
+; LA32-CONTRACT-OFF-LABEL: not_fnmsub_d_intrinsics:
 ; LA32-CONTRACT-OFF:       # %bb.0:
-; LA32-CONTRACT-OFF-NEXT:    fnmsub.d $fa0, $fa1, $fa0, $fa2
+; LA32-CONTRACT-OFF-NEXT:    fneg.d $fa0, $fa0
+; LA32-CONTRACT-OFF-NEXT:    fmadd.d $fa0, $fa0, $fa1, $fa2
 ; LA32-CONTRACT-OFF-NEXT:    ret
 ;
-; LA64-CONTRACT-FAST-LABEL: fnmsub_d_swap_intrinsics:
+; LA64-CONTRACT-FAST-LABEL: not_fnmsub_d_intrinsics:
 ; LA64-CONTRACT-FAST:       # %bb.0:
-; LA64-CONTRACT-FAST-NEXT:    fnmsub.d $fa0, $fa1, $fa0, $fa2
+; LA64-CONTRACT-FAST-NEXT:    fneg.d $fa0, $fa0
+; LA64-CONTRACT-FAST-NEXT:    fmadd.d $fa0, $fa0, $fa1, $fa2
 ; LA64-CONTRACT-FAST-NEXT:    ret
 ;
-; LA64-CONTRACT-ON-LABEL: fnmsub_d_swap_intrinsics:
+; LA64-CONTRACT-ON-LABEL: not_fnmsub_d_intrinsics:
 ; LA64-CONTRACT-ON:       # %bb.0:
-; LA64-CONTRACT-ON-NEXT:    fnmsub.d $fa0, $fa1, $fa0, $fa2
+; LA64-CONTRACT-ON-NEXT:    fneg.d $fa0, $fa0
+; LA64-CONTRACT-ON-NEXT:    fmadd.d $fa0, $fa0, $fa1, $fa2
 ; LA64-CONTRACT-ON-NEXT:    ret
 ;
-; LA64-CONTRACT-OFF-LABEL: fnmsub_d_swap_intrinsics:
+; LA64-CONTRACT-OFF-LABEL: not_fnmsub_d_intrinsics:
 ; LA64-CONTRACT-OFF:       # %bb.0:
-; LA64-CONTRACT-OFF-NEXT:    fnmsub.d $fa0, $fa1, $fa0, $fa2
+; LA64-CONTRACT-OFF-NEXT:    fneg.d $fa0, $fa0
+; LA64-CONTRACT-OFF-NEXT:    fmadd.d $fa0, $fa0, $fa1, $fa2
 ; LA64-CONTRACT-OFF-NEXT:    ret
-  %negb = fneg double %b
-  %fma = call double @llvm.fma.f64(double %a, double %negb, double %c)
+  %nega = fneg double %a
+  %fma = call double @llvm.fma.f64(double %nega, double %b, double %c)
   ret double %fma
 }
 
@@ -882,6 +1093,8 @@ define double @fnmsub_d_contract(double %a, double %b, double %c) nounwind {
 ; LA64-CONTRACT-OFF-NEXT:    fnmsub.d $fa0, $fa0, $fa1, $fa2
 ; LA64-CONTRACT-OFF-NEXT:    ret
   %mul = fmul contract double %a, %b
-  %sub = fsub contract double %c, %mul
-  ret double %sub
+  %negc = fneg contract double %c
+  %add = fadd contract double %negc, %mul
+  %negadd = fneg contract double %add
+  ret double %negadd
 }
diff --git a/llvm/test/CodeGen/LoongArch/float-fma.ll b/llvm/test/CodeGen/LoongArch/float-fma.ll
index 54dc56784006..c236255d971a 100644
--- a/llvm/test/CodeGen/LoongArch/float-fma.ll
+++ b/llvm/test/CodeGen/LoongArch/float-fma.ll
@@ -236,13 +236,15 @@ define float @fnmsub_s(float %a, float %b, float %c) nounwind {
 ; LA32-CONTRACT-ON-LABEL: fnmsub_s:
 ; LA32-CONTRACT-ON:       # %bb.0:
 ; LA32-CONTRACT-ON-NEXT:    fmul.s $fa0, $fa0, $fa1
-; LA32-CONTRACT-ON-NEXT:    fsub.s $fa0, $fa2, $fa0
+; LA32-CONTRACT-ON-NEXT:    fsub.s $fa0, $fa0, $fa2
+; LA32-CONTRACT-ON-NEXT:    fneg.s $fa0, $fa0
 ; LA32-CONTRACT-ON-NEXT:    ret
 ;
 ; LA32-CONTRACT-OFF-LABEL: fnmsub_s:
 ; LA32-CONTRACT-OFF:       # %bb.0:
 ; LA32-CONTRACT-OFF-NEXT:    fmul.s $fa0, $fa0, $fa1
-; LA32-CONTRACT-OFF-NEXT:    fsub.s $fa0, $fa2, $fa0
+; LA32-CONTRACT-OFF-NEXT:    fsub.s $fa0, $fa0, $fa2
+; LA32-CONTRACT-OFF-NEXT:    fneg.s $fa0, $fa0
 ; LA32-CONTRACT-OFF-NEXT:    ret
 ;
 ; LA64-CONTRACT-FAST-LABEL: fnmsub_s:
@@ -253,12 +255,98 @@ define float @fnmsub_s(float %a, float %b, float %c) nounwind {
 ; LA64-CONTRACT-ON-LABEL: fnmsub_s:
 ; LA64-CONTRACT-ON:       # %bb.0:
 ; LA64-CONTRACT-ON-NEXT:    fmul.s $fa0, $fa0, $fa1
-; LA64-CONTRACT-ON-NEXT:    fsub.s $fa0, $fa2, $fa0
+; LA64-CONTRACT-ON-NEXT:    fsub.s $fa0, $fa0, $fa2
+; LA64-CONTRACT-ON-NEXT:    fneg.s $fa0, $fa0
 ; LA64-CONTRACT-ON-NEXT:    ret
 ;
 ; LA64-CONTRACT-OFF-LABEL: fnmsub_s:
 ; LA64-CONTRACT-OFF:       # %bb.0:
 ; LA64-CONTRACT-OFF-NEXT:    fmul.s $fa0, $fa0, $fa1
+; LA64-CONTRACT-OFF-NEXT:    fsub.s $fa0, $fa0, $fa2
+; LA64-CONTRACT-OFF-NEXT:    fneg.s $fa0, $fa0
+; LA64-CONTRACT-OFF-NEXT:    ret
+  %negc = fneg float %c
+  %mul = fmul float %a, %b
+  %add = fadd float %mul, %negc
+  %neg = fneg float %add
+  ret float %neg
+}
+
+define float @fnmsub_s_nsz(float %a, float %b, float %c) nounwind {
+; LA32-CONTRACT-FAST-LABEL: fnmsub_s_nsz:
+; LA32-CONTRACT-FAST:       # %bb.0:
+; LA32-CONTRACT-FAST-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-FAST-NEXT:    ret
+;
+; LA32-CONTRACT-ON-LABEL: fnmsub_s_nsz:
+; LA32-CONTRACT-ON:       # %bb.0:
+; LA32-CONTRACT-ON-NEXT:    fmul.s $fa0, $fa0, $fa1
+; LA32-CONTRACT-ON-NEXT:    fsub.s $fa0, $fa2, $fa0
+; LA32-CONTRACT-ON-NEXT:    ret
+;
+; LA32-CONTRACT-OFF-LABEL: fnmsub_s_nsz:
+; LA32-CONTRACT-OFF:       # %bb.0:
+; LA32-CONTRACT-OFF-NEXT:    fmul.s $fa0, $fa0, $fa1
+; LA32-CONTRACT-OFF-NEXT:    fsub.s $fa0, $fa2, $fa0
+; LA32-CONTRACT-OFF-NEXT:    ret
+;
+; LA64-CONTRACT-FAST-LABEL: fnmsub_s_nsz:
+; LA64-CONTRACT-FAST:       # %bb.0:
+; LA64-CONTRACT-FAST-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-FAST-NEXT:    ret
+;
+; LA64-CONTRACT-ON-LABEL: fnmsub_s_nsz:
+; LA64-CONTRACT-ON:       # %bb.0:
+; LA64-CONTRACT-ON-NEXT:    fmul.s $fa0, $fa0, $fa1
+; LA64-CONTRACT-ON-NEXT:    fsub.s $fa0, $fa2, $fa0
+; LA64-CONTRACT-ON-NEXT:    ret
+;
+; LA64-CONTRACT-OFF-LABEL: fnmsub_s_nsz:
+; LA64-CONTRACT-OFF:       # %bb.0:
+; LA64-CONTRACT-OFF-NEXT:    fmul.s $fa0, $fa0, $fa1
+; LA64-CONTRACT-OFF-NEXT:    fsub.s $fa0, $fa2, $fa0
+; LA64-CONTRACT-OFF-NEXT:    ret
+  %nega = fneg nsz float %a
+  %mul = fmul nsz float %nega, %b
+  %add = fadd nsz float %mul, %c
+  ret float %add
+}
+
+;; Check that fnmsub.s is not emitted.
+define float @not_fnmsub_s(float %a, float %b, float %c) nounwind {
+; LA32-CONTRACT-FAST-LABEL: not_fnmsub_s:
+; LA32-CONTRACT-FAST:       # %bb.0:
+; LA32-CONTRACT-FAST-NEXT:    fneg.s $fa0, $fa0
+; LA32-CONTRACT-FAST-NEXT:    fmadd.s $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-FAST-NEXT:    ret
+;
+; LA32-CONTRACT-ON-LABEL: not_fnmsub_s:
+; LA32-CONTRACT-ON:       # %bb.0:
+; LA32-CONTRACT-ON-NEXT:    fmul.s $fa0, $fa0, $fa1
+; LA32-CONTRACT-ON-NEXT:    fsub.s $fa0, $fa2, $fa0
+; LA32-CONTRACT-ON-NEXT:    ret
+;
+; LA32-CONTRACT-OFF-LABEL: not_fnmsub_s:
+; LA32-CONTRACT-OFF:       # %bb.0:
+; LA32-CONTRACT-OFF-NEXT:    fmul.s $fa0, $fa0, $fa1
+; LA32-CONTRACT-OFF-NEXT:    fsub.s $fa0, $fa2, $fa0
+; LA32-CONTRACT-OFF-NEXT:    ret
+;
+; LA64-CONTRACT-FAST-LABEL: not_fnmsub_s:
+; LA64-CONTRACT-FAST:       # %bb.0:
+; LA64-CONTRACT-FAST-NEXT:    fneg.s $fa0, $fa0
+; LA64-CONTRACT-FAST-NEXT:    fmadd.s $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-FAST-NEXT:    ret
+;
+; LA64-CONTRACT-ON-LABEL: not_fnmsub_s:
+; LA64-CONTRACT-ON:       # %bb.0:
+; LA64-CONTRACT-ON-NEXT:    fmul.s $fa0, $fa0, $fa1
+; LA64-CONTRACT-ON-NEXT:    fsub.s $fa0, $fa2, $fa0
+; LA64-CONTRACT-ON-NEXT:    ret
+;
+; LA64-CONTRACT-OFF-LABEL: not_fnmsub_s:
+; LA64-CONTRACT-OFF:       # %bb.0:
+; LA64-CONTRACT-OFF-NEXT:    fmul.s $fa0, $fa0, $fa1
 ; LA64-CONTRACT-OFF-NEXT:    fsub.s $fa0, $fa2, $fa0
 ; LA64-CONTRACT-OFF-NEXT:    ret
   %nega = fneg float %a
@@ -483,6 +571,86 @@ define float @contract_fnmsub_s(float %a, float %b, float %c) nounwind {
 ; LA64-CONTRACT-OFF-LABEL: contract_fnmsub_s:
 ; LA64-CONTRACT-OFF:       # %bb.0:
 ; LA64-CONTRACT-OFF-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-OFF-NEXT:    ret
+  %negc = fneg contract float %c
+  %mul = fmul contract float %a, %b
+  %add = fadd contract float %mul, %negc
+  %neg = fneg contract float %add
+  ret float %neg
+}
+
+define float @contract_fnmsub_s_nsz(float %a, float %b, float %c) nounwind {
+; LA32-CONTRACT-FAST-LABEL: contract_fnmsub_s_nsz:
+; LA32-CONTRACT-FAST:       # %bb.0:
+; LA32-CONTRACT-FAST-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-FAST-NEXT:    ret
+;
+; LA32-CONTRACT-ON-LABEL: contract_fnmsub_s_nsz:
+; LA32-CONTRACT-ON:       # %bb.0:
+; LA32-CONTRACT-ON-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-ON-NEXT:    ret
+;
+; LA32-CONTRACT-OFF-LABEL: contract_fnmsub_s_nsz:
+; LA32-CONTRACT-OFF:       # %bb.0:
+; LA32-CONTRACT-OFF-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-OFF-NEXT:    ret
+;
+; LA64-CONTRACT-FAST-LABEL: contract_fnmsub_s_nsz:
+; LA64-CONTRACT-FAST:       # %bb.0:
+; LA64-CONTRACT-FAST-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-FAST-NEXT:    ret
+;
+; LA64-CONTRACT-ON-LABEL: contract_fnmsub_s_nsz:
+; LA64-CONTRACT-ON:       # %bb.0:
+; LA64-CONTRACT-ON-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-ON-NEXT:    ret
+;
+; LA64-CONTRACT-OFF-LABEL: contract_fnmsub_s_nsz:
+; LA64-CONTRACT-OFF:       # %bb.0:
+; LA64-CONTRACT-OFF-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-OFF-NEXT:    ret
+  %nega = fneg contract nsz float %a
+  %mul = fmul contract nsz float %nega, %b
+  %add = fadd contract nsz float %mul, %c
+  ret float %add
+}
+
+;; Check that fnmsub.s is not emitted.
+define float @not_contract_fnmsub_s(float %a, float %b, float %c) nounwind {
+; LA32-CONTRACT-FAST-LABEL: not_contract_fnmsub_s:
+; LA32-CONTRACT-FAST:       # %bb.0:
+; LA32-CONTRACT-FAST-NEXT:    fneg.s $fa0, $fa0
+; LA32-CONTRACT-FAST-NEXT:    fmadd.s $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-FAST-NEXT:    ret
+;
+; LA32-CONTRACT-ON-LABEL: not_contract_fnmsub_s:
+; LA32-CONTRACT-ON:       # %bb.0:
+; LA32-CONTRACT-ON-NEXT:    fneg.s $fa0, $fa0
+; LA32-CONTRACT-ON-NEXT:    fmadd.s $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-ON-NEXT:    ret
+;
+; LA32-CONTRACT-OFF-LABEL: not_contract_fnmsub_s:
+; LA32-CONTRACT-OFF:       # %bb.0:
+; LA32-CONTRACT-OFF-NEXT:    fneg.s $fa0, $fa0
+; LA32-CONTRACT-OFF-NEXT:    fmadd.s $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-OFF-NEXT:    ret
+;
+; LA64-CONTRACT-FAST-LABEL: not_contract_fnmsub_s:
+; LA64-CONTRACT-FAST:       # %bb.0:
+; LA64-CONTRACT-FAST-NEXT:    fneg.s $fa0, $fa0
+; LA64-CONTRACT-FAST-NEXT:    fmadd.s $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-FAST-NEXT:    ret
+;
+; LA64-CONTRACT-ON-LABEL: not_contract_fnmsub_s:
+; LA64-CONTRACT-ON:       # %bb.0:
+; LA64-CONTRACT-ON-NEXT:    fneg.s $fa0, $fa0
+; LA64-CONTRACT-ON-NEXT:    fmadd.s $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-ON-NEXT:    ret
+;
+; LA64-CONTRACT-OFF-LABEL: not_contract_fnmsub_s:
+; LA64-CONTRACT-OFF:       # %bb.0:
+; LA64-CONTRACT-OFF-NEXT:    fneg.s $fa0, $fa0
+; LA64-CONTRACT-OFF-NEXT:    fmadd.s $fa0, $fa0, $fa1, $fa2
 ; LA64-CONTRACT-OFF-NEXT:    ret
   %nega = fneg contract float %a
   %mul = fmul contract float %nega, %b
@@ -592,8 +760,8 @@ define float @fnmadd_s_intrinsics(float %a, float %b, float %c) nounwind {
 ; LA64-CONTRACT-OFF-NEXT:    fnmadd.s $fa0, $fa0, $fa1, $fa2
 ; LA64-CONTRACT-OFF-NEXT:    ret
   %fma = call float @llvm.fma.f64(float %a, float %b, float %c)
-  %neg = fneg float %fma
-  ret float %neg
+  %negfma = fneg float %fma
+  ret float %negfma
 }
 
 define float @fnmadd_s_nsz_intrinsics(float %a, float %b, float %c) nounwind {
@@ -704,44 +872,87 @@ define float @fnmsub_s_intrinsics(float %a, float %b, float %c) nounwind {
 ; LA64-CONTRACT-OFF-LABEL: fnmsub_s_intrinsics:
 ; LA64-CONTRACT-OFF:       # %bb.0:
 ; LA64-CONTRACT-OFF-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-OFF-NEXT:    ret
+  %negc = fneg float %c
+  %fma = call float @llvm.fma.f64(float %a, float %b, float %negc)
+  %negfma = fneg float %fma
+  ret float %negfma
+}
+
+define float @fnmsub_s_nsz_intrinsics(float %a, float %b, float %c) nounwind {
+; LA32-CONTRACT-FAST-LABEL: fnmsub_s_nsz_intrinsics:
+; LA32-CONTRACT-FAST:       # %bb.0:
+; LA32-CONTRACT-FAST-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-FAST-NEXT:    ret
+;
+; LA32-CONTRACT-ON-LABEL: fnmsub_s_nsz_intrinsics:
+; LA32-CONTRACT-ON:       # %bb.0:
+; LA32-CONTRACT-ON-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-ON-NEXT:    ret
+;
+; LA32-CONTRACT-OFF-LABEL: fnmsub_s_nsz_intrinsics:
+; LA32-CONTRACT-OFF:       # %bb.0:
+; LA32-CONTRACT-OFF-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
+; LA32-CONTRACT-OFF-NEXT:    ret
+;
+; LA64-CONTRACT-FAST-LABEL: fnmsub_s_nsz_intrinsics:
+; LA64-CONTRACT-FAST:       # %bb.0:
+; LA64-CONTRACT-FAST-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-FAST-NEXT:    ret
+;
+; LA64-CONTRACT-ON-LABEL: fnmsub_s_nsz_intrinsics:
+; LA64-CONTRACT-ON:       # %bb.0:
+; LA64-CONTRACT-ON-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
+; LA64-CONTRACT-ON-NEXT:    ret
+;
+; LA64-CONTRACT-OFF-LABEL: fnmsub_s_nsz_intrinsics:
+; LA64-CONTRACT-OFF:       # %bb.0:
+; LA64-CONTRACT-OFF-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
 ; LA64-CONTRACT-OFF-NEXT:    ret
   %nega = fneg float %a
-  %fma = call float @llvm.fma.f64(float %nega, float %b, float %c)
+  %fma = call nsz float @llvm.fma.f64(float %nega, float %b, float %c)
   ret float %fma
 }
 
-define float @fnmsub_s_swap_intrinsics(float %a, float %b, float %c) nounwind {
-; LA32-CONTRACT-FAST-LABEL: fnmsub_s_swap_intrinsics:
+;; Check that fnmsub.s is not emitted.
+define float @not_fnmsub_s_intrinsics(float %a, float %b, float %c) nounwind {
+; LA32-CONTRACT-FAST-LABEL: not_fnmsub_s_intrinsics:
 ; LA32-CONTRACT-FAST:       # %bb.0:
-; LA32-CONTRACT-FAST-NEXT:    fnmsub.s $fa0, $fa1, $fa0, $fa2
+; LA32-CONTRACT-FAST-NEXT:    fneg.s $fa0, $fa0
+; LA32-CONTRACT-FAST-NEXT:    fmadd.s $fa0, $fa0, $fa1, $fa2
 ; LA32-CONTRACT-FAST-NEXT:    ret
 ;
-; LA32-CONTRACT-ON-LABEL: fnmsub_s_swap_intrinsics:
+; LA32-CONTRACT-ON-LABEL: not_fnmsub_s_intrinsics:
 ; LA32-CONTRACT-ON:       # %bb.0:
-; LA32-CONTRACT-ON-NEXT:    fnmsub.s $fa0, $fa1, $fa0, $fa2
+; LA32-CONTRACT-ON-NEXT:    fneg.s $fa0, $fa0
+; LA32-CONTRACT-ON-NEXT:    fmadd.s $fa0, $fa0, $fa1, $fa2
 ; LA32-CONTRACT-ON-NEXT:    ret
 ;
-; LA32-CONTRACT-OFF-LABEL: fnmsub_s_swap_intrinsics:
+; LA32-CONTRACT-OFF-LABEL: not_fnmsub_s_intrinsics:
 ; LA32-CONTRACT-OFF:       # %bb.0:
-; LA32-CONTRACT-OFF-NEXT:    fnmsub.s $fa0, $fa1, $fa0, $fa2
+; LA32-CONTRACT-OFF-NEXT:    fneg.s $fa0, $fa0
+; LA32-CONTRACT-OFF-NEXT:    fmadd.s $fa0, $fa0, $fa1, $fa2
 ; LA32-CONTRACT-OFF-NEXT:    ret
 ;
-; LA64-CONTRACT-FAST-LABEL: fnmsub_s_swap_intrinsics:
+; LA64-CONTRACT-FAST-LABEL: not_fnmsub_s_intrinsics:
 ; LA64-CONTRACT-FAST:       # %bb.0:
-; LA64-CONTRACT-FAST-NEXT:    fnmsub.s $fa0, $fa1, $fa0, $fa2
+; LA64-CONTRACT-FAST-NEXT:    fneg.s $fa0, $fa0
+; LA64-CONTRACT-FAST-NEXT:    fmadd.s $fa0, $fa0, $fa1, $fa2
 ; LA64-CONTRACT-FAST-NEXT:    ret
 ;
-; LA64-CONTRACT-ON-LABEL: fnmsub_s_swap_intrinsics:
+; LA64-CONTRACT-ON-LABEL: not_fnmsub_s_intrinsics:
 ; LA64-CONTRACT-ON:       # %bb.0:
-; LA64-CONTRACT-ON-NEXT:    fnmsub.s $fa0, $fa1, $fa0, $fa2
+; LA64-CONTRACT-ON-NEXT:    fneg.s $fa0, $fa0
+; LA64-CONTRACT-ON-NEXT:    fmadd.s $fa0, $fa0, $fa1, $fa2
 ; LA64-CONTRACT-ON-NEXT:    ret
 ;
-; LA64-CONTRACT-OFF-LABEL: fnmsub_s_swap_intrinsics:
+; LA64-CONTRACT-OFF-LABEL: not_fnmsub_s_intrinsics:
 ; LA64-CONTRACT-OFF:       # %bb.0:
-; LA64-CONTRACT-OFF-NEXT:    fnmsub.s $fa0, $fa1, $fa0, $fa2
+; LA64-CONTRACT-OFF-NEXT:    fneg.s $fa0, $fa0
+; LA64-CONTRACT-OFF-NEXT:    fmadd.s $fa0, $fa0, $fa1, $fa2
 ; LA64-CONTRACT-OFF-NEXT:    ret
-  %negb = fneg float %b
-  %fma = call float @llvm.fma.f64(float %a, float %negb, float %c)
+  %nega = fneg float %a
+  %fma = call float @llvm.fma.f64(float %nega, float %b, float %c)
   ret float %fma
 }
 
@@ -882,6 +1093,8 @@ define float @fnmsub_s_contract(float %a, float %b, float %c) nounwind {
 ; LA64-CONTRACT-OFF-NEXT:    fnmsub.s $fa0, $fa0, $fa1, $fa2
 ; LA64-CONTRACT-OFF-NEXT:    ret
   %mul = fmul contract float %a, %b
-  %sub = fsub contract float %c, %mul
-  ret float %sub
+  %negc = fneg contract float %c
+  %add = fadd contract float %negc, %mul
+  %negadd = fneg contract float %add
+  ret float %negadd
 }
-- 
2.20.1


From 7a3bd125d9c1d0265b265ce238a88d0d4550e5a0 Mon Sep 17 00:00:00 2001
From: Weining Lu <luweining@loongson.cn>
Date: Wed, 3 Jan 2024 13:59:12 +0800
Subject: [PATCH 13/14] [LoongArch] Fix the procossor series mask

Refer PRID_SERIES_MASK definition in linux kernel:
arch/loongarch/include/asm/cpu.h.

(cherry picked from commit 7e186d366d6c7def0543acc255931f617e76dff0)
---
 llvm/lib/TargetParser/Host.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/TargetParser/Host.cpp b/llvm/lib/TargetParser/Host.cpp
index 81309280a44b..d11dc605e188 100644
--- a/llvm/lib/TargetParser/Host.cpp
+++ b/llvm/lib/TargetParser/Host.cpp
@@ -1462,7 +1462,8 @@ StringRef sys::getHostCPUName() {
   // Use processor id to detect cpu name.
   uint32_t processor_id;
   __asm__("cpucfg %[prid], $zero\n\t" : [prid] "=r"(processor_id));
-  switch (processor_id & 0xff00) {
+  // Refer PRID_SERIES_MASK in linux kernel: arch/loongarch/include/asm/cpu.h.
+  switch (processor_id & 0xf000) {
   case 0xc000: // Loongson 64bit, 4-issue
     return "la464";
   // TODO: Others.
-- 
2.20.1


From 3634ac4cbc475509c46521f5b8a3fcbeca6d06c7 Mon Sep 17 00:00:00 2001
From: wanglei <wanglei@loongson.cn>
Date: Mon, 11 Mar 2024 08:59:17 +0800
Subject: [PATCH 14/14] [LoongArch] Make sure that the LoongArchISD::BSTRINS
 node uses the correct `MSB` value (#84454)

The `MSB` must not be greater than `GRLen`. Without this patch, newly
added test cases will crash with LoongArch32, resulting in a 'cannot
select' error.

(cherry picked from commit edd4c6c6dca4c556de22b2ab73d5bfc02d28e59b)
(cherry picked from commit d77c5c3830d925b3795e2f1535a6568399fe6626)
---
 llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp |  4 +++-
 llvm/test/CodeGen/LoongArch/bstrins_w.ll            | 13 +++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp b/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
index ed106cb766bc..5affaf37ad5a 100644
--- a/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
+++ b/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
@@ -2310,7 +2310,9 @@ Retry:
     return DAG.getNode(
         LoongArchISD::BSTRINS, DL, ValTy, N0.getOperand(0),
         DAG.getConstant(CN1->getSExtValue() >> MaskIdx0, DL, ValTy),
-        DAG.getConstant((MaskIdx0 + MaskLen0 - 1), DL, GRLenVT),
+        DAG.getConstant(ValBits == 32 ? (MaskIdx0 + (MaskLen0 & 31) - 1)
+                                      : (MaskIdx0 + MaskLen0 - 1),
+                        DL, GRLenVT),
         DAG.getConstant(MaskIdx0, DL, GRLenVT));
   }
 
diff --git a/llvm/test/CodeGen/LoongArch/bstrins_w.ll b/llvm/test/CodeGen/LoongArch/bstrins_w.ll
index dfbe000841cd..e008caacad2a 100644
--- a/llvm/test/CodeGen/LoongArch/bstrins_w.ll
+++ b/llvm/test/CodeGen/LoongArch/bstrins_w.ll
@@ -145,6 +145,19 @@ define i32 @pat5(i32 %a) nounwind {
   ret i32 %or
 }
 
+;; The high bits of `const` are zero.
+define i32 @pat5_high_zeros(i32 %a) nounwind {
+; CHECK-LABEL: pat5_high_zeros:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    lu12i.w $a1, 1
+; CHECK-NEXT:    ori $a1, $a1, 564
+; CHECK-NEXT:    bstrins.w $a0, $a1, 31, 16
+; CHECK-NEXT:    ret
+  %and = and i32 %a, 65535      ; 0x0000ffff
+  %or = or i32 %and, 305397760  ; 0x12340000
+  ret i32 %or
+}
+
 ;; Pattern 6: a = b | ((c & mask) << shamt)
 ;; In this testcase b is 0x10000002, but in fact we do not require b being a
 ;; constant. As long as all positions in b to be overwritten by the incoming
-- 
2.20.1