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From 59e07c6c77dcc92d274ca6156b8916f66035dce8 Mon Sep 17 00:00:00 2001
From: Haochen Jiang <haochen.jiang@intel.com>
Date: Mon, 22 Jul 2024 14:06:18 +0800
Subject: [PATCH 1/2] i386: Change prefetchi output template
For prefetchi instructions, RIP-relative address is explicitly mentioned
for operand and assembler obeys that rule strictly. This makes
instruction like:
prefetchit0 bar
got illegal for assembler, which should be a broad usage for prefetchi.
Change to %a to explicitly add (%rip) after function label to make it
legal in assembler so that it could pass to linker to get the real address.
gcc/ChangeLog:
* config/i386/i386.md (prefetchi): Change to %a.
gcc/testsuite/ChangeLog:
* gcc.target/i386/prefetchi-1.c: Check (%rip).
Reference:
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=
062e46a813799684c6f900815fd22451d6294ae1
---
gcc/config/i386/i386.md | 2 +-
gcc/testsuite/gcc.target/i386/prefetchi-1.c | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index f08c2cfb1..1b733008e 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -22917,7 +22917,7 @@
"TARGET_PREFETCHI && TARGET_64BIT"
{
static const char * const patterns[2] = {
- "prefetchit1\t%0", "prefetchit0\t%0"
+ "prefetchit1\t%a0", "prefetchit0\t%a0"
};
int locality = INTVAL (operands[1]);
diff --git a/gcc/testsuite/gcc.target/i386/prefetchi-1.c b/gcc/testsuite/gcc.target/i386/prefetchi-1.c
index 80f25e70e..03dfdc55e 100644
--- a/gcc/testsuite/gcc.target/i386/prefetchi-1.c
+++ b/gcc/testsuite/gcc.target/i386/prefetchi-1.c
@@ -1,7 +1,7 @@
/* { dg-do compile { target { ! ia32 } } } */
/* { dg-options "-mprefetchi -O2" } */
-/* { dg-final { scan-assembler-times "\[ \\t\]+prefetchit0\[ \\t\]+" 2 } } */
-/* { dg-final { scan-assembler-times "\[ \\t\]+prefetchit1\[ \\t\]+" 2 } } */
+/* { dg-final { scan-assembler-times "\[ \\t\]+prefetchit0\[ \\t\]+bar\\(%rip\\)" 2 } } */
+/* { dg-final { scan-assembler-times "\[ \\t\]+prefetchit1\[ \\t\]+bar\\(%rip\\)" 2 } } */
#include <x86intrin.h>
--
2.31.1
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