1 files changed, 47 insertions, 0 deletions
diff --git a/0189-Backport-SME-aarch64-Only-calculate-chain_offset-if-.patch b/0189-Backport-SME-aarch64-Only-calculate-chain_offset-if-.patch
new file mode 100644
index 0000000..267b3ab
--- /dev/null
+++ b/0189-Backport-SME-aarch64-Only-calculate-chain_offset-if-.patch
@@ -0,0 +1,47 @@
+From c8768dd861538817db8c1955dcce4b6d8ce17c48 Mon Sep 17 00:00:00 2001
+From: Richard Sandiford <richard.sandiford@arm.com>
+Date: Tue, 12 Sep 2023 16:05:07 +0100
+Subject: [PATCH 090/157] [Backport][SME] aarch64: Only calculate chain_offset
+ if there is a chain
+
+Reference: https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=aa8b57ee0206e8e5ac7078692ee67fb6ead05645
+
+After previous patches, it is no longer necessary to calculate
+a chain_offset in cases where there is no chain record.
+
+gcc/
+	* config/aarch64/aarch64.cc (aarch64_expand_prologue): Move the
+	calculation of chain_offset into the emit_frame_chain block.
+---
+ gcc/config/aarch64/aarch64.cc | 10 +++++-----
+ 1 file changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc
+index a0a4c7ac3..bef6a658b 100644
+--- a/gcc/config/aarch64/aarch64.cc
++++ b/gcc/config/aarch64/aarch64.cc
+@@ -10357,16 +10357,16 @@ aarch64_expand_prologue (void)
+   if (callee_adjust != 0)
+     aarch64_push_regs (reg1, reg2, callee_adjust);
+ 
+-  /* The offset of the frame chain record (if any) from the current SP.  */
+-  poly_int64 chain_offset = (initial_adjust + callee_adjust
+-			     - frame.hard_fp_offset);
+-  gcc_assert (known_ge (chain_offset, 0));
+-
+   /* The offset of the current SP from the bottom of the static frame.  */
+   poly_int64 bytes_below_sp = frame_size - initial_adjust - callee_adjust;
+ 
+   if (emit_frame_chain)
+     {
++      /* The offset of the frame chain record (if any) from the current SP.  */
++      poly_int64 chain_offset = (initial_adjust + callee_adjust
++				 - frame.hard_fp_offset);
++      gcc_assert (known_ge (chain_offset, 0));
++
+       if (callee_adjust == 0)
+ 	{
+ 	  reg1 = R29_REGNUM;
+-- 
+2.33.0
+