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* [gcc(refs/vendors/ARM/heads/morello)] morello: Fix eh_return handler in the AArch64 backend
@ 2021-12-10 16:49 Matthew Malcomson
0 siblings, 0 replies; only message in thread
From: Matthew Malcomson @ 2021-12-10 16:49 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:d90ad4654b5270598a9e483cd47a739eacde8eeb
commit d90ad4654b5270598a9e483cd47a739eacde8eeb
Author: Stam Markianos-Wright <stam.markianos-wright@arm.com>
Date: Tue Nov 2 10:33:26 2021 +0000
morello: Fix eh_return handler in the AArch64 backend
A small patch to fix a piece of incorrect codegen that was
assuming 64-bit sized values.
The MEM generated here with `gen_frame_mem` should have an
address of "hard_frame_pointer_rtx + 1 pointer-sized value",
which for capabilities now is 128 bits.
Diff:
---
gcc/config/aarch64/aarch64.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 273b6de882f..b77d05db2da 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -8927,7 +8927,7 @@ aarch64_expand_epilogue (bool for_sibcall)
emit_insn (gen_add2_insn (stack_pointer_rtx, EH_RETURN_STACKADJ_RTX));
}
- emit_use (gen_rtx_REG (DImode, LR_REGNUM));
+ emit_use (gen_rtx_REG (Pmode, LR_REGNUM));
if (!for_sibcall)
emit_jump_insn (ret_rtx);
}
@@ -8961,7 +8961,7 @@ rtx
aarch64_eh_return_handler_rtx (void)
{
rtx tmp = gen_frame_mem (Pmode,
- plus_constant (Pmode, hard_frame_pointer_rtx, UNITS_PER_WORD));
+ plus_constant (Pmode, hard_frame_pointer_rtx, GET_MODE_SIZE (Pmode)));
/* Mark the store volatile, so no optimization is permitted to remove it. */
MEM_VOLATILE_P (tmp) = true;
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2021-12-10 16:49 [gcc(refs/vendors/ARM/heads/morello)] morello: Fix eh_return handler in the AArch64 backend Matthew Malcomson
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