The split for movv8di is not ready to handle the case where the setting
register overlaps with the address of the memory that is being load.
Fixing the split than just making the output constraint as an early clobber
for this alternative. The split would first need to figure out which register
is overlapping with the address and then only emit that move last.
Build and tested for aarch64-linux-gnu with no regressions
gcc/ChangeLog:
* config/aarch64/aarch64-simd.md (*aarch64_movv8di): Mark the last
alternative's output constraint as an early clobber.
Signed-off-by: Andrew Pinski <quic_apin...@quicinc.com>
---
gcc/config/aarch64/aarch64-simd.md | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/config/aarch64/aarch64-simd.md
b/gcc/config/aarch64/aarch64-simd.md
index 662ef696630..ba079298b84 100644
--- a/gcc/config/aarch64/aarch64-simd.md
+++ b/gcc/config/aarch64/aarch64-simd.md
@@ -7985,7 +7985,7 @@ (define_insn "*aarch64_mov<mode>"
)
(define_insn "*aarch64_movv8di"
- [(set (match_operand:V8DI 0 "nonimmediate_operand" "=r,m,r")
+ [(set (match_operand:V8DI 0 "nonimmediate_operand" "=r,m,&r")
(match_operand:V8DI 1 "general_operand" " r,r,m"))]
"(register_operand (operands[0], V8DImode)
|| register_operand (operands[1], V8DImode))"
--
2.39.3
