gcc/ChangeLog:
2020-04-16 Andre Vieira <andre.simoesdiasvie...@arm.com>
Backport from mainline.
2018-07-16 Ramana Radhakrishnan <ramana.radhakrish...@arm.com>
* config/aarch64/atomics.md (aarch64_store_execlusive<mode>): Add
early clobber.
diff --git a/gcc/config/aarch64/atomics.md b/gcc/config/aarch64/atomics.md
index
686e39ff2ee5940e9e93d0c2b802b46ff9f2c4e4..fba5ec6db5832a184b0323e62041f9c473761bae
100644
--- a/gcc/config/aarch64/atomics.md
+++ b/gcc/config/aarch64/atomics.md
@@ -530,7 +530,7 @@
)
(define_insn "aarch64_store_exclusive<mode>"
- [(set (match_operand:SI 0 "register_operand" "=r")
+ [(set (match_operand:SI 0 "register_operand" "=&r")
(unspec_volatile:SI [(const_int 0)] UNSPECV_SX))
(set (match_operand:ALLI 1 "aarch64_sync_memory_operand" "=Q")
(unspec_volatile:ALLI
