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-rw-r--r--src/cmd/compile/internal/ssa/gen/RISCV64.rules2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/cmd/compile/internal/ssa/gen/RISCV64.rules b/src/cmd/compile/internal/ssa/gen/RISCV64.rules
index 7aea622c5e..acef3df389 100644
--- a/src/cmd/compile/internal/ssa/gen/RISCV64.rules
+++ b/src/cmd/compile/internal/ssa/gen/RISCV64.rules
@@ -568,7 +568,7 @@
(AtomicAnd32 ...) => (LoweredAtomicAnd32 ...)
-(AtomicCompareAndSwap32 ...) => (LoweredAtomicCas32 ...)
+(AtomicCompareAndSwap32 ptr old new mem) => (LoweredAtomicCas32 ptr (SignExt32to64 old) new mem)
(AtomicCompareAndSwap64 ...) => (LoweredAtomicCas64 ...)
(AtomicExchange32 ...) => (LoweredAtomicExchange32 ...)