IR: add "cmpxchg weak" variant to support permitted failure.

[oota-llvm.git] / test / Transforms / LowerAtomic / atomic-swap.ll

diff --git a/test/Transforms/LowerAtomic/atomic-swap.ll b/test/Transforms/LowerAtomic/atomic-swap.ll
index c319834b6270caa22c41e1e37d290fbc38e30ee6..cb1124136f86aa452e2ae47daa33de79b3dd20a2 100644 (file)
--- a/test/Transforms/LowerAtomic/atomic-swap.ll
+++ b/test/Transforms/LowerAtomic/atomic-swap.ll
@@ -3,15 +3,20 @@
 define i8 @cmpswap() {
 ; CHECK-LABEL: @cmpswap(
   %i = alloca i8
-  %j = cmpxchg i8* %i, i8 0, i8 42 monotonic monotonic
-; CHECK: [[INST:%[a-z0-9]+]] = load
-; CHECK-NEXT: icmp
-; CHECK-NEXT: select
-; CHECK-NEXT: store
+  %pair = cmpxchg i8* %i, i8 0, i8 42 monotonic monotonic
+  %j = extractvalue { i8, i1 } %pair, 0
+; CHECK: [[OLDVAL:%[a-z0-9]+]] = load i8* [[ADDR:%[a-z0-9]+]]
+; CHECK-NEXT: [[SAME:%[a-z0-9]+]] = icmp eq i8 [[OLDVAL]], 0
+; CHECK-NEXT: [[TO_STORE:%[a-z0-9]+]] = select i1 [[SAME]], i8 42, i8 [[OLDVAL]]
+; CHECK-NEXT: store i8 [[TO_STORE]], i8* [[ADDR]]
+; CHECK-NEXT: [[TMP:%[a-z0-9]+]] = insertvalue { i8, i1 } undef, i8 [[OLDVAL]], 0
+; CHECK-NEXT: [[RES:%[a-z0-9]+]] = insertvalue { i8, i1 } [[TMP]], i1 [[SAME]], 1
+; CHECK-NEXT: [[VAL:%[a-z0-9]+]] = extractvalue { i8, i1 } [[RES]], 0
   ret i8 %j
-; CHECK: ret i8 [[INST]]
+; CHECK: ret i8 [[VAL]]
 }
 
+
 define i8 @swap() {
 ; CHECK-LABEL: @swap(
   %i = alloca i8