38 lines
886 B
LLVM
38 lines
886 B
LLVM
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; RUN: opt < %s -globals-aa -gvn -S | FileCheck %s
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@X = internal global i32 4
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define i32 @test_cmpxchg(i32* %P) {
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; CHECK-LABEL: @test_cmpxchg
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; CHECK-NEXT: store i32 12, i32* @X
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; CHECK-NEXT: call void @modrefX_cmpxchg()
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; CHECK-NEXT: %V = load i32, i32* @X
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; CHECK-NEXT: ret i32 %V
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store i32 12, i32* @X
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call void @modrefX_cmpxchg()
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%V = load i32, i32* @X
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ret i32 %V
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}
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define void @modrefX_cmpxchg() {
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%1 = cmpxchg i32* @X, i32 0, i32 -1 monotonic monotonic
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ret void
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}
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define i32 @test_atomicrmw(i32* %P) {
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; CHECK-LABEL: @test_atomicrmw
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; CHECK-NEXT: store i32 12, i32* @X
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; CHECK-NEXT: call void @modrefXatomicrmw()
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; CHECK-NEXT: %V = load i32, i32* @X
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; CHECK-NEXT: ret i32 %V
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store i32 12, i32* @X
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call void @modrefXatomicrmw()
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%V = load i32, i32* @X
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ret i32 %V
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}
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define void @modrefXatomicrmw() {
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%1 = atomicrmw add i32* @X, i32 1 acquire
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ret void
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}
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