forked from OSchip/llvm-project
31 lines
644 B
LLVM
31 lines
644 B
LLVM
; RUN: opt < %s -ipsccp -S | FileCheck %s
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; This transformation is safe for atomic loads and stores; check that it works.
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@G = internal global i32 17
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@C = internal constant i32 222
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define i32 @test1() {
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%V = load atomic i32* @G seq_cst, align 4
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%C = icmp eq i32 %V, 17
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br i1 %C, label %T, label %F
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T:
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store atomic i32 17, i32* @G seq_cst, align 4
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ret i32 %V
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F:
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store atomic i32 123, i32* @G seq_cst, align 4
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ret i32 0
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}
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; CHECK: define i32 @test1
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; CHECK-NOT: store
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; CHECK: ret i32 17
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define i32 @test2() {
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%V = load atomic i32* @C seq_cst, align 4
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ret i32 %V
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}
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; CHECK: define i32 @test2
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; CHECK-NOT: load
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; CHECK: ret i32 222
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