38 lines
880 B
LLVM
38 lines
880 B
LLVM
; RUN: opt < %s -simplifycfg -S | FileCheck %s
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; This test checks that the SimplifyCFG pass won't duplicate a call to a
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; function marked noduplicate.
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;
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; CHECK-LABEL: @noduplicate
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; CHECK: call void @barrier
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; CHECK-NOT: call void @barrier
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define void @noduplicate(i32 %cond, i32* %out) {
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entry:
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%out1 = getelementptr i32, i32* %out, i32 1
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%out2 = getelementptr i32, i32* %out, i32 2
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%cmp = icmp eq i32 %cond, 0
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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store i32 5, i32* %out
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br label %if.end
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if.end:
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call void @barrier() #0
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br i1 %cmp, label %cond.end, label %cond.false
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cond.false:
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store i32 5, i32* %out1
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br label %cond.end
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cond.end:
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%value = phi i32 [ 1, %cond.false ], [ 0, %if.end ]
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store i32 %value, i32* %out2
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ret void
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}
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; Function Attrs: noduplicate nounwind
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declare void @barrier() #0
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attributes #0 = { noduplicate nounwind }
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