forked from OSchip/llvm-project
20 lines
467 B
LLVM
20 lines
467 B
LLVM
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; This test shows a case where SCCP is incorrectly eliminating the PHI node
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; because it thinks it has a constant 0 value, when it really doesn't.
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; RUN: opt < %s -sccp -S | grep phi
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define i32 @test(i32 %A, i1 %c) {
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bb1:
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br label %BB2
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BB2: ; preds = %BB4, %bb1
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%V = phi i32 [ 0, %bb1 ], [ %A, %BB4 ] ; <i32> [#uses=1]
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br label %BB3
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BB3: ; preds = %BB2
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br i1 %c, label %BB4, label %BB5
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BB4: ; preds = %BB3
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br label %BB2
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BB5: ; preds = %BB3
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ret i32 %V
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}
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