26 lines
535 B
LLVM
26 lines
535 B
LLVM
; RUN: opt < %s -basicaa -gvn -S | FileCheck %s
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define i32 @main(i32** %p, i32 %x, i32 %y) {
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block1:
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%cmp = icmp eq i32 %x, %y
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br i1 %cmp , label %block2, label %block3
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block2:
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%a = load i32*, i32** %p
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br label %block4
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block3:
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%b = load i32*, i32** %p
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br label %block4
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block4:
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; CHECK-NOT: %existingPHI = phi
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; CHECK: %DEAD = phi
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%existingPHI = phi i32* [ %a, %block2 ], [ %b, %block3 ]
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%DEAD = load i32*, i32** %p
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%c = load i32, i32* %DEAD
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%d = load i32, i32* %existingPHI
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%e = add i32 %c, %d
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ret i32 %e
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}
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