22 lines
522 B
LLVM
22 lines
522 B
LLVM
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; RUN: opt < %s -instcombine -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | grep " = phi " | count 1
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; instcombine should sort the PHI operands so that simplifycfg can see the
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; duplicate and remove it.
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define i32 @foo(i1 %t) {
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entry:
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call void @bar()
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br i1 %t, label %true, label %false
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true:
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call void @bar()
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br label %false
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false:
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%a = phi i32 [ 2, %true ], [ 5, %entry ]
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%b = phi i32 [ 5, %entry ], [ 2, %true ]
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call void @bar()
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%c = add i32 %a, %b
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ret i32 %c
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}
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declare void @bar()
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