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3e054fe9ef
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81257 91177308-0d34-0410-b5e6-96231b3b80d8
47 lines
966 B
LLVM
47 lines
966 B
LLVM
; RUN: opt < %s -condprop -S | not grep phi
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declare i1 @foo()
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define i32 @test(i32 %C) {
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%Val = call i1 @foo( ) ; <i1> [#uses=2]
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switch i32 %C, label %T1 [
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i32 4, label %T2
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i32 17, label %T3
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]
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T1: ; preds = %0
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call void @a( )
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br label %Cont
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T2: ; preds = %0
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call void @b( )
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br label %Cont
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T3: ; preds = %0
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call void @c( )
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br label %Cont
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Cont: ; preds = %T3, %T2, %T1
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;; PHI becomes dead after threading T2
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%C2 = phi i1 [ %Val, %T1 ], [ true, %T2 ], [ %Val, %T3 ] ; <i1> [#uses=1]
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br i1 %C2, label %L2, label %F2
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L2: ; preds = %Cont
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call void @d( )
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ret i32 17
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F2: ; preds = %Cont
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call void @e( )
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ret i32 1
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}
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declare void @a()
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declare void @b()
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declare void @c()
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declare void @d()
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declare void @e()
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