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23 lines
613 B
23 lines
613 B
4 months ago
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; Mem2reg should not insert dead PHI nodes! The naive algorithm inserts a PHI
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; node in L3, even though there is no load of %A in anything dominated by L3.
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; RUN: opt < %s -mem2reg -S | not grep phi
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define void @test(i32 %B, i1 %C) {
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%A = alloca i32 ; <i32*> [#uses=4]
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store i32 %B, i32* %A
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br i1 %C, label %L1, label %L2
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L1: ; preds = %0
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store i32 %B, i32* %A
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%D = load i32, i32* %A ; <i32> [#uses=1]
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call void @test( i32 %D, i1 false )
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br label %L3
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L2: ; preds = %0
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%E = load i32, i32* %A ; <i32> [#uses=1]
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call void @test( i32 %E, i1 true )
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br label %L3
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L3: ; preds = %L2, %L1
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ret void
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}
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