forked from OSchip/llvm-project
43 lines
1.3 KiB
LLVM
43 lines
1.3 KiB
LLVM
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; PR32952: Don't erroneously consider congruent two phi nodes which
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; have the same arguments but different incoming edges.
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; RUN: opt -newgvn -S %s | FileCheck %s
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@a = common global i16 0, align 2
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@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1
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define i32 @tinkywinky() {
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entry:
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%0 = load i16, i16* @a, align 2
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%conv = sext i16 %0 to i32
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%neg = xor i32 %conv, -1
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%conv1 = trunc i32 %neg to i16
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%conv3 = zext i16 %conv1 to i32
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%cmp = icmp slt i32 %conv, %conv3
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br i1 %cmp, label %tinky, label %winky
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tinky:
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store i16 2, i16* @a, align 2
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br label %patatino
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winky:
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br label %patatino
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patatino:
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; CHECK: %meh = phi i16 [ %0, %winky ], [ %conv1, %tinky ]
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; CHECK: %banana = phi i16 [ %0, %tinky ], [ %conv1, %winky ]
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%meh = phi i16 [ %0, %winky ], [ %conv1, %tinky ]
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%banana = phi i16 [ %0, %tinky ], [ %conv1, %winky ]
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br label %end
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end:
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; CHECK: %promoted = zext i16 %banana to i32
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; CHECK: %other = zext i16 %meh to i32
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%promoted = zext i16 %banana to i32
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%other = zext i16 %meh to i32
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%first = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %promoted)
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%second = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %other)
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ret i32 0
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}
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declare i32 @printf(i8*, ...)
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