forked from OSchip/llvm-project
25 lines
548 B
LLVM
25 lines
548 B
LLVM
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; RUN: opt -jump-threading -disable-output %s
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; PR9112
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; This is actually a test for value tracking. Jump threading produces
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; "%phi = phi i16" when it removes all edges leading to %unreachable.
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; The .ll parser won't let us write that directly since it's invalid code.
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define void @func() nounwind {
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entry:
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br label %bb
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bb:
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br label %bb
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unreachable:
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%phi = phi i16 [ %add, %unreachable ], [ 0, %next ]
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%add = add i16 0, %phi
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%cmp = icmp slt i16 %phi, 0
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br i1 %cmp, label %unreachable, label %next
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next:
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br label %unreachable
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}
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