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a1b821fac9
There is no suitable basic block to sink instructions in loops without exits. The only way an instruction in a loop without exits can be used is as an incoming value to a PHI. In such cases, the incoming block for the corresponding value is unreachable. This fixes PR24013. Differential Revision: http://reviews.llvm.org/D10903 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241987 91177308-0d34-0410-b5e6-96231b3b80d8
20 lines
545 B
LLVM
20 lines
545 B
LLVM
; RUN: opt -licm -S < %s | FileCheck %s
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define void @f(i1 zeroext %p1) {
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; CHECK-LABEL: @f(
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entry:
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br label %lbl
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lbl.loopexit: ; No predecessors!
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br label %lbl
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lbl: ; preds = %lbl.loopexit, %entry
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%phi = phi i32 [ %conv, %lbl.loopexit ], [ undef, %entry ]
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; CHECK: phi i32 [ undef, {{.*}} ], [ undef
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br label %if.then.5
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if.then.5: ; preds = %if.then.5, %lbl
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%conv = zext i1 undef to i32
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br label %if.then.5
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}
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