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reachable uses, but there still might be uses in dead blocks. Use the standard solution of replacing all the uses with undef. This is a rare case because it's very sensitive to phase ordering in SimplifyCFG. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127299 91177308-0d34-0410-b5e6-96231b3b80d8
32 lines
1006 B
LLVM
32 lines
1006 B
LLVM
; RUN: opt < %s -simplifycfg -S | FileCheck %s
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; PR9420
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; Note that the crash in PR9420 test is sensitive to the ordering of
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; the transformations done by SimplifyCFG, so this test is likely to rot
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; quickly.
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define noalias i8* @func_29() nounwind {
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; CHECK: entry:
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; CHECK-NEXT: unreachable
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entry:
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br label %for.cond
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for.cond: ; preds = %for.inc38, %entry
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%p_34.addr.0 = phi i16 [ 1, %entry ], [ %conv40, %for.inc38 ]
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br label %for.cond1
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for.cond1: ; preds = %for.inc29, %for.cond
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%p_32.addr.0 = phi i1 [ true, %for.cond ], [ true, %for.inc29 ]
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br i1 %p_32.addr.0, label %for.body8, label %for.inc38
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for.body8: ; preds = %for.cond1
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unreachable
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for.inc29: ; preds = %for.cond17
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br label %for.cond1
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for.inc38: ; preds = %for.end32
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%conv40 = add i16 %p_34.addr.0, 1
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br label %for.cond
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}
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