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fix PR6743, a case where we'd delete an instruction before using it

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in some cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100937 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-04-10 18:26:57 +00:00
parent a2fb234b04
commit 6f285d2105
2 changed files with 20 additions and 1 deletions
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17
test/Transforms/JumpThreading/crash.ll
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@@ -324,3 +324,20 @@ A: ; preds = %entry
call void undef(i64 ptrtoint (i8* blockaddress(@test11, %A) to i64)) nounwind
unreachable
}
; PR6743
define void @test12() nounwind ssp {
entry:
br label %lbl_51
lbl_51: ; preds = %if.then, %entry
%tmp3 = phi i1 [ false, %if.then ], [ undef, %entry ] ; <i1> [#uses=2]
br i1 %tmp3, label %if.end12, label %if.then
if.then: ; preds = %lbl_51
br i1 %tmp3, label %lbl_51, label %if.end12
if.end12: ; preds = %if.then, %lbl_51
ret void
}