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fix a bug I introduced in simplifycfg handling single entry phi

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nodes. FoldSingleEntryPHINodes deletes the PHI, so there is no
need to delete it afterward.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60653 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2008-12-07 07:22:45 +00:00
parent 75c99c5aa8
commit a16ead8b10
2 changed files with 13 additions and 1 deletions
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1
lib/Transforms/Utils/SimplifyCFG.cpp
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@ -1102,7 +1102,6 @@ static bool FoldCondBranchOnPHI(BranchInst *BI) {
// Degenerate case of a single entry PHI. // Degenerate case of a single entry PHI.
if (PN->getNumIncomingValues() == 1) { if (PN->getNumIncomingValues() == 1) {
FoldSingleEntryPHINodes(PN->getParent()); FoldSingleEntryPHINodes(PN->getParent());
PN->eraseFromParent();
return true; return true;
} }

13
test/Transforms/SimplifyCFG/2008-12-06-SingleEntryPhi.ll Normal file
View File

@ -0,0 +1,13 @@
; RUN: llvm-as < %s | opt -simplifycfg | llvm-dis
define i32 @test() {
entry:
br label %T
T:
%C = phi i1 [false, %entry]
br i1 %C, label %X, label %Y
X:
ret i32 2
Y:
add i32 1, 2
ret i32 1
}