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Reject a case we don't handle yet
author
Chris Lattner
<sabre@nondot.org>
Mon, 19 Sep 2005 23:57:04 +0000
(23:57 +0000)
committer
Chris Lattner
<sabre@nondot.org>
Mon, 19 Sep 2005 23:57:04 +0000
(23:57 +0000)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23393
91177308
-0d34-0410-b5e6-
96231b3b80d8
lib/Transforms/Utils/SimplifyCFG.cpp
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diff --git
a/lib/Transforms/Utils/SimplifyCFG.cpp
b/lib/Transforms/Utils/SimplifyCFG.cpp
index 08403aeca83ce8a4a3f1b4299417fb33d587b49e..c0cb2f42b1ea395ffc9ef06c414089ba11bc02e4 100644
(file)
--- a/
lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/
lib/Transforms/Utils/SimplifyCFG.cpp
@@
-897,7
+897,9
@@
HoistTerminator:
static bool FoldCondBranchOnPHI(BranchInst *BI) {
BasicBlock *BB = BI->getParent();
PHINode *PN = dyn_cast<PHINode>(BI->getCondition());
- if (!PN || PN->getParent() != BB) return false;
+ // NOTE: we currently cannot transform this case if the PHI node is used
+ // outside of the block.
+ if (!PN || PN->getParent() != BB || !PN->hasOneUse()) return false;
// Degenerate case of a single entry PHI.
if (PN->getNumIncomingValues() == 1) {