Fix Transforms/SimplifyCFG/2005-08-03-PHIFactorCrash.ll, a problem that
occurred while bugpointing another testcase
llvm-svn: 22621
diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
index 742efe6..2bf9ae8 100644
--- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -805,7 +805,7 @@
return Changed;
}
-/// HoistThenElseCodeToIf - Given a conditional branch that codes to BB1 and
+/// HoistThenElseCodeToIf - Given a conditional branch that goes to BB1 and
/// BB2, hoist any common code in the two blocks up into the branch block. The
/// caller of this function guarantees that BI's block dominates BB1 and BB2.
static bool HoistThenElseCodeToIf(BranchInst *BI) {
@@ -818,7 +818,8 @@
BasicBlock *BB2 = BI->getSuccessor(1); // The false destination
Instruction *I1 = BB1->begin(), *I2 = BB2->begin();
- if (I1->getOpcode() != I2->getOpcode() || !I1->isIdenticalTo(I2))
+ if (I1->getOpcode() != I2->getOpcode() || !I1->isIdenticalTo(I2) ||
+ isa<PHINode>(I1))
return false;
// If we get here, we can hoist at least one instruction.