Ignore dbg intrinsics while hoisting common code in the two blocks up into the branch block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63687 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp
index 9f5df98..ea68abe 100644
--- a/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -853,7 +853,14 @@
BasicBlock *BB1 = BI->getSuccessor(0); // The true destination.
BasicBlock *BB2 = BI->getSuccessor(1); // The false destination
- Instruction *I1 = BB1->begin(), *I2 = BB2->begin();
+ BasicBlock::iterator BB1_Itr = BB1->begin();
+ BasicBlock::iterator BB2_Itr = BB2->begin();
+
+ Instruction *I1 = BB1_Itr++, *I2 = BB2_Itr++;
+ while (isa<DbgInfoIntrinsic>(I1))
+ I1 = BB1_Itr++;
+ while (isa<DbgInfoIntrinsic>(I2))
+ I2 = BB2_Itr++;
if (I1->getOpcode() != I2->getOpcode() || isa<PHINode>(I1) ||
isa<InvokeInst>(I1) || !I1->isIdenticalTo(I2))
return false;
@@ -875,8 +882,12 @@
I2->replaceAllUsesWith(I1);
BB2->getInstList().erase(I2);
- I1 = BB1->begin();
- I2 = BB2->begin();
+ I1 = BB1_Itr++;
+ while (isa<DbgInfoIntrinsic>(I1))
+ I1 = BB1_Itr++;
+ I2 = BB2_Itr++;
+ while (isa<DbgInfoIntrinsic>(I2))
+ I2 = BB2_Itr++;
} while (I1->getOpcode() == I2->getOpcode() && I1->isIdenticalTo(I2));
return true;