Iterators folloring a SmallVector erased element are invalidated so
don't access cached iterators from after the erased element.
Re-apply 49056 with SmallVector support.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49106 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LoopIndexSplit.cpp b/lib/Transforms/Scalar/LoopIndexSplit.cpp
index 8053554..48b4535 100644
--- a/lib/Transforms/Scalar/LoopIndexSplit.cpp
+++ b/lib/Transforms/Scalar/LoopIndexSplit.cpp
@@ -232,8 +232,8 @@
return false;
// First see if it is possible to eliminate loop itself or not.
- for (SmallVector<SplitInfo, 4>::iterator SI = SplitData.begin(),
- E = SplitData.end(); SI != E;) {
+ for (SmallVector<SplitInfo, 4>::iterator SI = SplitData.begin();
+ SI != SplitData.end();) {
SplitInfo &SD = *SI;
ICmpInst *CI = dyn_cast<ICmpInst>(SD.SplitCondition);
if (SD.SplitCondition->getOpcode() == Instruction::And) {
@@ -244,8 +244,7 @@
return Changed;
} else {
SmallVector<SplitInfo, 4>::iterator Delete_SI = SI;
- ++SI;
- SplitData.erase(Delete_SI);
+ SI = SplitData.erase(Delete_SI);
}
}
else if (CI && CI->getPredicate() == ICmpInst::ICMP_EQ) {
@@ -256,8 +255,7 @@
return Changed;
} else {
SmallVector<SplitInfo, 4>::iterator Delete_SI = SI;
- ++SI;
- SplitData.erase(Delete_SI);
+ SI = SplitData.erase(Delete_SI);
}
} else
++SI;