Don't back past debug info intrinsics; SCEVExpander's strategy
for ignoring debug info intrinsics everywhere else is to advance
past them, and it needs to be consistent.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99332 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ScalarEvolutionExpander.cpp b/lib/Analysis/ScalarEvolutionExpander.cpp
index 138cdc6..2e18cea 100644
--- a/lib/Analysis/ScalarEvolutionExpander.cpp
+++ b/lib/Analysis/ScalarEvolutionExpander.cpp
@@ -1268,19 +1268,8 @@
L = L->getParentLoop())
if (S->isLoopInvariant(L)) {
if (!L) break;
- if (BasicBlock *Preheader = L->getLoopPreheader()) {
+ if (BasicBlock *Preheader = L->getLoopPreheader())
InsertPt = Preheader->getTerminator();
- BasicBlock::iterator IP = InsertPt;
- // Back past any debug info instructions. Sometimes we inserted
- // something earlier before debug info but after any real instructions.
- // This should behave the same as if debug info was not present.
- while (IP != Preheader->begin()) {
- --IP;
- if (!isa<DbgInfoIntrinsic>(IP))
- break;
- InsertPt = IP;
- }
- }
} else {
// If the SCEV is computable at this level, insert it into the header
// after the PHIs (and after any other instructions that we've inserted