diff options
Diffstat (limited to 'lib/Analysis/LoopInfo.cpp')
| -rw-r--r-- | lib/Analysis/LoopInfo.cpp | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/lib/Analysis/LoopInfo.cpp b/lib/Analysis/LoopInfo.cpp index ef4b6430ba..70bf97cacc 100644 --- a/lib/Analysis/LoopInfo.cpp +++ b/lib/Analysis/LoopInfo.cpp @@ -155,17 +155,19 @@ Loop *LoopInfo::ConsiderForLoop(BasicBlock *BB, const DominatorSet &DS) { // now by moving the loop into the correct subloop. // Loop *SubLoop = BBMI->second; - Loop *OldSubLoopParent = SubLoop->getParentLoop(); - if (OldSubLoopParent != L) { - // Remove SubLoop from OldSubLoopParent's list of subloops... - std::vector<Loop*>::iterator I = - std::find(OldSubLoopParent->SubLoops.begin(), - OldSubLoopParent->SubLoops.end(), SubLoop); - assert(I != OldSubLoopParent->SubLoops.end() - && "Loop parent doesn't contain loop?"); - OldSubLoopParent->SubLoops.erase(I); - SubLoop->ParentLoop = L; - L->SubLoops.push_back(SubLoop); + if (SubLoop->getHeader() == *I) { // Only do this once for the loop... + Loop *OldSubLoopParent = SubLoop->getParentLoop(); + if (OldSubLoopParent != L) { + // Remove SubLoop from OldSubLoopParent's list of subloops... + std::vector<Loop*>::iterator I = + std::find(OldSubLoopParent->SubLoops.begin(), + OldSubLoopParent->SubLoops.end(), SubLoop); + assert(I != OldSubLoopParent->SubLoops.end() + && "Loop parent doesn't contain loop?"); + OldSubLoopParent->SubLoops.erase(I); + SubLoop->ParentLoop = L; + L->SubLoops.push_back(SubLoop); + } } } } |