[llvm-commits] [llvm] r56994 - /llvm/trunk/lib/Transforms/Utils/BasicBlockUtils.cpp

[Owen Anderson]

Author: resistor
Date: Fri Oct  3 01:55:35 2008
New Revision: 56994

URL: http://llvm.org/viewvc/llvm-project?rev=56994&view=rev
Log:
SplitBlock should only attempt to update LoopInfo if it is actually being used.

Modified:
    llvm/trunk/lib/Transforms/Utils/BasicBlockUtils.cpp

Modified: llvm/trunk/lib/Transforms/Utils/BasicBlockUtils.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Utils/BasicBlockUtils.cpp?rev=56994&r1=56993&r2=56994&view=diff

==============================================================================
--- llvm/trunk/lib/Transforms/Utils/BasicBlockUtils.cpp (original)
+++ llvm/trunk/lib/Transforms/Utils/BasicBlockUtils.cpp Fri Oct  3 01:55:35 2008
@@ -240,16 +240,15 @@
 /// the loop info is updated.
 ///
 BasicBlock *llvm::SplitBlock(BasicBlock *Old, Instruction *SplitPt, Pass *P) {
-
-  LoopInfo &LI = P->getAnalysis<LoopInfo>();
   BasicBlock::iterator SplitIt = SplitPt;
   while (isa<PHINode>(SplitIt))
     ++SplitIt;
   BasicBlock *New = Old->splitBasicBlock(SplitIt, Old->getName()+".split");
 
   // The new block lives in whichever loop the old one did.
-  if (Loop *L = LI.getLoopFor(Old))
-    L->addBasicBlockToLoop(New, LI.getBase());
+  if (LoopInfo* LI = P->getAnalysisToUpdate<LoopInfo>())
+    if (Loop *L = LI->getLoopFor(Old))
+      L->addBasicBlockToLoop(New, LI->getBase());
 
   if (DominatorTree *DT = P->getAnalysisToUpdate<DominatorTree>()) 
     {