Add a comment, and fix a typo that broke the build.

llvm-svn: 29094
2006-07-10 22:15:25 +00:00 · 2006-07-10 22:15:25 +00:00 · bbf8990ef7
commit bbf8990ef7
parent ae8aa646f1
1 changed files with 2 additions and 1 deletions
--- a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
@ -6255,7 +6255,8 @@ static bool DeadPHICycle(PHINode *PN, std::set<PHINode*> &PotentiallyDeadPHIs) {
 // PHINode simplification
 //
 Instruction *InstCombiner::visitPHINode(PHINode &PN) {
-  if (mustPreservePassID(LCSSAID)) return 0;
+  // If LCSSA is around, don't mess with Phi nodes
+  if (mustPreserveAnalysisID(LCSSAID)) return 0;
  
  if (Value *V = PN.hasConstantValue())
    return ReplaceInstUsesWith(PN, V);