Don't recalculate the loop info and loop dominators analyses if they're

preserved. llvm-svn: 45596
2008-01-04 20:54:55 +00:00
parent 2bd541c5ff
commit 0c209430b4
8 changed files with 34 additions and 6 deletions
--- a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -60,6 +60,8 @@ namespace {
 void LiveIntervals::getAnalysisUsage(AnalysisUsage &AU) const {
  AU.addPreserved<LiveVariables>();
  AU.addRequired<LiveVariables>();
+  AU.addPreservedID(MachineLoopInfoID);
+  AU.addPreservedID(MachineDominatorsID);
  AU.addPreservedID(PHIEliminationID);
  AU.addRequiredID(PHIEliminationID);
  AU.addRequiredID(TwoAddressInstructionPassID);