JumpThreading keeps LazyValueInfo up to date, so we don't need to rerun it

if we schedule another LVI-using pass afterwards. llvm-svn: 112722
2010-09-01 18:27:22 +00:00 · 2010-09-01 18:27:22 +00:00 · 73f988cafa
parent 3ce9c4a65f
commit 73f988cafa
1 changed files with 3 additions and 1 deletions
--- a/llvm/lib/Transforms/Scalar/JumpThreading.cpp
+++ b/llvm/lib/Transforms/Scalar/JumpThreading.cpp
@ -100,8 +100,10 @@ namespace {
    bool runOnFunction(Function &F);
    
    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
-      if (EnableLVI)
+      if (EnableLVI) {
        AU.addRequired<LazyValueInfo>();
+        AU.addPreserved<LazyValueInfo>();
+      }
    }
    
    void FindLoopHeaders(Function &F);