commit ed6987d5e1669a0dec12cb470c38a0340ceabb7d
author Evan Cheng <evan.cheng@apple.com> Sun Sep 06 02:26:10 2009 +0000
committer Evan Cheng <evan.cheng@apple.com> Sun Sep 06 02:26:10 2009 +0000
tree 1d83ef98ecaa3cd9f02b23d398f4b0adbed71ed9
parent 4f3451886cd728c60d38f8eec7b6608acc684cc6

Revert r80926. It causes loop unswitch assertion and slow down some JIT tests significantly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81101 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Utils/LCSSA.cpp

diff --git a/lib/Transforms/Utils/LCSSA.cpp b/lib/Transforms/Utils/LCSSA.cpp
index e0251f8..84fcc64 100644
--- a/lib/Transforms/Utils/LCSSA.cpp
+++ b/lib/Transforms/Utils/LCSSA.cpp
@@ -58,7 +58,6 @@
     DominatorTree *DT;
     std::vector<BasicBlock*> LoopBlocks;
     PredIteratorCache PredCache;
-    Loop *L;
     
     virtual bool runOnLoop(Loop *L, LPPassManager &LPM);
 
@@ -73,9 +72,9 @@
       AU.setPreservesCFG();
       AU.addRequiredID(LoopSimplifyID);
       AU.addPreservedID(LoopSimplifyID);
-      AU.addRequiredTransitive<LoopInfo>();
+      AU.addRequired<LoopInfo>();
       AU.addPreserved<LoopInfo>();
-      AU.addRequiredTransitive<DominatorTree>();
+      AU.addRequired<DominatorTree>();
       AU.addPreserved<ScalarEvolution>();
       AU.addPreserved<DominatorTree>();
 
@@ -87,17 +86,6 @@
       AU.addPreserved<DominanceFrontier>();
     }
   private:
-
-    /// verifyAnalysis() - Verify loop nest.
-    virtual void verifyAnalysis() const {
-#ifndef NDEBUG
-      // Sanity check: Check basic loop invariants.
-      L->verifyLoop();
-      // Check the special guarantees that LCSSA makes.
-      assert(L->isLCSSAForm());
-#endif
-    }
-
     void getLoopValuesUsedOutsideLoop(Loop *L,
                                       SetVector<Instruction*> &AffectedValues,
                                  const SmallVector<BasicBlock*, 8>& exitBlocks);
@@ -119,8 +107,7 @@
 const PassInfo *const llvm::LCSSAID = &X;
 
 /// runOnFunction - Process all loops in the function, inner-most out.
-bool LCSSA::runOnLoop(Loop *l, LPPassManager &LPM) {
-  L = l;
+bool LCSSA::runOnLoop(Loop *L, LPPassManager &LPM) {
   PredCache.clear();
   
   LI = &LPM.getAnalysis<LoopInfo>();