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

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81101 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2009-09-06 02:26:10 +00:00
parent 92a97a9166
commit 8f78a58e14
11 changed files with 195 additions and 287 deletions
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19
lib/Transforms/Utils/LCSSA.cpp
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@@ -58,7 +58,6 @@ namespace {
DominatorTree *DT;
std::vector<BasicBlock*> LoopBlocks;
PredIteratorCache PredCache;
Loop *L;
virtual bool runOnLoop(Loop *L, LPPassManager &LPM);
@@ -73,9 +72,9 @@ namespace {
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 @@ namespace {
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 @@ Pass *llvm::createLCSSAPass() { return new LCSSA(); }
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>();