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Add a DominatorTree argument to isLCSSA so that it doesn't have to

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compute a set of reachable blocks for itself each time it is called, which
is fairly frequently.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98179 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-03-10 19:38:49 +00:00
parent 0891d752a6
commit bbf81d8811
7 changed files with 8 additions and 22 deletions
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6
lib/Transforms/Utils/LoopUnroll.cpp
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@@ -105,8 +105,6 @@ static BasicBlock *FoldBlockIntoPredecessor(BasicBlock *BB, LoopInfo* LI) {
/// If a LoopPassManager is passed in, and the loop is fully removed, it will be
/// removed from the LoopPassManager as well. LPM can also be NULL.
bool llvm::UnrollLoop(Loop *L, unsigned Count, LoopInfo* LI, LPPassManager* LPM) {
assert(L->isLCSSAForm());
BasicBlock *Preheader = L->getLoopPreheader();
if (!Preheader) {
DEBUG(dbgs() << " Can't unroll; loop preheader-insertion failed.\n");
@@ -370,9 +368,5 @@ bool llvm::UnrollLoop(Loop *L, unsigned Count, LoopInfo* LI, LPPassManager* LPM)
if (CompletelyUnroll && LPM != NULL)
LPM->deleteLoopFromQueue(L);
// If we didn't completely unroll the loop, it should still be in LCSSA form.
if (!CompletelyUnroll)
assert(L->isLCSSAForm());
return true;
}