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[PM] Replace the Pass argument to SplitEdge with specific analyses used

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and updated.

This may appear to remove handling for things like alias analysis when
splitting critical edges here, but in fact no callers of SplitEdge
relied on this. Similarly, all of them wanted to preserve LCSSA if there
was any update of the loop info. That makes the interface much simpler.

With this, all of BasicBlockUtils.h is free of Pass arguments and
prepared for the new pass manager. This is tho majority of utilities
that relied on pass arguments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226459 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth
2015-01-19 12:36:53 +00:00
parent adf74a6403
commit 10b853882c
7 changed files with 15 additions and 25 deletions
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16
lib/Transforms/Utils/BasicBlockUtils.cpp
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@ -231,22 +231,14 @@ void llvm::ReplaceInstWithInst(Instruction *From, Instruction *To) {
/// SplitEdge - Split the edge connecting specified block. Pass P must
/// not be NULL.
BasicBlock *llvm::SplitEdge(BasicBlock *BB, BasicBlock *Succ, Pass *P) {
BasicBlock *llvm::SplitEdge(BasicBlock *BB, BasicBlock *Succ, DominatorTree *DT,
LoopInfo *LI) {
unsigned SuccNum = GetSuccessorNumber(BB, Succ);
auto *AA = P->getAnalysisIfAvailable<AliasAnalysis>();
auto *DTWP = P->getAnalysisIfAvailable<DominatorTreeWrapperPass>();
auto *DT = DTWP ? &DTWP->getDomTree() : nullptr;
auto *LIWP = P->getAnalysisIfAvailable<LoopInfoWrapperPass>();
auto *LI = LIWP ? &LIWP->getLoopInfo() : nullptr;
bool PreserveLCSSA = P->mustPreserveAnalysisID(LCSSAID);
auto Options = CriticalEdgeSplittingOptions(AA, DT, LI);
if (PreserveLCSSA)
Options.setPreserveLCSSA();
// If this is a critical edge, let SplitCriticalEdge do it.
TerminatorInst *LatchTerm = BB->getTerminator();
if (SplitCriticalEdge(LatchTerm, SuccNum, Options))
if (SplitCriticalEdge(LatchTerm, SuccNum, CriticalEdgeSplittingOptions(DT, LI)
.setPreserveLCSSA()))
return LatchTerm->getSuccessor(SuccNum);
// If the edge isn't critical, then BB has a single successor or Succ has a