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[NFC] Add utility function for SafetyInfo updates for moveBefore 

llvm-svn: 346472
This commit is contained in:
Max Kazantsev 2018-11-09 05:39:04 +00:00
parent 71c35e13c3
commit 9883d1e1a7
1 changed files with 11 additions and 3 deletions
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14
llvm/lib/Transforms/Scalar/LICM.cpp
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@ -126,6 +126,9 @@ CloneInstructionInExitBlock(Instruction &I, BasicBlock &ExitBlock, PHINode &PN,
static void eraseInstruction(Instruction &I, ICFLoopSafetyInfo &SafetyInfo,
AliasSetTracker *AST);
static void moveInstructionBefore(Instruction &I, Instruction &Dest,
ICFLoopSafetyInfo &SafetyInfo);
namespace {
struct LoopInvariantCodeMotion {
using ASTrackerMapTy = DenseMap<Loop *, std::unique_ptr<AliasSetTracker>>;
@ -890,6 +893,13 @@ static void eraseInstruction(Instruction &I, ICFLoopSafetyInfo &SafetyInfo,
I.eraseFromParent();
}
static void moveInstructionBefore(Instruction &I, Instruction &Dest,
ICFLoopSafetyInfo &SafetyInfo) {
SafetyInfo.removeInstruction(&I);
SafetyInfo.insertInstructionTo(Dest.getParent());
I.moveBefore(&Dest);
}
static Instruction *sinkThroughTriviallyReplaceablePHI(
PHINode *TPN, Instruction *I, LoopInfo *LI,
SmallDenseMap<BasicBlock *, Instruction *, 32> &SunkCopies,
@ -1118,10 +1128,8 @@ static void hoist(Instruction &I, const DominatorTree *DT, const Loop *CurLoop,
!SafetyInfo->isGuaranteedToExecute(I, DT, CurLoop))
I.dropUnknownNonDebugMetadata();
SafetyInfo->removeInstruction(&I);
SafetyInfo->insertInstructionTo(Preheader);
// Move the new node to the Preheader, before its terminator.
I.moveBefore(Preheader->getTerminator());
moveInstructionBefore(I, *Preheader->getTerminator(), *SafetyInfo);
// Do not retain debug locations when we are moving instructions to different
// basic blocks, because we want to avoid jumpy line tables. Calls, however,