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If sdisel has decided to sink GEP index expression into any BB. Replace all uses
in that BB. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35132 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -3982,18 +3982,13 @@ static bool SinkInvariantGEPIndex(BinaryOperator *BinOp, LoopInfo *loopInfo,
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BinOp->getOpcode() != Instruction::Sub)
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return false;
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/// InsertedOps - Only insert a duplicate in each block once.
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std::map<BasicBlock*, BinaryOperator*> InsertedOps;
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bool MadeChange = false;
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// DestBBs - These are the blocks where a copy of BinOp will be inserted.
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std::set<BasicBlock*> DestBBs;
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BasicBlock *DefBB = BinOp->getParent();
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bool MadeChange = false;
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for (Value::use_iterator UI = BinOp->use_begin(), E = BinOp->use_end();
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UI != E; ) {
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UI != E; ++UI) {
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Instruction *User = cast<Instruction>(*UI);
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// Preincrement use iterator so we don't invalidate it.
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++UI;
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// Only look for GEP use in another block.
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if (User->getParent() == DefBB) continue;
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@ -4016,28 +4011,48 @@ static bool SinkInvariantGEPIndex(BinaryOperator *BinOp, LoopInfo *loopInfo,
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if (UseTy &&
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TLI.isLegalAddressExpression(Instruction::Add, BinOp->getOperand(0),
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BinOp->getOperand(1), UseTy)) {
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// Sink it into user block.
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BinaryOperator *&InsertedOp = InsertedOps[UserBB];
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if (!InsertedOp) {
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BasicBlock::iterator InsertPt = UserBB->begin();
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while (isa<PHINode>(InsertPt)) ++InsertPt;
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InsertedOp =
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BinaryOperator::create(BinOp->getOpcode(), BinOp->getOperand(0),
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BinOp->getOperand(1), "", InsertPt);
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}
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User->replaceUsesOfWith(BinOp, InsertedOp);
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DestBBs.insert(UserBB);
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MadeChange = true;
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}
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}
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}
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}
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// Nothing to do.
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if (!MadeChange)
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return false;
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/// InsertedOps - Only insert a duplicate in each block once.
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std::map<BasicBlock*, BinaryOperator*> InsertedOps;
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for (Value::use_iterator UI = BinOp->use_begin(), E = BinOp->use_end();
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UI != E; ) {
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Instruction *User = cast<Instruction>(*UI);
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BasicBlock *UserBB = User->getParent();
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// Preincrement use iterator so we don't invalidate it.
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++UI;
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// If any user in this BB wants it, replace all the uses in the BB.
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if (DestBBs.count(UserBB)) {
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// Sink it into user block.
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BinaryOperator *&InsertedOp = InsertedOps[UserBB];
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if (!InsertedOp) {
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BasicBlock::iterator InsertPt = UserBB->begin();
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while (isa<PHINode>(InsertPt)) ++InsertPt;
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InsertedOp =
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BinaryOperator::create(BinOp->getOpcode(), BinOp->getOperand(0),
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BinOp->getOperand(1), "", InsertPt);
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}
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User->replaceUsesOfWith(BinOp, InsertedOp);
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}
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}
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if (BinOp->use_empty())
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BinOp->eraseFromParent();
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return MadeChange;
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return true;
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}
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