This is an archive of the discontinued LLVM Phabricator instance.

Alternative to D58560.
AbandonedPublic

Authored by asbirlea on Feb 27 2019, 3:45 PM.

Summary

Tentative alternative to D58560.
DO NOT CHECK IN.

Repository

rL LLVM

Build Status

Buildable 28612
Build 28611: arc lint + arc unit

PR36801 resolved.

Path

Size

lib/

Transforms/

Utils/

7 lines

Show First 20 Lines • Show All 184 Lines • ▼ Show 20 Lines	Value SSAUpdater::GetValueInMiddleOfBlock(BasicBlock BB) {
LLVM_DEBUG(dbgs() << " Inserted PHI: " << *InsertedPHI << "\n");		LLVM_DEBUG(dbgs() << " Inserted PHI: " << *InsertedPHI << "\n");
return InsertedPHI;		return InsertedPHI;
}		}

void SSAUpdater::RewriteUse(Use &U) {		void SSAUpdater::RewriteUse(Use &U) {
Instruction *User = cast<Instruction>(U.getUser());		Instruction *User = cast<Instruction>(U.getUser());

Value *V;		Value *V;
if (PHINode *UserPN = dyn_cast<PHINode>(User))		bool IsPhi = false;
		if (PHINode *UserPN = dyn_cast<PHINode>(User)) {
V = GetValueAtEndOfBlock(UserPN->getIncomingBlock(U));		V = GetValueAtEndOfBlock(UserPN->getIncomingBlock(U));
		IsPhi = true;
		}
else		else
V = GetValueInMiddleOfBlock(User->getParent());		V = GetValueInMiddleOfBlock(User->getParent());

// Notify that users of the existing value that it is being replaced.		// Notify that users of the existing value that it is being replaced.
Value *OldVal = U.get();		Value *OldVal = U.get();
if (OldVal != V && OldVal->hasValueHandle())		if (OldVal != V && OldVal->hasValueHandle() && !IsPhi)
ValueHandleBase::ValueIsRAUWd(OldVal, V);		ValueHandleBase::ValueIsRAUWd(OldVal, V);

U.set(V);		U.set(V);
}		}

void SSAUpdater::RewriteUseAfterInsertions(Use &U) {		void SSAUpdater::RewriteUseAfterInsertions(Use &U) {
Instruction *User = cast<Instruction>(U.getUser());		Instruction *User = cast<Instruction>(U.getUser());

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