Differential D78369 Diff 265778 llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp

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Show First 20 Lines • Show All 82 Lines • ▼ Show 20 Lines	bool InstCombiner::SimplifyDemandedBits(Instruction *I, unsigned OpNo,
const APInt &DemandedMask,		const APInt &DemandedMask,
KnownBits &Known,		KnownBits &Known,
unsigned Depth) {		unsigned Depth) {
Use &U = I->getOperandUse(OpNo);		Use &U = I->getOperandUse(OpNo);
Value *NewVal = SimplifyDemandedUseBits(U.get(), DemandedMask, Known,		Value *NewVal = SimplifyDemandedUseBits(U.get(), DemandedMask, Known,
Depth, I);		Depth, I);
if (!NewVal) return false;		if (!NewVal) return false;
if (Instruction* OpInst = dyn_cast<Instruction>(U))		if (Instruction* OpInst = dyn_cast<Instruction>(U))
salvageDebugInfoOrMarkUndef(*OpInst);		salvageDebugInfo(*OpInst);

replaceUse(U, NewVal);		replaceUse(U, NewVal);
return true;		return true;
}		}


/// This function attempts to replace V with a simpler value based on the		/// This function attempts to replace V with a simpler value based on the
/// demanded bits. When this function is called, it is known that only the bits		/// demanded bits. When this function is called, it is known that only the bits
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