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Differential D24805 Diff 100231 llvm/trunk/lib/Transforms/Utils/Local.cpp

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llvm/trunk/lib/Transforms/Utils/Local.cpp

Show First 20 Lines • Show All 2,103 Lines • ▼ Show 20 Lines	void llvm::maybeMarkSanitizerLibraryCallNoBuiltin(
CallInst CI, const TargetLibraryInfo TLI) {		CallInst CI, const TargetLibraryInfo TLI) {
Function *F = CI->getCalledFunction();		Function *F = CI->getCalledFunction();
LibFunc Func;		LibFunc Func;
if (F && !F->hasLocalLinkage() && F->hasName() &&		if (F && !F->hasLocalLinkage() && F->hasName() &&
TLI->getLibFunc(F->getName(), Func) && TLI->hasOptimizedCodeGen(Func) &&		TLI->getLibFunc(F->getName(), Func) && TLI->hasOptimizedCodeGen(Func) &&
!F->doesNotAccessMemory())		!F->doesNotAccessMemory())
CI->addAttribute(AttributeList::FunctionIndex, Attribute::NoBuiltin);		CI->addAttribute(AttributeList::FunctionIndex, Attribute::NoBuiltin);
}		}

		bool llvm::canReplaceOperandWithVariable(const Instruction *I, unsigned OpIdx) {
		// We can't have a PHI with a metadata type.
		if (I->getOperand(OpIdx)->getType()->isMetadataTy())
		return false;

		// Early exit.
		if (!isa<Constant>(I->getOperand(OpIdx)))
		return true;

		switch (I->getOpcode()) {
		default:
		return true;
		case Instruction::Call:
		case Instruction::Invoke:
		// Many arithmetic intrinsics have no issue taking a
		// variable, however it's hard to distingish these from
		// specials such as @llvm.frameaddress that require a constant.
		if (isa<IntrinsicInst>(I))
		return false;

		// Constant bundle operands may need to retain their constant-ness for
		// correctness.
		if (ImmutableCallSite(I).isBundleOperand(OpIdx))
		return false;
		return true;
		case Instruction::ShuffleVector:
		// Shufflevector masks are constant.
		return OpIdx != 2;
		case Instruction::ExtractValue:
		case Instruction::InsertValue:
		// All operands apart from the first are constant.
		return OpIdx == 0;
		case Instruction::Alloca:
		return false;
		case Instruction::GetElementPtr:
		if (OpIdx == 0)
		return true;
		gep_type_iterator It = gep_type_begin(I);
		for (auto E = std::next(It, OpIdx); It != E; ++It)
		if (It.isStruct())
		return false;
		return true;
		}
		}