Method CreateMemSet

IDEHelper/Backend/BeMCContext.cpp:3262–3338

}

void BeMCContext::CreateMemSet(const BeMCOperand& addr, uint8 val, int size, int align)
{
	if ((size == 8) || (size == 4) || (size == 2) || (size == 1))
	{
		BeType* type = NULL;
		BeMCOperand zeroVal;
		zeroVal.mImmediate = 0;

		switch (size)
		{
		case 8:
			type = mModule->mContext->GetPrimitiveType(BeTypeCode_Int64);
			zeroVal.mKind = BeMCOperandKind_Immediate_i64;
			zeroVal.mImmediate = ((int64)val << 56) | ((int64)val << 48) | ((int64)val << 40) | ((int64)val << 32) |
				(val << 24) | (val << 16) | (val << 8) | val;
			break;
		case 4:
			type = mModule->mContext->GetPrimitiveType(BeTypeCode_Int32);
			zeroVal.mKind = BeMCOperandKind_Immediate_i32;
			zeroVal.mImmediate = (val << 24) | (val << 16) | (val << 8) | val;
			break;
		case 2:
			type = mModule->mContext->GetPrimitiveType(BeTypeCode_Int16);
			zeroVal.mKind = BeMCOperandKind_Immediate_i16;
			zeroVal.mImmediate = (val << 8) | val;
			break;
		case 1:
			type = mModule->mContext->GetPrimitiveType(BeTypeCode_Int8);
			zeroVal.mKind = BeMCOperandKind_Immediate_i8;
			zeroVal.mImmediate = val;
			break;
		}

		auto ptrType = mModule->mContext->GetPointerTo(type);

		auto result = AllocVirtualReg(ptrType);
		CreateDefineVReg(result);
		auto vregInfo = GetVRegInfo(result);
		vregInfo->mRelTo = addr;
		vregInfo->mIsExpr = true;

		BeMCOperand dest;
		dest.mKind = BeMCOperandKind_VRegLoad;
		dest.mVRegIdx = result.mVRegIdx;

		AllocInst(BeMCInstKind_Mov, dest, zeroVal);
		return;
	}

	if (addr.IsVRegAny())
	{
		auto vregInfo = GetVRegInfo(addr);
		if (!vregInfo->mIsRetVal)
			vregInfo->mForceMem = true;
		CheckForce(vregInfo);
	}

	if (size <= 256)