return TargetLowering::getConstraintType(Constraint);
}
+/// Examine constraint type and operand type and determine a weight value.
+/// This object must already have been set up with the operand type
+/// and the current alternative constraint selected.
+TargetLowering::ConstraintWeight
+ARMTargetLowering::getSingleConstraintMatchWeight(
+ AsmOperandInfo &info, const char *constraint) const {
+ ConstraintWeight weight = CW_Invalid;
+ Value *CallOperandVal = info.CallOperandVal;
+ // If we don't have a value, we can't do a match,
+ // but allow it at the lowest weight.
+ if (CallOperandVal == NULL)
+ return CW_Default;
+ const Type *type = CallOperandVal->getType();
+ // Look at the constraint type.
+ switch (*constraint) {
+ default:
+ weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
+ break;
+ case 'l':
+ if (type->isIntegerTy()) {
+ if (Subtarget->isThumb())
+ weight = CW_SpecificReg;
+ else
+ weight = CW_Register;
+ }
+ break;
+ case 'w':
+ if (type->isFloatingPointTy())
+ weight = CW_Register;
+ break;
+ }
+ return weight;
+}
+
std::pair<unsigned, const TargetRegisterClass*>
ARMTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
EVT VT) const {