bool AArch64DAGToDAGISel::SelectInlineAsmMemoryOperand(
const SDValue &Op, unsigned ConstraintID, std::vector<SDValue> &OutOps) {
- assert(ConstraintID == InlineAsm::Constraint_m &&
- "unexpected asm memory constraint");
- // Require the address to be in a register. That is safe for all AArch64
- // variants and it is hard to do anything much smarter without knowing
- // how the operand is used.
- OutOps.push_back(Op);
- return false;
+ switch(ConstraintID) {
+ default:
+ llvm_unreachable("Unexpected asm memory constraint");
+ case InlineAsm::Constraint_i:
+ case InlineAsm::Constraint_m:
+ case InlineAsm::Constraint_Q:
+ // Require the address to be in a register. That is safe for all AArch64
+ // variants and it is hard to do anything much smarter without knowing
+ // how the operand is used.
+ OutOps.push_back(Op);
+ return false;
+ }
+ return true;
}
/// SelectArithImmed - Select an immediate value that can be represented as
unsigned getInlineAsmMemConstraint(
const std::string &ConstraintCode) const override {
- // FIXME: Map different constraints differently.
- return InlineAsm::Constraint_m;
+ if (ConstraintCode == "Q")
+ return InlineAsm::Constraint_Q;
+ // FIXME: clang has code for 'Ump', 'Utf', 'Usa', and 'Ush' but these are
+ // followed by llvm_unreachable so we'll leave them unimplemented in
+ // the backend for now.
+ return TargetLowering::getInlineAsmMemConstraint(ConstraintCode);
}
bool isUsedByReturnOnly(SDNode *N, SDValue &Chain) const override;