- const uint16_t *ScratchRegs = NULL;
-
- // Handle PATCHPOINT specially and then use the generic code.
- if (Opc == TargetOpcode::PATCHPOINT) {
- unsigned CC = Node->getConstantOperandVal(PatchPointOpers::CCPos);
- NumDefs = NumResults;
+ const MCPhysReg *ScratchRegs = nullptr;
+
+ // Handle STACKMAP and PATCHPOINT specially and then use the generic code.
+ if (Opc == TargetOpcode::STACKMAP || Opc == TargetOpcode::PATCHPOINT) {
+ // Stackmaps do not have arguments and do not preserve their calling
+ // convention. However, to simplify runtime support, they clobber the same
+ // scratch registers as AnyRegCC.
+ unsigned CC = CallingConv::AnyReg;
+ if (Opc == TargetOpcode::PATCHPOINT) {
+ CC = Node->getConstantOperandVal(PatchPointOpers::CCPos);
+ NumDefs = NumResults;
+ }