- /// Get a call instruction from the call sequence chain.
- /// Tail calls are not allowed.
- SDNode *CallEnd = Chain.getNode();
- assert(CallEnd->getOpcode() == ISD::CALLSEQ_END &&
- "Expected a callseq node.");
- SDNode *Call = CallEnd->getOperand(0).getNode();
- bool hasGlue = Call->getGluedNode();
+ // The stackmap intrinsic only records the live variables (the arguemnts
+ // passed to it) and emits NOPS (if requested). Unlike the patchpoint
+ // intrinsic, this won't be lowered to a function call. This means we don't
+ // have to worry about calling conventions and target specific lowering code.
+ // Instead we perform the call lowering right here.
+ //
+ // chain, flag = CALLSEQ_START(chain, 0)
+ // chain, flag = STACKMAP(id, nbytes, ..., chain, flag)
+ // chain, flag = CALLSEQ_END(chain, 0, 0, flag)
+ //
+ Chain = DAG.getCALLSEQ_START(getRoot(), NullPtr, DL);
+ InFlag = Chain.getValue(1);