[SystemZ] Support stackmaps and patchpoints

This adds back-end support for the @llvm.experimental.stackmap and
@llvm.experimental.patchpoint intrinsics.

llvm-svn: 326611

1 files changed, 11 insertions, 0 deletions

diff --git a/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp b/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
index d069cd5d7ae..e5cf3630033 100644
--- a/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
@@ -983,6 +983,13 @@ LowerAsmOperandForConstraint(SDValue Op, std::string &Constraint,
 
 #include "SystemZGenCallingConv.inc"
 
+const MCPhysReg *SystemZTargetLowering::getScratchRegisters(
+  CallingConv::ID) const {
+  static const MCPhysReg ScratchRegs[] = { SystemZ::R0D, SystemZ::R1D,
+                                           SystemZ::R14D, 0 };
+  return ScratchRegs;
+}
+
 bool SystemZTargetLowering::allowTruncateForTailCall(Type *FromType,
                                                      Type *ToType) const {
   return isTruncateFree(FromType, ToType);
@@ -6806,6 +6813,10 @@ MachineBasicBlock *SystemZTargetLowering::EmitInstrWithCustomInserter(
   case SystemZ::LTXBRCompare_VecPseudo:
     return emitLoadAndTestCmp0(MI, MBB, SystemZ::LTXBR);
 
+  case TargetOpcode::STACKMAP:
+  case TargetOpcode::PATCHPOINT:
+    return emitPatchPoint(MI, MBB);
+
   default:
     llvm_unreachable("Unexpected instr type to insert");
   }