1 files changed, 59 insertions, 0 deletions
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUCallLowering.h b/llvm/lib/Target/AMDGPU/AMDGPUCallLowering.h
new file mode 100644
index 000000000000..53a562586bc0
--- /dev/null
+++ b/llvm/lib/Target/AMDGPU/AMDGPUCallLowering.h
@@ -0,0 +1,59 @@
+//===- lib/Target/AMDGPU/AMDGPUCallLowering.h - Call lowering -*- C++ -*---===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file describes how to lower LLVM calls to machine code calls.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUCALLLOWERING_H
+#define LLVM_LIB_TARGET_AMDGPU_AMDGPUCALLLOWERING_H
+
+#include "AMDGPU.h"
+#include "llvm/CodeGen/GlobalISel/CallLowering.h"
+
+namespace llvm {
+
+class AMDGPUTargetLowering;
+class MachineInstrBuilder;
+
+class AMDGPUCallLowering: public CallLowering {
+  Register lowerParameterPtr(MachineIRBuilder &B, Type *ParamTy,
+                             uint64_t Offset) const;
+
+  void lowerParameter(MachineIRBuilder &B, Type *ParamTy, uint64_t Offset,
+                      unsigned Align, Register DstReg) const;
+
+  /// A function of this type is used to perform value split action.
+  using SplitArgTy = std::function<void(ArrayRef<Register>, LLT, LLT, int)>;
+
+  void splitToValueTypes(const ArgInfo &OrigArgInfo,
+                         SmallVectorImpl<ArgInfo> &SplitArgs,
+                         const DataLayout &DL, MachineRegisterInfo &MRI,
+                         CallingConv::ID CallConv,
+                         SplitArgTy SplitArg) const;
+
+  bool lowerReturnVal(MachineIRBuilder &B, const Value *Val,
+                      ArrayRef<Register> VRegs, MachineInstrBuilder &Ret) const;
+
+public:
+  AMDGPUCallLowering(const AMDGPUTargetLowering &TLI);
+
+  bool lowerReturn(MachineIRBuilder &B, const Value *Val,
+                   ArrayRef<Register> VRegs) const override;
+
+  bool lowerFormalArgumentsKernel(MachineIRBuilder &B, const Function &F,
+                                  ArrayRef<ArrayRef<Register>> VRegs) const;
+
+  bool lowerFormalArguments(MachineIRBuilder &B, const Function &F,
+                            ArrayRef<ArrayRef<Register>> VRegs) const override;
+  static CCAssignFn *CCAssignFnForCall(CallingConv::ID CC, bool IsVarArg);
+  static CCAssignFn *CCAssignFnForReturn(CallingConv::ID CC, bool IsVarArg);
+};
+} // End of namespace llvm;
+#endif