1 files changed, 50 insertions, 0 deletions
diff --git a/lib/Target/RISCV/RISCVCallLowering.cpp b/lib/Target/RISCV/RISCVCallLowering.cpp
new file mode 100644
index 000000000000..c63a84739c4a
--- /dev/null
+++ b/lib/Target/RISCV/RISCVCallLowering.cpp
@@ -0,0 +1,50 @@
+//===-- RISCVCallLowering.cpp - 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 implements the lowering of LLVM calls to machine code calls for
+/// GlobalISel.
+//
+//===----------------------------------------------------------------------===//
+
+#include "RISCVCallLowering.h"
+#include "RISCVISelLowering.h"
+#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
+
+using namespace llvm;
+
+RISCVCallLowering::RISCVCallLowering(const RISCVTargetLowering &TLI)
+    : CallLowering(&TLI) {}
+
+bool RISCVCallLowering::lowerReturn(MachineIRBuilder &MIRBuilder,
+                                    const Value *Val,
+                                    ArrayRef<Register> VRegs) const {
+
+  MachineInstrBuilder Ret = MIRBuilder.buildInstrNoInsert(RISCV::PseudoRET);
+
+  if (Val != nullptr) {
+    return false;
+  }
+  MIRBuilder.insertInstr(Ret);
+  return true;
+}
+
+bool RISCVCallLowering::lowerFormalArguments(
+    MachineIRBuilder &MIRBuilder, const Function &F,
+    ArrayRef<ArrayRef<Register>> VRegs) const {
+
+  if (F.arg_empty())
+    return true;
+
+  return false;
+}
+
+bool RISCVCallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
+                                  CallLoweringInfo &Info) const {
+  return false;
+}