1 files changed, 47 insertions, 0 deletions
diff --git a/llvm/lib/Target/Mips/MipsCallLowering.cpp b/llvm/lib/Target/Mips/MipsCallLowering.cpp
new file mode 100644
index 00000000000..55608f47278
--- /dev/null
+++ b/llvm/lib/Target/Mips/MipsCallLowering.cpp
@@ -0,0 +1,47 @@
+//===- MipsCallLowering.cpp -------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file
+/// This file implements the lowering of LLVM calls to machine code calls for
+/// GlobalISel.
+//
+//===----------------------------------------------------------------------===//
+
+#include "MipsCallLowering.h"
+#include "MipsISelLowering.h"
+#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
+
+using namespace llvm;
+
+MipsCallLowering::MipsCallLowering(const MipsTargetLowering &TLI)
+    : CallLowering(&TLI) {}
+
+bool MipsCallLowering::lowerReturn(MachineIRBuilder &MIRBuilder,
+                                   const Value *Val, unsigned VReg) const {
+
+  MachineInstrBuilder Ret = MIRBuilder.buildInstrNoInsert(Mips::RetRA);
+
+  if (Val != nullptr) {
+    return false;
+  }
+  MIRBuilder.insertInstr(Ret);
+  return true;
+}
+
+bool MipsCallLowering::lowerFormalArguments(MachineIRBuilder &MIRBuilder,
+                                            const Function &F,
+                                            ArrayRef<unsigned> VRegs) const {
+
+  // Quick exit if there aren't any args.
+  if (F.arg_empty())
+    return true;
+
+  // Function had args, but we didn't lower them.
+  return false;
+}