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diff --git a/llvm/lib/CodeGen/GlobalISel/CallLowering.cpp b/llvm/lib/CodeGen/GlobalISel/CallLowering.cpp
new file mode 100644
index 00000000000..9d1c1e7402d
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+++ b/llvm/lib/CodeGen/GlobalISel/CallLowering.cpp
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+//===-- lib/CodeGen/GlobalISel/CallLowering.cpp - Call lowering -----------===//
+//
+//                     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 some simple delegations needed for call lowering.
+///
+//===----------------------------------------------------------------------===//
+
+
+#include "llvm/CodeGen/GlobalISel/CallLowering.h"
+#include "llvm/CodeGen/MachineOperand.h"
+#include "llvm/IR/Instructions.h"
+
+using namespace llvm;
+
+bool CallLowering::lowerCall(
+    MachineIRBuilder &MIRBuilder, const CallInst &CI, unsigned ResReg,
+    ArrayRef<unsigned> ArgRegs, std::function<unsigned()> GetCalleeReg) const {
+  // First step is to marshall all the function's parameters into the correct
+  // physregs and memory locations. Gather the sequence of argument types that
+  // we'll pass to the assigner function.
+  SmallVector<MVT, 8> ArgTys;
+  for (auto &Arg : CI.arg_operands())
+    ArgTys.push_back(MVT::getVT(Arg->getType()));
+
+  MachineOperand Callee = MachineOperand::CreateImm(0);
+  if (Function *F = CI.getCalledFunction())
+    Callee = MachineOperand::CreateGA(F, 0);
+  else
+    Callee = MachineOperand::CreateReg(GetCalleeReg(), false);
+
+  return lowerCall(MIRBuilder, Callee, MVT::getVT(CI.getType()),
+                   ResReg ? ResReg : ArrayRef<unsigned>(), ArgTys, ArgRegs);
+}