1 files changed, 47 insertions, 0 deletions
diff --git a/llvm/lib/Target/ARM/ARMCallLowering.cpp b/llvm/lib/Target/ARM/ARMCallLowering.cpp
new file mode 100644
index 00000000000..a7ef6e79591
--- /dev/null
+++ b/llvm/lib/Target/ARM/ARMCallLowering.cpp
@@ -0,0 +1,47 @@
+//===-- llvm/lib/Target/ARM/ARMCallLowering.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 the lowering of LLVM calls to machine code calls for
+/// GlobalISel.
+///
+//===----------------------------------------------------------------------===//
+
+#include "ARMCallLowering.h"
+
+#include "ARMBaseInstrInfo.h"
+#include "ARMISelLowering.h"
+
+#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
+
+using namespace llvm;
+
+#ifndef LLVM_BUILD_GLOBAL_ISEL
+#error "This shouldn't be built without GISel"
+#endif
+
+ARMCallLowering::ARMCallLowering(const ARMTargetLowering &TLI)
+    : CallLowering(&TLI) {}
+
+bool ARMCallLowering::lowerReturn(MachineIRBuilder &MIRBuilder,
+                                  const Value *Val, unsigned VReg) const {
+  // We're currently only handling void returns
+  if (Val != nullptr)
+    return false;
+
+  AddDefaultPred(MIRBuilder.buildInstr(ARM::BX_RET));
+
+  return true;
+}
+
+bool ARMCallLowering::lowerFormalArguments(MachineIRBuilder &MIRBuilder,
+                                           const Function &F,
+                                           ArrayRef<unsigned> VRegs) const {
+  return F.arg_empty();
+}