1 files changed, 53 insertions, 0 deletions
diff --git a/llvm/lib/Target/PowerPC/GISel/PPCCallLowering.cpp b/llvm/lib/Target/PowerPC/GISel/PPCCallLowering.cpp
new file mode 100644
index 000000000000..e8f8cbfee6ee
--- /dev/null
+++ b/llvm/lib/Target/PowerPC/GISel/PPCCallLowering.cpp
@@ -0,0 +1,53 @@
+//===-- PPCCallLowering.h - Call lowering for GlobalISel -------*- 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 "PPCCallLowering.h"
+#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
+#include "llvm/Support/Debug.h"
+
+#define DEBUG_TYPE "ppc-call-lowering"
+
+using namespace llvm;
+
+PPCCallLowering::PPCCallLowering(const PPCTargetLowering &TLI)
+    : CallLowering(&TLI) {}
+
+bool PPCCallLowering::lowerReturn(MachineIRBuilder &MIRBuilder,
+                                  const Value *Val, ArrayRef<Register> VRegs,
+                                  FunctionLoweringInfo &FLI,
+                                  Register SwiftErrorVReg) const {
+  assert(((Val && !VRegs.empty()) || (!Val && VRegs.empty())) &&
+         "Return value without a vreg");
+  if (VRegs.size() > 0)
+    return false;
+
+  MIRBuilder.buildInstr(PPC::BLR8);
+  return true;
+}
+
+bool PPCCallLowering::lowerFormalArguments(MachineIRBuilder &MIRBuilder,
+                                           const Function &F,
+                                           ArrayRef<ArrayRef<Register>> VRegs,
+                                           FunctionLoweringInfo &FLI) const {
+
+  // If VRegs is empty, then there are no formal arguments to lower and thus can
+  // always return true. If there are formal arguments, we currently do not
+  // handle them and thus return false.
+  return VRegs.empty();
+}
+
+bool PPCCallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
+                                CallLoweringInfo &Info) const {
+  return false;
+}