1 //===-- PPCCallLowering.h - Call lowering for GlobalISel -------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 /// 9 /// \file 10 /// This file implements the lowering of LLVM calls to machine code calls for 11 /// GlobalISel. 12 /// 13 //===----------------------------------------------------------------------===// 14 15 #include "PPCCallLowering.h" 16 #include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h" 17 #include "llvm/Support/Debug.h" 18 19 #define DEBUG_TYPE "ppc-call-lowering" 20 21 using namespace llvm; 22 23 PPCCallLowering::PPCCallLowering(const PPCTargetLowering &TLI) 24 : CallLowering(&TLI) {} 25 26 bool PPCCallLowering::lowerReturn(MachineIRBuilder &MIRBuilder, 27 const Value *Val, ArrayRef<Register> VRegs, 28 FunctionLoweringInfo &FLI, 29 Register SwiftErrorVReg) const { 30 assert(((Val && !VRegs.empty()) || (!Val && VRegs.empty())) && 31 "Return value without a vreg"); 32 if (VRegs.size() > 0) 33 return false; 34 35 MIRBuilder.buildInstr(PPC::BLR8); 36 return true; 37 } 38 39 bool PPCCallLowering::lowerFormalArguments(MachineIRBuilder &MIRBuilder, 40 const Function &F, 41 ArrayRef<ArrayRef<Register>> VRegs, 42 FunctionLoweringInfo &FLI) const { 43 44 // If VRegs is empty, then there are no formal arguments to lower and thus can 45 // always return true. If there are formal arguments, we currently do not 46 // handle them and thus return false. 47 return VRegs.empty(); 48 } 49 50 bool PPCCallLowering::lowerCall(MachineIRBuilder &MIRBuilder, 51 CallLoweringInfo &Info) const { 52 return false; 53 } 54