mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 20:23:11 +01:00
f0d6cc1d99
If the return values can't be lowered to registers SelectionDAG performs the sret demotion. This patch contains the basic implementation for the same in the GlobalISel pipeline. Furthermore, targets should bring relevant changes during lowerFormalArguments, lowerReturn and lowerCall to make use of this feature. Reviewed By: arsenm Differential Revision: https://reviews.llvm.org/D92953
55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
//===- llvm/lib/Target/X86/X86CallLowering.h - Call lowering ----*- 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 describes how to lower LLVM calls to machine code calls.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_TARGET_X86_X86CALLLOWERING_H
|
|
#define LLVM_LIB_TARGET_X86_X86CALLLOWERING_H
|
|
|
|
#include "llvm/CodeGen/GlobalISel/CallLowering.h"
|
|
#include <functional>
|
|
|
|
namespace llvm {
|
|
|
|
template <typename T> class ArrayRef;
|
|
class DataLayout;
|
|
class MachineRegisterInfo;
|
|
class X86TargetLowering;
|
|
|
|
class X86CallLowering : public CallLowering {
|
|
public:
|
|
X86CallLowering(const X86TargetLowering &TLI);
|
|
|
|
bool lowerReturn(MachineIRBuilder &MIRBuilder, const Value *Val,
|
|
ArrayRef<Register> VRegs,
|
|
FunctionLoweringInfo &FLI) const override;
|
|
|
|
bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
|
|
ArrayRef<ArrayRef<Register>> VRegs,
|
|
FunctionLoweringInfo &FLI) const override;
|
|
|
|
bool lowerCall(MachineIRBuilder &MIRBuilder,
|
|
CallLoweringInfo &Info) const override;
|
|
|
|
private:
|
|
/// A function of this type is used to perform value split action.
|
|
using SplitArgTy = std::function<void(ArrayRef<Register>)>;
|
|
|
|
bool splitToValueTypes(const ArgInfo &OrigArgInfo,
|
|
SmallVectorImpl<ArgInfo> &SplitArgs,
|
|
const DataLayout &DL, MachineRegisterInfo &MRI,
|
|
SplitArgTy SplitArg) const;
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif // LLVM_LIB_TARGET_X86_X86CALLLOWERING_H
|