bb3f5e1fed
Following discussions in #110443, and the following earlier discussions in https://lists.llvm.org/pipermail/llvm-dev/2017-October/117907.html, https://reviews.llvm.org/D38482, https://reviews.llvm.org/D38489, this PR attempts to overhaul the `TargetMachine` and `LLVMTargetMachine` interface classes. More specifically: 1. Makes `TargetMachine` the only class implemented under `TargetMachine.h` in the `Target` library. 2. `TargetMachine` contains target-specific interface functions that relate to IR/CodeGen/MC constructs, whereas before (at least on paper) it was supposed to have only IR/MC constructs. Any Target that doesn't want to use the independent code generator simply does not implement them, and returns either `false` or `nullptr`. 3. Renames `LLVMTargetMachine` to `CodeGenCommonTMImpl`. This renaming aims to make the purpose of `LLVMTargetMachine` clearer. Its interface was moved under the CodeGen library, to further emphasis its usage in Targets that use CodeGen directly. 4. Makes `TargetMachine` the only interface used across LLVM and its projects. With these changes, `CodeGenCommonTMImpl` is simply a set of shared function implementations of `TargetMachine`, and CodeGen users don't need to static cast to `LLVMTargetMachine` every time they need a CodeGen-specific feature of the `TargetMachine`. 5. More importantly, does not change any requirements regarding library linking. cc @arsenm @aeubanks
58 lines
2.1 KiB
C++
58 lines
2.1 KiB
C++
//=- LoongArchTargetMachine.h - Define TargetMachine for LoongArch -*- 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file declares the LoongArch specific subclass of TargetMachine.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_TARGET_LOONGARCH_LOONGARCHTARGETMACHINE_H
|
|
#define LLVM_LIB_TARGET_LOONGARCH_LOONGARCHTARGETMACHINE_H
|
|
|
|
#include "LoongArchSubtarget.h"
|
|
#include "llvm/CodeGen/CodeGenTargetMachineImpl.h"
|
|
#include <optional>
|
|
|
|
namespace llvm {
|
|
|
|
class LoongArchTargetMachine : public CodeGenTargetMachineImpl {
|
|
std::unique_ptr<TargetLoweringObjectFile> TLOF;
|
|
mutable StringMap<std::unique_ptr<LoongArchSubtarget>> SubtargetMap;
|
|
|
|
public:
|
|
LoongArchTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
|
|
StringRef FS, const TargetOptions &Options,
|
|
std::optional<Reloc::Model> RM,
|
|
std::optional<CodeModel::Model> CM, CodeGenOptLevel OL,
|
|
bool JIT);
|
|
~LoongArchTargetMachine() override;
|
|
|
|
TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
|
|
const LoongArchSubtarget *getSubtargetImpl(const Function &F) const override;
|
|
const LoongArchSubtarget *getSubtargetImpl() const = delete;
|
|
|
|
// Pass Pipeline Configuration
|
|
TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
|
|
|
|
TargetLoweringObjectFile *getObjFileLowering() const override {
|
|
return TLOF.get();
|
|
}
|
|
|
|
MachineFunctionInfo *
|
|
createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
|
|
const TargetSubtargetInfo *STI) const override;
|
|
|
|
// Addrspacecasts are always noops.
|
|
bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
|
|
return true;
|
|
}
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif // LLVM_LIB_TARGET_LOONGARCH_LOONGARCHTARGETMACHINE_H
|