19658d1474
## Purpose This patch is one in a series of code-mods that annotate LLVM’s public interface for export. This patch annotates the `llvm/Target` library. These annotations currently have no meaningful impact on the LLVM build; however, they are a prerequisite to support an LLVM Windows DLL (shared library) build. ## Background This effort is tracked in #109483. Additional context is provided in [this discourse](https://discourse.llvm.org/t/psa-annotating-llvm-public-interface/85307), and documentation for `LLVM_ABI` and related annotations is found in the LLVM repo [here](https://github.com/llvm/llvm-project/blob/main/llvm/docs/InterfaceExportAnnotations.rst). A sub-set of these changes were generated automatically using the [Interface Definition Scanner (IDS)](https://github.com/compnerd/ids) tool, followed formatting with `git clang-format`. The bulk of this change is manual additions of `LLVM_ABI` to `LLVMInitializeX` functions defined in .cpp files under llvm/lib/Target. Adding `LLVM_ABI` to the function implementation is required here because they do not `#include "llvm/Support/TargetSelect.h"`, which contains the declarations for this functions and was already updated with `LLVM_ABI` in a previous patch. I considered patching these files with `#include "llvm/Support/TargetSelect.h"` instead, but since TargetSelect.h is a large file with a bunch of preprocessor x-macro stuff in it I was concerned it would unnecessarily impact compile times. In addition, a number of unit tests under llvm/unittests/Target required additional dependencies to make them build correctly against the LLVM DLL on Windows using MSVC. ## Validation Local builds and tests to validate cross-platform compatibility. This included llvm, clang, and lldb on the following configurations: - Windows with MSVC - Windows with Clang - Linux with GCC - Linux with Clang - Darwin with Clang
128 lines
4.3 KiB
C++
128 lines
4.3 KiB
C++
//===-- LanaiTargetMachine.cpp - Define TargetMachine for Lanai ---------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Implements the info about Lanai target spec.
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//
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//===----------------------------------------------------------------------===//
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#include "LanaiTargetMachine.h"
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#include "Lanai.h"
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#include "LanaiMachineFunctionInfo.h"
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#include "LanaiTargetObjectFile.h"
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#include "LanaiTargetTransformInfo.h"
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#include "TargetInfo/LanaiTargetInfo.h"
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#include "llvm/Analysis/TargetTransformInfo.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/CodeGen/TargetPassConfig.h"
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#include "llvm/MC/TargetRegistry.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Target/TargetOptions.h"
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#include <optional>
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using namespace llvm;
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extern "C" LLVM_ABI LLVM_EXTERNAL_VISIBILITY void LLVMInitializeLanaiTarget() {
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// Register the target.
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RegisterTargetMachine<LanaiTargetMachine> registered_target(
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getTheLanaiTarget());
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PassRegistry &PR = *PassRegistry::getPassRegistry();
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initializeLanaiAsmPrinterPass(PR);
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initializeLanaiDAGToDAGISelLegacyPass(PR);
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initializeLanaiMemAluCombinerPass(PR);
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}
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static std::string computeDataLayout() {
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// Data layout (keep in sync with clang/lib/Basic/Targets.cpp)
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return "E" // Big endian
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"-m:e" // ELF name manging
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"-p:32:32" // 32-bit pointers, 32 bit aligned
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"-i64:64" // 64 bit integers, 64 bit aligned
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"-a:0:32" // 32 bit alignment of objects of aggregate type
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"-n32" // 32 bit native integer width
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"-S64"; // 64 bit natural stack alignment
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}
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static Reloc::Model getEffectiveRelocModel(std::optional<Reloc::Model> RM) {
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return RM.value_or(Reloc::PIC_);
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}
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LanaiTargetMachine::LanaiTargetMachine(
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const Target &T, const Triple &TT, StringRef Cpu, StringRef FeatureString,
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const TargetOptions &Options, std::optional<Reloc::Model> RM,
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std::optional<CodeModel::Model> CodeModel, CodeGenOptLevel OptLevel,
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bool JIT)
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: CodeGenTargetMachineImpl(
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T, computeDataLayout(), TT, Cpu, FeatureString, Options,
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getEffectiveRelocModel(RM),
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getEffectiveCodeModel(CodeModel, CodeModel::Medium), OptLevel),
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Subtarget(TT, Cpu, FeatureString, *this, Options, getCodeModel(),
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OptLevel),
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TLOF(new LanaiTargetObjectFile()) {
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initAsmInfo();
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}
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TargetTransformInfo
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LanaiTargetMachine::getTargetTransformInfo(const Function &F) const {
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return TargetTransformInfo(std::make_unique<LanaiTTIImpl>(this, F));
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}
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MachineFunctionInfo *LanaiTargetMachine::createMachineFunctionInfo(
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BumpPtrAllocator &Allocator, const Function &F,
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const TargetSubtargetInfo *STI) const {
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return LanaiMachineFunctionInfo::create<LanaiMachineFunctionInfo>(Allocator,
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F, STI);
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}
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namespace {
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// Lanai Code Generator Pass Configuration Options.
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class LanaiPassConfig : public TargetPassConfig {
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public:
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LanaiPassConfig(LanaiTargetMachine &TM, PassManagerBase *PassManager)
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: TargetPassConfig(TM, *PassManager) {}
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LanaiTargetMachine &getLanaiTargetMachine() const {
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return getTM<LanaiTargetMachine>();
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}
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void addIRPasses() override;
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bool addInstSelector() override;
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void addPreSched2() override;
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void addPreEmitPass() override;
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};
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} // namespace
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TargetPassConfig *
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LanaiTargetMachine::createPassConfig(PassManagerBase &PassManager) {
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return new LanaiPassConfig(*this, &PassManager);
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}
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void LanaiPassConfig::addIRPasses() {
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addPass(createAtomicExpandLegacyPass());
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TargetPassConfig::addIRPasses();
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}
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// Install an instruction selector pass.
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bool LanaiPassConfig::addInstSelector() {
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addPass(createLanaiISelDag(getLanaiTargetMachine()));
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return false;
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}
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// Implemented by targets that want to run passes immediately before
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// machine code is emitted.
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void LanaiPassConfig::addPreEmitPass() {
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addPass(createLanaiDelaySlotFillerPass(getLanaiTargetMachine()));
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}
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// Run passes after prolog-epilog insertion and before the second instruction
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// scheduling pass.
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void LanaiPassConfig::addPreSched2() {
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addPass(createLanaiMemAluCombinerPass());
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}
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