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037196f69f
This pr creates the object file for the carbon code that returns either 0 or 1. The command to convert the object code to binary is `clang <object_file_name> -o <binary_name>` --------- Co-authored-by: Farzana Ahmed Siddique <fasiddique@google.com> Co-authored-by: Richard Smith <richard@metafoo.co.uk>
90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "toolchain/codegen/codegen.h"
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#include <cstdio>
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#include <memory>
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#include "llvm/IR/LegacyPassManager.h"
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#include "llvm/MC/TargetRegistry.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Target/TargetOptions.h"
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#include "llvm/TargetParser/Host.h"
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namespace Carbon {
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auto CodeGen::CreateTargetMachine() -> std::unique_ptr<llvm::TargetMachine> {
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// Initialize the target registry etc.
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llvm::InitializeAllTargetInfos();
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llvm::InitializeAllTargets();
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llvm::InitializeAllTargetMCs();
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llvm::InitializeAllAsmParsers();
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llvm::InitializeAllAsmPrinters();
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std::string error;
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llvm::StringRef triple = target_triple;
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std::string host_triple;
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if (target_triple.empty()) {
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host_triple = llvm::sys::getDefaultTargetTriple();
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triple = host_triple;
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}
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const auto* target = llvm::TargetRegistry::lookupTarget(triple, error);
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if (!target) {
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error_stream_ << "ERROR: Invalid -target_triple: " << error << "\n";
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return nullptr;
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}
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constexpr llvm::StringLiteral CPU = "generic";
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constexpr llvm::StringLiteral Features = "";
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llvm::TargetOptions target_opts;
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std::optional<llvm::Reloc::Model> reloc_model;
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std::unique_ptr<llvm::TargetMachine> target_machine(
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target->createTargetMachine(target_triple, CPU, Features, target_opts,
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reloc_model));
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return target_machine;
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}
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auto CodeGen::EmitCode(llvm::raw_pwrite_stream& dest,
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llvm::TargetMachine* target_machine,
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llvm::CodeGenFileType file_type) -> bool {
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Module.setDataLayout(target_machine->createDataLayout());
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Module.setTargetTriple(target_triple);
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// Using the legacy PM to generate the assembly since the new PM
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// does not work with this yet.
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// TODO: make the new PM work with the codegen pipeline.
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llvm::legacy::PassManager pass;
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if (target_machine->addPassesToEmitFile(pass, dest, nullptr, file_type)) {
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error_stream_ << "Error: Nothing to write to object file\n";
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return false;
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}
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pass.run(Module);
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return true;
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}
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auto CodeGen::PrintAssembly() -> bool {
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auto target_machine = CreateTargetMachine();
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if (target_machine == nullptr) {
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return false;
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}
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return EmitCode(output_stream_, target_machine.get(),
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llvm::CodeGenFileType::CGFT_AssemblyFile);
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}
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auto CodeGen::GenerateObjectCode() -> bool {
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auto target_machine = CreateTargetMachine();
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if (target_machine == nullptr) {
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return false;
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}
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return EmitCode(output_stream_, target_machine.get(),
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llvm::CodeGenFileType::CGFT_ObjectFile);
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}
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} // namespace Carbon
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