mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Richard SmithandJon Ross-Perkins
bf8697113a
Per their documentation, the `llvm::Initialize*` functions are only supposed to be called by the main program, not by a library like toolchain/codegen. Fixes a hang due to a data race in multithreaded autoupdate. Add a utility class `Carbon::InitLLVM` to do the common LLVM initialization shared by all Carbon tools, optionally including initializing the LLVM targets. Because the LLVM targets add a lot of binary size, only initialize them for binaries that opt in by depending on a new target `//common:all_llvm_targets`. Also fix `//explorer:file_test` and `//explorer:file_test.trace` to share a binary rather than linking an identical binary twice. --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
|
|
// Exceptions. See /LICENSE for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
|
|
#include "toolchain/codegen/codegen.h"
|
|
|
|
#include <memory>
|
|
|
|
#include "llvm/IR/LegacyPassManager.h"
|
|
#include "llvm/MC/TargetRegistry.h"
|
|
#include "llvm/Target/TargetOptions.h"
|
|
#include "llvm/TargetParser/Host.h"
|
|
|
|
namespace Carbon {
|
|
|
|
auto CodeGen::Create(llvm::Module& module, llvm::StringRef target_triple,
|
|
llvm::raw_pwrite_stream& errors)
|
|
-> std::optional<CodeGen> {
|
|
std::string error;
|
|
const llvm::Target* target =
|
|
llvm::TargetRegistry::lookupTarget(target_triple, error);
|
|
|
|
if (!target) {
|
|
errors << "ERROR: Invalid target: " << error << "\n";
|
|
return {};
|
|
}
|
|
module.setTargetTriple(target_triple);
|
|
|
|
constexpr llvm::StringLiteral CPU = "generic";
|
|
constexpr llvm::StringLiteral Features = "";
|
|
|
|
llvm::TargetOptions target_opts;
|
|
std::optional<llvm::Reloc::Model> reloc_model;
|
|
CodeGen codegen(module, errors);
|
|
codegen.target_machine_.reset(target->createTargetMachine(
|
|
target_triple, CPU, Features, target_opts, reloc_model));
|
|
return codegen;
|
|
}
|
|
|
|
auto CodeGen::EmitAssembly(llvm::raw_pwrite_stream& out) -> bool {
|
|
return EmitCode(out, llvm::CodeGenFileType::AssemblyFile);
|
|
}
|
|
|
|
auto CodeGen::EmitObject(llvm::raw_pwrite_stream& out) -> bool {
|
|
return EmitCode(out, llvm::CodeGenFileType::ObjectFile);
|
|
}
|
|
|
|
auto CodeGen::EmitCode(llvm::raw_pwrite_stream& out,
|
|
llvm::CodeGenFileType file_type) -> bool {
|
|
module_.setDataLayout(target_machine_->createDataLayout());
|
|
|
|
// Using the legacy PM to generate the assembly since the new PM
|
|
// does not work with this yet.
|
|
// TODO: make the new PM work with the codegen pipeline.
|
|
llvm::legacy::PassManager pass;
|
|
// Note that this returns true on an error.
|
|
if (target_machine_->addPassesToEmitFile(pass, out, nullptr, file_type)) {
|
|
errors_ << "ERROR: Unable to emit to this file.\n";
|
|
return false;
|
|
}
|
|
|
|
pass.run(module_);
|
|
return true;
|
|
}
|
|
|
|
} // namespace Carbon
|