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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>
23 lines
745 B
C++
23 lines
745 B
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 "common/init_llvm.h"
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#include "llvm/Support/TargetSelect.h"
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namespace Carbon {
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static auto InitLLVMTargets() -> void {
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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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}
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// On program startup, set `InitLLVM::InitializeTargets` to be our
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// initialization function so that `InitLLVM` can call it at the right moment.
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char InitLLVM::RegisterTargets = (InitializeTargets = &InitLLVMTargets, 0);
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} // namespace Carbon
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