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https://github.com/carbon-language/carbon-lang.git
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Chandler CarruthandGeoff Romer
1459332031
This adds support for most of the remaining LLVM command line tools using a generic, generated wrapper. The subcommand interface for these is (much) less interesting than our other subcommands, but it gives us a uniform and consistent layer. Note that I structured these as nested sub-sub-commands below an `llvm` subcommand because of an expectation that we will want to add more, and ones that don't use this generic layer. Some concrete future work: - Add the `opt` and `llc` tools as subcommands for easier debugging and experimentation with LLVM IR output from Carbon's toolchain. - Potentially sink `lld` below the `llvm` layer given that it has significantly less user visibility than commands like `clang`. Unfortunately, the current driver subcommand APIs make nested subcommands awkward. I've added a somewhat rough hack here to let the LLVM tools go in, but there are some TODOs that I want to address in a follow-up that works to adjust the structure of this code to be more conducive to nesting like this. Depends on #5048 -- only the last commit should be reviewed here. --------- Co-authored-by: Geoff Romer <gromer@google.com>
60 lines
1.9 KiB
C++
60 lines
1.9 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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#ifndef CARBON_TOOLCHAIN_DRIVER_LLVM_SUBCOMMAND_H_
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#define CARBON_TOOLCHAIN_DRIVER_LLVM_SUBCOMMAND_H_
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#include "common/command_line.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringRef.h"
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#include "toolchain/base/llvm_tools.h"
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#include "toolchain/driver/driver_env.h"
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#include "toolchain/driver/driver_subcommand.h"
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namespace Carbon {
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// Options for the LLVM subcommand.
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//
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// See the implementation of `Build` for documentation on members.
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struct LLVMOptions {
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// Build the LLVM subcommand options using `b`.
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//
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// When this top-level subcommand is selected (potentially through a nested
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// sub-subcommand), the `selected_subcommand` will be set to point to
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// `subcommand` to reflect that.
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auto Build(CommandLine::CommandBuilder& b, DriverSubcommand* subcommand,
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DriverSubcommand** selected_subcommand) -> void;
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LLVMTool subcommand_tool;
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llvm::SmallVector<llvm::StringRef> args;
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};
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// Implement the LLVM subcommand of the driver.
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//
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// This provides access to the full collection of LLVM command line tools.
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class LLVMSubcommand : public DriverSubcommand {
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public:
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explicit LLVMSubcommand();
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// The LLVM subcommand uses a custom subcommand structure, so `BuildOptions`
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// is a no-op and we override the more complex layer.
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auto BuildOptions(CommandLine::CommandBuilder& /*b*/) -> void override {
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CARBON_FATAL("Unused.");
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}
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auto BuildOptionsAndSetAction(CommandLine::CommandBuilder& b,
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DriverSubcommand** selected_subcommand)
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-> void override {
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options_.Build(b, this, selected_subcommand);
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}
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auto Run(DriverEnv& driver_env) -> DriverResult override;
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private:
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LLVMOptions options_;
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};
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} // namespace Carbon
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#endif // CARBON_TOOLCHAIN_DRIVER_LLVM_SUBCOMMAND_H_
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