mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-04 22:02:52 +01:00
Boaz Brickner
852d0191a9
This requires:
* Making `FunctionDecl` mutable since generating code
(`HandleTopLevelDecl()`) requires a mutable declaration and since we
manually add `used` attribute to force code generation.
* Passing the file system to `Lower` since it's needed by Clang code
generation.
* Creating an internal Clang LLVM module and link it against the Carbon
LLVM module.
Demo:
```c++
// hello_world.h
extern int puts;
inline void hello_world() {
((int (*)(const char*))&puts)("hello world");
}
```
```carbon
// main.carbon
library "Main";
import Cpp library "hello_world.h";
fn Run() -> i32 {
Cpp.hello_world();
return 0;
}
```
```shell
$ bazel-bin/toolchain/carbon compile main.carbon
$ bazel-bin/toolchain/carbon link main.o --output=demo
$ ./demo
hello world
```
Based on https://github.com/carbon-language/carbon-lang/pull/5406.
Part of #5405.
44 lines
1.5 KiB
C++
44 lines
1.5 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_CHECK_CHECK_H_
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#define CARBON_TOOLCHAIN_CHECK_CHECK_H_
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#include "common/ostream.h"
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#include "toolchain/base/shared_value_stores.h"
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#include "toolchain/base/timings.h"
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#include "toolchain/check/diagnostic_emitter.h"
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#include "toolchain/diagnostics/diagnostic_emitter.h"
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#include "toolchain/parse/tree_and_subtrees.h"
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#include "toolchain/sem_ir/file.h"
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namespace Carbon::Check {
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// Checking information that's tracked per file.
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struct Unit {
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Diagnostics::Consumer* consumer;
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SharedValueStores* value_stores;
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// The `timings` may be null if nothing is to be recorded.
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Timings* timings;
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// The unit's SemIR, provided as empty and filled in by CheckParseTrees.
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SemIR::File* sem_ir;
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// The Clang AST owned by `CompileSubcommand`.
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std::unique_ptr<clang::ASTUnit>* cpp_ast = nullptr;
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};
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// Checks a group of parse trees. This will use imports to decide the order of
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// checking.
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auto CheckParseTrees(
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llvm::MutableArrayRef<Unit> units,
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llvm::ArrayRef<Parse::GetTreeAndSubtreesFn> tree_and_subtrees_getters,
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bool prelude_import, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> fs,
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llvm::StringRef target, llvm::raw_ostream* vlog_stream, bool fuzzing)
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-> void;
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} // namespace Carbon::Check
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#endif // CARBON_TOOLCHAIN_CHECK_CHECK_H_
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