carbon-language/carbon-lang
1
0
Fork 0
mirror of https://github.com/carbon-language/carbon-lang.git synced 2026-10-06 09:34:42 +01:00
Code Issues Packages Projects Releases 10 Wiki Activity

Add a flag to build a single ASTContext shared across all compilations (#7567)

Browse Source 
Instead of building one Clang `ASTContext` per compilation, the
`--share-cpp-ast` flag causes us to build a single `ASTContext` and
share it across all contexts. One new abstraction is added: `CppDomain`
represents the Carbon-side view of a Clang AST that might be shared
across multiple `SemIR::File`s. This object owns the Clang instance and
the AST.

For now, we have no isolation between the C++ state exposed to different
Carbon compilations, and we have no multiplexing of generated LLVM IR
from C++ into different Carbon compilations, so the mode is not usable
yet. The plan is to keep it behind a flag until it's ready.

Assisted-by: Gemini via Antigravity
This commit is contained in:
Richard Smith
2026-07-28 00:19:40 +00:00
committed by GitHub
parent 4e77f9b6c8
commit 7d89ac98c7
25 changed files with 449 additions and 211 deletions
Download Patch File Download Diff File Expand all files Collapse all files
toolchain/driver/compile_driver.cpp
+1
View File
@@ -608,6 +608,7 @@ auto CompileDriver::Compile(DriverEnv& driver_env) -> DriverResult {
options.vlog_stream = driver_env.vlog_stream;
options.fuzzing = driver_env.fuzzing;
options.mangle_string_fingerprint = options_->mangle_string_fingerprint;
options.share_cpp_ast = options_->share_cpp_ast;
if (options.vlog_stream || options_->dump_sem_ir || options_->dump_cpp_ast ||
options_->dump_raw_sem_ir) {
options.include_in_dumps = &cache_->include_in_dumps();