carbon-language/carbon-lang
1
0
Fork 0
mirror of https://github.com/carbon-language/carbon-lang.git synced 2026-10-05 22:02:55 +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/lower/testdata/interop/cpp/debug_info.carbon
Vendored
+1 -1
View File
@@ -49,7 +49,7 @@ fn Call() -> i32 {
// CHECK:STDOUT: !llvm.errno.tbaa = !{!9}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
// CHECK:STDOUT: !1 = !DIFile(filename: "<carbon Cpp imports>", directory: "", checksumkind: CSK_MD5, checksum: "d41d8cd98f00b204e9800998ecf8427e")
// CHECK:STDOUT: !1 = !DIFile(filename: "<carbon Cpp imports>", directory: "", checksumkind: CSK_MD5, checksum: "9eecb7db59d16c80417c72d1e1f4fbf1")
// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !3 = !DIFile(filename: "debug_info.carbon", directory: "")
// CHECK:STDOUT: !4 = !{i32 7, !"Dwarf Version", i32 5}