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Create a Clang module per Carbon file. (#7594)

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This isolates the C++ imports in different Carbon files from each other
in `--share-cpp-ast` mode, so that a Carbon file can only see the
portions of the shared Clang `ASTContext` that it actually imported.

Assisted-by: Gemini via Antigravity
This commit is contained in:
Richard Smith
2026-07-31 22:43:56 +00:00
committed by GitHub
parent a5f3d45717
commit 46b5482bb4
7 changed files with 187 additions and 77 deletions
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toolchain/check/testdata/interop/cpp/function/export/thunk_ast.carbon
Vendored
+11 -10
View File
@@ -38,16 +38,17 @@ fn F(i: i32) -> i32 {
// CHECK:STDOUT: | | `-DeclRefExpr {{0x[a-f0-9]+}} <col:21> 'int' lvalue Var {{0x[a-f0-9]+}} 'return_storage' 'int'
// CHECK:STDOUT: | |-AlwaysInlineAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit always_inline
// CHECK:STDOUT: | `-InternalLinkageAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit
// CHECK:STDOUT: `-FunctionDecl {{0x[a-f0-9]+}} <line:37:1, line:39:1> line:37:5 G 'int (int)' external-linkage
// CHECK:STDOUT: |-ParmVarDecl {{0x[a-f0-9]+}} <col:7, col:11> col:11 used i 'int'
// CHECK:STDOUT: `-CompoundStmt {{0x[a-f0-9]+}} <col:14, line:39:1>
// CHECK:STDOUT: `-ReturnStmt {{0x[a-f0-9]+}} <line:38:3, col:21>
// CHECK:STDOUT: `-CallExpr {{0x[a-f0-9]+}} <col:10, col:21> 'int'
// CHECK:STDOUT: |-ImplicitCastExpr {{0x[a-f0-9]+}} <col:10, col:18> 'int (*)(int)' <FunctionToPointerDecay>
// CHECK:STDOUT: | `-DeclRefExpr {{0x[a-f0-9]+}} <col:10, col:18> 'int (int)' lvalue Function {{0x[a-f0-9]+}} 'F' 'int (int)'
// CHECK:STDOUT: | `-NestedNameSpecifier Namespace {{0x[a-f0-9]+}} 'Carbon'
// CHECK:STDOUT: `-ImplicitCastExpr {{0x[a-f0-9]+}} <col:20> 'int' <LValueToRValue>
// CHECK:STDOUT: `-DeclRefExpr {{0x[a-f0-9]+}} <col:20> 'int' lvalue ParmVar {{0x[a-f0-9]+}} 'i' 'int'
// CHECK:STDOUT: |-FunctionDecl {{0x[a-f0-9]+}} <line:38:1, line:40:1> line:38:5 in thunk_with_args_and_return.carbon hidden G 'int (int)' external-linkage
// CHECK:STDOUT: | |-ParmVarDecl {{0x[a-f0-9]+}} <col:7, col:11> col:11 in thunk_with_args_and_return.carbon hidden used i 'int'
// CHECK:STDOUT: | `-CompoundStmt {{0x[a-f0-9]+}} <col:14, line:40:1>
// CHECK:STDOUT: | `-ReturnStmt {{0x[a-f0-9]+}} <line:39:3, col:21>
// CHECK:STDOUT: | `-CallExpr {{0x[a-f0-9]+}} <col:10, col:21> 'int'
// CHECK:STDOUT: | |-ImplicitCastExpr {{0x[a-f0-9]+}} <col:10, col:18> 'int (*)(int)' <FunctionToPointerDecay>
// CHECK:STDOUT: | | `-DeclRefExpr {{0x[a-f0-9]+}} <col:10, col:18> 'int (int)' lvalue Function {{0x[a-f0-9]+}} 'F' 'int (int)'
// CHECK:STDOUT: | | `-NestedNameSpecifier Namespace {{0x[a-f0-9]+}} 'Carbon'
// CHECK:STDOUT: | `-ImplicitCastExpr {{0x[a-f0-9]+}} <col:20> 'int' <LValueToRValue>
// CHECK:STDOUT: | `-DeclRefExpr {{0x[a-f0-9]+}} <col:20> 'int' lvalue ParmVar {{0x[a-f0-9]+}} 'i' 'int'
// CHECK:STDOUT: `-ImportDecl {{0x[a-f0-9]+}} <line:41:4> col:4 in thunk_with_args_and_return.carbon implicit thunk_with_args_and_return.carbon
return i;
}
toolchain/check/testdata/interop/cpp/function/import/thunk_ast.carbon
Vendored
+32 -29
View File
@@ -18,24 +18,21 @@
// --- thunk_required.h
auto foo(short a) -> void;
// CHECK:STDOUT: |-FunctionDecl {{0x[a-f0-9]+}} <./thunk_required.h:[[@LINE-1]]:1, col:22> col:6 used foo 'auto (short) -> void' external-linkage
// CHECK:STDOUT: | `-ParmVarDecl {{0x[a-f0-9]+}} <col:10, col:16> col:16 a 'short'
// CHECK:STDOUT: `-FunctionDecl {{0x[a-f0-9]+}} <col:6> col:6 foo__carbon_thunk 'void (short * _Nonnull)' inline internal-linkage
// CHECK:STDOUT: |-ParmVarDecl {{0x[a-f0-9]+}} <col:6> col:6 used a 'short * _Nonnull':'short *'
// CHECK:STDOUT: |-ReturnStmt {{0x[a-f0-9]+}} <col:6>
// CHECK:STDOUT: | `-CallExpr {{0x[a-f0-9]+}} <col:6> 'void'
// CHECK:STDOUT: | |-ImplicitCastExpr {{0x[a-f0-9]+}} <col:6> 'auto (*)(short) -> void' <FunctionToPointerDecay>
// CHECK:STDOUT: | | `-DeclRefExpr {{0x[a-f0-9]+}} <col:6> 'auto (short) -> void' Function {{0x[a-f0-9]+}} 'foo' 'auto (short) -> void'
// CHECK:STDOUT: | `-ImplicitCastExpr {{0x[a-f0-9]+}} <col:6> 'short' <LValueToRValue>
// CHECK:STDOUT: | `-UnaryOperator {{0x[a-f0-9]+}} <col:6> 'short' lvalue prefix '*' cannot overflow
// CHECK:STDOUT: | `-ImplicitCastExpr {{0x[a-f0-9]+}} <col:6> 'short * _Nonnull':'short *' <LValueToRValue>
// CHECK:STDOUT: | `-DeclRefExpr {{0x[a-f0-9]+}} <col:6> 'short * _Nonnull':'short *' lvalue ParmVar {{0x[a-f0-9]+}} 'a' 'short * _Nonnull':'short *'
// CHECK:STDOUT: |-AlwaysInlineAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit always_inline
// CHECK:STDOUT: |-InternalLinkageAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit
// CHECK:STDOUT: `-AsmLabelAttr {{0x[a-f0-9]+}} <col:6> Implicit "_Z3foos.carbon_thunk._"
// CHECK:STDOUT: TranslationUnitDecl {{0x[a-f0-9]+}} <<invalid sloc>> <invalid sloc>
// CHECK:STDOUT: |-EmptyDecl {{0x[a-f0-9]+}} <<carbon Cpp imports>:1:1> col:1
// CHECK:STDOUT: |-NamespaceDecl {{0x[a-f0-9]+}} <<invalid sloc>> <invalid sloc> Carbon external-linkage
// CHECK:STDOUT: |-FunctionDecl {{0x[a-f0-9]+}} <./thunk_required.h:[[@LINE-1]]:1, col:22> col:6 in import_thunk_required.carbon hidden used foo 'auto (short) -> void' external-linkage
// CHECK:STDOUT: | `-ParmVarDecl {{0x[a-f0-9]+}} <col:10, col:16> col:16 in import_thunk_required.carbon hidden a 'short'
// CHECK:STDOUT: |-FunctionDecl {{0x[a-f0-9]+}} <col:6> col:6 in import_thunk_required.carbon hidden foo__carbon_thunk 'void (short * _Nonnull)' inline internal-linkage
// CHECK:STDOUT: | |-ParmVarDecl {{0x[a-f0-9]+}} <col:6> col:6 in import_thunk_required.carbon hidden used a 'short * _Nonnull':'short *'
// CHECK:STDOUT: | |-ReturnStmt {{0x[a-f0-9]+}} <col:6>
// CHECK:STDOUT: | | `-CallExpr {{0x[a-f0-9]+}} <col:6> 'void'
// CHECK:STDOUT: | | |-ImplicitCastExpr {{0x[a-f0-9]+}} <col:6> 'auto (*)(short) -> void' <FunctionToPointerDecay>
// CHECK:STDOUT: | | | `-DeclRefExpr {{0x[a-f0-9]+}} <col:6> 'auto (short) -> void' Function {{0x[a-f0-9]+}} 'foo' 'auto (short) -> void'
// CHECK:STDOUT: | | `-ImplicitCastExpr {{0x[a-f0-9]+}} <col:6> 'short' <LValueToRValue>
// CHECK:STDOUT: | | `-UnaryOperator {{0x[a-f0-9]+}} <col:6> 'short' lvalue prefix '*' cannot overflow
// CHECK:STDOUT: | | `-ImplicitCastExpr {{0x[a-f0-9]+}} <col:6> 'short * _Nonnull':'short *' <LValueToRValue>
// CHECK:STDOUT: | | `-DeclRefExpr {{0x[a-f0-9]+}} <col:6> 'short * _Nonnull':'short *' lvalue ParmVar {{0x[a-f0-9]+}} 'a' 'short * _Nonnull':'short *'
// CHECK:STDOUT: | |-AlwaysInlineAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit always_inline
// CHECK:STDOUT: | |-InternalLinkageAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit
// CHECK:STDOUT: | `-AsmLabelAttr {{0x[a-f0-9]+}} <col:6> Implicit "_Z3foos.carbon_thunk._"
// --- import_thunk_required.carbon
@@ -47,20 +44,24 @@ fn F() {
Cpp.foo(1 as i16);
}
// CHECK:STDOUT: `-ImportDecl {{0x[a-f0-9]+}} <import_thunk_required.carbon:[[@LINE+3]]:104> col:104 in import_thunk_required.carbon implicit import_thunk_required.carbon
// CHECK:STDOUT: TranslationUnitDecl {{0x[a-f0-9]+}} <<invalid sloc>> <invalid sloc>
// CHECK:STDOUT: |-EmptyDecl {{0x[a-f0-9]+}} <<carbon Cpp imports>:1:1> col:1
// CHECK:STDOUT: |-NamespaceDecl {{0x[a-f0-9]+}} <<invalid sloc>> <invalid sloc> Carbon external-linkage
// --- return_thunk_required.h
auto foo() -> short;
// CHECK:STDOUT: |-FunctionDecl {{0x[a-f0-9]+}} <./return_thunk_required.h:[[@LINE-1]]:1, col:15> col:6 used foo 'auto () -> short' external-linkage
// CHECK:STDOUT: `-FunctionDecl {{0x[a-f0-9]+}} <col:6> col:6 foo__carbon_thunk 'void (short * _Nonnull)' inline internal-linkage
// CHECK:STDOUT: |-ParmVarDecl {{0x[a-f0-9]+}} <col:6> col:6 used return 'short * _Nonnull':'short *'
// CHECK:STDOUT: |-CXXNewExpr {{0x[a-f0-9]+}} <col:6> 'short *' global Function {{0x[a-f0-9]+}} 'operator new' 'void *(__size_t, void *) noexcept'
// CHECK:STDOUT: | |-CallExpr {{0x[a-f0-9]+}} <col:6> 'short'
// CHECK:STDOUT: | | `-ImplicitCastExpr {{0x[a-f0-9]+}} <col:6> 'auto (*)() -> short' <FunctionToPointerDecay>
// CHECK:STDOUT: | | `-DeclRefExpr {{0x[a-f0-9]+}} <col:6> 'auto () -> short' Function {{0x[a-f0-9]+}} 'foo' 'auto () -> short'
// CHECK:STDOUT: | `-DeclRefExpr {{0x[a-f0-9]+}} <col:6> 'short * _Nonnull':'short *' lvalue ParmVar {{0x[a-f0-9]+}} 'return' 'short * _Nonnull':'short *'
// CHECK:STDOUT: |-AlwaysInlineAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit always_inline
// CHECK:STDOUT: |-InternalLinkageAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit
// CHECK:STDOUT: `-AsmLabelAttr {{0x[a-f0-9]+}} <col:6> Implicit "_Z3foov.carbon_thunk."
// CHECK:STDOUT: |-FunctionDecl {{0x[a-f0-9]+}} <./return_thunk_required.h:[[@LINE-1]]:1, col:15> col:6 in import_return_thunk_required.carbon hidden used foo 'auto () -> short' external-linkage
// CHECK:STDOUT: |-FunctionDecl {{0x[a-f0-9]+}} <col:6> col:6 in import_return_thunk_required.carbon hidden foo__carbon_thunk 'void (short * _Nonnull)' inline internal-linkage
// CHECK:STDOUT: | |-ParmVarDecl {{0x[a-f0-9]+}} <col:6> col:6 in import_return_thunk_required.carbon hidden used return 'short * _Nonnull':'short *'
// CHECK:STDOUT: | |-CXXNewExpr {{0x[a-f0-9]+}} <col:6> 'short *' global Function {{0x[a-f0-9]+}} 'operator new' 'void *(__size_t, void *) noexcept'
// CHECK:STDOUT: | | |-CallExpr {{0x[a-f0-9]+}} <col:6> 'short'
// CHECK:STDOUT: | | | `-ImplicitCastExpr {{0x[a-f0-9]+}} <col:6> 'auto (*)() -> short' <FunctionToPointerDecay>
// CHECK:STDOUT: | | | `-DeclRefExpr {{0x[a-f0-9]+}} <col:6> 'auto () -> short' Function {{0x[a-f0-9]+}} 'foo' 'auto () -> short'
// CHECK:STDOUT: | | `-DeclRefExpr {{0x[a-f0-9]+}} <col:6> 'short * _Nonnull':'short *' lvalue ParmVar {{0x[a-f0-9]+}} 'return' 'short * _Nonnull':'short *'
// CHECK:STDOUT: | |-AlwaysInlineAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit always_inline
// CHECK:STDOUT: | |-InternalLinkageAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit
// CHECK:STDOUT: | `-AsmLabelAttr {{0x[a-f0-9]+}} <col:6> Implicit "_Z3foov.carbon_thunk."
// --- import_return_thunk_required.carbon
@@ -71,3 +72,5 @@ import Cpp library "return_thunk_required.h";
fn F() -> i16 {
return Cpp.foo();
}
// CHECK:STDOUT: `-ImportDecl {{0x[a-f0-9]+}} <import_return_thunk_required.carbon:[[@LINE+0]]:191> col:191 in import_return_thunk_required.carbon implicit import_return_thunk_required.carbon