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Add a flag to dump the C++ AST (#5918)

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Use it to dump the AST that includes a generated C++ thunk.
Based on #5917.

Also added printing of the full actual text when check fails to make
debugging easier.
Changed line replacement to allow removing complete lines.

Part of #5514.
This commit is contained in:
Boaz Brickner
2025-08-07 17:09:30 +00:00
committed by GitHub
parent 0f171611d4
commit 52ed26235d
10 changed files with 141 additions and 20 deletions
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toolchain/check/testdata/interop/cpp/function/full_semir.carbon
Vendored
+13 -14
View File
@@ -26,7 +26,6 @@ library "[[@TEST_NAME]]";
import Cpp library "short_param.h";
fn F() {
// TODO: Find a way to test the full C++ thunk AST.
Cpp.foo(1 as i16);
}
@@ -168,21 +167,21 @@ fn F() {
// CHECK:STDOUT: %int_16: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
// CHECK:STDOUT: %i16: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
// CHECK:STDOUT: %impl.elem0: %.91d = impl_witness_access constants.%As.impl_witness.0ef, element0 [concrete = constants.%Core.IntLiteral.as.As.impl.Convert.489]
// CHECK:STDOUT: %bound_method.loc8_13.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Core.IntLiteral.as.As.impl.Convert.bound]
// CHECK:STDOUT: %bound_method.loc7_13.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Core.IntLiteral.as.As.impl.Convert.bound]
// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @Core.IntLiteral.as.As.impl.Convert(constants.%int_16) [concrete = constants.%Core.IntLiteral.as.As.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc8_13.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
// CHECK:STDOUT: %Core.IntLiteral.as.As.impl.Convert.call: init %i16 = call %bound_method.loc8_13.2(%int_1) [concrete = constants.%int_1.f90]
// CHECK:STDOUT: %.loc8_13.1: %i16 = value_of_initializer %Core.IntLiteral.as.As.impl.Convert.call [concrete = constants.%int_1.f90]
// CHECK:STDOUT: %.loc8_13.2: %i16 = converted %int_1, %.loc8_13.1 [concrete = constants.%int_1.f90]
// CHECK:STDOUT: %.loc8_19.1: ref %i16 = temporary_storage
// CHECK:STDOUT: %.loc8_19.2: init %i16 = initialize_from %.loc8_13.2 to %.loc8_19.1 [concrete = constants.%int_1.f90]
// CHECK:STDOUT: %addr.loc8_19.1: %ptr.251 = addr_of %.loc8_19.1
// CHECK:STDOUT: %foo__carbon_thunk.call: init %empty_tuple.type = call imports.%foo__carbon_thunk.decl(%addr.loc8_19.1)
// CHECK:STDOUT: %T.as.Destroy.impl.Op.bound: <bound method> = bound_method %.loc8_19.1, constants.%T.as.Destroy.impl.Op.507
// CHECK:STDOUT: %bound_method.loc7_13.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
// CHECK:STDOUT: %Core.IntLiteral.as.As.impl.Convert.call: init %i16 = call %bound_method.loc7_13.2(%int_1) [concrete = constants.%int_1.f90]
// CHECK:STDOUT: %.loc7_13.1: %i16 = value_of_initializer %Core.IntLiteral.as.As.impl.Convert.call [concrete = constants.%int_1.f90]
// CHECK:STDOUT: %.loc7_13.2: %i16 = converted %int_1, %.loc7_13.1 [concrete = constants.%int_1.f90]
// CHECK:STDOUT: %.loc7_19.1: ref %i16 = temporary_storage
// CHECK:STDOUT: %.loc7_19.2: init %i16 = initialize_from %.loc7_13.2 to %.loc7_19.1 [concrete = constants.%int_1.f90]
// CHECK:STDOUT: %addr.loc7_19.1: %ptr.251 = addr_of %.loc7_19.1
// CHECK:STDOUT: %foo__carbon_thunk.call: init %empty_tuple.type = call imports.%foo__carbon_thunk.decl(%addr.loc7_19.1)
// CHECK:STDOUT: %T.as.Destroy.impl.Op.bound: <bound method> = bound_method %.loc7_19.1, constants.%T.as.Destroy.impl.Op.507
// CHECK:STDOUT: %T.as.Destroy.impl.Op.specific_fn: <specific function> = specific_function constants.%T.as.Destroy.impl.Op.507, @T.as.Destroy.impl.Op(constants.%i16) [concrete = constants.%T.as.Destroy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method.loc8_19: <bound method> = bound_method %.loc8_19.1, %T.as.Destroy.impl.Op.specific_fn
// CHECK:STDOUT: %addr.loc8_19.2: %ptr.251 = addr_of %.loc8_19.1
// CHECK:STDOUT: %T.as.Destroy.impl.Op.call: init %empty_tuple.type = call %bound_method.loc8_19(%addr.loc8_19.2)
// CHECK:STDOUT: %bound_method.loc7_19: <bound method> = bound_method %.loc7_19.1, %T.as.Destroy.impl.Op.specific_fn
// CHECK:STDOUT: %addr.loc7_19.2: %ptr.251 = addr_of %.loc7_19.1
// CHECK:STDOUT: %T.as.Destroy.impl.Op.call: init %empty_tuple.type = call %bound_method.loc7_19(%addr.loc7_19.2)
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
toolchain/check/testdata/interop/cpp/function/thunk_ast.carbon
Vendored
+42
View File
@@ -0,0 +1,42 @@
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/int.carbon
// EXTRA-ARGS: --dump-cpp-ast
// SET-CHECK-SUBSET
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/interop/cpp/function/thunk_ast.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/function/thunk_ast.carbon
// CHECK:STDOUT: TranslationUnitDecl {{0x[a-f0-9]+}} <<invalid sloc>> <invalid sloc>
// --- 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'
// 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 'auto (short * _Nonnull) -> void' extern
// 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: `-AsmLabelAttr {{0x[a-f0-9]+}} <col:6> Implicit "_Z3foos.carbon_thunk"
// --- import_thunk_required.carbon
library "[[@TEST_NAME]]";
import Cpp library "thunk_required.h";
fn F() {
Cpp.foo(1 as i16);
}