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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/testing/file_test.cpp
+29
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@@ -263,6 +263,32 @@ auto ToolchainFileTest::GetLineNumberReplacements(
return replacements;
}
// For Clang AST dump lines, we remove references to builtins because they're
// inconsistent between systems and replace the ids since they're inconsistent
// between runs.
static auto DoClangASTCheckReplacements(std::string& check_line) -> void {
static constexpr llvm::StringRef ClangDeclIdRegex = "0x[a-f0-9]+";
static const RE2 is_clang_ast_line_re(
R"(^// CHECK:STDOUT: (TranslationUnitDecl|[ |]*`?\-))");
if (!RE2::PartialMatch(check_line, is_clang_ast_line_re)) {
return;
}
// Filter out references to builtins.
static const RE2 is_builtin_referring_re(
R"(`-BuiltinType |[ ']__[a-zA-Z]|\| `\-PointerType 0x[a-f0-9]+ 'char \*'$)");
if (RE2::PartialMatch(check_line, is_builtin_referring_re)) {
check_line.clear();
return;
}
// Replace the ids.
static const RE2 clang_decl_id_re(llvm::formatv(" {0} ", ClangDeclIdRegex));
static const std::string& clang_decl_id_replacement =
*new std::string(llvm::formatv(" {{{{{0}}} ", ClangDeclIdRegex));
RE2::GlobalReplace(&check_line, clang_decl_id_re, clang_decl_id_replacement);
}
auto ToolchainFileTest::DoExtraCheckReplacements(std::string& check_line) const
-> void {
if (component_ == "driver") {
@@ -286,6 +312,9 @@ auto ToolchainFileTest::DoExtraCheckReplacements(std::string& check_line) const
// package to the VFS with a fixed name.
absl::StrReplaceAll({{data_->installation.core_package(), "{{.*}}"}},
&check_line);
if (component_ == "check") {
DoClangASTCheckReplacements(check_line);
}
} else {
FileTestBase::DoExtraCheckReplacements(check_line);
}