[Clang] Diagnose apply AST consume actions on LLVM IR (#88602)

Fixes #88522

This PR introduce a new diagnostic to report apply AST consume actions
on LLVM IR.

---------

Signed-off-by: yronglin <[email protected]>

Author: yronglin

clang/include/clang/Basic/DiagnosticFrontendKinds.td

@@ -370,4 +370,7 @@ def warn_missing_symbol_graph_dir : Warning<
   "Missing symbol graph output directory, defaulting to working directory">,
   InGroup<ExtractAPIMisuse>;
 
+def err_ast_action_on_llvm_ir : Error<
+  "cannot apply AST actions to LLVM IR file '%0'">,
+  DefaultFatal;
 }

clang/lib/Frontend/FrontendAction.cpp

@@ -757,8 +757,11 @@ bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
 
   // IR files bypass the rest of initialization.
   if (Input.getKind().getLanguage() == Language::LLVM_IR) {
-    assert(hasIRSupport() &&
-           "This action does not have IR file support!");
+    if (!hasIRSupport()) {
+      CI.getDiagnostics().Report(diag::err_ast_action_on_llvm_ir)
+          << Input.getFile();
+      return false;
+    }
 
     // Inform the diagnostic client we are processing a source file.
     CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(), nullptr);

clang/test/Frontend/ast-dump-on-llvm.ll

@@ -0,0 +1,29 @@
+; RUN: not %clang_cc1 -triple x86_64-unknown-unknown -ast-dump %s -o - 2>&1 | FileCheck %s --check-prefix=CHECK-AST-DUMP
+; RUN: not %clang_cc1 -triple x86_64-unknown-unknown -ast-dump=json %s -o - 2>&1 | FileCheck %s --check-prefix=CHECK-AST-DUMP-EQ-JSON
+; RUN: not %clang_cc1 -triple x86_64-unknown-unknown -ast-dump=default %s -o - 2>&1 | FileCheck %s --check-prefix=CHECK-AST-DUMP-EQ-DEFAULT
+; RUN: not %clang_cc1 -triple x86_64-unknown-unknown -ast-dump-all %s -o - 2>&1 | FileCheck %s --check-prefix=CHECK-AST-DUMP-ALL
+; RUN: not %clang_cc1 -triple x86_64-unknown-unknown -ast-dump-all=json %s -o - 2>&1 | FileCheck %s --check-prefix=CHECK-AST-DUMP-ALL-EQ-JSON
+; RUN: not %clang_cc1 -triple x86_64-unknown-unknown -ast-dump-all=default %s -o - 2>&1 | FileCheck %s --check-prefix=CHECK-AST-DUMP-ALL-EQ-DEFAULT
+
+; RUN: not %clang_cc1 -triple x86_64-unknown-unknown -ast-print %s -o - 2>&1 | FileCheck %s --check-prefix=CHECK-AST-PRINT
+; RUN: not %clang_cc1 -triple x86_64-unknown-unknown -ast-view %s -o - 2>&1 | FileCheck %s --check-prefix=CHECK-AST-VIEW
+; RUN: not %clang_cc1 -triple x86_64-unknown-unknown -ast-list %s -o - 2>&1 | FileCheck %s --check-prefix=CHECK-AST-LIST
+; RUN: not %clang_cc1 -triple x86_64-unknown-unknown -ast-dump-lookups %s -o - 2>&1 | FileCheck %s --check-prefix=CHECK-AST-DUMP-LOOKUP
+; RUN: not %clang_cc1 -triple x86_64-unknown-unknown -ast-dump-filter=FunctionDecl %s -o - 2>&1 | FileCheck %s --check-prefix=CHECK-AST-DUMP-FILTER-EQ
+; RUN: not %clang_cc1 -triple x86_64-unknown-unknown -ast-dump-decl-types %s -o - 2>&1 | FileCheck %s --check-prefix=CHECK-AST-DUMP-DECL-TYPES
+; RUN: not %clang_cc1 -triple x86_64-unknown-unknown -fsyntax-only %s -o - 2>&1 | FileCheck %s --check-prefix=CHECK-SYNTAX-ONLY
+
+
+; CHECK-AST-DUMP: fatal error: cannot apply AST actions to LLVM IR file '{{.*}}'
+; CHECK-AST-DUMP-EQ-JSON: fatal error: cannot apply AST actions to LLVM IR file '{{.*}}'
+; CHECK-AST-DUMP-EQ-DEFAULT: fatal error: cannot apply AST actions to LLVM IR file '{{.*}}'
+; CHECK-AST-DUMP-ALL: fatal error: cannot apply AST actions to LLVM IR file '{{.*}}'
+; CHECK-AST-DUMP-ALL-EQ-JSON: fatal error: cannot apply AST actions to LLVM IR file '{{.*}}'
+; CHECK-AST-DUMP-ALL-EQ-DEFAULT: fatal error: cannot apply AST actions to LLVM IR file '{{.*}}'
+; CHECK-AST-PRINT: fatal error: cannot apply AST actions to LLVM IR file '{{.*}}'
+; CHECK-AST-VIEW: fatal error: cannot apply AST actions to LLVM IR file '{{.*}}'
+; CHECK-AST-LIST: fatal error: cannot apply AST actions to LLVM IR file '{{.*}}'
+; CHECK-AST-DUMP-LOOKUP: fatal error: cannot apply AST actions to LLVM IR file '{{.*}}'
+; CHECK-AST-DUMP-FILTER-EQ: fatal error: cannot apply AST actions to LLVM IR file '{{.*}}'
+; CHECK-AST-DUMP-DECL-TYPES: fatal error: cannot apply AST actions to LLVM IR file '{{.*}}'
+; CHECK-SYNTAX-ONLY: fatal error: cannot apply AST actions to LLVM IR file '{{.*}}'