[PATCH] D121997: [clang][driver] Fix compilation database dump with multiple architectures

[Jan Svoboda via Phabricator via cfe-commits]

jansvoboda11 updated this revision to Diff 416846.
jansvoboda11 added a comment.

Introduce `-driver-only` to avoid running `-cc1`s.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D121997/new/

https://reviews.llvm.org/D121997

Files:
  clang/include/clang/Driver/Options.td
  clang/lib/Driver/Driver.cpp
  clang/lib/Driver/ToolChains/Clang.cpp
  clang/lib/Frontend/CreateInvocationFromCommandLine.cpp
  clang/test/Driver/compilation_database_multiarch.c


Index: clang/test/Driver/compilation_database_multiarch.c
===================================================================
--- /dev/null
+++ clang/test/Driver/compilation_database_multiarch.c
@@ -0,0 +1,6 @@
+// RUN: rm -rf %t && mkdir -p %t
+// RUN: %clang -driver-only -o %/out %s -mtargetos=macos12 -arch arm64 -arch x86_64 -MJ %t/compilation_database.json
+// RUN: FileCheck --input-file=%t/compilation_database.json %s
+
+// CHECK:      { "directory": "{{.*}}", "file": "{{.*}}", "output": "{{.*}}", "arguments": [{{.*}} "--target=x86_64-apple-macosx12.0.0"]},
+// CHECK-NEXT: { "directory": "{{.*}}", "file": "{{.*}}", "output": "{{.*}}", "arguments": [{{.*}} "--target=arm64-apple-macosx12.0.0"]},
Index: clang/lib/Frontend/CreateInvocationFromCommandLine.cpp
===================================================================
--- clang/lib/Frontend/CreateInvocationFromCommandLine.cpp
+++ clang/lib/Frontend/CreateInvocationFromCommandLine.cpp
@@ -56,6 +56,9 @@
   if (!C)
     return nullptr;
 
+  if (C->getArgs().hasArg(driver::options::OPT_driver_only))
+    return nullptr;
+
   // Just print the cc1 options if -### was present.
   if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) {
     C->getJobs().Print(llvm::errs(), "\n", true);
Index: clang/lib/Driver/ToolChains/Clang.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Clang.cpp
+++ clang/lib/Driver/ToolChains/Clang.cpp
@@ -2382,7 +2382,8 @@
   if (!CompilationDatabase) {
     std::error_code EC;
     auto File = std::make_unique<llvm::raw_fd_ostream>(
-        Filename, EC, llvm::sys::fs::OF_TextWithCRLF);
+        Filename, EC,
+        llvm::sys::fs::OF_TextWithCRLF | llvm::sys::fs::OF_Append);
     if (EC) {
       D.Diag(clang::diag::err_drv_compilationdatabase) << Filename
                                                        << EC.message();
Index: clang/lib/Driver/Driver.cpp
===================================================================
--- clang/lib/Driver/Driver.cpp
+++ clang/lib/Driver/Driver.cpp
@@ -1597,6 +1597,9 @@
 int Driver::ExecuteCompilation(
     Compilation &C,
     SmallVectorImpl<std::pair<int, const Command *>> &FailingCommands) {
+  if (C.getArgs().hasArg(options::OPT_driver_only))
+    return 0;
+
   // Just print if -### was present.
   if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
     C.getJobs().Print(llvm::errs(), "\n", true);
@@ -1843,6 +1846,7 @@
   }
 
   if (C.getArgs().hasArg(options::OPT_v) ||
+      C.getArgs().hasArg(options::OPT_driver_only) ||
       C.getArgs().hasArg(options::OPT__HASH_HASH_HASH) ||
       C.getArgs().hasArg(options::OPT_print_supported_cpus)) {
     PrintVersion(C, llvm::errs());
@@ -4425,6 +4429,8 @@
       C.getArgs().hasArg(options::OPT_Qunused_arguments))
     return;
 
+  // Claim -driver-only here.
+  (void)C.getArgs().hasArg(options::OPT_driver_only);
   // Claim -### here.
   (void)C.getArgs().hasArg(options::OPT__HASH_HASH_HASH);
 
Index: clang/include/clang/Driver/Options.td
===================================================================
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -2688,6 +2688,7 @@
             " overwriting polymorphic C++ objects">,
   NegFlag<SetFalse>>;
 def fstrict_overflow : Flag<["-"], "fstrict-overflow">, Group<f_Group>;
+def driver_only : Flag<["-"], "driver-only">, Flags<[NoXarchOption, CoreOption]>, HelpText<"Only run the driver.">;
 def fsyntax_only : Flag<["-"], "fsyntax-only">,
   Flags<[NoXarchOption,CoreOption,CC1Option,FC1Option]>, Group<Action_Group>;
 def ftabstop_EQ : Joined<["-"], "ftabstop=">, Group<f_Group>;


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