[Driver] Clean up some Separate form options

Drop the `Separate` form of `-fmodule-name X`, `-fprofile-remapping-file X`, and `-frewrite-map-file X`.
To the best of my knowledge they are not used. Their conventional Joined forms (`-fFOO=`) should be used instead.

`-fdebug-compilation-dir X` is used in several places, e.g.  chromium/infra/goma.
It is also advertised in http://blog.llvm.org/2019/11/deterministic-builds-with-clang-and-lld.html
So we keep it but make the EQ form canonical and the Separate form an alias.

Differential Revision: https://reviews.llvm.org/D96886

clang/include/clang/Driver/Options.td

@@ -1096,13 +1096,13 @@ def fauto_profile_accurate : Flag<["-"], "fauto-profile-accurate">,
     Group<f_Group>, Alias<fprofile_sample_accurate>;
 def fno_auto_profile_accurate : Flag<["-"], "fno-auto-profile-accurate">,
     Group<f_Group>, Alias<fno_profile_sample_accurate>;
-def fdebug_compilation_dir : Separate<["-"], "fdebug-compilation-dir">,
-    Group<f_Group>, Flags<[CC1Option, CC1AsOption, CoreOption]>,
-    HelpText<"The compilation directory to embed in the debug info.">,
-    MarshallingInfoString<CodeGenOpts<"DebugCompilationDir">>;
 def fdebug_compilation_dir_EQ : Joined<["-"], "fdebug-compilation-dir=">,
     Group<f_Group>, Flags<[CC1Option, CC1AsOption, CoreOption]>,
-    Alias<fdebug_compilation_dir>;
+    HelpText<"The compilation directory to embed in the debug info">,
+    MarshallingInfoString<CodeGenOpts<"DebugCompilationDir">>;
+def fdebug_compilation_dir : Separate<["-"], "fdebug-compilation-dir">,
+    Group<f_Group>, Flags<[CC1Option, CC1AsOption, CoreOption]>,
+    Alias<fdebug_compilation_dir_EQ>;
 defm debug_info_for_profiling : BoolFOption<"debug-info-for-profiling",
   CodeGenOpts<"DebugInfoForProfiling">, DefaultFalse,
   PosFlag<SetTrue, [CC1Option], "Emit extra debug info to make sample profile more accurate">,
@@ -1122,8 +1122,6 @@ def fprofile_remapping_file_EQ : Joined<["-"], "fprofile-remapping-file=">,
     Group<f_Group>, Flags<[CC1Option, CoreOption]>, MetaVarName<"<file>">,
     HelpText<"Use the remappings described in <file> to match the profile data against names in the program">,
     MarshallingInfoString<CodeGenOpts<"ProfileRemappingFile">>;
-def fprofile_remapping_file : Separate<["-"], "fprofile-remapping-file">,
-    Group<f_Group>, Flags<[CoreOption]>, Alias<fprofile_remapping_file_EQ>;
 defm coverage_mapping : BoolFOption<"coverage-mapping",
   CodeGenOpts<"CoverageMapping">, DefaultFalse,
   PosFlag<SetTrue, [CC1Option], "Generate coverage mapping to enable code coverage analysis">,
@@ -1654,13 +1652,10 @@ defm delete_null_pointer_checks : BoolFOption<"delete-null-pointer-checks",
   PosFlag<SetFalse, [], "Treat usage of null pointers as undefined behavior (default)">,
   BothFlags<[CoreOption]>>;
 
-def frewrite_map_file : Separate<["-"], "frewrite-map-file">,
-                        Group<f_Group>,
-                        Flags<[ NoXarchOption, CC1Option ]>,
-                        MarshallingInfoStringVector<CodeGenOpts<"RewriteMapFiles">>;
 def frewrite_map_file_EQ : Joined<["-"], "frewrite-map-file=">,
                            Group<f_Group>,
-                           Flags<[NoXarchOption]>;
+                           Flags<[NoXarchOption, CC1Option]>,
+                           MarshallingInfoStringVector<CodeGenOpts<"RewriteMapFiles">>;
 
 defm use_line_directives : BoolFOption<"use-line-directives",
   PreprocessorOutputOpts<"UseLineDirectives">, DefaultFalse,
@@ -1984,7 +1979,6 @@ def fmodule_name_EQ : Joined<["-"], "fmodule-name=">, Group<f_Group>,
   Flags<[NoXarchOption,CC1Option]>, MetaVarName<"<name>">,
   HelpText<"Specify the name of the module to build">,
   MarshallingInfoString<LangOpts<"ModuleName">>;
-def fmodule_name : Separate<["-"], "fmodule-name">, Alias<fmodule_name_EQ>;
 def fmodule_implementation_of : Separate<["-"], "fmodule-implementation-of">,
   Flags<[CC1Option]>, Alias<fmodule_name_EQ>;
 def fsystem_module : Flag<["-"], "fsystem-module">, Flags<[CC1Option]>,

clang/lib/Driver/Driver.cpp

@@ -1484,8 +1484,7 @@ void Driver::generateCompilationDiagnostics(
     }
   }
 
-  for (const auto &A : C.getArgs().filtered(options::OPT_frewrite_map_file,
+  for (const auto &A : C.getArgs().filtered(options::OPT_frewrite_map_file_EQ))
-                                            options::OPT_frewrite_map_file_EQ))
     Diag(clang::diag::note_drv_command_failed_diag_msg) << A->getValue();
 
   Diag(clang::diag::note_drv_command_failed_diag_msg)

clang/lib/Driver/ToolChains/Clang.cpp

@@ -617,13 +617,11 @@ getFramePointerKind(const ArgList &Args, const llvm::Triple &Triple) {
 /// Add a CC1 option to specify the debug compilation directory.
 static void addDebugCompDirArg(const ArgList &Args, ArgStringList &CmdArgs,
                                const llvm::vfs::FileSystem &VFS) {
-  if (Arg *A = Args.getLastArg(options::OPT_fdebug_compilation_dir)) {
+  if (Arg *A = Args.getLastArg(options::OPT_fdebug_compilation_dir_EQ)) {
-    CmdArgs.push_back("-fdebug-compilation-dir");
+    A->render(Args, CmdArgs);
-    CmdArgs.push_back(A->getValue());
   } else if (llvm::ErrorOr<std::string> CWD =
                  VFS.getCurrentWorkingDirectory()) {
-    CmdArgs.push_back("-fdebug-compilation-dir");
+    CmdArgs.push_back(Args.MakeArgString("-fdebug-compilation-dir=" + *CWD));
-    CmdArgs.push_back(Args.MakeArgString(*CWD));
   }
 }
 
@@ -4674,20 +4672,15 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
 
   // LLVM Code Generator Options.
 
-  if (Args.hasArg(options::OPT_frewrite_map_file) ||
+  for (const Arg *A : Args.filtered(options::OPT_frewrite_map_file_EQ)) {
-      Args.hasArg(options::OPT_frewrite_map_file_EQ)) {
-    for (const Arg *A : Args.filtered(options::OPT_frewrite_map_file,
-                                      options::OPT_frewrite_map_file_EQ)) {
     StringRef Map = A->getValue();
     if (!llvm::sys::fs::exists(Map)) {
       D.Diag(diag::err_drv_no_such_file) << Map;
     } else {
-        CmdArgs.push_back("-frewrite-map-file");
+      A->render(Args, CmdArgs);
-        CmdArgs.push_back(A->getValue());
       A->claim();
     }
   }
-  }
 
   if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ_vec_extabi,
                                options::OPT_mabi_EQ_vec_default)) {

clang/lib/Driver/ToolChains/CommonArgs.cpp

@@ -1011,7 +1011,7 @@ const char *tools::SplitDebugName(const JobAction &JA, const ArgList &Args,
   } else {
     // Use the compilation dir.
     SmallString<128> T(
-        Args.getLastArgValue(options::OPT_fdebug_compilation_dir));
+        Args.getLastArgValue(options::OPT_fdebug_compilation_dir_EQ));
     SmallString<128> F(llvm::sys::path::stem(Input.getBaseInput()));
     AddPostfix(F);
     T += F;

clang/test/Driver/clang_f_opts.c

@@ -99,7 +99,7 @@
 // RUN: %clang -### -S -fcoverage-mapping %s 2>&1 | FileCheck -check-prefix=CHECK-COVERAGE-AND-GEN %s
 // RUN: %clang -### -S -fcoverage-mapping -fno-coverage-mapping %s 2>&1 | FileCheck -check-prefix=CHECK-DISABLE-COVERAGE %s
 // RUN: %clang -### -S -fprofile-instr-generate -fcoverage-mapping -fno-coverage-mapping %s 2>&1 | FileCheck -check-prefix=CHECK-DISABLE-COVERAGE %s
-// RUN: %clang -### -S -fprofile-remapping-file foo/bar.txt %s 2>&1 | FileCheck -check-prefix=CHECK-PROFILE-REMAP %s
+// RUN: %clang -### -S -fprofile-remapping-file=foo/bar.txt %s 2>&1 | FileCheck -check-prefix=CHECK-PROFILE-REMAP %s
 // RUN: %clang -### -S -forder-file-instrumentation %s 2>&1 | FileCheck -check-prefix=CHECK-ORDERFILE-INSTR %s
 // RUN: %clang -### -flto -forder-file-instrumentation %s 2>&1 | FileCheck -check-prefix=CHECK-ORDERFILE-INSTR-LTO %s
 // CHECK-PROFILE-GENERATE: "-fprofile-instrument=clang"
@@ -504,7 +504,7 @@
 // RUN: %clang -### -S -fdebug-compilation-dir=. %s 2>&1 | FileCheck -check-prefix=CHECK-DEBUG-COMPILATION-DIR %s
 // RUN: %clang -### -fdebug-compilation-dir . -x assembler %s 2>&1 | FileCheck -check-prefix=CHECK-DEBUG-COMPILATION-DIR %s
 // RUN: %clang -### -fdebug-compilation-dir=. -x assembler %s 2>&1 | FileCheck -check-prefix=CHECK-DEBUG-COMPILATION-DIR %s
-// CHECK-DEBUG-COMPILATION-DIR: "-fdebug-compilation-dir" "."
+// CHECK-DEBUG-COMPILATION-DIR: "-fdebug-compilation-dir=."
 
 // RUN: %clang -### -S -fdiscard-value-names %s 2>&1 | FileCheck -check-prefix=CHECK-DISCARD-NAMES %s
 // RUN: %clang -### -S -fno-discard-value-names %s 2>&1 | FileCheck -check-prefix=CHECK-NO-DISCARD-NAMES %s

clang/test/Driver/debug-comp-dir.S

@@ -1,2 +1,3 @@
 // RUN: cd %S && %clang -### -g %s -c 2>&1 | FileCheck -check-prefix=CHECK-PWD %s
-// CHECK-PWD: {{"-fdebug-compilation-dir" ".*Driver.*"}}
+// RUN: cd %S && %clang -x c -### -g %s -c 2>&1 | FileCheck -check-prefix=CHECK-PWD %s
+// CHECK-PWD: "-fdebug-compilation-dir={{.*Driver.*}}"

clang/test/Driver/debug.c

@@ -1,2 +0,0 @@
-// RUN: cd %S && %clang -### -g %s -c 2>&1 | FileCheck -check-prefix=CHECK-PWD %s
-// CHECK-PWD: {{"-fdebug-compilation-dir" ".*Driver.*"}}

clang/test/Driver/rewrite-map-files.c

@@ -1,2 +1,2 @@
-// RUN: %clang -### -frewrite-map-file %t.map -c %s -o /dev/null 2>&1 | FileCheck %s
+// RUN: %clang -### -frewrite-map-file=%t.map -c %s -o /dev/null 2>&1 | FileCheck %s
 // CHECK: error: no such file or directory:

clang/test/Driver/rewrite-map-in-diagnostics.c

@@ -1,7 +1,7 @@
 // RUN: rm -rf "%t"
 // RUN: mkdir -p "%t"
 // RUN: env TMPDIR="%t" TEMP="%t" TMP="%t" RC_DEBUG_OPTION=1 \
-// RUN:     not %clang -fsyntax-only -frewrite-map-file %p/Inputs/rewrite.map %s 2>&1 \
+// RUN:     not %clang -fsyntax-only -frewrite-map-file=%p/Inputs/rewrite.map %s 2>&1 \
 // RUN:   | FileCheck %s
 
 #pragma clang __debug parser_crash

clang/test/Driver/symbol-rewriter.c

@@ -1,21 +1,7 @@
-// RUN: %clang -frewrite-map-file %S/Inputs/rewrite.map -### %s 2>&1 | FileCheck %s -check-prefix CHECK-SINGLE
+// RUN: %clang -frewrite-map-file=%S/Inputs/rewrite.map -### %s 2>&1 | FileCheck %s -check-prefix CHECK-SINGLE
 
-// CHECK-SINGLE: "-frewrite-map-file" "{{.*[\\/]}}rewrite.map"
+// CHECK-SINGLE: "-frewrite-map-file={{.*[\\/]}}rewrite.map"
 
-// RUN: %clang -frewrite-map-file %S/Inputs/rewrite-1.map -frewrite-map-file %S/Inputs/rewrite-2.map -### %s 2>&1 | FileCheck %s -check-prefix CHECK-MULTIPLE
+// RUN: %clang -frewrite-map-file=%S/Inputs/rewrite-1.map -frewrite-map-file=%S/Inputs/rewrite-2.map -### %s 2>&1 | FileCheck %s -check-prefix CHECK-MULTIPLE
-
-// CHECK-MULTIPLE: "-frewrite-map-file" "{{.*[\\/]}}rewrite-1.map" "-frewrite-map-file" "{{.*[\\/]}}rewrite-2.map"
-
-// RUN: %clang -frewrite-map-file=%S/Inputs/rewrite.map -### %s 2>&1 | FileCheck %s -check-prefix CHECK-SINGLE-EQ
-
-// CHECK-SINGLE-EQ: "-frewrite-map-file" "{{.*[\\/]}}rewrite.map"
-
-// RUN: %clang -frewrite-map-file=%S/Inputs/rewrite-1.map -frewrite-map-file=%S/Inputs/rewrite-2.map -### %s 2>&1 | FileCheck %s -check-prefix CHECK-MULTIPLE-EQ
-
-// CHECK-MULTIPLE-EQ: "-frewrite-map-file" "{{.*[\\/]}}rewrite-1.map"
-// CHECK-MULTIPLE-EQ: "-frewrite-map-file" "{{.*[\\/]}}rewrite-2.map"
-
-// RUN: %clang -frewrite-map-file %S/Inputs/rewrite-1.map -frewrite-map-file=%S/Inputs/rewrite-2.map -### %s 2>&1 | FileCheck %s -check-prefix CHECK-MIXED
-
-// CHECK-MIXED: "-frewrite-map-file" "{{.*[\\/]}}rewrite-1.map" "-frewrite-map-file" "{{.*[\\/]}}rewrite-2.map"
 
+// CHECK-MULTIPLE: "-frewrite-map-file={{.*[\\/]}}rewrite-1.map" "-frewrite-map-file={{.*[\\/]}}rewrite-2.map"

clang/test/Driver/working-directory.c

@@ -8,4 +8,4 @@
 
 // CHECK_WORKS: "-coverage-notes-file" "{{[^"]+}}test{{/|\\\\}}Driver{{/|\\\\}}Inputs{{/|\\\\}}pchfile.gcno"
 // CHECK_WORKS: "-working-directory" "{{[^"]+}}test{{/|\\\\}}Driver{{/|\\\\}}Inputs"
-// CHECK_WORKS: "-fdebug-compilation-dir" "{{[^"]+}}test{{/|\\\\}}Driver{{/|\\\\}}Inputs"
+// CHECK_WORKS: "-fdebug-compilation-dir={{[^"]+}}test{{/|\\\\}}Driver{{/|\\\\}}Inputs"