Support -fno-delayed-template-parsing in clang-cl.exe

[rnk]

Summary

This change adds support for the -fno-delayed-template-parsing option in clang-cl.exe. This allows developers using clang-cl.exe to opt out of emulation of MSVC's non-conformant template instantiation implementation while continuing to use clang-cl.exe for its emulation of cl.exe command-line options. The default behavior of clang-cl.exe (-fdelayed-template-parsing) is unchanged.

The MSVC Standard Library implementation uses clang-cl.exe with this switch in its tests to ensure that the library headers work on compilers with the conformant two-phase-lookup behavior.

[rnk]

Looks good, let me grab this and add a test. I think this just got lost in the shuffle over the summer.

cfe/trunk/include/clang/Driver/Options.td

def fms_compatibility_version
     : Joined<["-"], "fms-compatibility-version=">,
       Group<f_Group>,
       Flags<[ CC1Option, CoreOption ]>,
       HelpText<"Dot-separated value representing the Microsoft compiler "
                "version number to report in _MSC_VER (0 = don't define it "
                "(default))">;
 def fdelayed_template_parsing : Flag<["-"], "fdelayed-template-parsing">, Group<f_Group>,
   HelpText<"Parse templated function definitions at the end of the "
-           "translation unit">,  Flags<[CC1Option]>;
+           "translation unit">,  Flags<[CC1Option, CoreOption]>;
 def fms_memptr_rep_EQ : Joined<["-"], "fms-memptr-rep=">, Group<f_Group>, Flags<[CC1Option]>;
 def fmodules_cache_path : Joined<["-"], "fmodules-cache-path=">, Group<i_Group>,
   Flags<[DriverOption, CC1Option]>, MetaVarName<"<directory>">,
   HelpText<"Specify the module cache path">;
 def fmodules_user_build_path : Separate<["-"], "fmodules-user-build-path">, Group<i_Group>,
   Flags<[DriverOption, CC1Option]>, MetaVarName<"<directory>">,
   HelpText<"Specify the module user build path">;
 def fprebuilt_module_path : Joined<["-"], "fprebuilt-module-path=">, Group<i_Group>,

 def fmodule_file_deps : Flag <["-"], "fmodule-file-deps">, Group<f_Group>,
   Flags<[DriverOption]>;
 def fno_module_file_deps : Flag <["-"], "fno-module-file-deps">, Group<f_Group>,
   Flags<[DriverOption]>;
 def fno_ms_extensions : Flag<["-"], "fno-ms-extensions">, Group<f_Group>,
   Flags<[CoreOption]>;
 def fno_ms_compatibility : Flag<["-"], "fno-ms-compatibility">, Group<f_Group>,
   Flags<[CoreOption]>;
-def fno_delayed_template_parsing : Flag<["-"], "fno-delayed-template-parsing">, Group<f_Group>;
+def fno_delayed_template_parsing : Flag<["-"], "fno-delayed-template-parsing">, Group<f_Group>,
+  Flags<[DriverOption, CoreOption]>;
 def fno_objc_exceptions: Flag<["-"], "fno-objc-exceptions">, Group<f_Group>;
 def fno_objc_legacy_dispatch : Flag<["-"], "fno-objc-legacy-dispatch">, Group<f_Group>;
 def fno_objc_weak : Flag<["-"], "fno-objc-weak">, Group<f_Group>, Flags<[CC1Option]>;
 def fno_omit_frame_pointer : Flag<["-"], "fno-omit-frame-pointer">, Group<f_Group>;
 def fno_operator_names : Flag<["-"], "fno-operator-names">, Group<f_Group>,
   HelpText<"Do not treat C++ operator name keywords as synonyms for operators">,
   Flags<[CC1Option]>;
 def fno_pascal_strings : Flag<["-"], "fno-pascal-strings">, Group<f_Group>;

cfe/trunk/test/Driver/cl-options.c

 // We recognize -f[no-]strict-aliasing.
 // RUN: %clang_cl -c -### -- %s 2>&1 | FileCheck -check-prefix=DEFAULTSTRICT %s
 // DEFAULTSTRICT: "-relaxed-aliasing"
 // RUN: %clang_cl -c -fstrict-aliasing -### -- %s 2>&1 | FileCheck -check-prefix=STRICT %s
 // STRICT-NOT: "-relaxed-aliasing"
 // RUN: %clang_cl -c -fno-strict-aliasing -### -- %s 2>&1 | FileCheck -check-prefix=NOSTRICT %s
 // NOSTRICT: "-relaxed-aliasing"
 
+// We recognize -f[no-]delayed-template-parsing.
+// RUN: %clang_cl -c -### -- %s 2>&1 | FileCheck -check-prefix=DELAYEDDEFAULT %s
+// DELAYEDDEFAULT: "-fdelayed-template-parsing"
+// RUN: %clang_cl -c -fdelayed-template-parsing -### -- %s 2>&1 | FileCheck -check-prefix=DELAYEDON %s
+// DELAYEDON: "-fdelayed-template-parsing"
+// RUN: %clang_cl -c -fno-delayed-template-parsing -### -- %s 2>&1 | FileCheck -check-prefix=DELAYEDOFF %s
+// DELAYEDOFF-NOT: "-fdelayed-template-parsing"
+
 // For some warning ids, we can map from MSVC warning to Clang warning.
 // RUN: %clang_cl -wd4005 -wd4100 -wd4910 -wd4996 -### -- %s 2>&1 | FileCheck -check-prefix=Wno %s
 // Wno: "-cc1"
 // Wno: "-Wno-macro-redefined"
 // Wno: "-Wno-unused-parameter"
 // Wno: "-Wno-dllexport-explicit-instantiation-decl"
 // Wno: "-Wno-deprecated-declarations"