[PATCH] D15829: [PGO] Clang Option that enables IR level PGO instrumentation

[Rong Xu via cfe-commits]

The previous patch was not good as it failed 58 tests that use
-fprofile-instr-generate as a cc1 option.

I can see two methods to solve this:
(1) we change all the 58 tests to use -fprofile-instrument=Clang option.
(2) Fall back to my previous patch: keep -fprofile-instr-generate as
the CC1 options and check it in Frontend/CompilerInvocation.cpp. (i.e.
The redundant else branch Sean was referring to).  We have to do it
here because we cannot assume driver will append
-fprofile-instrument=Clang in the case the user uses
-fprofile-instr-generate as the cc1 option.



On Thu, Jan 28, 2016 at 12:04 PM, Rong Xu <xur at google.com> wrote:
> xur updated this revision to Diff 46303.
> xur added a comment.
>
> Integrated most recently comments/suggestions from David and Sean.
>
> Thanks,
>
> -Rong
>
>
> http://reviews.llvm.org/D15829
>
> Files:
>   include/clang/Basic/DiagnosticDriverKinds.td
>   include/clang/Driver/CC1Options.td
>   include/clang/Driver/Options.td
>   include/clang/Frontend/CodeGenOptions.def
>   include/clang/Frontend/CodeGenOptions.h
>   lib/CodeGen/BackendUtil.cpp
>   lib/CodeGen/CGStmt.cpp
>   lib/CodeGen/CodeGenFunction.cpp
>   lib/CodeGen/CodeGenFunction.h
>   lib/CodeGen/CodeGenModule.cpp
>   lib/CodeGen/CodeGenPGO.cpp
>   lib/Driver/Tools.cpp
>   lib/Frontend/CompilerInvocation.cpp
>   test/CodeGen/Inputs/pgotest.profraw
>   test/CodeGen/pgo-instrumentation.c
>