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Re: [gimplefe] Regarding command line option handling


On Wed, May 4, 2016 at 8:41 AM, Prasad Ghangal <prasad.ghangal@gmail.com> wrote:
> Hi !
> Currently I am trying to introduce new command line option -fgimple,
> for that I am adding this to c.opt
>
> diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt
> index 4f86876..88e55c6 100644
> --- a/gcc/c-family/c.opt
> +++ b/gcc/c-family/c.opt
> @@ -66,6 +66,10 @@ C ObjC C++ ObjC++ Separate Alias(d)
>  -dump=
>  C ObjC C++ ObjC++ Joined Alias(d)
>
> +fgimple
> +C Var(flag_gimple) Init(0)
> +Enable parsing GIMPLE
> +
>  -imacros
>  C ObjC C++ ObjC++ Separate Alias(imacros) MissingArgError(missing
> filename after %qs)
>
>
> But I am getting error as - "gcc: error: unrecognized command line
> option â-fgimple â; did you mean â-fgimple â?"
>
> I am unable to find where to handle it.

Did you properly re-build gcc after that change?  It should work just fine.

Richard.

>
>
> Till now I am able to JUST parse __GIMPLE keyword
>
> diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c
> index cae2faf..1ccb4d6 100644
> --- a/gcc/c-family/c-common.c
> +++ b/gcc/c-family/c-common.c
> @@ -468,6 +468,7 @@ const struct c_common_resword c_common_reswords[] =
>    { "__extension__",    RID_EXTENSION,    0 },
>    { "__func__",        RID_C99_FUNCTION_NAME, 0 },
>    { "__has_nothrow_assign", RID_HAS_NOTHROW_ASSIGN, D_CXXONLY },
> +  { "__GIMPLE",        RID_GIMPLE,    0 },
>    { "__has_nothrow_constructor", RID_HAS_NOTHROW_CONSTRUCTOR, D_CXXONLY },
>    { "__has_nothrow_copy", RID_HAS_NOTHROW_COPY, D_CXXONLY },
>    { "__has_trivial_assign", RID_HAS_TRIVIAL_ASSIGN, D_CXXONLY },
> @@ -12393,6 +12394,7 @@ keyword_is_function_specifier (enum rid keyword)
>      case RID_NORETURN:
>      case RID_VIRTUAL:
>      case RID_EXPLICIT:
> +    case RID_GIMPLE:
>        return true;
>      default:
>        return false;
> diff --git a/gcc/c-family/c-common.h b/gcc/c-family/c-common.h
> index 663e457..a91665f 100644
> --- a/gcc/c-family/c-common.h
> +++ b/gcc/c-family/c-common.h
> @@ -64,10 +64,10 @@ enum rid
>    /* Modifiers: */
>    /* C, in empirical order of frequency.  */
>    RID_STATIC = 0,
> -  RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
> -  RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
> -  RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
> -  RID_NORETURN, RID_ATOMIC,
> +  RID_UNSIGNED, RID_LONG,     RID_CONST,   RID_EXTERN,
> +  RID_GIMPLE,    RID_REGISTER, RID_TYPEDEF, RID_SHORT,
> +  RID_INLINE,    RID_VOLATILE, RID_SIGNED,  RID_AUTO,
> +  RID_RESTRICT, RID_NORETURN, RID_ATOMIC,
>
>    /* C extensions */
>    RID_COMPLEX, RID_THREAD, RID_SAT,
> diff --git a/gcc/c/c-decl.c b/gcc/c/c-decl.c
> index f0c677b..e690ca3 100644
> --- a/gcc/c/c-decl.c
> +++ b/gcc/c/c-decl.c
> @@ -10401,6 +10401,8 @@ declspecs_add_scspec (source_location loc,
>      case RID_TYPEDEF:
>        n = csc_typedef;
>        break;
> +    case RID_GIMPLE:
> +      break;
>      default:
>        gcc_unreachable ();
>      }
> diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
> index bdd669d..266b672 100644
> --- a/gcc/c/c-parser.c
> +++ b/gcc/c/c-parser.c
> @@ -732,6 +732,7 @@ c_token_starts_declspecs (c_token *token)
>      case RID_ALIGNAS:
>      case RID_ATOMIC:
>      case RID_AUTO_TYPE:
> +    case RID_GIMPLE:
>        return true;
>      default:
>        if (token->keyword >= RID_FIRST_INT_N
> @@ -2461,6 +2462,7 @@ c_parser_declspecs (c_parser *parser, struct
> c_declspecs *specs,
>      case RID_NORETURN:
>      case RID_AUTO:
>      case RID_THREAD:
> +    case RID_GIMPLE:
>        if (!scspec_ok)
>          goto out;
>        attrs_ok = true;
> @@ -3960,6 +3962,7 @@ c_parser_attribute_any_word (c_parser *parser)
>      case RID_INT_N_1:
>      case RID_INT_N_2:
>      case RID_INT_N_3:
> +    case RID_GIMPLE:
>        ok = true;
>        break;
>      default:
>
>
>
> After recognizing __GIMPLE, I am planning to call gimple_fn_parser
> function which will parse gimple body.
> For pass manager, basic idea is to introduce new member to struct
> function as pass_list and modify function execute_pass_list to run
> only passes in pass list.
>
>
>
> Thanks,
> Prasad Ghangal


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