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invoke.texi (-Ofast): Also enables -fstack-arrays.

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2011-05-14  Tobias Burnus  <burnus@net-b.de>

        * doc/invoke.texi (-Ofast): Also enables -fstack-arrays.

2011-05-14  Tobias Burnus  <burnus@net-b.de>

        * options.c (gfc_init_options, gfc_post_options): Enable
        -fstack-arrays by default if -Ofast is used.
        * invoke.texi (-fstack-arrays): Document this.

From-SVN: r173751
This commit is contained in:
Tobias Burnus 2011-05-14 11:39:38 +02:00
parent de8bd1420e
commit 2d8c9ad5c9
5 changed files with 32 additions and 17 deletions

4
gcc/ChangeLog

@ -1,3 +1,7 @@
2011-05-14 Tobias Burnus <burnus@net-b.de>
* doc/invoke.texi (-Ofast): Also enables -fstack-arrays.
2011-05-13 Martin Jambor <mjambor@suse.cz>
* ipa-prop.c (ipa_cst_from_jfunc): New function.

2
gcc/doc/invoke.texi

@ -6000,7 +6000,7 @@ Disregard strict standards compliance. @option{-Ofast} enables all
@option{-O3} optimizations. It also enables optimizations that are not
valid for all standard compliant programs.
It turns on @option{-ffast-math} and the Fortran-specific
@option{-fno-protect-parens}.
@option{-fno-protect-parens} and @option{-fstack-arrays}.
If you use multiple @option{-O} options, with or without level numbers,
the last such option is the one that is effective.

34
gcc/fortran/ChangeLog

@ -1,21 +1,27 @@
2011-05-14 Janne Blomqvist <jb@gcc.gnu.org>
2011-05-14 Tobias Burnus <burnus@net-b.de>
PR libfortran/48915
* gfortran.h (gfc_option_t): Remove flag_dump_core.
* gfortran.texi (GFORTRAN_ERROR_DUMPCORE): Remove section.
(GFORTRAN_ERROR_BACKTRACE): Document that it's enabled by default.
* intrinsic.texi (ABORT): Remove explanation of -fdump-core.
* invoke.texi: Remove -fdump-core, document that -fbacktrace is
enabled by default.
* lang.opt: Remove -fdump-core.
* options.c (gfc_init_options): Make backtrace default to enabled,
remove dump_core.
(gfc_handle_option): Remove OPT_fdump-core.
* trans-decl.c: Pass a 0 to preserve ABI.
* options.c (gfc_init_options, gfc_post_options): Enable
-fstack-arrays by default if -Ofast is used.
* invoke.texi (-fstack-arrays): Document this.
2011-05-14 Janne Blomqvist <jb@gcc.gnu.org>
* gfortran.texi: Remove GFORTRAN_USE_STDERR documentation.
PR libfortran/48915
* gfortran.h (gfc_option_t): Remove flag_dump_core.
* gfortran.texi (GFORTRAN_ERROR_DUMPCORE): Remove section.
(GFORTRAN_ERROR_BACKTRACE): Document that it's enabled by default.
* intrinsic.texi (ABORT): Remove explanation of -fdump-core.
* invoke.texi: Remove -fdump-core, document that -fbacktrace is
enabled by default.
* lang.opt: Remove -fdump-core.
* options.c (gfc_init_options): Make backtrace default to enabled,
remove dump_core.
(gfc_handle_option): Remove OPT_fdump-core.
* trans-decl.c: Pass a 0 to preserve ABI.
2011-05-14 Janne Blomqvist <jb@gcc.gnu.org>
* gfortran.texi: Remove GFORTRAN_USE_STDERR documentation.
2011-05-13 Tobias Burnus <burnus@net-b.de>

4
gcc/fortran/invoke.texi

@ -1381,7 +1381,9 @@ The default value for @var{n} is 32768.
Adding this option will make the fortran compiler put all local arrays,
even those of unknown size onto stack memory. If your program uses very
large local arrays it's possible that you'll have to extend your runtime
limits for stack memory on some operating systems.
limits for stack memory on some operating systems. This flag is enabled
by default at optimization level @option{-Ofast}.
@item -fpack-derived
@opindex @code{fpack-derived}

5
gcc/fortran/options.c

@ -125,7 +125,7 @@ gfc_init_options (unsigned int decoded_options_count,
/* Default value of flag_max_stack_var_size is set in gfc_post_options. */
gfc_option.flag_max_stack_var_size = -2;
gfc_option.flag_stack_arrays = 0;
gfc_option.flag_stack_arrays = -1;
gfc_option.flag_range_check = 1;
gfc_option.flag_pack_derived = 0;
@ -274,6 +274,9 @@ gfc_post_options (const char **pfilename)
if (gfc_option.flag_protect_parens == -1)
gfc_option.flag_protect_parens = !optimize_fast;
if (gfc_option.flag_stack_arrays == -1)
gfc_option.flag_stack_arrays = optimize_fast;
/* By default, disable (re)allocation during assignment for -std=f95,
and enable it for F2003/F2008/GNU/Legacy. */
if (gfc_option.flag_realloc_lhs == -1)