diff options
| author | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-01-26 23:00:04 +0000 |
|---|---|---|
| committer | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-01-26 23:00:04 +0000 |
| commit | 5736198392201c503b0bd9f8ee86fb8073f19f45 (patch) | |
| tree | f38e94fefea9081b3c8c56aea7c5e45f007ac4bc /gcc/invoke.texi | |
| parent | aaa36d7cead5de11c84cb2ea57807beaac76062e (diff) | |
| download | gcc-5736198392201c503b0bd9f8ee86fb8073f19f45.tar.gz | |
* flags.h: New flag (optimize_size).
* toplev.c (main): Parse -Os option and set optimize_space
accordingly.
* gcc.c (default_compilers), cp/lang-specs.h, f/lang-specs.h: Define
__OPTIMIZE_SIZE__ when compiling with -Os.
* config/dsp16xx/dsp16xx.h, config/i386/i386.h,
config/i386/dgux.h, config/i960/i960.h, config/pdp11/pdp11.h,
config/v850/v850.h (OPTIMIZATION_OPTIONS): New SIZE argument
to macro.
* config/i386/i386.c (optimization_options): Accept new SIZE argument.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@17497 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/invoke.texi')
| -rw-r--r-- | gcc/invoke.texi | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/gcc/invoke.texi b/gcc/invoke.texi index ef833830261..562eb77e6f1 100644 --- a/gcc/invoke.texi +++ b/gcc/invoke.texi @@ -1,4 +1,4 @@ -@c Copyright (C) 1988,89,92,93,94,95,96,1997 Free Software Foundation, Inc. +@c Copyright (C) 1988,89,92-97,1998 Free Software Foundation, Inc. @c This is part of the GCC manual. @c For copying conditions, see the file gcc.texi. @@ -155,7 +155,7 @@ in the following sections. -fschedule-insns2 -fstrength-reduce -fthread-jumps -funroll-all-loops -funroll-loops -fmove-all-movables -freduce-all-givs --O -O0 -O1 -O2 -O3 +-O -O0 -O1 -O2 -O3 -Os @end smallexample @item Preprocessor Options @@ -2078,6 +2078,11 @@ Optimize yet more. @samp{-O3} turns on all optimizations specified by @item -O0 Do not optimize. +@item -Os +Optimize for size. @samp{-Os} enables all @samp{-O2} optimizations that +do not typically increase code size. It also performs further +optimizations designed to reduce code size. + If you use multiple @samp{-O} options, with or without level numbers, the last such option is the one that is effective. @end table |