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This brings rev 1.2 (reality check and document profiling extensions)

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into GCC 2.95.2.
This commit is contained in:
David E. O'Brien 1999-11-01 20:09:07 +00:00
parent 145b487463
commit 7429eb627b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=52769
1 changed files with 7 additions and 7 deletions
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14
contrib/gcc/invoke.texi
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@ -2206,10 +2206,10 @@ perform loop unrolling or function inlining when you specify @samp{-O2}.
As compared to @samp{-O}, this option increases both compilation time
and the performance of the generated code.
@samp{-O2} turns on all optional optimizations except for loop unrolling
and function inlining. It also turns on the @samp{-fforce-mem} option
on all machines and frame pointer elimination on machines where doing so
does not interfere with debugging.
@samp{-O2} turns on all optional optimizations except for loop unrolling,
function inlining, and strict aliasing optimizations. It also turns on the
@samp{-fforce-mem} option on all machines and frame pointer elimination on
machines where doing so does not interfere with debugging.
@item -O3
Optimize yet more. @samp{-O3} turns on all optimizations specified by
@ -2367,9 +2367,9 @@ math functions.
@c --mew 26jan93
The following options control specific optimizations. The @samp{-O2}
option turns on all of these optimizations except @samp{-funroll-loops}
and @samp{-funroll-all-loops}. On most machines, the @samp{-O} option
turns on the @samp{-fthread-jumps} and @samp{-fdelayed-branch} options,
but specific machines may handle it differently.
@samp{-funroll-all-loops}, and @samp{-fstrict-aliasing}. On most machines, the
@samp{-O} option turns on the @samp{-fthread-jumps} and @samp{-fdelayed-branch}
options, but specific machines may handle it differently.
You can use the following flags in the rare cases when ``fine-tuning''
of optimizations to be performed is desired.