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| author | Andrew Pinski <pinskia@physics.uc.edu> | 2003-07-07 06:49:00 +0200 |
|---|---|---|
| committer | Andreas Jaeger <aj@gcc.gnu.org> | 2003-07-07 06:49:00 +0200 |
| commit | 561913cb134ecbf6eb8ec04252e19a43e466b39f (patch) | |
| tree | fb5a649bddc9b91af00168e702c88b00b3d014ce /gcc | |
| parent | 5beadb33d9d7f527d1797141ffccb05d9f58aaf5 (diff) | |
| download | gcc-561913cb134ecbf6eb8ec04252e19a43e466b39f.zip gcc-561913cb134ecbf6eb8ec04252e19a43e466b39f.tar.gz gcc-561913cb134ecbf6eb8ec04252e19a43e466b39f.tar.bz2 | |
invoke.texi (-falign-functions): Document that when n is zero then a machine-dependent default is used.
2003-07-07 Andrew Pinski <pinskia@physics.uc.edu>
* doc/invoke.texi (-falign-functions): Document that
when n is zero then a machine-dependent default is used.
(-falign-labels): Document that when n is zero then a
machine-dependent default is used and that -falign-labels =1
is equivalent to -fno-align-labels.
(-falign-loops): Likewise.
(-falign-jumps): Likewise.
From-SVN: r69030
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/doc/invoke.texi | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 9518e0f..275c213 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -4129,7 +4129,7 @@ equivalent and mean that functions will not be aligned. Some assemblers only support this flag when @var{n} is a power of two; in that case, it is rounded up. -If @var{n} is not specified, use a machine-dependent default. +If @var{n} is not specified or is zero, use a machine-dependent default. Enabled at levels @option{-O2}, @option{-O3}. @@ -4141,11 +4141,14 @@ Align all branch targets to a power-of-two boundary, skipping up to make code slower, because it must insert dummy operations for when the branch target is reached in the usual flow of the code. +@option{-fno-align-labels} and @option{-falign-labels=1} are +equivalent and mean that labels will not be aligned. + If @option{-falign-loops} or @option{-falign-jumps} are applicable and are greater than this value, then their values are used instead. -If @var{n} is not specified, use a machine-dependent default which is -very likely to be @samp{1}, meaning no alignment. +If @var{n} is not specified or is zero, use a machine-dependent default +which is very likely to be @samp{1}, meaning no alignment. Enabled at levels @option{-O2}, @option{-O3}. @@ -4157,7 +4160,10 @@ like @option{-falign-functions}. The hope is that the loop will be executed many times, which will make up for any execution of the dummy operations. -If @var{n} is not specified, use a machine-dependent default. +@option{-fno-align-loops} and @option{-falign-loops=1} are +equivalent and mean that loops will not be aligned. + +If @var{n} is not specified or is zero, use a machine-dependent default. Enabled at levels @option{-O2}, @option{-O3}. @@ -4169,7 +4175,10 @@ where the targets can only be reached by jumping, skipping up to @var{n} bytes like @option{-falign-functions}. In this case, no dummy operations need be executed. -If @var{n} is not specified, use a machine-dependent default. +@option{-fno-align-jumps} and @option{-falign-jumps=1} are +equivalent and mean that loops will not be aligned. + +If @var{n} is not specified or is zero, use a machine-dependent default. Enabled at levels @option{-O2}, @option{-O3}. |