diff options
| author | Radovan Obradovic <robradovic@mips.com> | 2014-05-28 09:43:41 +0000 |
|---|---|---|
| committer | Tom de Vries <vries@gcc.gnu.org> | 2014-05-28 09:43:41 +0000 |
| commit | dbe7d9e3ffd9c5cdb879dd705ed86da5972773ac (patch) | |
| tree | d5af881420733d41b0a68193ad583b1fefbd1855 /gcc/doc | |
| parent | 5c989bbf879aeb9cb772bbc52188ba5b31d77f7f (diff) | |
| download | gcc-dbe7d9e3ffd9c5cdb879dd705ed86da5972773ac.zip gcc-dbe7d9e3ffd9c5cdb879dd705ed86da5972773ac.tar.gz gcc-dbe7d9e3ffd9c5cdb879dd705ed86da5972773ac.tar.bz2 | |
-fuse-caller-save - Add documentation
2014-05-28 Radovan Obradovic <robradovic@mips.com>
Tom de Vries <tom@codesourcery.com>
* doc/invoke.texi (@item Optimization Options): Add -fuse-caller-save to
gccoptlist.
(@item -fuse-caller-save): New item.
Co-Authored-By: Tom de Vries <tom@codesourcery.com>
From-SVN: r211009
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index fcdcb1d..7f13779 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -429,8 +429,8 @@ Objective-C and Objective-C++ Dialects}. -ftree-vectorize -ftree-vrp @gol -funit-at-a-time -funroll-all-loops -funroll-loops @gol -funsafe-loop-optimizations -funsafe-math-optimizations -funswitch-loops @gol --fvariable-expansion-in-unroller -fvect-cost-model -fvpt -fweb @gol --fwhole-program -fwpa -fuse-ld=@var{linker} -fuse-linker-plugin @gol +-fuse-caller-save -fvariable-expansion-in-unroller -fvect-cost-model -fvpt @gol +-fweb -fwhole-program -fwpa -fuse-ld=@var{linker} -fuse-linker-plugin @gol --param @var{name}=@var{value} -O -O0 -O1 -O2 -O3 -Os -Ofast -Og} @@ -7741,6 +7741,14 @@ and then tries to find ways to combine them. Enabled by default at @option{-O1} and higher. +@item -fuse-caller-save +Use caller save registers for allocation if those registers are not used by +any called function. In that case it is not necessary to save and restore +them around calls. This is only possible if called functions are part of +same compilation unit as current function and they are compiled before it. + +Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}. + @item -fconserve-stack @opindex fconserve-stack Attempt to minimize stack usage. The compiler attempts to use less |