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-fuse-caller-save - Add documentation

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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
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Radovan Obradovic 2014-05-28 09:43:41 +00:00 committed by Tom de Vries
parent 5c989bbf87
commit dbe7d9e3ff
2 changed files with 17 additions and 2 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
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.
2014-05-28 Radovan Obradovic <robradovic@mips.com>
Tom de Vries <tom@codesourcery.com>

12
gcc/doc/invoke.texi
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@ -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