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| author | Xinliang David Li <davidxl@google.com> | 2013-08-10 03:48:01 +0000 |
|---|---|---|
| committer | Xinliang David Li <davidxl@gcc.gnu.org> | 2013-08-10 03:48:01 +0000 |
| commit | ad83025ea6eda7c673e368f44d86164fba30c1a6 (patch) | |
| tree | b6fc4e33d02396162f83c0a7295536e37068bd98 /gcc/doc | |
| parent | 7d1d05602c1c36e8eab381f649dd699191e82197 (diff) | |
| download | gcc-ad83025ea6eda7c673e368f44d86164fba30c1a6.zip gcc-ad83025ea6eda7c673e368f44d86164fba30c1a6.tar.gz gcc-ad83025ea6eda7c673e368f44d86164fba30c1a6.tar.bz2 | |
Implement -mmemcpy-strategy= and -mmemset-strategy= options
From-SVN: r201645
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 14955dd..70f09e7 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -652,6 +652,7 @@ Objective-C and Objective-C++ Dialects}. -mbmi2 -mrtm -mlwp -mthreads @gol -mno-align-stringops -minline-all-stringops @gol -minline-stringops-dynamically -mstringop-strategy=@var{alg} @gol +-mmemcpy-strategy=@var{strategy} -mmemset-strategy=@var{strategy} -mpush-args -maccumulate-outgoing-args -m128bit-long-double @gol -m96bit-long-double -mlong-double-64 -mlong-double-80 @gol -mregparm=@var{num} -msseregparm @gol @@ -14651,6 +14652,24 @@ Expand into an inline loop. Always use a library call. @end table +@item -mmemcpy-strategy=@var{strategy} +@opindex mmemcpy-strategy=@var{strategy} +Override the internal decision heuristic to decide if @code{__builtin_memcpy} +should be inlined and what inline algorithm to use when the expected size +of the copy operation is known. @var{strategy} +is a comma-separated list of @var{alg}:@var{max_size}:@var{dest_align} triplets. +@var{alg} is specified in @option{-mstringop-strategy}, @var{max_size} specifies +the max byte size with which inline algorithm @var{alg} is allowed. For the last +triplet, the @var{max_size} must be @code{-1}. The @var{max_size} of the triplets +in the list must be specified in increasing order. The minimal byte size for +@var{alg} is @code{0} for the first triplet and @code{@var{max_size} + 1} of the +preceding range. + +@item -mmemset-strategy=@var{strategy} +@opindex mmemset-strategy=@var{strategy} +The option is similar to @option{-mmemcpy-strategy=} except that it is to control +@code{__builtin_memset} expansion. + @item -momit-leaf-frame-pointer @opindex momit-leaf-frame-pointer Don't keep the frame pointer in a register for leaf functions. This |