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| author | vmakarov <vmakarov@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-10-22 01:44:39 +0000 |
|---|---|---|
| committer | vmakarov <vmakarov@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-10-22 01:44:39 +0000 |
| commit | f58620b7d8f8dc52f9f8e072a49f99df444d43ec (patch) | |
| tree | a8f72381ffa5fe5e541724f227760f360d1ef388 /gcc/doc | |
| parent | 0e1d2b8ed65b6783fe53cf4c739940af94bf0850 (diff) | |
| download | gcc-f58620b7d8f8dc52f9f8e072a49f99df444d43ec.tar.gz | |
2009-10-21 Vladimir Makarov <vmakarov@redhat.com>
* doc/invoke.texi (fira-loop-pressure): Update default value.
* opts.c (decode_options): Remove default value setting for
flag_ira_loop_pressure.
* config/ia64/ia64.c (ia64_override_options): Set
flag_ira_loop_pressure up for -O3.
* config/rs6000/rs6000.c (rs6000_override_options): Ditto.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@153445 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 0a7d9790476..7b20ced5483 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -5733,8 +5733,7 @@ invoking @option{-O2} on programs that use computed gotos. Optimize yet more. @option{-O3} turns on all optimizations specified by @option{-O2} and also turns on the @option{-finline-functions}, @option{-funswitch-loops}, @option{-fpredictive-commoning}, -@option{-fgcse-after-reload}, @option{-ftree-vectorize} and -@option{-fira-loop-pressure} options. +@option{-fgcse-after-reload} and @option{-ftree-vectorize} options. @item -O0 @opindex O0 @@ -6235,9 +6234,10 @@ architectures with big regular register files. @opindex fira-loop-pressure Use IRA to evaluate register pressure in loops for decision to move loop invariants. Usage of this option usually results in generation -of faster and smaller code but can slow compiler down. +of faster and smaller code on machines with big register files (>= 32 +registers) but it can slow compiler down. -This option is enabled at level @option{-O3}. +This option is enabled at level @option{-O3} for some targets. @item -fno-ira-share-save-slots @opindex fno-ira-share-save-slots |