diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -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 |