diff options
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 37 |
1 files changed, 5 insertions, 32 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 91a32641d37..398d2fc8ed2 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -281,7 +281,7 @@ Objective-C and Objective-C++ Dialects}. -ftree-vectorizer-verbose=@var{n} @gol -fdump-tree-storeccp@r{[}-@var{n}@r{]} @gol -feliminate-dwarf2-dups -feliminate-unused-debug-types @gol --feliminate-unused-debug-symbols -fmem-report -fprofile-arcs -ftree-based-profiling @gol +-feliminate-unused-debug-symbols -fmem-report -fprofile-arcs @gol -frandom-seed=@var{string} -fsched-verbose=@var{n} @gol -ftest-coverage -ftime-report -fvar-tracking @gol -g -g@var{level} -gcoff -gdwarf-2 @gol @@ -325,7 +325,7 @@ Objective-C and Objective-C++ Dialects}. -fsched-stalled-insns=@var{n} -sched-stalled-insns-dep=@var{n} @gol -fsched2-use-superblocks @gol -fsched2-use-traces -freschedule-modulo-scheduled-loops @gol --fsignaling-nans -fsingle-precision-constant -fspeculative-prefetching @gol +-fsignaling-nans -fsingle-precision-constant @gol -fstrength-reduce -fstrict-aliasing -ftracer -fthread-jumps @gol -funroll-all-loops -funroll-loops -fpeel-loops @gol -fsplit-ivs-in-unroller -funswitch-loops @gol @@ -3580,17 +3580,6 @@ executed. When an arc is the only exit or only entrance to a block, the instrumentation code can be added to the block; otherwise, a new basic block must be created to hold the instrumentation code. -@item -ftree-based-profiling -@opindex ftree-based-profiling -This option is used in addition to @option{-fprofile-arcs} or -@option{-fbranch-probabilities} to control whether those optimizations -are performed on a tree-based or rtl-based internal representation. -If you use this option when compiling with @option{-fprofile-arcs}, -you must also use it when compiling later with @option{-fbranch-probabilities}. -Currently the tree-based optimization is in an early stage of -development, and this option is recommended only for those people -working on improving it. - @need 2000 @item -ftest-coverage @opindex ftest-coverage @@ -5329,8 +5318,9 @@ The following options are enabled: @code{-fprofile-arcs}, @code{-fprofile-values Enable profile feedback directed optimizations, and optimizations generally profitable only with profile feedback available. -The following options are enabled: @code{-fbranch-probabilities}, -@code{-fvpt}, @code{-funroll-loops}, @code{-fpeel-loops}, @code{-ftracer}. +The following options are enabled: @code{-fbranch-probabilities}, @code{-fvpt}, +@code{-funroll-loops}, @code{-fpeel-loops}, @code{-ftracer}, +@code{-fno-loop-optimize}. @end table @@ -5527,23 +5517,6 @@ and actually performs the optimizations based on them. Currently the optimizations include specialization of division operation using the knowledge about the value of the denominator. -@item -fspeculative-prefetching -@opindex fspeculative-prefetching -If combined with @option{-fprofile-arcs}, it instructs the compiler to add -a code to gather information about addresses of memory references in the -program. - -With @option{-fbranch-probabilities}, it reads back the data gathered -and issues prefetch instructions according to them. In addition to the opportunities -noticed by @option{-fprefetch-loop-arrays}, it also notices more complicated -memory access patterns---for example accesses to the data stored in linked -list whose elements are usually allocated sequentially. - -In order to prevent issuing double prefetches, usage of -@option{-fspeculative-prefetching} implies @option{-fno-prefetch-loop-arrays}. - -Enabled with @option{-fprofile-generate} and @option{-fprofile-use}. - @item -frename-registers @opindex frename-registers Attempt to avoid false dependencies in scheduled code by making use |