Hello,
I fixed Options That Control Optimization section according to 'gcc -Q
--help=optimizers' and after consultation with Jakub, I added missing
-foptimize-strlen option.
Ready for trunk?
Martin
ChangeLog:
2014-07-11 Martin Liska mli...@suse.cz
* doc/invoke.texi: Added missing options to options
that control optimization. Missing -foptimize-strlen option
introduced.
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index a83f6c6..8fa63ff 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -6921,25 +6921,31 @@ compilation time.
@option{-O} turns on the following optimization flags:
@gccoptlist{
-fauto-inc-dec @gol
+-fbranch-count-reg @gol
+-fcombine-stack-adjustments @gol
-fcompare-elim @gol
-fcprop-registers @gol
-fdce @gol
-fdefer-pop @gol
-fdelayed-branch @gol
-fdse @gol
+-fforward-propagate @gol
-fguess-branch-probability @gol
-fif-conversion2 @gol
-fif-conversion @gol
+-finline-functions-called-once @gol
-fipa-pure-const @gol
-fipa-profile @gol
-fipa-reference @gol
--fmerge-constants
+-fmerge-constants @gol
+-fmove-loop-invariants @gol
+-fshrink-wrap @gol
-fsplit-wide-types @gol
-ftree-bit-ccp @gol
--ftree-builtin-call-dce @gol
-ftree-ccp @gol
-fssa-phiopt @gol
-ftree-ch @gol
+-ftree-copy-prop @gol
-ftree-copyrename @gol
-ftree-dce @gol
-ftree-dominator-opts @gol
@@ -6947,6 +6953,7 @@ compilation time.
-ftree-forwprop @gol
-ftree-fre @gol
-ftree-phiprop @gol
+-ftree-sink @gol
-ftree-slsr @gol
-ftree-sra @gol
-ftree-pta @gol
@@ -6978,19 +6985,23 @@ also turns on the following optimization flags:
-fhoist-adjacent-loads @gol
-finline-small-functions @gol
-findirect-inlining @gol
+-fipa-cp @gol
-fipa-sra @gol
-fisolate-erroneous-paths-dereference @gol
-foptimize-sibling-calls @gol
+-foptimize-strlen @gol
-fpartial-inlining @gol
-fpeephole2 @gol
--freorder-blocks -freorder-functions @gol
+-freorder-blocks -freorder-blocks-and-partition -freorder-functions @gol
-frerun-cse-after-loop @gol
-fsched-interblock -fsched-spec @gol
-fschedule-insns -fschedule-insns2 @gol
-fstrict-aliasing -fstrict-overflow @gol
+-ftree-builtin-call-dce @gol
-ftree-switch-conversion -ftree-tail-merge @gol
-ftree-pre @gol
--ftree-vrp}
+-ftree-vrp @gol
+-fuse-caller-save}
Please note the warning under @option{-fgcse} about
invoking @option{-O2} on programs that use computed gotos.
@@ -7000,9 +7011,10 @@ 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-loop-vectorize},
-@option{-ftree-slp-vectorize}, @option{-fvect-cost-model},
-@option{-ftree-partial-pre} and @option{-fipa-cp-clone} options.
+@option{-fgcse-after-reload}, @option{-ftree-loop-distribute-patterns},
+@option{-ftree-loop-vectorize}, @option{-ftree-slp-vectorize},
+@option{-fvect-cost-model}, @option{-ftree-partial-pre}
+and @option{-fipa-cp-clone} options.
@item -O0
@opindex O0
@@ -7113,6 +7125,14 @@ Optimize sibling and tail recursive calls.
Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+@item -foptimize-strlen
+@opindex foptimize-strlen
+Optimize various standard C string functions (e.g. @code{strlen},
+@code{strchr} or @code{strcpy}) and
+their _FORTIFY_SOURCE counterparts into faster alternatives.
+
+Enabled at levels @option{-O2}, @option{-O3}.
+
@item -fno-inline
@opindex fno-inline
Do not expand any functions inline apart from those marked with
@@ -7278,6 +7298,8 @@ register, compare it against zero, then branch based upon the result.
This option is only meaningful on architectures that support such
instructions, which include x86, PowerPC, IA-64 and S/390.
+Enabled by default at -O1 and higher.
+
The default is @option{-fbranch-count-reg}.
@item -fno-function-cse
