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re PR middle-end/59658 (Document -f* flags enabled by -Og)
2018-11-14 Sandra Loosemore <sandra@codesourcery.com> PR middle-end/59658 gcc/ * doc/invoke.texi (Optimize Options): Clarify that -O0 and -Og also suppress many optimizations. Alphabetize option lists for -O1, -O2, and -Os. Add list of options disabled with -Og, and correct documentation for those options to say that. * opts.c (default_options_table): Sort table by level and option name, to make it easier to correlate to the manual. From-SVN: r266162
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Sandra Loosemore
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@ -1,3 +1,13 @@
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2018-11-14 Sandra Loosemore <sandra@codesourcery.com>
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PR middle-end/59658
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* doc/invoke.texi (Optimize Options): Clarify that -O0 and -Og
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also suppress many optimizations. Alphabetize option lists for
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-O1, -O2, and -Os. Add list of options disabled with -Og, and
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correct documentation for those options to say that.
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* opts.c (default_options_table): Sort table by level and option
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name, to make it easier to correlate to the manual.
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2018-11-14 Uros Bizjak <ubizjak@gmail.com>
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* config/i386/i386.c (ix86_print_operand_address_as): Simplify
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@ -7897,9 +7897,10 @@ each of them.
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Not all optimizations are controlled directly by a flag. Only
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optimizations that have a flag are listed in this section.
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Most optimizations are only enabled if an @option{-O} level is set on
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the command line. Otherwise they are disabled, even if individual
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optimization flags are specified.
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Most optimizations are completely disabled at @option{-O0} or if an
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@option{-O} level is not set on the command line, even if individual
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optimization flags are specified. Similarly, @option{-Og} suppresses
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many optimization passes.
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Depending on the target and how GCC was configured, a slightly different
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set of optimizations may be enabled at each @option{-O} level than
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@ -7919,9 +7920,14 @@ With @option{-O}, the compiler tries to reduce code size and execution
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time, without performing any optimizations that take a great deal of
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compilation time.
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@c Note that in addition to the default_options_table list in opts.c,
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@c several optimization flags default to true but control optimization
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@c passes that are explicitly disabled at -O0.
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@option{-O} turns on the following optimization flags:
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@gccoptlist{
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-fauto-inc-dec @gol
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@c Please keep the following list alphabetized.
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@gccoptlist{-fauto-inc-dec @gol
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-fbranch-count-reg @gol
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-fcombine-stack-adjustments @gol
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-fcompare-elim @gol
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@ -7932,11 +7938,11 @@ compilation time.
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-fdse @gol
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-fforward-propagate @gol
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-fguess-branch-probability @gol
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-fif-conversion2 @gol
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-fif-conversion @gol
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-fif-conversion2 @gol
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-finline-functions-called-once @gol
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-fipa-pure-const @gol
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-fipa-profile @gol
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-fipa-pure-const @gol
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-fipa-reference @gol
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-fipa-reference-addressable @gol
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-fmerge-constants @gol
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@ -7959,11 +7965,11 @@ compilation time.
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-ftree-forwprop @gol
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-ftree-fre @gol
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-ftree-phiprop @gol
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-ftree-pta @gol
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-ftree-scev-cprop @gol
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-ftree-sink @gol
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-ftree-slsr @gol
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-ftree-sra @gol
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-ftree-pta @gol
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-ftree-ter @gol
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-funit-at-a-time}
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@ -7976,10 +7982,12 @@ and the performance of the generated code.
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@option{-O2} turns on all optimization flags specified by @option{-O}. It
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also turns on the following optimization flags:
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@gccoptlist{-fthread-jumps @gol
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-falign-functions -falign-jumps @gol
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-falign-loops -falign-labels @gol
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@c Please keep the following list alphabetized!
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@gccoptlist{-falign-functions -falign-jumps @gol
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-falign-labels -falign-loops @gol
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-fcaller-saves @gol
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-fcode-hoisting @gol
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-fcrossjumping @gol
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-fcse-follow-jumps -fcse-skip-blocks @gol
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-fdelete-null-pointer-checks @gol
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@ -7989,11 +7997,8 @@ also turns on the following optimization flags:
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-fhoist-adjacent-loads @gol
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-finline-small-functions @gol
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-findirect-inlining @gol
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-fipa-cp @gol
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-fipa-bit-cp @gol
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-fipa-vrp @gol
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-fipa-sra @gol
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-fipa-icf @gol
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-fipa-bit-cp -fipa-cp -fipa-icf @gol
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-fipa-ra -fipa-sra -fipa-vrp @gol
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-fisolate-erroneous-paths-dereference @gol
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-flra-remat @gol
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-foptimize-sibling-calls @gol
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@ -8003,16 +8008,15 @@ also turns on the following optimization flags:
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-freorder-blocks-algorithm=stc @gol
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-freorder-blocks-and-partition -freorder-functions @gol
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-frerun-cse-after-loop @gol
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-fsched-interblock -fsched-spec @gol
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-fschedule-insns -fschedule-insns2 @gol
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-fsched-interblock -fsched-spec @gol
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-fstore-merging @gol
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-fstrict-aliasing @gol
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-fthread-jumps @gol
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-ftree-builtin-call-dce @gol
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-ftree-switch-conversion -ftree-tail-merge @gol
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-fcode-hoisting @gol
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-ftree-pre @gol
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-ftree-vrp @gol
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-fipa-ra}
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-ftree-switch-conversion -ftree-tail-merge @gol
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-ftree-vrp}
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Please note the warning under @option{-fgcse} about
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invoking @option{-O2} on programs that use computed gotos.
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@ -8021,21 +8025,23 @@ invoking @option{-O2} on programs that use computed gotos.
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@opindex O3
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Optimize yet more. @option{-O3} turns on all optimizations specified
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by @option{-O2} and also turns on the following optimization flags:
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@gccoptlist{-finline-functions @gol
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-funswitch-loops @gol
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-fpredictive-commoning @gol
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-fgcse-after-reload @gol
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-ftree-loop-vectorize @gol
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-ftree-loop-distribution @gol
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-ftree-loop-distribute-patterns @gol
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@c Please keep the following list alphabetized!
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@gccoptlist{-fgcse-after-reload @gol
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-finline-functions @gol
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-fipa-cp-clone
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-floop-interchange @gol
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-floop-unroll-and-jam @gol
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-fsplit-paths @gol
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-ftree-slp-vectorize @gol
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-fvect-cost-model @gol
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-ftree-partial-pre @gol
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-fpeel-loops @gol
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-fipa-cp-clone}
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-fpredictive-commoning @gol
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-fsplit-paths @gol
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-ftree-loop-distribute-patterns @gol
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-ftree-loop-distribution @gol
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-ftree-loop-vectorize @gol
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-ftree-partial-pre @gol
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-ftree-slp-vectorize @gol
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-funswitch-loops @gol
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-fvect-cost-model}
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@item -O0
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@opindex O0
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@ -8044,13 +8050,16 @@ results. This is the default.
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@item -Os
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@opindex Os
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Optimize for size. @option{-Os} enables all @option{-O2} optimizations that
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do not typically increase code size. It also performs further
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optimizations designed to reduce code size.
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Optimize for size. @option{-Os} enables all @option{-O2} optimizations
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except those that often increase code size:
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@option{-Os} disables the following optimization flags:
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@gccoptlist{-falign-functions -falign-jumps -falign-loops @gol
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-falign-labels -fprefetch-loop-arrays}
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@gccoptlist{-falign-functions -falign-jumps @gol
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-falign-labels -falign-loops @gol
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-fprefetch-loop-arrays -freorder-blocks-algorithm=stc}
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It also enables @option{-finline-functions}, causes the compiler to tune for
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code size rather than execution speed, and performs further optimizations
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designed to reduce code size.
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@item -Ofast
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@opindex Ofast
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@ -8063,11 +8072,24 @@ specified, and @option{-fno-protect-parens}.
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@item -Og
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@opindex Og
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Optimize debugging experience. @option{-Og} enables optimizations
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that do not interfere with debugging. It should be the optimization
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Optimize debugging experience. @option{-Og} should be the optimization
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level of choice for the standard edit-compile-debug cycle, offering
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a reasonable level of optimization while maintaining fast compilation
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and a good debugging experience.
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and a good debugging experience. It is a better choice than @option{-O0}
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for producing debuggable code because some compiler passes
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that collect debug information are disabled at @option{-O0}.
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Like @option{-O0}, @option{-Og} completely disables a number of
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optimization passes so that individual options controlling them have
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no effect. Otherwise @option{-Og} enables all @option{-O1}
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optimization flags except for those that may interfere with debugging:
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@gccoptlist{-fbranch-count-reg -fdelayed-branch @gol
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-fif-conversion -fif-conversion2 @gol
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-finline-functions-called-once @gol
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-fmove-loop-invariants -fssa-phiopt @gol
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-ftree-bit-ccp -ftree-pta -ftree-sra}
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@end table
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If you use multiple @option{-O} options, with or without level numbers,
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@ -8194,7 +8216,8 @@ caller even if they are not marked @code{inline}. If a call to a given
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function is integrated, then the function is not output as assembler code
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in its own right.
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Enabled at levels @option{-O1}, @option{-O2}, @option{-O3} and @option{-Os}.
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Enabled at levels @option{-O1}, @option{-O2}, @option{-O3} and @option{-Os},
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but not @option{-Og}.
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@item -fearly-inlining
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@opindex fearly-inlining
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@ -8322,7 +8345,8 @@ IA-64 and S/390. Note that the @option{-fno-branch-count-reg} option
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doesn't remove the decrement and branch instructions from the generated
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instruction stream introduced by other optimization passes.
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The default is @option{-fbranch-count-reg} at @option{-O1} and higher.
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The default is @option{-fbranch-count-reg} at @option{-O1} and higher,
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except for @option{-Og}.
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@item -fno-function-cse
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@opindex fno-function-cse
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@ -8490,14 +8514,16 @@ includes use of conditional moves, min, max, set flags and abs instructions, and
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some tricks doable by standard arithmetics. The use of conditional execution
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on chips where it is available is controlled by @option{-fif-conversion2}.
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Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
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Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}, but
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not with @option{-Og}.
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@item -fif-conversion2
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@opindex fif-conversion2
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Use conditional execution (where available) to transform conditional jumps into
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branch-less equivalents.
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Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
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Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}, but
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not with @option{-Og}.
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@item -fdeclone-ctor-dtor
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@opindex fdeclone-ctor-dtor
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@ -9072,7 +9098,8 @@ enabled by default at @option{-O} and higher.
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Perform sparse conditional bit constant propagation on trees and propagate
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pointer alignment information.
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This pass only operates on local scalar variables and is enabled by default
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at @option{-O} and higher. It requires that @option{-ftree-ccp} is enabled.
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at @option{-O1} and higher, except for @option{-Og}.
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It requires that @option{-ftree-ccp} is enabled.
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@item -ftree-ccp
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@opindex ftree-ccp
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@ -9090,7 +9117,8 @@ enabled by default at @option{-O} and higher.
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@item -fssa-phiopt
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@opindex fssa-phiopt
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Perform pattern matching on SSA PHI nodes to optimize conditional
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code. This pass is enabled by default at @option{-O} and higher.
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code. This pass is enabled by default at @option{-O1} and higher,
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except for @option{-Og}.
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@item -ftree-switch-conversion
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@opindex ftree-switch-conversion
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@ -9312,13 +9340,14 @@ that have support for @option{-pthread}.
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@item -ftree-pta
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@opindex ftree-pta
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Perform function-local points-to analysis on trees. This flag is
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enabled by default at @option{-O} and higher.
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enabled by default at @option{-O1} and higher, except for @option{-Og}.
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@item -ftree-sra
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@opindex ftree-sra
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Perform scalar replacement of aggregates. This pass replaces structure
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references with scalars to prevent committing structures to memory too
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early. This flag is enabled by default at @option{-O} and higher.
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early. This flag is enabled by default at @option{-O1} and higher,
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except for @option{-Og}.
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@item -fstore-merging
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@opindex fstore-merging
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@ -10475,7 +10504,7 @@ Enabled with @option{-O3} and/or @option{-fprofile-use}.
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@item -fmove-loop-invariants
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@opindex fmove-loop-invariants
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Enables the loop invariant motion pass in the RTL loop optimizer. Enabled
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at level @option{-O1}
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at level @option{-O1} and higher, except for @option{-Og}.
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@item -fsplit-loops
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@opindex fsplit-loops
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153
gcc/opts.c
153
gcc/opts.c
@ -435,116 +435,127 @@ maybe_default_options (struct gcc_options *opts,
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lang_mask, handlers, loc, dc);
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}
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/* Table of options enabled by default at different levels. */
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/* Table of options enabled by default at different levels.
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Please keep this list sorted by level and alphabetized within
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each level; this makes it easier to keep the documentation
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in sync. */
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static const struct default_options default_options_table[] =
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{
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/* -O1 optimizations. */
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{ OPT_LEVELS_1_PLUS, OPT_fdefer_pop, NULL, 1 },
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#if DELAY_SLOTS
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{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fdelayed_branch, NULL, 1 },
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#endif
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{ OPT_LEVELS_1_PLUS, OPT_fguess_branch_probability, NULL, 1 },
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/* -O1 and -Og optimizations. */
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{ OPT_LEVELS_1_PLUS, OPT_fcombine_stack_adjustments, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fcompare_elim, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fcprop_registers, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fdefer_pop, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fforward_propagate, NULL, 1 },
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{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fif_conversion, NULL, 1 },
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{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fif_conversion2, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fguess_branch_probability, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fipa_profile, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fipa_pure_const, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fipa_reference, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fipa_reference_addressable, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fipa_profile, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fmerge_constants, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_freorder_blocks, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fshrink_wrap, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fsplit_wide_types, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_builtin_call_dce, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_ccp, NULL, 1 },
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{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_ftree_bit_ccp, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_ch, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_coalesce_vars, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_copy_prop, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_dce, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_dominator_opts, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_dse, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_ter, NULL, 1 },
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{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_ftree_sra, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_fre, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_copy_prop, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_sink, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_ch, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fcombine_stack_adjustments, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fcompare_elim, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_slsr, NULL, 1 },
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{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fbranch_count_reg, NULL, 1 },
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{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fmove_loop_invariants, NULL, 1 },
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{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_ftree_pta, NULL, 1 },
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{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fssa_phiopt, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_builtin_call_dce, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_ftree_ter, NULL, 1 },
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/* -O2 optimizations. */
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{ OPT_LEVELS_2_PLUS, OPT_finline_small_functions, NULL, 1 },
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{ OPT_LEVELS_2_PLUS, OPT_findirect_inlining, NULL, 1 },
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{ OPT_LEVELS_2_PLUS, OPT_fpartial_inlining, NULL, 1 },
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{ OPT_LEVELS_2_PLUS, OPT_fthread_jumps, NULL, 1 },
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{ OPT_LEVELS_2_PLUS, OPT_fcrossjumping, NULL, 1 },
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{ OPT_LEVELS_2_PLUS, OPT_foptimize_sibling_calls, NULL, 1 },
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{ OPT_LEVELS_2_PLUS, OPT_fcse_follow_jumps, NULL, 1 },
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{ OPT_LEVELS_2_PLUS, OPT_fgcse, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fexpensive_optimizations, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_frerun_cse_after_loop, NULL, 1 },
|
||||
/* -O1 (and not -Og) optimizations. */
|
||||
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fbranch_count_reg, NULL, 1 },
|
||||
#if DELAY_SLOTS
|
||||
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fdelayed_branch, NULL, 1 },
|
||||
#endif
|
||||
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fif_conversion, NULL, 1 },
|
||||
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fif_conversion2, NULL, 1 },
|
||||
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_finline_functions_called_once, NULL, 1 },
|
||||
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fmove_loop_invariants, NULL, 1 },
|
||||
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fssa_phiopt, NULL, 1 },
|
||||
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_ftree_bit_ccp, NULL, 1 },
|
||||
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_ftree_sra, NULL, 1 },
|
||||
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_ftree_pta, NULL, 1 },
|
||||
|
||||
/* -O2 and -Os optimizations. */
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fcaller_saves, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fcode_hoisting, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fcrossjumping, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fcse_follow_jumps, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fdevirtualize, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fdevirtualize_speculatively, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fexpensive_optimizations, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fgcse, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fhoist_adjacent_loads, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_findirect_inlining, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_finline_small_functions, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fipa_bit_cp, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fipa_cp, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fipa_icf, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fipa_ra, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fipa_sra, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fipa_vrp, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fisolate_erroneous_paths_dereference, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_flra_remat, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_foptimize_sibling_calls, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fpartial_inlining, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fpeephole2, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_freorder_functions, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_frerun_cse_after_loop, NULL, 1 },
|
||||
#ifdef INSN_SCHEDULING
|
||||
/* Only run the pre-regalloc scheduling pass if optimizing for speed. */
|
||||
{ OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_fschedule_insns, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fschedule_insns2, NULL, 1 },
|
||||
#endif
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fstrict_aliasing, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_freorder_blocks_algorithm_, NULL,
|
||||
REORDER_BLOCKS_ALGORITHM_STC },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_freorder_functions, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fcode_hoisting, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fstore_merging, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fthread_jumps, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_ftree_pre, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_ftree_switch_conversion, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fipa_cp, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fipa_bit_cp, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fipa_vrp, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fdevirtualize, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fdevirtualize_speculatively, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fipa_sra, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_falign_loops, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_ftree_tail_merge, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_CHEAP },
|
||||
|
||||
/* -O2 and -Os optimizations. */
|
||||
{ OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_falign_functions, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_falign_jumps, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_falign_labels, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_falign_functions, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_ftree_tail_merge, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_CHEAP },
|
||||
{ OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_falign_loops, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_foptimize_strlen, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fhoist_adjacent_loads, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fipa_icf, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fisolate_erroneous_paths_dereference, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fipa_ra, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_flra_remat, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS, OPT_fstore_merging, NULL, 1 },
|
||||
{ OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_freorder_blocks_algorithm_, NULL,
|
||||
REORDER_BLOCKS_ALGORITHM_STC },
|
||||
#ifdef INSN_SCHEDULING
|
||||
/* Only run the pre-regalloc scheduling pass if optimizing for speed. */
|
||||
{ OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_fschedule_insns, NULL, 1 },
|
||||
#endif
|
||||
|
||||
/* -O3 optimizations. */
|
||||
{ OPT_LEVELS_3_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_ftree_loop_distribution, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_floop_interchange, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_fpredictive_commoning, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_fsplit_paths, NULL, 1 },
|
||||
/* -O3 and -Os optimizations. */
|
||||
/* Inlining of functions reducing size is a good idea with -Os
|
||||
regardless of them being declared inline. */
|
||||
{ OPT_LEVELS_3_PLUS_AND_SIZE, OPT_finline_functions, NULL, 1 },
|
||||
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_finline_functions_called_once, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_fsplit_loops, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_funswitch_loops, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_floop_unroll_and_jam, NULL, 1 },
|
||||
|
||||
/* -O3 optimizations. */
|
||||
{ OPT_LEVELS_3_PLUS, OPT_fgcse_after_reload, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_ftree_loop_vectorize, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_ftree_slp_vectorize, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_DYNAMIC },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_fipa_cp_clone, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_ftree_partial_pre, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_floop_interchange, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_floop_unroll_and_jam, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_fpeel_loops, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_fpredictive_commoning, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_fsplit_loops, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_fsplit_paths, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_ftree_loop_distribution, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_ftree_loop_vectorize, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_ftree_partial_pre, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_ftree_slp_vectorize, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_funswitch_loops, NULL, 1 },
|
||||
{ OPT_LEVELS_3_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_DYNAMIC },
|
||||
|
||||
/* -Ofast adds optimizations to -O3. */
|
||||
{ OPT_LEVELS_FAST, OPT_ffast_math, NULL, 1 },
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user