This repository contains lists of compiler flags used by the GCC 13 compiler suite when a certain CPU architecture is set via the -march= command-line option. Based on the given CPU architecture certain compiler flags will be set internally.
A list of supported CPU architectures in combination with -march=... is given here. The corresponding GCC compiler flags for the 64-bit targets can be found in ./architectures/. The program diff is helpful to find changes between architectures, e.g. to find differences in compiler flags between -march=x86-64 and -march=x86-64-v2 (diff -u x86-64.txt x86-64-v2.txt | grep '^[+-]' | tail -n+3).
+ -mcrc32 [enabled]
+ -mcx16 [enabled]
- -mno-sse4 [enabled]
+ -mmwait [enabled]
+ -mpopcnt [enabled]
+ -msahf [enabled]
+ -msse3 [enabled]
+ -msse4 [enabled]
+ -msse4.1 [enabled]
+ -msse4.2 [enabled]
+ -mssse3 [enabled]
+ -mavx [enabled]
+ -mavx2 [enabled]
+ -mbmi [enabled]
+ -mbmi2 [enabled]
+ -mf16c [enabled]
+ -mfma [enabled]
+ -mlzcnt [enabled]
+ -mmovbe [enabled]
+ -mxsave [enabled]
+ -mavx512bw [enabled]
+ -mavx512cd [enabled]
+ -mavx512dq [enabled]
+ -mavx512f [enabled]
+ -mavx512vl [enabled]
Different optimization levels can be set by the -O flag in GCC: -O0, -O1, -O2, -O3, -Og, -Os, -Ofast. This will internally set certain compiler flags for certain optimization techniques. The different optimization flags are explained in the documentation.
+ -fgcse-after-reload [enabled]
+ -fipa-cp-clone [enabled]
+ -floop-interchange [enabled]
+ -floop-unroll-and-jam [enabled]
+ -fpeel-loops [enabled]
+ -fpredictive-commoning [enabled]
+ -fsplit-loops [enabled]
+ -fsplit-paths [enabled]
+ -ftree-loop-distribution [enabled]
+ -ftree-partial-pre [enabled]
+ -funroll-completely-grow-size [enabled]
+ -funswitch-loops [enabled]
+ -fversion-loops-for-strides [enabled]
+ -fallow-store-data-races [enabled]
+ -fassociative-math [enabled]
+ -fcx-limited-range [enabled]
+ -ffinite-math-only [enabled]
- -fmath-errno [enabled]
+ -freciprocal-math [enabled]
- -fsemantic-interposition [enabled]
- -fsigned-zeros [enabled]
- -ftrapping-math [enabled]
+ -funsafe-math-optimizations [enabled]
+ -falign-functions [enabled]
+ -falign-jumps [enabled]
+ -falign-labels [enabled]
+ -falign-loops [enabled]
+ -foptimize-strlen [enabled]
+ -ftree-loop-vectorize [enabled]
+ -ftree-slp-vectorize [enabled]
+ -funroll-loops [enabled]
+ -falign-functions [enabled]
+ -falign-jumps [enabled]
+ -falign-labels [enabled]
+ -falign-loops [enabled]
+ -fcaller-saves [enabled]
+ -fcode-hoisting [enabled]
+ -fcrossjumping [enabled]
+ -fcse-follow-jumps [enabled]
+ -fdevirtualize [enabled]
+ -fdevirtualize-speculatively [enabled]
+ -fexpensive-optimizations [enabled]
+ -fgcse [enabled]
+ -fhoist-adjacent-loads [enabled]
+ -findirect-inlining [enabled]
+ -finline-functions [enabled]
+ -finline-small-functions [enabled]
+ -fipa-bit-cp [enabled]
+ -fipa-cp [enabled]
+ -fipa-icf [enabled]
+ -fipa-icf-functions [enabled]
+ -fipa-icf-variables [enabled]
+ -fipa-ra [enabled]
+ -fipa-sra [enabled]
+ -fipa-vrp [enabled]
+ -fisolate-erroneous-paths-dereference [enabled]
+ -flra-remat [enabled]
+ -foptimize-sibling-calls [enabled]
+ -foptimize-strlen [enabled]
+ -fpartial-inlining [enabled]
+ -fpeephole2 [enabled]
+ -free [enabled]
+ -freorder-blocks-and-partition [enabled]
+ -freorder-functions [enabled]
+ -frerun-cse-after-loop [enabled]
+ -fschedule-insns2 [enabled]
+ -fstore-merging [enabled]
+ -fstrict-aliasing [enabled]
+ -ftree-loop-distribute-patterns [enabled]
+ -ftree-loop-vectorize [enabled]
+ -ftree-pre [enabled]
+ -ftree-slp-vectorize [enabled]
+ -ftree-switch-conversion [enabled]
+ -ftree-tail-merge [enabled]
+ -ftree-vrp [enabled]
+ -funroll-loops [enabled]
+ -fbranch-count-reg [enabled]
+ -fcombine-stack-adjustments [enabled]
+ -fcompare-elim [enabled]
+ -fcprop-registers [enabled]
+ -fdefer-pop [enabled]
+ -fdse [enabled]
+ -fforward-propagate [enabled]
+ -fguess-branch-probability [enabled]
+ -fif-conversion [enabled]
+ -fif-conversion2 [enabled]
+ -finline [enabled]
+ -finline-functions-called-once [enabled]
+ -fipa-modref [enabled]
+ -fipa-profile [enabled]
+ -fipa-pure-const [enabled]
+ -fipa-reference [enabled]
+ -fipa-reference-addressable [enabled]
+ -fmove-loop-invariants [enabled]
+ -fmove-loop-stores [enabled]
+ -fomit-frame-pointer [enabled]
+ -freorder-blocks [enabled]
+ -fshrink-wrap [enabled]
+ -fsplit-wide-types [enabled]
+ -fssa-phiopt [enabled]
+ -fthread-jumps [enabled]
+ -ftoplevel-reorder [enabled]
+ -ftree-bit-ccp [enabled]
+ -ftree-builtin-call-dce [enabled]
+ -ftree-ccp [enabled]
+ -ftree-ch [enabled]
+ -ftree-coalesce-vars [enabled]
+ -ftree-copy-prop [enabled]
+ -ftree-dce [enabled]
+ -ftree-dominator-opts [enabled]
+ -ftree-dse [enabled]
+ -ftree-fre [enabled]
+ -ftree-pta [enabled]
- -funreachable-traps [enabled]
+ -ftree-sink [enabled]
+ -ftree-slsr [enabled]
+ -ftree-sra [enabled]
+ -ftree-ter [enabled]