# cpp 优化头
可以在 csp 考场上开 O2 优化。
#pragma GCC optimize(2) | |
#pragma GCC optimize(3) | |
#pragma GCC optimize("Ofast") | |
#pragma GCC optimize("inline") | |
#pragma GCC optimize("-fgcse") | |
#pragma GCC optimize("-fgcse-lm") | |
#pragma GCC optimize("-fipa-sra") | |
#pragma GCC optimize("-ftree-pre") | |
#pragma GCC optimize("-ftree-vrp") | |
#pragma GCC optimize("-fpeephole2") | |
#pragma GCC optimize("-ffast-math") | |
#pragma GCC optimize("-fsched-spec") | |
#pragma GCC optimize("unroll-loops") | |
#pragma GCC optimize("-falign-jumps") | |
#pragma GCC optimize("-falign-loops") | |
#pragma GCC optimize("-falign-labels") | |
#pragma GCC optimize("-fdevirtualize") | |
#pragma GCC optimize("-fcaller-saves") | |
#pragma GCC optimize("-fcrossjumping") | |
#pragma GCC optimize("-fthread-jumps") | |
#pragma GCC optimize("-funroll-loops") | |
#pragma GCC optimize("-fwhole-program") | |
#pragma GCC optimize("-freorder-blocks") | |
#pragma GCC optimize("-fschedule-insns") | |
#pragma GCC optimize("inline-functions") | |
#pragma GCC optimize("-ftree-tail-merge") | |
#pragma GCC optimize("-fschedule-insns2") | |
#pragma GCC optimize("-fstrict-aliasing") | |
#pragma GCC optimize("-fstrict-overflow") | |
#pragma GCC optimize("-falign-functions") | |
#pragma GCC optimize("-fcse-skip-blocks") | |
#pragma GCC optimize("-fcse-follow-jumps") | |
#pragma GCC optimize("-fsched-interblock") | |
#pragma GCC optimize("-fpartial-inlining") | |
#pragma GCC optimize("no-stack-protector") | |
#pragma GCC optimize("-freorder-functions") | |
#pragma GCC optimize("-findirect-inlining") | |
#pragma GCC optimize("-fhoist-adjacent-loads") | |
#pragma GCC optimize("-frerun-cse-after-loop") | |
#pragma GCC optimize("inline-small-functions") | |
#pragma GCC optimize("-finline-small-functions") | |
#pragma GCC optimize("-ftree-switch-conversion") | |
#pragma GCC optimize("-foptimize-sibling-calls") | |
#pragma GCC optimize("-fexpensive-optimizations") | |
#pragma GCC optimize("-funsafe-loop-optimizations") | |
#pragma GCC optimize("inline-functions-called-once") | |
#pragma GCC optimize("-fdelete-null-pointer-checks") |
# Reference
- acwing: cpp 优化头