https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71596
--- Comment #2 from Sergey <saguryev.gnu at gmail dot com> --- ( may be related to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70902 ? ) - genrecog crashes with segv if built with gcc@r235523 and later after emitting first 32k of its output -- stack trace below; - it's genrecog.c:init_pattern_use() which is compiled incorrectly at -O2; if compiled at -O1 ( with all others remaining at -O2 ), the problem vanishes; - also, the problem shows up with -march= nehalem, sandybridge and newer archs; if built with -march=nocona or silvermont, it works fine. build/genrecog ../../gcc/gcc/common.md ../../gcc/gcc/config/i386/i386.md insn-conditions.md /* Generated automatically by the program `genrecog' from the target ..... longest path: 195 (code: 77) longest backtrack: 17 (code: 156) Program received signal SIGSEGV, Segmentation fault. populate_pattern_routine (cpi=cpi@entry=0x7fffffffd980, sinfo=0x4387040, news=news@entry=0x4387090, params=...) at ../../gcc/gcc/genrecog.c:2842 2842 decision *d = sinfo->s->singleton (); (gdb) p sinfo->s $3 = (state *) 0x0 (gdb) bt #0 populate_pattern_routine (cpi=cpi@entry=0x7fffffffd980, sinfo=0x4387040, news=news@entry=0x4387090, params=...) at ../../gcc/gcc/genrecog.c:2842 #1 0x00000000004175e5 in populate_pattern_routine (cpi=cpi@entry=0x7fffffffd980, sinfo=0x7ffff7208ee0, news=<optimized out>, params=...) at ../../gcc/gcc/genrecog.c:2907 #2 0x0000000000417a91 in init_pattern_use (cpi=cpi@entry=0x7fffffffd980, sinfo=0x7ffff7208ee0, params=...) at ../../gcc/gcc/genrecog.c:2788 #3 0x000000000041728f in populate_pattern_routine (cpi=cpi@entry=0x7fffffffe190, sinfo=0x7ffff71f7348, news=news@entry=0x4386b10, params=...) at ../../gcc/gcc/genrecog.c:2912 #4 0x00000000004175e5 in populate_pattern_routine (cpi=cpi@entry=0x7fffffffe190, sinfo=0x7ffff71e9fe0, news=news@entry=0x4386aa0, params=...) at ../../gcc/gcc/genrecog.c:2907 #5 0x00000000004175e5 in populate_pattern_routine (cpi=cpi@entry=0x7fffffffe190, sinfo=0x7ffff71e0d78, news=news@entry=0x4386a30, params=...) at ../../gcc/gcc/genrecog.c:2907 #6 0x00000000004175e5 in populate_pattern_routine (cpi=cpi@entry=0x7fffffffe190, sinfo=0x7ffff71da6f8, news=news@entry=0x43869c0, params=...) at ../../gcc/gcc/genrecog.c:2907 #7 0x00000000004175e5 in populate_pattern_routine (cpi=cpi@entry=0x7fffffffe190, sinfo=0x7ffff71d7520, news=news@entry=0x4386950, params=...) at ../../gcc/gcc/genrecog.c:2907 #8 0x00000000004175e5 in populate_pattern_routine (cpi=cpi@entry=0x7fffffffe190, sinfo=0x7ffff71d5608, news=<optimized out>, params=...) at ../../gcc/gcc/genrecog.c:2907 #9 0x0000000000417a91 in init_pattern_use (cpi=cpi@entry=0x7fffffffe190, sinfo=sinfo@entry=0x7ffff71d5608, params=...) at ../../gcc/gcc/genrecog.c:2788 #10 0x00000000004034e1 in use_pattern (sinfo=<optimized out>) at ../../gcc/gcc/genrecog.c:2993 #11 split_out_patterns (states=...) at ../../gcc/gcc/genrecog.c:3243 #12 main (argc=<optimized out>, argv=<optimized out>) at ../../gcc/gcc/genrecog.c:5317
