https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63965
--- Comment #3 from Pat Haugen <pthaugen at gcc dot gnu.org> --- Created attachment 34043 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34043&action=edit reduced testcase Another example of error, from CPU2000 benchmark 188.ammp. Compiled with 'gcc -c -m32 -O2 -mcpu=power7 -ffast-math unonbon.c'. unonbon.c:63:1: error: insn does not satisfy its constraints: } ^ (insn 140 88 272 4 (set (reg:DF 108 31 [374]) (mem/u/c:DF (lo_sum:SI (reg:SI 9 9 [377]) (symbol_ref/u:SI ("*.LC1") [flags 0x82])) [2 S8 A64])) 466 {*movdf_hardfloat32} (expr_list:REG_EQUIV (const_double:DF 1.0e+0 [0x0.8p+1]) (nil))) unonbon.c:63:1: internal compiler error: in extract_constrain_insn, at recog.c:2230 0x106df363 _fatal_insn(char const*, rtx_def const*, char const*, int, char const*) /home/pthaugen/src/gcc/trunk/gcc/gcc/rtl-error.c:110 0x106df3bb _fatal_insn_not_found(rtx_def const*, char const*, int, char const*) /home/pthaugen/src/gcc/trunk/gcc/gcc/rtl-error.c:121 0x106a5e6f extract_constrain_insn(rtx_insn*) /home/pthaugen/src/gcc/trunk/gcc/gcc/recog.c:2230 0x10680a83 reload_cse_simplify_operands /home/pthaugen/src/gcc/trunk/gcc/gcc/postreload.c:415 0x10681b4b reload_cse_simplify /home/pthaugen/src/gcc/trunk/gcc/gcc/postreload.c:134 0x10681b4b reload_cse_regs_1 /home/pthaugen/src/gcc/trunk/gcc/gcc/postreload.c:231 0x106834cb reload_cse_regs /home/pthaugen/src/gcc/trunk/gcc/gcc/postreload.c:79 0x106834cb execute /home/pthaugen/src/gcc/trunk/gcc/gcc/postreload.c:2352 Please submit a full bug report,
