[Bug rtl-optimization/55838] [4.6/4.7/4.8 Regression] ICE in extract_insn (unrecognizable insn) with -O -funroll-loops

[steven at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55838



--- Comment #8 from Steven Bosscher <steven at gcc dot gnu.org> 2013-01-01 
20:44:12 UTC ---

I would expect the insn to match the movqi_internal insn:



(define_insn "*movqi_internal"

  [(set (match_operand:QI 0 "nonimmediate_operand" "=q,q ,q ,r,r ,?r,m")

        (match_operand:QI 1 "general_operand"      " q,qn,qm,q,rn,qm,qn"))]

  "!(MEM_P (operands[0]) && MEM_P (operands[1]))"



But (const_int 129) isn't a general_operand:



#3  0x0000000000997327 in extract_insn (insn=0x7ffff6c85870) at

../../trunk/gcc/recog.c:2152

2152        fatal_insn_not_found (insn);

(gdb) p debug_rtx(insn)

(insn 93 92 94 3 (set (reg:QI 127)

        (const_int 129 [0x81])) -1

     (nil))

$34 = void

(gdb) p debug_rtx(PATTERN(insn))

(set (reg:QI 127)

    (const_int 129 [0x81]))

$35 = void

(gdb) p debug_rtx(SET_DEST (PATTERN(insn)))

(reg:QI 127)

$36 = void

(gdb) p debug_rtx(SET_SRC (PATTERN(insn)))

(const_int 129 [0x81])

$37 = void

(gdb) p nonimmediate_operand(SET_DEST (PATTERN(insn)),QImode)

$38 = 1

(gdb) p general_operand(SET_SRC (PATTERN(insn)),QImode)

$39 = 0

(gdb)