[Bug rtl-optimization/55204] New: [4.8 Regression] ICE: in extract_insn, at recog.c:2140 (unrecognizable insn) with -O --param loop-invariant-max-bbs-in-loop=0

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55204



             Bug #: 55204

           Summary: [4.8 Regression] ICE: in extract_insn, at recog.c:2140

                    (unrecognizable insn) with -O --param

                    loop-invariant-max-bbs-in-loop=0

    Classification: Unclassified

           Product: gcc

           Version: 4.8.0

            Status: UNCONFIRMED

          Severity: normal

          Priority: P3

         Component: rtl-optimization

        AssignedTo: unassig...@gcc.gnu.org

        ReportedBy: zso...@seznam.cz





Created attachment 28610

  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28610

reduced testcase



Compiler output:

$ gcc -O --param loop-invariant-max-bbs-in-loop=0 testcase.ctestcase.c: In

function 'f1':

testcase.c:18:1: error: unrecognizable insn:

 }

 ^

(insn 53 50 24 5 (set (reg:SI 5 di [77])

        (plus:SI (subreg:SI (reg:HI 7 sp) 0)

            (const_int -248 [0xffffffffffffff08]))) testcase.c:13 -1

     (nil))

testcase.c:18:1: internal compiler error: in extract_insn, at recog.c:2140

0x9969ea _fatal_insn(char const*, rtx_def const*, char const*, int, char

const*)

        /mnt/svn/gcc-trunk/gcc/rtl-error.c:110

0x996a7a _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)

        /mnt/svn/gcc-trunk/gcc/rtl-error.c:118

0x9524d8 extract_insn(rtx_def*)

        /mnt/svn/gcc-trunk/gcc/recog.c:2140

0x9526eb extract_insn_cached(rtx_def*)

        /mnt/svn/gcc-trunk/gcc/recog.c:2043

0x79f91d cleanup_subreg_operands(rtx_def*)

        /mnt/svn/gcc-trunk/gcc/final.c:2968

0x94dc60 split_insn

        /mnt/svn/gcc-trunk/gcc/recog.c:2857

0x956401 split_all_insns()

        /mnt/svn/gcc-trunk/gcc/recog.c:2911

0x956558 rest_of_handle_split_after_reload

        /mnt/svn/gcc-trunk/gcc/recog.c:3795

Please submit a full bug report,

with preprocessed source if appropriate.

Please include the complete backtrace with any bug report.

See <http://gcc.gnu.org/bugs.html> for instructions.



Tested revisions:

r193125 - crash

r192654 - OK

r191586 - OK

4.7 r191640 - OK