[Bug rtl-optimization/56921] New: [4.8 Regression] ICE in rtx_cost

[dje at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56921



             Bug #: 56921

           Summary: [4.8 Regression] ICE in rtx_cost

    Classification: Unclassified

           Product: gcc

           Version: 4.9.0

            Status: UNCONFIRMED

          Severity: normal

          Priority: P3

         Component: rtl-optimization

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

        ReportedBy: d...@gcc.gnu.org





libgomp.c++/for-3.C produces a segfault in GCC.



Program received signal SIGSEGV, Segmentation fault.

_Z8rtx_costP7rtx_def8rtx_codeib (x=0x70824514, outer_code=270238820, opno=0, 

    speed=true) at /nasfarm/dje/src/src/gcc/rtlanal.c:3802



(gdb) where

#0  _Z8rtx_costP7rtx_def8rtx_codeib (x=0x70824514, outer_code=270238820, 

    opno=0, speed=true) at /nasfarm/dje/src/src/gcc/rtlanal.c:3802

#1  0x109f4e98 in _Z21doloop_optimize_loopsv ()

    at /nasfarm/dje/src/src/gcc/loop-doloop.c:2125

#2  0x109d0db8 in _ZL10rtl_doloopv ()

    at /nasfarm/dje/src/src/gcc/loop-init.c:543

#3  0x106370f8 in _Z16execute_one_passP8opt_pass (pass=0x3019aa00)

    at /nasfarm/dje/src/src/gcc/passes.c:2329

#4  0x10637590 in _Z17execute_pass_listP8opt_pass (pass=0x3019aa00)

    at /nasfarm/dje/src/src/gcc/passes.c:2380

#5  0x106375a8 in _Z17execute_pass_listP8opt_pass (pass=0x3019ab50)

    at /nasfarm/dje/src/src/gcc/passes.c:2381

#6  0x106375a8 in _Z17execute_pass_listP8opt_pass (pass=0x301b59c8)

    at /nasfarm/dje/src/src/gcc/passes.c:2381

#7  0x10545f54 in _ZL15expand_functionP11cgraph_node (node=0x70419dc0)

    at /nasfarm/dje/src/src/gcc/cgraphunit.c:1640

#8  0x1054821c in _Z7compilev () at /nasfarm/dje/src/src/gcc/cgraphunit.c:3710

#9  0x10548da4 in _Z25finalize_compilation_unitv ()

    at /nasfarm/dje/src/src/gcc/cgraphunit.c:2119

#10 0x107517b8 in _Z28cp_write_global_declarationsv ()

    at /nasfarm/dje/src/src/gcc/cp/decl2.c:4324

#11 0x10000b14 in _ZL12compile_filev ()



3797      /* Sum the costs of the sub-rtx's, plus cost of this operation,

3798         which is already in total.  */

3799    

3800      fmt = GET_RTX_FORMAT (code);

3801      for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)

3802        if (fmt[i] == 'e')

3803          total += rtx_cost (XEXP (x, i), code, i, speed);

3804        else if (fmt[i] == 'E')

3805          for (j = 0; j < XVECLEN (x, i); j++)

3806            total += rtx_cost (XVECEXP (x, i, j), code, i, speed);