[Bug tree-optimization/56161] New: label: jmp label bug in 4.8.0-0.7

["hvtaifwkbgefbaei at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56161

             Bug #: 56161
           Summary: label: jmp label bug in 4.8.0-0.7
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hvtaifwkbgefbaei@gmail.com


Created attachment 29314
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29314
dcraw adobe_coeff.c bug

dcraw function adobe_coeff function with -O1 or higher:

        movw    %ax, black(%rip)        # D.2960, black
.L7:
        movslq  %ebx, %rax      # i, i
        leaq    (%rax,%rax,4), %rax     #, tmp119
        movzwl  table.2869+10(,%rax,8), %eax    # table[i_40].maximum, D.2960
        testw   %ax, %ax        # D.2960
        je      .L8     #,
        movw    %ax, maximum(%rip)      # D.2960, maximum
.L8:
        movslq  %ebx, %rbx      # i, i
        leaq    (%rbx,%rbx,4), %rax     #, tmp126
        cmpw    $0, table.2869+12(,%rax,8)      #, table[i_40].trans
        je      .L5     #,
.L10:
        jmp     .L10    #
.L6:
        addl    $1, %ebx        #, i
        addq    $40, %rbp       #, ivtmp.38
        cmpl    $5, %ebx        #, i
        jne     .L11    #,
.L5:
        addq    $152, %rsp      #,
        .cfi_def_cfa_offset 40
        popq    %rbx    #


here, jmp .L10 is what I do not like very much.
with -fno-tree-dce this code generation bug does not happen.