[Bug target/55195] [4.8 Regression] shorten_branches generates incorrect forward branch distances

[danglin at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55195

--- Comment #18 from John David Anglin <danglin at gcc dot gnu.org> 2012-12-01 20:36:08 UTC ---
Author: danglin
Date: Sat Dec  1 20:36:04 2012
New Revision: 194027

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=194027
Log:
    Backport from mainline:
    2012-11-12  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>

    PR target/55195
    * config/pa/pa.md (type): Add sibcall and sh_func_adrs insn types.
    (in_branch_delay): Don't allow sibcall or sh_func_adrs insns.
    (in_nullified_branch_delay): Likewise.
    (in_call_delay): Likewise.
    Define delay for sibcall insns.  Adjust Z3 and Z4 insn reservations for
    new types.  Add opaque cond to mark all calls, sibcalls, dyncalls and
    the $$sh_func_adrs call as variable.  Update type of sibcalls and
    $$sh_func_adrs call.
    * config/pa/pa.c (pa_adjust_insn_length): Revise to return updated
    length instead of adjustment.  Handle negative and undefined call
    adjustments for insn_default_length.  Remove adjustment for millicode
    insn with unfilled delay slot.
    (pa_output_millicode_call): Update for revised millicode length.
    * config/pa/pa.h (ADJUST_INSN_LENGTH): Revise to set LENGTH.


Modified:
    branches/gcc-4_7-branch/gcc/ChangeLog
    branches/gcc-4_7-branch/gcc/config/pa/pa.c
    branches/gcc-4_7-branch/gcc/config/pa/pa.h
    branches/gcc-4_7-branch/gcc/config/pa/pa.md