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Subject: [Bug target/55195] [4.8 Regression] shorten_branches generates incorrect forward branch distances
Date: Thu, 06 Dec 2012 02:20:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55195

--- Comment #19 from John David Anglin <danglin at gcc dot gnu.org> 2012-12-06 02:19:57 UTC ---
Author: danglin
Date: Thu Dec  6 02:19:48 2012
New Revision: 194238

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=194238
Log:
    Backport for mainline:
    2011-11-30  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>

    PR middle-end/50283
    * config/pa/pa.md (in_branch_delay): Disallow frame related insns.
    (in_nullified_branch_delay): Likewise.
    (in_call_delay): Likewise.

    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.

    2012-12-05  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>

    * config/pa/pa.md: Use "const_int 0" instead of match_test to simplify
    opaque cond in all call insns.


Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/config/pa/pa.c
    branches/gcc-4_6-branch/gcc/config/pa/pa.h
    branches/gcc-4_6-branch/gcc/config/pa/pa.md