[Bug tree-optimization/61560] New: FAIL: gcc.dg/tree-ssa/ssa-fre-32.c on arm

[Bug tree-optimization/61560] New: FAIL: gcc.dg/tree-ssa/ssa-fre-32.c on arm

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61560

            Bug ID: 61560
           Summary: FAIL: gcc.dg/tree-ssa/ssa-fre-32.c on arm
           Product: gcc
           Version: 4.10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ktkachov at gcc dot gnu.org

Created attachment 32972
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=32972&action=edit
fre pass diff between bad and good dumps

On arm-none-eabi I see a regression in the aforementioned test:
FAIL: gcc.dg/tree-ssa/ssa-fre-32.c scan-tree-dump-times fre1 "return
x_\\d+\\(D\\);" 2

Curiously this doesn't happen for an aarch64-none-elf target built from the
same revision (r211782)

I'm attaching the diff between the failing (bad) fre dump for arm and the
passing (good) dump from aarch64

[Bug tree-optimization/61560] FAIL: gcc.dg/tree-ssa/ssa-fre-32.c on arm

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61560

ktkachov at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
             Target|                            |arm-none-eabi
                 CC|                            |rguenther at suse dot de
      Known to work|                            |4.9.0
      Known to fail|                            |4.10.0

--- Comment #1 from ktkachov at gcc dot gnu.org ---
cc'ing richi as he touched that test and area last.

[Bug testsuite/61560] [4.10 Regression] FAIL: gcc.dg/tree-ssa/ssa-fre-32.c on arm

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61560

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2014-06-23
          Component|tree-optimization           |testsuite
   Target Milestone|---                         |4.10.0
            Summary|FAIL:                       |[4.10 Regression] FAIL:
                   |gcc.dg/tree-ssa/ssa-fre-32. |gcc.dg/tree-ssa/ssa-fre-32.
                   |c on arm                    |c on arm
     Ever confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's a testsuite issue, arm returns _Complex float in memory it seems so
we can't propagate a register into the return stmt.

I'll think of a good solution.

[Bug testsuite/61560] [4.10 Regression] FAIL: gcc.dg/tree-ssa/ssa-fre-32.c on arm

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61560

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.

[Bug testsuite/61560] [4.10 Regression] FAIL: gcc.dg/tree-ssa/ssa-fre-32.c on arm

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61560

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jun 25 08:37:37 2014
New Revision: 211970

URL: https://gcc.gnu.org/viewcvs?rev=211970&root=gcc&view=rev
Log:
2014-06-25  Richard Biener  <rguenther@suse.de>

    PR testsuite/61560
    * gcc.dg/tree-ssa/ssa-fre-32.c: Change to avoid differences
    for targets that return _Complex float in memory.

Modified:
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-32.c