[Bug target/58172] New: ifcvt test failures for armv8-a

[Bug target/58172] New: ifcvt test failures for armv8-a

[janis at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58172

            Bug ID: 58172
           Summary: ifcvt test failures for armv8-a
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: janis at gcc dot gnu.org
                CC: ramana at gcc dot gnu.org
            Target: arm-none-eabi

The following test failures are regressions from GCC 4.8 for arm-none-eabi with
multilib flags that include "-march=armv8-a":

    gcc.target/arm/thumb-ifcvt.c scan-assembler asrne
    gcc.target/arm/thumb-ifcvt.c scan-assembler lslne
    gcc.target/arm/thumb2-cond-cmp-1.c scan-assembler cmpne
    gcc.target/arm/thumb2-cond-cmp-2.c scan-assembler cmpeq
    gcc.target/arm/thumb2-cond-cmp-3.c scan-assembler cmpgt
    gcc.target/arm/thumb2-cond-cmp-4.c scan-assembler cmpne

The failures begin with this patch:

------------------------------------------------------------------------
r197346 | ramana | 2013-04-02 04:25:50 -0700 (Tue, 02 Apr 2013) | 17 lines

Add support for Cortex-A53.

2013-04-02  Ian Caulfield  <ian.caulfield@arm.com>
            Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

        * config/arm/arm-arches.def (armv8-a): Default to cortex-a53.
        * config/arm/t-arm (MD_INCLUDES): Depend on cortex-a53.md.
        * config/arm/cortex-a53.md: New file.
        * config/arm/bpabi.h (BE8_LINK_SPEC): Handle cortex-a53.
        * config/arm/arm.md (generic_sched, generic_vfp): Handle cortex-a53.
        * config/arm/arm.c (arm_issue_rate): Likewise.
        * config/arm/arm-tune.md: Regenerate
        * config/arm/arm-tables.opt: Regenerate.
        * config/arm/arm-cores.def: Add cortex-a53.
------------------------------------------------------------------------

If the tests aren't expected to use conditional instructions for armv8-a then
they should be skipped for use of that flag.

[Bug target/58172] ifcvt test failures for armv8-a

[rearnsha at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58172

Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-08-21
     Ever confirmed|0                           |1

--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Furthermore, reworking the testcase for thumb-ifcvt.c shows that some
legitimate cases are now being missed, such as lsl<c> Ld, Ln, #1.

[Bug target/58172] ifcvt test failures for armv8-a

[ktkachov at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58172

ktkachov at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |ktkachov at gcc dot gnu.org
         Resolution|---                         |FIXED

--- Comment #2 from ktkachov at gcc dot gnu.org ---
These tests pass with multilib -march=armv8-a flags in current trunk (r206577)

The lsl<c> Ld, Ln, #1 is now being caught I believe.

Closing as fixed, please reopen if you find them failing in some configuration.