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* [Bug rtl-optimization/49357] [4.7 Regression] register allocation worse
  2011-06-10  2:54 [Bug rtl-optimization/49357] New: [4.7 Regression] register allocation worse hp at gcc dot gnu.org
@ 2011-06-10  2:54 ` hp at gcc dot gnu.org
  2011-06-10  9:35 ` rguenth at gcc dot gnu.org
  2011-10-10 11:53 ` [Bug rtl-optimization/49357] " rguenth at gcc dot gnu.org
  2 siblings, 0 replies; 4+ messages in thread
From: hp at gcc dot gnu.org @ 2011-06-10  2:54 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49357

Hans-Peter Nilsson <hp at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |SUSPENDED
   Last reconfirmed|                            |2011.06.10 02:54:33
     Ever Confirmed|0                           |1


^ permalink raw reply	[flat|nested] 4+ messages in thread
* [Bug rtl-optimization/49357] New: [4.7 Regression] register allocation worse
@ 2011-06-10  2:54 hp at gcc dot gnu.org
  2011-06-10  2:54 ` [Bug rtl-optimization/49357] " hp at gcc dot gnu.org
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: hp at gcc dot gnu.org @ 2011-06-10  2:54 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49357

           Summary: [4.7 Regression] register allocation worse
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hp@gcc.gnu.org
              Host: x86_64-unknown-linux-gnu
            Target: cris-axis-elf


Compare the prologue for the test-case in attachment 24471 to PR49154 and
compiled according to those instructions,
<http://gcc.gnu.org/bugzilla/attachment.cgi?id=24471> between 4.3.3 (everything
before the first "add"):
    subq 4,$sp
    move $srp,[$sp]
    subq 12,$sp
    movem $r2,[$sp]
    move.d $r10,$r2
    move.d $r10,$r9
    move.d $r11,$r10

to that of trunk at r174114 as well as r174870:
        subq 4,$sp
        move $srp,[$sp]
        subq 16,$sp
        movem $r3,[$sp]
        subq 4,$sp
        move.d $r8,[$sp]
        move.d $r10,$r8
        move.d $r11,$r9

So, we have a regression from 3 to 5 registers, and with a hole compared to
reg_alloc_order.  Note that the source uses DFmode and DImode and derived
unions; at a glance "normal" code is less affected.  Building on a 32-bit host
seems to aggravate the situation.

Just put here as a note for the time being.


^ permalink raw reply	[flat|nested] 4+ messages in thread
* [Bug rtl-optimization/49357] [4.7 Regression] register allocation worse
  2011-06-10  2:54 [Bug rtl-optimization/49357] New: [4.7 Regression] register allocation worse hp at gcc dot gnu.org
  2011-06-10  2:54 ` [Bug rtl-optimization/49357] " hp at gcc dot gnu.org
@ 2011-06-10  9:35 ` rguenth at gcc dot gnu.org
  2011-10-10 11:53 ` [Bug rtl-optimization/49357] " rguenth at gcc dot gnu.org
  2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-06-10  9:35 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49357

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.7.0


^ permalink raw reply	[flat|nested] 4+ messages in thread
* [Bug rtl-optimization/49357] register allocation worse
  2011-06-10  2:54 [Bug rtl-optimization/49357] New: [4.7 Regression] register allocation worse hp at gcc dot gnu.org
  2011-06-10  2:54 ` [Bug rtl-optimization/49357] " hp at gcc dot gnu.org
  2011-06-10  9:35 ` rguenth at gcc dot gnu.org
@ 2011-10-10 11:53 ` rguenth at gcc dot gnu.org
  2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-10-10 11:53 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49357

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ra
      Known to work|                            |4.3.3
   Target Milestone|4.7.0                       |---
            Summary|[4.7 Regression] register   |register allocation worse
                   |allocation worse            |
      Known to fail|                            |4.7.0

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-10 11:51:30 UTC ---
Removing regression markers for suspended bug.


^ permalink raw reply	[flat|nested] 4+ messages in thread
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2011-06-10  2:54 [Bug rtl-optimization/49357] New: [4.7 Regression] register allocation worse hp at gcc dot gnu.org
2011-06-10  2:54 ` [Bug rtl-optimization/49357] " hp at gcc dot gnu.org
2011-06-10  9:35 ` rguenth at gcc dot gnu.org
2011-10-10 11:53 ` [Bug rtl-optimization/49357] " rguenth at gcc dot gnu.org

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