[Bug rtl-optimization/48334] New: [4.7 Regression] gcc.target/i386/pr39445.c FAILs with -fira-algorithm=priority

[Bug rtl-optimization/48334] New: [4.7 Regression] gcc.target/i386/pr39445.c FAILs with -fira-algorithm=priority

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48334

           Summary: [4.7 Regression] gcc.target/i386/pr39445.c FAILs with
                    -fira-algorithm=priority
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 23802
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23802
reduced testcase

Output:
$ gcc -O -fira-algorithm=priority testcase.c
$ ./a.out 
Program received signal SIGSEGV, Segmentation fault.
0x0000000000400537 in foo (a1=<value optimized out>, a2=..., a3=..., a4=...,
a5=..., a6=..., a7=..., a8=..., b1=1, b2=2, b3=3, b4=4, b5=5, 
    b6=6, b7=-1, y=...) at testcase.c:8
8       {
(gdb) disassemble
Dump of assembler code for function foo:
   0x0000000000400534 <+0>:     xorps  %xmm0,%xmm0
=> 0x0000000000400537 <+3>:     movaps %xmm0,0x10(%rsp)
   0x000000000040053c <+8>:     movlps 0x10(%rsp),%xmm0
   0x0000000000400541 <+13>:    movlps %xmm0,0x10(%rsp)
   0x0000000000400546 <+18>:    movlps 0x18(%rsp),%xmm0
   0x000000000040054b <+23>:    movlps %xmm0,0x18(%rsp)
   0x0000000000400550 <+28>:    movaps 0x10(%rsp),%xmm0
   0x0000000000400555 <+33>:    retq   
End of assembler dump.
(gdb) i r rsp
rsp            0x7fffffffde28   0x7fffffffde28

The problem is unaligned access.
As in PR48331, the code generated by priority allocator is much worse than with
CB's one. The code with both allocators was the same in r171626.

[Bug rtl-optimization/48334] [4.7 Regression] gcc.target/i386/pr39445.c FAILs with -fira-algorithm=priority

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48334

Zdenek Sojka <zsojka at seznam dot cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vmakarov at gcc dot gnu.org

--- Comment #1 from Zdenek Sojka <zsojka at seznam dot cz> 2011-03-29 14:32:47 UTC ---
It started with http://gcc.gnu.org/viewcvs?view=revision&revision=171649

[Bug rtl-optimization/48334] [4.7 Regression] gcc.target/i386/pr39445.c FAILs with -fira-algorithm=priority

[vmakarov at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48334

--- Comment #2 from Vladimir Makarov <vmakarov at gcc dot gnu.org> 2011-03-29 20:51:18 UTC ---
Author: vmakarov
Date: Tue Mar 29 20:51:14 2011
New Revision: 171699

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=171699
Log:
2011-03-29  Vladimir Makarov  <vmakarov@redhat.com>

    PR rtl-optimization/48331
    PR rtl-optimization/48334
    * ira-color.c (color_allocnos): Call setup_profitable_hard_regs
    for any used algorithm.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ira-color.c

[Bug rtl-optimization/48334] [4.7 Regression] gcc.target/i386/pr39445.c FAILs with -fira-algorithm=priority

[hp at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48334

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hp at gcc dot gnu.org

--- Comment #3 from Hans-Peter Nilsson <hp at gcc dot gnu.org> 2011-03-30 01:39:10 UTC ---
Should this be closed now?

[Bug rtl-optimization/48334] [4.7 Regression] gcc.target/i386/pr39445.c FAILs with -fira-algorithm=priority

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48334

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.7.0

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-03-30 08:39:47 UTC ---
Assumed fixed.