[Bug rtl-optimization/44481] New: __builtin_parity() causes ICE in trunc_int_for_mode()

[Bug rtl-optimization/44481] New: __builtin_parity() causes ICE in trunc_int_for_mode()

[rainy6144 at gmail dot com]

When compiling the following program with -O2, gcc gives an ICE "internal
compiler error: in trunc_int_for_mode, at explow.c:56".

Versions affected:
gcc (GCC) 4.4.3 20100127 (Red Hat 4.4.3-4)
gcc (GCC) 4.5.1 20100521 (prerelease)

================================================
static inline unsigned parity(unsigned x)
{
  return (unsigned) __builtin_parity(x);
}

unsigned f(unsigned rpoly)
{
  return parity(rpoly & 1) ^ parity(rpoly & 6);
}
================================================


-- 
           Summary: __builtin_parity() causes ICE in trunc_int_for_mode()
           Product: gcc
           Version: 4.5.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rainy6144 at gmail dot com
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44481

[Bug rtl-optimization/44481] [4.3/4.4/4.5/4.6 Regression] __builtin_parity() causes ICE in trunc_int_for_mode()

[hjl dot tools at gmail dot com]

------- Comment #1 from hjl dot tools at gmail dot com  2010-06-11 18:24 -------
It is caused by revision 121863:

http://gcc.gnu.org/ml/gcc-cvs/2007-02/msg00421.html


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |uros
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-06-11 18:24:48
               date|                            |
            Summary|__builtin_parity() causes   |[4.3/4.4/4.5/4.6 Regression]
                   |ICE in trunc_int_for_mode() |__builtin_parity() causes
                   |                            |ICE in trunc_int_for_mode()
   Target Milestone|---                         |4.4.5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44481

[Bug target/44481] [4.3/4.4/4.5/4.6 Regression] __builtin_parity() causes ICE in trunc_int_for_mode()

[ubizjak at gmail dot com]

------- Comment #2 from ubizjak at gmail dot com  2010-06-11 19:54 -------
Generic parts do not like parity in CCmode.


-- 

ubizjak at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |ubizjak at gmail dot com
                   |dot org                     |
             Status|NEW                         |ASSIGNED
          Component|rtl-optimization            |target
   Last reconfirmed|2010-06-11 18:24:48         |2010-06-11 19:54:41
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44481

[Bug target/44481] [4.3/4.4/4.5/4.6 Regression] __builtin_parity() causes ICE in trunc_int_for_mode()

[ubizjak at gmail dot com]

------- Comment #3 from ubizjak at gmail dot com  2010-06-11 19:55 -------
Created an attachment (id=20895)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20895&action=view)
Patch to fix the failure.

Patch in testing.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44481

[Bug target/44481] [4.3/4.4/4.5/4.6 Regression] __builtin_parity() causes ICE in trunc_int_for_mode()

[uros at gcc dot gnu dot org]

------- Comment #4 from uros at gcc dot gnu dot org  2010-06-11 21:58 -------
Subject: Bug 44481

Author: uros
Date: Fri Jun 11 21:58:31 2010
New Revision: 160638

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=160638
Log:
        PR target/44481
        * config/i386/i386.md (UNSPEC_PARITY): New unspec.
        (paritydi2_cmp): Use UNSPEC_PARITY unspec insted of parity RTX.
        (partiysi2_cmp): Ditto.
        (*partiyhi2_cmp): Ditto.
        (*parityqi2_cmp): Remove.

testsuite/ChangeLog:

        PR target/44481
        * gcc.target/i386/pr44481.c: New test.


Added:
    trunk/gcc/testsuite/gcc.target/i386/pr44481.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.md
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44481

[Bug target/44481] [4.3/4.4/4.5/4.6 Regression] __builtin_parity() causes ICE in trunc_int_for_mode()

[uros at gcc dot gnu dot org]

------- Comment #5 from uros at gcc dot gnu dot org  2010-06-12 06:29 -------
Subject: Bug 44481

Author: uros
Date: Sat Jun 12 06:29:44 2010
New Revision: 160647

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=160647
Log:
        PR target/44481
        * config/i386/i386.md (UNSPEC_PARITY): New unspec.
        (paritydi2_cmp): Use UNSPEC_PARITY unspec insted of parity RTX.
        (partiysi2_cmp): Ditto.
        (*partiyhi2_cmp): Ditto.
        (*parityqi2_cmp): Remove.

testsuite/ChangeLog:

        PR target/44481
        * gcc.target/i386/pr44481.c: New test.


Added:
    branches/gcc-4_5-branch/gcc/testsuite/gcc.target/i386/pr44481.c
Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/config/i386/i386.md
    branches/gcc-4_5-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44481

[Bug target/44481] [4.3/4.4/4.5/4.6 Regression] __builtin_parity() causes ICE in trunc_int_for_mode()

[uros at gcc dot gnu dot org]

------- Comment #6 from uros at gcc dot gnu dot org  2010-06-12 07:43 -------
Subject: Bug 44481

Author: uros
Date: Sat Jun 12 07:43:40 2010
New Revision: 160654

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=160654
Log:
        PR target/44481
        * config/i386/i386.md (UNSPEC_PARITY): New unspec.
        (paritydi2_cmp): Use UNSPEC_PARITY unspec insted of parity RTX.
        (partiysi2_cmp): Ditto.
        (*partiyhi2_cmp): Ditto.
        (*parityqi2_cmp): Remove.

testsuite/ChangeLog:

        PR target/44481
        * gcc.target/i386/pr44481.c: New test.


Added:
    branches/gcc-4_4-branch/gcc/testsuite/gcc.target/i386/pr44481.c
Modified:
    branches/gcc-4_4-branch/gcc/ChangeLog
    branches/gcc-4_4-branch/gcc/config/i386/i386.md
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44481

[Bug target/44481] [4.3/4.4/4.5/4.6 Regression] __builtin_parity() causes ICE in trunc_int_for_mode()

[uros at gcc dot gnu dot org]

------- Comment #7 from uros at gcc dot gnu dot org  2010-06-13 08:52 -------
Subject: Bug 44481

Author: uros
Date: Sun Jun 13 08:51:51 2010
New Revision: 160672

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=160672
Log:
        PR target/44481
        * config/i386/i386.md (UNSPEC_PARITY): New unspec.
        (paritydi2_cmp): Use UNSPEC_PARITY unspec insted of parity RTX.
        (partiysi2_cmp): Ditto.
        (*partiyhi2_cmp): Ditto.
        (*parityqi2_cmp): Remove.

testsuite/ChangeLog:

        PR target/44481
        * gcc.target/i386/pr44481.c: New test.


Added:
    branches/gcc-4_3-branch/gcc/testsuite/gcc.target/i386/pr44481.c
Modified:
    branches/gcc-4_3-branch/gcc/ChangeLog
    branches/gcc-4_3-branch/gcc/config/i386/i386.md
    branches/gcc-4_3-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44481

[Bug target/44481] [4.3/4.4/4.5/4.6 Regression] __builtin_parity() causes ICE in trunc_int_for_mode()

[ubizjak at gmail dot com]

------- Comment #8 from ubizjak at gmail dot com  2010-06-13 08:54 -------
Fixed.


-- 

ubizjak at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|4.4.5                       |4.3.6


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44481