[Bug rtl-optimization/46441] New: [4.5 Regression] ICE: RTL check: expected code 'reg', have 'plus' in rhs_regno, at rtl.h:1053 with -fsel-sched-pipelining -fselective-scheduling2

[Bug rtl-optimization/46441] New: [4.5 Regression] ICE: RTL check: expected code 'reg', have 'plus' in rhs_regno, at rtl.h:1053 with -fsel-sched-pipelining -fselective-scheduling2

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46441

           Summary: [4.5 Regression] ICE: RTL check: expected code 'reg',
                    have 'plus' in rhs_regno, at rtl.h:1053 with
                    -fsel-sched-pipelining -fselective-scheduling2
           Product: gcc
           Version: 4.5.2
            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 22378
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22378
reduced testcase

I come to this ICE often when testing the 4.5 branch. There are several
testcases failing with various flags, but -fsel-sched-pipelining
-fselective-scheduling2 seems to be the common denominator.

Compiler output:
$ gcc -O -fschedule-insns2 -fsel-sched-pipelining -fselective-scheduling2
-fno-tree-loop-optimize testcase.c
testcase.c: In function 'foo':
testcase.c:6:1: internal compiler error: RTL check: expected code 'reg', have
'plus' in rhs_regno, at rtl.h:1053
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r166509 - OK
r163636 - OK
r161659 - crash
4.5 r166509 - crash
4.4 r166509 - OK

[Bug rtl-optimization/46441] [4.5 Regression] ICE: RTL check: expected code 'reg', have 'plus' in rhs_regno, at rtl.h:1053 with -fsel-sched-pipelining -fselective-scheduling2

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46441

Zdenek Sojka <zsojka at seznam dot cz> changed:

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

--- Comment #1 from Zdenek Sojka <zsojka at seznam dot cz> 2010-11-12 00:46:02 UTC ---
Sorry, this seems to be a dup of PR44691. Is there a reason not to backport
that to 4.5 (it's in 4.6 and 4.4)?

Thanks

[Bug rtl-optimization/46441] [4.5 Regression] ICE: RTL check: expected code 'reg', have 'plus' in rhs_regno, at rtl.h:1053 with -fsel-sched-pipelining -fselective-scheduling2

[amonakov at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46441

Alexander Monakov <amonakov at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |amonakov at gcc dot gnu.org
         Resolution|                            |DUPLICATE

--- Comment #2 from Alexander Monakov <amonakov at gcc dot gnu.org> 2010-11-12 11:58:25 UTC ---
(In reply to comment #1)
> Sorry, this seems to be a dup of PR44691. Is there a reason not to backport
> that to 4.5 (it's in 4.6 and 4.4)?

No, it looks like an oversight.  Thanks for finding the original bug, we'll
backport the patch.

*** This bug has been marked as a duplicate of bug 44691 ***