[Bug target/34087] New: ICE in regrename.c for movdf_hardfloat64_mfpgpr

[Bug target/34087] New: ICE in regrename.c for movdf_hardfloat64_mfpgpr

[pthaugen at gcc dot gnu dot org]

The following attatchment from the cpu20006 benchmark leslie3d ICEs in the
following manner. The problem appears to be a latent bug that has come and gone
a couple times (I saw it earlier on the gamess benchmark too).  Recent
mainlines compile it fine, but revision 128829 exhibits the problem.  Opening a
bugzilla since I haven't been able to spend as much time digging into it as I'd
thought/hoped, and don't want to lose track of it.

> gfortran -c -m64 -O2 -mcpu=power6x -fpeel-loops -ffast-math junk.f
junk.f: In function 'setiv':
junk.f:913: error: insn does not satisfy its constraints:
(insn 5218 2288 4792 191 (set (reg:DF 46 14 [2631])
        (reg:DF 65 lr [1528])) 335 {*movdf_hardfloat64_mfpgpr}
(expr_list:REG_DEAD (reg:DF 65 lr [1528])
        (nil)))
junk.f:913: internal compiler error: in build_def_use, at regrename.c:766
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


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           Summary: ICE in regrename.c for movdf_hardfloat64_mfpgpr
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pthaugen at gcc dot gnu dot org
 GCC build triplet: powerpc64-linux
  GCC host triplet: powerpc64-linux
GCC target triplet: powerpc64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34087

[Bug target/34087] ICE in regrename.c for movdf_hardfloat64_mfpgpr

[pthaugen at gcc dot gnu dot org]

------- Comment #1 from pthaugen at gcc dot gnu dot org  2007-11-13 21:08 -------
Created an attachment (id=14549)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14549&action=view)
Testcase


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34087

[Bug target/34087] ICE in regrename.c for movdf_hardfloat64_mfpgpr

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2007-11-13 21:57 -------
This is not the first time something like this has shown up before.


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
           Keywords|                            |ice-on-valid-code, ra


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34087

[Bug target/34087] ICE in regrename.c for movdf_hardfloat64_mfpgpr

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2008-09-15 19:56 -------
IIRC reload only uses the first set of movdi patterns to see if the move is
generatable. 


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34087