[Bug target/44067] New: internal compiler error: in rs6000_split_multireg_move, at config/rs6000/rs6000.c:16713

[Bug target/44067] New: internal compiler error: in rs6000_split_multireg_move, at config/rs6000/rs6000.c:16713

[raj dot khem at gmail dot com]

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gcc 4.5.0 fails to build libgcc when configured as follows

/scratch/oe/calamari/work/ppce500v2-oe-linux-gnuspe/gcc-cross-initial-4.5.0-r0/gcc-4.5.0/configure
--build=x86_64-linux --host=x86_64-linux --target=powerpc-oe-linux-gnuspe
--prefix=/scratch/oe/calamari/cross/ppce500v2
--exec_prefix=/scratch/oe/calamari/cross/ppce500v2
--bindir=/scratch/oe/calamari/cross/ppce500v2/bin
--sbindir=/scratch/oe/calamari/cross/ppce500v2/bin
--libexecdir=/scratch/oe/calamari/cross/ppce500v2/libexec
--datadir=/scratch/oe/calamari/cross/ppce500v2/share
--sysconfdir=/scratch/oe/calamari/cross/ppce500v2/etc
--sharedstatedir=/scratch/oe/calamari/cross/ppce500v2/com
--localstatedir=/scratch/oe/calamari/cross/ppce500v2/var
--libdir=/scratch/oe/calamari/cross/ppce500v2/lib
--includedir=/scratch/oe/calamari/cross/ppce500v2/include
--oldincludedir=/scratch/oe/calamari/cross/ppce500v2/include
--infodir=/scratch/oe/calamari/cross/ppce500v2/share/info
--mandir=/scratch/oe/calamari/cross/ppce500v2/share/man
--with-local-prefix=/scratch/oe/calamari/sysroots/ppce500v2-oe-linux-gnuspe/usr
--with-newlib --without-headers --disable-shared --disable-threads
--disable-multilib --disable-__cxa_atexit --enable-languages=c
--program-prefix=powerpc-oe-linux-gnuspe-
--with-sysroot=/scratch/oe/calamari/sysroots/ppce500v2-oe-linux-gnuspe
--with-build-sysroot=/scratch/oe/calamari/sysroots/ppce500v2-oe-linux-gnuspe
--disable-libmudflap --disable-libgomp --disable-libssp
--enable-decimal-float=no --program-prefix=powerpc-oe-linux-gnuspe-


It fails in libgcc 

/scratch/oe/calamari/work/ppce500v2-oe-linux-gnuspe/gcc-cross-initial-4.5.0-r0/gcc-4.5.0/build.x86_64-linux.powerpc-oe-linux-gnuspe/./gcc/xgcc
-B/scratch/oe/calamari/work/ppce500v2-oe-linux-gnuspe/gcc-cross-initial-4.5.0-r0/gcc-4.5.0/build.x86_64-linux.powerpc-oe-linux-gnuspe/./gcc/
-mcpu=8548 -mspe=yes -mabi=spe -mfloat-gprs=double
-isystem/scratch/oe/calamari/sysroots/ppce500v2-oe-linux-gnuspe/usr/include
-B/scratch/oe/calamari/cross/ppce500v2/powerpc-oe-linux-gnuspe/bin/
-B/scratch/oe/calamari/cross/ppce500v2/powerpc-oe-linux-gnuspe/lib/ -isystem
/scratch/oe/calamari/cross/ppce500v2/powerpc-oe-linux-gnuspe/include -isystem
/scratch/oe/calamari/cross/ppce500v2/powerpc-oe-linux-gnuspe/sys-include
--sysroot=/scratch/oe/calamari/sysroots/ppce500v2-oe-linux-gnuspe  
-isystem/scratch/oe/calamari/sysroots/x86_64-linux/usr/include -O2 -g -O2 
-isystem/scratch/oe/calamari/sysroots/x86_64-linux/usr/include -O2 -g -DIN_GCC
-DCROSS_DIRECTORY_STRUCTURE  -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include  -fPIC -g  -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -Dinhibit_libc -I.
-I. -I../.././gcc
-I/scratch/oe/calamari/work/ppce500v2-oe-linux-gnuspe/gcc-cross-initial-4.5.0-r0/gcc-4.5.0/libgcc
-I/scratch/oe/calamari/work/ppce500v2-oe-linux-gnuspe/gcc-cross-initial-4.5.0-r0/gcc-4.5.0/libgcc/.
-I/scratch/oe/calamari/work/ppce500v2-oe-linux-gnuspe/gcc-cross-initial-4.5.0-r0/gcc-4.5.0/libgcc/../gcc
-I/scratch/oe/calamari/work/ppce500v2-oe-linux-gnuspe/gcc-cross-initial-4.5.0-r0/gcc-4.5.0/libgcc/../include
 -DHAVE_CC_TLS  -o _powidf2.o -MT _powidf2.o -MD -MP -MF _powidf2.dep
-DL_powidf2 -c
/scratch/oe/calamari/work/ppce500v2-oe-linux-gnuspe/gcc-cross-initial-4.5.0-r0/gcc-4.5.0/libgcc/../gcc/libgcc2.c
/scratch/oe/calamari/work/ppce500v2-oe-linux-gnuspe/gcc-cross-initial-4.5.0-r0/gcc-4.5.0/libgcc/../gcc/libgcc2.c:
In function ‘__powidf2’:
/scratch/oe/calamari/work/ppce500v2-oe-linux-gnuspe/gcc-cross-initial-4.5.0-r0/gcc-4.5.0/libgcc/../gcc/libgcc2.c:1739:1:
internal compiler error: in rs6000_split_multireg_move, at
config/rs6000/rs6000.c:16713
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


If I remove -mfloat-gprs=double from the commandline then the ICE does not
happen.


-- 
           Summary: internal compiler error: in rs6000_split_multireg_move,
                    at config/rs6000/rs6000.c:16713
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: raj dot khem at gmail dot com
 GCC build triplet: x86_64-linux
  GCC host triplet: x86_64-linux
GCC target triplet: powerpc-oe-linux-gnuspe


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44067

[Bug target/44067] internal compiler error: in rs6000_split_multireg_move, at config/rs6000/rs6000.c:16713

[amodra at gmail dot com]

------- Comment #1 from amodra at gmail dot com  2010-06-07 02:19 -------
First testcase in pr44364 tickles this bug on mainline too.  Looks like we need
the following.

Index: gcc/config/rs6000/rs6000.c
===================================================================
--- gcc/config/rs6000/rs6000.c  (revision 160351)
+++ gcc/config/rs6000/rs6000.c  (working copy)
@@ -17013,7 +17013,7 @@ rs6000_split_multireg_move (rtx dst, rtx
        ((TARGET_HARD_FLOAT && TARGET_DOUBLE_FLOAT) ? DFmode : SFmode);
   else if (ALTIVEC_REGNO_P (reg))
     reg_mode = V16QImode;
-  else if (TARGET_E500_DOUBLE && mode == TFmode)
+  else if (TARGET_E500_DOUBLE && (mode == DFmode || mode == TFmode))
     reg_mode = DFmode;
   else
     reg_mode = word_mode;


-- 

amodra at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-06-07 02:20:00
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44067

[Bug target/44067] internal compiler error: in rs6000_split_multireg_move, at config/rs6000/rs6000.c:16713

[amodra at gmail dot com]

------- Comment #2 from amodra at gmail dot com  2010-06-07 02:21 -------
*** Bug 44419 has been marked as a duplicate of this bug. ***


-- 

amodra at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |edmar at freescale dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44067

[Bug target/44067] internal compiler error: in rs6000_split_multireg_move, at config/rs6000/rs6000.c:16713

[gcc at breakpoint dot cc]

------- Comment #3 from gcc at breakpoint dot cc  2010-06-07 04:21 -------
Thank you Alan.
Trunk and 4.5 branch is affected, the 4.4 branch just built.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44067

[Bug target/44067] internal compiler error: in rs6000_split_multireg_move, at config/rs6000/rs6000.c:16713

[amodra at gmail dot com]

------- Comment #4 from amodra at gmail dot com  2010-06-07 06:57 -------
Actually, that's the wrong patch.  The correct one stops
rs6000_split_multireg_move being called in this case, by modifying
define_mode_iterator DIFD in rs6000.md.


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amodra at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |amodra at gmail dot com
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2010-06-07 02:20:00         |2010-06-07 06:57:49
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44067

[Bug target/44067] internal compiler error: in rs6000_split_multireg_move, at config/rs6000/rs6000.c:16713

[amodra at gmail dot com]

------- Comment #5 from amodra at gmail dot com  2010-06-07 17:25 -------
Created an attachment (id=20859)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20859&action=view)
fix pr42427 fallout

Would someone with e500 hardware please bootstrap and regression test this
patch?  I'm running powerpc-linux bootstrap to ensure pr42427 doesn't regress.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44067

[Bug target/44067] internal compiler error: in rs6000_split_multireg_move, at config/rs6000/rs6000.c:16713

[bergner at gcc dot gnu dot org]

------- Comment #6 from bergner at gcc dot gnu dot org  2010-06-07 20:50 -------
I believe Edmar already bootstrapped and regtested the same patch.

  http://gcc.gnu.org/ml/gcc-patches/2010-06/msg00346.html


-- 

bergner at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bergner at gcc dot gnu dot
                   |                            |org
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2010-
                   |                            |06/msg00346.html


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44067

[Bug target/44067] internal compiler error: in rs6000_split_multireg_move, at config/rs6000/rs6000.c:16713

[bergner at gcc dot gnu dot org]

------- Comment #7 from bergner at gcc dot gnu dot org  2010-06-07 20:55 -------
I'll note that the thread I pointed to in the previous comment mentioned that I
thought we should be handling DDmode the same as DFmode (normally we do), but
Joseph's post here:

  http://gcc.gnu.org/ml/gcc-patches/2008-06/msg00270.html

shows why we don't want to do that for the e500.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44067

[Bug target/44067] internal compiler error: in rs6000_split_multireg_move, at config/rs6000/rs6000.c:16713

[amodra at gmail dot com]

------- Comment #8 from amodra at gmail dot com  2010-06-07 23:33 -------
Reassigning since Edmar's identical patch predates mine.


-- 

amodra at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|amodra at gmail dot com     |edmar at freescale dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44067

[Bug target/44067] internal compiler error: in rs6000_split_multireg_move, at config/rs6000/rs6000.c:16713

[amodra at gcc dot gnu dot org]

------- Comment #9 from amodra at gcc dot gnu dot org  2010-06-09 00:16 -------
Subject: Bug 44067

Author: amodra
Date: Wed Jun  9 00:15:46 2010
New Revision: 160449

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=160449
Log:
        PR target/44067
        * config/rs6000/rs6000.md (DIFD): Do not split dpfp values for
        e500v2 target.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000.md


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44067

[Bug target/44067] internal compiler error: in rs6000_split_multireg_move, at config/rs6000/rs6000.c:16713

[amodra at gcc dot gnu dot org]

------- Comment #10 from amodra at gcc dot gnu dot org  2010-06-09 00:20 -------
Subject: Bug 44067

Author: amodra
Date: Wed Jun  9 00:20:27 2010
New Revision: 160454

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=160454
Log:
        PR target/44067
        * config/rs6000/rs6000.md (DIFD): Do not split dpfp values for
        e500v2 target.


Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/config/rs6000/rs6000.md


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44067

[Bug target/44067] internal compiler error: in rs6000_split_multireg_move, at config/rs6000/rs6000.c:16713

[amodra at gmail dot com]

------- Comment #11 from amodra at gmail dot com  2010-06-09 00:29 -------
Fixed


-- 

amodra at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.5.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44067

[Bug target/44067] internal compiler error: in rs6000_split_multireg_move, at config/rs6000/rs6000.c:16713

[bergner at gcc dot gnu dot org]

------- Comment #12 from bergner at gcc dot gnu dot org  2010-06-09 14:15 -------
Subject: Bug 44067

Author: bergner
Date: Wed Jun  9 14:15:11 2010
New Revision: 160479

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=160479
Log:
        Backport from mainline:

        2010-06-09  Edmar Wienskoski  <edmar@freescale.com>

        PR target/44067
        * config/rs6000/rs6000.md (DIFD): Do not split dpfp values for
        e500v2 target.

Modified:
    branches/ibm/gcc-4_4-branch/gcc/ChangeLog.ibm
    branches/ibm/gcc-4_4-branch/gcc/config/rs6000/rs6000.md


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44067