[Bug c++/11738] New: ICE "could not split insn" building libstdc++-v3

[Bug c++/11738] New: ICE "could not split insn" building libstdc++-v3

[steve at chelsio dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11738

           Summary: ICE "could not split insn" building libstdc++-v3
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: critical
          Priority: P1
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: steve at chelsio dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: xscale-unknown-elf

CVS, fresh 'cvs update' run 2003-07-29 1630PDT.
Created combined tree per the simtest-howto.
Configured with "../combined/configure --target=xscale-elf
--prefix=/usr/local/xscale --with-gnu-as --with-gnu-ld --with-newlib
--disable-nls --enable-languages=c,c++"
Ensuing make fails thus:
make[6]: Entering directory
`/users/steve/gnu-toolchain/build.arm/xscale-elf/iwmmxt/libstdc++-v3/src'
[ snip ]
/users/steve/gnu-toolchain/build.arm/gcc/xgcc -shared-libgcc
-B/users/steve/gnu-toolchain/build
.arm/gcc/ -nostdinc++
-L/users/steve/gnu-toolchain/build.arm/xscale-elf/iwmmxt/libstdc++-v3/src
 -L/users/steve/gnu-toolchain/build.arm/xscale-elf/iwmmxt/libstdc++-v3/src/.libs
-nostdinc -B/u
sers/steve/gnu-toolchain/build.arm/xscale-elf/iwmmxt/newlib/ -isystem
/users/steve/gnu-toolchai
n/build.arm/xscale-elf/iwmmxt/newlib/targ-include -isystem
/users/steve/gnu-toolchain/combined/
newlib/libc/include -B/usr/local/xscale/xscale-elf/bin/
-B/usr/local/xscale/xscale-elf/lib/ -is
ystem /usr/local/xscale/xscale-elf/include -isystem
/usr/local/xscale/xscale-elf/sys-include -L
/users/steve/gnu-toolchain/build.arm/ld -mcpu=iwmmxt -nostdinc++
-I/users/steve/gnu-toolchain/b
uild.arm/xscale-elf/iwmmxt/libstdc++-v3/include/xscale-elf
-I/users/steve/gnu-toolchain/build.a
rm/xscale-elf/iwmmxt/libstdc++-v3/include
-I../../../../../combined/libstdc++-v3/libsupc++ -I..
/../../../../combined/libstdc++-v3/libmath -O2 -O -g -O2 -mcpu=iwmmxt
-fno-implicit-templates -
Wall -Wno-format -W -Wwrite-strings -fdiagnostics-show-location=once -c
../../../../../combined
/libstdc++-v3/src/codecvt.cc -o codecvt.o
../../../../../combined/libstdc++-v3/src/codecvt.cc: In member function `
   virtual int std::codecvt<char, char, mbstate_t>::do_length(mbstate_t&, const
   char*, const char*, long unsigned int) const':
../../../../../combined/libstdc++-v3/src/codecvt.cc:113: error: could not split
   insn
(insn:HI 89 108 58 bits/stl_algobase.h:148 (parallel [
            (set (reg/v/f:SI 2 r2 [orig:78 __b ] [78])
                (if_then_else:SI (geu (reg:SI 3 r3 [81])
                        (reg:SI 1 r1 [84]))
                    (plus:SI (reg:SI 0 r0)
                        (const_int 4 [0x4]))
                    (reg/v/f:SI 2 r2 [orig:78 __b ] [78])))
            (clobber (reg:CC 24 cc))
        ]) 228 {*ifcompare_plus_move} (insn_list 21 (insn_list 22 (insn_list 94
(insn_list 32 (
insn_list 95 (nil))))))
    (expr_list:REG_DEAD (reg:SI 3 r3 [81])
        (expr_list:REG_DEAD (reg:SI 1 r1 [84])
            (expr_list:REG_DEAD (reg:SI 0 r0)
                (expr_list:REG_UNUSED (reg:CC 24 cc)
                    (nil))))))
../../../../../combined/libstdc++-v3/src/codecvt.cc:113: internal compiler error: in
   final_scan_insn, at final.c:2443
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
make[6]: *** [codecvt.lo] Error 1
make[6]: Leaving directory
`/users/steve/gnu-toolchain/build.arm/xscale-elf/iwmmxt/libstdc++-v3
/src'
make[5]: *** [all-recursive] Error 1
make[5]: Leaving directory
`/users/steve/gnu-toolchain/build.arm/xscale-elf/iwmmxt/libstdc++-v3
'
make[4]: *** [all-recursive-am] Error 2
make[4]: Leaving directory
`/users/steve/gnu-toolchain/build.arm/xscale-elf/iwmmxt/libstdc++-v3
'
make[3]: *** [multi-do] Error 1
make[3]: Leaving directory
`/users/steve/gnu-toolchain/build.arm/xscale-elf/libstdc++-v3'
make[2]: *** [all-multi] Error 2
make[2]: Leaving directory
`/users/steve/gnu-toolchain/build.arm/xscale-elf/libstdc++-v3'
make[1]: *** [all-recursive-am] Error 2
make[1]: Leaving directory
`/users/steve/gnu-toolchain/build.arm/xscale-elf/libstdc++-v3'
make: *** [all-target-libstdc++-v3] Error 2

[Bug c++/11738] ICE "could not split insn" building libstdc++-v3

[steve at chelsio dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11738



------- Additional Comments From steve at chelsio dot com  2003-07-31 06:10 -------
Created an attachment (id=4529)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=4529&action=view)
preprocessed source

Little bitty 151 line file sure gets large when preprocessed.

[Bug c++/11738] ICE "could not split insn" building libstdc++-v3

[janis187 at us dot ibm dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11738


janis187 at us dot ibm dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |nickc at redhat dot com


------- Additional Comments From janis187 at us dot ibm dot com  2003-08-01 17:22 -------
The failure is with -mcpu=iwmmxt, whose support was added 2003-06-18
by Nick Clifton.  An xscale-elf cross cc1plus on i686-pc-linux-gnu
from just after that support was added gets the same error when the
attachment from comment #1 is compiled with "-mcpu=iwmmxt -O2 -g".

[Bug c++/11738] ICE "could not split insn" building libstdc++-v3

[pinskia at physics dot uc dot edu]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11738


pinskia at physics dot uc dot edu changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
   Target Milestone|3.4                         |---

[Bug c++/11738] ICE "could not split insn" building libstdc++-v3

[pinskia at physics dot uc dot edu]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11738


pinskia at physics dot uc dot edu changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|critical                    |normal
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2003-08-05 13:58:14
               date|                            |


------- Additional Comments From pinskia at physics dot uc dot edu  2003-08-05 13:58 -------
Taking Janis's comment as a confirming this problem.

[Bug c++/11738] ICE "could not split insn" building libstdc++-v3

[nickc at redhat dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11738



------- Additional Comments From nickc at redhat dot com  2003-08-08 08:27 -------
Subject: Re:  ICE "could not split insn" building
 libstdc++-v3

Hi Guys,

The attached patch is a workaround for the problem.  It disables the
split that is causing the problems when the compiler is generating
code for the iWMMXt.

At the moment I have no idea why the split is not working properly, or
why the problem should appear to be iWMMXt specific.  I am still
looking into this.

Cheers
        Nick

Index: gcc/config/arm/arm.md
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/arm/arm.md,v
retrieving revision 1.140
diff -c -3 -p -r1.140 arm.md
*** gcc/config/arm/arm.md	12 Jul 2003 23:02:22 -0000	1.140
--- gcc/config/arm/arm.md	8 Aug 2003 08:10:56 -0000
***************
*** 7043,7049 ****
  			  (match_operand:SI 3 "arm_add_operand" "rIL,rIL"))
  			 (match_operand:SI 1 "arm_rhs_operand" "0,?rI")))
     (clobber (reg:CC CC_REGNUM))]
!   "TARGET_ARM"
    "#"
    [(set_attr "conds" "clob")
     (set_attr "length" "8,12")]
--- 7043,7049 ----
  			  (match_operand:SI 3 "arm_add_operand" "rIL,rIL"))
  			 (match_operand:SI 1 "arm_rhs_operand" "0,?rI")))
     (clobber (reg:CC CC_REGNUM))]
!   "TARGET_ARM && !TARGET_IWMMXT"
    "#"
    [(set_attr "conds" "clob")
     (set_attr "length" "8,12")]

[Bug target/11738] ICE "could not split insn" building libstdc++-v3

[steve at chelsio dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11738



------- Additional Comments From steve at chelsio dot com  2003-09-08 01:30 -------
As evidenced by my disappearance for some time, the patch fixes it for me.

[Bug target/11738] ICE "could not split insn" building libstdc++-v3

[pingc at nortelnetworks dot com]

------- Additional Comments From pingc at nortelnetworks dot com  2004-12-08 12:18 -------
hi, additional comments

I encountered with a similar issue like this, my gcc version is 2.95.1 19990816.

It is interesting that when I commented some piece of my code, I could 
successfully compiling my file, so I just wonder whether is this file too large
(68k),but there are some other files are larger than it. 


====================================
atmDebug.cc: In function `void atmPmLogDisplay(unsigned int = 0, short unsigned 
int = 0, short unsigned int = 0)':
atmDebug.cc:2519: Could not split insn
(insn:TI 520 517 521 (parallel[
            (set (reg:CC 71 cr3)
                (compare:CC (sign_extend:SI (reg:HI 0 r0))
                    (const_int 0)))
            (clobber (reg:SI 9 r9))
        ] ) 71 {extendhisi2+2} (insn_list 517 (insn_list 517 (nil)))
    (expr_list:REG_DEAD (reg:HI 0 r0)
        (expr_list:REG_UNUSED (reg:SI 9 r9)
            (nil))))
../../src/gcc/toplev.c:1472: Internal compiler error in function fatal_insn
Please submit a Problem Report to Cygnus Solutions with send-pr.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11738

[Bug target/11738] ICE "could not split insn" building libstdc++-v3

[steven at gcc dot gnu dot org]

------- Comment #10 from steven at gcc dot gnu dot org  2007-02-05 22:23 -------
Reported as fixed, see comment #9.


-- 

steven at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11738

[Bug target/11738] ICE "could not split insn" building libstdc++-v3

[nickc at redhat dot com]

------- Comment #9 from nickc at redhat dot com  2007-02-05 14:28 -------
Hi Steven,

  There is no longer a buf to fix.  In fact the hack mentioned in comment #4
has been removed and the test case compiles without problems using the current
mainline sources.

Cheers
  Nick


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11738

[Bug target/11738] ICE "could not split insn" building libstdc++-v3

[steven at gcc dot gnu dot org]

------- Comment #7 from steven at gcc dot gnu dot org  2007-02-03 16:26 -------
Ping!

Nick, is there still a bug to fix here?  The pattern you hacked in comment #4
is still not fixed AFAICT.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11738

[Bug target/11738] ICE "could not split insn" building libstdc++-v3

[steven at gcc dot gnu dot org]

------- Comment #8 from steven at gcc dot gnu dot org  2007-02-03 16:27 -------
moving to WAITING pending Nick's reply.


-- 

steven at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11738