[Bug c/24445] New: "unable to find a register to spill in class 'R0_REGS"

[Bug c/24445] New: "unable to find a register to spill in class 'R0_REGS"

[rpjday at mindspring dot com]

trying to build a cross-compile toolchain using "crosstool" with the following
properties:

BINUTILS_DIR=binutils-2.16.1
GCC_DIR=gcc-4.1-20051015
GLIBC_DIR=glibc-2.3.5
LINUX_SANITIZED_HEADER_DIR=linux-libc-headers-2.6.12.0
GLIBCTHREADS_FILENAME=glibc-linuxthreads-2.3.5

TARGET=sh4-unknown-linux-gnu
TARGET_CFLAGS="-O -m4 -ml"
GLIBC_CONFIGPARMS="no-z-defs=yes"
GLIBC_EXTRA_CONFIG="--without-fp"
USE_SYSROOT=1

  eventually, trying to compile glibc-2.3.5:

sh4-unknown-linux-gnu-gcc  ../sysdeps/generic/strtok.c -c -std=gnu99 -O -Wall
-Winline -Wstrict-prototypes -Wwrite-strings -m4 -ml   -fPIC    -I../include
-I.
-I/home/rpjday/ct/crosstool-0.38.new/build/sh4-unknown-linux-gnu/gcc-4.1-20051015-glibc-2.3.5/build-glibc/string
-I.. -I../libio 
-I/home/rpjday/ct/crosstool-0.38.new/build/sh4-unknown-linux-gnu/gcc-4.1-20051015-glibc-2.3.5/build-glibc
-I../sysdeps/sh/elf -I../linuxthreads/sysdeps/unix/sysv/linux/sh
-I../linuxthreads/sysdeps/unix/sysv/linux -I../linuxthreads/sysdeps/pthread
-I../sysdeps/pthread -I../linuxthreads/sysdeps/unix/sysv
-I../linuxthreads/sysdeps/unix -I../linuxthreads/sysdeps/sh
-I../sysdeps/unix/sysv/linux/sh/sh4 -I../sysdeps/unix/sysv/linux/sh
-I../sysdeps/unix/sysv/linux -I../sysdeps/gnu -I../sysdeps/unix/common
-I../sysdeps/unix/mman -I../sysdeps/unix/inet -I../sysdeps/unix/sysv
-I../sysdeps/unix/sh -I../sysdeps/unix -I../sysdeps/posix -I../sysdeps/sh/sh4
-I../sysdeps/sh -I../sysdeps/wordsize-32 -I../sysdeps/ieee754/flt-32
-I../sysdeps/ieee754/dbl-64 -I../sysdeps/ieee754 -I../sysdeps/generic/elf
-I../sysdeps/generic -nostdinc -isystem
/home/rpjday/ct/crosstool-0.38.new/build/sh4-unknown-linux-gnu/gcc-4.1-20051015-glibc-2.3.5/gcc-core-prefix/lib/gcc/sh4-unknown-linux-gnu/4.1.0/include
-isystem /home/rpjday/ct/sh4/sh4-unknown-linux-gnu/sys-root/usr/include
-D_LIBC_REENTRANT -include ../include/libc-symbols.h  -DPIC -DSHARED     -o
/home/rpjday/ct/crosstool-0.38.new/build/sh4-unknown-linux-gnu/gcc-4.1-20051015-glibc-2.3.5/build-glibc/string/strtok.os
-MD -MP -MF
/home/rpjday/ct/crosstool-0.38.new/build/sh4-unknown-linux-gnu/gcc-4.1-20051015-glibc-2.3.5/build-glibc/string/strtok.os.dt
-MT
/home/rpjday/ct/crosstool-0.38.new/build/sh4-unknown-linux-gnu/gcc-4.1-20051015-glibc-2.3.5/build-glibc/string/strtok.os
../sysdeps/generic/strtok.c: In function 'strtok':
../sysdeps/generic/strtok.c:66: error: unable to find a register to spill in
class 'R0_REGS'
../sysdeps/generic/strtok.c:66: error: this is the insn:
(insn 68 112 69 5 (set (mem/c/i:SI (plus:SI (reg:SI 12 r12)
                (reg/f:SI 1 r1 [177])) [0 olds+0 S4 A32])
        (reg:SI 0 r0)) 172 {movsi_ie} (insn_list:REG_DEP_TRUE 62
(insn_list:REG_DEP_TRUE 67 (nil)))
    (expr_list:REG_DEAD (reg:SI 0 r0)
        (expr_list:REG_DEAD (reg/f:SI 1 r1 [177])
            (nil))))
../sysdeps/generic/strtok.c:66: internal compiler error: in spill_failure, at
reload1.c:1890
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
make[2]: ***
[/home/rpjday/ct/crosstool-0.38.new/build/sh4-unknown-linux-gnu/gcc-4.1-20051015-glibc-2.3.5/build-glibc/string/strtok.os]
Error 1
make[2]: Leaving directory
`/home/rpjday/ct/crosstool-0.38.new/build/sh4-unknown-linux-gnu/gcc-4.1-20051015-glibc-2.3.5/glibc-2.3.5/string'
make[1]: *** [string/subdir_lib] Error 2
make[1]: Leaving directory
`/home/rpjday/ct/crosstool-0.38.new/build/sh4-unknown-linux-gnu/gcc-4.1-20051015-glibc-2.3.5/glibc-2.3.5'
make: *** [lib] Error 2


-- 
           Summary: "unable to find a register to spill in class 'R0_REGS"
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rpjday at mindspring dot com
  GCC host triplet: i686-pc-linux
GCC target triplet: sh4-unknown-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24445

[Bug target/24445] "unable to find a register to spill in class 'R0_REGS"

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2005-10-19 19:07 -------
I think a work around for this problem was committed on the 17th which is after
the snapshot was done, Can you confirm that?

If you do, please mark this as a dup of bug 22553.

Thanks,
Andrew Pinski


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24445

[Bug target/24445] "unable to find a register to spill in class 'R0_REGS"

[rpjday at mindspring dot com]

------- Comment #2 from rpjday at mindspring dot com  2005-10-19 19:09 -------
Created an attachment (id=10026)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=10026&action=view)
compressed strtok.i file from running the single offending
sh4-unknown-linux-gnu-gcc command


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24445

[Bug target/24445] "unable to find a register to spill in class 'R0_REGS"

[rpjday at mindspring dot com]

------- Comment #3 from rpjday at mindspring dot com  2005-10-19 19:54 -------
Using a CVS pull as of today didn't seem to solve the problem.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24445

[Bug target/24445] "unable to find a register to spill in class 'R0_REGS"

[kkojima at gcc dot gnu dot org]

------- Comment #4 from kkojima at gcc dot gnu dot org  2005-10-20 12:11 -------
Here is a reduced testcase:

extern int bar (void) __attribute__ ((__pure__));
extern char *baz;
void foo (void)
{
  baz = (char *) bar ();
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24445

[Bug target/24445] "unable to find a register to spill in class 'R0_REGS"

[sieb at sscd dot de]

------- Comment #5 from sieb at sscd dot de  2005-10-20 12:14 -------
(In reply to comment #1)
> I think a work around for this problem was committed on the 17th which is after
> the snapshot was done, Can you confirm that?
>

I just tried cvs head (as of 2005-10-20 12:10 GMT). Same problem,
unfortunately.

Regards,
  Alexander


-- 

sieb at sscd dot de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sieb at sscd dot de


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24445

[Bug target/24445] "unable to find a register to spill in class 'R0_REGS"

[rpjday at mindspring dot com]

------- Comment #6 from rpjday at mindspring dot com  2005-10-20 12:45 -------
(In reply to comment #4)
> Here is a reduced testcase:
> 
> extern int bar (void) __attribute__ ((__pure__));
> extern char *baz;
> void foo (void)
> {
>   baz = (char *) bar ();
> }
> 

OK, given the reduced test case that shows the problem, I assume there's no
need to provide any further details from the crosstool output then?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24445

[Bug target/24445] "unable to find a register to spill in class 'R0_REGS"

[rpjday at mindspring dot com]

------- Comment #7 from rpjday at mindspring dot com  2005-10-21 14:15 -------
  In case anyone is interested, this error appeared between gcc-4.1 snapshots
20050917 and 20050924.  gcc-4.1-20050917 built a toolchain without incident.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24445

[Bug target/24445] "unable to find a register to spill in class 'R0_REGS"

[rpjday at mindspring dot com]

------- Comment #8 from rpjday at mindspring dot com  2005-10-22 21:36 -------
Just now tested with new snapshot gcc-4.1-20051022, same result.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24445

[Bug target/24445] "unable to find a register to spill in class 'R0_REGS"

[rpjday at mindspring dot com]

------- Comment #9 from rpjday at mindspring dot com  2005-10-30 09:56 -------
The latest snapshot of gcc-4.1-20051029 still produces the same error at the
same location.  Was there a workaround posted somewhere, or is this still an
unresolved issue?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24445

[Bug target/24445] "unable to find a register to spill in class 'R0_REGS"

[kkojima at gcc dot gnu dot org]

------- Comment #10 from kkojima at gcc dot gnu dot org  2005-11-01 23:55 -------
With binary search, I've found that the failure started after the patch:

2005-09-18  Jan Hubicka  <jh@suse.cz>

        * calls.c (flags_from_decl_or_type): Do not set ECF_LIBCALL_BLOCK.

http://gcc.gnu.org/viewcvs/trunk/gcc/calls.c?r1=103656&r2=104405


-- 

kkojima at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kkojima at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24445

[Bug target/24445] [4.1 Regression] "unable to find a register to spill in class 'R0_REGS"

[pinskia at gcc dot gnu dot org]

------- Comment #11 from pinskia at gcc dot gnu dot org  2005-11-01 23:58 -------
(In reply to comment #10)
> With binary search, I've found that the failure started after the patch:

That would mean it was a latent bug.

Confirmed.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |ice-on-valid-code
           Priority|P2                          |P3
   Last reconfirmed|0000-00-00 00:00:00         |2005-11-01 23:58:43
               date|                            |
            Summary|"unable to find a register  |[4.1 Regression] "unable to
                   |to spill in class 'R0_REGS" |find a register to spill in
                   |                            |class 'R0_REGS"
   Target Milestone|---                         |4.1.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24445

[Bug target/24445] [4.1 Regression] "unable to find a register to spill in class 'R0_REGS"

[mmitchel at gcc dot gnu dot org]

------- Comment #12 from mmitchel at gcc dot gnu dot org  2005-11-03 06:39 -------
Downgrading to P5; SH is not a primary or secondary target.


-- 

mmitchel at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24445

[Bug target/24445] [4.1 Regression] "unable to find a register to spill in class 'R0_REGS"

[kkojima at gcc dot gnu dot org]

------- Comment #13 from kkojima at gcc dot gnu dot org  2005-11-11 02:12 -------
Subject: Bug 24445

Author: kkojima
Date: Fri Nov 11 02:12:42 2005
New Revision: 106774

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=106774
Log:
        PR target/24445
        * calls.c (expand_call): Copy a return value to a plain register
        if needed.

        * gcc.dg/pr24445.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/pr24445.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/calls.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24445

[Bug target/24445] [4.1 Regression] "unable to find a register to spill in class 'R0_REGS"

[pinskia at gcc dot gnu dot org]

------- Comment #14 from pinskia at gcc dot gnu dot org  2005-11-11 17:43 -------
Fixed.


-- 

pinskia at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24445