[Bug c/25742] New: Internal compiler error in gen_rtx_SUBREG

[Bug c/25742] New: Internal compiler error in gen_rtx_SUBREG

[zer0 at droids-corp dot org]

The attached code generates an internal error when we try to compile it with
-O[123s].


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           Summary: Internal compiler error in gen_rtx_SUBREG
           Product: gcc
           Version: 3.4.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: zer0 at droids-corp dot org
 GCC build triplet: i386-linux
  GCC host triplet: i386-linux
GCC target triplet: avr


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25742

[Bug c/25742] Internal compiler error in gen_rtx_SUBREG

[zer0 at droids-corp dot org]

------- Comment #1 from zer0 at droids-corp dot org  2006-01-10 21:04 -------
Created an attachment (id=10609)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=10609&action=view)
the guilty program

This is the program that we cannot compile :

$ avr-gcc -Wall -Os f32.c -c -mmcu=atmega128
f32.c: In function `f':
f32.c:71: warning: 'a' might be used uninitialized in this function
f32.c:71: warning: 'b' might be used uninitialized in this function
f32.c:73: internal compiler error: in gen_rtx_SUBREG, at emit-rtl.c:618
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

avr-gcc -v
Reading specs from /usr/lib/gcc/avr/3.4.3/specs
Configured with: ./configure -v --enable-languages=c,c++ --prefix=/usr
--infodir=/usr/share/info --mandir=/usr/share/man --enable-shared
--with-system-zlib --enable-long-long --enable-nls --without-included-gettext
--disable-checking --build=i386-linux --host=i386-linux --target=avr
Thread model: single
gcc version 3.4.3

Note that it compiles on my host :

$ gcc f32.c -c -Os
  -> ok
$ gcc-3.4 f32.c -c -Os
  -> ok


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25742

[Bug c/25742] Internal compiler error in gen_rtx_SUBREG

[berndtrog at yahoo dot com]

------- Comment #2 from berndtrog at yahoo dot com  2006-01-10 21:19 -------
f32.c compiles OK on 4_1-branch and HEAD.


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berndtrog at yahoo dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |berndtrog at yahoo dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25742

[Bug rtl-optimization/25742] Internal compiler error in gen_rtx_SUBREG

[bl at rosetechnology dot dk]

------- Comment #3 from bl at rosetechnology dot dk  2006-01-19 08:52 -------
Created an attachment (id=10673)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=10673&action=view)
Another example, this time on windows-xp

I think this is the same bug.
Compiler version 3.4.3 Windows
Target avr mega64


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25742

[Bug rtl-optimization/25742] Internal compiler error in gen_rtx_SUBREG

[eweddington at cso dot atmel dot com]

------- Comment #4 from eweddington at cso dot atmel dot com  2007-05-30 22:18 -------
f32.c succeeds for
4.1.2, -O[0123s]
4.2.0, -O[0123s]
4.3-20070525, -O[0123s]

Lowering priority.


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eweddington at cso dot atmel dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |4.1.2 4.2.0
           Priority|P3                          |P4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25742

[Bug rtl-optimization/25742] Internal compiler error in gen_rtx_SUBREG

[pinskia at gcc dot gnu dot org]

------- Comment #5 from pinskia at gcc dot gnu dot org  2007-05-31 01:52 -------
Can someone send me the backtrace for 3.4.x? (I think I am fixing the same bug
for the spu-elf target also).


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25742

[Bug rtl-optimization/25742] Internal compiler error in gen_rtx_SUBREG

[abnikant dot singh at atmel dot com]

------- Comment #6 from abnikant dot singh at atmel dot com  2009-08-30 02:02 -------
f32.c succeeds for
4.3.2, -O[0123s]
4.4.0, -O[0123s]


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25742

[Bug rtl-optimization/25742] Internal compiler error in gen_rtx_SUBREG

[eric dot weddington at atmel dot com]

------- Comment #7 from eric dot weddington at atmel dot com  2009-08-31 16:55 -------
Closing bug as WORKSFORME, as it now know to work on four different release
branches of version 4.


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eric dot weddington at atmel dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
      Known to work|4.1.2 4.2.0                 |4.1.2 4.2.0 4.3.2 4.4.0
         Resolution|                            |WORKSFORME


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25742