[Bug bootstrap/36169] New: [4.4 Regression] gcc/fortran/simplify.c:3956: internal compiler error: in gen_reg_rtx, at emit-rtl.c:868

[Bug bootstrap/36169] New: [4.4 Regression] gcc/fortran/simplify.c:3956: internal compiler error: in gen_reg_rtx, at emit-rtl.c:868

[dominiq at lps dot ens dot fr]

Gcc revision 135041 failed to bootstrap at:

...
/opt/gcc/i686-darwin/./prev-gcc/xgcc -B/opt/gcc/i686-darwin/./prev-gcc/
-B/opt/gcc/gcc4.4w/i686-apple-darwin9/bin/ -c  -g -O2 -fomit-frame-pointer
-DIN_GCC   -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -Wmissing-format-attribute -pedantic -Wno-long-long
-Wno-variadic-macros                                     
-Wno-overlength-strings -Werror -fno-common  -DHAVE_CONFIG_H -I. -Ifortran
-I../../gcc-4.4-work/gcc -I../../gcc-4.4-work/gcc/fortran
-I../../gcc-4.4-work/gcc/../include -I./../intl
-I../../gcc-4.4-work/gcc/../libcpp/include -I/sw/include 
-I../../gcc-4.4-work/gcc/../libdecnumber
-I../../gcc-4.4-work/gcc/../libdecnumber/dpd -I../libdecnumber 
../../gcc-4.4-work/gcc/fortran/simplify.c -o fortran/simplify.o
../../gcc-4.4-work/gcc/fortran/simplify.c: In function
'gfc_simplify_set_exponent':
../../gcc-4.4-work/gcc/fortran/simplify.c:3956: internal compiler error: in
gen_reg_rtx, at emit-rtl.c:868
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[3]: *** [fortran/simplify.o] Error 1
make[3]: *** Waiting for unfinished jobs....
rm gcj-dbtool.pod fsf-funding.pod jcf-dump.pod jv-convert.pod grmic.pod
gcov.pod gcj.pod gc-analyze.pod gfdl.pod cpp.pod gij.pod gfortran.pod gcc.pod
make[2]: *** [all-stage2-gcc] Error 2
make[1]: *** [stage2-bubble] Error 2
make: *** [all] Error 2

Last successful bootstrap at rev. 135023, last successful update rev. 135039.


-- 
           Summary: [4.4 Regression] gcc/fortran/simplify.c:3956: internal
                    compiler error: in gen_reg_rtx, at emit-rtl.c:868
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dominiq at lps dot ens dot fr
 GCC build triplet: i686-apple-darwin9
  GCC host triplet: i686-apple-darwin9
GCC target triplet: i686-apple-darwin9


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36169

[Bug bootstrap/36169] [4.4 Regression] gcc/fortran/simplify.c:3956: internal compiler error: in gen_reg_rtx, at emit-rtl.c:868

[ubizjak at gmail dot com]

------- Comment #1 from ubizjak at gmail dot com  2008-05-07 16:39 -------
Hm... strange, because my patch changed x86 target specific MMX and SSE vector
builtins only. I don't see any __builtin_X usage in gfc_simplify_set_exponent
that would trigger codepaths that were changed.

Can you do a backtrace of the failure?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36169

[Bug bootstrap/36169] [4.4 Regression] gcc/fortran/simplify.c:3956: internal compiler error: in gen_reg_rtx, at emit-rtl.c:868

[dominiq at lps dot ens dot fr]

------- Comment #2 from dominiq at lps dot ens dot fr  2008-05-07 17:06 -------
> Can you do a backtrace of the failure?

I tried, but my knowledge of gdb is too limited. I get the error, but backtrace
gives "no stack".


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36169

[Bug bootstrap/36169] [4.4 Regression] gcc/fortran/simplify.c:3956: internal compiler error: in gen_reg_rtx, at emit-rtl.c:868

[ubizjak at gmail dot com]

------- Comment #3 from ubizjak at gmail dot com  2008-05-07 18:08 -------
Created an attachment (id=15610)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15610&action=view)
P

Can you try attached patch that fixes some patterns only at expand time? 


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36169

[Bug bootstrap/36169] [4.4 Regression] gcc/fortran/simplify.c:3956: internal compiler error: in gen_reg_rtx, at emit-rtl.c:868

[ubizjak at gmail dot com]

------- Comment #4 from ubizjak at gmail dot com  2008-05-07 18:32 -------
I see the problem:

define_insn_and_split "*fixuns_trunc<mode>_1" is a post-reload splitter that
calls  ix86_split_convert_uns_si_sse after reload. There we have:

 gen_sse2_loadlpd (value, CONST0_RTX (V2DFmode), input)

and this calls sse2_loadlpd expander that wants to fixup its operands by
forcing something in a register.

Posted patch will fix the failure.


-- 

ubizjak at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |ubizjak at gmail dot com
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-05-07 18:32:07
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36169

[Bug bootstrap/36169] [4.4 Regression] gcc/fortran/simplify.c:3956: internal compiler error: in gen_reg_rtx, at emit-rtl.c:868

[hjl dot tools at gmail dot com]

------- Comment #5 from hjl dot tools at gmail dot com  2008-05-07 19:04 -------
This may be related to PR 36174.


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
OtherBugsDependingO|                            |36174
              nThis|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36169

[Bug bootstrap/36169] [4.4 Regression] gcc/fortran/simplify.c:3956: internal compiler error: in gen_reg_rtx, at emit-rtl.c:868

[ubizjak at gmail dot com]

------- Comment #6 from ubizjak at gmail dot com  2008-05-07 19:11 -------
Should be fixed now.

Sorry for the breakage, I didn't notice one postreload usage of loadlpd.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36169

[Bug bootstrap/36169] [4.4 Regression] gcc/fortran/simplify.c:3956: internal compiler error: in gen_reg_rtx, at emit-rtl.c:868

[dominiq at lps dot ens dot fr]

------- Comment #7 from dominiq at lps dot ens dot fr  2008-05-07 19:54 -------
> Should be fixed now.

I am now at stage 3, so it seems fixed.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36169

[Bug bootstrap/36169] [4.4 Regression] gcc/fortran/simplify.c:3956: internal compiler error: in gen_reg_rtx, at emit-rtl.c:868

[ubizjak at gmail dot com]

------- Comment #8 from ubizjak at gmail dot com  2008-05-08 06:56 -------
Fixed.


-- 

ubizjak at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36169