[Bug optimization/14868] New: 3.3/3.4 ICE with -msse -mfpmath=sse -fnon-call-exceptions

[Bug optimization/14868] New: 3.3/3.4 ICE with -msse -mfpmath=sse -fnon-call-exceptions

[nick at ilm dot com]

I originally triggered this compiling on a SL9 opteron, but i was able
to reproduce it on x86 by enabling sse:

> /dept/rnd/vendor/gcc-3.4pre/bin/g++ -fnon-call-exceptions -msse2 -mfpmath=sse
-O -c foo.C
foo.C: In member function `Matrix44<T> Matrix44<T>::gjInverse(bool) const [with
T = double]':
foo.C:161:   instantiated from here
foo.C:158: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

> /dept/rnd/vendor/gcc-3.4pre/bin/g++ -v
Reading specs from
/dept/rnd/vendor/gcc-3.4-20040225/lib/gcc/i686-pc-linux-gnu/3.4.0/specs
Configured with: ../gcc-3.4-20040225/configure
--prefix=/dept/rnd/vendor/gcc-3.4-20040225 --enable-threads --enable-languages=c,c++
Thread model: posix
gcc version 3.4.0 20040225 (prerelease)

my 3.4 build isn't the most up to date, but this also crashes 3.3.2 and 3.3.3.

-nick

-- 
           Summary: 3.3/3.4 ICE with -msse -mfpmath=sse -fnon-call-
                    exceptions
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: nick at ilm 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: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14868

[Bug optimization/14868] 3.3/3.4 ICE with -msse -mfpmath=sse -fnon-call-exceptions

[nick at ilm dot com]

------- Additional Comments From nick at ilm dot com  2004-04-06 18:22 -------
Created an attachment (id=6045)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=6045&action=view)
testcase that triggers the ICE


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14868

[Bug optimization/14868] 3.3/3.4 ICE with -msse2 -mfpmath=sse -fnon-call-exceptions

[nick at ilm dot com]

------- Additional Comments From nick at ilm dot com  2004-04-06 18:23 -------
typo in description -msse -> -msse2

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|3.3/3.4 ICE with -msse -    |3.3/3.4 ICE with -msse2 -
                   |mfpmath=sse -fnon-call-     |mfpmath=sse -fnon-call-
                   |exceptions                  |exceptions


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14868

[Bug optimization/14868] ICE with -msse2 -mfpmath=sse -fnon-call-exceptions

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-04-06 18:30 -------
Confirmed on the mainline:
#0  find_if_block (ce_info=0xbffebc00) at /home/gates/pinskia/src/gnu/gcc/src/gcc/ifcvt.c:1633
#1  0x08451201 in if_convert (x_life_data_ok=0) at /home/gates/pinskia/src/gnu/gcc/src/gcc/ifcvt.c:
2325
#2  0x083e428c in rest_of_compilation (decl=0x40159798) at /home/gates/pinskia/src/gnu/gcc/src/
gcc/passes.c:852
#3  0x084086b7 in tree_rest_of_compilation (fndecl=0x40159798, nested_p=false)
    at /home/gates/pinskia/src/gnu/gcc/src/gcc/tree-optimize.c:202
#4  0x0812c68e in expand_body (fn=0x40159798) at /home/gates/pinskia/src/gnu/gcc/src/gcc/cp/
semantics.c:2928
#5  0x0840ab4e in cgraph_expand_function (node=0x401816c0) at /home/gates/pinskia/src/gnu/
gcc/src/gcc/cgraphunit.c:791
#6  0x0840ac76 in cgraph_assemble_pending_functions () at /home/gates/pinskia/src/gnu/gcc/src/
gcc/cgraphunit.c:287
#7  0x0840b995 in cgraph_finalize_function (decl=0x40159798, nested=false)
    at /home/gates/pinskia/src/gnu/gcc/src/gcc/cgraphunit.c:368
#8  0x0812c9c3 in expand_or_defer_fn (fn=0x40159798) at /home/gates/pinskia/src/gnu/gcc/src/
gcc/cp/semantics.c:3011
#9  0x0809e10e in instantiate_decl (d=0x40159798, defer_ok=0) at /home/gates/pinskia/src/gnu/
gcc/src/gcc/cp/pt.c:11281
#10 0x080a9797 in instantiate_pending_templates () at /home/gates/pinskia/src/gnu/gcc/src/gcc/cp/
pt.c:11358
#11 0x080d804b in finish_file () at /home/gates/pinskia/src/gnu/gcc/src/gcc/cp/decl2.c:2582
#12 0x0817f6b5 in c_common_parse_file (set_yydebug=0) at /home/gates/pinskia/src/gnu/gcc/src/
gcc/c-opts.c:1235
#13 0x083b88ee in toplev_main (argc=48, argv=0xbffec074) at /home/gates/pinskia/src/gnu/gcc/
src/gcc/toplev.c:1575
#14 0x0818319e in main (argc=48, argv=0x30) at /home/gates/pinskia/src/gnu/gcc/src/gcc/main.c:
35

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |ice-on-valid-code
      Known to fail|                            |3.2.3 3.2.2 3.3.3 3.5.0
                   |                            |3.3.1
   Last reconfirmed|0000-00-00 00:00:00         |2004-04-06 18:30:23
               date|                            |
            Summary|3.3/3.4 ICE with -msse2 -   |ICE with -msse2 -mfpmath=sse
                   |mfpmath=sse -fnon-call-     |-fnon-call-exceptions
                   |exceptions                  |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14868

[Bug optimization/14868] ICE with -msse2 -mfpmath=sse -fnon-call-exceptions

[bangerth at dealii dot org]

------- Additional Comments From bangerth at dealii dot org  2004-04-06 20:41 -------
This is the shortest I can come up with: 
--------------- 
void foo () throw (int) 
{ 
  for (int i = 0; i < 3 ; i++) 
    { 
      double tmp; 
      if (tmp < 0) 
        tmp = -tmp; 
    } 
} 
---------------------- 
g/x> /home/bangerth/bin/gcc-3.2.3/bin/c++ -msse -mfpmath=sse 
-fnon-call-exceptions -O -c x.cc 
x.cc: In function `void foo()': 
x.cc:9: internal error: Segmentation fault 
Please submit a full bug report, 
with preprocessed source if appropriate. 
See <URL:http://gcc.gnu.org/bugs.html> for instructions. 
 
g/x> /home/bangerth/bin/gcc-3.3.4-pre/bin/c++ -msse -mfpmath=sse 
-fnon-call-exceptions -O -c x.cc 
x.cc: In function `void foo()': 
x.cc:9: internal compiler error: Segmentation fault 
Please submit a full bug report, 
with preprocessed source if appropriate. 
See <URL:http://gcc.gnu.org/bugs.html> for instructions. 
 
g/x> /home/bangerth/bin/gcc-3.4-pre/bin/c++ -msse -mfpmath=sse 
-fnon-call-exceptions -O -c x.cc 
x.cc: In function `void foo()': 
x.cc:9: internal compiler error: Segmentation fault 
Please submit a full bug report, 
with preprocessed source if appropriate. 
See <URL:http://gcc.gnu.org/bugs.html> for instructions. 
 
g/x> /home/bangerth/bin/gcc-3.5-pre/bin/c++ -msse -mfpmath=sse 
-fnon-call-exceptions -O -c x.cc 
x.cc: In function `void foo()': 
x.cc:9: internal compiler error: Segmentation fault 
Please submit a full bug report, 
with preprocessed source if appropriate. 
See <URL:http://gcc.gnu.org/bugs.html> for instructions. 
 
All *-pre compilers were updated 2004-04-02. 
 
W. 

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|3.2.3 3.2.2 3.3.3 3.5.0     |3.2.3 3.2.2 3.3.3 3.5.0
                   |3.3.1                       |3.3.1 3.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14868

[Bug optimization/14868] ICE with -msse2 -mfpmath=sse -fnon-call-exceptions

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-04-06 21:02 -------
The problem is that if convert is trying to convert
      if (tmp < 0) 
        tmp = -tmp; 
into
   fabs(tmp);
but hitting a NULL pointer.
Note this does not happen on the tree-ssa for some reason.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14868

[Bug rtl-optimization/14868] ICE with -msse2 -mfpmath=sse -fnon-call-exceptions

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-07-06 07:52 -------
Fixed, as I can no longer reproduce this on the mainline.  Most likely the merge of the tree-ssa changed 
the RTL somehow.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |3.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14868

[Bug rtl-optimization/14868] ICE with -msse2 -mfpmath=sse -fnon-call-exceptions

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-02-01 23:45 -------
*** Bug 19744 has been marked as a duplicate of this bug. ***

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14868

[Bug rtl-optimization/14868] ICE with -msse2 -mfpmath=sse -fnon-call-exceptions

[steven at gcc dot gnu dot org]

------- Additional Comments From steven at gcc dot gnu dot org  2005-02-02 00:15 -------
This may be fixed on mainline, but it's still broken in 3.4 and before. 

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14868

[Bug rtl-optimization/14868] ICE with -msse2 -mfpmath=sse -fnon-call-exceptions

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-02-02 01:05 -------
Hmm, the problem is that the earliest compare is not in the same BB as the jump.

The reason why we don't ICE on the mainline is because they are in the same BB (but that might be 
wrong).

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.0.0                       |---


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14868

[Bug rtl-optimization/14868] ICE with -msse2 -mfpmath=sse -fnon-call-exceptions

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-02-02 01:49 -------
Hmm, x86 split the branch by itself.
ix86_split_fp_branch
But we don't recombine the branch again why?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14868

[Bug rtl-optimization/14868] ICE with -msse2 -mfpmath=sse -fnon-call-exceptions

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |NEW


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14868

[Bug rtl-optimization/14868] ICE with -msse2 -mfpmath=sse -fnon-call-exceptions

[nick at ilm dot com]

------- Additional Comments From nick at ilm dot com  2005-04-14 02:15 -------
testcase compiles successfuly with gcc-4.0.0-20050410
on x68 and amd64, removed 4.0.0 from known to fail line.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|3.2.3 3.2.2 3.3.3 4.0.0     |3.2.3 3.2.2 3.3.3 3.3.1
                   |3.3.1 3.4.0                 |3.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14868

[Bug rtl-optimization/14868] [3.4 only] ICE with -msse2 -mfpmath=sse -fnon-call-exceptions

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2004-04-06 18:30:23         |2005-07-14 00:54:22
               date|                            |
            Summary|ICE with -msse2 -mfpmath=sse|[3.4 only] ICE with -msse2 -
                   |-fnon-call-exceptions       |mfpmath=sse -fnon-call-
                   |                            |exceptions
   Target Milestone|---                         |3.4.5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14868