[Bug c/17692] New: gcc -O hangs on glnxa64

[Bug c/17692] New: gcc -O hangs on glnxa64

[fsmith at mathworks dot com]

Not sure how to fill this out.  Not sure what Host triplet, Target triplet, 
and Build triplet should be exactly.  I have enclosed the information below 
from the run, and assume I will be given a chance to attach a file on the next 
screen.

This code is auto-generated and unfortunately quite large.  I wasn't able to 
prune it down.

% gcc -v -save-temps -c -O gcc_glnxa64_hang.c
Reading specs from /usr/lib64/gcc-lib/x86_64-suse-linux/3.3.1/specs
Configured with: ../configure --enable-threads=posix --prefix=/usr --with-
local-prefix=/usr/local --infodir=/usr/share/info --mandir=/usr/share/man --
libdir=/usr/lib64 --enable-languages=c,c++,f77,objc,java,ada --disable-
checking --enable-libgcj --with-gxx-include-dir=/usr/include/g++ --with-
slibdir=/lib64 --with-system-zlib --enable-shared --enable-__cxa_atexit x86_64-
suse-linux
Thread model: posix
gcc version 3.3.1 (SuSE Linux)
 /usr/lib64/gcc-lib/x86_64-suse-linux/3.3.1/cc1 -E -quiet -v -D__GNUC__=3 -
D__GNUC_MINOR__=3 -D__GNUC_PATCHLEVEL__=1 gcc_glnxa64_hang.c -O 
gcc_glnxa64_hang.i
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /usr/lib64/gcc-lib/x86_64-suse-linux/3.3.1/include
 /usr/x86_64-suse-linux/include
 /usr/include
End of search list.
 /usr/lib64/gcc-lib/x86_64-suse-linux/3.3.1/cc1 -fpreprocessed 
gcc_glnxa64_hang.i -quiet -dumpbase gcc_glnxa64_hang.c -auxbase 
gcc_glnxa64_hang -O -version -o gcc_glnxa64_hang.s
GNU C version 3.3.1 (SuSE Linux) (x86_64-suse-linux)
        compiled by GNU C version 3.3.1 (SuSE Linux).
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072

-- 
           Summary: gcc -O hangs on glnxa64
           Product: gcc
           Version: 3.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: fsmith at mathworks dot com
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug c/17692] gcc -O hangs on glnxa64

[fsmith at mathworks dot com]

------- Additional Comments From fsmith at mathworks dot com  2004-09-27 14:12 -------
Created an attachment (id=7225)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7225&action=view)
Self-contained C file reproducing the example.


Despite the extension this file has already been pre-processed.  I just undid
the standard library pre-processing under the assumption that these are not the
issue.	

Comments in the file give the exact command-line to run.  It is just
   gcc -O gcc_glnxa64_hang.c

If you really want the *.i file let me know and I will attach it.

fsmith@mathworks.com


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug c/17692] gcc -O hangs on glnxa64

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-09-27 14:15 -------
First the compiler you are using comes from SUSE, report this bug to them first.
Second you should try a new compiler, SUSE does have newer compilers.
Thrid, try a FSF compiler like 3.4.2.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
 GCC target triplet|                            |x86_64-suse-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug c/17692] gcc -O hangs on glnxa64

[bangerth at dealii dot org]

------- Additional Comments From bangerth at dealii dot org  2004-09-27 14:35 -------
As mentioned in the report, I can verify that it doesn't hang on x86 
linux. Someone with an x86_64 box will have to check again. 
 
W. 

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug rtl-optimization/17692] gcc -O hangs on glnxa64

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c                           |rtl-optimization


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug rtl-optimization/17692] gcc -O hangs on glnxa64

[fsmith at mathworks dot com]

------- Additional Comments From fsmith at mathworks dot com  2004-10-01 16:53 -------
Created an attachment (id=7256)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7256&action=view)
A smaller version of the previous file that isolates the problem.


I have now tried this test with gcc 3.3.3 (on a64) and the file still hangs.

Now that the example has been isolated, it appears that gcc's compile time is
exponential in the number of assignments in the included program.

See the comments in the attached source file for more details.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug rtl-optimization/17692] gcc -O hangs on glnxa64

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-10-01 16:57 -------
I would again try a 3.4.x based compiler.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |compile-time-hog


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug rtl-optimization/17692] gcc -O hangs on glnxa64

[fsmith at mathworks dot com]

------- Additional Comments From fsmith at mathworks dot com  2004-10-01 17:20 -------

I would like to try a 3.4.x compiler but I am not sure what I need to do to 
download it and install it.  It will easily take me a couple of days to get 
through this process.  If someone already has a 3.4.x compiler installed it 
will take approximately 5 minutes to determine whether or not this bug is 
reproducible.

When our organization moves on to 3.4.x I will try this code again.  
Unfortunately that won't happen for at least 6 months.

-Fred

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug rtl-optimization/17692] gcc -O hangs on glnxa64

[gnu at the-meissners dot org]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 1198 bytes --]


------- Additional Comments From gnu at the-meissners dot org  2005-07-06 20:59 -------
3.4.4 compiles the file fine on a machine with 2 gigabytes of local memory.  It
may be that the machine you were using is thrashing itself to death.

4.0.0 and 4.0.1-20050702 both give the following error:
gcc_glnxa64_hang.c: In function â:
gcc_glnxa64_hang.c:164: error: could not split insn
(insn:TI 676 664 759 (parallel [
            (set (reg:DF 21 xmm0 [orig:59 t2$1 ] [59])
                (if_then_else:DF (ungt:DF (reg:DF 21 xmm0 [orig:59 t2$1 ] [59])
                        (reg:DF 21 xmm0 [orig:58 t2$0 ] [58]))
                    (reg:DF 21 xmm0 [orig:59 t2$1 ] [59])
                    (reg:DF 21 xmm0 [orig:58 t2$0 ] [58])))
            (clobber (reg:V2DF 22 xmm1))
        ]) 662 {*movdfcc_1_sse} (nil)
    (expr_list:REG_UNUSED (reg:V2DF 22 xmm1)
        (nil)))
gcc_glnxa64_hang.c:164: internal compiler error: in final_scan_insn, at final.c:2508
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

It is fixed on the mainline (checked on July 6th).

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug rtl-optimization/17692] gcc -O hangs on glnxa64

[gnu at the-meissners dot org]

------- Additional Comments From gnu at the-meissners dot org  2005-07-06 21:46 -------
I compiled the sample on 3.3.6, and it did appear to hang.  The memory usage
wasn't that much, so it doesn't look like page faulting itself to death.  The
last phase that dumps its output with -da is 18.life, and 19.combine is empty.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug rtl-optimization/17692] [4.0/4.1? Regression] gcc -O hangs on glnxa64

[giovannibajo at libero dot it]

------- Additional Comments From giovannibajo at libero dot it  2005-07-07 00:20 -------
Thus, we have a regression in 4.0. The regression does not show in 4.1, but 
it's unclear whether it was fixed or it is just hidden by the different code 
produced with the new tree passes.

The compile-time-hog with 3.3 does not matter at this point, as 3.3 is 
unsupported.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|compile-time-hog            |ice-on-valid-code
      Known to fail|                            |4.0.1
      Known to work|                            |3.4.4
   Last reconfirmed|0000-00-00 00:00:00         |2005-07-07 00:20:28
               date|                            |
            Summary|gcc -O hangs on glnxa64     |[4.0/4.1? Regression] gcc -O
                   |                            |hangs on glnxa64
   Target Milestone|---                         |4.0.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug rtl-optimization/17692] [4.0/4.1? Regression] gcc -O hangs on glnxa64

[mmitchel at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.0.1                       |4.0.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug target/17692] [4.0/4.1? Regression] gcc -O hangs on glnxa64

[rth at gcc dot gnu dot org]

------- Additional Comments From rth at gcc dot gnu dot org  2005-07-28 17:16 -------
I expect a could-not-split error to be a target bug, not rtl-opt.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |rth at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
          Component|rtl-optimization            |target
   Last reconfirmed|2005-07-07 00:20:28         |2005-07-28 17:16:37
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug target/17692] [4.0/4.1? Regression] gcc -O hangs on glnxa64

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-07-28 20:51 -------
Subject: Bug 17692

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	rth@gcc.gnu.org	2005-07-28 20:51:19

Modified files:
	gcc            : ChangeLog 
Added files:
	gcc/testsuite/gcc.target/i386: pr17692.c 

Log message:
	PR target/17692
	* config/i386/i386.c (ix86_split_sse_movcc): Emit DELETED note
	when expanding to nothing.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9585&r2=2.9586
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.target/i386/pr17692.c.diff?cvsroot=gcc&r1=NONE&r2=1.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug target/17692] [4.0/4.1? Regression] gcc -O hangs on glnxa64

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-07-28 20:53 -------
Subject: Bug 17692

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-4_0-branch
Changes by:	rth@gcc.gnu.org	2005-07-28 20:53:19

Modified files:
	gcc            : ChangeLog 
	gcc/config/i386: i386.c 
Added files:
	gcc/testsuite/gcc.target/i386: pr17692.c 

Log message:
	PR target/17692
	* config/i386/i386.c (ix86_split_sse_movcc): Emit DELETED note
	when expanding to nothing.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=2.7592.2.335&r2=2.7592.2.336
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/i386/i386.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.795.6.9&r2=1.795.6.10
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.target/i386/pr17692.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=NONE&r2=1.1.2.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug target/17692] [4.0/4.1? Regression] gcc -O hangs on glnxa64

[rth at gcc dot gnu dot org]

------- Additional Comments From rth at gcc dot gnu dot org  2005-07-28 20:55 -------
*** Bug 22462 has been marked as a duplicate of this bug. ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |simonjcan at yahoo dot co
                   |                            |dot uk


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692

[Bug target/17692] [4.0/4.1? Regression] ICE splitting sse conditional move

[rth at gcc dot gnu dot org]

------- Additional Comments From rth at gcc dot gnu dot org  2005-07-28 20:56 -------
Fixed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
            Summary|[4.0/4.1? Regression] gcc -O|[4.0/4.1? Regression] ICE
                   |hangs on glnxa64            |splitting sse conditional
                   |                            |move


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17692