[Bug c++/13229] New: Odd combination of optimizations causes ICE in double complex loop

[Bug c++/13229] New: Odd combination of optimizations causes ICE in double complex loop

[coyote at coyotegulch dot com]

The following was discovered by my automated Acovea testing facility.

An ICE occurs when compiling the attached C++ file with the following command
line and gcc 3.4 20031126:

g++ -c -O1 -fno-loop-optimize -fgcse -funit-at-a-time gcc-ice1.cpp

This is a very obscure error, given that no one is likely to intentionally
combine the above options. However, it is an ICE, and may be related to other
problems in the compiler.

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           Summary: Odd combination of optimizations causes ICE in double
                    complex loop
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: coyote at coyotegulch dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux
  GCC host triplet: i686-pc-linux
GCC target triplet: i686-pc-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13229

[Bug c++/13229] Odd combination of optimizations causes ICE in double complex loop

[coyote at coyotegulch dot com]

------- Additional Comments From coyote at coyotegulch dot com  2003-11-29 04:47 -------
Created an attachment (id=5229)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=5229&action=view)
Small example that generates the ICE


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13229

[Bug optimization/13229] Odd combination of optimizations causes ICE in double complex loop

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c++                         |optimization
           Keywords|                            |ice-on-valid-code


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13229

[Bug optimization/13229] Odd combination of optimizations causes ICE in double complex loop

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2003-11-29 06:06 -------
Confirmed on the mainline (20031108) on powerpc-apple-darwin.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|minor                       |normal
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2003-11-29 06:06:23
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13229

[Bug optimization/13229] Odd combination of optimizations causes ICE in double complex loop

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2003-11-29 06:07 -------
(gdb) bt
#0  0x001c1ddc in init_alias_analysis () at /Volumes/UFS_Partition/pinskia/src/fsf/gcc-clean/src/
gcc/alias.c:2842
#1  0x00227a44 in bypass_jumps (file=0x0) at /Volumes/UFS_Partition/pinskia/src/fsf/gcc-clean/
src/gcc/gcse.c:7970
#2  0x0015cf80 in rest_of_handle_jump_bypass (decl=0x13ed700, insns=0x13e4a20) at /
Volumes/UFS_Partition/pinskia/src/fsf/gcc-clean/src/gcc/toplev.c:2590
#3  0x0015ec70 in rest_of_compilation (decl=0x13ed700) at /Volumes/UFS_Partition/pinskia/src/
fsf/gcc-clean/src/gcc/toplev.c:3366
#4  0x00293d5c in tree_rest_of_compilation (fndecl=0x13ed700, nested_p=false) at /Volumes/
UFS_Partition/pinskia/src/fsf/gcc-clean/src/gcc/tree-optimize.c:168
#5  0x000c62a8 in expand_body (fn=0x13ed700) at /Volumes/UFS_Partition/pinskia/src/fsf/gcc-
clean/src/gcc/cp/semantics.c:2884
#6  0x0027e46c in cgraph_expand_function (node=0x13f2150) at /Volumes/UFS_Partition/
pinskia/src/fsf/gcc-clean/src/gcc/cgraphunit.c:499
#7  0x00280d74 in cgraph_expand_all_functions () at /Volumes/UFS_Partition/pinskia/src/fsf/gcc-
clean/src/gcc/cgraphunit.c:1332
#8  0x00281058 in cgraph_optimize () at /Volumes/UFS_Partition/pinskia/src/fsf/gcc-clean/src/
gcc/cgraphunit.c:1396
#9  0x00071548 in finish_file () at /Volumes/UFS_Partition/pinskia/src/fsf/gcc-clean/src/gcc/cp/
decl2.c:2868
#10 0x0011ba20 in c_common_parse_file (set_yydebug=0) at /Volumes/UFS_Partition/pinskia/src/
fsf/gcc-clean/src/gcc/c-opts.c:1233
#11 0x0015b5f0 in compile_file () at /Volumes/UFS_Partition/pinskia/src/fsf/gcc-clean/src/gcc/
toplev.c:1836
#12 0x00161e7c in do_compile () at /Volumes/UFS_Partition/pinskia/src/fsf/gcc-clean/src/gcc/
toplev.c:4691
#13 0x00161f60 in toplev_main (argc=20, argv=0xbffffb60) at /Volumes/UFS_Partition/pinskia/
src/fsf/gcc-clean/src/gcc/toplev.c:4731
#14 0x0012157c in main (argc=20, argv=0xbffffb60) at /Volumes/UFS_Partition/pinskia/src/fsf/
gcc-clean/src/gcc/main.c:35

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13229

[Bug optimization/13229] Odd combination of optimizations causes ICE in double complex loop

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2003-11-29 18:50 -------
*** Bug 13233 has been marked as a duplicate of this bug. ***

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13229

[Bug optimization/13229] Odd combination of optimizations causes ICE in double complex loop

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2003-12-01 02:55 -------
This is a dup of bug 12628.

*** This bug has been marked as a duplicate of 12628 ***

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13229