[Bug rtl-optimization/42489] New: Function call never happened after compile with -foptimize-sibling-calls

[Bug rtl-optimization/42489] New: Function call never happened after compile with -foptimize-sibling-calls

[t66667 at gmail dot com]

In function __xmlRaiseError of error.c ( libxml2.a ) if this particular c file
is compiled with optimization -O2 ( -foptimize-sibling-calls ) call to this
function from xmlFatalErrMsgStrIntStr() parser.c ( libxml2.a ) will never take
place, and, seems to cause dead-lock situation.
Tested recompile this c file with, -fno-optimize-sibling-calls, confirm to
workaround the bug.


-- 
           Summary: Function call never happened after compile with -
                    foptimize-sibling-calls
           Product: gcc
           Version: 4.4.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: t66667 at gmail dot com
 GCC build triplet: x86_64-slackware-linux
  GCC host triplet: x86_64-slackware-linux
GCC target triplet: x86_64-w64-mingw32


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42489

[Bug rtl-optimization/42489] Function call never happened after compile with -foptimize-sibling-calls

[t66667 at gmail dot com]

------- Comment #1 from t66667 at gmail dot com  2009-12-24 11:44 -------
Created an attachment (id=19386)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19386&action=view)
saves .ok compiled with  -fno-optimize-sibling-calls


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42489

[Bug rtl-optimization/42489] Function call never happened after compile with -foptimize-sibling-calls

[t66667 at gmail dot com]

------- Comment #2 from t66667 at gmail dot com  2009-12-24 11:57 -------
(gdb) disass $pc-30 $pc+30
Dump of assembler code from 0x4933e3 to 0x49341f:
0x004933e3 <__xmlRaiseError+179>:       add    %al,(%eax)
0x004933e5 <__xmlRaiseError+181>:       add    %al,%bh
0x004933e7 <__xmlRaiseError+183>:       add    $0x24,%al
0x004933e9 <__xmlRaiseError+185>:       xchg   %eax,%esi
0x004933ea <__xmlRaiseError+186>:       add    %al,(%eax)
0x004933ec <__xmlRaiseError+188>:       add    %cl,0x15ff0076(%ebp)
0x004933f2 <__xmlRaiseError+194>:       movsb  %ds:(%esi),%es:(%edi)
0x004933f3 <__xmlRaiseError+195>:       inc    %ecx
0x004933f4 <__xmlRaiseError+196>:       dec    %esp
0x004933f5 <__xmlRaiseError+197>:       add    %al,-0x1fba7640(%ebp)
0x004933fb <__xmlRaiseError+203>:       je     0x4934d0 <__xmlRaiseError+416>
0x00493401 <__xmlRaiseError+209>:       jmp    0x493401 <__xmlRaiseError+209>
0x00493403 <__xmlRaiseError+211>:       cmpl   $0x0,0xc(%ebp)
0x00493407 <__xmlRaiseError+215>:       je     0x49346f <__xmlRaiseError+319>
0x00493409 <__xmlRaiseError+217>:       cmpl   $0x493220,0xc(%ebp)
0x00493410 <__xmlRaiseError+224>:       je     0x49366c <__xmlRaiseError+828>
0x00493416 <__xmlRaiseError+230>:       cmpl   $0x493130,0xc(%ebp)
0x0049341d <__xmlRaiseError+237>:       je     0x49366c <__xmlRaiseError+828>
End of assembler dump.
(gdb) info all-registers
eax            0xa07308 10515208
ecx            0x77633b23       2002991907
edx            0xa07303 10515203
ebx            0x4f97c4 5216196
esp            0x28ec10 0x28ec10
ebp            0x28ec48 0x28ec48
esi            0xa02ac0 10496704
edi            0x1      1
eip            0x493401 0x493401 <__xmlRaiseError+209>
eflags         0x202    [ IF ]
cs             0x23     35
ss             0x2b     43
ds             0x2b     43
es             0x2b     43
fs             0x53     83
gs             0x2b     43
st0            0        (raw 0x00000000000000000000)
st1            0        (raw 0x00000000000000000000)
st2            0        (raw 0x00000000000000000000)
st3            0        (raw 0x00000000000000000000)
st4            0        (raw 0x00000000000000000000)
st5            0        (raw 0x00000000000000000000)
st6            0        (raw 0x00000000000000000000)
st7            -0       (raw 0x80000000000000000000)
fctrl          0x37f    895
fstat          0x4000   16384
ftag           0xffff   65535
fiseg          0xf800   63488
fioff          0x288ce52        42520146
foseg          0xfa80   64128
fooff          0x759c060        123322464
fop            0x0      0
xmm0           {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
  v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
  uint128 = 0x00000000000000000000000000000000}
xmm1           {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
  v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
  uint128 = 0x00000000000000000000000000000000}
xmm2           {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
  v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
  uint128 = 0x00000000000000000000000000000000}
xmm3           {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
  v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
  uint128 = 0x00000000000000000000000000000000}
xmm4           {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
  v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
  uint128 = 0x00000000000000000000000000000000}
xmm5           {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
  v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
  uint128 = 0x00000000000000000000000000000000}
xmm6           {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
  v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
  uint128 = 0x00000000000000000000000000000000}
xmm7           {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
  v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0,
    0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
  uint128 = 0x00000000000000000000000000000000}
mxcsr          0x1f80   [ IM DM ZM OM UM PM ]
mm0            {uint64 = 0x0, v2_int32 = {0x0, 0x0}, v4_int16 = {0x0, 0x0,
    0x0, 0x0}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}
mm1            {uint64 = 0x0, v2_int32 = {0x0, 0x0}, v4_int16 = {0x0, 0x0,
    0x0, 0x0}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}
mm2            {uint64 = 0x0, v2_int32 = {0x0, 0x0}, v4_int16 = {0x0, 0x0,
    0x0, 0x0}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}
mm3            {uint64 = 0x0, v2_int32 = {0x0, 0x0}, v4_int16 = {0x0, 0x0,
    0x0, 0x0}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}
mm4            {uint64 = 0x0, v2_int32 = {0x0, 0x0}, v4_int16 = {0x0, 0x0,
    0x0, 0x0}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}
mm5            {uint64 = 0x0, v2_int32 = {0x0, 0x0}, v4_int16 = {0x0, 0x0,
    0x0, 0x0}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}
mm6            {uint64 = 0x0, v2_int32 = {0x0, 0x0}, v4_int16 = {0x0, 0x0,
    0x0, 0x0}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}
mm7            {uint64 = 0x0, v2_int32 = {0x0, 0x0}, v4_int16 = {0x0, 0x0,
    0x0, 0x0}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}
(gdb) bt
#0  0x00493401 in __xmlRaiseError ()
#1  0x0044ac53 in xmlFatalErrMsgStrIntStr ()
#2  0x00452529 in xmlParseEndTag2 ()
#3  0x00458d7a in xmlParseElement ()
#4  0x004590da in xmlParseContent ()
#5  0x00458c94 in xmlParseElement ()
#6  0x0045f532 in xmlParseDocument ()
#7  0x0045f7f3 in xmlDoRead ()
#8  0x00404624 in parseAndPrintFile ()
#9  0x0040715d in main ()
(gdb)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42489

[Bug rtl-optimization/42489] Function call never happened after compile with -foptimize-sibling-calls

[d dot g dot gorbachev at gmail dot com]

------- Comment #3 from d dot g dot gorbachev at gmail dot com  2009-12-24 21:25 -------
Some issues with -foptimize-sibling-calls were fixed in GCC 4.5


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42489

[Bug rtl-optimization/42489] Function call never happened after compile with -foptimize-sibling-calls

[t66667 at gmail dot com]

------- Comment #4 from t66667 at gmail dot com  2009-12-24 21:29 -------
(In reply to comment #3)
> Some issues with -foptimize-sibling-calls were fixed in GCC 4.5
> 

Backport it to 4.4 branch?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42489

[Bug rtl-optimization/42489] Function call never happened after compile with -foptimize-sibling-calls

[t66667 at gmail dot com]

------- Comment #5 from t66667 at gmail dot com  2009-12-24 22:09 -------
(In reply to comment #3)
> Some issues with -foptimize-sibling-calls were fixed in GCC 4.5
> 

Which revision fix in trunk??


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42489

[Bug rtl-optimization/42489] Function call never happened after compile with -foptimize-sibling-calls

[t66667 at gmail dot com]

------- Comment #6 from t66667 at gmail dot com  2009-12-24 22:44 -------
Cause endless maximum cpu usage in application run-time.


-- 

t66667 at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |major


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42489

[Bug rtl-optimization/42489] Function call never happened after compile with -foptimize-sibling-calls

[paolo dot carlini at oracle dot com]

-- 

paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|major                       |normal


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42489

[Bug rtl-optimization/42489] Opt bug -foptimize-sibling-calls function call stalled! dead-lock, cpu max

[t66667 at gmail dot com]

------- Comment #7 from t66667 at gmail dot com  2009-12-25 02:46 -------
(In reply to comment #3)
> Some issues with -foptimize-sibling-calls were fixed in GCC 4.5
> 
False.
Browsed all recently committed gcc svn change-logs saw no
-foptimize-sibling-calls related fixes.
Updated gcc-trunk svn, compiled gcc-trunk.
Tested
gcc version 4.5.0 20091224 (experimental) Revision 155461 MINGW64-1684
Referential numerous bug-reports:
* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41424
* http://sourceforge.net/projects/mingw-w64/forums/forum/723797/topic/3482477
Very mingw-w64 specific I think.


-- 

t66667 at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |4.4.3 4.5.0
            Summary|Function call never happened|Opt bug -foptimize-sibling-
                   |after compile with -        |calls function call stalled!
                   |foptimize-sibling-calls     |dead-lock, cpu max
            Version|4.4.3                       |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42489

[Bug rtl-optimization/42489] Opt bug -foptimize-sibling-calls function call stalled! dead-lock, cpu max

[t66667 at gmail dot com]

------- Comment #8 from t66667 at gmail dot com  2009-12-25 02:51 -------
No simple test-case code can be provided you have to read libxml2 source
error.c about less then 1000 lines.
Without running program in the gdb, fprintf to stderr in the beginning of the
__xmlRaiseError() there was no output, ran in gdb there was output and
dead-lock cpu running 100% & it contributes to global warming.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42489

[Bug rtl-optimization/42489] Opt bug -foptimize-sibling-calls function call stalled! dead-lock, cpu max

[t66667 at gmail dot com]

------- Comment #9 from t66667 at gmail dot com  2009-12-25 09:18 -------
Most unfortunate the gcc-4.* built with crt and win32api from
http://sf.net/projects/mingw do not suffer from this bug. Therefore specific to
target i686/x86_64-w64-mingw32 http://sourceforge.net/projects/mingw-w64 only.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42489

[Bug rtl-optimization/42489] Opt bug -foptimize-sibling-calls function call stalled! dead-lock, cpu max

[d dot g dot gorbachev at gmail dot com]

------- Comment #10 from d dot g dot gorbachev at gmail dot com  2009-12-25 13:34 -------
> No simple test-case code can be provided you have to read
> libxml2 source error.c about less then 1000 lines.

Could you please provide the preprocessed source file, as described here:
<http://gcc.gnu.org/bugs/> ?

> Browsed all recently committed gcc svn change-logs saw no
> -foptimize-sibling-calls related fixes.

Which of course does not mean that there were no such fixes.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42489

[Bug rtl-optimization/42489] Opt bug -foptimize-sibling-calls function call stalled! dead-lock, cpu max

[t66667 at gmail dot com]

------- Comment #11 from t66667 at gmail dot com  2010-01-05 11:14 -------
nothing to do with gcc


-- 

t66667 at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42489