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[Bug middle-end/51784] [4.7 Regression] FAIL: gcc.dg/tree-prof/pr44777.c execution, -fprofile-generate -D_PROFILE_GENERATE
- From: "dominiq at lps dot ens.fr" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 13 Jan 2012 23:46:47 +0000
- Subject: [Bug middle-end/51784] [4.7 Regression] FAIL: gcc.dg/tree-prof/pr44777.c execution, -fprofile-generate -D_PROFILE_GENERATE
- Auto-submitted: auto-generated
- References: <bug-51784-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51784
--- Comment #16 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2012-01-13 23:46:47 UTC ---
> disas x
>
> would be interesting here to find out what insn is at 0x29c0 and what is around
> that.
0x0000291b <+0>: push %ebp
0x0000291c <+1>: mov %esp,%ebp
0x0000291e <+3>: push %edi
0x0000291f <+4>: push %esi
0x00002920 <+5>: push %ebx
0x00002921 <+6>: sub $0x3c,%esp
0x00002924 <+9>: call 0x2660
0x00002929 <+14>: lea -0x18(%ebp),%eax
0x0000292c <+17>: mov %eax,-0x24(%ebp)
0x0000292f <+20>: mov %esp,-0x20(%ebp)
0x00002932 <+23>: lea 0x2833(%ebx),%eax
0x00002938 <+29>: mov (%eax),%eax
0x0000293a <+31>: lea 0x282f(%ebx),%edx
0x00002940 <+37>: mov (%edx),%edx
0x00002942 <+39>: mov %edx,0x10(%esp)
0x00002946 <+43>: lea -0xe(%ebx),%edx
0x0000294c <+49>: mov %edx,0xc(%esp)
0x00002950 <+53>: movl $0x0,0x4(%esp)
0x00002958 <+61>: movl $0x0,0x8(%esp)
0x00002960 <+69>: mov %eax,(%esp)
0x00002963 <+72>: call 0x4420 <__gcov_indirect_call_profiler>
0x00002968 <+77>: lea 0x282f(%ebx),%eax
0x0000296e <+83>: movl $0x0,(%eax)
0x00002974 <+89>: lea 0x2857(%ebx),%eax
0x0000297a <+95>: mov 0x4(%eax),%edx
0x0000297d <+98>: mov (%eax),%eax
0x0000297f <+100>: add $0x1,%eax
0x00002982 <+103>: adc $0x0,%edx
0x00002985 <+106>: lea 0x2857(%ebx),%ecx
0x0000298b <+112>: mov %eax,(%ecx)
0x0000298d <+114>: mov %edx,0x4(%ecx)
0x00002990 <+117>: lea -0x24(%ebp),%eax
0x00002993 <+120>: mov 0x8(%ebp),%edx
0x00002996 <+123>: mov %edx,(%esp)
0x00002999 <+126>: mov %eax,%ecx
0x0000299b <+128>: call 0x283e <y>
0x000029a0 <+133>: jmp 0x29c3 <x+168>
0x000029a2 <+135>: lea 0x18(%ebp),%ebp
=> 0x000029a5 <+138>: lea 0x2857(%ebx),%eax
0x000029ab <+144>: mov 0xc(%eax),%edx
0x000029ae <+147>: mov 0x8(%eax),%eax
0x000029b1 <+150>: add $0x1,%eax
0x000029b4 <+153>: adc $0x0,%edx
0x000029b7 <+156>: lea 0x2857(%ebx),%ecx
0x000029bd <+162>: mov %eax,0x8(%ecx)
0x000029c0 <+165>: mov %edx,0xc(%ecx)
0x000029c3 <+168>: mov 0x8(%ebp),%esi
0x000029c6 <+171>: lea 0x2857(%ebx),%eax
0x000029cc <+177>: mov 0x14(%eax),%edx
0x000029cf <+180>: mov 0x10(%eax),%eax
0x000029d2 <+183>: add $0x1,%eax
0x000029d5 <+186>: adc $0x0,%edx
0x000029d8 <+189>: lea 0x2857(%ebx),%ecx
0x000029de <+195>: mov %eax,0x10(%ecx)
0x000029e1 <+198>: mov %edx,0x14(%ecx)
0x000029e4 <+201>: mov %esi,%eax
0x000029e6 <+203>: add $0x3c,%esp
0x000029e9 <+206>: pop %ebx
0x000029ea <+207>: pop %esi
0x000029eb <+208>: pop %edi
0x000029ec <+209>: pop %ebp
0x000029ed <+210>: ret
and the registers evolution is
(gdb) stepi
0x000029b4 29 y (a);
(gdb) info registers
eax 0xdb52c000 -615333888
ecx 0xbfffd934 -1073751756
edx 0xbfff 49151
ebx 0x284b 10315
esp 0xbfffd910 0xbfffd910
ebp 0xbfffd958 0xbfffd958
esi 0x51a0 20896
edi 0x0 0
eip 0x29b4 0x29b4 <x+153>
eflags 0x396 [ PF AF SF TF IF ]
cs 0x17 23
ss 0xbfffd934 -1073751756
ds 0x1f 31
es 0x1f 31
fs 0x0 0
gs 0x37 55
(gdb) stepi
0x000029b7 29 y (a);
(gdb) info registers
eax 0xdb52c000 -615333888
ecx 0xbfffd934 -1073751756
edx 0xbfff 49151
ebx 0x284b 10315
esp 0xbfffd910 0xbfffd910
ebp 0xbfffd958 0xbfffd958
esi 0x51a0 20896
edi 0x0 0
eip 0x29b7 0x29b7 <x+156>
eflags 0x306 [ PF TF IF ]
cs 0x17 23
ss 0xbfffd934 -1073751756
ds 0x1f 31
es 0x1f 31
fs 0x0 0
gs 0x37 55
(gdb) stepi
0x000029bd 29 y (a);
(gdb) info registers
eax 0xdb52c000 -615333888
ecx 0x50a2 20642
edx 0xbfff 49151
ebx 0x284b 10315
esp 0xbfffd910 0xbfffd910
ebp 0xbfffd958 0xbfffd958
esi 0x51a0 20896
edi 0x0 0
eip 0x29bd 0x29bd <x+162>
eflags 0x306 [ PF TF IF ]
cs 0x17 23
ss 0x50a2 20642
ds 0x1f 31
es 0x1f 31
fs 0x0 0
gs 0x37 55
(gdb) stepi
0x000029c0 29 y (a);
(gdb) info registers
eax 0xdb52c000 -615333888
ecx 0x50a2 20642
edx 0xbfff 49151
ebx 0x284b 10315
esp 0xbfffd910 0xbfffd910
ebp 0xbfffd958 0xbfffd958
esi 0x51a0 20896
edi 0x0 0
eip 0x29c0 0x29c0 <x+165>
eflags 0x306 [ PF TF IF ]
cs 0x17 23
ss 0x50a2 20642
ds 0x1f 31
es 0x1f 31
fs 0x0 0
gs 0x37 55
(gdb) stepi
31 return a;
(gdb) info registers
eax 0xdb52c000 -615333888
ecx 0x50a2 20642
edx 0xbfff 49151
ebx 0x284b 10315
esp 0xbfffd910 0xbfffd910
ebp 0xbfffd958 0xbfffd958
esi 0x51a0 20896
edi 0x0 0
eip 0x29c3 0x29c3 <x+168>
eflags 0x306 [ PF TF IF ]
cs 0x17 23
ss 0x50a2 20642
ds 0x1f 31
es 0x1f 31
fs 0x0 0
gs 0x37 55
(gdb) stepi
0x000029c6 31 return a;
(gdb) info registers
eax 0xdb52c000 -615333888
ecx 0x50a2 20642
edx 0xbfff 49151
ebx 0x284b 10315
esp 0xbfffd910 0xbfffd910
ebp 0xbfffd958 0xbfffd958
esi 0x1 1
edi 0x0 0
eip 0x29c6 0x29c6 <x+171>
eflags 0x306 [ PF TF IF ]
cs 0x17 23
ss 0x50a2 20642
ds 0x1f 31
es 0x1f 31
fs 0x0 0
gs 0x37 55