[Bug target/54741] GCC 4.4, 4.5, 4.6 4.7 (probably 4.8) Generates un-usable code on AVX supported CPUs (FreeBSD)

[ace.of.zerosync at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54741

--- Comment #8 from M.S. Babaei <ace.of.zerosync at gmail dot com> 2012-10-02 07:14:32 UTC ---
(In reply to comment #3)
> use disassemble from inside gdb and look for the faulting instruction.

Sorry I'm not very familiar with GDB, but I assume you need this:


(gdb) disassemble main
Dump of assembler code for function main:
0x0000000000400bc4 <main+0>:    push   %rbp
0x0000000000400bc5 <main+1>:    mov    %rsp,%rbp
0x0000000000400bc8 <main+4>:    push   %rbx
0x0000000000400bc9 <main+5>:    sub    $0x48,%rsp
0x0000000000400bcd <main+9>:    lea    -0x13(%rbp),%rax
0x0000000000400bd1 <main+13>:    mov    %rax,%rdi
0x0000000000400bd4 <main+16>:    callq  0x400e7c <_ZNSaISt4pairIKSsSsEEC2Ev>
0x0000000000400bd9 <main+21>:    lea    -0x13(%rbp),%rsi
0x0000000000400bdd <main+25>:    lea    -0x12(%rbp),%rcx
0x0000000000400be1 <main+29>:    lea    -0x11(%rbp),%rdx
0x0000000000400be5 <main+33>:    lea    -0x50(%rbp),%rax
0x0000000000400be9 <main+37>:    mov    %rsi,%r8
0x0000000000400bec <main+40>:    mov    $0xa,%esi
0x0000000000400bf1 <main+45>:    mov    %rax,%rdi
0x0000000000400bf4 <main+48>:    callq  0x400eb0
<_ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEEC2EmRKS1_RKS3_RKS7_>
0x0000000000400bf9 <main+53>:    lea    -0x13(%rbp),%rax
0x0000000000400bfd <main+57>:    mov    %rax,%rdi
0x0000000000400c00 <main+60>:    callq  0x400e96 <_ZNSaISt4pairIKSsSsEED2Ev>
0x0000000000400c05 <main+65>:    mov    $0x4016b2,%esi
0x0000000000400c0a <main+70>:    mov    $0x602c40,%edi
0x0000000000400c0f <main+75>:    callq  0x4009f0 basic_ostreamIcT_ES5_PKc@plt>
0x0000000000400c14 <main+80>:    mov    $0x400a40,%esi
0x0000000000400c19 <main+85>:    mov    %rax,%rdi
0x0000000000400c1c <main+88>:    callq  0x400a20 <_ZNSolsEPFRSoS_E@plt>
0x0000000000400c21 <main+93>:    mov    $0x0,%ebx
0x0000000000400c26 <main+98>:    lea    -0x50(%rbp),%rax
0x0000000000400c2a <main+102>:    mov    %rax,%rdi
0x0000000000400c2d <main+105>:    callq  0x400dba
<_ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEED2Ev>
0x0000000000400c32 <main+110>:    mov    %ebx,%eax
0x0000000000400c34 <main+112>:    add    $0x48,%rsp
0x0000000000400c38 <main+116>:    pop    %rbx
0x0000000000400c39 <main+117>:    pop    %rbp
0x0000000000400c3a <main+118>:    retq   
0x0000000000400c3b <main+119>:    mov    %rax,%rbx
0x0000000000400c3e <main+122>:    lea    -0x13(%rbp),%rax
0x0000000000400c42 <main+126>:    mov    %rax,%rdi
0x0000000000400c45 <main+129>:    callq  0x400e96 <_ZNSaISt4pairIKSsSsEED2Ev>
0x0000000000400c4a <main+134>:    mov    %rbx,%rax
0x0000000000400c4d <main+137>:    mov    %rax,%rdi
0x0000000000400c50 <main+140>:    callq  0x400a80 <_Unwind_Resume@plt>
0x0000000000400c55 <main+145>:    mov    %rax,%rbx
0x0000000000400c58 <main+148>:    lea    -0x50(%rbp),%rax
0x0000000000400c5c <main+152>:    mov    %rax,%rdi
0x0000000000400c5f <main+155>:    callq  0x400dba
<_ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEED2Ev>
0x0000000000400c64 <main+160>:    mov    %rbx,%rax
0x0000000000400c67 <main+163>:    mov    %rax,%rdi
0x0000000000400c6a <main+166>:    callq  0x400a80 <_Unwind_Resume@plt>
End of assembler dump.


If not then tell me the steps and I'll post what you need.