[Bug middle-end/49378] [4.7 Regression] C++ is broken

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49378

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> 2011-06-12 13:36:39 
UTC ---
On x86-64, I got

000000000006d270 <_ZN12_GLOBAL__N_121system_error_categoryD0Ev>:
   6d270:       48 8d 05 79 d4 27 00    lea    0x27d479(%rip),%rax        #
2ea6f0 <_ZTVN12_GLOBAL__N_121system_error_categoryE+0x10>
   6d277:       53                      push   %rbx
   6d278:       48 89 fb                mov    %rdi,%rbx
   6d27b:       48 89 07                mov    %rax,(%rdi)
   6d27e:       e8 55 a0 fe ff          callq  572d8
<_ZNSt14error_categoryD2Ev@plt>
   6d283:       48 89 df                mov    %rbx,%rdi
   6d286:       5b                      pop    %rbx
   6d287:       e9 2c 9d fe ff          jmpq   56fb8 <_ZdlPv@plt>
   6d28c:       90                      nop
   6d28d:       90                      nop
   6d28e:       90                      nop
   6d28f:       90                      nop

RAX is also uninitialized.