http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52411
--- Comment #7 from evrinoma at gmail dot com 2012-02-29 12:53:01 UTC --- gdb) disassemble 0x000000000053e800,+32 Dump of assembler code from 0x53e800 to 0x53e820: 0x000000000053e800 <tzload+3040>: movdqu -0x40(%rcx),%xmm0 0x000000000053e805 <tzload+3045>: prefetcht0 0x190(%rcx) 0x000000000053e80c <tzload+3052>: mov %rcx,%r10 => 0x000000000053e80f <tzload+3055>: prefetchw 0x1d0(%rdi) 0x000000000053e816 <tzload+3062>: add $0x4,%esi 0x000000000053e819 <tzload+3065>: movaps %xmm0,(%rdi) 0x000000000053e81c <tzload+3068>: movdqu -0x30(%rcx),%xmm0 End of assembler dump. (gdb)