// 2011 Oct 19; Moc OS X 10.7.2
// Apple bug #10311664
// gcc grb.c -O1 -Wall
//#include <stdio.h>
int main(){
double to[5];
double *u = &to[4]; int j = 5;
  while (j-- >= 1) (u--)[0] += 42;
// {int j; for(j=0; j<5; ++j) printf("%e\n", to[j]);}
return to[1];}
// Returns 0; should return 42; witness clang.
/*
(gdb) disass main
Dump of assembler code for function main:
0x0000000100000f00 <main+0>:	push   %rbp
0x0000000100000f01 <main+1>:	mov    %rsp,%rbp
0x0000000100000f04 <main+4>:	movq   $0x0,-0x20(%rbp)
0x0000000100000f0c <main+12>:	mov    $0x50,%eax
0x0000000100000f11 <main+17>:	movsd  0x47(%rip),%xmm0        # 0x100000f60
0x0000000100000f19 <main+25>:	nopl   0x0(%rax)
0x0000000100000f20 <main+32>:	movsd  -0x58(%rbp,%rax,1),%xmm1
0x0000000100000f26 <main+38>:	addsd  %xmm0,%xmm1
0x0000000100000f2a <main+42>:	movsd  %xmm1,-0x58(%rbp,%rax,1)
0x0000000100000f30 <main+48>:	add    $0xfffffffffffffff0,%rax
0x0000000100000f34 <main+52>:	jne    0x100000f20 <main+32>
0x0000000100000f36 <main+54>:	cvttsd2si -0x20(%rbp),%eax
0x0000000100000f3b <main+59>:	pop    %rbp
0x0000000100000f3c <main+60>:	retq   
End of assembler dump.

Note address increment of -16 at 0x100000f30
gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00)
*/