// 2011 Oct 22; Moc OS X 10.7.2
// Apple bug #10311664
// gcc a.c -O1 -Wall
#include <stdio.h>
int main(){
double to[5];
double *u = &to[4]; int j = 5; to[0]=0;
while (j-- >= 1) (u--)[0] += 42; // Increase each element of array.
{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:
...
0x0000000100000ed0 <main+32>:	movsd  -0x68(%rbp,%rax,1),%xmm1
0x0000000100000ed6 <main+38>:	addsd  %xmm0,%xmm1
0x0000000100000eda <main+42>:	movsd  %xmm1,-0x68(%rbp,%rax,1)
0x0000000100000ee0 <main+48>:	add    $0xfffffffffffffff0,%rax
0x0000000100000ee4 <main+52>:	jne    0x100000ed0 <main+32>
...
End of assembler dump.

Note address increment of -16 at 0x100000ee0
gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.1.00)
*/