Comment 6 for bug 791327

Forgot the configuration:

Configured with: '../../gcc-4.7~/configure' --prefix='/scratch/cbuild/slave/slaves/ursa3/gcc-4.7~svn174795/gcc/default/install' --enable-languages=c,c++,objc,obj-c++,fortran,lto --with-mode=thumb --with-arch=armv7-a --with-tune=cortex-a9 --with-float=softfp --with-fpu=neon
Thread model: posix
gcc version 4.7.0 20110608 (experimental) [trunk revision 174795] (GCC)

michaelh@ursa2:~/linaro/bugs$ as -v
GNU assembler version 2.20.51 (arm-linux-gnueabi) using BFD version (GNU Binutils for Ubuntu) 2.20.51-system.20100908

michaelh@ursa2:~/linaro/bugs$ uname -a
Linux ursa2 2.6.35.3-cbuild2+ #8 SMP Mon Apr 4 12:46:46 NZST 2011 armv7l GNU/Linux

michaelh@ursa2:~/linaro/bugs$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 10.10
Release: 10.10
Codename: maverick

The fault also occurs at -O1 and -O3 but not at -O0.

The assembly in the region is:

.L33:
 movs r1, #0
 movs r2, #64
 mov r0, sp
 mov r9, sp
 bl memset
 cmp r4, #4
 beq .L11
 add r0, r8, r4, lsl #2
 rsb r6, r8, #4
 lsls r6, r6, #2
 rsb r1, r4, #4
 rsb r0, sp, r0, lsl #2
 mov r4, sp
 mov lr, #0

which matches the final lines of the function. It looks like the code should be using r9 instead of sp.