Avoid genSpill/genReload asserts for VFP spills/reloads with offsets
greater than 1024 from the baseblock pointer.

Also, update comments on the use of r12.



git-svn-id: svn://svn.valgrind.org/vex/trunk@2025 8f6e269a-dfd6-0310-a8e1-e2731360e62c
1 file changed