Add algebraic simplifications for Iop_And64 (same as for Iop_And32).
Remove isOnesU32 which is no longer needed.


git-svn-id: svn://svn.valgrind.org/vex/trunk@2746 8f6e269a-dfd6-0310-a8e1-e2731360e62c
Add an optimisation for Iop_Left64.


git-svn-id: svn://svn.valgrind.org/vex/trunk@2747 8f6e269a-dfd6-0310-a8e1-e2731360e62c
Comment-only change.


git-svn-id: svn://svn.valgrind.org/vex/trunk@2748 8f6e269a-dfd6-0310-a8e1-e2731360e62c
mips32/mips64: Fix the problem with lwl and lwr for mips32 and mips64.

This patch is fixing the problem with lwl and lwr for mips32 and mips64
that was discovered while running v8 tests for mips32.


git-svn-id: svn://svn.valgrind.org/vex/trunk@2749 8f6e269a-dfd6-0310-a8e1-e2731360e62c