* Improved handling of TOC pointer spills for indirect calls

* Improve precision of square root reciprocal estimate

* Enabled MachinePipeliner support for P9 with -ppc-enable-pipeliner.

* MMX/SSE/SSE2 intrinsics headers have been ported to PowerPC using Altivec.

* Machine verification failures cleaned, EXPENSIVE_CHECKS will run

MachineVerification by default now.

* PowerPC scheduling enhancements, with customized PPC specific scheduler

strategy.

* Inner most loop now always align to 32 bytes.

* Enhancements of hardware loops interaction with LSR.

* New builtins added, eg: __builtin_setrnd.

* Various codegen improvements for both scalar and vector code

* Various new exploitations and bug fixes, eg: exploited P9 maddld.