Disable STFLE check when running native sim
Adding non-destructive 32-bit Shift instructions
PERF: Exploit full memory reference in DoStoreKeyedFastElement()'s load
PERF: Exploit non-destructive 31-bit shift instructions.

Clean up MacroAssembler shift macros
Fix regexp ShiftRightArith break, and exploit more Shift macros
PERF: Reg assignment improvement in DoMulI passing to TestInt32
Exploit CompareRX instructions for CompareRoot
Remap CmpP of RootMemOperands to use CompareRoot macro
Exploit CompareRoot in builtins
Misc cleanup in lithium-codegen
Improve ExtractBitRange to use ShiftRight macros and common 31/64 paths
More CompareRoot exploitation
Final set of CompareRoot changes
Add detection of General Instructions Extension facility and RISBG assembler support
Fix stack checking issue. Update caller frame offset to be kCalleeRegisterSaveAreaSize