Bug 1010775 part 1 - Pass Register by value instead of const-ref. r=sunfish
Bug 1010775 part 2 - Pass Imm32 by value instead of const-ref. r=sunfish
Bug 1010775 part 3 - Pass ImmWord by value instead of const-ref. r=sunfish
Bug 1010775 part 4 - Pass ImmPtr by value instead of const-ref. r=sunfish
Bug 1010775 part 5 - Pass ImmGCPtr and ImmMaybeNurseryPtr by value instead of const-ref. r=sunfish
Bug 1010775 part 6 - Pass AbsoluteAddress and PatchedAbsoluteAddress by value instead of const-ref. r=sunfish
Bug 1010775 part 7 - Pass AsmJSAbsoluteAddress and AsmJSImmPtr by value instead of const-ref. r=sunfish
Bug 1010775 part 8 - Pass FloatRegister by value instead of const-ref. r=sunfish