/// holds the virtual register into which the sret argument is passed.
unsigned SRetReturnReg;
- /// GlobalBaseReg - keeps track of the virtual register mapped onto global
- /// base register.
+ /// GlobalBaseReg - keeps track of the virtual register initialized for
+ /// use as the global base register. This is used for PIC in some PIC
+ /// relocation models.
unsigned GlobalBaseReg;
public: