reg_pref Struct Reference

Data Fields
char	prefclass
char	altclass
char	allocnoclass

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Detailed Description

Structure used to record preferences of given pseudo.

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Field Documentation

char reg_pref::allocnoclass

allocnoclass is a register class that IRA uses for allocating the pseudo.

char reg_pref::altclass

altclass is a register class that we should use for allocating pseudo if no register in the preferred class is available. If no register in this class is available, memory is preferred.

It might appear to be more general to have a bitmask of classes here, but since it is recommended that there be a class corresponding to the union of most major pair of classes, that generality is not required.

char reg_pref::prefclass

(enum reg_class) prefclass is the preferred class. May be NO_REGS if no class is better than memory.

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The documentation for this struct was generated from the following file:

• reginfo.c