rep-of ( vreg -- rep )
Virtual single-assignment registers

Next:

set-rep-of ( rep vreg -- )

Vocabulary
compiler.cfg.registers

Inputs

vreg

a number

Outputs

rep	a representation

Word description
Gets the representation for a virtual register. This word cannot be called before representation selection has run; use any-rep for ##copy instructions and so on.

Notes

•	Throws bad-vreg if the representation for the vreg isn't known.
•	A virtual register can change representation during its lifetime so this word can't always be used.

Definition

USING: assocs kernel namespaces ;

IN: compiler.cfg.registers

: rep-of ( vreg -- rep )
    representations get ?at [ bad-vreg ] unless ;