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• Vl-expr-p
• Expression-sizing

Welltyped

Expressions whose sizes and types are sensible.

We say expressions are well-typed when their signs and widths have been computed, and when certain consistency requirements are met. This is a rather elaborate consistency check we use as a basic correctness property of our expression-sizing transformation. It may also be useful in later transformations to insist that the you are working with reasonably sane expressions.

Every atom in the expression must satisfy vl-atom-welltyped-p.

Every nonatom has certain consistency checks that depend upon which operator is being applied. For instance, in an expression like a + b, we require that the final width/type of the expression agrees exactly with the final widths/types of a and b. As another example, we insist that the finalwidth/type of &foo is one-bit unsigned, but otherwise we only require that the width of foo itself is non-zero.

Subtopics

Vl-atom-welltyped-p

(vl-atom-welltyped-p x) determines if an atomic expression is well-typed.

Vl-selexpr-welltyped-p

Vl-expr-welltyped-p

Check that an expression is welltyped