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Author SHA1 Message Date
Richard Smith e4528b8abb Add infrastructure for distinguishing between signed and unsigned integer types. (#3822) 
Because we don't have any unsigned integer types yet, this is mostly a
no-op change, except that we now format negative values in SemIR
properly.
 2024-03-27 20:18:25 +00:00
Richard SmithandJon Ross-Perkins ebbc648342 Add builtins for some basic integer operations. (#3816) 
Supports unary `-`, and binary `+`, `-`, `*`, `/`, `%`, `==`, `!=`.

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Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
 2024-03-27 00:15:52 +00:00
Richard Smith 3763d0130a Convert literals to i32 when forming an i32-typed int_literal instruction. (#3814) 
This is temporary: eventually per the design we should be forming
integer literals whose types reflect their values. But for now we should
ensure that values fit within their types.

This also fixes canonicalization of integer constants and hence of array
types, because we no longer have multiple different representations of
each `i32` value depending on the bit-width used for the literal.
 2024-03-26 19:56:11 +00:00