zig/test/cases/compile_errors
mlugg add2976a9b
compiler: implement better shuffle AIR
Runtime `@shuffle` has two cases which backends generally want to handle
differently for efficiency:

* One runtime vector operand; some result elements may be comptime-known
* Two runtime vector operands; some result elements may be undefined

The latter case happens if both vectors given to `@shuffle` are
runtime-known and they are both used (i.e. the mask refers to them).
Otherwise, if the result is not entirely comptime-known, we are in the
former case. `Sema` now diffentiates these two cases in the AIR so that
backends can easily handle them however they want to. Note that this
*doesn't* really involve Sema doing any more work than it would
otherwise need to, so there's not really a negative here!

Most existing backends have their lowerings for `@shuffle` migrated in
this commit. The LLVM backend uses new lowerings suggested by Jacob as
ones which it will handle effectively. The x86_64 backend has not yet
been migrated; for now there's a panic in there. Jacob will implement
that before this is merged anywhere.
2025-06-01 08:24:01 +01:00
..
2025-02-03 09:14:37 +00:00
2024-07-31 16:57:42 -07:00
2025-01-29 06:35:22 +00:00
2025-01-29 06:35:22 +00:00