* remove false positive "all prongs handled" compile error for
non-exhaustive enums.
* implement `@TypeInfo` for enums, except enums which have any
declarations is still TODO.
* `getBuiltin` uses nomespaceLookup/analyzeDeclVal rather than
namespaceLookupRef/analyzeLoad. Avoids a detour through an
unnecessary type, and adds a detour through a caching mechanism.
* `Value.eql`: add missing code to handle enum comparisons for
non-exhaustive enums. It works by converting the enum tags to numeric
values and comparing those.
- abs can only overflow, if a == MIN
- comparing the sign change from wrapping addition is branchless
- tests: MIN, MIN+1,..MIN+4, -42, -7, -1, 0, 1, 7..
See #1290
Layout algorithm: all `align(0)` fields are squished together as if they
were a single integer with a number of bits equal to `@bitSizeOf` each
field added together. Then the natural ABI alignment of that integer is
used for that pseudo-field.
Previously, this function would return an incorrect result for structs
and unions which did not have their fields resolved yet.
This required introducing more logic in Sema to resolve types before
doing certain things such as creating an anonmyous Decl and emitting
function call AIR.
As a result a couple more struct tests pass.
Oh, and I implemented the language change to make sizeOf for pointers
always return pointer size bytes even if the element type is 0 bits.
The linker will now emit names for all function, global and data segment symbols.
This increases the ability to debug wasm modules tremendously as tools like wasm2wat
can use this information to generate named functions, globals etc, rather than placeholders such as $f1.
This way I am hopeful they can be reused for every MIR lowering
function which follows a given encoding. Currently, support MI,
RM and MR encodings without SIB scaling.
Instead of a separate function, `coerceNum` for handling comptime-known
number coercion, outside of the main switch, the `coerce` function now
has a single big switch statement that decides the control flow based on
the zig type tag.
* Extract common logic between `zirStructInitEmpty` and
`zirStructInit`.
* `resolveTypeFields` additionally sets status to `have_layout` if the
total number of fields is 0.
Allocate a new program header and a new section to accomodate the read-only data
section ".rodata".
Separate TextBlock into multiple TextBlockList, to separate decl in different
sections.
If a Decl is not a function, it is added to the .rodata section.
While this is technically incorrect, proper handling of anyopaque, as well
as regular opaque, is probably best left until pointers to zero-sized types
having no bits is abolished.
