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moving towards disabling failing tests on an individual basis
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closes #10705
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check the set of passing tests; move towards the disabling logic being
inside each test rather than which files are included.
this enables a few more passing tests.
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const locals now detect if the value ends up being comptime known. In
such case, it replaces the runtime AIR instructions with a decl_ref
const.
In the backends, some more sophisticated logic for marking decls as
alive was needed to prevent Decls incorrectly being garbage collected
that were indirectly referenced in such manner.
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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.
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Looks like I repeated the same mistake, which last time was addressed in
1e0addcf73ee71d23a41b744995848bcca38e8d3.
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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.
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* Extract common logic between `zirStructInitEmpty` and
`zirStructInit`.
* `resolveTypeFields` additionally sets status to `have_layout` if the
total number of fields is 0.
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This mostly reverts commit 692c254336da71cbe21aaf9fbc21240fd1269b95.
The test "for loop over pointers to struct, getting field from struct
pointer" is still failing on the CI so that one is not moved over.
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This reverts commit 0a9b4d092f58595888f9e4be8ef683b2ed8a0da1.
Hm, these are all passing for me locally. I'll have to do some
troubleshooting to figure out which one(s) are failing on the CI.
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1. Function signatures that return a no member struct return void
2. Undefined var decls don't get a value generated for them
3. Don't generate bitcast code if the result isn't used, since
bitcast is a pure function. Right now struct handling code
generates some weird unused bitcast AIR, and this optimization
side steps that issue.
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