This implements improvements/fixes to get all the union, tuple, and array behavior tests passing.
Previously, we lowered parent pointers for field_ptr and element_ptr incompletely. This has now
been improved to recursively lower such pointer.
Also a fix was done to `generateSymbol` when checking a container's layout.
Previously it was assumed to always be a struct. However, the type can also be a tuple, and therefore
panicking. Updating to ask a type's container layout instead allows us to keep a singular branch for both cases.
Example scenario:
test {
const a: i32 = blk: {
if (false) break :blk 24;
};
_ = a;
}
Prior to this, this would panic the compiler with a source needed error.
This provides the source as `sema.src`. This is not ideal, since the
line it points to is pretty far from the true issue. (One block out)
But, this prevents the compiler from straight up crashing and follows a
pattern used by similar ZIR which don't provide a src loc.
This function took a parameter that was only ever used with one value,
obscuring the fact that it was a regular `block` which should be used with
`.break` and not `.break_inline`.
* make it always return a fully qualified name. stage1 is inconsistent
about this.
* AstGen: fix anon_name_strategy to correctly be `func` when anon type
creation happens in the operand of the return expression.
* Sema: implement type names for the "function" naming strategy.
* Put "enum", "union", "opaque", or "struct" in place of "anon" when
creating respective anonymous Decl names.
* std.testing: add `expectStringStartsWith`. Didn't end up using it
after all.
Also this enables the real test runner for stage2 LLVM backend (sans
wasm32) since it works now.
Instead of doing it before the switch tower, do it afterwards, so that
special handling may be done before undefined gets casted to the
destination type.
In this case the special handling we want to do is *[N]T to []T setting
the slice length based on the array length, even when the array value is
undefined.
When a generic call evaluates to a generic type, the call will be re-generated.
However, the old function was not freed before being re-generated, causing a memory leak.
So rather than only returning an error, we first free the old value.
Notably, Value.eql and Value.hash are improved to treat NaN as equal to
itself, so that Type/Value can be hash map keys. Likewise float hashing
normalizes the float value before computing the hash.
When the length is comptime-known, we perform an inline loop instead of emitting
a runtime loop into the binary.
This also allows us to easily write 'undefined' to aggregate types.
We now do this when we set the error tag of an error union where the payload will be set to undefined.
This implements the `memcpy` instruction and also updates the inline memcpy calls
to make use of the same implementation. We use the fast-loop when the length is comptime known,
and use a runtime loop when the length is runtime known.
We also perform feature-dection to emit a simply wasm memory.copy instruction when the feature
'bulk-memory' is enabled. (off by default).
This reverts commit 8e7b1a74ac4568a2b806026f210ae59e52d2768d.
Sorry, I should have put up a PR and ran that one by Jakub and done some
more inspection.
This causes problems with gdb:
BFD: /home/andy/dev/zig/build-release/test: invalid string offset 3254779904 >= 153524 for section `.shstrtab'
