The @ptrCast(X, @alignCast(@alignOf(T), Y)) pattern is only correct if T
is not a function type or a pointer, in that case the @alignOf refers to
the pointer itself and not to the pointee type.
The code would previously assume every function would start at addresses
being multiples of 16, this is not true beside some specific cases.
Moreover LLVM picks different alignment values depending on whether it's
trying to generate dense or fast code.
Let's use the minimum guaranteed alignment as base value, computed
according to how big the opcodes are.
The alignment of function pointers is always 1, a safe value that won't
cause any error at runtime. Note that this was already the case before
this commit, here we're making this choice explicit.
Let the 'alignment' field for TypeInfo of fn types reflect the ABI
alignment used by the compiler, make this field behave similarly to the
'alignment' one for pointers.
Kick-start initial work on new cross-platform abstraction for
sockets. Adds a test for read timeouts and a test for creating
a non-blocking socket pair on Linux.
The new Socket abstraction is barebones and is made to support both
blocking and non-blocking abstractions, alongside different socket
protocols and domains.
Support for platform-dependant socket options that handles unsupported
platforms gracefully via. comptime checks is provided for the new Socket
abstraction.
This also marks the first out of many commits for introducing breaking
changes to the standard library in a separate `x` folder, which was
pre-approved by @andrewrk.
The intent for the new `x` package is to introduce new async, event loop,
networking, and operating system abstractions that would require breaking
the standard library significantly. By having the `x` package, code in the
standard library and compiler may then slowly be refactored to use the `x`
package. Once modules in the `x` package are stabilized, they can be moved
out of the `x` package, and a global 'grep' can be done to update import
paths that resolve to the stabilized module in the `x` package.
Notably this exposed an issue with the language having to do with the
secret safety tag on untagged unions. How can we have our cake and eat
it too? Not solved in this commit. I will file a language proposal to
tackle this issue soon.
Fixes a compile error in `std.fs.File.readvAll`.
Instead of having one function per precedence level, mirroring the BNF grammar,
this uses the "precedence climbing" algorithm with a table of operator
precedences (and a few special cases that don't fit into the table as it is).
This is a first pass -- it's probably possible to put more of the parser
into this form, e.g. to support prefix/suffix operators with precedence, if
necessary, or just to simplify the code more.
It may also be possible to speed this up by putting more useful information
into the tokens during tokenization, to avoid the extra branch on the token in
operInfo.
When trying to retrieve 80bit fp values from clang using
getValueAsApproximateDouble we'd eventually hit the ceiling value and
return infinity, an invalid value for a fp literal.
Add some logic to prevent this error and warn the user.
Closes#8602
Inside a nosuspend block, emit function calls as nosuspend calls.
Also inside a comptime block, emit function calls as comptime calls.
Also emit `async foo()` calls as async calls.
Remove compile error for `nosuspend` block inside `suspend` block.
Instead of implicitly treating every `suspend` block also as a
`nosuspend` block (which would make sense), we leave suspension points
as compile errors, to hint to the programmer about accidents. Of course
they may then assert `nosuspend` by introducing a block within their
suspend block.
To make room in `Zir.Inst.Tag` I moved `typeof_peer` and `compile_log`
to `Extended`.
* AstGen: implement `anyframe_literal` and `anyframe_type`.
* Introduce `makeSubBlock` to avoid redundant AstGen code for GenZir
scopes. Allows adding/removing a field without possibility of
accidentally introducing a bug of forgetting to set the new field.
* Add to GenZir `nosuspend_node` and `suspend_node` in preparation for
implementing `suspend` blocks and `nosuspend` blocks.
* AstGen: fix assembly to support clobbers, multiple outputs, and
outputs without `->` syntax.
- `asm` and `asm_volatile` move to `Extended` enum with `small` being
repurposed for a few things. This frees up 2 ZIR tags, 1 of which
is used in this commit and 1 is leftover.
* AstGen: fix `simple_types` incorrectly having multiple conflicting
values for "undefined" and "null".
- Also add "anyframe" to `simple_types`.
* Add `anyframe_type` to type.zig, value.zig and `Zir.Inst.Ref`.
- Also add i128 and u128 types to `Zir.Inst.Ref` and `simple_types`.
* Sema/Zir: Fix incorrect math causing the function body to be messed
up for Extended-encoded functions.
* Zir: support `i32` fields for "extra" payloads.
