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see #17381
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The previous code incorrectly added `sub_path` twice.
Also for the compilation unit, it was passing empty string to realpath,
resulting in the error handling codepath being used.
closes #17482
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codegen/llvm: truncate padding bits when loading a non-byte-sized value
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Finish the work started in 4c4fb839972f66f55aa44fc0aca5f80b0608c731.
Now the compiler compiles again.
Wire up dependency tree fetching code in the CLI for `zig build`.
Everything is hooked up except for `createDependenciesModule` is not yet
implemented.
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for wasm, as a heuritic, only enable truncation for values smaller than 32bits.
-> the bug is no longer triggered in most use cases (or at least the test suite...)
as for powerpc, adding a redundant `and mask` produces working code.
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This hashmap value used to be assigned much later during `flushModule`,
which never happens if an error is returned by the backend, and
attempting to the undefined values would cause a crash.
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Introduce the new mechanism needed to render anonymous decls to C code
that the frontend is now using.
The current strategy is to collect the set of used anonymous decls into
one ArrayHashMap for the entire compilation, and then render them during
flush().
In the future this may need to be adjusted for incremental compilation
purposes, so that removing a Decl from decl_table means that newly
unused anonymous decls are no longer rendered. However, let's do one
thing at a time. The only goal of this branch is to stop using
Module.Decl objects for unnamed constants.
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Start keeping track of dependencies on anon decls for dependency
ordering during flush()
Currently this causes use of undefined symbols because these
dependencies need to get rendered into the output.
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Instead of explicitly creating a `Module.Decl` object for each anonymous
declaration, each `InternPool.Index` value is implicitly understood to
be an anonymous declaration when encountered by backend codegen.
The memory management strategy for these anonymous decls then becomes to
garbage collect them along with standard InternPool garbage.
In the interest of a smooth transition, this commit only implements this
new scheme for string literals and leaves all the previous mechanisms in
place.
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codegen: fix field offsets in packed structs
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Illumos/Solaris updates
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* add nested packed struct/union behavior tests
* use ptr_info.packed_offset rather than trying to duplicate the logic from Sema.structFieldPtrByIndex()
* use the container_ptr_info.packed_offset to account for non-aligned nested structs.
* dedup type.packedStructFieldBitOffset() and module.structPackedFieldBitOffset()
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- Adds `illumos` to the `Target.Os.Tag` enum. A new function,
`isSolarish` has been added that returns true if the tag is either
Solaris or Illumos. This matches the naming convention found in Rust's
`libc` crate[1].
- Add the tag wherever `.solaris` is being checked against.
- Check for the C pre-processor macro `__illumos__` in CMake to set the
proper target tuple. Illumos distros patch their compilers to have
this in the "built-in" set (verified with `echo | cc -dM -E -`).
Alternatively you could check the output of `uname -o`.
Right now, both Solaris and Illumos import from `c/solaris.zig`. In the
future it may be worth putting the shared ABI bits in a base file, and
mixing that in with specific `c/solaris.zig`/`c/illumos.zig` files.
[1]: https://github.com/rust-lang/libc/tree/6e02a329a2a27f6887ea86952f389ca11e06448c/src/unix/solarish
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Another simplification. DeclGen already has `decl_index` which can be
used to retrieve the `*Decl` if needed.
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Replaces the @fabs builtin with a new @abs builtins which accepts
floats, signed integers and vectors of said types.
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When the compiler's state lives through multiple Compilation.update()
calls, the C backend stores the rendered C source code for each
decl code body and forward declarations.
With this commit, the state is still stored, but it is managed in one
big array list in link/C.zig rather than many array lists, one for each
decl. This means simpler serialization and deserialization.
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sema: add support for unions in readFromMemory and writeToMemory
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implement codegen for:
- decl weak linkage
- decl aliases
- fn decl weak linkage
windows msvc:
- `__declspec(selectany)` is not supported for functions
- skip weak linkage for functions
closes #17050
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SPIR-V doesn't support true element indexing, so we probably
need to switch over to isByRef like in llvm for this to work
properly. Currently a temporary is used, which at least
seems to work.
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