For parameters and return types of functions with the C calling
convention, the LLVM backend now has a special lowering for the function
type that makes the function adhere to the C ABI. The AIR instruction
lowerings for call, ret, and ret_load are adjusted to bitcast the real
type to the ABI type if necessary.
More work on this will need to be done, however, this improvement is
enough that stage3 now passes all the same behavior tests that stage2
passes - notably, translate-c no longer has a segfault due to C ABI
issues with Zig's Clang C API wrapper.
* zig_clang is fully updated
* zig_llvm is fully updated
Some initial work on codegen.cpp is in place for upgrading to LLVM's
new opaque pointers. However there is much more to be done.
A few of zig llvm bindings for deprecated functions have been updated;
more need to be updated.
#8589 introduced correct handling of signed (possibly negative) array access
of pointers. Since unadorned integer literals in C are signed, this resulted
in inefficient generated code when indexing a pointer by a non-negative
integer literal.
Translate enum types as the underlying integer type. Translate enum constants
as top-level integer constants of the correct type (which does not necessarily
match the enum integer type).
If an enum constant's type cannot be translated for some reason, omit it.
See discussion https://github.com/ziglang/zig/issues/2115#issuecomment-827968279Fixes#9153
Don't move static local variables into the top-level scope since this
can cause name clashes if subsequently-defined variables or parameters
in different scopes share the name.
Instead, use a variable within a struct so that the variable's lexical
scope does not change. This solution was suggested by @LemonBoy
Note that a similar name-shadowing problem exists with `extern` variables
declared within block scope, but a different solution will be needed since
they do need to be moved to the top-level scope and we can't rename them.
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
Add support for OffsetOfExpr that contain exactly 1 component, when that component
is a field.
For example, given:
```c
struct S {
float f;
double d;
};
struct T {
long l;
int i;
struct S s[10];
};
```
Then:
```c
offsetof(struct T, i) // supported
offsetof(struct T, s[2].d) // not supported currently
```
Conflicts:
* src/clang.zig
* src/llvm.zig
- this file got moved to src/llvm/bindings.zig in master branch so I
had to put the new LLVM arch/os enum tags into it.
* lib/std/target.zig, src/stage1/target.cpp
- haiku had an inconsistency with its default target ABI, gnu vs
eabi. In this commit we make it gnu in both places to match the
latest changes by @hoanga.
* src/translate_c.zig
1. For incomplete arrays with initializer list (`int x[] = {1};`) use the
initializer size as the array size.
2. For arrays initialized with a string literal translate it as an array
of character literals instead of `[*c]const u8`
3. Don't crash if an empty initializer is used for an incomplete array.
4. Add a test for multi-character character constants
Additionally lay some groundwork for supporting wide string literals.
fixes#4831#7832#7842
This broke compiling with -Dstage1 on Windows, because it added the
cpp_source_files to the compilation multiple times.
This reverts commit c81ae52ee0b2e952f8ed9c5c6517af8182bb09c1.
The main idea here is that there are now 2 ways to get a stage1 zig
binary:
* The cmake path. Requirements: cmake, system C++ compiler, system
LLVM, LLD, Clang libraries, compiled by the system C++ compiler.
* The zig path. Requirements: a zig installation, system LLVM, LLD,
Clang libraries, compiled by the zig installation.
Note that the former can be used to now take the latter path.
Removed config.h.in and config.zig.in. The build.zig script no longer is
coupled to the cmake script.
cmake no longer tries to determine the zig version. A build with cmake
will yield a stage1 zig binary that reports 0.0.0+zig0. This is going to
get reverted.
`zig build` now accepts `-Dstage1` which will build the stage1 compiler,
and put the stage2 backend behind a feature flag.
build.zig is simplified to only support the use case of enabling LLVM
support when the LLVM, LLD, and Clang libraries were built by zig. This
part is probably sadly going to have to get reverted to make package
maintainers happy.
Zig build system addBuildOption supports a couple new types.
The biggest reason to make this change is that the zig path is an
attractive option for doing compiler development work on Windows. It
allows people to work on the compiler without having MSVC installed,
using only a .zip file that contains Zig + LLVM/LLD/Clang libraries.
Conflicts:
src/clang.zig
Master branch renamed an enum; this branch gave it an explicit tag type
and explicitly initialized values. This commit combines the changes
together.
