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https://codeberg.org/ziglang/zig.git
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4ce7b57e86
The main goal here was to avoid allocating padding and header space if `malloc` already guarantees the alignment we need via `max_align_t`. Previously, the compiler was using `std.heap.raw_c_allocator` as its GPA in some cases depending on `std.c.max_align_t`, but that's pretty fragile (it meant we had to encode our alignment requirements into `src/main.zig`!). Perhaps more importantly, that solution is unnecessarily restrictive: since Zig's `Allocator` API passes the `Alignment` not only to `alloc`, but also to `free` etc, we are able to use a different strategy depending on its value. So `c_allocator` can simply compare the requested align to `Alignment.of(std.c.max_align_t)`, and use a raw `malloc` call (no header needed!) if it will guarantee a suitable alignment (which, in practice, will be true the vast majority of the time). So in short, this makes `std.heap.c_allocator` more memory efficient, and probably removes any incentive to use `std.heap.raw_c_allocator`. I also refactored the `c_allocator` implementation while doing this, just to neaten things up a little. |
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| .. | ||
| Air | ||
| codegen | ||
| Compilation | ||
| libs | ||
| link | ||
| Package | ||
| Sema | ||
| Zcu | ||
| Air.zig | ||
| Builtin.zig | ||
| clang_options.zig | ||
| clang_options_data.zig | ||
| codegen.zig | ||
| Compilation.zig | ||
| crash_report.zig | ||
| DarwinPosixSpawn.zig | ||
| dev.zig | ||
| fmt.zig | ||
| IncrementalDebugServer.zig | ||
| InternPool.zig | ||
| introspect.zig | ||
| link.zig | ||
| main.zig | ||
| mutable_value.zig | ||
| Package.zig | ||
| print_env.zig | ||
| print_targets.zig | ||
| print_value.zig | ||
| print_zir.zig | ||
| print_zoir.zig | ||
| RangeSet.zig | ||
| register_manager.zig | ||
| Sema.zig | ||
| target.zig | ||
| tracy.zig | ||
| Type.zig | ||
| Value.zig | ||
| Zcu.zig | ||
| zig_clang_cc1_main.cpp | ||
| zig_clang_cc1as_main.cpp | ||
| zig_clang_driver.cpp | ||
| zig_llvm-ar.cpp | ||
| zig_llvm.cpp | ||
| zig_llvm.h | ||