74ef47e90c
special case that's not present in Clang Making the methods consistent doesn't require much justification. It's required for us to generate correct code. The special case was present near the end of `CastTarget::llvm_type`, and resulted in the final integer component of the ABI type being shrunk to the smallest integer that fits. You can see this in action here (https://godbolt.org/z/Pe73cr91d), where, for a struct with 5 u16 elements, rustc generates `{ i64, i16 }`, while Clang generates `[2 x i64]`. This special case was added a long time ago, when the function was originally written [1]. That commit consolidated logic from many backends, and in some of the code it deleted, sparc64 [2] and powerpc64 [3] had similar special cases. However, looking at Clang today, it doesn't have this special case for sparc64 (https://godbolt.org/z/YaafvYWdf) or powerpc64 (https://godbolt.org/z/5c3YePTje), so this change just removes it. [1]: |
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| src | ||
| Cargo.toml | ||
| README.md | ||
rustc_target contains some very low-level details that are
specific to different compilation targets and so forth.
For more information about how rustc works, see the rustc dev guide.