Rollup of 4 pull requests #130386
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Rollup of 4 pull requests #130386
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-0.0 is the actual neutral additive float, not +0.0, and this matters to codegen.
This is a follow-up to rust-lang#123159, but applied to Armv8-R. This required llvm/llvm-project#88287 to work properly. Now that this change exists in rustc's llvm, we can fix Armv8-R's default fpu features. In Armv8-R's case, the default features from LLVM for floating-point are sufficient, because there is no integer-only variant of this architecture.
…ingjubilee Fix target-cpu fpu features on Armv8-R. This is a follow-up to rust-lang#123159, but applied to Armv8-R. This required llvm/llvm-project#88287 to work properly. Now that this change exists in rustc's llvm, we can fix Armv8-R's default fpu features. In Armv8-R's case, the default features from LLVM for floating-point are sufficient, because there is no integer-only variant of this architecture.
…ux, r=RalfJung,jieyouxu Use -0.0 in `intrinsics::simd::reduce_add_unordered` -0.0 is the actual neutral additive float, not +0.0, and this matters to codegen. try-job: aarch64-gnu
… r=compiler-errors Correctly account for niche-optimized tags in rustc_transmute This is a bit hacky, but it fixes the ICE and makes it possible to run the safe transmute check on every `mem::transmute` check we instantiate. I want to write a lint that needs to do that, but this stands well on its own. cc `@jswrenn` here's the fix I alluded to yesterday :) Fixes rust-lang#123693
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Successful merges:
intrinsics::simd::reduce_add_unordered#130325 (Use -0.0 inintrinsics::simd::reduce_add_unordered)trait_upcastingexample should not have#![allow(incomplete_features)]#130370 (unstable-book:trait_upcastingexample should not have#![allow(incomplete_features)])r? @ghost
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