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1d92c1d8b2
This round is dependant on https://github.com/rust-lang/llvm-project/pull/101 landing first in rust-lang/rust and won't pass CI until that does. That PR, however, will also break wasm CI because it's changing how the wasm target works. My goal here is to open this early to get it out there so that when that PR lands in rust-lang/rust and CI breaks in stdarch then this can be merged to make CI green again. The changes here are mostly around the codegen for various intrinsics. Some wasm-specific intrinsics have been removed in favor of more general LLVM intrinsics, and other intrinsics have been removed in favor of pattern-matching codegen. The only new instruction supported as part of this chagne is `v128.any_true`. This leaves only one instruction unsupported in LLVM which is `i64x2.abs`. I think the codegen for the instruction is correct in stdsimd, though, and LLVM just needs to update with a pattern-match to actually emit the opcode. That'll happen in a future LLVM update.