1820102167
Reland #161355, after fixing up the cross-projects-tests for the wasm simd intrinsics. Original commit message: Lower v4f32 and v2f64 fmuladd calls to relaxed_madd instructions. If we have FP16, then lower v8f16 fmuladds to FMA. I've introduced an ISD node for fmuladd to maintain the rounding ambiguity through legalization / combine / isel.
-*- rst -*- This is a collection of tests to check that the expected assembly is generated from clang intrinsic headers.