0c2a6f2d62
Replaces separate x86vector named intrinsic operations with direct calls
to LLVM intrinsic functions.
This rework reduces the number of named ops leaving only high-level MLIR
equivalents of whole intrinsic classes e.g., variants of AVX512 dot on
BF16 inputs. Dialect conversion applies LLVM intrinsic name mangling
further simplifying lowering logic.
The separate conversion step translating x86vector intrinsics into LLVM
IR is also eliminated. Instead, this step is now performed by the
existing llvm dialect infrastructure.
RFC:
https://discourse.llvm.org/t/rfc-simplify-x86-intrinsic-generation/85581
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