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[X86] Adding lowerings for vector ISD::LRINT and ISD::LLRINT (#90065)
- [V]CVTP[D,S]2DQ supports `f64/f32` -> `i32` conversions that can be mapped to `llvm.lrint.vNi32.vNf64/32` since SSE2. AVX and AVX512 added 256-bit and 512-bit support; - VCVTP[D,S]2QQ supports `f64/f32` -> `i64` conversions that can be mapped to `llvm.l[l]rint.vNi64.vNf64/32` since AVX512DQ. All 128-bit, 256-bit (require AVX512VL) and 512-bit are supported.
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