[llvm] Add 3 way compare <=> integer intrinsics to Langref (PR #83227)

[Nikita Popov via llvm-commits]

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@@ -2136,7 +2136,14 @@ let IntrProperties = [IntrNoMem, IntrNoSync, IntrWillReturn] in {
                                llvm_metadata_ty,
                                LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>,
                                llvm_i32_ty]>;
-
+  def int_vp_sthreecmp : DefaultAttrsIntrinsic<[ LLVMScalarOrSameVectorWidth<0, llvm_i8_ty> ],
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nikic wrote:

The `vp` intrinsics are for "vector predication", which is basically about applying an operation only to a subset of vector lanes. These would be "normal" intrinsics. Again, I'd look at something like int_smin or int_sadd_sat.

https://github.com/llvm/llvm-project/pull/83227