5a929a4249
Summary: It's extremely common to conditionally blend two vectors. Previously this was done with mask registers, which is what the normal ternary code generation does when used on a vector. However, since Clang 15 we have supported boolean vector types in the compiler. These are useful in general for checking the mask registers, but are currently limited because they do not map to an LLVM-IR select instruction. This patch simply relaxes these checks, which are technically forbidden by the OpenCL standard. However, general vector support should be able to handle these. We already support this for Arm SVE types, so this should be make more consistent with the clang vector type.
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