[Instcombiner]Improve emission of logical or/and reductions.
For logical or/and reductions we emit regular intrinsics @llvm.vector.reduce.or/and.vxi1 calls. These intrinsics are not effective for the logical or/and reductions, especially if the optimizer is able to emit short circuit versions of the scalar or/and instructions and vector code gets less effective than the scalar version. Instead, or reduction for i1 can be represented as: ``` %val = bitcast <ReduxWidth x i1> to iReduxWidth %res = cmp ne iReduxWidth %val, 0 ``` and reduction for i1 can be represented as: ``` %val = bitcast <ReduxWidth x i1> to iReduxWidth %res = cmp eq iReduxWidth %val, 11111 ``` This improves perfromance of the vector code significantly and make it to outperform short circuit scalar code. Part of D57059. Differential Revision: https://reviews.llvm.org/D97406
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