Stefan Maksimovic b794c0a5ca
[mips][msa] Splat.d endianness check ...
Before this change, it was always the first element of a vector that got splatted since the lower 6 bits of vshf.d $wd were always zero for little endian.
Additionally, masking has been performed for vshf via which splat.d is created.
Vshf has a property where if its first operand's elements have either bit 6 or 7 set, destination element is set to zero.
Initially masked with 63 to avoid this property, which would result in generation of and.v + vshf.d in all cases.
Masking with one results in generating a single splati.d instruction when possible.
Differential Revision: https://reviews.llvm.org/D32216
llvm-svn: 306090
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