Abinav Puthan Purayil 485dd0b752 [GlobalISel] Handle constant splat in funnel shift combine ...

This change adds the constant splat versions of m_ICst() (by using
getBuildVectorConstantSplat()) and uses it in
matchOrShiftToFunnelShift(). The getBuildVectorConstantSplat() name is
shortened to getIConstantSplatVal() so that the *SExtVal() version would
have a more compact name.

Differential Revision: https://reviews.llvm.org/D125516

2022-05-16 16:03:30 +05:30

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