Abinav Puthan Purayil 078da26b1c [AMDGPU] Check for unneeded shift mask in shift PatFrags. ...

The existing constrained shift PatFrags only dealt with masked shift
from OpenCL front-ends. This change copies the
X86DAGToDAGISel::isUnneededShiftMask() function to AMDGPU and uses it in
the shift PatFrag predicates.

Differential Revision: https://reviews.llvm.org/D113448

2021-11-24 10:53:12 +05:30

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