Mahesh Ravishankar 28d7f9c052 Add lowering of constant ops to SPIR-V. ... The lowering is specified as a pattern and is done only if the result is a SPIR-V scalar type or vector type. Handling ConstantOp with index return type needs special handling since SPIR-V dialect does not have index types. Based on the bitwidth of the attribute value, either i32 or i64 is chosen. Other constant lowerings are left as a TODO. PiperOrigin-RevId: 274056805		2019-10-10 17:19:57 -07:00
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op_conversion.mlir	Add lowering of constant ops to SPIR-V.	2019-10-10 17:19:57 -07:00