This PR adds targeted testing for a few remaining miscellaneous SPIR-V
1.4 features:
* Variables in the Function storage class can have a NonWriteable
decoration.
* OpCopyMemorySized can have two optional memory operands.
* OpSelect can have composite operands that are not vectors.
This PR adds targeted testing for more SPIR-V 1.4 features.
Specifically, this PR adds testing for OpDecorateString,
OpMemberDecorateString, and the UserSemantic decoration.
This PR adds targeted testing for SPIR-V 1.4 features. Specifically,
this PR adds testing for:
1. The new Image Operand for SignExtend and ZeroExtend.
2. The new Loop Controls MinIterations, MaxIterations,
IterationMultiple, PeelCount, and PartialCount.
