Add NoSideEffect to Affine min max

[OuHangKresnik]

Summary

Add NoSideEffect

[ftynse]

Thanks!

mlir/include/mlir/Dialect/AffineOps/AffineOps.td

let extraClassDeclaration = [{
     static StringRef getMapAttrName() { return "map"; }
   }];
   let verifier = [{ return ::verifyAffineMinMaxOp(*this); }];
   let printer = [{ return ::printAffineMinMaxOp(p, *this); }];
   let parser = [{ return ::parseAffineMinMaxOp<$cppClass>(parser, result); }];
   let hasFolder = 1;
 }
 
-def AffineMinOp : AffineMinMaxOpBase<"min"> {
+def AffineMinOp : AffineMinMaxOpBase<"min", [NoSideEffect]> {
   let summary = "min operation";
   let description = [{
     The "min" operation computes the minimum value result from a multi-result
     affine map.
 
     Example:
 
        %0 = affine.min (d0) -> (1000, d0 + 512) (%i0) : index
   }];
 }
 
-def AffineMaxOp : AffineMinMaxOpBase<"max"> {
+def AffineMaxOp : AffineMinMaxOpBase<"max", [NoSideEffect]> {
   let summary = "max operation";
   let description = [{
     The "max" operation computes the maximum value result from a multi-result
     affine map.
 
     Example:
 
        %0 = affine.max (d0) -> (1000, d0 + 512) (%i0) : index