[clang] [mlir][sparse] Print new syntax (PR #68130)

[Aart Bik via cfe-commits]

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@@ -586,30 +586,56 @@ Attribute SparseTensorEncodingAttr::parse(AsmParser &parser, Type type) {
 }
 
 void SparseTensorEncodingAttr::print(AsmPrinter &printer) const {
-  // Print the struct-like storage in dictionary fashion.
-  printer << "<{ lvlTypes = [ ";
-  llvm::interleaveComma(getLvlTypes(), printer, [&](DimLevelType dlt) {
-    printer << "\"" << toMLIRString(dlt) << "\"";
-  });
-  printer << " ]";
+  auto map = static_cast<AffineMap>(getDimToLvl());
+  auto lvlTypes = getLvlTypes();
+  // Empty affine map indicates identity map
+  if (!map) {
+    map = AffineMap::getMultiDimIdentityMap(getLvlTypes().size(), getContext());
+  }
+  // Modified version of AsmPrinter::Impl::printAffineMap.
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aartbik wrote:

I would remove this. This is diverged sufficiently to no longer refer to printAffineMap

https://github.com/llvm/llvm-project/pull/68130