Address movement of config

Author: jpienaar

mlir/lib/Transforms/Utils/DialectConversion.cpp

@@ -2259,6 +2259,7 @@ OperationLegalizer::legalize(Operation *op,
 
   // If the operation is not legal, try to fold it in-place if the folding mode
   // is 'BeforePatterns'. 'Never' will skip this.
+  const ConversionConfig &config = rewriter.getConfig();
   if (config.foldingMode == DialectConversionFoldingMode::BeforePatterns) {
     if (succeeded(legalizeWithFold(op, rewriter))) {
       LLVM_DEBUG({

mlir/test/Transforms/test-legalizer-no-fold.mlir

@@ -8,4 +8,5 @@ func.func @remove_foldable_op(%arg0 : i32) -> (i32) {
     "foo.op_with_region_terminator"() : () -> ()
   }) : (i32) -> (i32)
   "test.return"(%0) : (i32) -> ()
-}
+}
+