Fix swerv issues with Increment nodes (#2380)

src/V3LinkInc.cpp

@@ -124,6 +124,14 @@ private:
         iterateChildren(nodep);
         m_insStmtp = NULL;  // Next thing should be new statement
     }
+    virtual void visit(AstNodeBlock* nodep) VL_OVERRIDE {
+        AstNode* insStmtp_prev = m_insStmtp;
+        {
+            m_insStmtp = NULL;
+            iterateChildren(nodep);
+        }
+        m_insStmtp = insStmtp_prev;
+    }
     void unsupported_visit(AstNode* nodep) {
         m_unsupportedHere = true;
         UINFO(9, "Marking unsupported " << nodep << endl);

test_regress/t/t_array_index_increment.v

@@ -107,6 +107,14 @@ module t (/*AUTOARG*/
       if (i !== 4) $stop;
       if (val !== 4) $stop;
 
+
+      pos = 0;
+      if (1 == 1) begin
+         pos++;
+      end
+
+      if (pos != 1) $stop;
+
       $write("*-* All Finished *-*\n");
       $finish;