Index: llvm/utils/TableGen/GlobalISel/GIMatchDag.cpp
===================================================================
--- llvm/utils/TableGen/GlobalISel/GIMatchDag.cpp
+++ llvm/utils/TableGen/GlobalISel/GIMatchDag.cpp
@@ -48,7 +48,7 @@
          << Assignment.first << ")";
       Separator = ", ";
     }
-    OS << format("|%p|", &N);
+    OS << llvm::format("|%p|", &N);
     writePorts("d", N->getOperandInfo());
     OS << "}\"";
     if (N->isMatchRoot())
@@ -82,7 +82,7 @@
     writePorts("s", N->getOperandInfo());
     OS << "|" << N->getName() << "|";
     N->printDescription(OS);
-    OS << format("|%p|", &N);
+    OS << llvm::format("|%p|", &N);
     writePorts("d", N->getOperandInfo());
     OS << "}\",style=dotted]\n";
   }