diff --git a/utils/TableGen/AsmWriterEmitter.cpp b/utils/TableGen/AsmWriterEmitter.cpp
index 6bcc52a..93ef6c8 100644
--- a/utils/TableGen/AsmWriterEmitter.cpp
+++ b/utils/TableGen/AsmWriterEmitter.cpp
@@ -650,7 +650,7 @@
   O << "\";\n\n";
 
   O << "  if (TAI->doesSupportDebugInformation() &&\n"
-    << "      DW->ShouldEmitDwarfDebug() && OptLevel != 0) {\n"
+    << "      DW->ShouldEmitDwarfDebug() && !Fast) {\n"
     << "    DebugLoc CurDL = MI->getDebugLoc();\n\n"
     << "    if (!CurDL.isUnknown()) {\n"
     << "      static DebugLocTuple PrevDLT(~0U, ~0U, ~0U);\n"
diff --git a/utils/TableGen/DAGISelEmitter.cpp b/utils/TableGen/DAGISelEmitter.cpp
index b5d334c..3335d00 100644
--- a/utils/TableGen/DAGISelEmitter.cpp
+++ b/utils/TableGen/DAGISelEmitter.cpp
@@ -465,7 +465,7 @@
       NumInputRootOps = N->getNumChildren();
 
       if (DisablePatternForFastISel(N, CGP))
-        emitCheck("OptLevel != 0");
+        emitCheck("!Fast");
 
       emitCheck(PredicateCheck);
     }