From 0a304f06b13aa0db43ceb2f9aa2937035df20df6 Mon Sep 17 00:00:00 2001
From: Pete Cooper <peter_cooper@apple.com>
Date: Tue, 2 Sep 2014 23:23:34 +0000
Subject: [PATCH] Tablegen scheduling models don't reference empty itineraries
 as of r216919, so don't emit the unused itinerary variables

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216993 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/TableGen/SubtargetEmitter.cpp | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/utils/TableGen/SubtargetEmitter.cpp b/utils/TableGen/SubtargetEmitter.cpp
index d05c7c78035..a644d371dfc 100644
--- a/utils/TableGen/SubtargetEmitter.cpp
+++ b/utils/TableGen/SubtargetEmitter.cpp
@@ -575,12 +575,13 @@ EmitItineraries(raw_ostream &OS,
     assert(ProcItinListsIter != ProcItinLists.end() && "bad iterator");
     std::vector<InstrItinerary> &ItinList = *ProcItinListsIter;
 
+    // Empty itineraries aren't referenced anywhere in the tablegen output
+    // so don't emit them.
+    if (ItinList.empty())
+      continue;
+
     OS << "\n";
     OS << "static const llvm::InstrItinerary ";
-    if (ItinList.empty()) {
-      OS << '*' << Name << " = nullptr;\n";
-      continue;
-    }
 
     // Begin processor itinerary table
     OS << Name << "[] = {\n";