From bebdb204d225dffbb98129348224a21bbe72a033 Mon Sep 17 00:00:00 2001
From: Misha Brukman <brukman+llvm@gmail.com>
Date: Fri, 4 Jun 2004 14:59:42 +0000
Subject: Emit a more sensible error message if no subclasses of Target are
 defined. Patch contributed by Vladimir Prus.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14010 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/TableGen/CodeGenWrappers.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'utils/TableGen/CodeGenWrappers.cpp')

diff --git a/utils/TableGen/CodeGenWrappers.cpp b/utils/TableGen/CodeGenWrappers.cpp
index bf641fa276..842294a037 100644
--- a/utils/TableGen/CodeGenWrappers.cpp
+++ b/utils/TableGen/CodeGenWrappers.cpp
@@ -72,6 +72,8 @@ std::ostream &operator<<(std::ostream &OS, MVT::ValueType T) {
 ///
 CodeGenTarget::CodeGenTarget() : PointerType(MVT::Other) {
   std::vector<Record*> Targets = Records.getAllDerivedDefinitions("Target");
+  if (Targets.size() == 0)
+    throw std::string("ERROR: No 'Target' subclasses defined!");  
   if (Targets.size() != 1)
     throw std::string("ERROR: Multiple subclasses of Target defined!");
   TargetRec = Targets[0];
-- 
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