Make sure TableGen exits with an error code after printing errors.

This makes it possible to report multiple errors in one invocation.
There are already calls to PrintError in CodeGenDAGPatterns.cpp which
previously would not cause TableGen to fail.

<rdar://problem/13463339>

llvm-svn: 177573

1 files changed, 5 insertions, 2 deletions

diff --git a/llvm/lib/TableGen/Main.cpp b/llvm/lib/TableGen/Main.cpp
index e1cd6237832..dc4167b305c 100644
--- a/llvm/lib/TableGen/Main.cpp
+++ b/llvm/lib/TableGen/Main.cpp
@@ -117,11 +117,14 @@ int TableGenMain(char *argv0, TableGenMainFn *MainFn) {
   if (MainFn(Out.os(), Records))
     return 1;
 
+  if (ErrorsPrinted > 0) {
+    errs() << argv0 << ": " << ErrorsPrinted << " errors.\n";
+    return 1;
+  }
+
   // Declare success.
   Out.keep();
   return 0;
-
-  return 1;
 }
 
 }