Use compact unwind for the iOS simulator.

Another step in fixing pr19185.

llvm-svn: 211416
diff --git a/llvm/lib/MC/MCObjectFileInfo.cpp b/llvm/lib/MC/MCObjectFileInfo.cpp
index ebc67ac..971b1a6 100644
--- a/llvm/lib/MC/MCObjectFileInfo.cpp
+++ b/llvm/lib/MC/MCObjectFileInfo.cpp
@@ -31,6 +31,11 @@
   if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6))
     return true;
 
+  // And the iOS simulator.
+  if (T.isiOS() &&
+      (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86))
+    return true;
+
   return false;
 }