Use vld1/vst1 to load/store f64 if alignment is < 4 and the target allows unaligned access. rdar://12091029

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161962 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index c66618a..77181cf 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -8808,6 +8808,8 @@
   case MVT::i16:
   case MVT::i32:
     return true;
+  case MVT::f64:
+    return Subtarget->hasNEON();
   // FIXME: VLD1 etc with standard alignment is legal.
   }
 }