Index: lib/Target/ARM/ARMISelLowering.cpp
===================================================================
--- lib/Target/ARM/ARMISelLowering.cpp
+++ lib/Target/ARM/ARMISelLowering.cpp
@@ -3066,6 +3066,10 @@
   if (!PaddingPossible || Align > 4 || Size > ConstpoolPromotionMaxSize)
     return SDValue();
 
+  // The constant pool can only handle constants with a Size >= 4.
+  if (Size < 4)
+    return SDValue();
+
   unsigned PaddedSize = Size + ((RequiredPadding == 4) ? 0 : RequiredPadding);
   MachineFunction &MF = DAG.getMachineFunction();
   ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();