[MSP430] Align functions on 2-byte boundary instead of 4.

Summary:
There is no benefit in having the 4-byte alignment, and removing this
restriction can save a lot of space for some applications.

Reviewers: asl, awygle

Reviewed By: awygle

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D36165

llvm-svn: 313676

llvm/lib/Target/MSP430/MSP430ISelLowering.cpp

@@ -322,7 +322,7 @@ MSP430TargetLowering::MSP430TargetLowering(const TargetMachine &TM,
   // TODO: __mspabi_srall, __mspabi_srlll, __mspabi_sllll
 
   setMinFunctionAlignment(1);
-  setPrefFunctionAlignment(2);
+  setPrefFunctionAlignment(1);
 }
 
 SDValue MSP430TargetLowering::LowerOperation(SDValue Op,