Update comments to make it clear that the function alignment is the Log2 of the
bytes and not bytes.

llvm-svn: 74624
diff --git a/llvm/lib/Target/Alpha/AlphaISelLowering.h b/llvm/lib/Target/Alpha/AlphaISelLowering.h
index 1d6fad6..0a843c2 100644
--- a/llvm/lib/Target/Alpha/AlphaISelLowering.h
+++ b/llvm/lib/Target/Alpha/AlphaISelLowering.h
@@ -103,7 +103,7 @@
 
     virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const;
 
-    /// getFunctionAlignment - Return the function alignment.
+    /// getFunctionAlignment - Return the Log2 alignment of this function.
     virtual unsigned getFunctionAlignment(const Function *F) const;
 
   private: