[PATCH/expand] PR64011 Adjust bitsize when partial overflow happen for big-endian

[Joseph Myers]

On Tue, 13 Jan 2015, Jeff Law wrote:

> In many ways having the compiler or assembler spitting out an error here is
> preferable to silently compiling the code.  That would also help explain why

As usual, an error is incorrect in such a case that only has undefined 
behavior at runtime (but it may be compiled into an abort if the behavior 
is unconditionally undefined, and the abort doesn't replace anything 
before the undefined behavior that might have stopped the undefined 
behavior from occurring).

-- 
Joseph S. Myers
joseph@codesourcery.com