[Bug middle-end/49721] convert_memory_address_addr_space may generate invalid new insns

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49721

--- Comment #18 from Uros Bizjak <ubizjak at gmail dot com> 2011-08-03 06:40:45 UTC ---
(In reply to comment #17)
> H.J., I agree with what you write in comment 16.  But unless we are sure that
> the problematic composition will never be generated (e.g. by ivopts), we cannot
> afford that.
> 
> The patch in comment 7 may have some snafu, but overall it looks very sane. 
> It's just that a const is not being stripped.  Can it be applied on top of the
> x32 branch?  Or do I first have to revert some earlier revision?

The patch can be applied to current trunk as-is and all the problems discussed
here will be shown by simply compiling with -mx32.