patch to fix PR65805

[Jakub Jelinek]

On Sun, Apr 19, 2015 at 07:49:52PM -0400, Vladimir Makarov wrote:
> The followingpatch fixes
> 
>   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65805
> 
> The problem occurred when SP was changed between the original insn and
> rematerialized one and the rematerialized insn contained a reg which will be
> substituted by SP.  In this case difference between sp offset and the
> previous sp offset was used twice.
> 
> The patch was bootstrapped and tested on x86/x86-64 and ppc64.
> 
> It is hard to create a test for the PR which will be stable. So the test is
> absent.
> 
> Committed to the trunk as rev. 222223.
> 
> Jakub, the problem is present in GCC5 RC too.  Should I commit it into
> gcc-5-branch too?

Yes, but only after the 5.1 release (Wednesday), I think it is too risky
this late before the release.

	Jakub