Hello,

this is a fix for a gcc-12 ICE regression.
This ICE rings a bell to me, and I think the change by Tobias which 
triggers it only uncovers a bug that can also happen independently in 
other cases.

The problem is resolution of maxloc expressions is not idempotent, that 
is resolution changes the expression in such a way that it can't be 
successfully resolved again.

I have not tried to prevent multiple resolutions, and fixed instead the 
way the expression is changed.  The patch explains the details.

No regression on x86_64-pc-linux-gnu.
OK for master and 12?