[Bug target/92905] [10 Regression] Spills float-int union to memory

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92905

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Note, it isn't about <g>, using r<i>m in the first alternative of the reverted
define_insn works well too, as well as swapping the alternatives (that is in
that case basically what the trunk has, except in the second alternative the
second input is r<i>m instead of m.  If the second alternative of second input
is <i>m,
it works the same as current trunk (unnecessary spill), if it is rm, it works
well.
Now, no idea if this isn't a bug in LRA or if there are some rules that the
seemingly redundant constraints actually aren't redundant.