[Bug target/72853] gcc/testsuite/gcc.c-torture/execute/20021120-1.c generates incorrect stxssp op with -mcpu=power9

[amodra at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72853

Alan Modra <amodra at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |amodra at gmail dot com

--- Comment #5 from Alan Modra <amodra at gmail dot com> ---
Yeah, Alan did mess up here in removing offsettable_address_p from the wY
constraint.  It wasn't entirely accidental either.  I'd intended to add a
simpler test in mem_operand_ds_form to replace it.

Mike, shouldn't the test in your fix be
  if (!offsettable_address_p (false, mode, addr))
ie. *not* strict?

See tm-constrs.h "o" constraint test:

static inline bool
satisfies_constraint_o (rtx op)
{
  return (GET_CODE (op) == MEM) && (
#line 32 "/home/alan/src/gcc.git/gcc/common.md"
(offsettable_nonstrict_memref_p (op)));
}