Fix power10 fusion and -fstack-protector, PR target/105325

Fix power10 fusion and -fstack-protector, PR target/105325

This patch fixes an issue where if you use the -fstack-protector and
-mcpu=power10 options and you have a large stack frame, the GCC compiler will
generate a LWA instruction with a large offset.

There are several problems with the current GCC:

    1)	The constraints in fusion.md (generated by genfusion.pl) use "m" for LWA
	and LD, when they should use "YZ".

    2)	The normal calls to address_is_non_pfx_d_or_x doesn't work with lwa,
	because you need to pass in DImode instead of SImode.  It is simplified
	if you use the lwa_operand predicate instead of ds_form_mem_operand.

The fix is to modify genfusion.pl that it sets the "YZ" constraint instead of
"m" for the ld and lwa instructions.

I modified the genfusion.pl code use to use lwa_operand for the lwa instruction
to prevent prefixed addresses at combine time.

2023-06-08   Michael Meissner  <meissner@linux.ibm.com>

gcc/

	* config/rs6000/genfusion.pl (gen_ld_cmpi_p10_one): Fix problems that
	allowed prefixed lwa to be generated.
	* config/rs6000/fusion.md: Regenerate.

gcc/testsuite/

	* g++.target/powerpc/pr105325.C: New test.