PHIOPT: add folding/simplification detail to the dump

While debugging PHI-OPT with match-and-simplify,
I found that adding more dumping to the debug dumps made
it easier to understand what was going on rather than stepping in
the debugger so this adds them. Note I used TDF_FOLDING rather
than TDF_DETAILS as these debug messages can be chatty and
only needed if you are debugging match and simplify
with PHI-OPT and match and simplify uses TDF_FOLDING as
its check.

OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.

gcc/ChangeLog:

	* tree-ssa-phiopt.cc (gimple_simplify_phiopt): Dump
	the expression that is being tried when TDF_FOLDING
	is true.
	(phiopt_worker::match_simplify_replacement): Dump
	the sequence which was created by gimple_simplify_phiopt
	when TDF_FOLDING is true.

0 files changed, 0 insertions, 0 deletions