PR modula2/113836 gm2 does not dump gimple or quadruples to a file

PR modula2/113836 gm2 does not dump gimple or quadruples to a file

This patch completes the implementation of dumping the intermediate forms
to file.  It implements the filtering on symbol rules.  Filtering can be
performed through the full text name (given to the GCC tree) or qualified
modula-2 symbol or filename:qualident.

gcc/ChangeLog:

	PR modula2/113836
	* doc/gm2.texi (Compiler options): Add -fm2-debug-trace=,
	-fm2-dump, -fm2-dump-decl=, -fm2-dump-gimple=, -fm2-dump-quad=
	and -fm2-dump-filter=.

gcc/m2/ChangeLog:

	PR modula2/113836
	* gm2-compiler/M2AsmUtil.def: Remove export qualified and
	unused import.
	* gm2-compiler/M2LangDump.mod (AddRuleTextDump): New procedure.
	(AddRuleScopeQualidentDump): Add warning check against unmatched
	rule.
	(GenQualidentSymString): New procedure function.
	(IdentQualidentMatch): New procedure function.
	(IsRuleFilenameMatch): New procedure function.
	(CheckRuleMatch): New procedure function.
	(AddRuleFilenameDump): New procedure function.
	* gm2-gcc/m2misc.cc (m2misc_warning_m2_dump_filter): New function.
	* gm2-gcc/m2misc.def (warning_m2_dump_filter): New procedure.
	* gm2-gcc/m2misc.h (m2misc_warning_m2_dump_filter): New prototype.
	* gm2-gcc/m2pp.cc (VERBOSE_TYPE_DESC): New define.
	(m2pp_identifier): Define out verbose type info.
	(m2pp_constructor): Define out verbose type info.
	(m2pp_assignment): Define out verbose type info.
	* gm2-lang.cc (ENABLE_M2DUMP_ALL): Remove.
	* lang.opt (fm2-dump): Add.
	(fm2-dump-decl=): Add.
	(fm2-dump-gimple=): Add.
	(fm2-dump-quad=): Add.
	(fm2-dump-filter=): Add.

Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com>