Add a "compact" mode to print_rtx_function

Add a "compact" mode to print_rtx_function

gcc/ChangeLog:
	* function-tests.c (selftest::test_expansion_to_rtl): Add "true"
	for new "compact" param of print_rtx_function.  Check for "cinsn"
	rather than "insn".
	* print-rtl-function.c (flag_compact): New decl.
	(print_rtx_function): Add param "compact" and use it to set
	flag_compact, adding a description of the effect to the leading
	comment, and updating the example output.
	* print-rtl.c (flag_compact): New variable.
	(print_rtx_operand_code_0): Omit the JUMP_LABEL reference in compact
	mode.
	(print_rtx_operand_code_i): When printing source locations, wrap
	xloc.file in quotes.  Don't print INSN_CODEs in compact mode.
	(print_rtx_operand_code_r): Don't print regnos for hard regs and
	virtuals in compact mode.
	(print_rtx_operand_code_u): Don't print insn UIDs in compact mode,
	apart from in LABEL_REFs.
	(print_rtx_operand): In case 'w', don't print in hex in compact mode.
	Don't print basic block ids in compact mode.
	(print_rtx):  In compact mode, prefix the code of insns with "c",
	only print the INSN_UID of CODE_LABELs, and omit their LABEL_NUSES.
	* print-rtl.h (print_rtx_function): Add "compact" param.

gcc/testsuite/ChangeLog:
	* gcc.target/i386/vararg-loc.c: Update for quoting of xloc.file
	in INSN_LOCATION.

From-SVN: r241120