* lib/target-supports-dg.exp (current_compiler_flags): New.
	(check-flags): Use it; do not access dg-test local variables.
	(dg-skip-if): Do not access dg-test local variables.
	(dg-xfail-run-if): Ditto.
	(dg-shouldfail): Ditto.
	* gcc.test-framework/test-framework.exp
	(check_effective_target_def_nocache): New.
	* gcc.test-framework/test-framework.awk: Handle scan tests.
	* gcc.test-framework/dg-do-run-xrif-nocache-exp-XF.c: New test.
	* gcc.test-framework/dg-error-nocache-exp-P.c: New test.
	* gcc.test-framework/dg-nocache-scanasm-exp-XF.c: New test.
	* gcc.test-framework/dg-warning-nocache-exp-P.c: New test.
	* gcc.test-framework/dg-nocache-sif-exp-P.c: New test.
	* gcc.test-framework/dg-nocache-sif-exp-U.c: New test.
	* gcc.test-framework/dg-nocache-xif-exp-P.c: New test.
	* gcc.test-framework/dg-do-run-sft-nocache-exp-P.c: New test.
	* gcc.test-framework/dg-nocache-xif-exp-XP.c: New test.

From-SVN: r143165