re PR target/49030 (ICE in get_arm_condition_code, at config/arm/arm.c:17180)

re PR target/49030 (ICE in get_arm_condition_code, at config/arm/arm.c:17180)

gcc/
	PR target/49030
	* config/arm/arm-protos.h (maybe_get_arm_condition_code): Declare.
	* config/arm/arm.c (maybe_get_arm_condition_code): New function,
	reusing the old code from get_arm_condition_code.  Return ARM_NV
	for invalid comparison codes.
	(get_arm_condition_code): Redefine in terms of
	maybe_get_arm_condition_code.
	* config/arm/predicates.md (arm_comparison_operator): Use
	maybe_get_arm_condition_code.

gcc/testsuite/
	PR target/49030
	* gcc.dg/torture/pr49030.c: New test.

From-SVN: r178636