arm-cores.def (cortex-m7): Add flag FL_NO_VOLATILE_CE.

arm-cores.def (cortex-m7): Add flag FL_NO_VOLATILE_CE.

gcc/
	* config/arm/arm-cores.def (cortex-m7): Add flag FL_NO_VOLATILE_CE.
	* config/arm/arm-protos.h (FL_NO_VOLATILE_CE): New flag.
	(arm_arch_no_volatile_ce): Declare new global variable.
	* config/arm/arm.c (arm_arch_no_volatile_ce): New global variable.
	(arm_option_override): Assign value to arm_arch_no_volatile_ce.
	* config/arm/arm.h (arm_arch_no_volatile_ce): Declare it.
	(TARGET_NO_VOLATILE_CE): New macro.
	* config/arm/arm.md (arm_comparison_operator): Disabled if not allow
	volatile memory access in IT block

gcc/testsuite/
	* gcc.target/arm/no-volatile-in-it.c: New test.

From-SVN: r220999