MSP430: Disallow use of code/data regions in the small memory model

MSP430: Disallow use of code/data regions in the small memory model

gcc/ChangeLog:

2019-07-29  Jozef Lawrynowicz  <jozef.l@mittosystems.com>

	* config/msp430/msp430.h (DRIVER_SELF_SPECS): Define and emit errors
	when -m{code,data}-region are used without -mlarge.
	* config/msp430/msp430.c (msp430_option_override): Error when a
	non-default code or data region is used without -mlarge.
	(msp430_section_attr): Emit a warning and do not add upper/lower/either
	attributes when they are used without -mlarge.

gcc/testsuite/ChangeLog:

2019-07-29  Jozef Lawrynowicz  <jozef.l@mittosystems.com>

	* gcc.target/msp430/pr78818-data-region.c: Add -mlarge to dg-options.
	* gcc.target/msp430/region-misuse-code.c: New test.
	* gcc.target/msp430/region-misuse-data.c: Likewise.
	* gcc.target/msp430/region-misuse-code-data.c: Likewise.
	* gcc.target/msp430/region-attribute-misuse.c: Likewise.

From-SVN: r273884