sol2-sld-64.h (TRANSFER_FROM_TRAMPOLINE): Rework for efficiency by checking whether...

sol2-sld-64.h (TRANSFER_FROM_TRAMPOLINE): Rework for efficiency by checking whether we need to modify the current stack...

	* config/sparc/sol2-sld-64.h (TRANSFER_FROM_TRAMPOLINE): Rework
	for efficiency by checking whether we need to modify the current
	stack permission at all.
	(ASM_OUTPUT_CONSTRUCTOR, ASM_OUTPUT_DESTRUCTOR): Define.
	* config/sparc/sparc.c (sparc_initialize_trampoline): Emit
	__enable_execute_stack libcall here too if
	TRANSFER_FROM_TRAMPOLINE is defined.
	* config/sparc/sparc.h: Set TARGET_ARCH32 to a constant if
	IN_LIBGCC2.

From-SVN: r22880