* i960/i960.c (i960_function_prologue): Don't save static chain
	pointer.
	* i960/i960.h (STACK_CHAIN_REGNUM): Change from r3 to g12.
	(TRAMPOLINE_TEMPLATE): Likewise.
	(FRAME_POINTER_REQUIRED): Check current_function_has_nonlocal_goto.
	* i960/i960.md (nonlocal_goto): Rewrite.

From-SVN: r26282