re PR target/83641 (-fstack-clash-protection generates incorrect CFI on i386)

re PR target/83641 (-fstack-clash-protection generates incorrect CFI on i386)

	PR target/83641
	* config/i386/i386.c (ix86_adjust_stack_and_probe_stack_clash): For
	noreturn probe, use gen_pop instead of ix86_emit_restore_reg_using_pop,
	only set RTX_FRAME_RELATED_P on both the push and pop if cfa_reg is sp
	and add REG_CFA_ADJUST_CFA notes in that case to both insns.

	PR target/83641
	* config/i386/i386.c (ix86_adjust_stack_and_probe_stack_clash): Do not
	explicitly probe *sp in a noreturn function if there were any callee
	register saves or frame pointer is needed.

	PR target/83641
	* gcc.target/i386/stack-check-17.c: New test.
	* gcc.target/i386/stack-check-12.c: Drop unnecessary asm.

From-SVN: r256191