PR target/41246
	* config/i386/i386.c (ix86_function_regparm): Do not issue an
	error for nested functions with regparm=3.
	(ix86_compute_frame_layout): Adjust frame pointer offset for
	ix86_static_chain_on_stack.
	(ix86_expand_prologue): Handle ix86_static_chain_on_stack.
	(ix86_emit_restore_reg_using_pop): Increment ix86_cfa_state->offset,
	don't reset to UNITS_PER_WORD.
	(ix86_emit_leave): Adjust ix86_cfa_state.
	(ix86_expand_epilogue): Handle ix86_static_chain_on_stack.
	(ix86_static_chain): New.
	(ix86_trampoline_init): Rename from x86_initialize_trampoline;
	make static; update for target hook parameters; use ix86_static_chain.
	(TARGET_STATIC_CHAIN, TARGET_TRAMPOLINE_INIT): New.
	* config/i386/i386.h (STATIC_CHAIN_REGNUM): Remove.
	(INITIALIZE_TRAMPOLINE): Remove.
	(TRAMPOLINE_SIZE): Use 24 for 64-bit.
	(struct machine_function): Use BOOL_BITFIELD; rearrange bitfields
	to the end.  Add static_chain_on_stack.
	(ix86_static_chain_on_stack): New.

From-SVN: r152018