[ARC] Fix and refurbish the interrupts.

When entering an interrupt, not only the call save registers needs to
be place on stack but also the call clobbers one. More over, the
ARC700 return from interrupt instruction needs to be rtie, the same
like ARCv2 CPUs. While the ARC6xx family uses j.f [ilinkX]
instruction. Additionally, we need to save the state of the ZOL
machinery, namely the lp_count, lp_end and lp_start registers. For
architectures which are using extension registers (i.e., HS48) we need
to save/restore them as well.

gcc/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc-protos.h (arc_output_function_epilogue): Delete
	declaration.
	(arc_compute_frame_size): Millicode is disabled when compiling
	ISR.
	(arc_return_address_register): Likewise.
	(arc_compute_function_type): Likewise.
	(arc_compute_frame_size): Likewise.
	(secondary_reload_info): Likewise.
	(arc_get_unalign): Likewise.
	(arc_can_use_return_insn): Declare.
	* config/arc/arc.c (AUX_LP_START): Define
	(AUX_LP_END): Likewise.
	(arc_frame_info): Update gmask member to 64-bit datum.
	(GMASK_LEN): Update.
	(arc_compute_function_type): Make it static, move it forward.
	(arc_must_save_register): Update, consider the extra regs.
	(arc_compute_millicode_save_restore_regs): Update to use the 64
	bit gmask.
	(arc_compute_frame_size): Likewise.
	(arc_enter_leave_p): Likewise.
	(arc_save_callee_saves): Likewise.
	(arc_restore_callee_saves): Likewise.
	(arc_save_callee_enter): Likewise.
	(arc_restore_callee_leave): Likewise.
	(arc_save_callee_milli): Likewise.
	(arc_restore_callee_milli): Likewise.
	(arc_expand_prologue): Add new interrupt handling.
	(arc_return_address_register): Make it static, move it forward.
	(arc_expand_epilogue): Add new interrupt handling.
	(arc_get_unalign): Delete.
	(arc_epilogue_uses): Make sure we do not remove the extra
	saved/restored registers when interrupt.
	(arc_can_use_return_insn): New function.
	(push_reg): Likewise.
	(pop_reg): Likewise.
	(arc_save_callee_saves): Add ZOL and FPX aux registers saving
	procedures.
	(arc_restore_callee_saves): Likewise, but restoring.
	* config/arc/arc.md (VUNSPEC_ARC_ARC600_RTIE): Define.
	(R33_REG): Likewise.
	(R34_REG): Likewise.
	(R35_REG): Likewise.
	(R36_REG): Likewise.
	(R37_REG): Likewise.
	(R38_REG): Likewise.
	(R39_REG): Likewise.
	(R45_REG): Likewise.
	(R46_REG): Likewise.
	(R47_REG): Likewise.
	(R48_REG): Likewise.
	(R49_REG): Likewise.
	(R50_REG): Likewise.
	(R51_REG): Likewise.
	(R52_REG): Likewise.
	(R53_REG): Likewise.
	(R54_REG): Likewise.
	(R55_REG): Likewise.
	(R56_REG): Likewise.
	(R58_REG): Likewise.
	(type): Add rtie attribute.
	(in_call_delay_slot): Use RETURN_ADDR_REGNUM.
	(movsi_insn): Accept moves to lp_count.
	(rtie): Update pattern.
	(simple_return): Simplify it, don't use this pattern as a return
	from an interrupt.
	(arc600_rtie): New pattern.
	(p_return_i): Clean up.
	(return): Likewise.
	* config/arc/builtins.def (rtie): Only available for non ARC6xx
	family CPUs.
	* config/arc/predicates.md (move_src_operand): Consider lp_count
	as a register.

gcc/testsuite
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

	* gcc.target/arc/arc.exp (check_effective_target_accregs): New
	predicate.
	* gcc.target/arc/builtin_special.c: Update test/
	* gcc.target/arc/interrupt-1.c: Likewise.
	* gcc.target/arc/interrupt-10.c: New test.
	* gcc.target/arc/interrupt-11.c: Likewise.
	* gcc.target/arc/interrupt-12.c: Likewise.

update

From-SVN: r273761

1 files changed, 1 insertions, 6 deletions

diff --git a/gcc/config/arc/arc-protos.h b/gcc/config/arc/arc-protos.h
index 74e5247..1220e77 100644
--- a/gcc/config/arc/arc-protos.h
+++ b/gcc/config/arc/arc-protos.h
@@ -25,7 +25,6 @@ extern machine_mode arc_select_cc_mode (enum rtx_code, rtx, rtx);
 extern struct rtx_def *gen_compare_reg (rtx, machine_mode);
 
 /* Declarations for various fns used in the .md file.  */
-extern void arc_output_function_epilogue (FILE *, HOST_WIDE_INT, int);
 extern const char *output_shift (rtx *);
 extern bool compact_sda_memory_operand (rtx, machine_mode, bool);
 extern bool arc_double_limm_p (rtx);
@@ -42,8 +41,6 @@ extern void arc_expand_atomic_op (enum rtx_code, rtx, rtx, rtx, rtx, rtx);
 extern void arc_split_compare_and_swap (rtx *);
 extern void arc_expand_compare_and_swap (rtx *);
 extern bool compact_memory_operand_p (rtx, machine_mode, bool, bool);
-extern int arc_return_address_register (unsigned int);
-extern unsigned int arc_compute_function_type (struct function *);
 extern bool arc_is_uncached_mem_p (rtx);
 extern bool gen_operands_ldd_std (rtx *operands, bool load, bool commute);
 extern bool arc_check_multi (rtx, bool);
@@ -52,9 +49,9 @@ extern bool arc_check_ior_const (HOST_WIDE_INT );
 extern void arc_split_ior (rtx *);
 extern bool arc_check_mov_const (HOST_WIDE_INT );
 extern bool arc_split_mov_const (rtx *);
+extern bool arc_can_use_return_insn (void);
 #endif /* RTX_CODE */
 
-extern unsigned int arc_compute_frame_size (int);
 extern bool arc_ccfsm_branch_deleted_p (void);
 extern void arc_ccfsm_record_branch_deleted (void);
 
@@ -71,7 +68,6 @@ extern bool arc_is_longcall_p (rtx);
 extern bool arc_is_shortcall_p (rtx);
 extern bool valid_brcc_with_delay_p (rtx *);
 extern bool arc_ccfsm_cond_exec_p (void);
-struct secondary_reload_info;
 extern rtx disi_highpart (rtx);
 extern int arc_adjust_insn_length (rtx_insn *, int, bool);
 extern int arc_corereg_hazard (rtx, rtx);
@@ -89,7 +85,6 @@ extern void arc_expand_prologue (void);
 extern void arc_expand_epilogue (int);
 extern void arc_init_expanders (void);
 extern int arc_check_millicode (rtx op, int offset, int load_p);
-extern int arc_get_unalign (void);
 extern void arc_clear_unalign (void);
 extern void arc_toggle_unalign (void);
 extern void split_addsi (rtx *);