1 /* Definitions of target machine for GNU compiler,
2 for ATMEL AVR at90s8515, ATmega103/103L, ATmega603/603L microcontrollers.
3 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 Free Software Foundation, Inc.
6 Contributed by Denis Chertykov (chertykov@gmail.com)
8 This file is part of GCC.
10 GCC is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3, or (at your option)
15 GCC is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with GCC; see the file COPYING3. If not see
22 <http://www.gnu.org/licenses/>. */
24 /* Names to predefine in the preprocessor for this target machine. */
31 /* Core have 'MUL*' instructions. */
34 /* Core have 'CALL' and 'JMP' instructions. */
37 /* Core have 'MOVW' and 'LPM Rx,Z' instructions. */
40 /* Core have 'ELPM' instructions. */
43 /* Core have 'ELPM Rx,Z' instructions. */
46 /* Core have 'EICALL' and 'EIJMP' instructions. */
47 int have_eijmp_eicall;
49 /* This is an XMEGA core. */
52 /* This core has the RAMPD special function register
53 and thus also the RAMPX, RAMPY and RAMPZ registers. */
56 /* Default start of data section address for architecture. */
57 int default_data_section_start;
59 /* Offset between SFR address and RAM address:
60 SFR-address = RAM-address - sfr_offset */
63 /* Architecture id to built-in define __AVR_ARCH__ (NULL -> no macro) */
64 const char *const macro;
66 /* Architecture name. */
67 const char *const arch_name;
70 /* These names are used as the index into the avr_arch_types[] table
95 const char *const name;
97 /* Index in avr_arch_types[]. */
100 /* Must lie outside user's namespace. NULL == no macro. */
101 const char *const macro;
103 /* Stack pointer have 8 bits width. */
106 /* Some AVR devices have a core erratum when skipping a 2-word instruction.
107 Skip instructions are: SBRC, SBRS, SBIC, SBIS, CPSE.
108 Problems will occur with return address is IRQ executes during the
111 A support ticket from Atmel returned the following information:
113 Subject: (ATTicket:644469) On AVR skip-bug core Erratum
114 From: avr@atmel.com Date: 2011-07-27
115 (Please keep the subject when replying to this mail)
117 This errata exists only in AT90S8515 and ATmega103 devices.
119 For information please refer the following respective errata links
120 http://www.atmel.com/dyn/resources/prod_documents/doc2494.pdf
121 http://www.atmel.com/dyn/resources/prod_documents/doc1436.pdf */
123 /* Core Erratum: Must not skip 2-word instruction. */
126 /* Start of data section. */
127 int data_section_start;
129 /* Number of 64k segments in the flash. */
132 /* Name of device library. */
133 const char *const library_name;
136 /* Preprocessor macros to define depending on MCU type. */
137 extern const char *avr_extra_arch_macro;
138 extern const struct base_arch_s *avr_current_arch;
139 extern const struct mcu_type_s *avr_current_device;
140 extern const struct mcu_type_s avr_mcu_types[];
141 extern const struct base_arch_s avr_arch_types[];
145 /* Id of the address space as used in c_register_addr_space */
148 /* Flavour of memory: 0 = RAM, 1 = Flash */
151 /* Width of pointer (in bytes) */
154 /* Name of the address space as visible to the user */
157 /* Segment (i.e. 64k memory chunk) number. */
160 /* Section prefix, e.g. ".progmem1.data" */
161 const char *section_name;
164 extern const avr_addrspace_t avr_addrspace[];
166 /* Known address spaces */
170 ADDR_SPACE_RAM, /* ADDR_SPACE_GENERIC */
182 #define TARGET_CPU_CPP_BUILTINS() avr_cpu_cpp_builtins (pfile)
184 #define AVR_HAVE_JMP_CALL (avr_current_arch->have_jmp_call && !TARGET_SHORT_CALLS)
185 #define AVR_HAVE_MUL (avr_current_arch->have_mul)
186 #define AVR_HAVE_MOVW (avr_current_arch->have_movw_lpmx)
187 #define AVR_HAVE_LPMX (avr_current_arch->have_movw_lpmx)
188 #define AVR_HAVE_ELPM (avr_current_arch->have_elpm)
189 #define AVR_HAVE_ELPMX (avr_current_arch->have_elpmx)
190 #define AVR_HAVE_RAMPD (avr_current_arch->have_rampd)
191 #define AVR_HAVE_RAMPX (avr_current_arch->have_rampd)
192 #define AVR_HAVE_RAMPY (avr_current_arch->have_rampd)
193 #define AVR_HAVE_RAMPZ (avr_current_arch->have_elpm \
194 || avr_current_arch->have_rampd)
195 #define AVR_HAVE_EIJMP_EICALL (avr_current_arch->have_eijmp_eicall)
197 /* Handling of 8-bit SP versus 16-bit SP is as follows:
199 -msp8 is used internally to select the right multilib for targets with
200 8-bit SP. -msp8 is set automatically by DRIVER_SELF_SPECS for devices
201 with 8-bit SP or by multilib generation machinery. If a frame pointer is
202 needed and SP is only 8 bits wide, SP is zero-extended to get FP.
204 TARGET_TINY_STACK is triggered by -mtiny-stack which is a user option.
205 This option has no effect on multilib selection. It serves to save some
206 bytes on 16-bit SP devices by only changing SP_L and leaving SP_H alone.
208 These two properties are reflected by built-in macros __AVR_SP8__ resp.
209 __AVR_HAVE_8BIT_SP__ and __AVR_HAVE_16BIT_SP__. During multilib generation
210 there is always __AVR_SP8__ == __AVR_HAVE_8BIT_SP__. */
212 #define AVR_HAVE_8BIT_SP \
213 (avr_current_device->short_sp || TARGET_TINY_STACK || avr_sp8)
215 #define AVR_HAVE_SPH (!avr_sp8)
217 #define AVR_2_BYTE_PC (!AVR_HAVE_EIJMP_EICALL)
218 #define AVR_3_BYTE_PC (AVR_HAVE_EIJMP_EICALL)
220 #define AVR_XMEGA (avr_current_arch->xmega_p)
222 #define BITS_BIG_ENDIAN 0
223 #define BYTES_BIG_ENDIAN 0
224 #define WORDS_BIG_ENDIAN 0
227 /* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits). */
228 #define UNITS_PER_WORD 4
230 /* Width of a word, in units (bytes). */
231 #define UNITS_PER_WORD 1
234 #define POINTER_SIZE 16
237 /* Maximum sized of reasonable data type
238 DImode or Dfmode ... */
239 #define MAX_FIXED_MODE_SIZE 32
241 #define PARM_BOUNDARY 8
243 #define FUNCTION_BOUNDARY 8
245 #define EMPTY_FIELD_BOUNDARY 8
247 /* No data type wants to be aligned rounder than this. */
248 #define BIGGEST_ALIGNMENT 8
250 #define TARGET_VTABLE_ENTRY_ALIGN 8
252 #define STRICT_ALIGNMENT 0
254 #define INT_TYPE_SIZE (TARGET_INT8 ? 8 : 16)
255 #define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16)
256 #define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32)
257 #define LONG_LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 32 : 64)
258 #define FLOAT_TYPE_SIZE 32
259 #define DOUBLE_TYPE_SIZE 32
260 #define LONG_DOUBLE_TYPE_SIZE 32
262 #define DEFAULT_SIGNED_CHAR 1
264 #define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int")
265 #define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int")
267 #define WCHAR_TYPE_SIZE 16
269 #define FIRST_PSEUDO_REGISTER 36
271 #define FIXED_REGISTERS {\
289 1,1 /* arg pointer */ }
291 #define CALL_USED_REGISTERS { \
309 1,1 /* arg pointer */ }
311 #define REG_ALLOC_ORDER { \
319 17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2, \
324 #define ADJUST_REG_ALLOC_ORDER order_regs_for_local_alloc ()
327 #define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
329 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
331 #define MODES_TIEABLE_P(MODE1, MODE2) 1
336 POINTER_X_REGS, /* r26 - r27 */
337 POINTER_Y_REGS, /* r28 - r29 */
338 POINTER_Z_REGS, /* r30 - r31 */
339 STACK_REG, /* STACK */
340 BASE_POINTER_REGS, /* r28 - r31 */
341 POINTER_REGS, /* r26 - r31 */
342 ADDW_REGS, /* r24 - r31 */
343 SIMPLE_LD_REGS, /* r16 - r23 */
344 LD_REGS, /* r16 - r31 */
345 NO_LD_REGS, /* r0 - r15 */
346 GENERAL_REGS, /* r0 - r31 */
347 ALL_REGS, LIM_REG_CLASSES
351 #define N_REG_CLASSES (int)LIM_REG_CLASSES
353 #define REG_CLASS_NAMES { \
356 "POINTER_X_REGS", /* r26 - r27 */ \
357 "POINTER_Y_REGS", /* r28 - r29 */ \
358 "POINTER_Z_REGS", /* r30 - r31 */ \
359 "STACK_REG", /* STACK */ \
360 "BASE_POINTER_REGS", /* r28 - r31 */ \
361 "POINTER_REGS", /* r26 - r31 */ \
362 "ADDW_REGS", /* r24 - r31 */ \
363 "SIMPLE_LD_REGS", /* r16 - r23 */ \
364 "LD_REGS", /* r16 - r31 */ \
365 "NO_LD_REGS", /* r0 - r15 */ \
366 "GENERAL_REGS", /* r0 - r31 */ \
369 #define REG_CLASS_CONTENTS { \
370 {0x00000000,0x00000000}, /* NO_REGS */ \
371 {0x00000001,0x00000000}, /* R0_REG */ \
372 {3 << REG_X,0x00000000}, /* POINTER_X_REGS, r26 - r27 */ \
373 {3 << REG_Y,0x00000000}, /* POINTER_Y_REGS, r28 - r29 */ \
374 {3 << REG_Z,0x00000000}, /* POINTER_Z_REGS, r30 - r31 */ \
375 {0x00000000,0x00000003}, /* STACK_REG, STACK */ \
376 {(3 << REG_Y) | (3 << REG_Z), \
377 0x00000000}, /* BASE_POINTER_REGS, r28 - r31 */ \
378 {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z), \
379 0x00000000}, /* POINTER_REGS, r26 - r31 */ \
380 {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W), \
381 0x00000000}, /* ADDW_REGS, r24 - r31 */ \
382 {0x00ff0000,0x00000000}, /* SIMPLE_LD_REGS r16 - r23 */ \
383 {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16), \
384 0x00000000}, /* LD_REGS, r16 - r31 */ \
385 {0x0000ffff,0x00000000}, /* NO_LD_REGS r0 - r15 */ \
386 {0xffffffff,0x00000000}, /* GENERAL_REGS, r0 - r31 */ \
387 {0xffffffff,0x00000003} /* ALL_REGS */ \
390 #define REGNO_REG_CLASS(R) avr_regno_reg_class(R)
392 #define MODE_CODE_BASE_REG_CLASS(mode, as, outer_code, index_code) \
393 avr_mode_code_base_reg_class (mode, as, outer_code, index_code)
395 #define INDEX_REG_CLASS NO_REGS
397 #define REGNO_MODE_CODE_OK_FOR_BASE_P(num, mode, as, outer_code, index_code) \
398 avr_regno_mode_code_ok_for_base_p (num, mode, as, outer_code, index_code)
400 #define REGNO_OK_FOR_INDEX_P(NUM) 0
402 #define HARD_REGNO_CALL_PART_CLOBBERED(REGNO, MODE) \
403 avr_hard_regno_call_part_clobbered (REGNO, MODE)
405 #define TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P hook_bool_mode_true
407 #define STACK_PUSH_CODE POST_DEC
409 #define STACK_GROWS_DOWNWARD
411 #define STARTING_FRAME_OFFSET avr_starting_frame_offset()
413 #define STACK_POINTER_OFFSET 1
415 #define FIRST_PARM_OFFSET(FUNDECL) 0
417 #define STACK_BOUNDARY 8
419 #define STACK_POINTER_REGNUM 32
421 #define FRAME_POINTER_REGNUM REG_Y
423 #define ARG_POINTER_REGNUM 34
425 #define STATIC_CHAIN_REGNUM 2
427 #define ELIMINABLE_REGS { \
428 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
429 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM} \
430 ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
432 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
433 OFFSET = avr_initial_elimination_offset (FROM, TO)
435 #define RETURN_ADDR_RTX(count, tem) avr_return_addr_rtx (count, tem)
437 /* Don't use Push rounding. expr.c: emit_single_push_insn is broken
438 for POST_DEC targets (PR27386). */
439 /*#define PUSH_ROUNDING(NPUSHED) (NPUSHED)*/
441 typedef struct avr_args {
442 int nregs; /* # registers available for passing */
443 int regno; /* next available register number */
446 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
447 init_cumulative_args (&(CUM), FNTYPE, LIBNAME, FNDECL)
449 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)
451 #define DEFAULT_PCC_STRUCT_RETURN 0
453 #define EPILOGUE_USES(REGNO) avr_epilogue_uses(REGNO)
455 #define HAVE_POST_INCREMENT 1
456 #define HAVE_PRE_DECREMENT 1
458 #define MAX_REGS_PER_ADDRESS 1
460 #define LEGITIMIZE_RELOAD_ADDRESS(X,MODE,OPNUM,TYPE,IND_L,WIN) \
462 rtx new_x = avr_legitimize_reload_address (&(X), MODE, OPNUM, TYPE, \
464 IND_L, make_memloc); \
472 #define BRANCH_COST(speed_p, predictable_p) avr_branch_cost
474 #define SLOW_BYTE_ACCESS 0
476 #define NO_FUNCTION_CSE
478 #define REGISTER_TARGET_PRAGMAS() \
480 avr_register_target_pragmas(); \
483 #define TEXT_SECTION_ASM_OP "\t.text"
485 #define DATA_SECTION_ASM_OP "\t.data"
487 #define BSS_SECTION_ASM_OP "\t.section .bss"
489 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
490 There are no shared libraries on this target, and these sections are
491 placed in the read-only program memory, so they are not writable. */
493 #undef CTORS_SECTION_ASM_OP
494 #define CTORS_SECTION_ASM_OP "\t.section .ctors,\"a\",@progbits"
496 #undef DTORS_SECTION_ASM_OP
497 #define DTORS_SECTION_ASM_OP "\t.section .dtors,\"a\",@progbits"
499 #define TARGET_ASM_CONSTRUCTOR avr_asm_out_ctor
501 #define TARGET_ASM_DESTRUCTOR avr_asm_out_dtor
503 #define SUPPORTS_INIT_PRIORITY 0
505 #define JUMP_TABLES_IN_TEXT_SECTION 0
507 #define ASM_COMMENT_START " ; "
509 #define ASM_APP_ON "/* #APP */\n"
511 #define ASM_APP_OFF "/* #NOAPP */\n"
513 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C, STR) ((C) == '\n' || ((C) == '$'))
515 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(STREAM, DECL, NAME, SIZE, ALIGN) \
516 avr_asm_output_aligned_decl_common (STREAM, DECL, NAME, SIZE, ALIGN, false)
518 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
519 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
521 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(STREAM, DECL, NAME, SIZE, ALIGN) \
522 avr_asm_output_aligned_decl_common (STREAM, DECL, NAME, SIZE, ALIGN, true)
524 /* Globalizing directive for a label. */
525 #define GLOBAL_ASM_OP ".global\t"
527 #define SUPPORTS_WEAK 1
529 #define HAS_INIT_SECTION 1
531 #define REGISTER_NAMES { \
532 "r0","r1","r2","r3","r4","r5","r6","r7", \
533 "r8","r9","r10","r11","r12","r13","r14","r15", \
534 "r16","r17","r18","r19","r20","r21","r22","r23", \
535 "r24","r25","r26","r27","r28","r29","r30","r31", \
536 "__SP_L__","__SP_H__","argL","argH"}
538 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)
540 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
542 gcc_assert (REGNO < 32); \
543 fprintf (STREAM, "\tpush\tr%d", REGNO); \
546 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
548 gcc_assert (REGNO < 32); \
549 fprintf (STREAM, "\tpop\tr%d", REGNO); \
552 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
553 avr_output_addr_vec_elt(STREAM, VALUE)
555 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
558 fprintf (STREAM, "\t.p2align\t%d\n", POWER); \
561 #define CASE_VECTOR_MODE HImode
563 #undef WORD_REGISTER_OPERATIONS
567 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
571 #define FUNCTION_MODE HImode
573 #define DOLLARS_IN_IDENTIFIERS 0
575 #define TRAMPOLINE_SIZE 4
577 /* Store in cc_status the expressions
578 that the condition codes will describe
579 after execution of an instruction whose pattern is EXP.
580 Do not alter them if the instruction would not alter the cc's. */
582 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
584 /* The add insns don't set overflow in a usable way. */
585 #define CC_OVERFLOW_UNUSABLE 01000
586 /* The mov,and,or,xor insns don't set carry. That's ok though as the
587 Z bit is all we need when doing unsigned comparisons on the result of
588 these insns (since they're always with 0). However, conditions.h has
589 CC_NO_OVERFLOW defined for this purpose. Rename it to something more
591 #define CC_NO_CARRY CC_NO_OVERFLOW
594 /* Output assembler code to FILE to increment profiler label # LABELNO
595 for profiling a function entry. */
597 #define FUNCTION_PROFILER(FILE, LABELNO) \
598 fprintf (FILE, "/* profiler %d */", (LABELNO))
600 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
601 adjust_insn_length (INSN, LENGTH))
603 extern const char *avr_device_to_arch (int argc, const char **argv);
604 extern const char *avr_device_to_data_start (int argc, const char **argv);
605 extern const char *avr_device_to_startfiles (int argc, const char **argv);
606 extern const char *avr_device_to_devicelib (int argc, const char **argv);
607 extern const char *avr_device_to_sp8 (int argc, const char **argv);
609 #define EXTRA_SPEC_FUNCTIONS \
610 { "device_to_arch", avr_device_to_arch }, \
611 { "device_to_data_start", avr_device_to_data_start }, \
612 { "device_to_startfile", avr_device_to_startfiles }, \
613 { "device_to_devicelib", avr_device_to_devicelib }, \
614 { "device_to_sp8", avr_device_to_sp8 },
616 #define DRIVER_SELF_SPECS " %:device_to_sp8(%{mmcu=*:%*}) "
621 #define CC1PLUS_SPEC "%{!frtti:-fno-rtti} \
622 %{!fenforce-eh-specs:-fno-enforce-eh-specs} \
623 %{!fexceptions:-fno-exceptions}"
624 /* A C string constant that tells the GCC driver program options to
625 pass to `cc1plus'. */
627 #define ASM_SPEC "%{mmcu=avr25:-mmcu=avr2;mmcu=avr35:-mmcu=avr3;mmcu=avr31:-mmcu=avr3;mmcu=avr51:-mmcu=avr5;\
629 %{mmcu=*:%{!mmcu=avr2:%{!mmcu=at90s8515:%{!mmcu=avr31:%{!mmcu=atmega103:\
634 %{mpmem-wrap-around:%{mmcu=at90usb8*:--pmem-wrap-around=8k}\
635 %{mmcu=atmega16*:--pmem-wrap-around=16k}\
637 mmcu=at90can32*:--pmem-wrap-around=32k}\
640 mmcu=at90usb64*:--pmem-wrap-around=64k}}}\
641 %:device_to_arch(%{mmcu=*:%*})\
642 %:device_to_data_start(%{mmcu=*:%*})"
645 "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lc }}}}}"
647 #define LIBSTDCXX "gcc"
648 /* No libstdc++ for now. Empty string doesn't work. */
650 #define LIBGCC_SPEC \
651 "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lgcc }}}}}"
653 #define STARTFILE_SPEC "%:device_to_startfile(%{mmcu=*:%*})"
655 #define ENDFILE_SPEC ""
657 /* This is the default without any -mmcu=* option (AT90S*). */
658 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
660 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
661 TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
663 #define CR_TAB "\n\t"
665 #define DWARF2_ADDR_SIZE 4
667 #define INCOMING_RETURN_ADDR_RTX avr_incoming_return_addr_rtx ()
668 #define INCOMING_FRAME_SP_OFFSET (AVR_3_BYTE_PC ? 3 : 2)
670 /* The caller's stack pointer value immediately before the call
671 is one byte below the first argument. */
672 #define ARG_POINTER_CFA_OFFSET(FNDECL) -1
674 #define INCOMING_RETURN_ADDR_RTX avr_incoming_return_addr_rtx ()
675 #define INCOMING_FRAME_SP_OFFSET (AVR_3_BYTE_PC ? 3 : 2)
677 /* The caller's stack pointer value immediately before the call
678 is one byte below the first argument. */
679 #define ARG_POINTER_CFA_OFFSET(FNDECL) -1
681 #define HARD_REGNO_RENAME_OK(OLD_REG, NEW_REG) \
682 avr_hard_regno_rename_ok (OLD_REG, NEW_REG)
684 /* A C structure for machine-specific, per-function data.
685 This is added to the cfun structure. */
686 struct GTY(()) machine_function
688 /* 'true' - if current function is a naked function. */
691 /* 'true' - if current function is an interrupt function
692 as specified by the "interrupt" attribute. */
695 /* 'true' - if current function is a signal function
696 as specified by the "signal" attribute. */
699 /* 'true' - if current function is a 'task' function
700 as specified by the "OS_task" attribute. */
703 /* 'true' - if current function is a 'main' function
704 as specified by the "OS_main" attribute. */
707 /* Current function stack size. */
710 /* 'true' if a callee might be tail called */
713 /* 'true' if the above is_foo predicates are sanity-checked to avoid
714 multiple diagnose for the same function. */
715 int attributes_checked_p;
718 /* AVR does not round pushes, but the existance of this macro is
719 required in order for pushes to be generated. */
720 #define PUSH_ROUNDING(X) (X)
722 /* Define prototype here to avoid build warning. Some files using
723 ACCUMULATE_OUTGOING_ARGS (directly or indirectly) include
724 tm.h but not tm_p.h. */
725 extern int avr_accumulate_outgoing_args (void);
726 #define ACCUMULATE_OUTGOING_ARGS avr_accumulate_outgoing_args()
728 #define INIT_EXPANDERS avr_init_expanders()