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1.1 root 1: /* Declarations for insn-output.c. These functions are defined in recog.c,
2: final.c, and varasm.c.
1.1.1.5 root 3: Copyright (C) 1987, 1991, 1994 Free Software Foundation, Inc.
1.1 root 4:
5: This file is part of GNU CC.
6:
7: GNU CC is free software; you can redistribute it and/or modify
8: it under the terms of the GNU General Public License as published by
9: the Free Software Foundation; either version 2, or (at your option)
10: any later version.
11:
12: GNU CC is distributed in the hope that it will be useful,
13: but WITHOUT ANY WARRANTY; without even the implied warranty of
14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: GNU General Public License for more details.
16:
17: You should have received a copy of the GNU General Public License
18: along with GNU CC; see the file COPYING. If not, write to
1.1.1.6 ! root 19: the Free Software Foundation, 59 Temple Place - Suite 330,
! 20: Boston, MA 02111-1307, USA. */
1.1 root 21:
1.1.1.5 root 22: /* Initialize data in final at the beginning of a compilation. */
23: extern void init_final PROTO((char *));
24:
25: /* Called at end of source file,
26: to output the block-profiling table for this entire compilation. */
27: extern void end_final PROTO((char *));
28:
29: /* Enable APP processing of subsequent output.
30: Used before the output from an `asm' statement. */
31: extern void app_enable PROTO((void));
32:
33: /* Disable APP processing of subsequent output.
34: Called from varasm.c before most kinds of output. */
35: extern void app_disable PROTO((void));
36:
37: /* Return the number of slots filled in the current
38: delayed branch sequence (we don't count the insn needing the
39: delay slot). Zero if not in a delayed branch sequence. */
40: extern int dbr_sequence_length PROTO((void));
41:
42: /* Indicate that branch shortening hasn't yet been done. */
43: extern void init_insn_lengths PROTO((void));
44:
1.1.1.6 ! root 45: #ifdef RTX_CODE
1.1.1.5 root 46: /* Obtain the current length of an insn. If branch shortening has been done,
47: get its actual length. Otherwise, get its maximum length. */
48: extern int get_attr_length PROTO((rtx));
49:
50: /* Make a pass over all insns and compute their actual lengths by shortening
51: any branches of variable length if possible. */
52: extern void shorten_branches PROTO((rtx));
53:
54: /* Output assembler code for the start of a function,
55: and initialize some of the variables in this file
56: for the new function. The label for the function and associated
57: assembler pseudo-ops have already been output in
58: `assemble_start_function'. */
59: extern void final_start_function STDIO_PROTO((rtx, FILE *, int));
60:
61: /* Output assembler code for the end of a function.
62: For clarity, args are same as those of `final_start_function'
63: even though not all of them are needed. */
64: extern void final_end_function STDIO_PROTO((rtx, FILE *, int));
65:
66: /* Output assembler code for some insns: all or part of a function. */
67: extern void final STDIO_PROTO((rtx, FILE *, int, int));
68:
69: /* The final scan for one insn, INSN. Args are same as in `final', except
70: that INSN is the insn being scanned. Value returned is the next insn to
71: be scanned. */
72: extern rtx final_scan_insn STDIO_PROTO((rtx, FILE *, int, int, int));
73:
74: /* Replace a SUBREG with a REG or a MEM, based on the thing it is a
75: subreg of. */
76: extern rtx alter_subreg PROTO((rtx));
77:
78: /* Report inconsistency between the assembler template and the operands.
79: In an `asm', it's the user's fault; otherwise, the compiler's fault. */
80: extern void output_operand_lossage PROTO((char *));
1.1.1.4 root 81:
1.1 root 82: /* Output a string of assembler code, substituting insn operands.
83: Defined in final.c. */
1.1.1.5 root 84: extern void output_asm_insn PROTO((char *, rtx *));
1.1 root 85:
1.1.1.5 root 86: /* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol. */
87: extern void output_asm_label PROTO((rtx));
88:
89: /* Print a memory reference operand for address X
90: using machine-dependent assembler syntax. */
91: extern void output_address PROTO((rtx));
1.1 root 92:
1.1.1.3 root 93: /* Print an integer constant expression in assembler syntax.
94: Addition and subtraction are the only arithmetic
95: that may appear in these expressions. */
1.1.1.4 root 96: extern void output_addr_const STDIO_PROTO((FILE *, rtx));
1.1.1.3 root 97:
1.1.1.5 root 98: /* Output a string of assembler code, substituting numbers, strings
99: and fixed syntactic prefixes. */
100: extern void asm_fprintf STDIO_PROTO(PVPROTO((FILE *file,
101: char *p, ...)));
102:
103: /* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single
104: words. */
105: extern void split_double PROTO((rtx, rtx *, rtx *));
106:
107: /* Return nonzero if this function has no function calls. */
108: extern int leaf_function_p PROTO((void));
109:
110: /* Return 1 if this function uses only the registers that can be
111: safely renumbered. */
112: extern int only_leaf_regs_used PROTO((void));
113:
114: /* Scan IN_RTX and its subexpressions, and renumber all regs into those
115: available in leaf functions. */
116: extern void leaf_renumber_regs_insn PROTO((rtx));
1.1.1.6 ! root 117: #endif
! 118:
! 119: /* Functions in varasm.c. */
! 120:
! 121: /* Tell assembler to switch to text section. */
! 122: extern void text_section PROTO((void));
! 123:
! 124: /* Tell assembler to switch to data section. */
! 125: extern void data_section PROTO((void));
! 126:
! 127: /* Tell assembler to switch to read-only data section. This is normally
! 128: the text section. */
! 129: extern void readonly_data_section PROTO((void));
! 130:
! 131: /* Determine if we're in the text section. */
! 132: extern int in_text_section PROTO((void));
! 133:
! 134: #ifdef TREE_CODE
! 135: /* Tell assembler to change to section NAME for DECL.
! 136: If DECL is NULL, just switch to section NAME.
! 137: If NAME is NULL, get the name from DECL. */
! 138: extern void named_section PROTO((tree, char *));
! 139:
! 140: /* Tell assembler to switch to the section for function DECL. */
! 141: extern void function_section PROTO((tree));
! 142:
! 143: /* Create the rtl to represent a function, for a function definition.
! 144: DECL is a FUNCTION_DECL node which describes which function.
! 145: The rtl is stored into DECL. */
! 146: extern void make_function_rtl PROTO((tree));
! 147:
! 148: /* Decode an `asm' spec for a declaration as a register name.
! 149: Return the register number, or -1 if nothing specified,
! 150: or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
! 151: or -3 if ASMSPEC is `cc' and is not recognized,
! 152: or -4 if ASMSPEC is `memory' and is not recognized.
! 153: Accept an exact spelling or a decimal number.
! 154: Prefixes such as % are optional. */
! 155: extern int decode_reg_name PROTO((char *));
! 156:
! 157: /* Create the DECL_RTL for a declaration for a static or external variable
! 158: or static or external function.
! 159: ASMSPEC, if not 0, is the string which the user specified
! 160: as the assembler symbol name.
! 161: TOP_LEVEL is nonzero if this is a file-scope variable.
! 162:
! 163: This is never called for PARM_DECL nodes. */
! 164: extern void make_decl_rtl PROTO((tree, char *, int));
! 165:
! 166: /* Make the rtl for variable VAR be volatile.
! 167: Use this only for static variables. */
! 168: extern void make_var_volatile PROTO((tree));
! 169:
! 170: /* Output alignment directive to align for constant expression EXP. */
! 171: extern void assemble_constant_align PROTO((tree));
! 172:
! 173: /* Output a string of literal assembler code
! 174: for an `asm' keyword used between functions. */
! 175: extern void assemble_asm PROTO((tree));
! 176:
! 177: /* Record an element in the table of global destructors.
! 178: How this is done depends on what sort of assembler and linker
! 179: are in use.
! 180:
! 181: NAME should be the name of a global function to be called
! 182: at exit time. This name is output using assemble_name. */
! 183: extern void assemble_destructor PROTO((char *));
! 184:
! 185: /* Likewise for global constructors. */
! 186: extern void assemble_constructor PROTO((char *));
! 187:
! 188: /* Likewise for entries we want to record for garbage collection.
! 189: Garbage collection is still under development. */
! 190: extern void assemble_gc_entry PROTO((char *));
! 191:
! 192: /* Output assembler code for the constant pool of a function and associated
! 193: with defining the name of the function. DECL describes the function.
! 194: NAME is the function's name. For the constant pool, we use the current
! 195: constant pool data. */
! 196: extern void assemble_start_function PROTO((tree, char *));
! 197:
! 198: /* Output assembler code associated with defining the size of the
! 199: function. DECL describes the function. NAME is the function's name. */
! 200: extern void assemble_end_function PROTO((tree, char *));
! 201:
! 202: /* Assemble code to leave SIZE bytes of zeros. */
! 203: extern void assemble_zeros PROTO((int));
! 204:
! 205: /* Assemble an alignment pseudo op for an ALIGN-bit boundary. */
! 206: extern void assemble_align PROTO((int));
! 207:
! 208: /* Assemble a string constant with the specified C string as contents. */
! 209: extern void assemble_string PROTO((char *, int));
! 210: /* Assemble everything that is needed for a variable or function declaration.
! 211: Not used for automatic variables, and not used for function definitions.
! 212: Should not be called for variables of incomplete structure type.
! 213:
! 214: TOP_LEVEL is nonzero if this variable has file scope.
! 215: AT_END is nonzero if this is the special handling, at end of compilation,
! 216: to define things that have had only tentative definitions.
! 217: DONT_OUTPUT_DATA if nonzero means don't actually output the
! 218: initial value (that will be done by the caller). */
! 219: extern void assemble_variable PROTO((tree, int, int, int));
! 220:
! 221: /* Output text storage for constructor CONSTR. */
! 222: extern void bc_output_constructor PROTO((tree, int));
! 223:
! 224: /* Create storage for constructor CONSTR. */
! 225: extern void bc_output_data_constructor PROTO((tree));
! 226:
! 227: /* Output something to declare an external symbol to the assembler.
! 228: (Most assemblers don't need this, so we normally output nothing.)
! 229: Do nothing if DECL is not external. */
! 230: extern void assemble_external PROTO((tree));
! 231: #endif
! 232:
! 233: #ifdef RTX_CODE
! 234: /* Similar, for calling a library function FUN. */
! 235: extern void assemble_external_libcall PROTO((rtx));
! 236: #endif
! 237:
! 238: /* Declare the label NAME global. */
! 239: extern void assemble_global PROTO((char *));
1.1.1.5 root 240:
1.1.1.6 ! root 241: /* Assemble a label named NAME. */
! 242: extern void assemble_label PROTO((char *));
! 243:
! 244: /* Output to FILE a reference to the assembler name of a C-level name NAME.
! 245: If NAME starts with a *, the rest of NAME is output verbatim.
! 246: Otherwise NAME is transformed in an implementation-defined way
! 247: (usually by the addition of an underscore).
! 248: Many macros in the tm file are defined to call this function. */
! 249: extern void assemble_name STDIO_PROTO((FILE *, char *));
! 250:
! 251: #ifdef RTX_CODE
! 252: /* Assemble the integer constant X into an object of SIZE bytes.
! 253: X must be either a CONST_INT or CONST_DOUBLE.
! 254:
! 255: Return 1 if we were able to output the constant, otherwise 0. If FORCE is
! 256: non-zero, abort if we can't output the constant. */
! 257: extern int assemble_integer PROTO((rtx, int, int));
! 258:
! 259: #ifdef EMUSHORT
! 260: /* Assemble the floating-point constant D into an object of size MODE. */
! 261: extern void assemble_real PROTO((REAL_VALUE_TYPE,
! 262: enum machine_mode));
! 263: #endif
! 264: #endif
! 265:
! 266: /* At the end of a function, forget the memory-constants
! 267: previously made for CONST_DOUBLEs. Mark them as not on real_constant_chain.
! 268: Also clear out real_constant_chain and clear out all the chain-pointers. */
! 269: extern void clear_const_double_mem PROTO((void));
! 270:
! 271: /* Start deferring output of subconstants. */
! 272: extern void defer_addressed_constants PROTO((void));
! 273:
! 274: /* Stop deferring output of subconstants,
! 275: and output now all those that have been deferred. */
! 276: extern void output_deferred_addressed_constants PROTO((void));
! 277:
! 278: /* Initialize constant pool hashing for next function. */
! 279: extern void init_const_rtx_hash_table PROTO((void));
! 280:
! 281: /* Return the size of the constant pool. */
! 282: extern int get_pool_size PROTO((void));
! 283:
! 284: #ifdef TREE_CODE
! 285: /* Write all the constants in the constant pool. */
! 286: extern void output_constant_pool PROTO((char *, tree));
! 287:
! 288: /* Output assembler code for constant EXP to FILE, with no label.
! 289: This includes the pseudo-op such as ".int" or ".byte", and a newline.
! 290: Assumes output_addressed_constants has been done on EXP already.
! 291:
! 292: Generate exactly SIZE bytes of assembler data, padding at the end
! 293: with zeros if necessary. SIZE must always be specified. */
! 294: extern void output_constant PROTO((tree, int));
! 295: #endif
1.1.1.3 root 296:
1.1 root 297: /* When outputting assembler code, indicates which alternative
298: of the constraints was actually satisfied. */
299: extern int which_alternative;
300:
1.1.1.6 ! root 301: #ifdef RTX_CODE
1.1 root 302: /* When outputting delayed branch sequences, this rtx holds the
303: sequence being output. It is null when no delayed branch
304: sequence is being output, so it can be used as a test in the
305: insn output code.
306:
307: This variable is defined in final.c. */
308: extern rtx final_sequence;
1.1.1.6 ! root 309: #endif
1.1 root 310:
311: /* Number of bytes of args popped by function being compiled on its return.
312: Zero if no bytes are to be popped.
313: May affect compilation of return insn or of function epilogue. */
314:
315: extern int current_function_pops_args;
316:
317: /* Nonzero if function being compiled needs to be given an address
318: where the value should be stored. */
319:
320: extern int current_function_returns_struct;
321:
322: /* Nonzero if function being compiled needs to
323: return the address of where it has put a structure value. */
324:
325: extern int current_function_returns_pcc_struct;
326:
327: /* Nonzero if function being compiled needs to be passed a static chain. */
328:
329: extern int current_function_needs_context;
330:
331: /* Nonzero if function being compiled can call setjmp. */
332:
333: extern int current_function_calls_setjmp;
334:
335: /* Nonzero if function being compiled can call longjmp. */
336:
337: extern int current_function_calls_longjmp;
338:
339: /* Nonzero if function being compiled can call alloca,
340: either as a subroutine or builtin. */
341:
342: extern int current_function_calls_alloca;
343:
344: /* Nonzero if function being compiled receives nonlocal gotos
345: from nested functions. */
346:
347: extern int current_function_has_nonlocal_label;
348:
349: /* Nonzero if function being compiled contains nested functions. */
350:
351: extern int current_function_contains_functions;
352:
353: /* Nonzero if the current function returns a pointer type */
354:
355: extern int current_function_returns_pointer;
356:
357: /* If function's args have a fixed size, this is that size, in bytes.
358: Otherwise, it is -1.
359: May affect compilation of return insn or of function epilogue. */
360:
361: extern int current_function_args_size;
362:
363: /* # bytes the prologue should push and pretend that the caller pushed them.
364: The prologue must do this, but only if parms can be passed in registers. */
365:
366: extern int current_function_pretend_args_size;
367:
368: /* # of bytes of outgoing arguments required to be pushed by the prologue.
369: If this is non-zero, it means that ACCUMULATE_OUTGOING_ARGS was defined
370: and no stack adjusts will be done on function calls. */
371:
372: extern int current_function_outgoing_args_size;
373:
374: /* Nonzero if current function uses varargs.h or equivalent.
375: Zero for functions that use stdarg.h. */
376:
377: extern int current_function_varargs;
378:
1.1.1.6 ! root 379: /* Nonzero if current function uses stdarg.h or equivalent.
! 380: Zero for functions that use varargs.h. */
! 381:
! 382: extern int current_function_stdarg;
! 383:
1.1 root 384: /* Quantities of various kinds of registers
385: used for the current function's args. */
386:
387: extern CUMULATIVE_ARGS current_function_args_info;
388:
389: /* Name of function now being compiled. */
390:
391: extern char *current_function_name;
392:
1.1.1.6 ! root 393: #ifdef RTX_CODE
1.1 root 394: /* If non-zero, an RTL expression for that location at which the current
395: function returns its result. Usually equal to
396: DECL_RTL (DECL_RESULT (current_function_decl)). */
397:
398: extern rtx current_function_return_rtx;
399:
400: /* If some insns can be deferred to the delay slots of the epilogue, the
401: delay list for them is recorded here. */
402:
403: extern rtx current_function_epilogue_delay_list;
1.1.1.6 ! root 404: #endif
1.1 root 405:
406: /* Nonzero means generate position-independent code.
407: This is not fully implemented yet. */
408:
409: extern int flag_pic;
410:
411: /* This is nonzero if the current function uses pic_offset_table_rtx. */
412: extern int current_function_uses_pic_offset_table;
413:
1.1.1.2 root 414: /* This is nonzero if the current function uses the constant pool. */
415: extern int current_function_uses_const_pool;
416:
1.1 root 417: /* The line number of the beginning of the current function.
418: sdbout.c needs this so that it can output relative linenumbers. */
419:
420: #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers. */
421: extern int sdb_begin_function_line;
422: #endif
423:
424: /* File in which assembler code is being written. */
425:
1.1.1.4 root 426: #ifdef BUFSIZ
1.1 root 427: extern FILE *asm_out_file;
428: #endif
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