1 /* Declarations for insn-output.c. These functions are defined in recog.c,
3 Copyright (C) 1987, 1991, 1994, 97-98, 1999 Free Software Foundation, Inc.
5 This file is part of GNU CC.
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)
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.
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
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* Initialize data in final at the beginning of a compilation. */
23 extern void init_final PROTO((const char *));
25 /* Called at end of source file,
26 to output the block-profiling table for this entire compilation. */
27 extern void end_final PROTO((const char *));
29 /* Enable APP processing of subsequent output.
30 Used before the output from an `asm' statement. */
31 extern void app_enable PROTO((void));
33 /* Disable APP processing of subsequent output.
34 Called from varasm.c before most kinds of output. */
35 extern void app_disable PROTO((void));
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));
42 /* Indicate that branch shortening hasn't yet been done. */
43 extern void init_insn_lengths PROTO((void));
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));
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));
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 PROTO((rtx, FILE *, int));
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 PROTO((rtx, FILE *, int));
66 /* Output assembler code for some insns: all or part of a function. */
67 extern void final PROTO((rtx, FILE *, int, int));
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
72 extern rtx final_scan_insn PROTO((rtx, FILE *, int, int, int));
74 /* Replace a SUBREG with a REG or a MEM, based on the thing it is a
76 extern rtx alter_subreg PROTO((rtx));
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((const char *));
82 /* Output a string of assembler code, substituting insn operands.
83 Defined in final.c. */
84 extern void output_asm_insn PROTO((const char *, rtx *));
86 /* Compute a worst-case reference address of a branch so that it
87 can be safely used in the presence of aligned labels.
88 Defined in final.c. */
89 extern int insn_current_reference_address PROTO((rtx));
91 /* Find the alignment associated with a CODE_LABEL.
92 Defined in final.c. */
93 extern int label_to_alignment PROTO((rtx));
95 /* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol. */
96 extern void output_asm_label PROTO((rtx));
98 /* Print a memory reference operand for address X
99 using machine-dependent assembler syntax. */
100 extern void output_address PROTO((rtx));
102 /* Print an integer constant expression in assembler syntax.
103 Addition and subtraction are the only arithmetic
104 that may appear in these expressions. */
105 extern void output_addr_const PROTO((FILE *, rtx));
107 /* Output a string of assembler code, substituting numbers, strings
108 and fixed syntactic prefixes. */
109 extern void asm_fprintf PVPROTO((FILE *file, const char *p, ...));
111 /* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single
113 extern void split_double PROTO((rtx, rtx *, rtx *));
115 /* Return nonzero if this function has no function calls. */
116 extern int leaf_function_p PROTO((void));
118 /* Return 1 if this function uses only the registers that can be
119 safely renumbered. */
120 extern int only_leaf_regs_used PROTO((void));
122 /* Scan IN_RTX and its subexpressions, and renumber all regs into those
123 available in leaf functions. */
124 extern void leaf_renumber_regs_insn PROTO((rtx));
126 /* Locate the proper template for the given insn-code. */
127 extern const char *get_insn_template PROTO((int, rtx));
129 /* Functions in flow.c */
130 extern void allocate_for_life_analysis PROTO((void));
131 extern int regno_uninitialized PROTO((int));
132 extern int regno_clobbered_at_setjmp PROTO((int));
133 extern void dump_flow_info PROTO((FILE *));
134 extern void find_basic_blocks PROTO((rtx, int, FILE *, int));
135 extern void free_basic_block_vars PROTO((int));
136 extern void set_block_num PROTO((rtx, int));
137 extern void life_analysis PROTO((rtx, int, FILE *, int));
140 /* Functions in varasm.c. */
142 /* Tell assembler to switch to text section. */
143 extern void text_section PROTO((void));
145 /* Tell assembler to switch to data section. */
146 extern void data_section PROTO((void));
148 /* Tell assembler to make sure its in the data section. */
149 extern void force_data_section PROTO((void));
151 /* Tell assembler to switch to read-only data section. This is normally
153 extern void readonly_data_section PROTO((void));
155 /* Determine if we're in the text section. */
156 extern int in_text_section PROTO((void));
158 #ifdef EH_FRAME_SECTION_ASM_OP
159 extern void eh_frame_section PROTO ((void));
163 /* Tell assembler to change to section NAME for DECL.
164 If DECL is NULL, just switch to section NAME.
165 If NAME is NULL, get the name from DECL.
166 If RELOC is 1, the initializer for DECL contains relocs. */
167 extern void named_section PROTO((tree, const char *, int));
169 /* Tell assembler to switch to the section for function DECL. */
170 extern void function_section PROTO((tree));
172 /* Tell assembler to switch to the section for the exception table. */
173 extern void exception_section PROTO((void));
175 /* Create the rtl to represent a function, for a function definition.
176 DECL is a FUNCTION_DECL node which describes which function.
177 The rtl is stored into DECL. */
178 extern void make_function_rtl PROTO((tree));
180 /* Declare DECL to be a weak symbol. */
181 extern void declare_weak PROTO ((tree));
182 #endif /* TREE_CODE */
184 /* Emit any pending weak declarations. */
185 extern void weak_finish PROTO ((void));
187 /* Decode an `asm' spec for a declaration as a register name.
188 Return the register number, or -1 if nothing specified,
189 or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
190 or -3 if ASMSPEC is `cc' and is not recognized,
191 or -4 if ASMSPEC is `memory' and is not recognized.
192 Accept an exact spelling or a decimal number.
193 Prefixes such as % are optional. */
194 extern int decode_reg_name PROTO((const char *));
197 /* Create the DECL_RTL for a declaration for a static or external variable
198 or static or external function.
199 ASMSPEC, if not 0, is the string which the user specified
200 as the assembler symbol name.
201 TOP_LEVEL is nonzero if this is a file-scope variable.
203 This is never called for PARM_DECL nodes. */
204 extern void make_decl_rtl PROTO((tree, const char *, int));
206 /* Make the rtl for variable VAR be volatile.
207 Use this only for static variables. */
208 extern void make_var_volatile PROTO((tree));
210 /* Output alignment directive to align for constant expression EXP. */
211 extern void assemble_constant_align PROTO((tree));
213 extern void assemble_alias PROTO((tree, tree));
215 /* Output a string of literal assembler code
216 for an `asm' keyword used between functions. */
217 extern void assemble_asm PROTO((tree));
219 /* Record an element in the table of global destructors.
220 How this is done depends on what sort of assembler and linker
223 NAME should be the name of a global function to be called
224 at exit time. This name is output using assemble_name. */
225 extern void assemble_destructor PROTO((char *));
227 /* Likewise for global constructors. */
228 extern void assemble_constructor PROTO((char *));
230 /* Likewise for entries we want to record for garbage collection.
231 Garbage collection is still under development. */
232 extern void assemble_gc_entry PROTO((char *));
234 /* Output assembler code for the constant pool of a function and associated
235 with defining the name of the function. DECL describes the function.
236 NAME is the function's name. For the constant pool, we use the current
237 constant pool data. */
238 extern void assemble_start_function PROTO((tree, char *));
240 /* Output assembler code associated with defining the size of the
241 function. DECL describes the function. NAME is the function's name. */
242 extern void assemble_end_function PROTO((tree, char *));
244 /* Assemble code to leave SIZE bytes of zeros. */
245 extern void assemble_zeros PROTO((int));
247 /* Assemble an alignment pseudo op for an ALIGN-bit boundary. */
248 extern void assemble_align PROTO((int));
250 /* Assemble a string constant with the specified C string as contents. */
251 extern void assemble_string PROTO((const char *, int));
252 /* Assemble everything that is needed for a variable or function declaration.
253 Not used for automatic variables, and not used for function definitions.
254 Should not be called for variables of incomplete structure type.
256 TOP_LEVEL is nonzero if this variable has file scope.
257 AT_END is nonzero if this is the special handling, at end of compilation,
258 to define things that have had only tentative definitions.
259 DONT_OUTPUT_DATA if nonzero means don't actually output the
260 initial value (that will be done by the caller). */
261 extern void assemble_variable PROTO((tree, int, int, int));
263 /* Output something to declare an external symbol to the assembler.
264 (Most assemblers don't need this, so we normally output nothing.)
265 Do nothing if DECL is not external. */
266 extern void assemble_external PROTO((tree));
267 #endif /* TREE_CODE */
270 /* Similar, for calling a library function FUN. */
271 extern void assemble_external_libcall PROTO((rtx));
274 /* Declare the label NAME global. */
275 extern void assemble_global PROTO((char *));
277 /* Assemble a label named NAME. */
278 extern void assemble_label PROTO((char *));
280 /* Output to FILE a reference to the assembler name of a C-level name NAME.
281 If NAME starts with a *, the rest of NAME is output verbatim.
282 Otherwise NAME is transformed in an implementation-defined way
283 (usually by the addition of an underscore).
284 Many macros in the tm file are defined to call this function. */
285 extern void assemble_name PROTO((FILE *, const char *));
288 /* Assemble the integer constant X into an object of SIZE bytes.
289 X must be either a CONST_INT or CONST_DOUBLE.
291 Return 1 if we were able to output the constant, otherwise 0. If FORCE is
292 non-zero, abort if we can't output the constant. */
293 extern int assemble_integer PROTO((rtx, int, int));
296 /* Assemble the floating-point constant D into an object of size MODE. */
297 extern void assemble_real PROTO((REAL_VALUE_TYPE,
302 /* At the end of a function, forget the memory-constants
303 previously made for CONST_DOUBLEs. Mark them as not on real_constant_chain.
304 Also clear out real_constant_chain and clear out all the chain-pointers. */
305 extern void clear_const_double_mem PROTO((void));
307 /* Start deferring output of subconstants. */
308 extern void defer_addressed_constants PROTO((void));
310 /* Stop deferring output of subconstants,
311 and output now all those that have been deferred. */
312 extern void output_deferred_addressed_constants PROTO((void));
314 /* Return the size of the constant pool. */
315 extern int get_pool_size PROTO((void));
318 /* Write all the constants in the constant pool. */
319 extern void output_constant_pool PROTO((char *, tree));
321 /* Output assembler code for constant EXP to FILE, with no label.
322 This includes the pseudo-op such as ".int" or ".byte", and a newline.
323 Assumes output_addressed_constants has been done on EXP already.
325 Generate exactly SIZE bytes of assembler data, padding at the end
326 with zeros if necessary. SIZE must always be specified. */
327 extern void output_constant PROTO((tree, int));
330 /* When outputting assembler code, indicates which alternative
331 of the constraints was actually satisfied. */
332 extern int which_alternative;
335 /* When outputting delayed branch sequences, this rtx holds the
336 sequence being output. It is null when no delayed branch
337 sequence is being output, so it can be used as a test in the
340 This variable is defined in final.c. */
341 extern rtx final_sequence;
344 /* Nonzero means generate position-independent code.
345 This is not fully implemented yet. */
349 /* The line number of the beginning of the current function.
350 sdbout.c needs this so that it can output relative linenumbers. */
352 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers. */
353 extern int sdb_begin_function_line;
356 /* File in which assembler code is being written. */
359 extern FILE *asm_out_file;
361 /* Nonzero if function being compiled doesn't contain any calls
362 (ignoring the prologue and epilogue). This is set prior to
363 local register allocation and is valid for the remaining
366 extern int current_function_is_leaf;
368 /* Nonzero if function being compiled doesn't modify the stack pointer
369 (ignoring the prologue and epilogue). This is only valid after
370 life_analysis has run. */
372 extern int current_function_sp_is_unchanging;
374 /* Nonzero if the function being compiled is a leaf function which only
375 uses leaf registers. This is valid after reload (specifically after
376 sched2) and is useful only if the port defines LEAF_REGISTERS. */
378 extern int current_function_uses_only_leaf_regs;
380 /* Default file in which to dump debug output. */
383 extern FILE *rtl_dump_file;
386 /* Decide whether DECL needs to be in a writable section. RELOC is the same
387 as for SELECT_SECTION. */
389 #define DECL_READONLY_SECTION(DECL,RELOC) \
390 (TREE_READONLY (DECL) \
391 && ! TREE_THIS_VOLATILE (DECL) \
392 && DECL_INITIAL (DECL) \
393 && (DECL_INITIAL (DECL) == error_mark_node \
394 || TREE_CONSTANT (DECL_INITIAL (DECL))) \
395 && ! (RELOC && (flag_pic || DECL_ONE_ONLY (DECL))))
397 /* User label prefix in effect for this compilation. */
398 extern const char *user_label_prefix;
400 /* This macro gets just the user-specified name
401 out of the string in a SYMBOL_REF. On most machines,
402 we discard the * if any and that's all. */
403 #ifndef STRIP_NAME_ENCODING
404 #define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \
405 (VAR) = ((SYMBOL_NAME) + ((SYMBOL_NAME)[0] == '*'))