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- /* Declarations for insn-output.c. These functions are defined in recog.c,
- final.c, and varasm.c.
- Copyright (C) 1987, 1991, 1994 Free Software Foundation, Inc.
-
- This file is part of GNU CC.
-
- GNU CC is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU CC is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
- /* Initialize data in final at the beginning of a compilation. */
- extern void init_final PROTO((char *));
-
- /* Called at end of source file,
- to output the block-profiling table for this entire compilation. */
- extern void end_final PROTO((char *));
-
- /* Enable APP processing of subsequent output.
- Used before the output from an `asm' statement. */
- extern void app_enable PROTO((void));
-
- /* Disable APP processing of subsequent output.
- Called from varasm.c before most kinds of output. */
- extern void app_disable PROTO((void));
-
- /* Return the number of slots filled in the current
- delayed branch sequence (we don't count the insn needing the
- delay slot). Zero if not in a delayed branch sequence. */
- extern int dbr_sequence_length PROTO((void));
-
- /* Indicate that branch shortening hasn't yet been done. */
- extern void init_insn_lengths PROTO((void));
-
- #ifdef RTX_CODE
- /* Obtain the current length of an insn. If branch shortening has been done,
- get its actual length. Otherwise, get its maximum length. */
- extern int get_attr_length PROTO((rtx));
-
- /* Make a pass over all insns and compute their actual lengths by shortening
- any branches of variable length if possible. */
- extern void shorten_branches PROTO((rtx));
-
- /* Output assembler code for the start of a function,
- and initialize some of the variables in this file
- for the new function. The label for the function and associated
- assembler pseudo-ops have already been output in
- `assemble_start_function'. */
- extern void final_start_function STDIO_PROTO((rtx, FILE *, int));
-
- /* Output assembler code for the end of a function.
- For clarity, args are same as those of `final_start_function'
- even though not all of them are needed. */
- extern void final_end_function STDIO_PROTO((rtx, FILE *, int));
-
- /* Output assembler code for some insns: all or part of a function. */
- extern void final STDIO_PROTO((rtx, FILE *, int, int));
-
- /* The final scan for one insn, INSN. Args are same as in `final', except
- that INSN is the insn being scanned. Value returned is the next insn to
- be scanned. */
- extern rtx final_scan_insn STDIO_PROTO((rtx, FILE *, int, int, int));
-
- /* Replace a SUBREG with a REG or a MEM, based on the thing it is a
- subreg of. */
- extern rtx alter_subreg PROTO((rtx));
-
- /* Report inconsistency between the assembler template and the operands.
- In an `asm', it's the user's fault; otherwise, the compiler's fault. */
- extern void output_operand_lossage PROTO((char *));
-
- /* Output a string of assembler code, substituting insn operands.
- Defined in final.c. */
- extern void output_asm_insn PROTO((char *, rtx *));
-
- /* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol. */
- extern void output_asm_label PROTO((rtx));
-
- /* Print a memory reference operand for address X
- using machine-dependent assembler syntax. */
- extern void output_address PROTO((rtx));
-
- /* Print an integer constant expression in assembler syntax.
- Addition and subtraction are the only arithmetic
- that may appear in these expressions. */
- extern void output_addr_const STDIO_PROTO((FILE *, rtx));
-
- /* Output a string of assembler code, substituting numbers, strings
- and fixed syntactic prefixes. */
- extern void asm_fprintf STDIO_PROTO(PVPROTO((FILE *file,
- char *p, ...)));
-
- /* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single
- words. */
- extern void split_double PROTO((rtx, rtx *, rtx *));
-
- /* Return nonzero if this function has no function calls. */
- extern int leaf_function_p PROTO((void));
-
- /* Return 1 if this function uses only the registers that can be
- safely renumbered. */
- extern int only_leaf_regs_used PROTO((void));
-
- /* Scan IN_RTX and its subexpressions, and renumber all regs into those
- available in leaf functions. */
- extern void leaf_renumber_regs_insn PROTO((rtx));
- #endif
-
- /* Functions in varasm.c. */
-
- /* Tell assembler to switch to text section. */
- extern void text_section PROTO((void));
-
- /* Tell assembler to switch to data section. */
- extern void data_section PROTO((void));
-
- /* Tell assembler to switch to read-only data section. This is normally
- the text section. */
- extern void readonly_data_section PROTO((void));
-
- /* Determine if we're in the text section. */
- extern int in_text_section PROTO((void));
-
- #ifdef TREE_CODE
- /* Tell assembler to change to section NAME for DECL.
- If DECL is NULL, just switch to section NAME.
- If NAME is NULL, get the name from DECL. */
- extern void named_section PROTO((tree, char *));
-
- /* Tell assembler to switch to the section for function DECL. */
- extern void function_section PROTO((tree));
-
- /* Create the rtl to represent a function, for a function definition.
- DECL is a FUNCTION_DECL node which describes which function.
- The rtl is stored into DECL. */
- extern void make_function_rtl PROTO((tree));
-
- /* Decode an `asm' spec for a declaration as a register name.
- Return the register number, or -1 if nothing specified,
- or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
- or -3 if ASMSPEC is `cc' and is not recognized,
- or -4 if ASMSPEC is `memory' and is not recognized.
- Accept an exact spelling or a decimal number.
- Prefixes such as % are optional. */
- extern int decode_reg_name PROTO((char *));
-
- /* Create the DECL_RTL for a declaration for a static or external variable
- or static or external function.
- ASMSPEC, if not 0, is the string which the user specified
- as the assembler symbol name.
- TOP_LEVEL is nonzero if this is a file-scope variable.
-
- This is never called for PARM_DECL nodes. */
- extern void make_decl_rtl PROTO((tree, char *, int));
-
- /* Make the rtl for variable VAR be volatile.
- Use this only for static variables. */
- extern void make_var_volatile PROTO((tree));
-
- /* Output alignment directive to align for constant expression EXP. */
- extern void assemble_constant_align PROTO((tree));
-
- /* Output a string of literal assembler code
- for an `asm' keyword used between functions. */
- extern void assemble_asm PROTO((tree));
-
- /* Record an element in the table of global destructors.
- How this is done depends on what sort of assembler and linker
- are in use.
-
- NAME should be the name of a global function to be called
- at exit time. This name is output using assemble_name. */
- extern void assemble_destructor PROTO((char *));
-
- /* Likewise for global constructors. */
- extern void assemble_constructor PROTO((char *));
-
- /* Likewise for entries we want to record for garbage collection.
- Garbage collection is still under development. */
- extern void assemble_gc_entry PROTO((char *));
-
- /* Output assembler code for the constant pool of a function and associated
- with defining the name of the function. DECL describes the function.
- NAME is the function's name. For the constant pool, we use the current
- constant pool data. */
- extern void assemble_start_function PROTO((tree, char *));
-
- /* Output assembler code associated with defining the size of the
- function. DECL describes the function. NAME is the function's name. */
- extern void assemble_end_function PROTO((tree, char *));
-
- /* Assemble code to leave SIZE bytes of zeros. */
- extern void assemble_zeros PROTO((int));
-
- /* Assemble an alignment pseudo op for an ALIGN-bit boundary. */
- extern void assemble_align PROTO((int));
-
- /* Assemble a string constant with the specified C string as contents. */
- extern void assemble_string PROTO((char *, int));
- /* Assemble everything that is needed for a variable or function declaration.
- Not used for automatic variables, and not used for function definitions.
- Should not be called for variables of incomplete structure type.
-
- TOP_LEVEL is nonzero if this variable has file scope.
- AT_END is nonzero if this is the special handling, at end of compilation,
- to define things that have had only tentative definitions.
- DONT_OUTPUT_DATA if nonzero means don't actually output the
- initial value (that will be done by the caller). */
- extern void assemble_variable PROTO((tree, int, int, int));
-
- /* Output text storage for constructor CONSTR. */
- extern void bc_output_constructor PROTO((tree, int));
-
- /* Create storage for constructor CONSTR. */
- extern void bc_output_data_constructor PROTO((tree));
-
- /* Output something to declare an external symbol to the assembler.
- (Most assemblers don't need this, so we normally output nothing.)
- Do nothing if DECL is not external. */
- extern void assemble_external PROTO((tree));
- #endif
-
- #ifdef RTX_CODE
- /* Similar, for calling a library function FUN. */
- extern void assemble_external_libcall PROTO((rtx));
- #endif
-
- /* Declare the label NAME global. */
- extern void assemble_global PROTO((char *));
-
- /* Assemble a label named NAME. */
- extern void assemble_label PROTO((char *));
-
- /* Output to FILE a reference to the assembler name of a C-level name NAME.
- If NAME starts with a *, the rest of NAME is output verbatim.
- Otherwise NAME is transformed in an implementation-defined way
- (usually by the addition of an underscore).
- Many macros in the tm file are defined to call this function. */
- extern void assemble_name STDIO_PROTO((FILE *, char *));
-
- #ifdef RTX_CODE
- /* Assemble the integer constant X into an object of SIZE bytes.
- X must be either a CONST_INT or CONST_DOUBLE.
-
- Return 1 if we were able to output the constant, otherwise 0. If FORCE is
- non-zero, abort if we can't output the constant. */
- extern int assemble_integer PROTO((rtx, int, int));
-
- #ifdef EMUSHORT
- /* Assemble the floating-point constant D into an object of size MODE. */
- extern void assemble_real PROTO((REAL_VALUE_TYPE,
- enum machine_mode));
- #endif
- #endif
-
- /* At the end of a function, forget the memory-constants
- previously made for CONST_DOUBLEs. Mark them as not on real_constant_chain.
- Also clear out real_constant_chain and clear out all the chain-pointers. */
- extern void clear_const_double_mem PROTO((void));
-
- /* Start deferring output of subconstants. */
- extern void defer_addressed_constants PROTO((void));
-
- /* Stop deferring output of subconstants,
- and output now all those that have been deferred. */
- extern void output_deferred_addressed_constants PROTO((void));
-
- /* Initialize constant pool hashing for next function. */
- extern void init_const_rtx_hash_table PROTO((void));
-
- /* Return the size of the constant pool. */
- extern int get_pool_size PROTO((void));
-
- #ifdef TREE_CODE
- /* Write all the constants in the constant pool. */
- extern void output_constant_pool PROTO((char *, tree));
-
- /* Output assembler code for constant EXP to FILE, with no label.
- This includes the pseudo-op such as ".int" or ".byte", and a newline.
- Assumes output_addressed_constants has been done on EXP already.
-
- Generate exactly SIZE bytes of assembler data, padding at the end
- with zeros if necessary. SIZE must always be specified. */
- extern void output_constant PROTO((tree, int));
- #endif
-
- /* When outputting assembler code, indicates which alternative
- of the constraints was actually satisfied. */
- extern int which_alternative;
-
- #ifdef RTX_CODE
- /* When outputting delayed branch sequences, this rtx holds the
- sequence being output. It is null when no delayed branch
- sequence is being output, so it can be used as a test in the
- insn output code.
-
- This variable is defined in final.c. */
- extern rtx final_sequence;
- #endif
-
- /* Number of bytes of args popped by function being compiled on its return.
- Zero if no bytes are to be popped.
- May affect compilation of return insn or of function epilogue. */
-
- extern int current_function_pops_args;
-
- /* Nonzero if function being compiled needs to be given an address
- where the value should be stored. */
-
- extern int current_function_returns_struct;
-
- /* Nonzero if function being compiled needs to
- return the address of where it has put a structure value. */
-
- extern int current_function_returns_pcc_struct;
-
- /* Nonzero if function being compiled needs to be passed a static chain. */
-
- extern int current_function_needs_context;
-
- /* Nonzero if function being compiled can call setjmp. */
-
- extern int current_function_calls_setjmp;
-
- /* Nonzero if function being compiled can call longjmp. */
-
- extern int current_function_calls_longjmp;
-
- /* Nonzero if function being compiled can call alloca,
- either as a subroutine or builtin. */
-
- extern int current_function_calls_alloca;
-
- /* Nonzero if function being compiled receives nonlocal gotos
- from nested functions. */
-
- extern int current_function_has_nonlocal_label;
-
- /* Nonzero if function being compiled contains nested functions. */
-
- extern int current_function_contains_functions;
-
- /* Nonzero if the current function returns a pointer type */
-
- extern int current_function_returns_pointer;
-
- /* If function's args have a fixed size, this is that size, in bytes.
- Otherwise, it is -1.
- May affect compilation of return insn or of function epilogue. */
-
- extern int current_function_args_size;
-
- /* # bytes the prologue should push and pretend that the caller pushed them.
- The prologue must do this, but only if parms can be passed in registers. */
-
- extern int current_function_pretend_args_size;
-
- /* # of bytes of outgoing arguments required to be pushed by the prologue.
- If this is non-zero, it means that ACCUMULATE_OUTGOING_ARGS was defined
- and no stack adjusts will be done on function calls. */
-
- extern int current_function_outgoing_args_size;
-
- /* Nonzero if current function uses varargs.h or equivalent.
- Zero for functions that use stdarg.h. */
-
- extern int current_function_varargs;
-
- /* Nonzero if current function uses stdarg.h or equivalent.
- Zero for functions that use varargs.h. */
-
- extern int current_function_stdarg;
-
- /* Quantities of various kinds of registers
- used for the current function's args. */
-
- extern CUMULATIVE_ARGS current_function_args_info;
-
- /* Name of function now being compiled. */
-
- extern char *current_function_name;
-
- #ifdef RTX_CODE
- /* If non-zero, an RTL expression for that location at which the current
- function returns its result. Usually equal to
- DECL_RTL (DECL_RESULT (current_function_decl)). */
-
- extern rtx current_function_return_rtx;
-
- /* If some insns can be deferred to the delay slots of the epilogue, the
- delay list for them is recorded here. */
-
- extern rtx current_function_epilogue_delay_list;
- #endif
-
- /* Nonzero means generate position-independent code.
- This is not fully implemented yet. */
-
- extern int flag_pic;
-
- /* This is nonzero if the current function uses pic_offset_table_rtx. */
- extern int current_function_uses_pic_offset_table;
-
- /* This is nonzero if the current function uses the constant pool. */
- extern int current_function_uses_const_pool;
-
- /* The line number of the beginning of the current function.
- sdbout.c needs this so that it can output relative linenumbers. */
-
- #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers. */
- extern int sdb_begin_function_line;
- #endif
-
- /* File in which assembler code is being written. */
-
- #ifdef BUFSIZ
- extern FILE *asm_out_file;
- #endif
-