451 lines
16 KiB
C
451 lines
16 KiB
C
/* Declarations for insn-output.c. These functions are defined in recog.c,
|
|
final.c, and varasm.c.
|
|
Copyright (C) 1987, 1991, 1994, 1997 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));
|
|
|
|
/* Functions in flow.c */
|
|
extern void allocate_for_life_analysis PROTO((void));
|
|
extern int regno_uninitialized PROTO((int));
|
|
extern int regno_clobbered_at_setjmp PROTO((int));
|
|
extern void dump_flow_info STDIO_PROTO((FILE *));
|
|
extern void flow_analysis STDIO_PROTO((rtx, int, FILE *));
|
|
#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.
|
|
If RELOC is 1, the initializer for DECL contains relocs. */
|
|
extern void named_section PROTO((tree, char *, int));
|
|
|
|
/* Tell assembler to switch to the section for function DECL. */
|
|
extern void function_section PROTO((tree));
|
|
|
|
/* Tell assembler to switch to the section for the exception table. */
|
|
extern void exception_section PROTO((void));
|
|
|
|
/* 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
|
|
|
|
/* Decide whether DECL needs to be in a writable section. RELOC is the same
|
|
as for SELECT_SECTION. */
|
|
|
|
#define DECL_READONLY_SECTION(DECL,RELOC) \
|
|
(TREE_READONLY (DECL) \
|
|
&& ! TREE_THIS_VOLATILE (DECL) \
|
|
&& DECL_INITIAL (DECL) \
|
|
&& (DECL_INITIAL (DECL) == error_mark_node \
|
|
|| TREE_CONSTANT (DECL_INITIAL (DECL))) \
|
|
&& ! (RELOC && (flag_pic || DECL_ONE_ONLY (DECL))))
|