* This code is derived from software copyrighted by the Free Software
* Modified 1991 by Donn Seeley at UUNET Technologies, Inc.
static char sccsid
[] = "@(#)toplev.c 6.4 (Berkeley) 5/8/91";
/* Top level of GNU C compiler
Copyright (C) 1987, 1988, 1989 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 1, or (at your option)
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, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* This is the top level of cc1.
It parses command args, opens files, invokes the various passes
in the proper order, and counts the time used by each.
Error messages and low-level interface to malloc also handled here. */
/* This is for hpux. It is a real screw. They should change hpux. */
#include <time.h> /* Correct for hpux at least. Is it good on other USG? */
#undef FFS /* Some systems define this in param.h. */
#include <sys/resource.h>
extern int reload_completed
;
extern int rtx_equal_function_value_matters
;
extern void init_decl_processing ();
extern void init_tree ();
extern void init_optabs ();
extern void init_reg_sets ();
extern void dump_flow_info ();
extern void dump_local_alloc ();
void rest_of_decl_compilation ();
void error_with_file_and_line ();
void set_target_switch ();
void print_target_switch_defaults ();
/* Bit flags that specify the machine subtype we are compiling for.
Bits are tested using macros TARGET_... defined in the tm-...h file
and set by `-m...' switches. */
/* Name of current original source file (what was input to cpp).
This comes from each #-command in the actual input. */
/* Name of top-level original source file (what was input to cpp).
This comes from the #-command at the beginning of the actual input.
If there isn't any there, then this is the cc1 input file name. */
char *main_input_filename
;
/* Current line number in real source file. */
/* Stack of currently pending input files. */
struct file_stack
*input_file_stack
;
/* Incremented on each change to input_file_stack. */
int input_file_stack_tick
;
/* FUNCTION_DECL for function now being parsed or compiled. */
extern tree current_function_decl
;
/* Name to use as base of names for dump output files. */
/* Flags saying which kinds of debugging dump have been requested. */
int rtl_dump_and_exit
= 0;
/* 1 => write gdb debugging output (using symout.c). -g
2 => write dbx debugging output (using dbxout.c). -G
3 => write sdb debugging output (using sdbout.c). -g. */
enum debugger write_symbols
= NO_DEBUG
;
/* Nonzero means can use our own extensions to DBX format.
Relevant only with write_symbols == DBX_DEBUG. */
int use_gdb_dbx_extensions
;
/* Nonzero means do optimizations. -opt. */
/* Nonzero means `char' should be signed. */
/* Nonzero means give an enum type only as many bytes as it needs. */
/* Nonzero for -fcaller-saves: allocate values in regs that need to
be saved across function calls, if that produces overall better code.
Optional now, so people can test it. */
#ifdef DEFAULT_CALLER_SAVES
int flag_caller_saves
= 1;
int flag_caller_saves
= 0;
/* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
int flag_pcc_struct_return
= 0;
/* Nonzero for -fforce-mem: load memory value into a register
before arithmetic on it. This makes better cse but slower compilation. */
/* Nonzero for -fforce-addr: load memory address into a register before
reference to memory. This makes better cse but slower compilation. */
/* Nonzero for -fdefer-pop: don't pop args after each function call;
instead save them up to pop many calls' args with one insns. */
/* Nonzero for -ffloat-store: don't allocate floats and doubles
in extended-precision registers. */
int flag_float_store
= 0;
/* Nonzero for -fcombine-regs:
allow instruction combiner to combine an insn
that just copies one reg to another. */
int flag_combine_regs
= 0;
/* Nonzero enables strength-reduction in loop.c. */
int flag_strength_reduce
= 0;
/* Nonzero for -fwritable-strings:
store string constants in data segment and don't uniquize them. */
int flag_writable_strings
= 0;
/* Nonzero means don't put addresses of constant functions in registers.
Used for compiling the Unix kernel, where strange substitutions are
done on the assembly output. */
int flag_no_function_cse
= 0;
/* Nonzero for -fomit-frame-pointer:
don't make a frame pointer in simple functions that don't require one. */
int flag_omit_frame_pointer
= 0;
/* Nonzero to inhibit use of define_optimization peephole opts. */
int flag_no_peephole
= 0;
/* Nonzero means all references through pointers are volatile. */
/* Nonzero means just do syntax checking; don't output anything. */
int flag_syntax_only
= 0;
/* Nonzero means do stupid register allocation. -noreg.
This and `optimize' are controlled by different switches in cc1,
but normally cc controls them both with the -O switch. */
/* Don't print functions as they are compiled and don't print
times taken by the various passes. -quiet. */
/* Don't print warning messages. -w. */
int inhibit_warnings
= 0;
/* Do print extra warnings (such as for uninitialized variables). -W. */
/* Nonzero to warn about unused local variables. */
/* Nonzero means warn about all declarations which shadow others. */
/* Warn if a switch on an enum fails to have a case for every enum value. */
/* Nonzero means warn about any identifiers that match in the first N
characters. The value N is in `id_clash_len'. */
/* Number of error messages and warning messages so far. */
/* Name of program invoked, sans directories. */
/* Nonzero if generating code to do profiling. */
/* Nonzero if generating code to do profiling on a line-by-line basis. */
/* Nonzero for -pedantic switch: warn about anything
that standard spec forbids. */
/* Nonzero for -finline-functions: ok to inline functions that look like
good inline candidates. */
int flag_inline_functions
;
/* Nonzero for -fkeep-inline-functions: even if we make a function
go inline everywhere, keep its defintion around for debugging
int flag_keep_inline_functions
;
/* Nonzero means make the text shared if supported. */
/* Nonzero means schedule into delayed branch slots if supported. */
/* Copy of arguments to main. */
/* Name for output file of assembly code, specified with -o. */
/* Name for output file of GDB symbol segment, specified with -symout. */
/* Table of language-independent -f options.
STRING is the option name. VARIABLE is the address of the variable.
ON_VALUE is the value to store in VARIABLE
if `-fSTRING' is seen as an option.
(If `-fno-STRING' is seen as an option, the opposite value is stored.) */
struct { char *string
; int *variable
; int on_value
;} f_options
[] =
{"float-store", &flag_float_store
, 1},
{"volatile", &flag_volatile
, 1},
{"defer-pop", &flag_defer_pop
, 1},
{"omit-frame-pointer", &flag_omit_frame_pointer
, 1},
{"strength-reduce", &flag_strength_reduce
, 1},
{"writable-strings", &flag_writable_strings
, 1},
{"peephole", &flag_no_peephole
, 0},
{"force-mem", &flag_force_mem
, 1},
{"force-addr", &flag_force_addr
, 1},
{"combine-regs", &flag_combine_regs
, 1},
{"function-cse", &flag_no_function_cse
, 0},
{"inline-functions", &flag_inline_functions
, 1},
{"keep-inline-functions", &flag_keep_inline_functions
, 1},
{"syntax-only", &flag_syntax_only
, 1},
{"shared-data", &flag_shared_data
, 1},
{"caller-saves", &flag_caller_saves
, 1},
{"pcc-struct-return", &flag_pcc_struct_return
, 1},
{"delayed-branch", &flag_delayed_branch
, 1}
/* Output files for assembler code (real compiler output)
FILE *jump_opt_dump_file
;
FILE *local_reg_dump_file
;
FILE *global_reg_dump_file
;
FILE *jump2_opt_dump_file
;
FILE *dbr_sched_dump_file
;
/* Time accumulators, to count the total time spent in various passes. */
/* Return time used so far, in microseconds. */
return (tms
.tms_utime
+ tms
.tms_stime
) * (1000000 / HZ
);
return (rusage
.ru_utime
.tv_sec
* 1000000 + rusage
.ru_utime
.tv_usec
+ rusage
.ru_stime
.tv_sec
* 1000000 + rusage
.ru_stime
.tv_usec
);
return (vms_times
.proc_user_time
+ vms_times
.proc_system_time
) * 10000;
#define TIMEVAR(VAR, BODY) \
do { int otime = gettime (); BODY; VAR += gettime () - otime; } while (0)
str
, total
/ 1000000, total
% 1000000);
/* Count an error or warning. Return 1 if the message should be printed. */
if (warningp
&& inhibit_warnings
)
/* Print a fatal error message. NAME is the text.
Also include a system error message based on `errno'. */
fprintf (stderr
, "%s: ", progname
);
fprintf (stderr
, "%s: %s: I/O error\n", progname
, name
);
/* Called from insn-extract to give a better error message when we
don't have an insn to match what we are looking for, rather
than just calling abort(). */
fatal_insn_not_found (insn
)
error ("The following insn was not recognizable:", 0);
static int need_error_newline
;
/* Function of last error message;
more generally, function such that if next error message is in it
then we don't have to mention the function name. */
static tree last_error_function
= NULL
;
/* Used to detect when input_file_stack has changed since last described. */
static int last_error_tick
;
/* Called when the start of a function definition is parsed,
this function prints on stderr the name of the function. */
fprintf (stderr
, " %s", DECL_PRINT_NAME (decl
));
last_error_function
= current_function_decl
;
/* Prints out, if necessary, the name of the current function
which caused an error. Called from all error and warning functions. */
report_error_function (file
)
if (last_error_function
!= current_function_decl
)
fprintf (stderr
, "%s: ", file
);
if (current_function_decl
== NULL
)
fprintf (stderr
, "At top level:\n");
else if (TREE_CODE (TREE_TYPE (current_function_decl
)) == METHOD_TYPE
)
fprintf (stderr
, "In method %s:\n",
DECL_PRINT_NAME (current_function_decl
));
fprintf (stderr
, "In function %s:\n",
DECL_PRINT_NAME (current_function_decl
));
last_error_function
= current_function_decl
;
if (input_file_stack
&& input_file_stack
->next
!= 0
&& input_file_stack_tick
!= last_error_tick
)
fprintf (stderr
, "In file included");
for (p
= input_file_stack
->next
; p
; p
= p
->next
)
fprintf (stderr
, " from %s:%d", p
->name
, p
->line
);
last_error_tick
= input_file_stack_tick
;
/* Report an error at the current line number.
S and V are a string and an arg for `printf'. */
int v
; /* @@also used as pointer */
int v2
; /* @@also used as pointer */
error_with_file_and_line (input_filename
, lineno
, s
, v
, v2
);
/* Report an error at line LINE of file FILE.
S and V are a string and an arg for `printf'. */
error_with_file_and_line (file
, line
, s
, v
, v2
)
report_error_function (file
);
fprintf (stderr
, "%s:%d: ", file
, line
);
fprintf (stderr
, "%s: ", progname
);
fprintf (stderr
, s
, v
, v2
);
/* Report an error at the declaration DECL.
S and V are a string and an arg which uses %s to substitute the declaration name. */
error_with_decl (decl
, s
, v
)
report_error_function (DECL_SOURCE_FILE (decl
));
fprintf (stderr
, "%s:%d: ",
DECL_SOURCE_FILE (decl
), DECL_SOURCE_LINE (decl
));
if (DECL_PRINT_NAME (decl
))
fprintf (stderr
, s
, DECL_PRINT_NAME (decl
), v
);
else if (DECL_NAME (decl
))
fprintf (stderr
, s
, IDENTIFIER_POINTER (DECL_NAME (decl
)), v
);
fprintf (stderr
, s
, "((anonymous))", v
);
/* Report an error at argument #NUM.
S is a string that uses %s to substitute the error type.
E is the string for the error type. */
error_with_arg (s
, e
, num
)
static char argument
[] = "argument #%d: ";
w
= alloca (strlen (s
) + sizeof (argument
));
(void) strcat (strcpy (w
, argument
), s
);
/* Report an error at the line number of the insn INSN.
S and V are a string and an arg for `printf'.
This is used only when INSN is an `asm' with operands,
and each ASM_OPERANDS records its own source file and line. */
error_for_asm (insn
, s
, v
, v2
)
int v
; /* @@also used as pointer */
int v2
; /* @@also used as pointer */
rtx body
= PATTERN (insn
);
/* Find the (or one of the) ASM_OPERANDS in the insn. */
if (GET_CODE (body
) == SET
&& GET_CODE (SET_SRC (body
)) == ASM_OPERANDS
)
else if (GET_CODE (body
) == ASM_OPERANDS
)
else if (GET_CODE (body
) == PARALLEL
&& GET_CODE (XVECEXP (body
, 0, 0)) == SET
)
asmop
= SET_SRC (XVECEXP (body
, 0, 0));
else if (GET_CODE (body
) == PARALLEL
&& GET_CODE (XVECEXP (body
, 0, 0)) == ASM_OPERANDS
)
asmop
= XVECEXP (body
, 0, 0);
filename
= ASM_OPERANDS_SOURCE_FILE (asmop
);
line
= ASM_OPERANDS_SOURCE_LINE (asmop
);
error_with_file_and_line (filename
, line
, s
, v
, v2
);
/* Report a warning at line LINE.
S and V are a string and an arg for `printf'. */
warning_with_file_and_line (file
, line
, s
, v
, v2
)
if (count_error (1) == 0)
report_error_function (file
);
fprintf (stderr
, "%s:%d: ", file
, line
);
fprintf (stderr
, "%s: ", progname
);
fprintf (stderr
, "warning: ");
fprintf (stderr
, s
, v
, v2
);
/* Report a warning at the current line number.
S and V are a string and an arg for `printf'. */
int v
; /* @@also used as pointer */
warning_with_file_and_line (input_filename
, lineno
, s
, v
, v2
);
/* Report a warning at the declaration DECL.
S is string which uses %s to substitute the declaration name.
V is a second parameter that S can refer to. */
warning_with_decl (decl
, s
, v
)
if (count_error (1) == 0)
report_error_function (DECL_SOURCE_FILE (decl
));
fprintf (stderr
, "%s:%d: ",
DECL_SOURCE_FILE (decl
), DECL_SOURCE_LINE (decl
));
fprintf (stderr
, "warning: ");
if (DECL_PRINT_NAME (decl
))
fprintf (stderr
, s
, DECL_PRINT_NAME (decl
), v
);
else if (DECL_NAME (decl
))
fprintf (stderr
, s
, IDENTIFIER_POINTER (DECL_NAME (decl
)), v
);
fprintf (stderr
, s
, "((anonymous))", v
);
/* Report a warning at argument #NUM.
S is a string that uses %s to substitute the error type.
E is the string for the error type. */
warning_with_arg (s
, e
, num
)
static char argument
[] = "argument #%d: ";
w
= alloca (strlen (s
) + sizeof (argument
));
(void) strcat (strcpy (w
, argument
), s
);
/* Apologize for not implementing some feature.
S, V, and V2 are a string and args for `printf'. */
fprintf (stderr
, "%s:%d: ", input_filename
, lineno
);
fprintf (stderr
, "%s: ", progname
);
fprintf (stderr
, "sorry, not implemented: ");
fprintf (stderr
, s
, v
, v2
);
/* Apologize for not implementing some feature, then quit.
S, V, and V2 are a string and args for `printf'. */
fprintf (stderr
, "%s:%d: ", input_filename
, lineno
);
fprintf (stderr
, "c++: ");
fprintf (stderr
, "sorry, not implemented: ");
fprintf (stderr
, s
, v
, v2
);
/* More 'friendly' abort that prints the line and file.
config.h can #define abort fancy_abort if you like that sort of thing. */
fatal ("Internal gcc abort.");
/* When `malloc.c' is compiled with `rcheck' defined,
it calls this function to report clobberage. */
/* Same as `malloc' but report error if no memory available. */
register int value
= (int) malloc (size
);
fatal ("Virtual memory exhausted.");
/* Same as `realloc' but report error if no memory available. */
int result
= realloc (ptr
, size
);
fatal ("Virtual memory exhausted.");
/* Return the logarithm of X, base 2, considering X unsigned,
if X is a power of 2. Otherwise, returns -1. */
for (log
= 0; log
< HOST_BITS_PER_INT
; log
++)
/* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
for (log
= 0; log
< HOST_BITS_PER_INT
; log
++)
if ((x
& ((-1) << log
)) == 0)
return HOST_BITS_PER_INT
- 1;
/* Specify where to longjmp to when a floating arithmetic error happens.
If HANDLER is 0, it means don't handle the errors any more. */
set_float_handler (handler
)
float_handled
= (handler
!= 0);
bcopy (handler
, float_handler
, sizeof (float_handler
));
/* Signals actually come here. */
longjmp (float_handler
, 1);
/* Handler for SIGPIPE. */
fatal ("output pipe has been closed");
/* Compile an entire file of output from cpp, named NAME.
Write a file of assembly output and various debugging dumps. */
int dump_base_name_length
;
int name_specified
= name
!= 0;
dump_base_name
= name
? name
: "gccdump";
dump_base_name_length
= strlen (dump_base_name
);
if (name
== 0 || !strcmp (name
, "-"))
finput
= fopen (name
, "r");
/* Initialize data in various passes. */
/* If rtl dump desired, open the output file. */
register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
strcpy (dumpname
, dump_base_name
);
strcat (dumpname
, ".rtl");
rtl_dump_file
= fopen (dumpname
, "w");
pfatal_with_name (dumpname
);
/* If jump_opt dump desired, open the output file. */
register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
strcpy (dumpname
, dump_base_name
);
strcat (dumpname
, ".jump");
jump_opt_dump_file
= fopen (dumpname
, "w");
if (jump_opt_dump_file
== 0)
pfatal_with_name (dumpname
);
/* If cse dump desired, open the output file. */
register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
strcpy (dumpname
, dump_base_name
);
strcat (dumpname
, ".cse");
cse_dump_file
= fopen (dumpname
, "w");
pfatal_with_name (dumpname
);
/* If loop dump desired, open the output file. */
register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
strcpy (dumpname
, dump_base_name
);
strcat (dumpname
, ".loop");
loop_dump_file
= fopen (dumpname
, "w");
pfatal_with_name (dumpname
);
/* If flow dump desired, open the output file. */
register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
strcpy (dumpname
, dump_base_name
);
strcat (dumpname
, ".flow");
flow_dump_file
= fopen (dumpname
, "w");
pfatal_with_name (dumpname
);
/* If combine dump desired, open the output file. */
register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 10);
strcpy (dumpname
, dump_base_name
);
strcat (dumpname
, ".combine");
combine_dump_file
= fopen (dumpname
, "w");
if (combine_dump_file
== 0)
pfatal_with_name (dumpname
);
/* If local_reg dump desired, open the output file. */
register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
strcpy (dumpname
, dump_base_name
);
strcat (dumpname
, ".lreg");
local_reg_dump_file
= fopen (dumpname
, "w");
if (local_reg_dump_file
== 0)
pfatal_with_name (dumpname
);
/* If global_reg dump desired, open the output file. */
register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
strcpy (dumpname
, dump_base_name
);
strcat (dumpname
, ".greg");
global_reg_dump_file
= fopen (dumpname
, "w");
if (global_reg_dump_file
== 0)
pfatal_with_name (dumpname
);
/* If jump2_opt dump desired, open the output file. */
register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 7);
strcpy (dumpname
, dump_base_name
);
strcat (dumpname
, ".jump2");
jump2_opt_dump_file
= fopen (dumpname
, "w");
if (jump2_opt_dump_file
== 0)
pfatal_with_name (dumpname
);
/* If dbr_sched dump desired, open the output file. */
register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 7);
strcpy (dumpname
, dump_base_name
);
strcat (dumpname
, ".dbr");
dbr_sched_dump_file
= fopen (dumpname
, "w");
if (dbr_sched_dump_file
== 0)
pfatal_with_name (dumpname
);
/* Open assembler code output file. */
if (! name_specified
&& asm_file_name
== 0)
register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
int len
= strlen (dump_base_name
);
strcpy (dumpname
, dump_base_name
);
if (len
> 2 && ! strcmp (".c", dumpname
+ len
- 2))
else if (len
> 2 && ! strcmp (".i", dumpname
+ len
- 2))
else if (len
> 3 && ! strcmp (".co", dumpname
+ len
- 3))
asm_file_name
= (char *) malloc (strlen (dumpname
) + 1);
strcpy (asm_file_name
, dumpname
);
if (!strcmp (asm_file_name
, "-"))
asm_out_file
= fopen (asm_file_name
, "w");
pfatal_with_name (asm_file_name
);
/* the beginning of the file is a new line; check for # */
/* With luck, we discover the real source file's name from that
and put it in input_filename. */
ungetc (check_newline (), finput
);
/* If the input doesn't start with a #line, use the input name
as the official input file name. */
if (main_input_filename
== 0)
main_input_filename
= name
;
/* Put an entry on the input file stack for the main input file. */
= (struct file_stack
*) xmalloc (sizeof (struct file_stack
));
input_file_stack
->next
= 0;
input_file_stack
->name
= input_filename
;
ASM_FILE_START (asm_out_file
);
/* Output something to inform GDB that this compilation was by GCC. */
fprintf (asm_out_file
, "gcc_compiled.:\n");
ASM_IDENTIFY_GCC (asm_out_file
);
/* If GDB symbol table desired, open the GDB symbol output file. */
if (write_symbols
== GDB_DEBUG
)
register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
int len
= strlen (dump_base_name
);
strcpy (dumpname
, dump_base_name
);
if (len
> 2 && ! strcmp (".c", dumpname
+ len
- 2))
else if (len
> 2 && ! strcmp (".i", dumpname
+ len
- 2))
else if (len
> 3 && ! strcmp (".co", dumpname
+ len
- 3))
strcat (dumpname
, ".sym");
sym_file_name
= dumpname
;
symout_init (sym_file_name
, asm_out_file
, main_input_filename
);
/* If dbx symbol table desired, initialize writing it
and output the predefined types. */
#ifdef DBX_DEBUGGING_INFO
if (write_symbols
== DBX_DEBUG
)
dbxout_init (asm_out_file
, main_input_filename
);
#ifdef SDB_DEBUGGING_INFO
if (write_symbols
== SDB_DEBUG
)
sdbout_init (asm_out_file
, main_input_filename
);
/* Initialize yet another pass. */
init_final (main_input_filename
);
/* Call the parser, which parses the entire file
(calling rest_of_compilation for each function). */
/* Compilation is now finished except for writing
what's left of the symbol table output. */
parse_time
+= gettime () - start_time
;
parse_time
-= integration_time
;
parse_time
-= varconst_time
;
/* Really define vars that have had only a tentative definition.
Really output inline functions that must actually be callable
and have not been output so far. */
for (decl
= globals
; decl
; decl
= TREE_CHAIN (decl
))
if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
&& ! TREE_ASM_WRITTEN (decl
))
/* Don't write out static consts, unless we needed
to take their address for some reason. */
if (! TREE_READONLY (decl
)
|| TREE_ADDRESSABLE (decl
))
rest_of_decl_compilation (decl
, 0, 1, 1);
/* Otherwise maybe mention them just for the debugger. */
#ifdef DBX_DEBUGGING_INFO
else if (DECL_INITIAL (decl
) && write_symbols
== DBX_DEBUG
)
TIMEVAR (varconst_time
, dbxout_symbol (decl
, 0));
#ifdef SDB_DEBUGGING_INFO
else if (DECL_INITIAL (decl
) && write_symbols
== SDB_DEBUG
)
TIMEVAR (varconst_time
, sdbout_symbol (decl
, 0));
if (TREE_CODE (decl
) == FUNCTION_DECL
&& ! TREE_ASM_WRITTEN (decl
)
&& DECL_INITIAL (decl
) != 0
&& TREE_ADDRESSABLE (decl
)
&& ! TREE_EXTERNAL (decl
))
output_inline_function (decl
);
/* Warn about any function declared static but not defined. */
&& TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_INITIAL (decl
) == 0
warning_with_decl (decl
, "`%s' declared but never defined");
/* Warn about statics fns or vars defined but not used,
but not about inline functions
since unused inline statics is normal practice. */
&& (TREE_CODE (decl
) == FUNCTION_DECL
|| TREE_CODE (decl
) == VAR_DECL
)
&& ! TREE_EXTERNAL (decl
)
/* The TREE_USED bit for file-scope decls
is kept in the identifier, to handle multiple
external decls in different scopes. */
&& ! TREE_USED (DECL_NAME (decl
)))
warning_with_decl (decl
, "`%s' defined but not used");
#ifdef DBX_DEBUGGING_INFO
if (write_symbols
== DBX_DEBUG
)
dbxout_tags (gettags ());
dbxout_types (get_permanent_types ());
#ifdef SDB_DEBUGGING_INFO
if (write_symbols
== SDB_DEBUG
)
sdbout_tags (gettags ());
sdbout_types (get_permanent_types ());
if (write_symbols
== GDB_DEBUG
)
fstat (fileno (finput
), &statbuf
);
symout_types (get_permanent_types ());
symout_top_blocks (globals
, gettags ());
symout_finish (name
, statbuf
.st_ctime
);
/* Output some stuff at end of file if nec. */
end_final (main_input_filename
);
ASM_FILE_END (asm_out_file
);
/* Close the dump files. */
fclose (jump_opt_dump_file
);
dump_combine_total_stats (combine_dump_file
);
fclose (combine_dump_file
);
fclose (local_reg_dump_file
);
fclose (global_reg_dump_file
);
fclose (jump2_opt_dump_file
);
fclose (dbr_sched_dump_file
);
/* Close non-debugging input and output files. Take special care to note
whether fclose returns an error, since the pages might still be on the
buffer chain while the file is open. */
if (ferror (asm_out_file
) != 0 || fclose (asm_out_file
) != 0)
fatal_io_error (asm_file_name
);
print_time ("parse", parse_time
);
print_time ("integration", integration_time
);
print_time ("jump", jump_time
);
print_time ("cse", cse_time
);
print_time ("loop", loop_time
);
print_time ("flow", flow_time
);
print_time ("combine", combine_time
);
print_time ("local-alloc", local_alloc_time
);
print_time ("global-alloc", global_alloc_time
);
print_time ("dbranch", dbr_sched_time
);
print_time ("final", final_time
);
print_time ("varconst", varconst_time
);
print_time ("symout", symout_time
);
print_time ("dump", dump_time
);
/* This is called from finish_decl (within yyparse)
for each declaration of a function or variable.
This does nothing for automatic variables.
Otherwise, it sets up the RTL and outputs any assembler code
(label definition, storage allocation and initialization).
DECL is the declaration. If ASMSPEC is nonzero, it specifies
the assembler symbol name to be used. TOP_LEVEL is nonzero
if this declaration is not within a function. */
rest_of_decl_compilation (decl
, asmspec
, top_level
, at_end
)
/* Declarations of variables, and of functions defined elsewhere. */
if (TREE_STATIC (decl
) || TREE_EXTERNAL (decl
))
make_decl_rtl (decl
, asmspec
, top_level
);
when a tentative file-scope definition is seen.
But at end of compilation, do output code for them. */
if (! (! at_end
&& top_level
&& (DECL_INITIAL (decl
) == 0
|| DECL_INITIAL (decl
) == error_mark_node
)))
assemble_variable (decl
, top_level
, write_symbols
, at_end
);
else if (TREE_REGDECL (decl
) && asmspec
!= 0)
if (decode_reg_name (asmspec
) >= 0)
make_decl_rtl (decl
, asmspec
, top_level
);
error ("invalid register name `%s' for register variable", asmspec
);
#ifdef DBX_DEBUGGING_INFO
else if (write_symbols
== DBX_DEBUG
&& TREE_CODE (decl
) == TYPE_DECL
)
TIMEVAR (varconst_time
, dbxout_symbol (decl
, 0));
#ifdef SDB_DEBUGGING_INFO
else if (write_symbols
== SDB_DEBUG
&& top_level
&& TREE_CODE (decl
) == TYPE_DECL
)
TIMEVAR (varconst_time
, sdbout_symbol (decl
, 0));
if (write_symbols
== GDB_DEBUG
)
/* The initizations make types when they contain
string constants. The types are on the temporary
obstack, so output them now before they go away. */
symout_types (get_temporary_types ());
/* Clean out the temporary type list, since the types will go away. */
/* This is called from finish_function (within yyparse)
after each top-level definition is parsed.
It is supposed to compile that function or variable
and output the assembler code for it.
After we return, the tree storage is freed. */
rest_of_compilation (decl
)
int start_time
= gettime ();
/* If we are reconsidering an inline function
at the end of compilation, skip the stuff for making it inline. */
if (DECL_SAVED_INSNS (decl
) == 0)
/* If requested, consider whether to make this function inline. */
if (flag_inline_functions
|| TREE_INLINE (decl
))
TIMEVAR (integration_time
,
int specd
= TREE_INLINE (decl
);
char *lose
= function_cannot_inline_p (decl
);
warning_with_decl (decl
, lose
);
/* Dump the rtl code if we are dumping rtl. */
fprintf (rtl_dump_file
, "\n;; Function %s\n\n",
IDENTIFIER_POINTER (DECL_NAME (decl
)));
if (DECL_SAVED_INSNS (decl
))
fprintf (rtl_dump_file
, ";; (integrable)\n\n");
print_rtl (rtl_dump_file
, insns
);
/* If function is inline, and we don't yet know whether to
compile it by itself, defer decision till end of compilation.
finish_compilation will call rest_of_compilation again
for those functions that need to be output. */
if (((! TREE_PUBLIC (decl
) && ! TREE_ADDRESSABLE (decl
)
&& ! flag_keep_inline_functions
)
goto exit_rest_of_compilation
;
if (rtl_dump_and_exit
|| flag_syntax_only
)
goto exit_rest_of_compilation
;
TREE_ASM_WRITTEN (decl
) = 1;
/* Copy any shared structure that should not be shared. */
/* See if we have allocated stack slots that are not directly addressable.
If so, scan all the insns and create explicit address computation
for all references to such slots. */
/* fixup_stack_slots (); */
/* Do jump optimization the first time, if -opt.
Also do it if -W, but in that case it doesn't change the rtl code,
it only computes whether control can drop off the end of the function. */
if (optimize
|| extra_warnings
|| warn_return_type
/* If function is `volatile', we should warn if it tries to return. */
|| TREE_THIS_VOLATILE (decl
))
TIMEVAR (jump_time
, jump_optimize (insns
, 0, 0));
/* Dump rtl code after jump, if we are doing that. */
fprintf (jump_opt_dump_file
, "\n;; Function %s\n\n",
IDENTIFIER_POINTER (DECL_NAME (decl
)));
print_rtl (jump_opt_dump_file
, insns
);
fflush (jump_opt_dump_file
);
/* Perform common subexpression elimination.
Nonzero value from `cse_main' means that jumps were simplified
and some code may now be unreachable, so do
jump optimization again. */
TIMEVAR (cse_time
, reg_scan (insns
, max_reg_num (), 0));
TIMEVAR (cse_time
, tem
= cse_main (insns
, max_reg_num ()));
TIMEVAR (jump_time
, jump_optimize (insns
, 0, 0));
/* Dump rtl code after cse, if we are doing that. */
fprintf (cse_dump_file
, "\n;; Function %s\n\n",
IDENTIFIER_POINTER (DECL_NAME (decl
)));
print_rtl (cse_dump_file
, insns
);
fprintf (loop_dump_file
, "\n;; Function %s\n\n",
IDENTIFIER_POINTER (DECL_NAME (decl
)));
/* Move constant computations out of loops. */
reg_scan (insns
, max_reg_num (), 1);
loop_optimize (insns
, loop_dump
? loop_dump_file
: 0);
/* Dump rtl code after loop opt, if we are doing that. */
print_rtl (loop_dump_file
, insns
);
/* Now we choose between stupid (pcc-like) register allocation
(if we got the -noreg switch and not -opt)
and smart register allocation. */
if (optimize
) /* Stupid allocation probably won't work */
obey_regdecls
= 0; /* if optimizations being done. */
/* Print function header into flow dump now
because doing the flow analysis makes some of the dump. */
fprintf (flow_dump_file
, "\n;; Function %s\n\n",
IDENTIFIER_POINTER (DECL_NAME (decl
)));
regclass (insns
, max_reg_num ());
stupid_life_analysis (insns
, max_reg_num (),
/* Do control and data flow analysis,
and write some of the results to dump file. */
TIMEVAR (flow_time
, flow_analysis (insns
, max_reg_num (),
uninitialized_vars_warning (DECL_INITIAL (decl
));
/* Dump rtl after flow analysis. */
print_rtl (flow_dump_file
, insns
);
/* If -opt, try combining insns through substitution. */
TIMEVAR (combine_time
, combine_instructions (insns
, max_reg_num ()));
/* Dump rtl code after insn combination. */
fprintf (combine_dump_file
, "\n;; Function %s\n\n",
IDENTIFIER_POINTER (DECL_NAME (decl
)));
dump_combine_stats (combine_dump_file
);
print_rtl (combine_dump_file
, insns
);
fflush (combine_dump_file
);
/* Unless we did stupid register allocation,
allocate pseudo-regs that are used only within 1 basic block. */
TIMEVAR (local_alloc_time
,
regclass (insns
, max_reg_num ());
/* Dump rtl code after allocating regs within basic blocks. */
fprintf (local_reg_dump_file
, "\n;; Function %s\n\n",
IDENTIFIER_POINTER (DECL_NAME (decl
)));
dump_flow_info (local_reg_dump_file
);
dump_local_alloc (local_reg_dump_file
);
print_rtl (local_reg_dump_file
, insns
);
fflush (local_reg_dump_file
);
fprintf (global_reg_dump_file
, "\n;; Function %s\n\n",
IDENTIFIER_POINTER (DECL_NAME (decl
))));
/* Unless we did stupid register allocation,
allocate remaining pseudo-regs, then do the reload pass
fixing up any insns that are invalid. */
TIMEVAR (global_alloc_time
,
global_alloc (global_reg_dump
? global_reg_dump_file
: 0);
global_reg_dump
? global_reg_dump_file
: 0);
dump_global_regs (global_reg_dump_file
);
print_rtl (global_reg_dump_file
, insns
);
fflush (global_reg_dump_file
);
rtx_equal_function_value_matters
= 1;
/* One more attempt to remove jumps to .+1
left by dead-store-elimination.
Also do cross-jumping this time
and delete no-op move insns. */
TIMEVAR (jump_time
, jump_optimize (insns
, 1, 1));
/* Dump rtl code after jump, if we are doing that. */
fprintf (jump2_opt_dump_file
, "\n;; Function %s\n\n",
IDENTIFIER_POINTER (DECL_NAME (decl
)));
print_rtl (jump2_opt_dump_file
, insns
);
fflush (jump2_opt_dump_file
);
/* If a scheduling pass for delayed branches is to be done,
call the scheduling code. */
#ifdef HAVE_DELAYED_BRANCH
if (optimize
&& flag_delayed_branch
)
TIMEVAR (dbr_sched_time
, dbr_schedule (insns
, dbr_sched_dump_file
));
fprintf (dbr_sched_dump_file
, "\n;; Function %s\n\n",
IDENTIFIER_POINTER (DECL_NAME (decl
)));
print_rtl (dbr_sched_dump_file
, insns
);
fflush (dbr_sched_dump_file
);
/* Now turn the rtl into assembler code. */
assemble_function (decl
);
final_start_function (insns
, asm_out_file
,
write_symbols
, optimize
);
final (insns
, asm_out_file
,
write_symbols
, optimize
, 0);
final_end_function (insns
, asm_out_file
,
write_symbols
, optimize
);
/* Write GDB symbols if requested */
if (write_symbols
== GDB_DEBUG
)
symout_types (get_permanent_types ());
symout_types (get_temporary_types ());
DECL_BLOCK_SYMTAB_ADDRESS (decl
)
= symout_function (DECL_INITIAL (decl
),
DECL_ARGUMENTS (decl
), 0);
/* Write DBX symbols if requested */
#ifdef DBX_DEBUGGING_INFO
if (write_symbols
== DBX_DEBUG
)
TIMEVAR (symout_time
, dbxout_function (decl
));
exit_rest_of_compilation
:
rtx_equal_function_value_matters
= 0;
/* Clear out the real_constant_chain before some of the rtx's
it runs through become garbage. */
clear_const_double_mem ();
/* The parsing time is all the time spent in yyparse
*except* what is spent in this function. */
parse_time
-= gettime () - start_time
;
/* Entry point of cc1. Decode command args, then call compile_file.
Exit code is 35 if can't open files, 34 if fatal error,
33 if had nonfatal errors, else success. */
/* save in case md file wants to emit args as a comment. */
p
= argv
[0] + strlen (argv
[0]);
while (p
!= argv
[0] && p
[-1] != '/') --p
;
/* Get rid of any avoidable limit on stack size. */
/* Set the stack limit huge so that alloca does not fail. */
getrlimit (RLIMIT_STACK
, &rlim
);
rlim
.rlim_cur
= rlim
.rlim_max
;
setrlimit (RLIMIT_STACK
, &rlim
);
#endif /* RLIMIT_STACK */
signal (SIGFPE
, float_signal
);
signal (SIGPIPE
, pipe_closed
);
/* Initialize whether `char' is signed. */
flag_signed_char
= DEFAULT_SIGNED_CHAR
;
#ifdef DEFAULT_SHORT_ENUMS
/* Initialize how much space enums occupy, by default. */
flag_short_enums
= DEFAULT_SHORT_ENUMS
;
/* This is zeroed by -O. */
/* Initialize register usage now so switches may override. */
for (i
= 1; i
< argc
; i
++)
if (argv
[i
][0] == '-' && argv
[i
][1] != 0)
register char *str
= argv
[i
] + 1;
set_target_switch (&str
[1]);
else if (!strcmp (str
, "dumpbase"))
dump_base_name
= argv
[++i
];
register char *p
= &str
[1];
register char *p
= &str
[1];
/* Some kind of -f option.
P's value is the option sans `-f'.
Search for it in the table of options. */
!found
&& j
< sizeof (f_options
) / sizeof (f_options
[0]);
if (!strcmp (p
, f_options
[j
].string
))
*f_options
[j
].variable
= f_options
[j
].on_value
;
/* A goto here would be cleaner,
but breaks the vax pcc. */
if (p
[0] == 'n' && p
[1] == 'o' && p
[2] == '-'
&& ! strcmp (p
+3, f_options
[j
].string
))
*f_options
[j
].variable
= ! f_options
[j
].on_value
;
else if (!strncmp (p
, "fixed-", 6))
fix_register (&p
[6], 1, 1);
else if (!strncmp (p
, "call-used-", 10))
fix_register (&p
[10], 0, 1);
else if (!strncmp (p
, "call-saved-", 11))
fix_register (&p
[11], 0, 0);
else if (! lang_decode_option (argv
[i
]))
error ("Invalid option `%s'", argv
[i
]);
else if (!strcmp (str
, "noreg"))
else if (!strcmp (str
, "opt"))
optimize
= 1, obey_regdecls
= 0;
else if (!strcmp (str
, "O"))
optimize
= 1, obey_regdecls
= 0;
else if (!strcmp (str
, "pedantic"))
else if (lang_decode_option (argv
[i
]))
else if (!strcmp (str
, "quiet"))
else if (!strcmp (str
, "version"))
extern char *version_string
, *language_string
;
fprintf (stderr
, "%s version %s", language_string
, version_string
);
#define __VERSION__ "[unknown]"
fprintf (stderr
, " compiled by GNU C version %s.\n", __VERSION__
);
fprintf (stderr
, " compiled by CC.\n");
print_target_switch_defaults ();
else if (!strcmp (str
, "w"))
else if (!strcmp (str
, "W"))
else if (!strcmp (str
, "Wunused"))
else if (!strcmp (str
, "Wshadow"))
else if (!strcmp (str
, "Wswitch"))
else if (!strncmp (str
, "Wid-clash-", 10))
if (*endp
>= '0' && *endp
<= '9')
error ("Invalid option `%s'", argv
[i
]);
id_clash_len
= atoi (str
+ 10);
else if (!strcmp (str
, "p"))
else if (!strcmp (str
, "a"))
#if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
warning ("`-a' option (basic block profile) not supported");
else if (!strcmp (str
, "gg"))
write_symbols
= GDB_DEBUG
;
#ifdef DBX_DEBUGGING_INFO
else if (!strcmp (str
, "g0"))
write_symbols
= DBX_DEBUG
;
else if (!strcmp (str
, "G0"))
write_symbols
= DBX_DEBUG
;
else if (!strcmp (str
, "g"))
write_symbols
= DBX_DEBUG
;
use_gdb_dbx_extensions
= 1;
else if (!strcmp (str
, "G"))
write_symbols
= DBX_DEBUG
;
use_gdb_dbx_extensions
= 1;
#ifdef SDB_DEBUGGING_INFO
else if (!strcmp (str
, "g"))
write_symbols
= SDB_DEBUG
;
else if (!strcmp (str
, "G"))
write_symbols
= SDB_DEBUG
;
else if (!strcmp (str
, "g0"))
write_symbols
= SDB_DEBUG
;
else if (!strcmp (str
, "G0"))
write_symbols
= SDB_DEBUG
;
else if (!strcmp (str
, "symout"))
if (write_symbols
== NO_DEBUG
)
write_symbols
= GDB_DEBUG
;
sym_file_name
= argv
[++i
];
else if (!strcmp (str
, "o"))
asm_file_name
= argv
[++i
];
error ("Invalid option `%s'", argv
[i
]);
/* Some machines may reject certain combinations of options. */
/* Now that register usage is specified, convert it to HARD_REG_SETs. */
char *lim
= (char *) sbrk (0);
fprintf (stderr
, "Data size %d.\n",
(int) lim
- (int) &environ
);
exit (SUCCESS_EXIT_CODE
);
/* Decode -m switches. */
/* Here is a table, controlled by the tm-...h file, listing each -m switch
and which bits in `target_switches' it should set or clear.
If VALUE is positive, it is bits to set.
If VALUE is negative, -VALUE is bits to clear.
(The sign bit is not used so there is no confusion.) */
struct {char *name
; int value
;} target_switches
[]
/* Decode the switch -mNAME. */
for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
if (!strcmp (target_switches
[j
].name
, name
))
if (target_switches
[j
].value
< 0)
target_flags
&= ~-target_switches
[j
].value
;
target_flags
|= target_switches
[j
].value
;
error ("Invalid option `%s'", name
);
/* Print default target switches for -version. */
print_target_switch_defaults ()
register int mask
= TARGET_DEFAULT
;
fprintf (stderr
, "default target switches:");
for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
if (target_switches
[j
].name
[0] != '\0'
&& target_switches
[j
].value
> 0
&& (target_switches
[j
].value
& mask
) == target_switches
[j
].value
)
fprintf (stderr
, " -m%s", target_switches
[j
].name
);