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- /* 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)
- 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- /* This is the top level of cc1/c++.
- 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. */
-
- #include "config.h"
- #include <stdio.h>
- #include <signal.h>
- #include <setjmp.h>
-
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <sys/file.h>
-
- #ifdef NO_UNISTD_H
- #define SEEK_SET L_SET
- #define SEEK_CUR L_INCR
- #define SEEK_END L_XTND
- #else
- #include <unistd.h>
- #endif
-
- #ifdef USG
- #include <sys/fcntl.h>
- #undef FLOAT
- #include <sys/param.h>
- /* This is for hpux. It is a real screw. They should change hpux. */
- #undef FLOAT
- #include <sys/times.h>
- #include <time.h> /* Correct for hpux at least. Is it good on other USG? */
- #undef FFS /* Some systems define this in param.h. */
- #else
- #ifndef VMS
- #include <sys/time.h>
- #include <sys/resource.h>
- #endif
- #endif
-
- #include "input.h"
- #include "tree.h"
- #include "c-tree.h"
- #include "rtl.h"
- #include "flags.h"
-
- #ifndef _bufsiz
- #define _bufsiz(p) ((p)->_bufsiz)
- #endif
-
- /* Change by Bryan Boreham, Kewill, Sun Jul 23 14:41:26 1989.
- Added some stuff for unexec-ing a part-done compilation. */
-
- int been_here_before = 0; /* Is this an unexec'd program? */
- int just_done_unexec = 0; /* Is this the process that *was* unexec'd? */
- char *dump_source_name; /* Keep argv[0] for dumping. */
-
- /* @@ Should there be a filename length limit? */
- char previous_asm_file_name[128]; /* asm_file_name from the first run. */
-
- extern int yydebug;
-
- extern FILE *finput;
-
- extern int reload_completed;
- extern int rtx_equal_function_value_matters;
-
- extern void init_lex ();
- extern void init_decl_processing ();
- extern void init_tree ();
- extern void init_rtl ();
- extern void init_optabs ();
- extern void init_stmt ();
- extern void init_reg_sets ();
- extern void dump_flow_info ();
- extern void dump_local_alloc ();
-
- void rest_of_decl_compilation ();
- void error ();
- void error_with_file_and_line ();
- void fancy_abort ();
- void set_target_switch ();
- void print_target_switch_defaults ();
- static char *decl_name ();
-
- /* 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. */
-
- int target_flags;
-
- /* Name of current original source file (what was input to cpp).
- This comes from each #-command in the actual input. */
-
- char *input_filename;
-
- /* 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. */
-
- int lineno;
-
- /* 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. */
-
- char *dump_base_name;
-
- /* Flags saying which kinds of debugging dump have been requested. */
-
- int rtl_dump = 0;
- int rtl_dump_and_exit = 0;
- int jump_opt_dump = 0;
- int cse_dump = 0;
- int loop_dump = 0;
- int flow_dump = 0;
- int combine_dump = 0;
- int local_reg_dump = 0;
- int global_reg_dump = 0;
- int jump2_opt_dump = 0;
- int dbr_sched_dump = 0;
-
- /* 1 => write gdb debugging output (using symout.c). -g0
- 2 => write dbx debugging output (using dbxout.c). -G0 */
-
- 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. */
-
- int optimize = 0;
-
- /* Nonzero means `char' should be signed. */
-
- int flag_signed_char;
-
- /* Nonzero means give an enum type only as many bytes as it needs. */
-
- int flag_short_enums;
-
- /* 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;
- #else
- int flag_caller_saves = 0;
- #endif
-
- /* 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. */
-
- int flag_force_mem = 0;
-
- /* Nonzero for -fforce-addr: load memory address into a register before
- reference to memory. This makes better cse but slower compilation. */
-
- int flag_force_addr = 0;
-
- /* Nonzero for -fdefer-pop: don't pop args after each function call;
- instead save them up to pop many calls' args with one insns. */
-
- int flag_defer_pop = 1;
-
- /* 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 for -fcse-follow-jumps:
- have cse follow jumps to do a more extensive job. */
-
- int flag_cse_follow_jumps;
-
- /* 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. */
-
- int flag_volatile;
-
- /* Nonzero means just do syntax checking; don't output anything. */
-
- int flag_syntax_only = 0;
-
- /* Nonzero means do stupid register allocation.
- Currently, this is 1 if `optimize' is 0. */
-
- int obey_regdecls = 0;
-
- /* Don't print functions as they are compiled and don't print
- times taken by the various passes. -quiet. */
-
- int quiet_flag = 0;
-
- /* Don't print warning messages. -w. */
-
- int inhibit_warnings = 0;
-
- /* Do print extra warnings (such as for uninitialized variables). -W. */
-
- int extra_warnings = 0;
-
- /* Nonzero to warn about unused local variables. */
-
- int warn_unused;
-
- /* Nonzero means warn about all declarations which shadow others. */
-
- int warn_shadow;
-
- /* Warn if a switch on an enum fails to have a case for every enum value. */
-
- int warn_switch;
-
- /* Warn if a type conversion is done that might have confusing results. */
-
- int warn_conversion;
-
- /* Nonzero means warn about any identifiers that match in the first N
- characters. The value N is in `id_clash_len'. */
-
- int warn_id_clash;
- int id_clash_len;
-
- /* Number of error messages and warning messages so far. */
-
- int errorcount = 0;
- int warningcount = 0;
- int sorrycount = 0;
-
- /* Pointer to function to compute the name to use to print a declaration. */
-
- char *(*decl_printable_name) ();
-
- /* Pointer to function to compute rtl for a language-specific tree code. */
-
- struct rtx_def *(*lang_expand_expr) ();
-
- /* Name of program invoked, sans directories. */
-
- char *progname;
-
- /* Nonzero if generating code to do profiling. */
-
- int profile_flag = 0;
-
- /* Nonzero if generating code to do profiling on a line-by-line basis. */
-
- int profile_block_flag;
-
- /* Nonzero for -pedantic switch: warn about anything
- that standard spec forbids. */
-
- int pedantic = 0;
-
- /* 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
- purposes. */
-
- int flag_keep_inline_functions;
-
- /* Nonzero means make the text shared if supported. */
-
- int flag_shared_data;
-
- /* Nonzero means schedule into delayed branch slots if supported. */
-
- int flag_delayed_branch;
-
- /* Copy of arguments to main. */
- int save_argc;
- char **save_argv;
-
- /* Nonzero means schedule instructions within basic blocks. */
-
- int flag_schedule_insns = 0;
-
- /* Name for output file of assembly code, specified with -o. */
-
- char *asm_file_name;
-
- #if 0
- /* Name for output file of GDB symbol segment, specified with -symout. */
-
- char *sym_file_name;
- #endif /* 0 */
-
- /* 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.) */
-
- static 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},
- {"cse-follow-jumps", &flag_cse_follow_jumps, 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},
- {"schedule-insns", &flag_schedule_insns, 1}
- };
-
- /* Output files for assembler code (real compiler output)
- and debugging dumps. */
-
- FILE *asm_out_file;
- FILE *rtl_dump_file;
- FILE *jump_opt_dump_file;
- FILE *cse_dump_file;
- FILE *loop_dump_file;
- FILE *flow_dump_file;
- FILE *combine_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. */
-
- int parse_time;
- int varconst_time;
- int integration_time;
- int jump_time;
- int cse_time;
- int loop_time;
- int flow_time;
- int combine_time;
- int local_alloc_time;
- int global_alloc_time;
- int dbr_sched_time;
- int shorten_branch_time;
- int final_time;
- int symout_time;
- int dump_time;
-
- /* Return time used so far, in microseconds. */
-
- int
- gettime ()
- {
- #ifdef USG
- struct tms tms;
- #else
- #ifndef VMS
- struct rusage rusage;
- #else /* VMS */
- struct
- {
- int proc_user_time;
- int proc_system_time;
- int child_user_time;
- int child_system_time;
- } vms_times;
- #endif
- #endif
-
- if (quiet_flag)
- return 0;
-
- #ifdef USG
- times (&tms);
- return (tms.tms_utime + tms.tms_stime) * (1000000 / HZ);
- #else
- #ifndef VMS
- getrusage (0, &rusage);
- return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
- + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
- #else /* VMS */
- times (&vms_times);
- return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
- #endif
- #endif
- }
-
- #define TIMEVAR(VAR, BODY) \
- do { int otime = gettime (); BODY; VAR += gettime () - otime; } while (0)
-
- void
- print_time (str, total)
- char *str;
- int total;
- {
- fprintf (stderr,
- "time in %s: %d.%06d\n",
- str, total / 1000000, total % 1000000);
- }
-
- /* Count an error or warning. Return 1 if the message should be printed. */
-
- int
- count_error (warningp)
- int warningp;
- {
- if (warningp && inhibit_warnings)
- return 0;
-
- if (warningp)
- warningcount++;
- else
- errorcount++;
-
- return 1;
- }
-
- /* Print a fatal error message. NAME is the text.
- Also include a system error message based on `errno'. */
-
- void
- pfatal_with_name (name)
- char *name;
- {
- fprintf (stderr, "%s: ", progname);
- perror (name);
- exit (35);
- }
-
- void
- fatal_io_error (name)
- char *name;
- {
- fprintf (stderr, "%s: %s: I/O error\n", progname, name);
- exit (35);
- }
-
- void
- fatal (s, v)
- char *s;
- int v;
- {
- error (s, v);
- exit (34);
- }
-
- /* 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(). */
-
- void
- fatal_insn_not_found (insn)
- rtx insn;
- {
- error ("The following insn was not recognizable:", 0);
- debug_rtx (insn);
- abort ();
- }
-
- /* This is the default decl_printable_name function. */
-
- static char *
- decl_name (decl)
- tree decl;
- {
- return IDENTIFIER_POINTER (DECL_NAME (decl));
- }
-
- 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. */
-
- void
- announce_function (decl)
- tree decl;
- {
- if (! quiet_flag)
- {
- if (rtl_dump_and_exit)
- fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
- else
- fprintf (stderr, " %s", (*decl_printable_name) (decl));
- fflush (stderr);
- need_error_newline = 1;
- 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. */
-
- void
- report_error_function (file)
- char *file;
- {
- struct file_stack *p;
-
- if (need_error_newline)
- {
- fprintf (stderr, "\n");
- need_error_newline = 0;
- }
-
- if (last_error_function != current_function_decl)
- {
- if (file)
- 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_printable_name) (current_function_decl));
- else
- fprintf (stderr, "In function %s:\n",
- (*decl_printable_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);
- if (p->next)
- fprintf (stderr, ",");
- }
- fprintf (stderr, ":\n");
- 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'. */
-
- void
- error (s, v, v2)
- char *s;
- 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'. */
-
- void
- error_with_file_and_line (file, line, s, v, v2)
- char *file;
- int line;
- char *s;
- int v;
- int v2;
- {
- count_error (0);
-
- report_error_function (file);
-
- if (file)
- fprintf (stderr, "%s:%d: ", file, line);
- else
- fprintf (stderr, "%s: ", progname);
- fprintf (stderr, s, v, v2);
- fprintf (stderr, "\n");
- }
-
- /* Report an error at the declaration DECL.
- S and V are a string and an arg which uses %s to substitute the declaration name. */
-
- void
- error_with_decl (decl, s, v)
- tree decl;
- char *s;
- int v;
- {
- count_error (0);
-
- report_error_function (DECL_SOURCE_FILE (decl));
-
- if (TREE_CODE (decl) == PARM_DECL)
- fprintf (stderr, "%s:%d: ",
- DECL_SOURCE_FILE (DECL_CONTEXT (decl)),
- DECL_SOURCE_LINE (DECL_CONTEXT (decl)));
- else
- fprintf (stderr, "%s:%d: ",
- DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
-
- if (DECL_NAME (decl))
- fprintf (stderr, s, (*decl_printable_name) (decl), v);
- else
- fprintf (stderr, s, "((anonymous))", v);
- fprintf (stderr, "\n");
- }
-
- /* 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. */
-
- void
- error_for_asm (insn, s, v, v2)
- rtx insn;
- char *s;
- int v; /* @@also used as pointer */
- int v2; /* @@also used as pointer */
- {
- char *filename;
- int line;
- rtx body = PATTERN (insn);
- rtx asmop;
-
- /* Find the (or one of the) ASM_OPERANDS in the insn. */
- if (GET_CODE (body) == SET && GET_CODE (SET_SRC (body)) == ASM_OPERANDS)
- asmop = SET_SRC (body);
- else if (GET_CODE (body) == ASM_OPERANDS)
- asmop = body;
- 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'. */
-
- void
- warning_with_file_and_line (file, line, s, v, v2)
- char *file;
- int line;
- char *s;
- int v;
- int v2;
- {
- if (count_error (1) == 0)
- return;
-
- report_error_function (file);
-
- if (file)
- fprintf (stderr, "%s:%d: ", file, line);
- else
- fprintf (stderr, "%s: ", progname);
-
- fprintf (stderr, "warning: ");
- fprintf (stderr, s, v, v2);
- fprintf (stderr, "\n");
- }
-
- /* Report a warning at the current line number.
- S and V are a string and an arg for `printf'. */
-
- void
- warning (s, v, v2)
- char *s;
- int v; /* @@also used as pointer */
- int v2;
- {
- 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. */
-
- void
- warning_with_decl (decl, s, v)
- tree decl;
- char *s;
- int v;
- {
- if (count_error (1) == 0)
- return;
-
- report_error_function (DECL_SOURCE_FILE (decl));
-
- if (TREE_CODE (decl) == PARM_DECL)
- fprintf (stderr, "%s:%d: ",
- DECL_SOURCE_FILE (DECL_CONTEXT (decl)),
- DECL_SOURCE_LINE (DECL_CONTEXT (decl)));
- else
- fprintf (stderr, "%s:%d: ",
- DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
-
- fprintf (stderr, "warning: ");
- if (DECL_NAME (decl))
- fprintf (stderr, s, (*decl_printable_name) (decl), v);
- else
- fprintf (stderr, s, "((anonymous))", v);
- fprintf (stderr, "\n");
- }
-
- /* Apologize for not implementing some feature.
- S, V, and V2 are a string and args for `printf'. */
-
- void
- sorry (s, v, v2)
- char *s;
- int v, v2;
- {
- sorrycount++;
- if (input_filename)
- fprintf (stderr, "%s:%d: ", input_filename, lineno);
- else
- fprintf (stderr, "%s: ", progname);
-
- fprintf (stderr, "sorry, not implemented: ");
- fprintf (stderr, s, v, v2);
- fprintf (stderr, "\n");
- }
-
- /* Apologize for not implementing some feature, then quit.
- S, V, and V2 are a string and args for `printf'. */
-
- void
- really_sorry (s, v, v2)
- char *s;
- int v, v2;
- {
- if (input_filename)
- fprintf (stderr, "%s:%d: ", input_filename, lineno);
- else
- fprintf (stderr, "c++: ");
-
- fprintf (stderr, "sorry, not implemented: ");
- fprintf (stderr, s, v, v2);
- fatal (" (fatal)\n");
- }
-
- /* More 'friendly' abort that prints the line and file.
- config.h can #define abort fancy_abort if you like that sort of thing. */
-
- void
- fancy_abort ()
- {
- fatal ("Internal gcc abort.");
- }
-
- /* When `malloc.c' is compiled with `rcheck' defined,
- it calls this function to report clobberage. */
-
- void
- botch (s)
- {
- abort ();
- }
-
- /* Same as `malloc' but report error if no memory available. */
-
- int
- xmalloc (size)
- unsigned size;
- {
- register int value = (int) malloc (size);
- if (value == 0)
- fatal ("Virtual memory exhausted.");
- return value;
- }
-
- /* Same as `realloc' but report error if no memory available. */
-
- int
- xrealloc (ptr, size)
- char *ptr;
- int size;
- {
- int result = realloc (ptr, size);
- if (!result)
- fatal ("Virtual memory exhausted.");
- return result;
- }
-
- /* Return the logarithm of X, base 2, considering X unsigned,
- if X is a power of 2. Otherwise, returns -1. */
-
- int
- exact_log2 (x)
- register unsigned int x;
- {
- register int log = 0;
- /* Test for 0 or a power of 2. */
- if (x == 0 || x != (x & -x))
- return -1;
- while ((x >>= 1) != 0)
- log++;
- return log;
- }
-
- /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
- If X is 0, return -1. */
-
- int
- floor_log2 (x)
- register unsigned int x;
- {
- register int log = -1;
- while (x != 0)
- log++,
- x >>= 1;
- return log;
- }
-
- int float_handled;
- jmp_buf float_handler;
- jmp_buf toplevel;
-
- /* Specify where to longjmp to when a floating arithmetic error happens.
- If HANDLER is 0, it means don't handle the errors any more. */
-
- void
- set_float_handler (handler)
- jmp_buf handler;
- {
- float_handled = (handler != 0);
- if (handler)
- bcopy (handler, float_handler, sizeof (float_handler));
- }
-
- /* Signals actually come here. */
-
- static void
- float_signal ()
- {
- if (float_handled == 0)
- abort ();
- float_handled = 0;
- longjmp (float_handler, 1);
- }
-
- /* Handler for SIGPIPE. */
-
- static void
- pipe_closed ()
- {
- 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. */
-
- static void
- compile_file (name)
- char *name;
- {
- tree globals;
- int start_time;
- int dump_base_name_length;
-
- int name_specified = name != 0;
-
- if (dump_base_name == 0 || been_here_before)
- dump_base_name = name ? name : "gccdump";
- dump_base_name_length = strlen (dump_base_name);
-
- parse_time = 0;
- varconst_time = 0;
- integration_time = 0;
- jump_time = 0;
- cse_time = 0;
- loop_time = 0;
- flow_time = 0;
- combine_time = 0;
- local_alloc_time = 0;
- global_alloc_time = 0;
- dbr_sched_time = 0;
- shorten_branch_time = 0;
- final_time = 0;
- symout_time = 0;
- dump_time = 0;
-
- /* Open input file. */
-
- if (name == 0 || !strcmp (name, "-"))
- {
- finput = stdin;
- name = "stdin";
- }
- else
- finput = fopen (name, "r");
- if (finput == 0)
- pfatal_with_name (name);
-
- /* Initialize data in various passes,
- checking if this is an unexec'd program - bryan@kewill.uucp. */
-
- if (!been_here_before)
- {
- init_tree ();
- init_lex ();
- init_rtl ();
- init_emit_once ();
- init_decl_processing ();
- init_optabs ();
- init_stmt ();
- }
- else
- {
- extern void reinit_lex_for_unexec ();
- reinit_lex_for_unexec ();
- reinit_search_statistics ();
- main_input_filename = 0;
- }
-
- /* If rtl dump desired, open the output file. */
- if (rtl_dump)
- {
- register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
- strcpy (dumpname, dump_base_name);
- strcat (dumpname, ".rtl");
- rtl_dump_file = fopen (dumpname, "w");
- if (rtl_dump_file == 0)
- pfatal_with_name (dumpname);
- }
-
- /* If jump_opt dump desired, open the output file. */
- if (jump_opt_dump)
- {
- 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. */
- if (cse_dump)
- {
- register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
- strcpy (dumpname, dump_base_name);
- strcat (dumpname, ".cse");
- cse_dump_file = fopen (dumpname, "w");
- if (cse_dump_file == 0)
- pfatal_with_name (dumpname);
- }
-
- /* If loop dump desired, open the output file. */
- if (loop_dump)
- {
- register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
- strcpy (dumpname, dump_base_name);
- strcat (dumpname, ".loop");
- loop_dump_file = fopen (dumpname, "w");
- if (loop_dump_file == 0)
- pfatal_with_name (dumpname);
- }
-
- /* If flow dump desired, open the output file. */
- if (flow_dump)
- {
- register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
- strcpy (dumpname, dump_base_name);
- strcat (dumpname, ".flow");
- flow_dump_file = fopen (dumpname, "w");
- if (flow_dump_file == 0)
- pfatal_with_name (dumpname);
- }
-
- /* If combine dump desired, open the output file. */
- if (combine_dump)
- {
- 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. */
- if (local_reg_dump)
- {
- 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. */
- if (global_reg_dump)
- {
- 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. */
- if (jump2_opt_dump)
- {
- 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. */
- if (dbr_sched_dump)
- {
- 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)
- asm_out_file = stdout;
- else
- {
- 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))
- dumpname[len - 2] = 0;
- else if (len > 2 && ! strcmp (".i", dumpname + len - 2))
- dumpname[len - 2] = 0;
- else if (len > 3 && ! strcmp (".co", dumpname + len - 3))
- dumpname[len - 3] = 0;
- strcat (dumpname, ".s");
- if (asm_file_name == 0)
- {
- asm_file_name = (char *) malloc (strlen (dumpname) + 1);
- strcpy (asm_file_name, dumpname);
- }
- if (!strcmp (asm_file_name, "-"))
- asm_out_file = stdout;
- else
- asm_out_file = fopen (asm_file_name, "w");
- if (asm_out_file == 0)
- pfatal_with_name (asm_file_name);
- }
-
- input_filename = 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. */
- input_file_stack
- = (struct file_stack *) xmalloc (sizeof (struct file_stack));
- input_file_stack->next = 0;
- input_file_stack->name = input_filename;
-
- if (!been_here_before)
- {
- ASM_FILE_START (asm_out_file);
-
- /* Output something to inform GDB that this compilation was by GCC. */
- #ifndef ASM_IDENTIFY_GCC
- fprintf (asm_out_file, "gcc_compiled.:\n");
- #else
- ASM_IDENTIFY_GCC (asm_out_file);
- #endif
-
- }
- else
- {
- /* Copy what we output during the first run into this asm file. */
- FILE *prev_file;
- int c;
- prev_file = fopen (previous_asm_file_name, "r");
- if (prev_file == 0)
- pfatal_with_name (previous_asm_file_name);
- #ifndef VMS
- if (_bufsiz(asm_out_file) != _bufsiz(prev_file))
- #endif
- {
- while ((c = getc (prev_file)) != EOF)
- putc (c, asm_out_file);
- }
- #ifndef VMS
- else
- {
- /* Copy quickly. */
- int dummy, size;
-
- fwrite (&dummy, 1, 1, asm_out_file);
- asm_out_file->_ptr = asm_out_file->_base;
- asm_out_file->_cnt = _bufsiz(asm_out_file);
- do
- {
- size = fread (asm_out_file->_base, 1, _bufsiz(asm_out_file), prev_file);
- asm_out_file->_ptr += size;
- asm_out_file->_cnt -= size;
- fflush (asm_out_file);
- }
- while (size == _bufsiz(asm_out_file));
- }
- #endif
- fclose (prev_file);
- }
-
- #ifdef 0 /* This mode is discontinued. */
- /* 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))
- dumpname[len - 2] = 0;
- else if (len > 2 && ! strcmp (".i", dumpname + len - 2))
- dumpname[len - 2] = 0;
- else if (len > 3 && ! strcmp (".co", dumpname + len - 3))
- dumpname[len - 3] = 0;
- strcat (dumpname, ".sym");
- if (sym_file_name == 0)
- sym_file_name = dumpname;
- symout_init (sym_file_name, asm_out_file, main_input_filename);
- }
- #endif /* 0 */
-
- /* If dbx symbol table desired, initialize writing it
- and output the predefined types. */
- #ifdef DBX_DEBUGGING_INFO
- if (write_symbols == DBX_DEBUG)
- {
- if (!been_here_before)
- dbxout_init (asm_out_file, main_input_filename);
- else
- {
- extern void re_init_dbxout_for_unexec ();
- re_init_dbxout_for_unexec (asm_out_file, main_input_filename);
- }
- }
- #endif
- #ifdef SDB_DEBUGGING_INFO
- if (write_symbols == SDB_DEBUG)
- sdbout_init (asm_out_file, main_input_filename);
- #endif
-
- /* Initialize yet another pass. */
-
- if (!been_here_before)
- init_final (main_input_filename);
-
- start_time = gettime ();
-
- /* Call the parser, which parses the entire file
- (calling rest_of_compilation for each function). */
-
- if (setjmp (toplevel) == 0)
- {
- if (yyparse () != 0)
- {
- if (errorcount == 0)
- {
- fprintf (stderr, "Errors detected in input file (your bison.simple is out of date)");
- errorcount = 1;
- }
- }
-
- /* 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;
- }
- else
- {
- /* Change by Bryan Boreham, Kewill, Sat Aug 5 19:05:44 1989.
- We'll be coming back later, so skip the finish.
- Modified by Michael Tiemann. */
-
- /* Compilation is now finished except for now. */
-
- parse_time += gettime () - start_time;
-
- parse_time -= integration_time;
- parse_time -= varconst_time;
-
- goto after_finish_compilation;
- }
-
- globals = getdecls ();
-
- /* 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. */
-
- {
- tree decl;
- 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_PUBLIC (decl)
- || TREE_ADDRESSABLE (decl)
- || TREE_ADDRESSABLE (DECL_NAME (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));
- #endif
- #ifdef SDB_DEBUGGING_INFO
- else if (DECL_INITIAL (decl) && write_symbols == SDB_DEBUG)
- TIMEVAR (varconst_time, sdbout_symbol (decl, 0));
- #endif
- }
- if (TREE_CODE (decl) == FUNCTION_DECL
- && ! TREE_ASM_WRITTEN (decl)
- && DECL_INITIAL (decl) != 0
- && (TREE_ADDRESSABLE (decl) || TREE_ADDRESSABLE (DECL_NAME (decl)))
- && ! TREE_EXTERNAL (decl))
- output_inline_function (decl);
-
- /* Warn about any function or variable
- declared static but not defined. */
- if ((warn_unused || TREE_USED (decl) || TREE_USED (DECL_NAME (decl)))
- /* && TREE_CODE (decl) == FUNCTION_DECL */
- && DECL_INITIAL (decl) == 0
- && TREE_EXTERNAL (decl)
- && ! TREE_PUBLIC (decl))
- warning_with_decl (decl, "`%s' declared `static' but never defined");
- /* Warn about static fns or vars defined but not used,
- but not about inline functions
- since unused inline statics is normal practice. */
- if (warn_unused
- && (TREE_CODE (decl) == FUNCTION_DECL
- || TREE_CODE (decl) == VAR_DECL)
- && ! TREE_EXTERNAL (decl)
- && ! TREE_PUBLIC (decl)
- && ! TREE_USED (decl)
- && ! TREE_INLINE (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");
- }
- }
-
- /* Do dbx symbols */
- #ifdef DBX_DEBUGGING_INFO
- if (write_symbols == DBX_DEBUG)
- TIMEVAR (symout_time,
- {
- dbxout_tags (gettags ());
- dbxout_types (get_permanent_types ());
- });
- #endif
-
- #ifdef SDB_DEBUGGING_INFO
- if (write_symbols == SDB_DEBUG)
- TIMEVAR (symout_time,
- {
- sdbout_tags (gettags ());
- sdbout_types (get_permanent_types ());
- });
- #endif
-
- #if 0 /* This mode is discontinued */
- /* Do gdb symbols */
- if (write_symbols == GDB_DEBUG)
- TIMEVAR (symout_time,
- {
- struct stat statbuf;
- fstat (fileno (finput), &statbuf);
- symout_types (get_permanent_types ());
- symout_top_blocks (globals, gettags ());
- symout_finish (name, statbuf.st_ctime);
- });
- #endif /* 0 */
-
- /* Output some stuff at end of file if nec. */
-
- end_final (main_input_filename);
-
- #ifdef ASM_FILE_END
- ASM_FILE_END (asm_out_file);
- #endif
-
- after_finish_compilation:
-
- /* Close the dump files. */
-
- if (rtl_dump)
- fclose (rtl_dump_file);
-
- if (jump_opt_dump)
- fclose (jump_opt_dump_file);
-
- if (cse_dump)
- fclose (cse_dump_file);
-
- if (loop_dump)
- fclose (loop_dump_file);
-
- if (flow_dump)
- fclose (flow_dump_file);
-
- if (combine_dump)
- {
- dump_combine_total_stats (combine_dump_file);
- fclose (combine_dump_file);
- }
-
- if (local_reg_dump)
- fclose (local_reg_dump_file);
-
- if (global_reg_dump)
- fclose (global_reg_dump_file);
-
- if (jump2_opt_dump)
- fclose (jump2_opt_dump_file);
-
- if (dbr_sched_dump)
- 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. */
-
- fclose (finput);
- if (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0)
- fatal_io_error (asm_file_name);
-
- /* Print the times. */
-
- if (! quiet_flag)
- {
- fprintf (stderr,"\n");
- 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 ("shorten-branch", shorten_branch_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. */
-
- void
- rest_of_decl_compilation (decl, asmspec, top_level, at_end)
- tree decl;
- char *asmspec;
- int top_level;
- int at_end;
- {
- /* Declarations of variables, and of functions defined elsewhere. */
-
- if (TREE_STATIC (decl) || TREE_EXTERNAL (decl))
- TIMEVAR (varconst_time,
- {
- make_decl_rtl (decl, asmspec, top_level);
- /* Don't output anything
- 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)
- {
- if (TREE_CODE (decl) == PARM_DECL)
- error ("parameter cannot have special register declaration");
- else
- {
- DECL_RTL (decl) = 0;
- make_decl_rtl (decl, asmspec, top_level);
- }
- }
- else
- 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));
- #endif
- #ifdef SDB_DEBUGGING_INFO
- else if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == TYPE_DECL)
- TIMEVAR (varconst_time, sdbout_symbol (decl, 0));
- #endif
-
- if (top_level)
- {
- #if 0 /* This mode is discontinued */
- if (write_symbols == GDB_DEBUG)
- {
- TIMEVAR (symout_time,
- {
- /* 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 ());
- });
- }
- else
- #endif /* 0 */
- /* Clean out the temporary type list, since the types will go away. */
- get_temporary_types ();
- }
- }
-
- /* 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. */
-
- void
- rest_of_compilation (decl)
- tree decl;
- {
- register rtx insns;
- int start_time = gettime ();
- int tem;
-
- /* 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);
- if (lose != 0 && specd)
- warning_with_decl (decl, lose);
- if (lose == 0)
- save_for_inline (decl);
- else
- TREE_INLINE (decl) = 0;
- });
- }
-
- insns = get_insns ();
-
- /* Dump the rtl code if we are dumping rtl. */
-
- if (rtl_dump)
- TIMEVAR (dump_time,
- {
- 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);
- fflush (rtl_dump_file);
- });
-
- /* 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)
- || TREE_EXTERNAL (decl))
- && TREE_INLINE (decl))
- goto exit_rest_of_compilation;
- }
-
- TREE_ASM_WRITTEN (decl) = 1;
-
- if (rtl_dump_and_exit || flag_syntax_only)
- {
- get_temporary_types ();
- goto exit_rest_of_compilation;
- }
-
- insns = get_insns ();
-
- /* Copy any shared structure that should not be shared. */
-
- unshare_all_rtl (insns);
-
- /* 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. */
-
- if (jump_opt_dump)
- TIMEVAR (dump_time,
- {
- 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. */
-
- if (cse_dump)
- TIMEVAR (dump_time,
- {
- fprintf (cse_dump_file, "\n;; Function %s\n\n",
- IDENTIFIER_POINTER (DECL_NAME (decl)));
- });
-
- if (optimize)
- {
- TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 0));
-
- TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (), cse_dump_file));
-
- if (tem)
- TIMEVAR (jump_time, jump_optimize (insns, 0, 0));
- }
-
- /* Dump rtl code after cse, if we are doing that. */
-
- if (cse_dump)
- TIMEVAR (dump_time,
- {
- print_rtl (cse_dump_file, insns);
- fflush (cse_dump_file);
- });
-
- if (loop_dump)
- TIMEVAR (dump_time,
- {
- fprintf (loop_dump_file, "\n;; Function %s\n\n",
- IDENTIFIER_POINTER (DECL_NAME (decl)));
- });
-
- /* Move constant computations out of loops. */
-
- if (optimize)
- {
- TIMEVAR (loop_time,
- {
- 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. */
-
- if (loop_dump)
- TIMEVAR (dump_time,
- {
- print_rtl (loop_dump_file, insns);
- fflush (loop_dump_file);
- });
-
- /* 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. */
-
- regclass_init ();
-
- /* Print function header into flow dump now
- because doing the flow analysis makes some of the dump. */
-
- if (flow_dump)
- TIMEVAR (dump_time,
- {
- fprintf (flow_dump_file, "\n;; Function %s\n\n",
- IDENTIFIER_POINTER (DECL_NAME (decl)));
- });
-
- if (obey_regdecls)
- {
- TIMEVAR (flow_time,
- {
- regclass (insns, max_reg_num ());
- stupid_life_analysis (insns, max_reg_num (),
- flow_dump_file);
- });
- }
- else
- {
- /* Do control and data flow analysis,
- and write some of the results to dump file. */
-
- TIMEVAR (flow_time, flow_analysis (insns, max_reg_num (),
- flow_dump_file));
- if (extra_warnings)
- uninitialized_vars_warning (DECL_INITIAL (decl));
- }
-
- /* Dump rtl after flow analysis. */
-
- if (flow_dump)
- TIMEVAR (dump_time,
- {
- print_rtl (flow_dump_file, insns);
- fflush (flow_dump_file);
- });
-
- /* If -opt, try combining insns through substitution. */
-
- if (optimize)
- TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
-
- /* Dump rtl code after insn combination. */
-
- if (combine_dump)
- TIMEVAR (dump_time,
- {
- 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. */
-
- if (!obey_regdecls)
- TIMEVAR (local_alloc_time,
- {
- regclass (insns, max_reg_num ());
- local_alloc ();
- });
-
- /* Dump rtl code after allocating regs within basic blocks. */
-
- if (local_reg_dump)
- TIMEVAR (dump_time,
- {
- 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);
- });
-
- if (global_reg_dump)
- TIMEVAR (dump_time,
- 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,
- {
- if (!obey_regdecls)
- global_alloc (global_reg_dump ? global_reg_dump_file : 0);
- else
- reload (insns, 0,
- global_reg_dump ? global_reg_dump_file : 0);
- });
-
- if (global_reg_dump)
- TIMEVAR (dump_time,
- {
- 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;
- reload_completed = 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. */
-
- if (optimize)
- {
- TIMEVAR (jump_time, jump_optimize (insns, 1, 1));
- }
-
- /* Dump rtl code after jump, if we are doing that. */
-
- if (jump2_opt_dump)
- TIMEVAR (dump_time,
- {
- 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));
- if (dbr_sched_dump)
- {
- TIMEVAR (dump_time,
- {
- 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);
- });
- }
- }
- #endif
-
- #if 0
- if (optimize)
- /* Shorten branches. */
- TIMEVAR (shorten_branch_time,
- {
- shorten_branches (get_insns ());
- });
- #endif
-
- /* Now turn the rtl into assembler code. */
-
- TIMEVAR (final_time,
- {
- 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);
- fflush (asm_out_file);
- });
-
- #if 0 /* This mode is discontinued */
- /* Write GDB symbols if requested */
-
- if (write_symbols == GDB_DEBUG)
- {
- TIMEVAR (symout_time,
- {
- symout_types (get_permanent_types ());
- symout_types (get_temporary_types ());
-
- DECL_BLOCK_SYMTAB_ADDRESS (decl)
- = symout_function (DECL_INITIAL (decl),
- DECL_ARGUMENTS (decl), 0);
- symout_function_end ();
- });
- }
- else
- #endif /* 0 */
- get_temporary_types ();
-
- /* Write DBX symbols if requested */
-
- #ifdef DBX_DEBUGGING_INFO
- if (write_symbols == DBX_DEBUG)
- TIMEVAR (symout_time, dbxout_function (decl));
- #endif
-
- exit_rest_of_compilation:
-
- rtx_equal_function_value_matters = 0;
- reload_completed = 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;
- }
-
- /* Hacky routine to read back entire data segment saved earlier.
- Bryan Boreham (bryan@kewill.uucp) */
-
- void undump_data (name)
- char *name;
- {
- int file;
- long file_size;
- extern int my_edata;
- char buf[256] = "/usr/local/lib/";
-
- strcat (buf, name);
-
- if ((file = open(name, O_RDONLY)) == -1)
- if ((file = open(buf, O_RDONLY)) == -1)
- {
- perror(name);
- return;
- }
- file_size = lseek(file, 0L, SEEK_END);
- lseek(file, 0L, SEEK_SET);
- brk((char*)(&my_edata) + file_size);
- if (read (file, &my_edata, file_size) != file_size)
- perror(name);
- }
-
- /* Entry point of c++. 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. */
-
- int
- main (argc, argv, envp)
- int argc;
- char **argv;
- char **envp;
- {
- register int i;
- char *filename = 0;
- int print_mem_flag = 0;
- char *p;
-
- /* save in case md file wants to emit args as a comment. */
- save_argc = argc;
- save_argv = argv;
-
- p = argv[0] + strlen (argv[0]);
- while (p != argv[0] && p[-1] != '/') --p;
- progname = p;
-
- /* Change by Bryan Boreham, Kewill, Sun Aug 6 13:42:47 1989.
- Stuff for unexec'ing */
- dump_source_name = argv[0];
- asm_file_name = (char*) 0;
-
- #ifdef RLIMIT_STACK
- /* Get rid of any avoidable limit on stack size. */
- {
- struct rlimit rlim;
-
- /* 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);
-
- decl_printable_name = decl_name;
- lang_expand_expr = fancy_abort;
-
- /* 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;
- #endif
-
- /* This is zeroed by -O. */
- obey_regdecls = 1;
-
- /* Initialize register usage now so switches may override. */
- init_reg_sets ();
-
- target_flags = 0;
- set_target_switch ("");
-
- for (i = 1; i < argc; i++)
- if (argv[i][0] == '-' && argv[i][1] != 0)
- {
- register char *str = argv[i] + 1;
- if (str[0] == 'Y')
- str++;
-
- if (str[0] == 'm')
- set_target_switch (&str[1]);
- else if (!strcmp (str, "dumpbase"))
- {
- dump_base_name = argv[++i];
- }
- else if (str[0] == 'd')
- {
- register char *p = &str[1];
- while (*p)
- switch (*p++)
- {
- case 'c':
- combine_dump = 1;
- break;
- case 'd':
- dbr_sched_dump = 1;
- break;
- case 'f':
- flow_dump = 1;
- break;
- case 'g':
- global_reg_dump = 1;
- break;
- case 'j':
- jump_opt_dump = 1;
- break;
- case 'J':
- jump2_opt_dump = 1;
- break;
- case 'l':
- local_reg_dump = 1;
- break;
- case 'L':
- loop_dump = 1;
- break;
- case 'm':
- print_mem_flag = 1;
- break;
- case 'r':
- rtl_dump = 1;
- break;
- case 's':
- cse_dump = 1;
- break;
- case 'y':
- yydebug = 1;
- break;
- case 'x':
- rtl_dump_and_exit = 1;
- break;
- }
- }
- else if (str[0] == 'f')
- {
- int j;
- register char *p = &str[1];
- int found = 0;
-
- /* Some kind of -f option.
- P's value is the option sans `-f'.
- Search for it in the table of options. */
-
- for (j = 0;
- !found && j < sizeof (f_options) / sizeof (f_options[0]);
- j++)
- {
- 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. */
- found = 1;
- }
- 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;
- found = 1;
- }
- }
-
- if (found)
- ;
- else if (!strncmp (p, "undump-", 7))
- undump_data (&p[7]);
- 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"))
- pedantic = 1;
- else if (lang_decode_option (argv[i]))
- ;
- else if (!strcmp (str, "quiet"))
- quiet_flag = 1;
- else if (!strcmp (str, "version"))
- {
- extern char *version_string, *language_string;
- fprintf (stderr, "%s version %s", language_string, version_string);
- #ifdef TARGET_VERSION
- TARGET_VERSION;
- #endif
- #ifdef __GNUC__
- #ifndef __VERSION__
- #define __VERSION__ "[unknown]"
- #endif
- fprintf (stderr, " compiled by GNU C version %s.\n", __VERSION__);
- #else
- fprintf (stderr, " compiled by CC.\n");
- #endif
- print_target_switch_defaults ();
- }
- else if (!strcmp (str, "w"))
- inhibit_warnings = 1;
- else if (!strcmp (str, "W"))
- extra_warnings = 1;
- else if (!strcmp (str, "Wunused"))
- warn_unused = 1;
- else if (!strcmp (str, "Wshadow"))
- warn_shadow = 1;
- else if (!strcmp (str, "Wswitch"))
- warn_switch = 1;
- else if (!strcmp (str, "Wconversion"))
- warn_conversion = 1;
- else if (!strncmp (str, "Wid-clash-", 10))
- {
- char *endp = str + 10;
-
- while (*endp)
- {
- if (*endp >= '0' && *endp <= '9')
- endp++;
- else
- error ("Invalid option `%s'", argv[i]);
- }
- warn_id_clash = 1;
- id_clash_len = atoi (str + 10);
- }
- else if (!strcmp (str, "p"))
- profile_flag = 1;
- else if (!strcmp (str, "a"))
- {
- #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
- warning ("`-a' option (basic block profile) not supported");
- #else
- profile_block_flag = 1;
- #endif
- }
- #ifdef 0
- else if (!strcmp (str, "gg"))
- write_symbols = GDB_DEBUG;
- #endif
- #ifdef DBX_DEBUGGING_INFO
- else if (!strcmp (str, "g0"))
- write_symbols = DBX_DEBUG;
- else if (!strcmp (str, "G0"))
- write_symbols = DBX_DEBUG;
- #ifdef SDB_DEBUGGING_INFO
- else if (!strcmp (str, "gsdb"))
- write_symbols = SDB_DEBUG;
- #endif
- 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;
- }
- #endif /* DBX_DEBUGGING_INFO */
- #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, "gsdb"))
- write_symbols = SDB_DEBUG;
- #endif /* SDB_DEBUGGING_INFO */
- #if 0
- else if (!strcmp (str, "symout"))
- {
- if (write_symbols == NO_DEBUG)
- write_symbols = GDB_DEBUG;
- sym_file_name = argv[++i];
- }
- #endif /* 0 */
- else if (!strcmp (str, "o"))
- {
- asm_file_name = argv[++i];
- }
- else
- error ("Invalid option `%s'", argv[i]);
- }
- else if (argv[i][0] == '+')
- {
- if (lang_decode_option (argv[i]))
- ;
- else
- error ("Invalid option `%s'", argv[i]);
- }
- else
- filename = argv[i];
-
- #ifdef OVERRIDE_OPTIONS
- /* Some machines may reject certain combinations of options. */
- OVERRIDE_OPTIONS;
- #endif
-
- /* Now that register usage is specified, convert it to HARD_REG_SETs. */
- init_reg_sets_1 ();
-
- compile_file (filename);
-
- #ifndef USG
- #ifndef VMS
- if (print_mem_flag)
- {
- extern char **environ;
- char *lim = (char *) sbrk (0);
-
- fprintf (stderr, "Data size %d.\n",
- (int) lim - (int) &environ);
- fflush (stderr);
-
- system ("ps v");
- }
- #endif /* not VMS */
- #endif /* not USG */
-
- if (errorcount)
- exit (FATAL_EXIT_CODE);
- if (sorrycount)
- exit (FATAL_EXIT_CODE);
- exit (SUCCESS_EXIT_CODE);
- return 34;
- }
-
- /* 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 []
- = TARGET_SWITCHES;
-
- /* Decode the switch -mNAME. */
-
- void
- set_target_switch (name)
- char *name;
- {
- register int j;
- int valid = 0;
-
- 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;
- else
- target_flags |= target_switches[j].value;
- valid = 1;
- }
-
- if (!valid)
- error ("Invalid option `%s'", name);
- }
-
- /* Print default target switches for -version. */
-
- void
- print_target_switch_defaults ()
- {
- register int j;
- 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);
-
- fprintf (stderr, "\n");
- }
-