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649 lines
20 KiB
C
649 lines
20 KiB
C
/* Compilation switch flag definitions for GCC.
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Copyright (C) 1987, 1988, 1994, 1995, 1996, 1997, 1998, 1999, 2000
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Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#ifndef GCC_FLAGS_H
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#define GCC_FLAGS_H
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/* Name of the input .c file being compiled. */
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extern const char *main_input_filename;
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enum debug_info_type
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{
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NO_DEBUG, /* Write no debug info. */
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DBX_DEBUG, /* Write BSD .stabs for DBX (using dbxout.c). */
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SDB_DEBUG, /* Write COFF for (old) SDB (using sdbout.c). */
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DWARF_DEBUG, /* Write Dwarf debug info (using dwarfout.c). */
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DWARF2_DEBUG, /* Write Dwarf v2 debug info (using dwarf2out.c). */
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XCOFF_DEBUG, /* Write IBM/Xcoff debug info (using dbxout.c). */
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VMS_DEBUG, /* Write VMS debug info (using vmsdbgout.c). */
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VMS_AND_DWARF2_DEBUG /* Write VMS debug info (using vmsdbgout.c).
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and DWARF v2 debug info (using dwarf2out.c). */
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};
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/* Specify which kind of debugging info to generate. */
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extern enum debug_info_type write_symbols;
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enum debug_info_level
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{
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DINFO_LEVEL_NONE, /* Write no debugging info. */
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DINFO_LEVEL_TERSE, /* Write minimal info to support tracebacks only. */
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DINFO_LEVEL_NORMAL, /* Write info for all declarations (and line table). */
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DINFO_LEVEL_VERBOSE /* Write normal info plus #define/#undef info. */
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};
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/* Specify how much debugging info to generate. */
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extern enum debug_info_level debug_info_level;
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/* Nonzero means use GNU-only extensions in the generated symbolic
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debugging information. */
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extern int use_gnu_debug_info_extensions;
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/* Nonzero means do optimizations. -opt. */
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extern int optimize;
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/* Nonzero means optimize for size. -Os. */
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extern int optimize_size;
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/* Don't print functions as they are compiled and don't print
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times taken by the various passes. -quiet. */
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extern int quiet_flag;
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/* Print times taken by the various passes. -ftime-report. */
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extern int time_report;
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/* Print memory still in use at end of compilation (which may have little
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to do with peak memory consumption). -fmem-report. */
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extern int mem_report;
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/* Don't print warning messages. -w. */
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extern int inhibit_warnings;
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/* Don't suppress warnings from system headers. -Wsystem-headers. */
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extern int warn_system_headers;
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/* Do print extra warnings (such as for uninitialized variables). -W. */
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extern int extra_warnings;
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/* Nonzero to warn about unused variables, functions et.al. Use
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set_Wunused() to update the -Wunused-* flags that correspond to the
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-Wunused option. */
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extern void set_Wunused PARAMS ((int setting));
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extern int warn_unused_function;
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extern int warn_unused_label;
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extern int warn_unused_parameter;
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extern int warn_unused_variable;
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extern int warn_unused_value;
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/* Nonzero to warn about code which is never reached. */
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extern int warn_notreached;
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/* Nonzero means warn if inline function is too large. */
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extern int warn_inline;
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/* Nonzero to warn about variables used before they are initialized. */
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extern int warn_uninitialized;
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/* Zero if unknown pragmas are ignored
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One if the compiler should warn about an unknown pragma not in
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a system include file.
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Greater than one if the compiler should warn for all unknown
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pragmas. */
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extern int warn_unknown_pragmas;
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/* Nonzero means warn about all declarations which shadow others. */
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extern int warn_shadow;
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/* Warn if a switch on an enum fails to have a case for every enum value. */
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extern int warn_switch;
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/* Nonzero means warn about function definitions that default the return type
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or that use a null return and have a return-type other than void. */
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extern int warn_return_type;
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/* Warn about functions which might be candidates for attribute noreturn. */
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extern int warn_missing_noreturn;
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/* Nonzero means warn about pointer casts that increase the required
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alignment of the target type (and might therefore lead to a crash
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due to a misaligned access). */
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extern int warn_cast_align;
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/* Nonzero means warn about any objects definitions whose size is larger
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than N bytes. Also want about function definitions whose returned
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values are larger than N bytes. The value N is in `larger_than_size'. */
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extern int warn_larger_than;
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extern HOST_WIDE_INT larger_than_size;
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/* Warn if a function returns an aggregate,
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since there are often incompatible calling conventions for doing this. */
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extern int warn_aggregate_return;
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/* Warn if packed attribute on struct is unnecessary and inefficient. */
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extern int warn_packed;
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/* Warn when gcc pads a structure to an alignment boundary. */
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extern int warn_padded;
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/* Warn when an optimization pass is disabled. */
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extern int warn_disabled_optimization;
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/* Nonzero means warn about uses of __attribute__((deprecated))
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declarations. */
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extern int warn_deprecated_decl;
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/* Nonzero if generating code to do profiling. */
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extern int profile_flag;
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/* Nonzero if generating code to profile program flow graph arcs. */
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extern int profile_arc_flag;
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/* Nonzero if generating info for gcov to calculate line test coverage. */
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extern int flag_test_coverage;
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/* Nonzero indicates that branch taken probabilities should be calculated. */
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extern int flag_branch_probabilities;
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/* Nonzero if basic blocks should be reordered. */
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extern int flag_reorder_blocks;
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/* Nonzero if registers should be renamed. */
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extern int flag_rename_registers;
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/* Nonzero for -pedantic switch: warn about anything
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that standard C forbids. */
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extern int pedantic;
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/* Temporarily suppress certain warnings.
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This is set while reading code from a system header file. */
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extern int in_system_header;
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/* Nonzero for -dp: annotate the assembly with a comment describing the
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pattern and alternative used. */
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extern int flag_print_asm_name;
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/* Now the symbols that are set with `-f' switches. */
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/* Nonzero means `char' should be signed. */
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extern int flag_signed_char;
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/* Nonzero means give an enum type only as many bytes as it needs. */
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extern int flag_short_enums;
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/* Nonzero for -fcaller-saves: allocate values in regs that need to
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be saved across function calls, if that produces overall better code.
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Optional now, so people can test it. */
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extern int flag_caller_saves;
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/* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
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extern int flag_pcc_struct_return;
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/* Nonzero for -fforce-mem: load memory value into a register
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before arithmetic on it. This makes better cse but slower compilation. */
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extern int flag_force_mem;
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/* Nonzero for -fforce-addr: load memory address into a register before
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reference to memory. This makes better cse but slower compilation. */
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extern int flag_force_addr;
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/* Nonzero for -fdefer-pop: don't pop args after each function call;
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instead save them up to pop many calls' args with one insns. */
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extern int flag_defer_pop;
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/* Nonzero for -ffloat-store: don't allocate floats and doubles
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in extended-precision registers. */
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extern int flag_float_store;
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/* Nonzero enables strength-reduction in loop.c. */
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extern int flag_strength_reduce;
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/* Nonzero enables loop unrolling in unroll.c. Only loops for which the
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number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
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UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
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unrolled. */
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extern int flag_unroll_loops;
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/* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
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This is generally not a win. */
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extern int flag_unroll_all_loops;
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/* Nonzero forces all invariant computations in loops to be moved
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outside the loop. */
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extern int flag_move_all_movables;
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/* Nonzero enables prefetch optimizations for arrays in loops. */
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extern int flag_prefetch_loop_arrays;
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/* Nonzero forces all general induction variables in loops to be
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strength reduced. */
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extern int flag_reduce_all_givs;
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/* Nonzero for -fcse-follow-jumps:
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have cse follow jumps to do a more extensive job. */
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extern int flag_cse_follow_jumps;
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/* Nonzero for -fcse-skip-blocks:
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have cse follow a branch around a block. */
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extern int flag_cse_skip_blocks;
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/* Nonzero for -fexpensive-optimizations:
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perform miscellaneous relatively-expensive optimizations. */
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extern int flag_expensive_optimizations;
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/* Nonzero for -fwritable-strings:
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store string constants in data segment and don't uniquize them. */
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extern int flag_writable_strings;
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/* Nonzero means don't put addresses of constant functions in registers.
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Used for compiling the Unix kernel, where strange substitutions are
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done on the assembly output. */
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extern int flag_no_function_cse;
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/* Nonzero for -fomit-frame-pointer:
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don't make a frame pointer in simple functions that don't require one. */
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extern int flag_omit_frame_pointer;
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/* Nonzero to inhibit use of define_optimization peephole opts. */
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extern int flag_no_peephole;
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/* Nonzero means all references through pointers are volatile. */
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extern int flag_volatile;
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/* Nonzero means treat all global and extern variables as volatile. */
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extern int flag_volatile_global;
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/* Nonzero means treat all static variables as volatile. */
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extern int flag_volatile_static;
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/* Nonzero allows GCC to optimize sibling and tail recursive calls. */
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extern int flag_optimize_sibling_calls;
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/* Nonzero means the front end generally wants `errno' maintained by math
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operations, like built-in SQRT. */
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extern int flag_errno_math;
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/* Nonzero means that unsafe floating-point math optimizations are allowed
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for the sake of speed. IEEE compliance is not guaranteed, and operations
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are allowed to assume that their arguments and results are "normal"
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(e.g., nonnegative for SQRT). */
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extern int flag_unsafe_math_optimizations;
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/* Zero means that floating-point math operations cannot generate a
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(user-visible) trap. This is the case, for example, in nonstop
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IEEE 754 arithmetic. */
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extern int flag_trapping_math;
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/* 0 means straightforward implementation of complex divide acceptable.
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1 means wide ranges of inputs must work for complex divide.
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2 means C99-like requirements for complex divide (not yet implemented). */
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extern int flag_complex_divide_method;
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/* Nonzero means to run loop optimizations twice. */
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extern int flag_rerun_loop_opt;
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/* Nonzero means make functions that look like good inline candidates
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go inline. */
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extern int flag_inline_functions;
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/* Nonzero for -fkeep-inline-functions: even if we make a function
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go inline everywhere, keep its definition around for debugging
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purposes. */
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extern int flag_keep_inline_functions;
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/* Nonzero means that functions declared `inline' will be treated
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as `static'. Prevents generation of zillions of copies of unused
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static inline functions; instead, `inlines' are written out
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only when actually used. Used in conjunction with -g. Also
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does the right thing with #pragma interface. */
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extern int flag_no_inline;
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/* Nonzero means that we don't want inlining by virtue of -fno-inline,
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not just because the tree inliner turned us off. */
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extern int flag_really_no_inline;
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/* Nonzero if we are only using compiler to check syntax errors. */
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extern int flag_syntax_only;
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/* Nonzero means we should save auxiliary info into a .X file. */
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extern int flag_gen_aux_info;
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/* Nonzero means make the text shared if supported. */
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extern int flag_shared_data;
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/* flag_schedule_insns means schedule insns within basic blocks (before
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local_alloc).
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flag_schedule_insns_after_reload means schedule insns after
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global_alloc. */
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extern int flag_schedule_insns;
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extern int flag_schedule_insns_after_reload;
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/* The following flags have effect only for scheduling before register
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allocation:
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flag_schedule_interblock means schedule insns accross basic blocks.
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flag_schedule_speculative means allow speculative motion of non-load insns.
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flag_schedule_speculative_load means allow speculative motion of some
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load insns.
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flag_schedule_speculative_load_dangerous allows speculative motion of more
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load insns. */
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extern int flag_schedule_interblock;
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extern int flag_schedule_speculative;
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extern int flag_schedule_speculative_load;
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extern int flag_schedule_speculative_load_dangerous;
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/* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple
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by a cheaper branch, on a count register. */
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extern int flag_branch_on_count_reg;
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/* This option is set to 1 on -fsingle-precision-constant option which is
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used to convert the floating point constants to single precision
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constants. */
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extern int flag_single_precision_constant;
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/* Nonzero means put things in delayed-branch slots if supported. */
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extern int flag_delayed_branch;
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/* Nonzero means suppress output of instruction numbers and line number
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notes in debugging dumps. */
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extern int flag_dump_unnumbered;
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/* Nonzero means pretend it is OK to examine bits of target floats,
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even if that isn't true. The resulting code will have incorrect constants,
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but the same series of instructions that the native compiler would make. */
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extern int flag_pretend_float;
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/* Nonzero means change certain warnings into errors.
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Usually these are warnings about failure to conform to some standard. */
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extern int flag_pedantic_errors;
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/* Nonzero means generate position-independent code.
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This is not fully implemented yet. */
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extern int flag_pic;
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/* Nonzero means generate extra code for exception handling and enable
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exception handling. */
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extern int flag_exceptions;
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/* Nonzero means generate frame unwind info table when supported */
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extern int flag_unwind_tables;
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/* Nonzero means generate frame unwind info table exact at each insn boundary */
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extern int flag_asynchronous_unwind_tables;
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/* Nonzero means don't place uninitialized global data in common storage
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by default. */
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extern int flag_no_common;
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/* -finhibit-size-directive inhibits output of .size for ELF.
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This is used only for compiling crtstuff.c,
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and it may be extended to other effects
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needed for crtstuff.c on other systems. */
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extern int flag_inhibit_size_directive;
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/* Nonzero means place each function into its own section on those platforms
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which support arbitrary section names and unlimited numbers of sections. */
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extern int flag_function_sections;
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/* ... and similar for data. */
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extern int flag_data_sections;
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/* -fverbose-asm causes extra commentary information to be produced in
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the generated assembly code (to make it more readable). This option
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is generally only of use to those who actually need to read the
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generated assembly code (perhaps while debugging the compiler itself).
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-fno-verbose-asm, the default, causes the extra information
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to not be added and is useful when comparing two assembler files. */
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extern int flag_verbose_asm;
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/* -dA causes debug information to be produced in
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the generated assembly code (to make it more readable). This option
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is generally only of use to those who actually need to read the
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generated assembly code (perhaps while debugging the compiler itself).
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Currently, this switch is only used by dwarfout.c; however, it is intended
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to be a catchall for printing debug information in the assembler file. */
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extern int flag_debug_asm;
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extern int flag_dump_rtl_in_asm;
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/* -fgnu-linker specifies use of the GNU linker for initializations.
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-fno-gnu-linker says that collect will be used. */
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extern int flag_gnu_linker;
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/* Tag all structures with __attribute__(packed) */
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extern int flag_pack_struct;
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/* This flag is only tested if alias checking is enabled.
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0 if pointer arguments may alias each other. True in C.
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1 if pointer arguments may not alias each other but may alias
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global variables.
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2 if pointer arguments may not alias each other and may not
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alias global variables. True in Fortran.
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The value is ignored if flag_alias_check is 0. */
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extern int flag_argument_noalias;
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/* Nonzero if we should do (language-dependent) alias analysis.
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Typically, this analysis will assume that expressions of certain
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types do not alias expressions of certain other types. Only used
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if alias analysis (in general) is enabled. */
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extern int flag_strict_aliasing;
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/* Emit code to probe the stack, to help detect stack overflow; also
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may cause large objects to be allocated dynamically. */
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extern int flag_stack_check;
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/* Do the full regmove optimization pass. */
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extern int flag_regmove;
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/* Instrument functions with calls at entry and exit, for profiling. */
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extern int flag_instrument_function_entry_exit;
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/* Perform a peephole pass before sched2. */
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extern int flag_peephole2;
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/* Try to guess branch probablities. */
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extern int flag_guess_branch_prob;
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/* -fbounded-pointers causes gcc to compile pointers as composite
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objects occupying three words: the pointer value, the base address
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of the referent object, and the address immediately beyond the end
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of the referent object. The base and extent allow us to perform
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runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
|
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extern int flag_bounded_pointers;
|
||
|
||
/* -fcheck-bounds causes gcc to generate array bounds checks.
|
||
For C, C++: defaults to value of flag_bounded_pointers.
|
||
For ObjC: defaults to off.
|
||
For Java: defaults to on.
|
||
For Fortran: defaults to off.
|
||
For CHILL: defaults to off. */
|
||
extern int flag_bounds_check;
|
||
|
||
/* This will attempt to merge constant section constants, if 1 only
|
||
string constants and constants from constant pool, if 2 also constant
|
||
variables. */
|
||
extern int flag_merge_constants;
|
||
|
||
/* If one, renumber instruction UIDs to reduce the number of
|
||
unused UIDs if there are a lot of instructions. If greater than
|
||
one, unconditionally renumber instruction UIDs. */
|
||
extern int flag_renumber_insns;
|
||
|
||
/* Other basic status info about current function. */
|
||
|
||
/* Nonzero means current function must be given a frame pointer.
|
||
Set in stmt.c if anything is allocated on the stack there.
|
||
Set in reload1.c if anything is allocated on the stack there. */
|
||
|
||
extern int frame_pointer_needed;
|
||
|
||
/* Nonzero if the generated code should trap on signed overflow
|
||
for PLUS / SUB / MULT. */
|
||
extern int flag_trapv;
|
||
|
||
/* Value of the -G xx switch, and whether it was passed or not. */
|
||
extern int g_switch_value;
|
||
extern int g_switch_set;
|
||
|
||
/* Values of the -falign-* flags: how much to align labels in code.
|
||
0 means `use default', 1 means `don't align'.
|
||
For each variable, there is an _log variant which is the power
|
||
of two not less than the variable, for .align output. */
|
||
|
||
extern int align_loops;
|
||
extern int align_loops_log;
|
||
extern int align_loops_max_skip;
|
||
extern int align_jumps;
|
||
extern int align_jumps_log;
|
||
extern int align_jumps_max_skip;
|
||
extern int align_labels;
|
||
extern int align_labels_log;
|
||
extern int align_labels_max_skip;
|
||
extern int align_functions;
|
||
extern int align_functions_log;
|
||
|
||
/* Like align_functions_log above, but used by front-ends to force the
|
||
minimum function alignment. Zero means no alignment is forced. */
|
||
extern int force_align_functions_log;
|
||
|
||
/* Nonzero if we dump in VCG format, not plain text. */
|
||
extern int dump_for_graph;
|
||
|
||
/* Selection of the graph form. */
|
||
enum graph_dump_types
|
||
{
|
||
no_graph = 0,
|
||
vcg
|
||
};
|
||
extern enum graph_dump_types graph_dump_format;
|
||
|
||
/* Nonzero means ignore `#ident' directives. 0 means handle them.
|
||
On SVR4 targets, it also controls whether or not to emit a
|
||
string identifying the compiler. */
|
||
|
||
extern int flag_no_ident;
|
||
|
||
/* Nonzero if we want to perform enhanced load motion during gcse. */
|
||
|
||
extern int flag_gcse_lm;
|
||
|
||
/* Nonzero if we want to perform store motion after gcse. */
|
||
|
||
extern int flag_gcse_sm;
|
||
|
||
|
||
/* Nonzero means we should do dwarf2 duplicate elimination. */
|
||
|
||
extern int flag_eliminate_dwarf2_dups;
|
||
|
||
/* Non-zero means to collect statistics which might be expensive
|
||
and to print them when we are done. */
|
||
extern int flag_detailed_statistics;
|
||
|
||
/* Nonzero means enable synchronous exceptions for non-call instructions. */
|
||
extern int flag_non_call_exceptions;
|
||
|
||
#endif /* ! GCC_FLAGS_H */
|