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