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Diffstat (limited to 'lib/gcc/arm-eabi/4.6.x-google/plugin/include/target.def')
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diff --git a/lib/gcc/arm-eabi/4.6.x-google/plugin/include/target.def b/lib/gcc/arm-eabi/4.6.x-google/plugin/include/target.def new file mode 100644 index 0000000..756caf3 --- /dev/null +++ b/lib/gcc/arm-eabi/4.6.x-google/plugin/include/target.def @@ -0,0 +1,2866 @@ +/* Target hook definitions. + Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 + Free Software Foundation, Inc. + + This program 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 3, or (at your option) any + later version. + + This program 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 this program; see the file COPYING3. If not see + <http://www.gnu.org/licenses/>. + + In other words, you are welcome to use, share and improve this program. + You are forbidden to forbid anyone else to use, share and improve + what you give them. Help stamp out software-hoarding! */ + +/* The following macros should be provided by the including file: + + DEFHOOK(NAME, DOC, TYPE, PARAMS, INIT): Define a function-valued hook. + DEFHOOKPOD(DOC, TYPE, NAME, INIT): Define a piece-of-data 'hook'. */ + +/* Defaults for optional macros: + DEFHOOKPODX(NAME, TYPE, INIT): Like DEFHOOKPOD, but share documentation + with the previous 'hook'. */ +#ifndef DEFHOOKPODX +#define DEFHOOKPODX(NAME, TYPE, INIT) DEFHOOKPOD (NAME, 0, TYPE, INIT) +#endif + +/* HOOKSTRUCT(FRAGMENT): Declarator fragments to encapsulate all the + members into a struct gcc_target, which in turn contains several + sub-structs. */ +#ifndef HOOKSTRUCT +#define HOOKSTRUCT(FRAGMENT) +#endif +/* HOOK_VECTOR: Start a struct declaration, which then gets its own initializer. + HOOK_VECTOR_END: Close a struct declaration, providing a member declarator + name for nested use. */ +#ifndef HOOK_VECTOR_1 +#define HOOK_VECTOR_1(NAME, FRAGMENT) HOOKSTRUCT(FRAGMENT) +#endif +#define HOOK_VECTOR(INIT_NAME, SNAME) HOOK_VECTOR_1 (INIT_NAME, struct SNAME {) +#define HOOK_VECTOR_END(DECL_NAME) HOOK_VECTOR_1(,} DECL_NAME ;) + +HOOK_VECTOR (TARGET_INITIALIZER, gcc_target) + +/* FIXME: For pre-existing hooks, we can't place the documentation in the + documentation field here till we get permission from the FSF to include + it in GPLed software - the target hook documentation is so far only + available under the GFDL. */ + +/* A hook should generally be documented by a string in the DOC parameter, + which should contain texinfo markup. If the documentation is only available + under the GPL, but not under the GFDL, put it in a comment above the hook + definition. If the function declaration is available both under GPL and + GFDL, but the documentation is only available under the GFDL, put the + documentaton in tm.texi.in, heading with @hook <hookname> and closing + the paragraph with @end deftypefn / deftypevr as appropriate, and marking + the next autogenerated hook with @hook <hookname>. + In both these cases, leave the DOC string empty, i.e. "". + Sometimes, for some historic reason the function declaration + has to be documented differently + than what it is. In that case, use DEFHOOK_UNDOC to supress auto-generation + of documentation. DEFHOOK_UNDOC takes a DOC string which it ignores, so + you can put GPLed documentation string there if you have hopes that you + can clear the declaration & documentation for GFDL distribution later, + in which case you can then simply change the DEFHOOK_UNDOC to DEFHOOK + to turn on the autogeneration of the documentation. + + A documentation string of "*" means not to emit any documentation at all, + and is mainly used internally for DEFHOOK_UNDOC. It should generally not + be used otherwise, but it has its use for exceptional cases where automatic + documentation is not wanted, and the real documentation is elsewere, like + for TARGET_ASM_{,UN}ALIGNED_INT_OP, which are hooks only for implementation + purposes; they refer to structs, the components of which are documented as + separate hooks TARGET_ASM_{,UN}ALIGNED_[HSDT]I_OP. + A DOC string of 0 is for internal use of DEFHOOKPODX and special table + entries only. */ + +/* Functions that output assembler for the target. */ +#define HOOK_PREFIX "TARGET_ASM_" +HOOK_VECTOR (TARGET_ASM_OUT, asm_out) + +/* Opening and closing parentheses for asm expression grouping. */ +DEFHOOKPOD +(open_paren, + "", + const char *, "(") +DEFHOOKPODX (close_paren, const char *, ")") + +/* Assembler instructions for creating various kinds of integer object. */ +DEFHOOKPOD +(byte_op, + "", + const char *, "\t.byte\t") +DEFHOOKPOD (aligned_op, "*", struct asm_int_op, TARGET_ASM_ALIGNED_INT_OP) +DEFHOOKPOD (unaligned_op, "*", struct asm_int_op, TARGET_ASM_UNALIGNED_INT_OP) + +/* The maximum number of bytes to skip when applying + LABEL_ALIGN_AFTER_BARRIER. */ +DEFHOOK +(label_align_after_barrier_max_skip, + "", + int, (rtx label), + default_label_align_after_barrier_max_skip) + +/* The maximum number of bytes to skip when applying + LOOP_ALIGN. */ +DEFHOOK +(loop_align_max_skip, + "", + int, (rtx label), + default_loop_align_max_skip) + +/* The maximum number of bytes to skip when applying + LABEL_ALIGN. */ +DEFHOOK +(label_align_max_skip, + "", + int, (rtx label), + default_label_align_max_skip) + +/* The maximum number of bytes to skip when applying + JUMP_ALIGN. */ +DEFHOOK +(jump_align_max_skip, + "", + int, (rtx label), + default_jump_align_max_skip) + +/* Try to output the assembler code for an integer object whose + value is given by X. SIZE is the size of the object in bytes and + ALIGNED_P indicates whether it is aligned. Return true if + successful. Only handles cases for which BYTE_OP, ALIGNED_OP + and UNALIGNED_OP are NULL. */ +DEFHOOK +(integer, + "", + /* Only handles cases for which BYTE_OP, ALIGNED_OP and UNALIGNED_OP are + NULL. */ + bool, (rtx x, unsigned int size, int aligned_p), + default_assemble_integer) + +/* Output code that will globalize a label. */ +DEFHOOK +(globalize_label, + "", + void, (FILE *stream, const char *name), + default_globalize_label) + +/* Output code that will globalize a declaration. */ +DEFHOOK +(globalize_decl_name, + "", + void, (FILE *stream, tree decl), default_globalize_decl_name) + +/* Output code that will emit a label for unwind info, if this + target requires such labels. Second argument is the decl the + unwind info is associated with, third is a boolean: true if + this is for exception handling, fourth is a boolean: true if + this is only a placeholder for an omitted FDE. */ +DEFHOOK +(emit_unwind_label, + "", + void, (FILE *stream, tree decl, int for_eh, int empty), + default_emit_unwind_label) + +/* Output code that will emit a label to divide up the exception table. */ +DEFHOOK +(emit_except_table_label, + "", + void, (FILE *stream), + default_emit_except_table_label) + +/* Emit a directive for setting the personality for the function. */ +DEFHOOK +(emit_except_personality, + "If the target implements @code{TARGET_ASM_UNWIND_EMIT}, this hook may be\ + used to emit a directive to install a personality hook into the unwind\ + info. This hook should not be used if dwarf2 unwind info is used.", + void, (rtx personality), + NULL) + +/* Emit any directives required to unwind this instruction. */ +DEFHOOK +(unwind_emit, + "", + void, (FILE *stream, rtx insn), + NULL) + +DEFHOOKPOD +(unwind_emit_before_insn, + "True if the @code{TARGET_ASM_UNWIND_EMIT} hook should be called before\ + the assembly for @var{insn} has been emitted, false if the hook should\ + be called afterward.", + bool, true) + +/* Generate an internal label. + For now this is just a wrapper for ASM_GENERATE_INTERNAL_LABEL. */ +DEFHOOK_UNDOC +(generate_internal_label, + "", + void, (char *buf, const char *prefix, unsigned long labelno), + default_generate_internal_label) + +/* Output an internal label. */ +DEFHOOK +(internal_label, + "", + void, (FILE *stream, const char *prefix, unsigned long labelno), + default_internal_label) + +/* Output label for the constant. */ +DEFHOOK +(declare_constant_name, + "", + void, (FILE *file, const char *name, const_tree expr, HOST_WIDE_INT size), + default_asm_declare_constant_name) + +/* Emit a ttype table reference to a typeinfo object. */ +DEFHOOK +(ttype, + "", + bool, (rtx sym), + hook_bool_rtx_false) + +/* Emit an assembler directive to set visibility for the symbol + associated with the tree decl. */ +DEFHOOK +(assemble_visibility, + "", + void, (tree decl, int visibility), + default_assemble_visibility) + +/* Output the assembler code for entry to a function. */ +DEFHOOK +(function_prologue, + "", + void, (FILE *file, HOST_WIDE_INT size), + default_function_pro_epilogue) + +/* Output the assembler code for end of prologue. */ +DEFHOOK +(function_end_prologue, + "", + void, (FILE *file), + no_asm_to_stream) + +/* Output the assembler code for start of epilogue. */ +DEFHOOK +(function_begin_epilogue, + "", + void, (FILE *file), + no_asm_to_stream) + +/* Output the assembler code for function exit. */ +DEFHOOK +(function_epilogue, + "", + void, (FILE *file, HOST_WIDE_INT size), + default_function_pro_epilogue) + +/* Initialize target-specific sections. */ +DEFHOOK +(init_sections, + "", + void, (void), + hook_void_void) + +/* Tell assembler to change to section NAME with attributes FLAGS. + If DECL is non-NULL, it is the VAR_DECL or FUNCTION_DECL with + which this section is associated. */ +DEFHOOK +(named_section, + "", + void, (const char *name, unsigned int flags, tree decl), + default_no_named_section) + +/* Return preferred text (sub)section for function DECL. + Main purpose of this function is to separate cold, normal and hot + functions. STARTUP is true when function is known to be used only + at startup (from static constructors or it is main()). + EXIT is true when function is known to be used only at exit + (from static destructors). + Return NULL if function should go to default text section. */ +DEFHOOK +(function_section, + "", + section *, (tree decl, enum node_frequency freq, bool startup, bool exit), + default_function_section) + +/* Output the assembler code for function exit. */ +DEFHOOK +(function_switched_text_sections, + "Used by the target to emit any assembler directives or additional\ + labels needed when a function is partitioned between different\ + sections. Output should be written to @var{file}. The function\ + decl is available as @var{decl} and the new section is `cold' if\ + @var{new_is_cold} is @code{true}.", + void, (FILE *file, tree decl, bool new_is_cold), + default_function_switched_text_sections) + +/* Return a mask describing how relocations should be treated when + selecting sections. Bit 1 should be set if global relocations + should be placed in a read-write section; bit 0 should be set if + local relocations should be placed in a read-write section. */ +DEFHOOK +(reloc_rw_mask, + "", + int, (void), + default_reloc_rw_mask) + + /* Return a section for EXP. It may be a DECL or a constant. RELOC + is nonzero if runtime relocations must be applied; bit 1 will be + set if the runtime relocations require non-local name resolution. + ALIGN is the required alignment of the data. */ +DEFHOOK +(select_section, + "", + section *, (tree exp, int reloc, unsigned HOST_WIDE_INT align), + default_select_section) + +/* Return a section for X. MODE is X's mode and ALIGN is its + alignment in bits. */ +DEFHOOK +(select_rtx_section, + "", + section *, (enum machine_mode mode, rtx x, unsigned HOST_WIDE_INT align), + default_select_rtx_section) + +/* Select a unique section name for DECL. RELOC is the same as + for SELECT_SECTION. */ +DEFHOOK +(unique_section, + "", + void, (tree decl, int reloc), + default_unique_section) + +/* Return the readonly data section associated with function DECL. */ +DEFHOOK +(function_rodata_section, + "", + section *, (tree decl), + default_function_rodata_section) + +/* Output a constructor for a symbol with a given priority. */ +DEFHOOK +(constructor, + "", + void, (rtx symbol, int priority), NULL) + +/* Output a destructor for a symbol with a given priority. */ +DEFHOOK +(destructor, + "", + void, (rtx symbol, int priority), NULL) + +/* Output the assembler code for a thunk function. THUNK_DECL is the + declaration for the thunk function itself, FUNCTION is the decl for + the target function. DELTA is an immediate constant offset to be + added to THIS. If VCALL_OFFSET is nonzero, the word at + *(*this + vcall_offset) should be added to THIS. */ +DEFHOOK +(output_mi_thunk, + "", + void, (FILE *file, tree thunk_fndecl, HOST_WIDE_INT delta, + HOST_WIDE_INT vcall_offset, tree function), + NULL) + +/* Determine whether output_mi_thunk would succeed. */ +/* ??? Ideally, this hook would not exist, and success or failure + would be returned from output_mi_thunk directly. But there's + too much undo-able setup involved in invoking output_mi_thunk. + Could be fixed by making output_mi_thunk emit rtl instead of + text to the output file. */ +DEFHOOK +(can_output_mi_thunk, + "", + bool, (const_tree thunk_fndecl, HOST_WIDE_INT delta, + HOST_WIDE_INT vcall_offset, const_tree function), + hook_bool_const_tree_hwi_hwi_const_tree_false) + +/* Output any boilerplate text needed at the beginning of a + translation unit. */ +DEFHOOK +(file_start, + "", + void, (void), + default_file_start) + +/* Output any boilerplate text needed at the end of a translation unit. */ +DEFHOOK +(file_end, + "", + void, (void), + hook_void_void) + +/* Output any boilerplate text needed at the beginning of an + LTO output stream. */ +DEFHOOK +(lto_start, + "", + void, (void), + hook_void_void) + +/* Output any boilerplate text needed at the end of an + LTO output stream. */ +DEFHOOK +(lto_end, + "", + void, (void), + hook_void_void) + +/* Output any boilerplace text needed at the end of a + translation unit before debug and unwind info is emitted. */ +DEFHOOK +(code_end, + "", + void, (void), + hook_void_void) + +/* Output an assembler pseudo-op to declare a library function name + external. */ +DEFHOOK +(external_libcall, + "", + void, (rtx symref), + default_external_libcall) + +/* Output an assembler directive to mark decl live. This instructs + linker to not dead code strip this symbol. */ +DEFHOOK +(mark_decl_preserved, + "", + void, (const char *symbol), + hook_void_constcharptr) + +/* Output a record of the command line switches that have been passed. */ +DEFHOOK +(record_gcc_switches, + "", + int, (print_switch_type type, const char *text), + NULL) + +/* The name of the section that the example ELF implementation of + record_gcc_switches will use to store the information. Target + specific versions of record_gcc_switches may or may not use + this information. */ +DEFHOOKPOD +(record_gcc_switches_section, + "", + const char *, ".GCC.command.line") + +/* Output the definition of a section anchor. */ +DEFHOOK +(output_anchor, + "", + void, (rtx x), + default_asm_output_anchor) + +/* Output a DTP-relative reference to a TLS symbol. */ +DEFHOOK +(output_dwarf_dtprel, + "", + void, (FILE *file, int size, rtx x), + NULL) + +/* Some target machines need to postscan each insn after it is output. */ +DEFHOOK +(final_postscan_insn, + "", + void, (FILE *file, rtx insn, rtx *opvec, int noperands), + NULL) + +/* Emit the trampoline template. This hook may be NULL. */ +DEFHOOK +(trampoline_template, + "", + void, (FILE *f), + NULL) + +DEFHOOK +(output_source_filename, + "Output COFF information or DWARF debugging information which indicates\ + that filename @var{name} is the current source file to the stdio\ + stream @var{file}.\n\ + \n\ + This target hook need not be defined if the standard form of output\ + for the file format in use is appropriate.", + void ,(FILE *file, const char *name), + default_asm_output_source_filename) + +DEFHOOK +(output_addr_const_extra, + "", + bool, (FILE *file, rtx x), + default_asm_output_addr_const_extra) + +/* ??? The TARGET_PRINT_OPERAND* hooks are part of the asm_out struct, + even though that is not reflected in the macro name to override their + initializers. */ +#undef HOOK_PREFIX +#define HOOK_PREFIX "TARGET_" + +/* Emit a machine-specific insn operand. */ +/* ??? tm.texi only documents the old macro PRINT_OPERAND, + not this hook, and uses a different name for the argument FILE. */ +DEFHOOK_UNDOC +(print_operand, + "", + void, (FILE *file, rtx x, int code), + default_print_operand) + +/* Emit a machine-specific memory address. */ +/* ??? tm.texi only documents the old macro PRINT_OPERAND_ADDRESS, + not this hook, and uses different argument names. */ +DEFHOOK_UNDOC +(print_operand_address, + "", + void, (FILE *file, rtx addr), + default_print_operand_address) + +/* Determine whether CODE is a valid punctuation character for the + `print_operand' hook. */ +/* ??? tm.texi only documents the old macro PRINT_OPERAND_PUNCT_VALID_P, + not this hook. */ +DEFHOOK_UNDOC +(print_operand_punct_valid_p, + "", + bool ,(unsigned char code), + default_print_operand_punct_valid_p) + +/* Given a symbol name, perform same mangling as assemble_name and + ASM_OUTPUT_LABELREF, returning result as an IDENTIFIER_NODE. */ +DEFHOOK +(mangle_assembler_name, + "Given a symbol @var{name}, perform same mangling as @code{varasm.c}'s\ + @code{assemble_name}, but in memory rather than to a file stream, returning\ + result as an @code{IDENTIFIER_NODE}. Required for correct LTO symtabs. The\ + default implementation calls the @code{TARGET_STRIP_NAME_ENCODING} hook and\ + then prepends the @code{USER_LABEL_PREFIX}, if any.", + tree, (const char *name), + default_mangle_assembler_name) + +HOOK_VECTOR_END (asm_out) + +/* Functions relating to instruction scheduling. All of these + default to null pointers, which haifa-sched.c looks for and handles. */ +#undef HOOK_PREFIX +#define HOOK_PREFIX "TARGET_SCHED_" +HOOK_VECTOR (TARGET_SCHED, sched) + +/* Given the current cost, COST, of an insn, INSN, calculate and + return a new cost based on its relationship to DEP_INSN through + the dependence LINK. The default is to make no adjustment. */ +DEFHOOK +(adjust_cost, + "", + int, (rtx insn, rtx link, rtx dep_insn, int cost), NULL) + +/* Adjust the priority of an insn as you see fit. Returns the new priority. */ +DEFHOOK +(adjust_priority, + "", + int, (rtx insn, int priority), NULL) + +/* Function which returns the maximum number of insns that can be + scheduled in the same machine cycle. This must be constant + over an entire compilation. The default is 1. */ +DEFHOOK +(issue_rate, + "", + int, (void), NULL) + +/* Calculate how much this insn affects how many more insns we + can emit this cycle. Default is they all cost the same. */ +DEFHOOK +(variable_issue, + "", + int, (FILE *file, int verbose, rtx insn, int more), NULL) + +/* Initialize machine-dependent scheduling code. */ +DEFHOOK +(init, + "", + void, (FILE *file, int verbose, int max_ready), NULL) + +/* Finalize machine-dependent scheduling code. */ +DEFHOOK +(finish, + "", + void, (FILE *file, int verbose), NULL) + + /* Initialize machine-dependent function wide scheduling code. */ +DEFHOOK +(init_global, + "", + void, (FILE *file, int verbose, int old_max_uid), NULL) + +/* Finalize machine-dependent function wide scheduling code. */ +DEFHOOK +(finish_global, + "", + void, (FILE *file, int verbose), NULL) + +/* Reorder insns in a machine-dependent fashion, in two different + places. Default does nothing. */ +DEFHOOK +(reorder, + "", + int, (FILE *file, int verbose, rtx *ready, int *n_readyp, int clock), NULL) + +DEFHOOK +(reorder2, + "", + int, (FILE *file, int verbose, rtx *ready, int *n_readyp, int clock), NULL) + +/* The following member value is a pointer to a function called + after evaluation forward dependencies of insns in chain given + by two parameter values (head and tail correspondingly). */ +DEFHOOK +(dependencies_evaluation_hook, + "", + void, (rtx head, rtx tail), NULL) + +/* The values of the following four members are pointers to functions + used to simplify the automaton descriptions. dfa_pre_cycle_insn and + dfa_post_cycle_insn give functions returning insns which are used to + change the pipeline hazard recognizer state when the new simulated + processor cycle correspondingly starts and finishes. The function + defined by init_dfa_pre_cycle_insn and init_dfa_post_cycle_insn are + used to initialize the corresponding insns. The default values of + the members result in not changing the automaton state when the + new simulated processor cycle correspondingly starts and finishes. */ + +DEFHOOK +(init_dfa_pre_cycle_insn, + "", + void, (void), NULL) + +DEFHOOK +(dfa_pre_cycle_insn, + "", + rtx, (void), NULL) + +DEFHOOK +(init_dfa_post_cycle_insn, + "", + void, (void), NULL) + +DEFHOOK +(dfa_post_cycle_insn, + "", + rtx, (void), NULL) + +/* The values of the following two members are pointers to + functions used to simplify the automaton descriptions. + dfa_pre_advance_cycle and dfa_post_advance_cycle are getting called + immediately before and after cycle is advanced. */ + +DEFHOOK +(dfa_pre_advance_cycle, + "", + void, (void), NULL) + +DEFHOOK +(dfa_post_advance_cycle, + "", + void, (void), NULL) + +/* The following member value is a pointer to a function returning value + which defines how many insns in queue `ready' will we try for + multi-pass scheduling. If the member value is nonzero and the + function returns positive value, the DFA based scheduler will make + multi-pass scheduling for the first cycle. In other words, we will + try to choose ready insn which permits to start maximum number of + insns on the same cycle. */ +DEFHOOK +(first_cycle_multipass_dfa_lookahead, + "", + int, (void), NULL) + +/* The following member value is pointer to a function controlling + what insns from the ready insn queue will be considered for the + multipass insn scheduling. If the hook returns zero for insn + passed as the parameter, the insn will be not chosen to be issued. */ +DEFHOOK +(first_cycle_multipass_dfa_lookahead_guard, + "", + int, (rtx insn), NULL) + +/* This hook prepares the target for a new round of multipass + scheduling. + DATA is a pointer to target-specific data used for multipass scheduling. + READY_TRY and N_READY represent the current state of search in the + optimization space. The target can filter out instructions that + should not be tried during current round by setting corresponding + elements in READY_TRY to non-zero. + FIRST_CYCLE_INSN_P is true if this is the first round of multipass + scheduling on current cycle. */ +DEFHOOK +(first_cycle_multipass_begin, + "", + void, (void *data, char *ready_try, int n_ready, bool first_cycle_insn_p), + NULL) + +/* This hook is called when multipass scheduling evaluates instruction INSN. + DATA is a pointer to target-specific data that can be used to record effects + of INSN on CPU that are not described in DFA. + READY_TRY and N_READY represent the current state of search in the + optimization space. The target can filter out instructions that + should not be tried after issueing INSN by setting corresponding + elements in READY_TRY to non-zero. + INSN is the instruction being evaluated. + PREV_DATA is a pointer to target-specific data corresponding + to a state before issueing INSN. */ +DEFHOOK +(first_cycle_multipass_issue, + "", + void, (void *data, char *ready_try, int n_ready, rtx insn, + const void *prev_data), NULL) + +/* This hook is called when multipass scheduling backtracks from evaluation of + instruction corresponding to DATA. + DATA is a pointer to target-specific data that stores the effects + of instruction from which the algorithm backtracks on CPU that are not + described in DFA. + READY_TRY and N_READY represent the current state of search in the + optimization space. The target can filter out instructions that + should not be tried after issueing INSN by setting corresponding + elements in READY_TRY to non-zero. */ +DEFHOOK +(first_cycle_multipass_backtrack, + "", + void, (const void *data, char *ready_try, int n_ready), NULL) + +/* This hook notifies the target about the result of the concluded current + round of multipass scheduling. + DATA is a pointer. + If DATA is non-NULL it points to target-specific data used for multipass + scheduling which corresponds to instruction at the start of the chain of + the winning solution. DATA is NULL when multipass scheduling cannot find + a good enough solution on current cycle and decides to retry later, + usually after advancing the cycle count. */ +DEFHOOK +(first_cycle_multipass_end, + "", + void, (const void *data), NULL) + +/* This hook is called to initialize target-specific data for multipass + scheduling after it has been allocated. + DATA is a pointer to target-specific data that stores the effects + of instruction from which the algorithm backtracks on CPU that are not + described in DFA. */ +DEFHOOK +(first_cycle_multipass_init, + "", + void, (void *data), NULL) + +/* This hook is called to finalize target-specific data for multipass + scheduling before it is deallocated. + DATA is a pointer to target-specific data that stores the effects + of instruction from which the algorithm backtracks on CPU that are not + described in DFA. */ +DEFHOOK +(first_cycle_multipass_fini, + "", + void, (void *data), NULL) + +/* The following member value is pointer to a function called by + the insn scheduler before issuing insn passed as the third + parameter on given cycle. If the hook returns nonzero, the + insn is not issued on given processors cycle. Instead of that, + the processor cycle is advanced. If the value passed through + the last parameter is zero, the insn ready queue is not sorted + on the new cycle start as usually. The first parameter passes + file for debugging output. The second one passes the scheduler + verbose level of the debugging output. The forth and the fifth + parameter values are correspondingly processor cycle on which + the previous insn has been issued and the current processor cycle. */ +DEFHOOK +(dfa_new_cycle, + "", + int, (FILE *dump, int verbose, rtx insn, int last_clock, + int clock, int *sort_p), + NULL) + +/* The following member value is a pointer to a function called by the + insn scheduler. It should return true if there exists a dependence + which is considered costly by the target, between the insn + DEP_PRO (&_DEP), and the insn DEP_CON (&_DEP). The first parameter is + the dep that represents the dependence between the two insns. The + second argument is the cost of the dependence as estimated by + the scheduler. The last argument is the distance in cycles + between the already scheduled insn (first parameter) and the + second insn (second parameter). */ +DEFHOOK +(is_costly_dependence, + "", + bool, (struct _dep *_dep, int cost, int distance), NULL) + +DEFHOOK_UNDOC +(adjust_cost_2, + "Given the current cost, @var{cost}, of an insn, @var{insn}, calculate and\ + return a new cost based on its relationship to @var{dep_insn} through the\ + dependence of weakness @var{dw}. The default is to make no adjustment.", + int, (rtx insn, int dep_type1, rtx dep_insn, int cost, int dw), NULL) + +/* The following member value is a pointer to a function called + by the insn scheduler. This hook is called to notify the backend + that new instructions were emitted. */ +DEFHOOK +(h_i_d_extended, + "", + void, (void), NULL) + +/* Next 5 functions are for multi-point scheduling. */ + +/* Allocate memory for scheduler context. */ +DEFHOOK +(alloc_sched_context, + "", + void *, (void), NULL) + +/* Fills the context from the local machine scheduler context. */ +DEFHOOK +(init_sched_context, + "", + void, (void *tc, bool clean_p), NULL) + +/* Sets local machine scheduler context to a saved value. */ +DEFHOOK +(set_sched_context, + "", + void, (void *tc), NULL) + +/* Clears a scheduler context so it becomes like after init. */ +DEFHOOK +(clear_sched_context, + "", + void, (void *tc), NULL) + +/* Frees the scheduler context. */ +DEFHOOK +(free_sched_context, + "", + void, (void *tc), NULL) + +/* The following member value is a pointer to a function called + by the insn scheduler. + The first parameter is an instruction, the second parameter is the type + of the requested speculation, and the third parameter is a pointer to the + speculative pattern of the corresponding type (set if return value == 1). + It should return + -1, if there is no pattern, that will satisfy the requested speculation type, + 0, if current pattern satisfies the requested speculation type, + 1, if pattern of the instruction should be changed to the newly + generated one. */ +DEFHOOK +(speculate_insn, + "", + int, (rtx insn, int request, rtx *new_pat), NULL) + +/* The following member value is a pointer to a function called + by the insn scheduler. It should return true if the check instruction + passed as the parameter needs a recovery block. */ +DEFHOOK +(needs_block_p, + "", + bool, (int dep_status), NULL) + +/* The following member value is a pointer to a function called + by the insn scheduler. It should return a pattern for the check + instruction. + The first parameter is a speculative instruction, the second parameter + is the label of the corresponding recovery block (or null, if it is a + simple check). If the mutation of the check is requested (e.g. from + ld.c to chk.a), the third parameter is true - in this case the first + parameter is the previous check. */ +DEFHOOK +(gen_spec_check, + "", + rtx, (rtx insn, rtx label, int mutate_p), NULL) + +/* The following member value is a pointer to a function controlling + what insns from the ready insn queue will be considered for the + multipass insn scheduling. If the hook returns zero for the insn + passed as the parameter, the insn will not be chosen to be + issued. This hook is used to discard speculative instructions, + that stand at the first position of the ready list. */ +DEFHOOK +(first_cycle_multipass_dfa_lookahead_guard_spec, + "", + bool, (const_rtx insn), NULL) + +/* The following member value is a pointer to a function that provides + information about the speculation capabilities of the target. + The parameter is a pointer to spec_info variable. */ +DEFHOOK +(set_sched_flags, + "", + void, (struct spec_info_def *spec_info), NULL) + +DEFHOOK_UNDOC +(get_insn_spec_ds, + "Return speculation types of instruction @var{insn}.", + int, (rtx insn), NULL) + +DEFHOOK_UNDOC +(get_insn_checked_ds, + "Return speculation types that are checked for instruction @var{insn}", + int, (rtx insn), NULL) + +DEFHOOK_UNDOC +(skip_rtx_p, + "Return bool if rtx scanning should just skip current layer and\ + advance to the inner rtxes.", + bool, (const_rtx x), NULL) + +/* The following member value is a pointer to a function that provides + information about the target resource-based lower bound which is + used by the swing modulo scheduler. The parameter is a pointer + to ddg variable. */ +DEFHOOK +(sms_res_mii, + "", + int, (struct ddg *g), NULL) + +/* The following member value is a function that initializes dispatch + schedling and adds instructions to dispatch window according to its + parameters. */ +DEFHOOK +(dispatch_do, +"", +void, (rtx insn, int x), +hook_void_rtx_int) + +/* The following member value is a a function that returns true is + dispatch schedling is supported in hardware and condition passed + as the second parameter is true. */ +DEFHOOK +(dispatch, +"", +bool, (rtx insn, int x), +hook_bool_rtx_int_false) + +HOOK_VECTOR_END (sched) + +/* Functions relating to vectorization. */ +#undef HOOK_PREFIX +#define HOOK_PREFIX "TARGET_VECTORIZE_" +HOOK_VECTOR (TARGET_VECTORIZE, vectorize) + +/* The following member value is a pointer to a function called + by the vectorizer, and return the decl of the target builtin + function. */ +DEFHOOK +(builtin_mask_for_load, + "", + tree, (void), NULL) + +/* Returns a code for builtin that realizes vectorized version of + function, or NULL_TREE if not available. */ +DEFHOOK +(builtin_vectorized_function, + "", + tree, (tree fndecl, tree vec_type_out, tree vec_type_in), + default_builtin_vectorized_function) + +/* Returns a function declaration for a builtin that realizes the + vector conversion, or NULL_TREE if not available. */ +DEFHOOK +(builtin_conversion, + "", + tree, (unsigned code, tree dest_type, tree src_type), + default_builtin_vectorized_conversion) + +/* Target builtin that implements vector widening multiplication. + builtin_mul_widen_eve computes the element-by-element products + for the even elements, and builtin_mul_widen_odd computes the + element-by-element products for the odd elements. */ +DEFHOOK +(builtin_mul_widen_even, + "", + tree, (tree x), NULL) + +DEFHOOK +(builtin_mul_widen_odd, + "", + tree, (tree x), NULL) + +/* Cost of different vector/scalar statements in vectorization cost + model. In case of misaligned vector loads and stores the cost depends + on the data type and misalignment value. */ +DEFHOOK +(builtin_vectorization_cost, + "", + int, (enum vect_cost_for_stmt type_of_cost, tree vectype, int misalign), + default_builtin_vectorization_cost) + +/* Return true if vector alignment is reachable (by peeling N + iterations) for the given type. */ +DEFHOOK +(vector_alignment_reachable, + "", + bool, (const_tree type, bool is_packed), + default_builtin_vector_alignment_reachable) + +/* Target builtin that implements vector permute. */ +DEFHOOK +(builtin_vec_perm, + "", + tree, (tree type, tree *mask_element_type), NULL) + +/* Return true if a vector created for builtin_vec_perm is valid. */ +DEFHOOK +(builtin_vec_perm_ok, + "", + bool, (tree vec_type, tree mask), + hook_bool_tree_tree_true) + +/* Return true if the target supports misaligned store/load of a + specific factor denoted in the third parameter. The last parameter + is true if the access is defined in a packed struct. */ +DEFHOOK +(support_vector_misalignment, + "", + bool, + (enum machine_mode mode, const_tree type, int misalignment, bool is_packed), + default_builtin_support_vector_misalignment) + +/* Returns the preferred mode for SIMD operations for the specified + scalar mode. */ +DEFHOOK +(preferred_simd_mode, + "", + enum machine_mode, + (enum machine_mode mode), + default_preferred_simd_mode) + +/* Returns a mask of vector sizes to iterate over when auto-vectorizing + after processing the preferred one derived from preferred_simd_mode. */ +DEFHOOK +(autovectorize_vector_sizes, + "", + unsigned int, + (void), + default_autovectorize_vector_sizes) + +HOOK_VECTOR_END (vectorize) + +#undef HOOK_PREFIX +#define HOOK_PREFIX "TARGET_" + +/* The initial value of target_flags. */ +DEFHOOKPOD +(default_target_flags, + "", + int, 0) + +/* Allow target specific overriding of option settings after options have + been changed by an attribute or pragma or when it is reset at the + end of the code affected by an attribute or pragma. */ +DEFHOOK +(override_options_after_change, + "", + void, (void), + hook_void_void) + +/* Handle target switch CODE (an OPT_* value). ARG is the argument + passed to the switch; it is NULL if no argument was. VALUE is the + value of ARG if CODE specifies a UInteger option, otherwise it is + 1 if the positive form of the switch was used and 0 if the negative + form was. Return true if the switch was valid. */ +DEFHOOK +(handle_option, + "", + bool, (size_t code, const char *arg, int value), + hook_bool_size_t_constcharptr_int_true) + +/* Display extra, target specific information in response to a + --target-help switch. */ +DEFHOOK +(help, + "", + void, (void), NULL) + +DEFHOOK_UNDOC +(eh_return_filter_mode, + "Return machine mode for filter value.", + enum machine_mode, (void), + default_eh_return_filter_mode) + +/* Return machine mode for libgcc expanded cmp instructions. */ +DEFHOOK +(libgcc_cmp_return_mode, + "", + enum machine_mode, (void), + default_libgcc_cmp_return_mode) + +/* Return machine mode for libgcc expanded shift instructions. */ +DEFHOOK +(libgcc_shift_count_mode, + "", + enum machine_mode, (void), + default_libgcc_shift_count_mode) + +/* Return machine mode to be used for _Unwind_Word type. */ +DEFHOOK +(unwind_word_mode, + "", + enum machine_mode, (void), + default_unwind_word_mode) + +/* Given two decls, merge their attributes and return the result. */ +DEFHOOK +(merge_decl_attributes, + "", + tree, (tree olddecl, tree newdecl), + merge_decl_attributes) + +/* Given two types, merge their attributes and return the result. */ +DEFHOOK +(merge_type_attributes, + "", + tree, (tree type1, tree type2), + merge_type_attributes) + +/* Table of machine attributes and functions to handle them. + Ignored if NULL. */ +DEFHOOKPOD +(attribute_table, + "", + const struct attribute_spec *, NULL) + +/* Return true iff attribute NAME expects a plain identifier as its first + argument. */ +DEFHOOK +(attribute_takes_identifier_p, + "", + bool, (const_tree name), + hook_bool_const_tree_false) + +/* Return zero if the attributes on TYPE1 and TYPE2 are incompatible, + one if they are compatible and two if they are nearly compatible + (which causes a warning to be generated). */ +DEFHOOK +(comp_type_attributes, + "", + int, (const_tree type1, const_tree type2), + hook_int_const_tree_const_tree_1) + +/* Assign default attributes to the newly defined TYPE. */ +DEFHOOK +(set_default_type_attributes, + "", + void, (tree type), + hook_void_tree) + +/* Insert attributes on the newly created DECL. */ +DEFHOOK +(insert_attributes, + "", + void, (tree node, tree *attr_ptr), + hook_void_tree_treeptr) + +/* Return true if FNDECL (which has at least one machine attribute) + can be inlined despite its machine attributes, false otherwise. */ +DEFHOOK +(function_attribute_inlinable_p, + "", + bool, (const_tree fndecl), + hook_bool_const_tree_false) + +/* Return true if bitfields in RECORD_TYPE should follow the + Microsoft Visual C++ bitfield layout rules. */ +DEFHOOK +(ms_bitfield_layout_p, + "", + bool, (const_tree record_type), + hook_bool_const_tree_false) + +/* For now this is only an interface to WORDS_BIG_ENDIAN for + target-independent code like the front ends, need performance testing + before switching completely to the target hook. */ +DEFHOOK_UNDOC +(words_big_endian, + "", + bool, (void), + targhook_words_big_endian) + +/* Likewise for FLOAT_WORDS_BIG_ENDIAN. */ +DEFHOOK_UNDOC +(float_words_big_endian, + "", + bool, (void), + targhook_float_words_big_endian) + +/* True if the target supports decimal floating point. */ +DEFHOOK +(decimal_float_supported_p, + "", + bool, (void), + default_decimal_float_supported_p) + +/* True if the target supports fixed-point. */ +DEFHOOK +(fixed_point_supported_p, + "", + bool, (void), + default_fixed_point_supported_p) + +/* Return true if anonymous bitfields affect structure alignment. */ +DEFHOOK +(align_anon_bitfield, + "", + bool, (void), + hook_bool_void_false) + +/* Return true if volatile bitfields should use the narrowest type possible. + Return false if they should use the container type. */ +DEFHOOK +(narrow_volatile_bitfield, + "", + bool, (void), + hook_bool_void_false) + +/* Set up target-specific built-in functions. */ +DEFHOOK +(init_builtins, + "", + void, (void), + hook_void_void) + +/* Initialize (if INITIALIZE_P is true) and return the target-specific + built-in function decl for CODE. + Return NULL if that is not possible. Return error_mark_node if CODE + is outside of the range of valid target builtin function codes. */ +DEFHOOK +(builtin_decl, + "", + tree, (unsigned code, bool initialize_p), NULL) + +/* Expand a target-specific builtin. */ +DEFHOOK +(expand_builtin, + "", + rtx, + (tree exp, rtx target, rtx subtarget, enum machine_mode mode, int ignore), + default_expand_builtin) + +/* Select a replacement for a target-specific builtin. This is done + *before* regular type checking, and so allows the target to + implement a crude form of function overloading. The result is a + complete expression that implements the operation. PARAMS really + has type VEC(tree,gc)*, but we don't want to include tree.h here. */ +DEFHOOK +(resolve_overloaded_builtin, + "", + tree, (unsigned int /*location_t*/ loc, tree fndecl, void *arglist), NULL) + +/* Fold a target-specific builtin. */ +DEFHOOK +(fold_builtin, + "", + tree, (tree fndecl, int n_args, tree *argp, bool ignore), + hook_tree_tree_int_treep_bool_null) + +/* Returns true if unaligned vector loads/stores are slow. */ +DEFHOOK +(slow_unaligned_vector_memop, + "", + bool, (void), NULL) + +/* Target hook to check if this function should be versioned. */ +DEFHOOK +(mversion_function, + "", + int, (tree fndecl, tree *optimization_node_chain, tree *cond_func_decl), NULL) + +/* Returns a code for a target-specific builtin that implements + reciprocal of the function, or NULL_TREE if not available. */ +DEFHOOK +(builtin_reciprocal, + "", + tree, (unsigned fn, bool md_fn, bool sqrt), + default_builtin_reciprocal) + +/* For a vendor-specific TYPE, return a pointer to a statically-allocated + string containing the C++ mangling for TYPE. In all other cases, return + NULL. */ +DEFHOOK +(mangle_type, + "", + const char *, (const_tree type), + hook_constcharptr_const_tree_null) + +/* Make any adjustments to libfunc names needed for this target. */ +DEFHOOK +(init_libfuncs, + "", + void, (void), + hook_void_void) + +/* Given a decl, a section name, and whether the decl initializer + has relocs, choose attributes for the section. */ +/* ??? Should be merged with SELECT_SECTION and UNIQUE_SECTION. */ +DEFHOOK +(section_type_flags, + "", + unsigned int, (tree decl, const char *name, int reloc), + default_section_type_flags) + +/* True if new jumps cannot be created, to replace existing ones or + not, at the current point in the compilation. */ +DEFHOOK +(cannot_modify_jumps_p, + "", + bool, (void), + hook_bool_void_false) + +/* Return a register class for which branch target register + optimizations should be applied. */ +DEFHOOK +(branch_target_register_class, + "", + reg_class_t, (void), + default_branch_target_register_class) + +/* Return true if branch target register optimizations should include + callee-saved registers that are not already live during the current + function. AFTER_PE_GEN is true if prologues and epilogues have + already been generated. */ +DEFHOOK +(branch_target_register_callee_saved, + "", + bool, (bool after_prologue_epilogue_gen), + hook_bool_bool_false) + +/* Return true if the target supports conditional execution. */ +DEFHOOK +(have_conditional_execution, + "", + bool, (void), + default_have_conditional_execution) + +/* Return a new value for loop unroll size. */ +DEFHOOK +(loop_unroll_adjust, + "", + unsigned, (unsigned nunroll, struct loop *loop), + NULL) + +/* True if the constant X cannot be placed in the constant pool. */ +DEFHOOK +(cannot_force_const_mem, + "", + bool, (rtx x), + hook_bool_rtx_false) + +DEFHOOK_UNDOC +(cannot_copy_insn_p, + "True if the insn @var{x} cannot be duplicated.", + bool, (rtx), NULL) + +/* True if X is considered to be commutative. */ +DEFHOOK +(commutative_p, + "", + bool, (const_rtx x, int outer_code), + hook_bool_const_rtx_commutative_p) + +/* True if ADDR is an address-expression whose effect depends + on the mode of the memory reference it is used in. */ +DEFHOOK +(mode_dependent_address_p, + "", + bool, (const_rtx addr), + default_mode_dependent_address_p) + +/* Given an invalid address X for a given machine mode, try machine-specific + ways to make it legitimate. Return X or an invalid address on failure. */ +DEFHOOK +(legitimize_address, + "", + rtx, (rtx x, rtx oldx, enum machine_mode mode), + default_legitimize_address) + +/* Given an address RTX, undo the effects of LEGITIMIZE_ADDRESS. */ +DEFHOOK +(delegitimize_address, + "", + rtx, (rtx x), + delegitimize_mem_from_attrs) + +/* Given an address RTX, say whether it is valid. */ +DEFHOOK +(legitimate_address_p, + "", + bool, (enum machine_mode mode, rtx x, bool strict), + default_legitimate_address_p) + +/* True if the given constant can be put into an object_block. */ +DEFHOOK +(use_blocks_for_constant_p, + "", + bool, (enum machine_mode mode, const_rtx x), + hook_bool_mode_const_rtx_false) + +/* The minimum and maximum byte offsets for anchored addresses. */ +DEFHOOKPOD +(min_anchor_offset, + "", + HOST_WIDE_INT, 0) + +DEFHOOKPOD +(max_anchor_offset, + "", + HOST_WIDE_INT, 0) + +/* True if section anchors can be used to access the given symbol. */ +DEFHOOK +(use_anchors_for_symbol_p, + "", + bool, (const_rtx x), + default_use_anchors_for_symbol_p) + +/* True if it is OK to do sibling call optimization for the specified + call expression EXP. DECL will be the called function, or NULL if + this is an indirect call. */ +DEFHOOK +(function_ok_for_sibcall, + "", + bool, (tree decl, tree exp), + hook_bool_tree_tree_false) + +/* Establish appropriate back-end context for processing the function + FNDECL. The argument might be NULL to indicate processing at top + level, outside of any function scope. */ +DEFHOOK +(set_current_function, + "", + void, (tree decl), hook_void_tree) + +/* True if EXP should be placed in a "small data" section. */ +DEFHOOK +(in_small_data_p, + "", + bool, (const_tree exp), + hook_bool_const_tree_false) + +/* True if EXP names an object for which name resolution must resolve + to the current executable or shared library. */ +DEFHOOK +(binds_local_p, + "", + bool, (const_tree exp), + default_binds_local_p) + +/* Check if profiling code is before or after prologue. */ +DEFHOOK +(profile_before_prologue, + "It returns true if target wants profile code emitted before prologue.\n\n\ +The default version of this hook use the target macro\n\ +@code{PROFILE_BEFORE_PROLOGUE}.", + bool, (void), + default_profile_before_prologue) + +/* Modify and return the identifier of a DECL's external name, + originally identified by ID, as required by the target, + (eg, append @nn to windows32 stdcall function names). + The default is to return ID without modification. */ +DEFHOOK +(mangle_decl_assembler_name, + "", + tree, (tree decl, tree id), + default_mangle_decl_assembler_name) + +/* Do something target-specific to record properties of the DECL into + the associated SYMBOL_REF. */ +DEFHOOK +(encode_section_info, + "", + void, (tree decl, rtx rtl, int new_decl_p), + default_encode_section_info) + +/* Undo the effects of encode_section_info on the symbol string. */ +DEFHOOK +(strip_name_encoding, + "", + const char *, (const char *name), + default_strip_name_encoding) + +/* If shift optabs for MODE are known to always truncate the shift count, + return the mask that they apply. Return 0 otherwise. */ +DEFHOOK +(shift_truncation_mask, + "", + unsigned HOST_WIDE_INT, (enum machine_mode mode), + default_shift_truncation_mask) + +/* Return the number of divisions in the given MODE that should be present, + so that it is profitable to turn the division into a multiplication by + the reciprocal. */ +DEFHOOK +(min_divisions_for_recip_mul, + "", + unsigned int, (enum machine_mode mode), + default_min_divisions_for_recip_mul) + +/* If the representation of integral MODE is such that values are + always sign-extended to a wider mode MODE_REP then return + SIGN_EXTEND. Return UNKNOWN otherwise. */ +/* Note that the return type ought to be RTX_CODE, but that's not + necessarily defined at this point. */ +DEFHOOK +(mode_rep_extended, + "", + int, (enum machine_mode mode, enum machine_mode rep_mode), + default_mode_rep_extended) + +/* True if MODE is valid for a pointer in __attribute__((mode("MODE"))). */ +DEFHOOK +(valid_pointer_mode, + "", + bool, (enum machine_mode mode), + default_valid_pointer_mode) + +/* Disambiguate with errno. */ +DEFHOOK +(ref_may_alias_errno, + "Define this to return nonzero if the memory reference @var{ref}\ + may alias with the system C library errno location. The default\ + version of this hook assumes the system C library errno location\ + is either a declaration of type int or accessed by dereferencing\ + a pointer to int.", + bool, (struct ao_ref_s *ref), + default_ref_may_alias_errno) + +/* Support for named address spaces. */ +#undef HOOK_PREFIX +#define HOOK_PREFIX "TARGET_ADDR_SPACE_" +HOOK_VECTOR (TARGET_ADDR_SPACE_HOOKS, addr_space) + +/* MODE to use for a pointer into another address space. */ +DEFHOOK +(pointer_mode, + "", + enum machine_mode, (addr_space_t address_space), + default_addr_space_pointer_mode) + +/* MODE to use for an address in another address space. */ +DEFHOOK +(address_mode, + "", + enum machine_mode, (addr_space_t address_space), + default_addr_space_address_mode) + +/* True if MODE is valid for a pointer in __attribute__((mode("MODE"))) + in another address space. */ +DEFHOOK +(valid_pointer_mode, + "", + bool, (enum machine_mode mode, addr_space_t as), + default_addr_space_valid_pointer_mode) + +/* True if an address is a valid memory address to a given named address + space for a given mode. */ +DEFHOOK +(legitimate_address_p, + "", + bool, (enum machine_mode mode, rtx exp, bool strict, addr_space_t as), + default_addr_space_legitimate_address_p) + +/* Return an updated address to convert an invalid pointer to a named + address space to a valid one. If NULL_RTX is returned use machine + independent methods to make the address valid. */ +DEFHOOK +(legitimize_address, + "", + rtx, (rtx x, rtx oldx, enum machine_mode mode, addr_space_t as), + default_addr_space_legitimize_address) + +/* True if one named address space is a subset of another named address. */ +DEFHOOK +(subset_p, + "", + bool, (addr_space_t superset, addr_space_t subset), + default_addr_space_subset_p) + +/* Function to convert an rtl expression from one address space to another. */ +DEFHOOK +(convert, + "", + rtx, (rtx op, tree from_type, tree to_type), + default_addr_space_convert) + +HOOK_VECTOR_END (addr_space) + +#undef HOOK_PREFIX +#define HOOK_PREFIX "TARGET_" + +/* True if MODE is valid for the target. By "valid", we mean able to + be manipulated in non-trivial ways. In particular, this means all + the arithmetic is supported. */ +DEFHOOK +(scalar_mode_supported_p, + "", + bool, (enum machine_mode mode), + default_scalar_mode_supported_p) + +/* Similarly for vector modes. "Supported" here is less strict. At + least some operations are supported; need to check optabs or builtins + for further details. */ +DEFHOOK +(vector_mode_supported_p, + "", + bool, (enum machine_mode mode), + hook_bool_mode_false) + +/* Compute cost of moving data from a register of class FROM to one of + TO, using MODE. */ +DEFHOOK +(register_move_cost, + "", + int, (enum machine_mode mode, reg_class_t from, reg_class_t to), + default_register_move_cost) + +/* Compute cost of moving registers to/from memory. */ +/* ??? Documenting the argument types for this hook requires a GFDL + license grant. Also, the documentation uses a different name for RCLASS. */ +DEFHOOK +(memory_move_cost, + "", + int, (enum machine_mode mode, reg_class_t rclass, bool in), + default_memory_move_cost) + +/* True for MODE if the target expects that registers in this mode will + be allocated to registers in a small register class. The compiler is + allowed to use registers explicitly used in the rtl as spill registers + but it should prevent extending the lifetime of these registers. */ +DEFHOOK +(small_register_classes_for_mode_p, + "", + bool, (enum machine_mode mode), + hook_bool_mode_false) + +/* Register number for a flags register. Only needs to be defined if the + target is constrainted to use post-reload comparison elimination. */ +DEFHOOKPOD +(flags_regnum, + "If the target has a dedicated flags register, and it needs to use the\ + post-reload comparison elimination pass, then this value should be set\ + appropriately.", + unsigned int, INVALID_REGNUM) + +/* Compute a (partial) cost for rtx X. Return true if the complete + cost has been computed, and false if subexpressions should be + scanned. In either case, *TOTAL contains the cost result. */ +/* Note that CODE and OUTER_CODE ought to be RTX_CODE, but that's + not necessarily defined at this point. */ +DEFHOOK +(rtx_costs, + "", + bool, (rtx x, int code, int outer_code, int *total, bool speed), + hook_bool_rtx_int_int_intp_bool_false) + +/* Compute the cost of X, used as an address. Never called with + invalid addresses. */ +DEFHOOK +(address_cost, + "", + int, (rtx address, bool speed), + default_address_cost) + +/* Return where to allocate pseudo for a given hard register initial value. */ +DEFHOOK +(allocate_initial_value, + "", + rtx, (rtx hard_reg), NULL) + +/* Return nonzero if evaluating UNSPEC[_VOLATILE] X might cause a trap. + FLAGS has the same meaning as in rtlanal.c: may_trap_p_1. */ +DEFHOOK +(unspec_may_trap_p, + "", + int, (const_rtx x, unsigned flags), + default_unspec_may_trap_p) + +/* Given a register, this hook should return a parallel of registers + to represent where to find the register pieces. Define this hook + if the register and its mode are represented in Dwarf in + non-contiguous locations, or if the register should be + represented in more than one register in Dwarf. Otherwise, this + hook should return NULL_RTX. */ +DEFHOOK +(dwarf_register_span, + "", + rtx, (rtx reg), + hook_rtx_rtx_null) + +/* If expand_builtin_init_dwarf_reg_sizes needs to fill in table + entries not corresponding directly to registers below + FIRST_PSEUDO_REGISTER, this hook should generate the necessary + code, given the address of the table. */ +DEFHOOK +(init_dwarf_reg_sizes_extra, + "", + void, (tree address), + hook_void_tree) + +/* Fetch the fixed register(s) which hold condition codes, for + targets where it makes sense to look for duplicate assignments to + the condition codes. This should return true if there is such a + register, false otherwise. The arguments should be set to the + fixed register numbers. Up to two condition code registers are + supported. If there is only one for this target, the int pointed + at by the second argument should be set to -1. */ +DEFHOOK +(fixed_condition_code_regs, + "", + bool, (unsigned int *p1, unsigned int *p2), + hook_bool_uintp_uintp_false) + +/* If two condition code modes are compatible, return a condition + code mode which is compatible with both, such that a comparison + done in the returned mode will work for both of the original + modes. If the condition code modes are not compatible, return + VOIDmode. */ +DEFHOOK +(cc_modes_compatible, + "", + enum machine_mode, (enum machine_mode m1, enum machine_mode m2), + default_cc_modes_compatible) + +/* Do machine-dependent code transformations. Called just before + delayed-branch scheduling. */ +DEFHOOK +(machine_dependent_reorg, + "", + void, (void), NULL) + +/* Create the __builtin_va_list type. */ +DEFHOOK +(build_builtin_va_list, + "", + tree, (void), + std_build_builtin_va_list) + +/* Enumerate the va list variants. */ +DEFHOOK +(enum_va_list_p, + "", + int, (int idx, const char **pname, tree *ptree), + NULL) + +/* Get the cfun/fndecl calling abi __builtin_va_list type. */ +DEFHOOK +(fn_abi_va_list, + "", + tree, (tree fndecl), + std_fn_abi_va_list) + +/* Get the __builtin_va_list type dependent on input type. */ +DEFHOOK +(canonical_va_list_type, + "", + tree, (tree type), + std_canonical_va_list_type) + +/* ??? Documenting this hook requires a GFDL license grant. */ +DEFHOOK_UNDOC +(expand_builtin_va_start, +"Expand the @code{__builtin_va_start} builtin.", + void, (tree valist, rtx nextarg), NULL) + +/* Gimplifies a VA_ARG_EXPR. */ +DEFHOOK +(gimplify_va_arg_expr, + "", + tree, (tree valist, tree type, gimple_seq *pre_p, gimple_seq *post_p), + std_gimplify_va_arg_expr) + +/* Validity-checking routines for PCH files, target-specific. + get_pch_validity returns a pointer to the data to be stored, + and stores the size in its argument. pch_valid_p gets the same + information back and returns NULL if the PCH is valid, + or an error message if not. */ +DEFHOOK +(get_pch_validity, + "", + void *, (size_t *sz), + default_get_pch_validity) + +DEFHOOK +(pch_valid_p, + "", + const char *, (const void *data, size_t sz), + default_pch_valid_p) + +/* If nonnull, this function checks whether a PCH file with the + given set of target flags can be used. It returns NULL if so, + otherwise it returns an error message. */ +DEFHOOK +(check_pch_target_flags, + "", + const char *, (int pch_flags), NULL) + +/* True if the compiler should give an enum type only as many + bytes as it takes to represent the range of possible values of + that type. */ +DEFHOOK +(default_short_enums, + "", + bool, (void), + hook_bool_void_false) + +/* This target hook returns an rtx that is used to store the address + of the current frame into the built-in setjmp buffer. */ +DEFHOOK +(builtin_setjmp_frame_value, + "", + rtx, (void), + default_builtin_setjmp_frame_value) + +/* This target hook should add STRING_CST trees for any hard regs + the port wishes to automatically clobber for an asm. */ +DEFHOOK +(md_asm_clobbers, + "", + tree, (tree outputs, tree inputs, tree clobbers), + hook_tree_tree_tree_tree_3rd_identity) + +/* This target hook allows the backend to specify a calling convention + in the debug information. This function actually returns an + enum dwarf_calling_convention, but because of forward declarations + and not wanting to include dwarf2.h everywhere target.h is included + the function is being declared as an int. */ +DEFHOOK +(dwarf_calling_convention, + "", + int, (const_tree function), + hook_int_const_tree_0) + +/* This target hook allows the backend to emit frame-related insns that + contain UNSPECs or UNSPEC_VOLATILEs. The call frame debugging info + engine will invoke it on insns of the form + (set (reg) (unspec [...] UNSPEC_INDEX)) + and + (set (reg) (unspec_volatile [...] UNSPECV_INDEX)) + to let the backend emit the call frame instructions. */ +DEFHOOK +(dwarf_handle_frame_unspec, + "", + void, (const char *label, rtx pattern, int index), NULL) + +/* ??? Documenting this hook requires a GFDL license grant. */ +DEFHOOK_UNDOC +(stdarg_optimize_hook, +"Perform architecture specific checking of statements gimplified\ + from @code{VA_ARG_EXPR}. @var{stmt} is the statement. Returns true if\ + the statement doesn't need to be checked for @code{va_list} references.", + bool, (struct stdarg_info *ai, const_gimple stmt), NULL) + +/* This target hook allows the operating system to override the DECL + that represents the external variable that contains the stack + protection guard variable. The type of this DECL is ptr_type_node. */ +DEFHOOK +(stack_protect_guard, + "", + tree, (void), + default_stack_protect_guard) + +/* This target hook allows the operating system to override the CALL_EXPR + that is invoked when a check vs the guard variable fails. */ +DEFHOOK +(stack_protect_fail, + "", + tree, (void), + default_external_stack_protect_fail) + +DEFHOOK +(supports_split_stack, + "Whether this target supports splitting the stack when the options\ + described in @var{opts} have been passed. This is called\ + after options have been parsed, so the target may reject splitting\ + the stack in some configurations. The default version of this hook\ + returns false. If @var{report} is true, this function may issue a warning\ + or error; if @var{report} is false, it must simply return a value", + bool, (bool report, struct gcc_options *opts), + hook_bool_bool_gcc_optionsp_false) + +/* Returns NULL if target supports the insn within a doloop block, + otherwise it returns an error message. */ +DEFHOOK +(invalid_within_doloop, + "", + const char *, (const_rtx insn), + default_invalid_within_doloop) + +DEFHOOK +(valid_dllimport_attribute_p, +"@var{decl} is a variable or function with @code{__attribute__((dllimport))}\ + specified. Use this hook if the target needs to add extra validation\ + checks to @code{handle_dll_attribute}.", + bool, (const_tree decl), + hook_bool_const_tree_true) + +/* If non-zero, align constant anchors in CSE to a multiple of this + value. */ +DEFHOOKPOD +(const_anchor, + "", + unsigned HOST_WIDE_INT, 0) + +/* Functions relating to calls - argument passing, returns, etc. */ +/* Members of struct call have no special macro prefix. */ +HOOK_VECTOR (TARGET_CALLS, calls) + +DEFHOOK +(promote_function_mode, + "", + enum machine_mode, (const_tree type, enum machine_mode mode, int *punsignedp, + const_tree funtype, int for_return), + default_promote_function_mode) + +DEFHOOK +(promote_prototypes, + "", + bool, (const_tree fntype), + hook_bool_const_tree_false) + +DEFHOOK +(struct_value_rtx, + "", + rtx, (tree fndecl, int incoming), + hook_rtx_tree_int_null) +DEFHOOK +(return_in_memory, + "", + bool, (const_tree type, const_tree fntype), + default_return_in_memory) + +DEFHOOK +(return_in_msb, + "", + bool, (const_tree type), + hook_bool_const_tree_false) + +/* Return true if a parameter must be passed by reference. TYPE may + be null if this is a libcall. CA may be null if this query is + from __builtin_va_arg. */ +DEFHOOK +(pass_by_reference, + "", + bool, + (CUMULATIVE_ARGS *cum, enum machine_mode mode, const_tree type, bool named), + hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false) + +DEFHOOK +(expand_builtin_saveregs, + "", + rtx, (void), + default_expand_builtin_saveregs) + +/* Returns pretend_argument_size. */ +DEFHOOK +(setup_incoming_varargs, + "", + void, (CUMULATIVE_ARGS *args_so_far, enum machine_mode mode, tree type, + int *pretend_args_size, int second_time), + default_setup_incoming_varargs) + +DEFHOOK +(strict_argument_naming, + "", + bool, (CUMULATIVE_ARGS *ca), + hook_bool_CUMULATIVE_ARGS_false) + +/* Returns true if we should use + targetm.calls.setup_incoming_varargs() and/or + targetm.calls.strict_argument_naming(). */ +DEFHOOK +(pretend_outgoing_varargs_named, + "", + bool, (CUMULATIVE_ARGS *ca), + default_pretend_outgoing_varargs_named) + +/* Given a complex type T, return true if a parameter of type T + should be passed as two scalars. */ +DEFHOOK +(split_complex_arg, + "", + bool, (const_tree type), NULL) + +/* Return true if type T, mode MODE, may not be passed in registers, + but must be passed on the stack. */ +/* ??? This predicate should be applied strictly after pass-by-reference. + Need audit to verify that this is the case. */ +DEFHOOK +(must_pass_in_stack, + "", + bool, (enum machine_mode mode, const_tree type), + must_pass_in_stack_var_size_or_pad) + +/* Return true if type TYPE, mode MODE, which is passed by reference, + should have the object copy generated by the callee rather than + the caller. It is never called for TYPE requiring constructors. */ +DEFHOOK +(callee_copies, + "", + bool, + (CUMULATIVE_ARGS *cum, enum machine_mode mode, const_tree type, bool named), + hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false) + +/* Return zero for arguments passed entirely on the stack or entirely + in registers. If passed in both, return the number of bytes passed + in registers; the balance is therefore passed on the stack. */ +DEFHOOK +(arg_partial_bytes, + "", + int, (CUMULATIVE_ARGS *cum, enum machine_mode mode, tree type, bool named), + hook_int_CUMULATIVE_ARGS_mode_tree_bool_0) + +/* Update the state in CA to advance past an argument in the + argument list. The values MODE, TYPE, and NAMED describe that + argument. */ +/* ??? tm.texi still only describes the old macro. */ +DEFHOOK_UNDOC +(function_arg_advance, + "", + void, + (CUMULATIVE_ARGS *ca, enum machine_mode mode, const_tree type, bool named), + default_function_arg_advance) + +/* Return zero if the argument described by the state of CA should + be placed on a stack, or a hard register in which to store the + argument. The values MODE, TYPE, and NAMED describe that + argument. */ +/* ??? tm.texi still only describes the old macro. */ +DEFHOOK_UNDOC +(function_arg, + "", + rtx, (CUMULATIVE_ARGS *ca, enum machine_mode mode, const_tree type, + bool named), + default_function_arg) + +/* Likewise, but for machines with register windows. Return the + location where the argument will appear to the callee. */ +/* ??? tm.texi still only describes the old macro. */ +DEFHOOK_UNDOC +(function_incoming_arg, + "", + rtx, (CUMULATIVE_ARGS *ca, enum machine_mode mode, const_tree type, + bool named), + default_function_incoming_arg) + +DEFHOOK +(function_arg_boundary, + "", + unsigned int, (enum machine_mode mode, const_tree type), + default_function_arg_boundary) + +/* Return the diagnostic message string if function without a prototype + is not allowed for this 'val' argument; NULL otherwise. */ +DEFHOOK +(invalid_arg_for_unprototyped_fn, + "", + const char *, (const_tree typelist, const_tree funcdecl, const_tree val), + hook_invalid_arg_for_unprototyped_fn) + +/* Return an rtx for the return value location of the function + specified by FN_DECL_OR_TYPE with a return type of RET_TYPE. */ +DEFHOOK +(function_value, + "", + rtx, (const_tree ret_type, const_tree fn_decl_or_type, bool outgoing), + default_function_value) + +/* Return the rtx for the result of a libcall of mode MODE, + calling the function FN_NAME. */ +DEFHOOK +(libcall_value, + "", + rtx, (enum machine_mode mode, const_rtx fun), + default_libcall_value) + +/* Return true if REGNO is a possible register number for + a function value as seen by the caller. */ +DEFHOOK +(function_value_regno_p, + "", + bool, (const unsigned int regno), + default_function_value_regno_p) + +/* ??? Documenting this hook requires a GFDL license grant. */ +DEFHOOK_UNDOC +(internal_arg_pointer, +"Return an rtx for the argument pointer incoming to the\ + current function.", + rtx, (void), + default_internal_arg_pointer) + +/* Update the current function stack boundary if needed. */ +DEFHOOK +(update_stack_boundary, + "", + void, (void), NULL) + +/* Handle stack alignment and return an rtx for Dynamic Realign + Argument Pointer if necessary. */ +DEFHOOK +(get_drap_rtx, + "", + rtx, (void), NULL) + +/* Return true if all function parameters should be spilled to the + stack. */ +DEFHOOK +(allocate_stack_slots_for_args, + "", + bool, (void), + hook_bool_void_true) + +/* Return an rtx for the static chain for FNDECL. If INCOMING_P is true, + then it should be for the callee; otherwise for the caller. */ +DEFHOOK +(static_chain, + "", + rtx, (const_tree fndecl, bool incoming_p), + default_static_chain) + +/* Fill in the trampoline at MEM with a call to FNDECL and a + static chain value of CHAIN. */ +DEFHOOK +(trampoline_init, + "", + void, (rtx m_tramp, tree fndecl, rtx static_chain), + default_trampoline_init) + +/* Adjust the address of the trampoline in a target-specific way. */ +DEFHOOK +(trampoline_adjust_address, + "", + rtx, (rtx addr), NULL) + +/* Return the number of bytes of its own arguments that a function + pops on returning, or 0 if the function pops no arguments and the + caller must therefore pop them all after the function returns. */ +/* ??? tm.texi has no types for the parameters. */ +DEFHOOK +(return_pops_args, + "", + int, (tree fundecl, tree funtype, int size), + default_return_pops_args) + +/* Return a mode wide enough to copy any function value that might be + returned. */ +DEFHOOK +(get_raw_result_mode, + "This target hook returns the mode to be used when accessing raw return\ + registers in @code{__builtin_return}. Define this macro if the value\ + in @var{reg_raw_mode} is not correct.", + enum machine_mode, (int regno), + default_get_reg_raw_mode) + +/* Return a mode wide enough to copy any argument value that might be + passed. */ +DEFHOOK +(get_raw_arg_mode, + "This target hook returns the mode to be used when accessing raw argument\ + registers in @code{__builtin_apply_args}. Define this macro if the value\ + in @var{reg_raw_mode} is not correct.", + enum machine_mode, (int regno), + default_get_reg_raw_mode) + +HOOK_VECTOR_END (calls) + +/* Return the diagnostic message string if conversion from FROMTYPE + to TOTYPE is not allowed, NULL otherwise. */ +DEFHOOK +(invalid_conversion, + "", + const char *, (const_tree fromtype, const_tree totype), + hook_constcharptr_const_tree_const_tree_null) + +/* Return the diagnostic message string if the unary operation OP is + not permitted on TYPE, NULL otherwise. */ +DEFHOOK +(invalid_unary_op, + "", + const char *, (int op, const_tree type), + hook_constcharptr_int_const_tree_null) + +/* Return the diagnostic message string if the binary operation OP + is not permitted on TYPE1 and TYPE2, NULL otherwise. */ +DEFHOOK +(invalid_binary_op, + "", + const char *, (int op, const_tree type1, const_tree type2), + hook_constcharptr_int_const_tree_const_tree_null) + +/* Return the diagnostic message string if TYPE is not valid as a + function parameter type, NULL otherwise. */ +DEFHOOK +(invalid_parameter_type, + "", + const char *, (const_tree type), + hook_constcharptr_const_tree_null) + +/* Return the diagnostic message string if TYPE is not valid as a + function return type, NULL otherwise. */ +DEFHOOK +(invalid_return_type, + "", + const char *, (const_tree type), + hook_constcharptr_const_tree_null) + +/* If values of TYPE are promoted to some other type when used in + expressions (analogous to the integer promotions), return that type, + or NULL_TREE otherwise. */ +DEFHOOK +(promoted_type, + "", + tree, (const_tree type), + hook_tree_const_tree_null) + +/* Convert EXPR to TYPE, if target-specific types with special conversion + rules are involved. Return the converted expression, or NULL to apply + the standard conversion rules. */ +DEFHOOK +(convert_to_type, + "", + tree, (tree type, tree expr), + hook_tree_tree_tree_null) + +/* Return the array of IRA cover classes for the current target. */ +DEFHOOK +(ira_cover_classes, + "", + const reg_class_t *, (void), + default_ira_cover_classes) + +/* Return the class for a secondary reload, and fill in extra information. */ +DEFHOOK +(secondary_reload, + "", + reg_class_t, + (bool in_p, rtx x, reg_class_t reload_class, enum machine_mode reload_mode, + secondary_reload_info *sri), + default_secondary_reload) + +/* Given an rtx X being reloaded into a reg required to be in class CLASS, + return the class of reg to actually use. */ +DEFHOOK +(preferred_reload_class, + "", + reg_class_t, + (rtx x, reg_class_t rclass), + default_preferred_reload_class) + +/* Like TARGET_PREFERRED_RELOAD_CLASS, but for output reloads instead of + input reloads. */ +DEFHOOK +(preferred_output_reload_class, + "", + reg_class_t, + (rtx x, reg_class_t rclass), + default_preferred_output_reload_class) + +DEFHOOK +(class_likely_spilled_p, + "", + bool, (reg_class_t rclass), + default_class_likely_spilled_p) + +DEFHOOK +(preferred_rename_class, + "A target hook that places additional preference on the register\ + class to use when it is necessary to rename a register in class\ + @var{rclass} to another class, or perhaps @var{NO_REGS}, if no\ + preferred register class is found or hook @code{preferred_rename_class}\ + is not implemented.\ + Sometimes returning a more restrictive class makes better code. For\ + example, on ARM, thumb-2 instructions using @code{LO_REGS} may be\ + smaller than instructions using @code{GENERIC_REGS}. By returning\ + @code{LO_REGS} from @code{preferred_rename_class}, code size can\ + be reduced.", + reg_class_t, (reg_class_t rclass), + default_preferred_rename_class) + +/* This target hook allows the backend to perform additional + processing while initializing for variable expansion. */ +DEFHOOK +(expand_to_rtl_hook, + "", + void, (void), + hook_void_void) + +/* This target hook allows the backend to perform additional + instantiations on rtx that are not actually in insns yet, + but will be later. */ +DEFHOOK +(instantiate_decls, + "", + void, (void), + hook_void_void) + +/* Return true if is OK to use a hard register REGNO as scratch register + in peephole2. */ +DEFHOOK +(hard_regno_scratch_ok, + "", + bool, (unsigned int regno), + default_hard_regno_scratch_ok) + +/* Return the smallest number of different values for which it is best to + use a jump-table instead of a tree of conditional branches. */ +DEFHOOK +(case_values_threshold, + "", + unsigned int, (void), + default_case_values_threshold) + +/* Retutn true if a function must have and use a frame pointer. */ +DEFHOOK +(frame_pointer_required, + "", + bool, (void), + hook_bool_void_false) + +/* Returns true if the compiler is allowed to try to replace register number + from-reg with register number to-reg. */ +DEFHOOK +(can_eliminate, + "", + bool, (const int from_reg, const int to_reg), + hook_bool_const_int_const_int_true) + +/* Modify any or all of fixed_regs, call_used_regs, global_regs, + reg_names, and reg_class_contents to account of the vagaries of the + target. */ +DEFHOOK +(conditional_register_usage, + "", + void, (void), + hook_void_void) + +/* Functions specific to the C family of frontends. */ +#undef HOOK_PREFIX +#define HOOK_PREFIX "TARGET_C_" +HOOK_VECTOR (TARGET_C, c) + +/* ??? Documenting this hook requires a GFDL license grant. */ +DEFHOOK_UNDOC +(mode_for_suffix, +"Return machine mode for non-standard constant literal suffix @var{c},\ + or VOIDmode if non-standard suffixes are unsupported.", + enum machine_mode, (char c), + default_mode_for_suffix) + +HOOK_VECTOR_END (c) + +/* Functions specific to the C++ frontend. */ +#undef HOOK_PREFIX +#define HOOK_PREFIX "TARGET_CXX_" +HOOK_VECTOR (TARGET_CXX, cxx) + +/* Return the integer type used for guard variables. */ +DEFHOOK +(guard_type, + "", + tree, (void), + default_cxx_guard_type) + +/* Return true if only the low bit of the guard should be tested. */ +DEFHOOK +(guard_mask_bit, + "", + bool, (void), + hook_bool_void_false) + +/* Returns the size of the array cookie for an array of type. */ +DEFHOOK +(get_cookie_size, + "", + tree, (tree type), + default_cxx_get_cookie_size) + +/* Returns true if the element size should be stored in the array cookie. */ +DEFHOOK +(cookie_has_size, + "", + bool, (void), + hook_bool_void_false) + +/* Allows backends to perform additional processing when + deciding if a class should be exported or imported. */ +DEFHOOK +(import_export_class, + "", + int, (tree type, int import_export), NULL) + +/* Returns true if constructors and destructors return "this". */ +DEFHOOK +(cdtor_returns_this, + "", + bool, (void), + hook_bool_void_false) + +/* Returns true if the key method for a class can be an inline + function, so long as it is not declared inline in the class + itself. Returning true is the behavior required by the Itanium C++ ABI. */ +DEFHOOK +(key_method_may_be_inline, + "", + bool, (void), + hook_bool_void_true) + +DEFHOOK +(determine_class_data_visibility, +"@var{decl} is a virtual table, virtual table table, typeinfo object,\ + or other similar implicit class data object that will be emitted with\ + external linkage in this translation unit. No ELF visibility has been\ + explicitly specified. If the target needs to specify a visibility\ + other than that of the containing class, use this hook to set\ + @code{DECL_VISIBILITY} and @code{DECL_VISIBILITY_SPECIFIED}.", + void, (tree decl), + hook_void_tree) + +/* Returns true (the default) if virtual tables and other + similar implicit class data objects are always COMDAT if they + have external linkage. If this hook returns false, then + class data for classes whose virtual table will be emitted in + only one translation unit will not be COMDAT. */ +DEFHOOK +(class_data_always_comdat, + "", + bool, (void), + hook_bool_void_true) + +/* Returns true (the default) if the RTTI for the basic types, + which is always defined in the C++ runtime, should be COMDAT; + false if it should not be COMDAT. */ +DEFHOOK +(library_rtti_comdat, + "", + bool, (void), + hook_bool_void_true) + +/* Returns true if __aeabi_atexit should be used to register static + destructors. */ +DEFHOOK +(use_aeabi_atexit, + "", + bool, (void), + hook_bool_void_false) + +/* Returns true if target may use atexit in the same manner as + __cxa_atexit to register static destructors. */ +DEFHOOK +(use_atexit_for_cxa_atexit, + "", + bool, (void), + hook_bool_void_false) + +DEFHOOK +(adjust_class_at_definition, +"@var{type} is a C++ class (i.e., RECORD_TYPE or UNION_TYPE) that has just\ + been defined. Use this hook to make adjustments to the class (eg, tweak\ + visibility or perform any other required target modifications).", + void, (tree type), + hook_void_tree) + +HOOK_VECTOR_END (cxx) + +/* Functions and data for emulated TLS support. */ +#undef HOOK_PREFIX +#define HOOK_PREFIX "TARGET_EMUTLS_" +HOOK_VECTOR (TARGET_EMUTLS, emutls) + +/* Name of the address and common functions. */ +DEFHOOKPOD +(get_address, + "", + const char *, "__builtin___emutls_get_address") + +DEFHOOKPOD +(register_common, + "", + const char *, "__builtin___emutls_register_common") + +/* Prefixes for proxy variable and template. */ +DEFHOOKPOD +(var_section, + "", + const char *, NULL) + +DEFHOOKPOD +(tmpl_section, + "", + const char *, NULL) + +/* Prefixes for proxy variable and template. */ +DEFHOOKPOD +(var_prefix, + "", + const char *, NULL) + +DEFHOOKPOD +(tmpl_prefix, + "", + const char *, NULL) + +/* Function to generate field definitions of the proxy variable. */ +DEFHOOK +(var_fields, + "", + tree, (tree type, tree *name), + default_emutls_var_fields) + +/* Function to initialize a proxy variable. */ +DEFHOOK +(var_init, + "", + tree, (tree var, tree decl, tree tmpl_addr), + default_emutls_var_init) + +/* Whether we are allowed to alter the usual alignment of the + proxy variable. */ +DEFHOOKPOD +(var_align_fixed, + "", + bool, false) + +/* Whether we can emit debug information for TLS vars. */ +DEFHOOKPOD +(debug_form_tls_address, + "", + bool, false) + +HOOK_VECTOR_END (emutls) + +#undef HOOK_PREFIX +#define HOOK_PREFIX "TARGET_OPTION_" +HOOK_VECTOR (TARGET_OPTION_HOOKS, target_option_hooks) + +/* Function to validate the attribute((option(...))) strings or NULL. If + the option is validated, it is assumed that DECL_FUNCTION_SPECIFIC will + be filled in in the function decl node. */ +DEFHOOK +(valid_attribute_p, + "", + bool, (tree fndecl, tree name, tree args, int flags), + default_target_option_valid_attribute_p) + +/* Function to save any extra target state in the target options structure. */ +DEFHOOK +(save, + "", + void, (struct cl_target_option *ptr), NULL) + +/* Function to restore any extra target state from the target options + structure. */ +DEFHOOK +(restore, + "", + void, (struct cl_target_option *ptr), NULL) + +/* Function to print any extra target state from the target options + structure. */ +DEFHOOK +(print, + "", + void, (FILE *file, int indent, struct cl_target_option *ptr), NULL) + +/* Function to parse arguments to be validated for #pragma option, and to + change the state if the options are valid. If the first argument is + NULL, the second argument specifies the default options to use. Return + true if the options are valid, and set the current state. */ +/* ??? The documentation in tm.texi is incomplete. */ +DEFHOOK +(pragma_parse, + "", + bool, (tree args, tree pop_target), + default_target_option_pragma_parse) + +/* Do option overrides for the target. */ +DEFHOOK +(override, + "", + void, (void), + hook_void_void) + +/* Set default optimizations for the target. */ +DEFHOOKPOD +(optimization_table, + "", + const struct default_options *, empty_optimization_table) + +DEFHOOK +(default_params, +"Set target-dependent default values for @option{--param} settings, using\ + calls to @code{set_default_param_value}.", + void, (void), + hook_void_void) + +DEFHOOK +(init_struct, +"Set target-dependent initial values of fields in @var{opts}.", + void, (struct gcc_options *opts), + hook_void_gcc_optionsp) + +/* Function to determine if one function can inline another function. */ +#undef HOOK_PREFIX +#define HOOK_PREFIX "TARGET_" +DEFHOOK +(can_inline_p, + "", + bool, (tree caller, tree callee), + default_target_can_inline_p) + +HOOK_VECTOR_END (target_option) + +/* Functions used to simplify GOT access. */ +#undef HOOK_PREFIX +#define HOOK_PREFIX "TARGET_" +HOOK_VECTOR (TARGET_SIMPLIFY_GOT_ACCESS, simplify_got_access) + +/* Function to get the pic_reg which holds the base address of GOT. */ +DEFHOOK +(get_pic_reg, +"Return the pic_reg pseudo register which holds the base address of GOT.\ + It is only required by the simplify-got optimization.", + rtx, (void), + hook_rtx_void_null) + +/* Function to clear the pic_reg which is useless now. */ +DEFHOOK +(clear_pic_reg, +"After successful simplify-got optimization, the pic_reg is useless. So a\ + target can use this hook to clear pic_reg.", + void, (void), + NULL) + +/* Function to detect if the specified insn loads a global variable's + address from GOT. If so returns that symbol. */ +DEFHOOK +(loaded_global_var, +"This hook is used to detect if the given @var{insn} loads a global\ + variable's address from GOT with the form of\ + @smallexample\ + (set @var{address_reg} (mem (plus pic_reg @var{offset_reg})))\ + @end smallexample\ + If so return the global variable whose address will be loaded and fill in\ + @var{offset_insn} and @var{offset_reg}. @var{offset_reg} is set at\ + @var{offset_insn} to hold the offset from GOT base to the GOT entry of the\ + global variable. Otherwise return @code{NULL_RTX}.", + rtx, (rtx insn, rtx *offset_reg, rtx *offset_insn), + NULL) + +/* This function checks if it satisfies the target dependent conditions + that we can simplify GOT accesses. */ +DEFHOOK +(can_simplify_got_access, +"This hook determines if it satisfy the target dependent conditions to do\ + simplify-got when given the number of global variable accessing and the\ + number of accessed symbols. If the returned value is false the GOT access\ + insns will not be rewritten. Otherwise we will rewrite these insns.", + bool, (int n_symbol, int n_access), + NULL) + +/* This function does the actual rewriting of GOT accesses. */ +DEFHOOK +(load_global_address, +"This hook does the actual rewriting of GOT access insn @var{load_insn}.\ + The global variable is @var{symbol}. The global address should be loaded\ + into @var{address_reg}. The register @var{offset_reg} was previously set\ + in insn @var{offset_insn} to hold the offset from GOT base to the GOT\ + entry of the global variable. Now it can be used as a scratch register.", + void, (rtx symbol, rtx offset_reg, rtx address_reg, rtx load_insn, + rtx offset_insn), + NULL) + +HOOK_VECTOR_END (got_access) + +/* For targets that need to mark extra registers as live on entry to + the function, they should define this target hook and set their + bits in the bitmap passed in. */ +DEFHOOK +(extra_live_on_entry, + "", + void, (bitmap regs), + hook_void_bitmap) + +/* Determine the type of unwind info to emit for debugging. */ +DEFHOOK +(debug_unwind_info, + "", + enum unwind_info_type, (void), + default_debug_unwind_info) + +/* Determine the type of unwind info to emit for exceptions. */ +DEFHOOK +(except_unwind_info, + "", + enum unwind_info_type, (struct gcc_options *opts), + default_except_unwind_info) + +/* Leave the boolean fields at the end. */ + +/* True if unwinding tables should be generated by default. */ +DEFHOOKPOD +(unwind_tables_default, + "", + bool, false) + +/* True if arbitrary sections are supported. */ +DEFHOOKPOD +(have_named_sections, + "", + bool, false) + +/* True if we can create zeroed data by switching to a BSS section + and then using ASM_OUTPUT_SKIP to allocate the space. */ +DEFHOOKPOD +(have_switchable_bss_sections, + "", + bool, false) + +/* True if "native" constructors and destructors are supported, + false if we're using collect2 for the job. */ +DEFHOOKPOD +(have_ctors_dtors, + "", + bool, false) + +/* True if thread-local storage is supported. */ +DEFHOOKPOD +(have_tls, + "", + bool, false) + +/* True if a small readonly data section is supported. */ +DEFHOOKPOD +(have_srodata_section, + "", + bool, false) + +/* True if EH frame info sections should be zero-terminated. */ +DEFHOOKPOD +(terminate_dw2_eh_frame_info, + "", + bool, true) + +/* True if #NO_APP should be emitted at the beginning of assembly output. */ +DEFHOOKPOD +(asm_file_start_app_off, + "", + bool, false) + +/* True if output_file_directive should be called for main_input_filename + at the beginning of assembly output. */ +DEFHOOKPOD +(asm_file_start_file_directive, + "", + bool, false) + +DEFHOOKPOD +(handle_pragma_extern_prefix, +"True if @code{#pragma extern_prefix} is to be supported.", + bool, 0) + +/* True if the target is allowed to reorder memory accesses unless + synchronization is explicitly requested. */ +DEFHOOKPOD +(relaxed_ordering, + "", + bool, false) + +/* Returns true if we should generate exception tables for use with the + ARM EABI. The effects the encoding of function exception specifications. */ +DEFHOOKPOD +(arm_eabi_unwinder, + "", + bool, false) + +DEFHOOKPOD +(want_debug_pub_sections, + "True if the @code{.debug_pubtypes} and @code{.debug_pubnames} sections\ + should be emitted. These sections are not used on most platforms, and\ + in particular GDB does not use them.", + bool, true) + +DEFHOOKPOD +(delay_sched2, "True if sched2 is not to be run at its normal place. \ +This usually means it will be run as part of machine-specific reorg.", +bool, false) + +DEFHOOKPOD +(delay_vartrack, "True if vartrack is not to be run at its normal place. \ +This usually means it will be run as part of machine-specific reorg.", +bool, false) + +/* Leave the boolean fields at the end. */ + +/* Empty macro arguments are undefined in C90, so use an empty macro. */ +#define C90_EMPTY_HACK +/* Close the 'struct gcc_target' definition. */ +HOOK_VECTOR_END (C90_EMPTY_HACK) + +HOOK_VECTOR (TARGETCM_INITIALIZER, gcc_targetcm) + +/* Handle target switch CODE (an OPT_* value). ARG is the argument + passed to the switch; it is NULL if no argument was. VALUE is the + value of ARG if CODE specifies a UInteger option, otherwise it is + 1 if the positive form of the switch was used and 0 if the negative + form was. Return true if the switch was valid. */ +DEFHOOK +(handle_c_option, + "", + bool, (size_t code, const char *arg, int value), + default_handle_c_option) + +/* Targets may provide a string object type that can be used within + and between C, C++, and Objective-C dialects. */ + +DEFHOOK +(objc_construct_string_object, + "Targets may provide a string object type that can be used within\ + and between C, C++ and their respective Objective-C dialects.\ + A string object might, for example, embed encoding and length information.\ + These objects are considered opaque to the compiler and handled as references.\ + An ideal implementation makes the composition of the string object\ + match that of the Objective-C @code{NSString} (@code{NXString} for GNUStep),\ + allowing efficient interworking between C-only and Objective-C code.\ + If a target implements string objects then this hook should return a\ + reference to such an object constructed from the normal `C' string\ + representation provided in @var{string}.\ + At present, the hook is used by Objective-C only, to obtain a\ + common-format string object when the target provides one.", + tree, (tree string), + NULL) + +DEFHOOK +(string_object_ref_type_p, + "If a target implements string objects then this hook should return\ + @code{true} if @var{stringref} is a valid reference to such an object.", + bool, (const_tree stringref), + hook_bool_const_tree_false) + +DEFHOOK +(check_string_object_format_arg, + "If a target implements string objects then this hook should should\ + provide a facility to check the function arguments in @var{args_list}\ + against the format specifiers in @var{format_arg} where the type of\ + @var{format_arg} is one recognized as a valid string reference type.", + void, (tree format_arg, tree args_list), + NULL) + +HOOK_VECTOR_END (C90_EMPTY_HACK) |