/* Data structure definitions for a generic GCC target.
- Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
+ 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 2, or (at your option) any
-later version.
+ 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.
+ 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; if not, write to the Free Software
-Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ 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! */
- 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! */
/* This file contains a data structure that describes a GCC target.
At present it is incomplete, but in future it should grow to
#include "tm.h"
#include "insn-modes.h"
+/* Types used by the record_gcc_switches() target function. */
+typedef enum
+{
+ SWITCH_TYPE_PASSED, /* A switch passed on the command line. */
+ SWITCH_TYPE_ENABLED, /* An option that is currently enabled. */
+ SWITCH_TYPE_DESCRIPTIVE, /* Descriptive text, not a switch or option. */
+ SWITCH_TYPE_LINE_START, /* Please emit any necessary text at the start of a line. */
+ SWITCH_TYPE_LINE_END /* Please emit a line terminator. */
+}
+print_switch_type;
+
+typedef int (* print_switch_fn_type) (print_switch_type, const char *);
+
+/* An example implementation for ELF targets. Defined in varasm.c */
+extern int elf_record_gcc_switches (print_switch_type type, const char *);
+
+/* Some places still assume that all pointer or address modes are the
+ standard Pmode and ptr_mode. These optimizations become invalid if
+ the target actually supports multiple different modes. For now,
+ we disable such optimizations on such targets, using this function. */
+extern bool target_default_pointer_address_modes_p (void);
+
struct stdarg_info;
struct spec_info_def;
int t_icode; /* Actually an enum insn_code - see above. */
} secondary_reload_info;
+/* This is defined in sched-int.h . */
+struct _dep;
+
+/* This is defined in ddg.h . */
+struct ddg;
+
+/* This is defined in cfgloop.h . */
+struct loop;
+
+/* Assembler instructions for creating various kinds of integer object. */
+
+struct asm_int_op
+{
+ const char *hi;
+ const char *si;
+ const char *di;
+ const char *ti;
+};
+
+/* The target structure. This holds all the backend hooks. */
struct gcc_target
{
/* Assembler instructions for creating various kinds of integer object. */
const char *byte_op;
- struct asm_int_op
- {
- const char *hi;
- const char *si;
- const char *di;
- const char *ti;
- } aligned_op, unaligned_op;
+ struct asm_int_op aligned_op, unaligned_op;
/* 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
/* Output code that will globalize a label. */
void (* globalize_label) (FILE *, const char *);
+ /* Output code that will globalize a declaration. */
+ void (* globalize_decl_name) (FILE *, tree);
+
/* 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
which this section is associated. */
void (* named_section) (const char *name, unsigned int flags, tree decl);
+ /* 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. */
+ int (*reloc_rw_mask) (void);
+
/* 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.
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. */
- bool (* can_output_mi_thunk) (tree thunk_decl, HOST_WIDE_INT delta,
+ bool (* can_output_mi_thunk) (const_tree thunk_decl, HOST_WIDE_INT delta,
HOST_WIDE_INT vcall_offset,
- tree function_decl);
+ const_tree function_decl);
/* Output any boilerplate text needed at the beginning of a
translation unit. */
translation unit. */
void (*file_end) (void);
+ /* Output any boilerplace text needed at the end of a
+ translation unit before debug and unwind info is emitted. */
+ void (*code_end) (void);
+
/* Output an assembler pseudo-op to declare a library function name
external. */
void (*external_libcall) (rtx);
- /* Output an assembler directive to mark decl live. This instructs
+ /* Output an assembler directive to mark decl live. This instructs
linker to not dead code strip this symbol. */
void (*mark_decl_preserved) (const char *);
+ /* Output a record of the command line switches that have been passed. */
+ print_switch_fn_type record_gcc_switches;
+ /* 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. */
+ const char * record_gcc_switches_section;
+
/* Output the definition of a section anchor. */
void (*output_anchor) (rtx);
/* Output a DTP-relative reference to a TLS symbol. */
void (*output_dwarf_dtprel) (FILE *file, int size, rtx x);
+ /* Some target machines need to postscan each insn after it is output. */
+ void (*final_postscan_insn) (FILE *, rtx, rtx *, int);
+
+ /* Emit the trampoline template. This hook may be NULL. */
+ void (*trampoline_template) (FILE *);
} asm_out;
/* Functions relating to instruction scheduling. */
/* 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. */
- int (* adjust_cost) (rtx insn, rtx link, rtx def_insn, int cost);
+ int (* adjust_cost) (rtx insn, rtx link, rtx dep_insn, int cost);
/* Adjust the priority of an insn as you see fit. Returns the new
priority. */
/* Finalize machine-dependent scheduling code. */
void (* md_finish) (FILE *, int);
- /* Initialize machine-dependent function while scheduling code. */
+ /* Initialize machine-dependent function wide scheduling code. */
void (* md_init_global) (FILE *, int, int);
/* Finalize machine-dependent function wide scheduling code. */
void (* init_dfa_post_cycle_insn) (void);
rtx (* dfa_post_cycle_insn) (void);
+ /* 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. */
+ void (* dfa_pre_advance_cycle) (void);
+ void (* dfa_post_advance_cycle) (void);
+
/* 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
cycle. */
int (* dfa_new_cycle) (FILE *, int, rtx, int, int, int *);
- /* 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 passed as the first parameter, and the insn passed as
- the second parameter. The third parameter is the INSN_DEPEND
- link that represents the dependence between the two insns. The
- fourth argument is the cost of the dependence as estimated by
+ /* 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
- the second insn (second parameter). */
- bool (* is_costly_dependence) (rtx, rtx, rtx, int, int);
+ second insn (second parameter). */
+ bool (* is_costly_dependence) (struct _dep *_dep, int, int);
/* 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 of type DEP_TYPE. The default is to make no adjustment. */
- int (* adjust_cost_2) (rtx insn, int, rtx def_insn, int cost);
+ int (* adjust_cost_2) (rtx insn, int, rtx dep_insn, int cost, int dw);
/* 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. */
void (* h_i_d_extended) (void);
-
+
+ /* Next 5 functions are for multi-point scheduling. */
+
+ /* Allocate memory for scheduler context. */
+ void *(* alloc_sched_context) (void);
+
+ /* Fills the context from the local machine scheduler context. */
+ void (* init_sched_context) (void *, bool);
+
+ /* Sets local machine scheduler context to a saved value. */
+ void (* set_sched_context) (void *);
+
+ /* Clears a scheduler context so it becomes like after init. */
+ void (* clear_sched_context) (void *);
+
+ /* Frees the scheduler context. */
+ void (* free_sched_context) (void *);
+
/* 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
/* The following member value is a pointer to a function called
by the insn scheduler. It should return true if the check instruction
- corresponding to the instruction passed as the parameter needs a
- recovery block. */
- bool (* needs_block_p) (rtx);
+ passed as the parameter needs a recovery block. */
+ bool (* needs_block_p) (int);
/* The following member value is a pointer to a function called
by the insn scheduler. It should return a pattern for the check
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. */
- rtx (* gen_check) (rtx, rtx, bool);
+ rtx (* gen_spec_check) (rtx, rtx, int);
/* The following member value is a pointer to a function controlling
what insns from the ready insn queue will be considered for the
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. */
- bool (* first_cycle_multipass_dfa_lookahead_guard_spec) (rtx);
+ bool (* first_cycle_multipass_dfa_lookahead_guard_spec) (const_rtx);
/* 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. */
void (* set_sched_flags) (struct spec_info_def *);
+
+ /* Return speculation types of the instruction passed as the parameter. */
+ int (* get_insn_spec_ds) (rtx);
+
+ /* Return speculation types that are checked for the instruction passed as
+ the parameter. */
+ int (* get_insn_checked_ds) (rtx);
+
+ /* Return bool if rtx scanning should just skip current layer and
+ advance to the inner rtxes. */
+ bool (* skip_rtx_p) (const_rtx);
+
+ /* 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. */
+ int (* sms_res_mii) (struct ddg *);
} sched;
/* Functions relating to vectorization. */
/* Returns a code for builtin that realizes vectorized version of
function, or NULL_TREE if not available. */
- tree (* builtin_vectorized_function) (unsigned, tree);
+ tree (* builtin_vectorized_function) (tree, tree, tree);
+
+ /* Returns a function declaration for a builtin that realizes the
+ vector conversion, or NULL_TREE if not available. */
+ tree (* builtin_conversion) (unsigned, tree, tree);
/* Target builtin that implements vector widening multiplication.
- builtin_mul_widen_eve computes the element-by-element products
+ 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. */
tree (* builtin_mul_widen_even) (tree);
tree (* builtin_mul_widen_odd) (tree);
+
+ /* Returns the cost to be added to the overheads involved with
+ executing the vectorized version of a loop. */
+ int (*builtin_vectorization_cost) (bool);
+
+ /* Return true if vector alignment is reachable (by peeling N
+ iterations) for the given type. */
+ bool (* vector_alignment_reachable) (const_tree, bool);
+
+ /* Target builtin that implements vector permute. */
+ tree (* builtin_vec_perm) (tree, tree*);
+
+ /* Return true if a vector created for builtin_vec_perm is valid. */
+ bool (* builtin_vec_perm_ok) (tree, tree);
+
+ /* 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. */
+ bool (* builtin_support_vector_misalignment) (enum machine_mode,
+ const_tree, int, bool);
} vectorize;
/* The initial value of target_flags. */
int default_target_flags;
+ /* 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. */
+ void (* override_options_after_change) (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
form was. Return true if the switch was valid. */
bool (* handle_option) (size_t code, const char *arg, int value);
+ /* Display extra, target specific information in response to a
+ --target-help switch. */
+ void (* target_help) (void);
+
/* Return machine mode for filter value. */
enum machine_mode (* eh_return_filter_mode) (void);
+ /* Return machine mode for libgcc expanded cmp instructions. */
+ enum machine_mode (* libgcc_cmp_return_mode) (void);
+
+ /* Return machine mode for libgcc expanded shift instructions. */
+ enum machine_mode (* libgcc_shift_count_mode) (void);
+
+ /* Return machine mode to be used for _Unwind_Word type. */
+ enum machine_mode (* unwind_word_mode) (void);
+
/* Given two decls, merge their attributes and return the result. */
tree (* merge_decl_attributes) (tree, tree);
/* 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). */
- int (* comp_type_attributes) (tree type1, tree type2);
+ int (* comp_type_attributes) (const_tree type1, const_tree type2);
/* Assign default attributes to the newly defined TYPE. */
void (* set_default_type_attributes) (tree type);
/* Return true if FNDECL (which has at least one machine attribute)
can be inlined despite its machine attributes, false otherwise. */
- bool (* function_attribute_inlinable_p) (tree fndecl);
+ bool (* function_attribute_inlinable_p) (const_tree fndecl);
/* Return true if bitfields in RECORD_TYPE should follow the
Microsoft Visual C++ bitfield layout rules. */
- bool (* ms_bitfield_layout_p) (tree record_type);
+ bool (* ms_bitfield_layout_p) (const_tree record_type);
/* True if the target supports decimal floating point. */
bool (* decimal_float_supported_p) (void);
+ /* True if the target supports fixed-point. */
+ bool (* fixed_point_supported_p) (void);
+
/* Return true if anonymous bitfields affect structure alignment. */
bool (* align_anon_bitfield) (void);
/* Set up target-specific built-in functions. */
void (* init_builtins) (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. */
+ tree (* builtin_decl) (unsigned code, bool initialize_p);
+
/* Expand a target-specific builtin. */
rtx (* expand_builtin) (tree exp, rtx target, rtx subtarget,
enum machine_mode mode, int ignore);
/* 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. */
- tree (*resolve_overloaded_builtin) (tree decl, tree params);
+ *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. */
+ tree (*resolve_overloaded_builtin) (unsigned int /*location_t*/,
+ tree decl, void *params);
/* Fold a target-specific builtin. */
tree (* fold_builtin) (tree fndecl, tree arglist, bool ignore);
- /* For a vendor-specific fundamental TYPE, return a pointer to
- a statically-allocated string containing the C++ mangling for
- TYPE. In all other cases, return NULL. */
- const char * (* mangle_fundamental_type) (tree type);
+ /* Returns a code for a target-specific builtin that implements
+ reciprocal of the function, or NULL_TREE if not available. */
+ tree (* builtin_reciprocal) (unsigned, bool, bool);
+
+ /* 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. */
+ const char * (* mangle_type) (const_tree type);
/* Make any adjustments to libfunc names needed for this target. */
void (* init_libfuncs) (void);
/* Return a register class for which branch target register
optimizations should be applied. */
- int (* branch_target_register_class) (void);
+ enum reg_class (* branch_target_register_class) (void);
/* Return true if branch target register optimizations should include
callee-saved registers that are not already live during the current
already been generated. */
bool (* branch_target_register_callee_saved) (bool after_pe_gen);
+ /* Return true if the target supports conditional execution. */
+ bool (* have_conditional_execution) (void);
+
+ /* Return a new value for loop unroll size. */
+ unsigned (* loop_unroll_adjust) (unsigned nunroll, struct loop *loop);
+
/* True if the constant X cannot be placed in the constant pool. */
bool (* cannot_force_const_mem) (rtx);
bool (* cannot_copy_insn_p) (rtx);
/* True if X is considered to be commutative. */
- bool (* commutative_p) (rtx, int);
+ bool (* commutative_p) (const_rtx, int);
+
+ /* 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. */
+ rtx (* legitimize_address) (rtx, rtx, enum machine_mode);
/* Given an address RTX, undo the effects of LEGITIMIZE_ADDRESS. */
rtx (* delegitimize_address) (rtx);
+ /* Given an address RTX, say whether it is valid. */
+ bool (* legitimate_address_p) (enum machine_mode, rtx, bool);
+
/* True if the given constant can be put into an object_block. */
- bool (* use_blocks_for_constant_p) (enum machine_mode, rtx);
+ bool (* use_blocks_for_constant_p) (enum machine_mode, const_rtx);
/* The minimum and maximum byte offsets for anchored addresses. */
HOST_WIDE_INT min_anchor_offset;
HOST_WIDE_INT max_anchor_offset;
/* True if section anchors can be used to access the given symbol. */
- bool (* use_anchors_for_symbol_p) (rtx);
+ bool (* use_anchors_for_symbol_p) (const_rtx);
/* 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. */
bool (*function_ok_for_sibcall) (tree decl, tree exp);
+ /* 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. */
+ void (*set_current_function) (tree fndecl);
+
/* True if EXP should be placed in a "small data" section. */
- bool (* in_small_data_p) (tree);
+ bool (* in_small_data_p) (const_tree);
/* True if EXP names an object for which name resolution must resolve
- to the current module. */
- bool (* binds_local_p) (tree);
+ to the current executable or shared library. */
+ bool (* binds_local_p) (const_tree);
+
+ /* 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. */
+ tree (* mangle_decl_assembler_name) (tree decl, tree id);
/* Do something target-specific to record properties of the DECL into
the associated SYMBOL_REF. */
/* True if MODE is valid for a pointer in __attribute__((mode("MODE"))). */
bool (* valid_pointer_mode) (enum machine_mode mode);
+ /* Support for named address spaces. */
+ struct addr_space {
+ /* MODE to use for a pointer into another address space. */
+ enum machine_mode (* pointer_mode) (addr_space_t);
+
+ /* MODE to use for an address in another address space. */
+ enum machine_mode (* address_mode) (addr_space_t);
+
+ /* True if MODE is valid for a pointer in __attribute__((mode("MODE")))
+ in another address space. */
+ bool (* valid_pointer_mode) (enum machine_mode, addr_space_t);
+
+ /* True if an address is a valid memory address to a given named address
+ space for a given mode. */
+ bool (* legitimate_address_p) (enum machine_mode, rtx, bool, addr_space_t);
+
+ /* 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. */
+ rtx (* legitimize_address) (rtx, rtx, enum machine_mode, addr_space_t);
+
+ /* True if one named address space is a subset of another named address. */
+ bool (* subset_p) (addr_space_t, addr_space_t);
+
+ /* Function to convert an rtl expression from one address space to
+ another. */
+ rtx (* convert) (rtx, tree, tree);
+
+ } addr_space;
+
/* 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. */
for further details. */
bool (* vector_mode_supported_p) (enum machine_mode mode);
- /* True if a vector is opaque. */
- bool (* vector_opaque_p) (tree);
-
/* 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. */
- bool (* rtx_costs) (rtx x, int code, int outer_code, int *total);
+ bool (* rtx_costs) (rtx x, int code, int outer_code, int *total, bool speed);
/* Compute the cost of X, used as an address. Never called with
invalid addresses. */
- int (* address_cost) (rtx x);
+ int (* address_cost) (rtx x, bool speed);
/* Return where to allocate pseudo for a given hard register initial
value. */
rtx (* allocate_initial_value) (rtx x);
+ /* Return nonzero if evaluating UNSPEC[_VOLATILE] X might cause a trap.
+ FLAGS has the same meaning as in rtlanal.c: may_trap_p_1. */
+ int (* unspec_may_trap_p) (const_rtx x, unsigned flags);
+
/* 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
hook should return NULL_RTX. */
rtx (* dwarf_register_span) (rtx);
+ /* 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. */
+ void (* init_dwarf_reg_sizes_extra) (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
/* Create the __builtin_va_list type. */
tree (* build_builtin_va_list) (void);
+ /* Get the cfun/fndecl calling abi __builtin_va_list type. */
+ tree (* fn_abi_va_list) (tree);
+
+ /* Get the __builtin_va_list type dependent on input type. */
+ tree (* canonical_va_list_type) (tree);
+
+ /* Expand the __builtin_va_start builtin. */
+ void (* expand_builtin_va_start) (tree valist, rtx nextarg);
+
/* Gimplifies a VA_ARG_EXPR. */
- tree (* gimplify_va_arg_expr) (tree valist, tree type, tree *pre_p,
- tree *post_p);
+ tree (* gimplify_va_arg_expr) (tree valist, tree type, gimple_seq *pre_p,
+ gimple_seq *post_p);
/* Validity-checking routines for PCH files, target-specific.
get_pch_validity returns a pointer to the data to be stored,
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. */
- int (* dwarf_calling_convention) (tree);
+ int (* dwarf_calling_convention) (const_tree);
/* This target hook allows the backend to emit frame-related insns that
contain UNSPECs or UNSPEC_VOLATILEs. The call frame debugging info
void (* dwarf_handle_frame_unspec) (const char *, rtx, int);
/* Perform architecture specific checking of statements gimplified
- from VA_ARG_EXPR. LHS is left hand side of MODIFY_EXPR, RHS
- is right hand side. Returns true if the statements doesn't need
- to be checked for va_list references. */
- bool (* stdarg_optimize_hook) (struct stdarg_info *ai, tree lhs, tree rhs);
+ from VA_ARG_EXPR. STMT is the statement. Returns true if the statement
+ doesn't need to be checked for va_list references. */
+ bool (* stdarg_optimize_hook) (struct stdarg_info *ai, const_gimple stmt);
/* This target hook allows the operating system to override the DECL
that represents the external variable that contains the stack
/* Returns NULL if target supports the insn within a doloop block,
otherwise it returns an error message. */
- const char * (*invalid_within_doloop) (rtx);
+ const char * (*invalid_within_doloop) (const_rtx);
/* DECL is a variable or function with __attribute__((dllimport))
specified. Use this hook if the target needs to add extra validation
checks to handle_dll_attribute (). */
- bool (* valid_dllimport_attribute_p) (tree decl);
+ bool (* valid_dllimport_attribute_p) (const_tree decl);
+
+ /* If non-zero, align constant anchors in CSE to a multiple of this
+ value. */
+ unsigned HOST_WIDE_INT const_anchor;
/* Functions relating to calls - argument passing, returns, etc. */
struct calls {
- bool (*promote_function_args) (tree fntype);
- bool (*promote_function_return) (tree fntype);
- bool (*promote_prototypes) (tree fntype);
+ enum machine_mode (*promote_function_mode) (const_tree type,
+ enum machine_mode mode,
+ int *punsignedp,
+ const_tree fntype,
+ int for_return);
+ bool (*promote_prototypes) (const_tree fntype);
rtx (*struct_value_rtx) (tree fndecl, int incoming);
- bool (*return_in_memory) (tree type, tree fndecl);
- bool (*return_in_msb) (tree type);
+ bool (*return_in_memory) (const_tree type, const_tree fndecl);
+ bool (*return_in_msb) (const_tree type);
/* 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. */
bool (*pass_by_reference) (CUMULATIVE_ARGS *ca, enum machine_mode mode,
- tree type, bool named_arg);
+ const_tree type, bool named_arg);
rtx (*expand_builtin_saveregs) (void);
/* Returns pretend_argument_size. */
/* Given a complex type T, return true if a parameter of type T
should be passed as two scalars. */
- bool (* split_complex_arg) (tree type);
+ bool (* split_complex_arg) (const_tree type);
/* 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. */
- bool (* must_pass_in_stack) (enum machine_mode mode, tree t);
+ bool (* must_pass_in_stack) (enum machine_mode mode, const_tree t);
/* 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. */
bool (* callee_copies) (CUMULATIVE_ARGS *ca, enum machine_mode mode,
- tree type, bool named);
+ const_tree type, bool named);
/* Return zero for arguments passed entirely on the stack or entirely
in registers. If passed in both, return the number of bytes passed
/* Return the diagnostic message string if function without a prototype
is not allowed for this 'val' argument; NULL otherwise. */
- const char *(*invalid_arg_for_unprototyped_fn) (tree typelist,
- tree funcdecl, tree val);
+ const char *(*invalid_arg_for_unprototyped_fn) (const_tree typelist,
+ const_tree funcdecl,
+ const_tree val);
/* Return an rtx for the return value location of the function
specified by FN_DECL_OR_TYPE with a return type of RET_TYPE. */
- rtx (*function_value) (tree ret_type, tree fn_decl_or_type,
+ rtx (*function_value) (const_tree ret_type, const_tree fn_decl_or_type,
bool outgoing);
+ /* Return the rtx for the result of a libcall of mode MODE,
+ calling the function FN_NAME. */
+ rtx (*libcall_value) (enum machine_mode, const_rtx);
+
/* Return an rtx for the argument pointer incoming to the
current function. */
rtx (*internal_arg_pointer) (void);
+
+ /* Update the current function stack boundary if needed. */
+ void (*update_stack_boundary) (void);
+
+ /* Handle stack alignment and return an rtx for Dynamic Realign
+ Argument Pointer if necessary. */
+ rtx (*get_drap_rtx) (void);
+
+ /* Return true if all function parameters should be spilled to the
+ stack. */
+ bool (*allocate_stack_slots_for_args) (void);
+
+ /* 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. */
+ rtx (*static_chain) (const_tree fndecl, bool incoming_p);
+
+ /* Fill in the trampoline at MEM with a call to FNDECL and a
+ static chain value of CHAIN. */
+ void (*trampoline_init) (rtx mem, tree fndecl, rtx chain);
+
+ /* Adjust the address of the trampoline in a target-specific way. */
+ rtx (*trampoline_adjust_address) (rtx addr);
} calls;
/* Return the diagnostic message string if conversion from FROMTYPE
to TOTYPE is not allowed, NULL otherwise. */
- const char *(*invalid_conversion) (tree fromtype, tree totype);
+ const char *(*invalid_conversion) (const_tree fromtype, const_tree totype);
/* Return the diagnostic message string if the unary operation OP is
not permitted on TYPE, NULL otherwise. */
- const char *(*invalid_unary_op) (int op, tree type);
+ const char *(*invalid_unary_op) (int op, const_tree type);
/* Return the diagnostic message string if the binary operation OP
is not permitted on TYPE1 and TYPE2, NULL otherwise. */
- const char *(*invalid_binary_op) (int op, tree type1, tree type2);
+ const char *(*invalid_binary_op) (int op, const_tree type1, const_tree type2);
+
+ /* Return the diagnostic message string if TYPE is not valid as a
+ function parameter type, NULL otherwise. */
+ const char *(*invalid_parameter_type) (const_tree type);
+
+ /* Return the diagnostic message string if TYPE is not valid as a
+ function return type, NULL otherwise. */
+ const char *(*invalid_return_type) (const_tree type);
+
+ /* 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. */
+ tree (*promoted_type) (const_tree type);
+
+ /* 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. */
+ tree (*convert_to_type) (tree type, tree expr);
+
+ /* Return the array of IRA cover classes for the current target. */
+ const enum reg_class *(*ira_cover_classes) (void);
/* Return the class for a secondary reload, and fill in extra information. */
enum reg_class (*secondary_reload) (bool, rtx, enum reg_class,
enum machine_mode,
- struct secondary_reload_info *);
+ secondary_reload_info *);
+
+ /* This target hook allows the backend to perform additional
+ processing while initializing for variable expansion. */
+ void (* expand_to_rtl_hook) (void);
+
+ /* This target hook allows the backend to perform additional
+ instantiations on rtx that are not actually in insns yet,
+ but will be later. */
+ void (* instantiate_decls) (void);
+
+ /* Return true if is OK to use a hard register REGNO as scratch register
+ in peephole2. */
+ bool (* hard_regno_scratch_ok) (unsigned int regno);
+
+ /* Return the smallest number of different values for which it is best to
+ use a jump-table instead of a tree of conditional branches. */
+ unsigned int (* case_values_threshold) (void);
+
+ /* Retutn true if a function must have and use a frame pointer. */
+ bool (* frame_pointer_required) (void);
+
+ /* Returns true if the compiler is allowed to try to replace register number
+ from-reg with register number to-reg. */
+ bool (* can_eliminate) (const int, const int);
+
+ /* Functions specific to the C family of frontends. */
+ struct c {
+ /* Return machine mode for non-standard suffix
+ or VOIDmode if non-standard suffixes are unsupported. */
+ enum machine_mode (*mode_for_suffix) (char);
+ } c;
/* Functions specific to the C++ frontend. */
struct cxx {
class data for classes whose virtual table will be emitted in
only one translation unit will not be COMDAT. */
bool (*class_data_always_comdat) (void);
+ /* 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. */
+ bool (*library_rtti_comdat) (void);
/* Returns true if __aeabi_atexit should be used to register static
destructors. */
bool (*use_aeabi_atexit) (void);
target modifications). */
void (*adjust_class_at_definition) (tree type);
} cxx;
-
+
+ /* Functions and data for emulated TLS support. */
+ struct emutls {
+ /* Name of the address and common functions. */
+ const char *get_address;
+ const char *register_common;
+
+ /* Prefixes for proxy variable and template. */
+ const char *var_section;
+ const char *tmpl_section;
+
+ /* Prefixes for proxy variable and template. */
+ const char *var_prefix;
+ const char *tmpl_prefix;
+
+ /* Function to generate field definitions of the proxy variable. */
+ tree (*var_fields) (tree, tree *);
+
+ /* Function to initialize a proxy variable. */
+ tree (*var_init) (tree, tree, tree);
+
+ /* Whether we are allowed to alter the usual alignment of the
+ proxy variable. */
+ bool var_align_fixed;
+
+ /* Whether we can emit debug information for TLS vars. */
+ bool debug_form_tls_address;
+ } emutls;
+
+ struct 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. */
+ bool (*valid_attribute_p) (tree, tree, tree, int);
+
+ /* Function to save any extra target state in the target options
+ structure. */
+ void (*save) (struct cl_target_option *);
+
+ /* Function to restore any extra target state from the target options
+ structure. */
+ void (*restore) (struct cl_target_option *);
+
+ /* Function to print any extra target state from the target options
+ structure. */
+ void (*print) (FILE *, int, struct cl_target_option *);
+
+ /* 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. */
+ bool (*pragma_parse) (tree, tree);
+
+ /* Function to determine if one function can inline another function. */
+ bool (*can_inline_p) (tree, tree);
+ } target_option;
+
/* 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. */
- void (*live_on_entry) (bitmap);
+ bits in the bitmap passed in. */
+ void (*live_on_entry) (bitmap);
/* True if unwinding tables should be generated by default. */
bool unwind_tables_default;
at the beginning of assembly output. */
bool file_start_file_directive;
- /* True if #pragma redefine_extname is to be supported. */
- bool handle_pragma_redefine_extname;
-
/* True if #pragma extern_prefix is to be supported. */
bool handle_pragma_extern_prefix;
extern struct gcc_target targetm;
+struct 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. */
+ bool (*handle_c_option) (size_t code, const char *arg, int value);
+};
+
+/* Each target can provide their own. */
+extern struct gcc_targetcm targetcm;
+
#endif /* GCC_TARGET_H */
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