/* Output the assembler code for function exit. */
void (* function_epilogue) (FILE *, HOST_WIDE_INT);
- /* Switch to an arbitrary section NAME with attributes as
- specified by FLAGS. */
- void (* named_section) (const char *, unsigned int);
+ /* 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. */
+ void (* named_section) (const char *name, unsigned int flags, tree decl);
/* Switch to the section that holds the exception table. */
void (* exception_section) (void);
for SELECT_SECTION. */
void (* unique_section) (tree, int);
+ /* Tell assembler to switch to the readonly data section associated
+ with function DECL. */
+ void (* function_rodata_section) (tree);
+
/* Output a constructor for a symbol with a given priority. */
void (* constructor) (rtx, int);
/* 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
+ linker to not dead code strip this symbol. */
+ void (*mark_decl_preserved) (const char *);
+
} asm_out;
/* Functions relating to instruction scheduling. */
by two parameter values (head and tail correspondingly). */
void (* dependencies_evaluation_hook) (rtx, rtx);
- /* The following member value is a pointer to a function returning
- nonzero if we should use DFA based scheduling. The default is
- to use the old pipeline scheduler. */
- int (* use_dfa_pipeline_interface) (void);
- /* The values of all the following members are used only for the
- DFA based scheduler: */
/* 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
rtx (* dfa_pre_cycle_insn) (void);
void (* init_dfa_post_cycle_insn) (void);
rtx (* dfa_post_cycle_insn) (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
try to choose ready insn which permits to start maximum number of
insns on the same cycle. */
int (* first_cycle_multipass_dfa_lookahead) (void);
+
/* 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. */
int (* first_cycle_multipass_dfa_lookahead_guard) (rtx);
+
/* 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
the previous insn has been issued and the current processor
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
+ 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 scheduler. The last argument is the distance in cycles
+ 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);
} sched;
+ /* Functions relating to vectorization. */
+ struct vectorize
+ {
+ /* The following member value is a pointer to a function called
+ by the vectorizer, and return the decl of the target builtin
+ function. */
+ tree (* builtin_mask_for_load) (void);
+ } vectorize;
+
+ /* Return machine mode for filter value. */
+ enum machine_mode (* eh_return_filter_mode) (void);
+
/* Given two decls, merge their attributes and return the result. */
tree (* merge_decl_attributes) (tree, tree);
rtx (* expand_builtin) (tree exp, rtx target, rtx subtarget,
enum machine_mode mode, int ignore);
+ /* Fold a target-specific builtin. */
+ tree (* fold_builtin) (tree exp, 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. */
/* Undo the effects of encode_section_info on the symbol string. */
const char * (* strip_name_encoding) (const char *);
+ /* If shift optabs for MODE are known to always truncate the shift count,
+ return the mask that they apply. Return 0 otherwise. */
+ unsigned HOST_WIDE_INT (* shift_truncation_mask) (enum machine_mode mode);
+
/* True if MODE is valid for a pointer in __attribute__((mode("MODE"))). */
bool (* valid_pointer_mode) (enum machine_mode mode);
+ /* 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. */
+ bool (* scalar_mode_supported_p) (enum machine_mode mode);
+
+ /* Similarly for vector modes. "Supported" here is less strict. At
+ least some operations are supported; need to check optabs or builtins
+ for further details. */
+ bool (* vector_mode_supported_p) (enum machine_mode mode);
+
/* True if a vector is opaque. */
bool (* vector_opaque_p) (tree);
the port wishes to automatically clobber for all asms. */
tree (* md_asm_clobbers) (tree);
+ /* 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. */
+ int (* dwarf_calling_convention) (tree);
+
+ /* 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. */
+ void (* dwarf_handle_frame_unspec) (const char *, rtx, int);
+
/* Functions relating to calls - argument passing, returns, etc. */
struct calls {
bool (*promote_function_args) (tree fntype);
/* ??? 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);
+
+ /* 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);
+
+ /* 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. */
+ int (* arg_partial_bytes) (CUMULATIVE_ARGS *ca, enum machine_mode mode,
+ tree type, bool named);
} calls;
/* Functions specific to the C++ frontend. */
/* Allows backends to perform additional processing when
deciding if a class should be exported or imported. */
int (*import_export_class) (tree, int);
+ /* Returns true if constructors and destructors return "this". */
+ bool (*cdtor_returns_this) (void);
+ /* 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. */
+ bool (*key_method_may_be_inline) (void);
+ /* Returns true if all class data (virtual tables, type info,
+ etc.) should be exported from the current DLL, even when the
+ associated class is not exported. */
+ bool (*export_class_data) (void);
} cxx;
/* Leave the boolean fields at the end. */
/* True if #pragma extern_prefix is to be supported. */
bool handle_pragma_extern_prefix;
- /* True if the RTL prologue and epilogue should be expanded after all
- passes that modify the instructions (and not merely reorder them)
- have been run. */
- bool late_rtl_prologue_epilogue;
+ /* True if the target is allowed to reorder memory accesses unless
+ synchronization is explicitly requested. */
+ bool relaxed_ordering;
/* Leave the boolean fields at the end. */
};
OSDN Git Service
