/* Data structure definitions for a generic GCC target.
- Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
+ 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
#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 *);
+
struct stdarg_info;
+struct spec_info_def;
/* The struct used by the secondary_reload target hook. */
typedef struct secondary_reload_info
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);
between the already scheduled insn (first parameter) and the
the second insn (second parameter). */
bool (* is_costly_dependence) (rtx, rtx, rtx, 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);
+
+ /* 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);
+
+ /* 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. */
+ int (* speculate_insn) (rtx, int, rtx *);
+
+ /* 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);
+
+ /* 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. */
+ rtx (* gen_check) (rtx, rtx, bool);
+
+ /* 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. */
+ bool (* first_cycle_multipass_dfa_lookahead_guard_spec) (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 *);
} sched;
/* Functions relating to vectorization. */
by the vectorizer, and return the decl of the target builtin
function. */
tree (* builtin_mask_for_load) (void);
+
+ /* Returns a code for builtin that realizes vectorized version of
+ function, or NULL_TREE if not available. */
+ tree (* builtin_vectorized_function) (unsigned, tree);
+
+ /* 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. */
+ tree (* builtin_mul_widen_even) (tree);
+ tree (* builtin_mul_widen_odd) (tree);
} vectorize;
/* The initial value of target_flags. */
/* Return true if anonymous bitfields affect structure alignment. */
bool (* align_anon_bitfield) (void);
+ /* Return true if volatile bitfields should use the narrowest type possible.
+ Return false if they should use the container type. */
+ bool (* narrow_volatile_bitfield) (void);
+
/* Set up target-specific built-in functions. */
void (* init_builtins) (void);
rtx (* expand_builtin) (tree exp, rtx target, rtx subtarget,
enum machine_mode mode, int ignore);
- /* Expand a target-specific library builtin. */
- rtx (* expand_library_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
the reciprocal. */
unsigned int (* min_divisions_for_recip_mul) (enum machine_mode mode);
+ /* 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. */
+ int (* mode_rep_extended) (enum machine_mode mode,
+ enum machine_mode mode_rep);
+
/* True if MODE is valid for a pointer in __attribute__((mode("MODE"))). */
bool (* valid_pointer_mode) (enum machine_mode mode);
/* Returns true if __aeabi_atexit should be used to register static
destructors. */
bool (*use_aeabi_atexit) (void);
+ /* Returns true if target may use atexit in the same manner as
+ __cxa_atexit to register static destructors. */
+ bool (*use_atexit_for_cxa_atexit) (void);
/* 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 (*adjust_class_at_definition) (tree type);
} cxx;
-
+
/* 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. */
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