/* Data structure definitions for a generic GCC target.
- Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
/* This is defined in ddg.h . */
struct ddg;
+/* 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
{
/* Functions that output assembler for the 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 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);
} asm_out;
/* Functions relating to instruction scheduling. */
/* 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. */
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 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) (const_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
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
/* 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*);
} vectorize;
/* The initial value of target_flags. */
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) (tree decl, void *params);
/* Fold a target-specific builtin. */
tree (* fold_builtin) (tree fndecl, tree arglist, bool ignore);
/* 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
/* True if X is considered to be commutative. */
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, const_rtx);
bool (* in_small_data_p) (const_tree);
/* True if EXP names an object for which name resolution must resolve
- to the current module. */
+ to the current executable or shared library. */
bool (* binds_local_p) (const_tree);
/* Modify and return the identifier of a DECL's external name,
for further details. */
bool (* vector_mode_supported_p) (enum machine_mode mode);
- /* True if a vector is opaque. */
- bool (* vector_opaque_p) (const_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. */
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,
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, const_tree lhs, const_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
checks to handle_dll_attribute (). */
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) (const_tree fntype);
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);
is not permitted on TYPE1 and TYPE2, NULL otherwise. */
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,
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);
+
/* Functions specific to the C family of frontends. */
struct c {
/* Return machine mode for non-standard suffix
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. */
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