/* Data structure definitions for a generic GCC target.
- Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ 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
/* 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;
/* 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
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);
/* 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. */
/* Returns a code for builtin that realizes vectorized version of
function, or NULL_TREE if not available. */
- tree (* builtin_vectorized_function) (unsigned, tree, tree);
+ tree (* builtin_vectorized_function) (tree, tree, tree);
- /* Returns a code for builtin that realizes vectorized version of
- conversion, or NULL_TREE if not available. */
- tree (* builtin_conversion) (unsigned, 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);
/* Target builtin that implements vector permute. */
tree (* builtin_vec_perm) (tree, tree*);
-} vectorize;
+
+ /* 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
/* 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);
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);
+ 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);
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);
/* 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. */
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);
- bool (*promote_function_return) (const_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) (const_tree type, const_tree fndecl);
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);
/* 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
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,
- struct secondary_reload_info *);
+ secondary_reload_info *);
/* This target hook allows the backend to perform additional
processing while initializing for variable expansion. */
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
/* 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 *);
/* Whether we can emit debug information for TLS vars. */
bool debug_form_tls_address;
- } emutls;
+ } emutls;
struct target_option_hooks {
/* Function to validate the attribute((option(...))) strings or NULL. If
/* 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;
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