X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Ftarghooks.c;h=93a2c305c8b80318833f236e5d83e05cbb1561dd;hb=046f323efd9149bb5d2d5638466e98ed238b7635;hp=e7bdf0b3cbc7e7c2562f8521bbc83a7f2f5ac4c2;hpb=22c2f6bdda9682df91ef7761d4b77c01e8bbcd37;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/targhooks.c b/gcc/targhooks.c index e7bdf0b3cbc..93a2c305c8b 100644 --- a/gcc/targhooks.c +++ b/gcc/targhooks.c @@ -1,11 +1,12 @@ /* Default target hook functions. - Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. + Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011 + Free Software Foundation, Inc. This file is part of GCC. GCC 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 +Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY @@ -14,9 +15,8 @@ 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 GCC; see the file COPYING. If not, write to the Free -Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301, USA. */ +along with GCC; see the file COPYING3. If not see +. */ /* The migration of target macros to target hooks works as follows: @@ -56,18 +56,39 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA #include "tree.h" #include "expr.h" #include "output.h" -#include "toplev.h" +#include "diagnostic-core.h" #include "function.h" #include "target.h" #include "tm_p.h" #include "target-def.h" #include "ggc.h" #include "hard-reg-set.h" +#include "regs.h" #include "reload.h" #include "optabs.h" #include "recog.h" +#include "intl.h" +#include "opts.h" +#include "tree-flow.h" +#include "tree-ssa-alias.h" +bool +default_legitimate_address_p (enum machine_mode mode ATTRIBUTE_UNUSED, + rtx addr ATTRIBUTE_UNUSED, + bool strict ATTRIBUTE_UNUSED) +{ +#ifdef GO_IF_LEGITIMATE_ADDRESS + /* Defer to the old implementation using a goto. */ + if (strict) + return strict_memory_address_p (mode, addr); + else + return memory_address_p (mode, addr); +#else + gcc_unreachable (); +#endif +} + void default_external_libcall (rtx fun ATTRIBUTE_UNUSED) { @@ -76,6 +97,49 @@ default_external_libcall (rtx fun ATTRIBUTE_UNUSED) #endif } +int +default_unspec_may_trap_p (const_rtx x, unsigned flags) +{ + int i; + + if (GET_CODE (x) == UNSPEC_VOLATILE + /* Any floating arithmetic may trap. */ + || (SCALAR_FLOAT_MODE_P (GET_MODE (x)) + && flag_trapping_math)) + return 1; + + for (i = 0; i < XVECLEN (x, 0); ++i) + { + if (may_trap_p_1 (XVECEXP (x, 0, i), flags)) + return 1; + } + + return 0; +} + +enum machine_mode +default_promote_function_mode (const_tree type ATTRIBUTE_UNUSED, + enum machine_mode mode, + int *punsignedp ATTRIBUTE_UNUSED, + const_tree funtype ATTRIBUTE_UNUSED, + int for_return ATTRIBUTE_UNUSED) +{ + if (for_return == 2) + return promote_mode (type, mode, punsignedp); + return mode; +} + +enum machine_mode +default_promote_function_mode_always_promote (const_tree type, + enum machine_mode mode, + int *punsignedp, + const_tree funtype ATTRIBUTE_UNUSED, + int for_return ATTRIBUTE_UNUSED) +{ + return promote_mode (type, mode, punsignedp); +} + + enum machine_mode default_cc_modes_compatible (enum machine_mode m1, enum machine_mode m2) { @@ -85,14 +149,17 @@ default_cc_modes_compatible (enum machine_mode m1, enum machine_mode m2) } bool -default_return_in_memory (tree type, - tree fntype ATTRIBUTE_UNUSED) +default_return_in_memory (const_tree type, + const_tree fntype ATTRIBUTE_UNUSED) { -#ifndef RETURN_IN_MEMORY return (TYPE_MODE (type) == BLKmode); -#else - return RETURN_IN_MEMORY (type); -#endif +} + +rtx +default_legitimize_address (rtx x, rtx orig_x ATTRIBUTE_UNUSED, + enum machine_mode mode ATTRIBUTE_UNUSED) +{ + return x; } rtx @@ -137,6 +204,24 @@ default_pretend_outgoing_varargs_named (CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED) enum machine_mode default_eh_return_filter_mode (void) { + return targetm.unwind_word_mode (); +} + +enum machine_mode +default_libgcc_cmp_return_mode (void) +{ + return word_mode; +} + +enum machine_mode +default_libgcc_shift_count_mode (void) +{ + return word_mode; +} + +enum machine_mode +default_unwind_word_mode (void) +{ return word_mode; } @@ -173,6 +258,13 @@ hook_bool_CUMULATIVE_ARGS_true (CUMULATIVE_ARGS * a ATTRIBUTE_UNUSED) return true; } +/* Return machine mode for non-standard suffix + or VOIDmode if non-standard suffixes are unsupported. */ +enum machine_mode +default_mode_for_suffix (char suffix ATTRIBUTE_UNUSED) +{ + return VOIDmode; +} /* The generic C++ ABI specifies this is a 64-bit value. */ tree @@ -211,7 +303,7 @@ default_cxx_get_cookie_size (tree type) bool hook_pass_by_reference_must_pass_in_stack (CUMULATIVE_ARGS *c ATTRIBUTE_UNUSED, - enum machine_mode mode ATTRIBUTE_UNUSED, tree type ATTRIBUTE_UNUSED, + enum machine_mode mode ATTRIBUTE_UNUSED, const_tree type ATTRIBUTE_UNUSED, bool named_arg ATTRIBUTE_UNUSED) { return targetm.calls.must_pass_in_stack (mode, type); @@ -223,19 +315,75 @@ hook_pass_by_reference_must_pass_in_stack (CUMULATIVE_ARGS *c ATTRIBUTE_UNUSED, bool hook_callee_copies_named (CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED, enum machine_mode mode ATTRIBUTE_UNUSED, - tree type ATTRIBUTE_UNUSED, bool named) + const_tree type ATTRIBUTE_UNUSED, bool named) { return named; } -/* Emit any directives required to unwind this instruction. */ +/* Emit to STREAM the assembler syntax for insn operand X. */ + +void +default_print_operand (FILE *stream ATTRIBUTE_UNUSED, rtx x ATTRIBUTE_UNUSED, + int code ATTRIBUTE_UNUSED) +{ +#ifdef PRINT_OPERAND + PRINT_OPERAND (stream, x, code); +#else + gcc_unreachable (); +#endif +} + +/* Emit to STREAM the assembler syntax for an insn operand whose memory + address is X. */ void -default_unwind_emit (FILE * stream ATTRIBUTE_UNUSED, - rtx insn ATTRIBUTE_UNUSED) +default_print_operand_address (FILE *stream ATTRIBUTE_UNUSED, + rtx x ATTRIBUTE_UNUSED) { - /* Should never happen. */ +#ifdef PRINT_OPERAND_ADDRESS + PRINT_OPERAND_ADDRESS (stream, x); +#else gcc_unreachable (); +#endif +} + +/* Return true if CODE is a valid punctuation character for the + `print_operand' hook. */ + +bool +default_print_operand_punct_valid_p (unsigned char code ATTRIBUTE_UNUSED) +{ +#ifdef PRINT_OPERAND_PUNCT_VALID_P + return PRINT_OPERAND_PUNCT_VALID_P (code); +#else + return false; +#endif +} + +/* The default implementation of TARGET_MANGLE_ASSEMBLER_NAME. */ +tree +default_mangle_assembler_name (const char *name ATTRIBUTE_UNUSED) +{ + const char *skipped = name + (*name == '*' ? 1 : 0); + const char *stripped = targetm.strip_name_encoding (skipped); + if (*name != '*' && user_label_prefix[0]) + stripped = ACONCAT ((user_label_prefix, stripped, NULL)); + return get_identifier (stripped); +} + +/* The default implementation of TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA. */ + +bool +default_asm_output_addr_const_extra (FILE *file ATTRIBUTE_UNUSED, + rtx x ATTRIBUTE_UNUSED) +{ +#ifdef OUTPUT_ADDR_CONST_EXTRA + OUTPUT_ADDR_CONST_EXTRA (file, x, fail); + return true; + +fail: +#endif + return false; } /* True if MODE is valid for the target. By "valid", we mean able to @@ -280,6 +428,10 @@ default_scalar_mode_supported_p (enum machine_mode mode) return false; case MODE_DECIMAL_FLOAT: + case MODE_FRACT: + case MODE_UFRACT: + case MODE_ACCUM: + case MODE_UACCUM: return false; default: @@ -287,6 +439,19 @@ default_scalar_mode_supported_p (enum machine_mode mode) } } +/* Make some target macros useable by target-independent code. */ +bool +targhook_words_big_endian (void) +{ + return !!WORDS_BIG_ENDIAN; +} + +bool +targhook_float_words_big_endian (void) +{ + return !!FLOAT_WORDS_BIG_ENDIAN; +} + /* True if the target supports decimal floating point. */ bool @@ -295,9 +460,17 @@ default_decimal_float_supported_p (void) return ENABLE_DECIMAL_FLOAT; } +/* True if the target supports fixed-point arithmetic. */ + +bool +default_fixed_point_supported_p (void) +{ + return ENABLE_FIXED_POINT; +} + /* NULL if INSN insn is valid within a low-overhead loop, otherwise returns an error message. - + This function checks whether a given INSN is valid within a low-overhead loop. If INSN is invalid it returns the reason for that, otherwise it returns NULL. A called function may clobber any special registers required @@ -306,24 +479,76 @@ default_decimal_float_supported_p (void) these cases. */ const char * -default_invalid_within_doloop (rtx insn) +default_invalid_within_doloop (const_rtx insn) { if (CALL_P (insn)) return "Function call in loop."; - - if (JUMP_P (insn) - && (GET_CODE (PATTERN (insn)) == ADDR_DIFF_VEC - || GET_CODE (PATTERN (insn)) == ADDR_VEC)) + + if (JUMP_TABLE_DATA_P (insn)) return "Computed branch in the loop."; - + return NULL; } /* Mapping of builtin functions to vectorized variants. */ tree -default_builtin_vectorized_function (enum built_in_function fn ATTRIBUTE_UNUSED, - tree type ATTRIBUTE_UNUSED) +default_builtin_vectorized_function (tree fndecl ATTRIBUTE_UNUSED, + tree type_out ATTRIBUTE_UNUSED, + tree type_in ATTRIBUTE_UNUSED) +{ + return NULL_TREE; +} + +/* Vectorized conversion. */ + +tree +default_builtin_vectorized_conversion (unsigned int code ATTRIBUTE_UNUSED, + tree dest_type ATTRIBUTE_UNUSED, + tree src_type ATTRIBUTE_UNUSED) +{ + return NULL_TREE; +} + +/* Default vectorizer cost model values. */ + +int +default_builtin_vectorization_cost (enum vect_cost_for_stmt type_of_cost, + tree vectype ATTRIBUTE_UNUSED, + int misalign ATTRIBUTE_UNUSED) +{ + switch (type_of_cost) + { + case scalar_stmt: + case scalar_load: + case scalar_store: + case vector_stmt: + case vector_load: + case vector_store: + case vec_to_scalar: + case scalar_to_vec: + case cond_branch_not_taken: + case vec_perm: + return 1; + + case unaligned_load: + case unaligned_store: + return 2; + + case cond_branch_taken: + return 3; + + default: + gcc_unreachable (); + } +} + +/* Reciprocal. */ + +tree +default_builtin_reciprocal (unsigned int fn ATTRIBUTE_UNUSED, + bool md_fn ATTRIBUTE_UNUSED, + bool sqrt ATTRIBUTE_UNUSED) { return NULL_TREE; } @@ -332,7 +557,7 @@ bool hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false ( CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED, enum machine_mode mode ATTRIBUTE_UNUSED, - tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) + const_tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) { return false; } @@ -341,7 +566,7 @@ bool hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true ( CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED, enum machine_mode mode ATTRIBUTE_UNUSED, - tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) + const_tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) { return true; } @@ -355,16 +580,50 @@ hook_int_CUMULATIVE_ARGS_mode_tree_bool_0 ( return 0; } -void +void +default_function_arg_advance (CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED, + enum machine_mode mode ATTRIBUTE_UNUSED, + const_tree type ATTRIBUTE_UNUSED, + bool named ATTRIBUTE_UNUSED) +{ + gcc_unreachable (); +} + +rtx +default_function_arg (CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED, + enum machine_mode mode ATTRIBUTE_UNUSED, + const_tree type ATTRIBUTE_UNUSED, + bool named ATTRIBUTE_UNUSED) +{ + gcc_unreachable (); +} + +rtx +default_function_incoming_arg (CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED, + enum machine_mode mode ATTRIBUTE_UNUSED, + const_tree type ATTRIBUTE_UNUSED, + bool named ATTRIBUTE_UNUSED) +{ + gcc_unreachable (); +} + +unsigned int +default_function_arg_boundary (enum machine_mode mode ATTRIBUTE_UNUSED, + const_tree type ATTRIBUTE_UNUSED) +{ + return PARM_BOUNDARY; +} + +void hook_void_bitmap (bitmap regs ATTRIBUTE_UNUSED) { } const char * hook_invalid_arg_for_unprototyped_fn ( - tree typelist ATTRIBUTE_UNUSED, - tree funcdecl ATTRIBUTE_UNUSED, - tree val ATTRIBUTE_UNUSED) + const_tree typelist ATTRIBUTE_UNUSED, + const_tree funcdecl ATTRIBUTE_UNUSED, + const_tree val ATTRIBUTE_UNUSED) { return NULL; } @@ -381,7 +640,10 @@ default_stack_protect_guard (void) if (t == NULL) { - t = build_decl (VAR_DECL, get_identifier ("__stack_chk_guard"), + rtx x; + + t = build_decl (UNKNOWN_LOCATION, + VAR_DECL, get_identifier ("__stack_chk_guard"), ptr_type_node); TREE_STATIC (t) = 1; TREE_PUBLIC (t) = 1; @@ -391,6 +653,11 @@ default_stack_protect_guard (void) DECL_ARTIFICIAL (t) = 1; DECL_IGNORED_P (t) = 1; + /* Do not share RTL as the declaration is visible outside of + current function. */ + x = DECL_RTL (t); + RTX_FLAG (x, used) = 1; + stack_chk_guard_decl = t; } @@ -399,7 +666,7 @@ default_stack_protect_guard (void) static GTY(()) tree stack_chk_fail_decl; -tree +tree default_external_stack_protect_fail (void) { tree t = stack_chk_fail_decl; @@ -407,7 +674,8 @@ default_external_stack_protect_fail (void) if (t == NULL_TREE) { t = build_function_type_list (void_type_node, NULL_TREE); - t = build_decl (FUNCTION_DECL, get_identifier ("__stack_chk_fail"), t); + t = build_decl (UNKNOWN_LOCATION, + FUNCTION_DECL, get_identifier ("__stack_chk_fail"), t); TREE_STATIC (t) = 1; TREE_PUBLIC (t) = 1; DECL_EXTERNAL (t) = 1; @@ -422,7 +690,7 @@ default_external_stack_protect_fail (void) stack_chk_fail_decl = t; } - return build_function_call_expr (t, NULL_TREE); + return build_call_expr (t, 0); } tree @@ -439,7 +707,7 @@ default_hidden_stack_protect_fail (void) if (t == NULL_TREE) { t = build_function_type_list (void_type_node, NULL_TREE); - t = build_decl (FUNCTION_DECL, + t = build_decl (UNKNOWN_LOCATION, FUNCTION_DECL, get_identifier ("__stack_chk_fail_local"), t); TREE_STATIC (t) = 1; TREE_PUBLIC (t) = 1; @@ -455,19 +723,20 @@ default_hidden_stack_protect_fail (void) stack_chk_fail_decl = t; } - return build_function_call_expr (t, NULL_TREE); + return build_call_expr (t, 0); #endif } bool -hook_bool_rtx_commutative_p (rtx x, int outer_code ATTRIBUTE_UNUSED) +hook_bool_const_rtx_commutative_p (const_rtx x, + int outer_code ATTRIBUTE_UNUSED) { return COMMUTATIVE_P (x); } rtx -default_function_value (tree ret_type ATTRIBUTE_UNUSED, - tree fn_decl_or_type, +default_function_value (const_tree ret_type ATTRIBUTE_UNUSED, + const_tree fn_decl_or_type, bool outgoing ATTRIBUTE_UNUSED) { /* The old interface doesn't handle receiving the function type. */ @@ -475,15 +744,33 @@ default_function_value (tree ret_type ATTRIBUTE_UNUSED, && !DECL_P (fn_decl_or_type)) fn_decl_or_type = NULL; -#ifdef FUNCTION_OUTGOING_VALUE - if (outgoing) - return FUNCTION_OUTGOING_VALUE (ret_type, fn_decl_or_type); -#endif - #ifdef FUNCTION_VALUE return FUNCTION_VALUE (ret_type, fn_decl_or_type); #else - return NULL_RTX; + gcc_unreachable (); +#endif +} + +rtx +default_libcall_value (enum machine_mode mode ATTRIBUTE_UNUSED, + const_rtx fun ATTRIBUTE_UNUSED) +{ +#ifdef LIBCALL_VALUE + return LIBCALL_VALUE (mode); +#else + gcc_unreachable (); +#endif +} + +/* The default hook for TARGET_FUNCTION_VALUE_REGNO_P. */ + +bool +default_function_value_regno_p (const unsigned int regno ATTRIBUTE_UNUSED) +{ +#ifdef FUNCTION_VALUE_REGNO_P + return FUNCTION_VALUE_REGNO_P (regno); +#else + gcc_unreachable (); #endif } @@ -502,13 +789,66 @@ default_internal_arg_pointer (void) return virtual_incoming_args_rtx; } -enum reg_class +rtx +default_static_chain (const_tree fndecl, bool incoming_p) +{ + if (!DECL_STATIC_CHAIN (fndecl)) + return NULL; + + if (incoming_p) + { +#ifdef STATIC_CHAIN_INCOMING_REGNUM + return gen_rtx_REG (Pmode, STATIC_CHAIN_INCOMING_REGNUM); +#endif + } + +#ifdef STATIC_CHAIN_REGNUM + return gen_rtx_REG (Pmode, STATIC_CHAIN_REGNUM); +#endif + + { + static bool issued_error; + if (!issued_error) + { + issued_error = true; + sorry ("nested functions not supported on this target"); + } + + /* It really doesn't matter what we return here, so long at it + doesn't cause the rest of the compiler to crash. */ + return gen_rtx_MEM (Pmode, stack_pointer_rtx); + } +} + +void +default_trampoline_init (rtx ARG_UNUSED (m_tramp), tree ARG_UNUSED (t_func), + rtx ARG_UNUSED (r_chain)) +{ + sorry ("nested function trampolines not supported on this target"); +} + +int +default_return_pops_args (tree fundecl ATTRIBUTE_UNUSED, + tree funtype ATTRIBUTE_UNUSED, + int size ATTRIBUTE_UNUSED) +{ + return 0; +} + +reg_class_t +default_branch_target_register_class (void) +{ + return NO_REGS; +} + +reg_class_t default_secondary_reload (bool in_p ATTRIBUTE_UNUSED, rtx x ATTRIBUTE_UNUSED, - enum reg_class reload_class ATTRIBUTE_UNUSED, + reg_class_t reload_class_i ATTRIBUTE_UNUSED, enum machine_mode reload_mode ATTRIBUTE_UNUSED, secondary_reload_info *sri) { - enum reg_class class = NO_REGS; + enum reg_class rclass = NO_REGS; + enum reg_class reload_class = (enum reg_class) reload_class_i; if (sri->prev_sri && sri->prev_sri->t_icode != CODE_FOR_nothing) { @@ -517,20 +857,20 @@ default_secondary_reload (bool in_p ATTRIBUTE_UNUSED, rtx x ATTRIBUTE_UNUSED, } #ifdef SECONDARY_INPUT_RELOAD_CLASS if (in_p) - class = SECONDARY_INPUT_RELOAD_CLASS (reload_class, reload_mode, x); + rclass = SECONDARY_INPUT_RELOAD_CLASS (reload_class, reload_mode, x); #endif #ifdef SECONDARY_OUTPUT_RELOAD_CLASS if (! in_p) - class = SECONDARY_OUTPUT_RELOAD_CLASS (reload_class, reload_mode, x); + rclass = SECONDARY_OUTPUT_RELOAD_CLASS (reload_class, reload_mode, x); #endif - if (class != NO_REGS) + if (rclass != NO_REGS) { - enum insn_code icode = (in_p ? reload_in_optab[(int) reload_mode] - : reload_out_optab[(int) reload_mode]); + enum insn_code icode + = direct_optab_handler (in_p ? reload_in_optab : reload_out_optab, + reload_mode); if (icode != CODE_FOR_nothing - && insn_data[(int) icode].operand[in_p].predicate - && ! insn_data[(int) icode].operand[in_p].predicate (x, reload_mode)) + && !insn_operand_matches (icode, in_p, x)) icode = CODE_FOR_nothing; else if (icode != CODE_FOR_nothing) { @@ -575,33 +915,588 @@ default_secondary_reload (bool in_p ATTRIBUTE_UNUSED, rtx x ATTRIBUTE_UNUSED, if (reg_class_subset_p (reload_class, insn_class)) { - gcc_assert (scratch_class == class); - class = NO_REGS; + gcc_assert (scratch_class == rclass); + rclass = NO_REGS; } else - class = insn_class; + rclass = insn_class; } - if (class == NO_REGS) + if (rclass == NO_REGS) sri->icode = icode; else sri->t_icode = icode; } - return class; + return rclass; +} + +/* By default, if flag_pic is true, then neither local nor global relocs + should be placed in readonly memory. */ + +int +default_reloc_rw_mask (void) +{ + return flag_pic ? 3 : 0; +} + +/* By default, do no modification. */ +tree default_mangle_decl_assembler_name (tree decl ATTRIBUTE_UNUSED, + tree id) +{ + return id; +} + +bool +default_builtin_vector_alignment_reachable (const_tree type, bool is_packed) +{ + if (is_packed) + return false; + + /* Assuming that types whose size is > pointer-size are not guaranteed to be + naturally aligned. */ + if (tree_int_cst_compare (TYPE_SIZE (type), bitsize_int (POINTER_SIZE)) > 0) + return false; + + /* Assuming that types whose size is <= pointer-size + are naturally aligned. */ + return true; +} + +/* By default, assume that a target supports any factor of misalignment + memory access if it supports movmisalign patten. + is_packed is true if the memory access is defined in a packed struct. */ +bool +default_builtin_support_vector_misalignment (enum machine_mode mode, + const_tree type + ATTRIBUTE_UNUSED, + int misalignment + ATTRIBUTE_UNUSED, + bool is_packed + ATTRIBUTE_UNUSED) +{ + if (optab_handler (movmisalign_optab, mode) != CODE_FOR_nothing) + return true; + return false; +} + +/* By default, only attempt to parallelize bitwise operations, and + possibly adds/subtracts using bit-twiddling. */ + +enum machine_mode +default_preferred_simd_mode (enum machine_mode mode ATTRIBUTE_UNUSED) +{ + return word_mode; +} + +/* By default only the size derived from the preferred vector mode + is tried. */ + +unsigned int +default_autovectorize_vector_sizes (void) +{ + return 0; +} + +/* Determine whether or not a pointer mode is valid. Assume defaults + of ptr_mode or Pmode - can be overridden. */ +bool +default_valid_pointer_mode (enum machine_mode mode) +{ + return (mode == ptr_mode || mode == Pmode); +} + +/* Determine whether the memory reference specified by REF may alias + the C libraries errno location. */ +bool +default_ref_may_alias_errno (ao_ref *ref) +{ + tree base = ao_ref_base (ref); + /* The default implementation assumes the errno location is + a declaration of type int or is always accessed via a + pointer to int. We assume that accesses to errno are + not deliberately obfuscated (even in conforming ways). */ + if (TYPE_UNSIGNED (TREE_TYPE (base)) + || TYPE_MODE (TREE_TYPE (base)) != TYPE_MODE (integer_type_node)) + return false; + /* The default implementation assumes an errno location + declaration is never defined in the current compilation unit. */ + if (DECL_P (base) + && !TREE_STATIC (base)) + return true; + else if (TREE_CODE (base) == MEM_REF + && TREE_CODE (TREE_OPERAND (base, 0)) == SSA_NAME) + { + struct ptr_info_def *pi = SSA_NAME_PTR_INFO (TREE_OPERAND (base, 0)); + return !pi || pi->pt.anything || pi->pt.nonlocal; + } + return false; +} + +/* Return the mode for a pointer to a given ADDRSPACE, defaulting to ptr_mode + for the generic address space only. */ + +enum machine_mode +default_addr_space_pointer_mode (addr_space_t addrspace ATTRIBUTE_UNUSED) +{ + gcc_assert (ADDR_SPACE_GENERIC_P (addrspace)); + return ptr_mode; +} + +/* Return the mode for an address in a given ADDRSPACE, defaulting to Pmode + for the generic address space only. */ + +enum machine_mode +default_addr_space_address_mode (addr_space_t addrspace ATTRIBUTE_UNUSED) +{ + gcc_assert (ADDR_SPACE_GENERIC_P (addrspace)); + return Pmode; +} + +/* Named address space version of valid_pointer_mode. */ + +bool +default_addr_space_valid_pointer_mode (enum machine_mode mode, addr_space_t as) +{ + if (!ADDR_SPACE_GENERIC_P (as)) + return (mode == targetm.addr_space.pointer_mode (as) + || mode == targetm.addr_space.address_mode (as)); + + return targetm.valid_pointer_mode (mode); +} + +/* 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. */ + +bool +target_default_pointer_address_modes_p (void) +{ + if (targetm.addr_space.address_mode != default_addr_space_address_mode) + return false; + if (targetm.addr_space.pointer_mode != default_addr_space_pointer_mode) + return false; + + return true; +} + +/* Named address space version of legitimate_address_p. */ + +bool +default_addr_space_legitimate_address_p (enum machine_mode mode, rtx mem, + bool strict, addr_space_t as) +{ + if (!ADDR_SPACE_GENERIC_P (as)) + gcc_unreachable (); + + return targetm.legitimate_address_p (mode, mem, strict); +} + +/* Named address space version of LEGITIMIZE_ADDRESS. */ + +rtx +default_addr_space_legitimize_address (rtx x, rtx oldx, + enum machine_mode mode, addr_space_t as) +{ + if (!ADDR_SPACE_GENERIC_P (as)) + return x; + + return targetm.legitimize_address (x, oldx, mode); +} + +/* The default hook for determining if one named address space is a subset of + another and to return which address space to use as the common address + space. */ + +bool +default_addr_space_subset_p (addr_space_t subset, addr_space_t superset) +{ + return (subset == superset); +} + +/* The default hook for TARGET_ADDR_SPACE_CONVERT. This hook should never be + called for targets with only a generic address space. */ + +rtx +default_addr_space_convert (rtx op ATTRIBUTE_UNUSED, + tree from_type ATTRIBUTE_UNUSED, + tree to_type ATTRIBUTE_UNUSED) +{ + gcc_unreachable (); +} + +bool +default_hard_regno_scratch_ok (unsigned int regno ATTRIBUTE_UNUSED) +{ + return true; +} + +/* The default implementation of TARGET_MODE_DEPENDENT_ADDRESS_P. */ + +bool +default_mode_dependent_address_p (const_rtx addr ATTRIBUTE_UNUSED) +{ +#ifdef GO_IF_MODE_DEPENDENT_ADDRESS + + GO_IF_MODE_DEPENDENT_ADDRESS (CONST_CAST_RTX (addr), win); + return false; + /* Label `win' might (not) be used via GO_IF_MODE_DEPENDENT_ADDRESS. */ + win: ATTRIBUTE_UNUSED_LABEL + return true; + +#else + + return false; + +#endif +} + +bool +default_target_option_valid_attribute_p (tree ARG_UNUSED (fndecl), + tree ARG_UNUSED (name), + tree ARG_UNUSED (args), + int ARG_UNUSED (flags)) +{ + warning (OPT_Wattributes, + "target attribute is not supported on this machine"); + + return false; +} + +bool +default_target_option_pragma_parse (tree ARG_UNUSED (args), + tree ARG_UNUSED (pop_target)) +{ + warning (OPT_Wpragmas, + "#pragma GCC target is not supported for this machine"); + + return false; +} + +bool +default_target_can_inline_p (tree caller, tree callee) +{ + bool ret = false; + tree callee_opts = DECL_FUNCTION_SPECIFIC_TARGET (callee); + tree caller_opts = DECL_FUNCTION_SPECIFIC_TARGET (caller); + + /* If callee has no option attributes, then it is ok to inline */ + if (!callee_opts) + ret = true; + + /* If caller has no option attributes, but callee does then it is not ok to + inline */ + else if (!caller_opts) + ret = false; + + /* If both caller and callee have attributes, assume that if the + pointer is different, the two functions have different target + options since build_target_option_node uses a hash table for the + options. */ + else + ret = (callee_opts == caller_opts); + + return ret; +} + +#ifndef HAVE_casesi +# define HAVE_casesi 0 +#endif + +/* If the machine does not have a case insn that compares the bounds, + this means extra overhead for dispatch tables, which raises the + threshold for using them. */ + +unsigned int default_case_values_threshold (void) +{ + return (HAVE_casesi ? 4 : 5); +} + +bool +default_have_conditional_execution (void) +{ +#ifdef HAVE_conditional_execution + return HAVE_conditional_execution; +#else + return false; +#endif +} + +/* Compute cost of moving registers to/from memory. */ + +int +default_memory_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED, + reg_class_t rclass ATTRIBUTE_UNUSED, + bool in ATTRIBUTE_UNUSED) +{ +#ifndef MEMORY_MOVE_COST + return (4 + memory_move_secondary_cost (mode, (enum reg_class) rclass, in)); +#else + return MEMORY_MOVE_COST (mode, (enum reg_class) rclass, in); +#endif +} + +/* Compute cost of moving data from a register of class FROM to one of + TO, using MODE. */ + +int +default_register_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED, + reg_class_t from ATTRIBUTE_UNUSED, + reg_class_t to ATTRIBUTE_UNUSED) +{ +#ifndef REGISTER_MOVE_COST + return 2; +#else + return REGISTER_MOVE_COST (mode, (enum reg_class) from, (enum reg_class) to); +#endif +} + +bool +default_profile_before_prologue (void) +{ +#ifdef PROFILE_BEFORE_PROLOGUE + return true; +#else + return false; +#endif +} + +/* The default implementation of TARGET_PREFERRED_RELOAD_CLASS. */ + +reg_class_t +default_preferred_reload_class (rtx x ATTRIBUTE_UNUSED, + reg_class_t rclass) +{ +#ifdef PREFERRED_RELOAD_CLASS + return (reg_class_t) PREFERRED_RELOAD_CLASS (x, (enum reg_class) rclass); +#else + return rclass; +#endif +} + +/* The default implementation of TARGET_OUTPUT_PREFERRED_RELOAD_CLASS. */ + +reg_class_t +default_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED, + reg_class_t rclass) +{ +#ifdef PREFERRED_OUTPUT_RELOAD_CLASS + return PREFERRED_OUTPUT_RELOAD_CLASS (x, (enum reg_class) rclass); +#else + return rclass; +#endif +} + +/* The default implementation of TARGET_PREFERRED_RENAME_CLASS. */ +reg_class_t +default_preferred_rename_class (reg_class_t rclass ATTRIBUTE_UNUSED) +{ + return NO_REGS; +} + +/* The default implementation of TARGET_CLASS_LIKELY_SPILLED_P. */ + +bool +default_class_likely_spilled_p (reg_class_t rclass) +{ + return (reg_class_size[(int) rclass] == 1); +} + +/* Determine the debugging unwind mechanism for the target. */ + +enum unwind_info_type +default_debug_unwind_info (void) +{ + /* If the target wants to force the use of dwarf2 unwind info, let it. */ + /* ??? Change all users to the hook, then poison this. */ +#ifdef DWARF2_FRAME_INFO + if (DWARF2_FRAME_INFO) + return UI_DWARF2; +#endif + + /* Otherwise, only turn it on if dwarf2 debugging is enabled. */ +#ifdef DWARF2_DEBUGGING_INFO + if (write_symbols == DWARF2_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG) + return UI_DWARF2; +#endif + + return UI_NONE; +} + +/* Determine the exception handling mechanism for the target. */ + +enum unwind_info_type +default_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED) +{ + /* Obey the configure switch to turn on sjlj exceptions. */ +#ifdef CONFIG_SJLJ_EXCEPTIONS + if (CONFIG_SJLJ_EXCEPTIONS) + return UI_SJLJ; +#endif + + /* ??? Change all users to the hook, then poison this. */ +#ifdef DWARF2_UNWIND_INFO + if (DWARF2_UNWIND_INFO) + return UI_DWARF2; +#endif + + return UI_SJLJ; +} + +/* To be used by targets that force dwarf2 unwind enabled. */ + +enum unwind_info_type +dwarf2_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED) +{ + /* Obey the configure switch to turn on sjlj exceptions. */ +#ifdef CONFIG_SJLJ_EXCEPTIONS + if (CONFIG_SJLJ_EXCEPTIONS) + return UI_SJLJ; +#endif + + return UI_DWARF2; +} + +/* To be used by targets that force sjlj unwind enabled. */ + +enum unwind_info_type +sjlj_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED) +{ + return UI_SJLJ; +} + +/* To be used by targets where reg_raw_mode doesn't return the right + mode for registers used in apply_builtin_return and apply_builtin_arg. */ + +enum machine_mode +default_get_reg_raw_mode(int regno) +{ + return reg_raw_mode[regno]; +} + +/* Return true if the state of option OPTION should be stored in PCH files + and checked by default_pch_valid_p. Store the option's current state + in STATE if so. */ + +static inline bool +option_affects_pch_p (int option, struct cl_option_state *state) +{ + if ((cl_options[option].flags & CL_TARGET) == 0) + return false; + if (option_flag_var (option, &global_options) == &target_flags) + if (targetm.check_pch_target_flags) + return false; + return get_option_state (&global_options, option, state); +} + +/* Default version of get_pch_validity. + By default, every flag difference is fatal; that will be mostly right for + most targets, but completely right for very few. */ + +void * +default_get_pch_validity (size_t *sz) +{ + struct cl_option_state state; + size_t i; + char *result, *r; + + *sz = 2; + if (targetm.check_pch_target_flags) + *sz += sizeof (target_flags); + for (i = 0; i < cl_options_count; i++) + if (option_affects_pch_p (i, &state)) + *sz += state.size; + + result = r = XNEWVEC (char, *sz); + r[0] = flag_pic; + r[1] = flag_pie; + r += 2; + if (targetm.check_pch_target_flags) + { + memcpy (r, &target_flags, sizeof (target_flags)); + r += sizeof (target_flags); + } + + for (i = 0; i < cl_options_count; i++) + if (option_affects_pch_p (i, &state)) + { + memcpy (r, state.data, state.size); + r += state.size; + } + + return result; +} + +/* Return a message which says that a PCH file was created with a different + setting of OPTION. */ + +static const char * +pch_option_mismatch (const char *option) +{ + char *r; + + asprintf (&r, _("created and used with differing settings of '%s'"), option); + if (r == NULL) + return _("out of memory"); + return r; } +/* Default version of pch_valid_p. */ + +const char * +default_pch_valid_p (const void *data_p, size_t len) +{ + struct cl_option_state state; + const char *data = (const char *)data_p; + size_t i; + + /* -fpic and -fpie also usually make a PCH invalid. */ + if (data[0] != flag_pic) + return _("created and used with different settings of -fpic"); + if (data[1] != flag_pie) + return _("created and used with different settings of -fpie"); + data += 2; + + /* Check target_flags. */ + if (targetm.check_pch_target_flags) + { + int tf; + const char *r; + + memcpy (&tf, data, sizeof (target_flags)); + data += sizeof (target_flags); + len -= sizeof (target_flags); + r = targetm.check_pch_target_flags (tf); + if (r != NULL) + return r; + } -/* If STRICT_ALIGNMENT is true we use the container type for accessing - volatile bitfields. This is generally the preferred behavior for memory - mapped peripherals on RISC architectures. - If STRICT_ALIGNMENT is false we use the narrowest type possible. This - is typically used to avoid spurious page faults and extra memory accesses - due to unaligned accesses on CISC architectures. */ + for (i = 0; i < cl_options_count; i++) + if (option_affects_pch_p (i, &state)) + { + if (memcmp (data, state.data, state.size) != 0) + return pch_option_mismatch (cl_options[i].opt_text); + data += state.size; + len -= state.size; + } + + return NULL; +} + +/* Default version of TARGET_HANDLE_OPTION. */ bool -default_narrow_bitfield (void) +default_target_handle_option (struct gcc_options *opts ATTRIBUTE_UNUSED, + struct gcc_options *opts_set ATTRIBUTE_UNUSED, + const struct cl_decoded_option *decoded ATTRIBUTE_UNUSED, + location_t loc ATTRIBUTE_UNUSED) { - return !STRICT_ALIGNMENT; + return true; } +const struct default_options empty_optimization_table[] = + { + { OPT_LEVELS_NONE, 0, NULL, 0 } + }; + #include "gt-targhooks.h"