/* Default target hook functions.
- Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010
+ Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
This file is part of GCC.
#include "expr.h"
#include "output.h"
#include "diagnostic-core.h"
-#include "toplev.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
#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
}
}
+/* 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
const_tree type ATTRIBUTE_UNUSED,
bool named ATTRIBUTE_UNUSED)
{
-#ifdef FUNCTION_ARG_ADVANCE
- CUMULATIVE_ARGS args = *ca;
- FUNCTION_ARG_ADVANCE (args, mode, CONST_CAST_TREE (type), named);
- *ca = args;
-#else
gcc_unreachable ();
-#endif
}
rtx
const_tree type ATTRIBUTE_UNUSED,
bool named ATTRIBUTE_UNUSED)
{
-#ifdef FUNCTION_ARG
- return FUNCTION_ARG (*ca, mode, CONST_CAST_TREE (type), named);
-#else
gcc_unreachable ();
-#endif
}
rtx
const_tree type ATTRIBUTE_UNUSED,
bool named ATTRIBUTE_UNUSED)
{
-#ifdef FUNCTION_INCOMING_ARG
- return FUNCTION_INCOMING_ARG (*ca, mode, CONST_CAST_TREE (type), named);
-#else
gcc_unreachable ();
-#endif
+}
+
+unsigned int
+default_function_arg_boundary (enum machine_mode mode ATTRIBUTE_UNUSED,
+ const_tree type ATTRIBUTE_UNUSED)
+{
+ return PARM_BOUNDARY;
}
void
return NO_REGS;
}
-#ifdef IRA_COVER_CLASSES
-const reg_class_t *
-default_ira_cover_classes (void)
-{
- static reg_class_t classes[] = IRA_COVER_CLASSES;
- return classes;
-}
-#endif
-
reg_class_t
default_secondary_reload (bool in_p ATTRIBUTE_UNUSED, rtx x ATTRIBUTE_UNUSED,
reg_class_t reload_class_i ATTRIBUTE_UNUSED,
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)
{
return rclass;
}
-bool
-default_handle_c_option (size_t code ATTRIBUTE_UNUSED,
- const char *arg ATTRIBUTE_UNUSED,
- int value ATTRIBUTE_UNUSED)
-{
- return false;
-}
-
/* By default, if flag_pic is true, then neither local nor global relocs
should be placed in readonly memory. */
/* 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_units_per_simd_word (enum machine_mode mode ATTRIBUTE_UNUSED)
+default_autovectorize_vector_sizes (void)
{
- return UNITS_PER_WORD;
+ return 0;
}
/* Determine whether or not a pointer mode is valid. Assume defaults
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. */
else if (!caller_opts)
ret = false;
- /* If both caller and callee have attributes, assume that if the pointer is
- different, the the two functions have different target options since
- build_target_option_node uses a hash table for the options. */
+ /* 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);
#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)
{
-#ifndef CLASS_LIKELY_SPILLED_P
return (reg_class_size[(int) rclass] == 1);
-#else
- return CLASS_LIKELY_SPILLED_P ((enum reg_class) rclass);
+}
+
+/* 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;
+ }
+
+ 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_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 true;
+}
+
+const struct default_options empty_optimization_table[] =
+ {
+ { OPT_LEVELS_NONE, 0, NULL, 0 }
+ };
+
#include "gt-targhooks.h"
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