@@ -545,7 +545,7 @@ riscv*)
extra_objs="riscv-builtins.o riscv-c.o riscv-sr.o riscv-shorten-memrefs.o riscv-selftests.o riscv-string.o"
extra_objs="${extra_objs} riscv-v.o riscv-vsetvl.o riscv-vector-costs.o"
extra_objs="${extra_objs} riscv-vector-builtins.o riscv-vector-builtins-shapes.o riscv-vector-builtins-bases.o"
- extra_objs="${extra_objs} thead.o"
+ extra_objs="${extra_objs} thead.o riscv-target-attr.o"
d_target_objs="riscv-d.o"
extra_headers="riscv_vector.h"
target_gtfiles="$target_gtfiles \$(srcdir)/config/riscv/riscv-vector-builtins.cc"
@@ -112,6 +112,12 @@ enum riscv_entity
? 0 \
: 32 << (__builtin_popcount (riscv_zvl_flags) - 1))
+/* Same as TARGET_MIN_VLEN, but take an OPTS as gcc_options. */
+#define TARGET_MIN_VLEN_OPTS(opts) \
+ ((opts->x_riscv_zvl_flags == 0) \
+ ? 0 \
+ : 32 << (__builtin_popcount (opts->x_riscv_zvl_flags) - 1))
+
/* We only enable VLS modes for VLA vectorization since fixed length VLMAX mode
is the highest priority choice and should not conflict with VLS modes. */
#define TARGET_VECTOR_VLS \
@@ -103,6 +103,7 @@ extern void riscv_split_doubleword_move (rtx, rtx);
extern const char *riscv_output_move (rtx, rtx);
extern const char *riscv_output_return ();
extern void riscv_declare_function_name (FILE *, const char *, tree);
+extern void riscv_declare_function_size (FILE *, const char *, tree);
extern void riscv_asm_output_alias (FILE *, const tree, const tree);
extern void riscv_asm_output_external (FILE *, const tree, const char *);
extern bool
@@ -579,5 +580,25 @@ th_mempair_output_move (rtx[4], bool, machine_mode, RTX_CODE);
extern bool riscv_use_divmod_expander (void);
void riscv_init_cumulative_args (CUMULATIVE_ARGS *, tree, rtx, tree, int);
+extern bool
+riscv_option_valid_attribute_p (tree, tree, tree, int);
+extern void
+riscv_override_options_internal (struct gcc_options *);
+
+struct riscv_tune_param;
+/* Information about one micro-arch we know about. */
+struct riscv_tune_info {
+ /* This micro-arch canonical name. */
+ const char *name;
+
+ /* Which automaton to use for tuning. */
+ enum riscv_microarchitecture_type microarchitecture;
+
+ /* Tuning parameters for this micro-arch. */
+ const struct riscv_tune_param *tune_param;
+};
+
+const struct riscv_tune_info *
+riscv_parse_tune (const char *, bool);
#endif /* ! GCC_RISCV_PROTOS_H */
new file mode 100644
@@ -0,0 +1,395 @@
+/* Subroutines used for parsing target attribute for RISC-V.
+ Copyright (C) 2023 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 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or 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 COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#define IN_TARGET_CODE 1
+
+#define INCLUDE_STRING
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "target.h"
+#include "tree.h"
+#include "tm_p.h"
+#include "diagnostic.h"
+#include "opts.h"
+#include "riscv-subset.h"
+
+namespace {
+class riscv_target_attr_parser
+{
+public:
+ riscv_target_attr_parser (location_t loc)
+ : m_found_arch_p (false)
+ , m_found_tune_p (false)
+ , m_found_cpu_p (false)
+ , m_subset_list (nullptr)
+ , m_loc (loc)
+ , m_cpu_info (nullptr)
+ , m_tune (nullptr)
+ {
+ }
+
+ bool handle_arch (const char *);
+ bool handle_cpu (const char *);
+ bool handle_tune (const char *);
+
+ void set_loc (location_t loc) {
+ m_loc = loc;
+ }
+
+ void update_settings (struct gcc_options *opts) const;
+private:
+ const char *m_raw_attr_str;
+ bool parse_arch (const char *);
+
+ bool m_found_arch_p;
+ bool m_found_tune_p;
+ bool m_found_cpu_p;
+ riscv_subset_list *m_subset_list;
+ location_t m_loc;
+ const riscv_cpu_info *m_cpu_info;
+ const char *m_tune;
+};
+}
+
+/* All the information needed to handle a target attribute.
+ NAME is the name of the attribute.
+ HANDLER is the function that takes the attribute string as an argument. */
+
+struct riscv_attribute_info
+{
+ const char *name;
+ bool (riscv_target_attr_parser::*handler) (const char *);
+};
+
+/* The target attributes that we support. */
+
+static const struct riscv_attribute_info riscv_attributes[]
+ = {{"arch", &riscv_target_attr_parser::handle_arch},
+ {"cpu", &riscv_target_attr_parser::handle_cpu},
+ {"tune", &riscv_target_attr_parser::handle_tune}};
+
+bool
+riscv_target_attr_parser::parse_arch (const char *str)
+{
+ if (m_subset_list)
+ delete m_subset_list;
+ /* Check if it's setting full arch string. */
+ if (strncmp ("rv", str, strlen ("rv")) == 0)
+ {
+ m_subset_list = riscv_subset_list::parse (str, location_t ());
+
+ if (m_subset_list == nullptr)
+ goto fail;
+
+ return true;
+ }
+ else
+ {
+ /* Parsing the extension list like "+<ext>[,+<ext>]*". */
+ size_t len = strlen (str);
+ char *str_to_check = (char *) alloca (len + 1);
+ strcpy (str_to_check, str);
+ const char *token = strtok_r (str_to_check, ",", &str_to_check);
+ m_subset_list = riscv_current_subset_list ()->clone ();
+ m_subset_list->set_loc (m_loc);
+ while (token)
+ {
+ if (token[0] != '+')
+ {
+ error_at (
+ m_loc,
+ "unexpected arch for %<target()%> attribute: must start "
+ "with + or rv");
+ goto fail;
+ }
+ else
+ {
+ const char *result = m_subset_list->parse_single_ext (token + 1);
+ /* Check parse_single_ext has consume all string. */
+ if (*result != '\0')
+ {
+ error_at (
+ m_loc,
+ "unexpected arch for %<target()%> attribute: bad "
+ "string found %<%s%>", token);
+ goto fail;
+ }
+ }
+ token = strtok_r (NULL, ",", &str_to_check);
+ }
+
+ return true;
+ }
+fail:
+ if (m_subset_list != nullptr)
+ {
+ delete m_subset_list;
+ m_subset_list = nullptr;
+ }
+ return false;
+}
+
+/* Handle the ARCH_STR argument to the arch= target attribute. */
+
+bool
+riscv_target_attr_parser::handle_arch (const char *str)
+{
+ if (m_found_arch_p)
+ warning_at (m_loc, 0,
+ "%<target()%> attribute: arch appears more than once, the "
+ "settings of the last one will be used");
+ m_found_arch_p = true;
+ return parse_arch (str);
+}
+
+/* Handle the CPU_STR argument to the cpu= target attribute. */
+
+bool
+riscv_target_attr_parser::handle_cpu (const char *str)
+{
+ if (m_found_cpu_p)
+ warning_at (m_loc, 0,
+ "%<target()%> attribute: cpu appears more than once, the "
+ "settings of the last one will be used");
+
+ m_found_cpu_p = true;
+ const riscv_cpu_info *cpu_info = riscv_find_cpu (str);
+
+ if (!cpu_info)
+ {
+ error_at (m_loc, "%<target()%> attribute: unknown CPU %qs", str);
+ return false;
+ }
+
+ if (m_subset_list == nullptr)
+ {
+ const char *arch_str = cpu_info->arch;
+ m_subset_list = riscv_subset_list::parse (arch_str, m_loc);
+ gcc_assert (m_subset_list);
+ }
+
+ m_cpu_info = cpu_info;
+ return true;
+}
+
+/* Handle the TUNE_STR argument to the tune= target attribute. */
+
+bool
+riscv_target_attr_parser::handle_tune (const char *str)
+{
+ if (m_found_tune_p)
+ warning_at (m_loc, 0,
+ "%<target()%> attribute: tune appears more than once, the "
+ "settings of the last one will be used");
+ m_found_tune_p = true;
+ const struct riscv_tune_info *tune = riscv_parse_tune (str, true);
+
+ if (tune == nullptr)
+ {
+ error_at (m_loc, "%<target()%> attribute: unknown TUNE %qs", str);
+ return false;
+ }
+
+ m_tune = tune->name;
+
+ return true;
+}
+
+void
+riscv_target_attr_parser::update_settings (struct gcc_options *opts) const
+{
+ if (m_subset_list)
+ riscv_set_arch_by_subset_list (m_subset_list, opts);
+
+ if (m_cpu_info)
+ opts->x_riscv_cpu_string = m_cpu_info->name;
+
+ if (m_tune)
+ opts->x_riscv_tune_string = m_tune;
+ else
+ {
+ if (m_cpu_info)
+ opts->x_riscv_tune_string = m_cpu_info->tune;
+ }
+}
+
+/* Parse ARG_STR which contains the definition of one target attribute.
+ Show appropriate errors if any or return true if the attribute is valid. */
+
+static bool
+riscv_process_one_target_attr (char *arg_str,
+ location_t loc,
+ riscv_target_attr_parser &attr_parser)
+{
+ size_t len = strlen (arg_str);
+
+ if (len == 0)
+ {
+ error_at (loc, "malformed %<target()%> attribute");
+ return false;
+ }
+
+ char *str_to_check = (char *) alloca (len + 1);
+ strcpy (str_to_check, arg_str);
+
+ char *arg = strchr (str_to_check, '=');
+
+ if (!arg)
+ {
+ error_at (
+ loc,
+ "attribute %<target(\"%s\")%> does not accept an argument",
+ str_to_check);
+ return false;
+ }
+
+ arg[0] = '\0';
+ ++arg;
+ for (const auto &attr : riscv_attributes)
+ {
+ /* If the names don't match up, or the user has given an argument
+ to an attribute that doesn't accept one, or didn't give an argument
+ to an attribute that expects one, fail to match. */
+ if (strncmp (str_to_check, attr.name, strlen (attr.name)) != 0)
+ continue;
+
+ return (&attr_parser->*attr.handler) (arg);
+ }
+ error_at (loc, "Got unknown attribute %<target(\"%s\")%>", str_to_check);
+
+ return false;
+}
+
+/* Count how many times the character C appears in
+ NULL-terminated string STR. */
+
+static unsigned int
+num_occurences_in_str (char c, char *str)
+{
+ unsigned int res = 0;
+ while (*str != '\0')
+ {
+ if (*str == c)
+ res++;
+
+ str++;
+ }
+
+ return res;
+}
+
+/* Parse the tree in ARGS that contains the target attribute information
+ and update the global target options space. */
+
+static bool
+riscv_process_target_attr (tree args, location_t loc, struct gcc_options *opts)
+{
+ if (TREE_CODE (args) == TREE_LIST)
+ {
+ do
+ {
+ tree head = TREE_VALUE (args);
+ if (head)
+ {
+ if (!riscv_process_target_attr (head, loc, opts))
+ return false;
+ }
+ args = TREE_CHAIN (args);
+ } while (args);
+
+ return true;
+ }
+
+ if (TREE_CODE (args) != STRING_CST)
+ {
+ error_at (loc, "attribute %<target%> argument not a string");
+ return false;
+ }
+ size_t len = strlen (TREE_STRING_POINTER (args));
+ char *str_to_check = (char *) alloca (len + 1);
+ strcpy (str_to_check, TREE_STRING_POINTER (args));
+
+ /* No need to emit warning or error on empty string here, generic code already
+ handle this case. */
+ if (len == 0)
+ return false;
+
+ /* Used to catch empty spaces between commas i.e.
+ attribute ((target ("attr1;;attr2"))). */
+ unsigned int num_commas = num_occurences_in_str (';', str_to_check);
+
+ /* Handle multiple target attributes separated by ','. */
+ char *token = strtok_r (str_to_check, ";", &str_to_check);
+
+ riscv_target_attr_parser attr_parser (loc);
+ unsigned int num_attrs = 0;
+ while (token)
+ {
+ num_attrs++;
+ riscv_process_one_target_attr (token, loc, attr_parser);
+ token = strtok_r (NULL, ";", &str_to_check);
+ }
+
+ if (num_attrs != num_commas + 1)
+ {
+ error_at (loc, "malformed %<target(\"%s\")%> attribute",
+ TREE_STRING_POINTER (args));
+ return false;
+ }
+
+ /* Apply settings from target attribute. */
+ attr_parser.update_settings (opts);
+
+ return true;
+}
+
+/* Implement TARGET_OPTION_VALID_ATTRIBUTE_P. This is used to
+ process attribute ((target ("..."))). */
+
+bool
+riscv_option_valid_attribute_p (tree fndecl, tree, tree args, int)
+{
+ struct cl_target_option cur_target;
+ bool ret;
+ tree new_target;
+ location_t loc = DECL_SOURCE_LOCATION (fndecl);
+
+ /* Save the current target options to restore at the end. */
+ cl_target_option_save (&cur_target, &global_options, &global_options_set);
+
+ ret = riscv_process_target_attr (args, loc, &global_options);
+
+ if (ret)
+ {
+ riscv_override_options_internal (&global_options);
+ new_target
+ = build_target_option_node (&global_options, &global_options_set);
+ }
+ else
+ new_target = NULL;
+
+ if (fndecl && ret)
+ {
+ DECL_FUNCTION_SPECIFIC_TARGET (fndecl) = new_target;
+ }
+
+ cl_target_option_restore (&global_options, &global_options_set, &cur_target);
+ return ret;
+}
@@ -73,10 +73,12 @@ along with GCC; see the file COPYING3. If not see
#include "tree-vectorizer.h"
#include "gcse.h"
#include "tree-dfa.h"
+#include "target-globals.h"
/* This file should be included last. */
#include "target-def.h"
#include "riscv-vector-costs.h"
+#include "riscv-subset.h"
/* True if X is an UNSPEC wrapper around a SYMBOL_REF or LABEL_REF. */
#define UNSPEC_ADDRESS_P(X) \
@@ -261,17 +263,6 @@ struct riscv_tune_param
bool use_divmod_expansion;
};
-/* Information about one micro-arch we know about. */
-struct riscv_tune_info {
- /* This micro-arch canonical name. */
- const char *name;
-
- /* Which automaton to use for tuning. */
- enum riscv_microarchitecture_type microarchitecture;
-
- /* Tuning parameters for this micro-arch. */
- const struct riscv_tune_param *tune_param;
-};
/* Global variables for machine-dependent things. */
@@ -498,10 +489,23 @@ riscv_min_arithmetic_precision (void)
return 32;
}
-/* Return the riscv_tune_info entry for the given name string. */
+template <class T>
+static const char *
+get_tune_str (const T *opts)
+{
+ const char *tune_string = RISCV_TUNE_STRING_DEFAULT;
+ if (opts->x_riscv_tune_string)
+ tune_string = opts->x_riscv_tune_string;
+ else if (opts->x_riscv_cpu_string)
+ tune_string = opts->x_riscv_cpu_string;
+ return tune_string;
+}
+
+/* Return the riscv_tune_info entry for the given name string, return nullptr
+ if NULL_P is true, otherwise return an placeholder and report error. */
-static const struct riscv_tune_info *
-riscv_parse_tune (const char *tune_string)
+const struct riscv_tune_info *
+riscv_parse_tune (const char *tune_string, bool null_p)
{
const riscv_cpu_info *cpu = riscv_find_cpu (tune_string);
@@ -512,6 +516,9 @@ riscv_parse_tune (const char *tune_string)
if (strcmp (riscv_tune_info_table[i].name, tune_string) == 0)
return riscv_tune_info_table + i;
+ if (null_p)
+ return nullptr;
+
error ("unknown cpu %qs for %<-mtune%>", tune_string);
return riscv_tune_info_table;
}
@@ -7929,6 +7936,33 @@ riscv_declare_function_name (FILE *stream, const char *name, tree fndecl)
riscv_asm_output_variant_cc (stream, fndecl, name);
ASM_OUTPUT_TYPE_DIRECTIVE (stream, name, "function");
ASM_OUTPUT_LABEL (stream, name);
+ if (DECL_FUNCTION_SPECIFIC_TARGET (fndecl))
+ {
+ fprintf (stream, "\t.option push\n");
+ std::string isa = riscv_current_subset_list ()->to_string (true);
+ fprintf (stream, "\t.option arch, %s\n", isa.c_str ());
+
+ struct cl_target_option *local_cl_target =
+ TREE_TARGET_OPTION (DECL_FUNCTION_SPECIFIC_TARGET (fndecl));
+ struct cl_target_option *global_cl_target =
+ TREE_TARGET_OPTION (target_option_default_node);
+ const char *local_tune_str = get_tune_str (local_cl_target);
+ const char *global_tune_str = get_tune_str (global_cl_target);
+ if (strcmp (local_tune_str, global_tune_str) != 0)
+ fprintf (stream, "\t# tune = %s\n", local_tune_str);
+ }
+}
+
+void
+riscv_declare_function_size (FILE *stream, const char *name, tree fndecl)
+{
+ if (!flag_inhibit_size_directive)
+ ASM_OUTPUT_MEASURED_SIZE (stream, name);
+
+ if (DECL_FUNCTION_SPECIFIC_TARGET (fndecl))
+ {
+ fprintf (stream, "\t.option pop\n");
+ }
}
/* Implement ASM_OUTPUT_DEF_FROM_DECLS. */
@@ -8135,16 +8169,18 @@ riscv_override_options_internal (struct gcc_options *opts)
error ("%<-mdiv%> requires %<-march%> to subsume the %<M%> extension");
/* Likewise floating-point division and square root. */
- if ((TARGET_HARD_FLOAT || TARGET_ZFINX) && (target_flags_explicit & MASK_FDIV) == 0)
+ if ((TARGET_HARD_FLOAT_OPTS_P (opts) || TARGET_ZFINX_OPTS_P (opts))
+ && ((target_flags_explicit & MASK_FDIV) == 0))
opts->x_target_flags |= MASK_FDIV;
/* Handle -mtune, use -mcpu if -mtune is not given, and use default -mtune
if both -mtune and -mcpu are not given. */
- cpu = riscv_parse_tune (opts->x_riscv_tune_string ? opts->x_riscv_tune_string :
- (opts->x_riscv_cpu_string ? opts->x_riscv_cpu_string :
- RISCV_TUNE_STRING_DEFAULT));
+ const char *tune_string = get_tune_str (opts);
+ cpu = riscv_parse_tune (tune_string, false);
riscv_microarchitecture = cpu->microarchitecture;
- tune_param = opts->x_optimize_size ? &optimize_size_tune_info : cpu->tune_param;
+ tune_param = opts->x_optimize_size
+ ? &optimize_size_tune_info
+ : cpu->tune_param;
/* Use -mtune's setting for slow_unaligned_access, even when optimizing
for size. For architectures that trap and emulate unaligned accesses,
@@ -8156,7 +8192,7 @@ riscv_override_options_internal (struct gcc_options *opts)
/* Make a note if user explicity passed -mstrict-align for later
builtin macro generation. Can't use target_flags_explicitly since
it is set even for -mno-strict-align. */
- riscv_user_wants_strict_align = TARGET_STRICT_ALIGN;
+ riscv_user_wants_strict_align = TARGET_STRICT_ALIGN_OPTS_P (opts);
if ((target_flags_explicit & MASK_STRICT_ALIGN) == 0
&& cpu->tune_param->slow_unaligned_access)
@@ -8314,8 +8350,41 @@ riscv_option_override (void)
init_machine_status = &riscv_init_machine_status;
riscv_override_options_internal (&global_options);
+
+ /* Save these options as the default ones in case we push and pop them later
+ while processing functions with potential target attributes. */
+ target_option_default_node = target_option_current_node
+ = build_target_option_node (&global_options, &global_options_set);
+}
+
+/* Restore or save the TREE_TARGET_GLOBALS from or to NEW_TREE.
+ Used by riscv_set_current_function to
+ make sure optab availability predicates are recomputed when necessary. */
+
+void
+riscv_save_restore_target_globals (tree new_tree)
+{
+ if (TREE_TARGET_GLOBALS (new_tree))
+ restore_target_globals (TREE_TARGET_GLOBALS (new_tree));
+ else if (new_tree == target_option_default_node)
+ restore_target_globals (&default_target_globals);
+ else
+ TREE_TARGET_GLOBALS (new_tree) = save_target_globals_default_opts ();
}
+/* Implements TARGET_OPTION_RESTORE. Restore the backend codegen decisions
+ using the information saved in PTR. */
+
+static void
+riscv_option_restore (struct gcc_options *opts,
+ struct gcc_options * /* opts_set */,
+ struct cl_target_option * /* ptr */)
+{
+ riscv_override_options_internal (opts);
+}
+
+static GTY (()) tree riscv_previous_fndecl;
+
/* Implement TARGET_CONDITIONAL_REGISTER_USAGE. */
static void
@@ -8561,7 +8630,12 @@ riscv_get_interrupt_type (tree decl)
return MACHINE_MODE;
}
-/* Implement `TARGET_SET_CURRENT_FUNCTION'. */
+/* Implement `TARGET_SET_CURRENT_FUNCTION'. Unpack the codegen decisions
+ like tuning and ISA features from the DECL_FUNCTION_SPECIFIC_TARGET
+ of the function, if such exists. This function may be called multiple
+ times on a single function so use aarch64_previous_fndecl to avoid
+ setting up identical state. */
+
/* Sanity cheching for above function attributes. */
static void
riscv_set_current_function (tree decl)
@@ -8569,36 +8643,66 @@ riscv_set_current_function (tree decl)
if (decl == NULL_TREE
|| current_function_decl == NULL_TREE
|| current_function_decl == error_mark_node
- || ! cfun->machine
- || cfun->machine->attributes_checked_p)
+ || ! cfun->machine)
return;
- cfun->machine->naked_p = riscv_naked_function_p (decl);
- cfun->machine->interrupt_handler_p
- = riscv_interrupt_type_p (TREE_TYPE (decl));
+ if (!cfun->machine->attributes_checked_p)
+ {
+ cfun->machine->naked_p = riscv_naked_function_p (decl);
+ cfun->machine->interrupt_handler_p
+ = riscv_interrupt_type_p (TREE_TYPE (decl));
- if (cfun->machine->naked_p && cfun->machine->interrupt_handler_p)
- error ("function attributes %qs and %qs are mutually exclusive",
- "interrupt", "naked");
+ if (cfun->machine->naked_p && cfun->machine->interrupt_handler_p)
+ error ("function attributes %qs and %qs are mutually exclusive",
+ "interrupt", "naked");
- if (cfun->machine->interrupt_handler_p)
- {
- tree ret = TREE_TYPE (TREE_TYPE (decl));
- tree args = TYPE_ARG_TYPES (TREE_TYPE (decl));
+ if (cfun->machine->interrupt_handler_p)
+ {
+ tree ret = TREE_TYPE (TREE_TYPE (decl));
+ tree args = TYPE_ARG_TYPES (TREE_TYPE (decl));
+
+ if (TREE_CODE (ret) != VOID_TYPE)
+ error ("%qs function cannot return a value", "interrupt");
- if (TREE_CODE (ret) != VOID_TYPE)
- error ("%qs function cannot return a value", "interrupt");
+ if (args && TREE_CODE (TREE_VALUE (args)) != VOID_TYPE)
+ error ("%qs function cannot have arguments", "interrupt");
- if (args && TREE_CODE (TREE_VALUE (args)) != VOID_TYPE)
- error ("%qs function cannot have arguments", "interrupt");
+ cfun->machine->interrupt_mode = riscv_get_interrupt_type (decl);
- cfun->machine->interrupt_mode = riscv_get_interrupt_type (decl);
+ gcc_assert (cfun->machine->interrupt_mode != UNKNOWN_MODE);
+ }
- gcc_assert (cfun->machine->interrupt_mode != UNKNOWN_MODE);
+ /* Don't print the above diagnostics more than once. */
+ cfun->machine->attributes_checked_p = 1;
}
- /* Don't print the above diagnostics more than once. */
- cfun->machine->attributes_checked_p = 1;
+ if (!decl || decl == riscv_previous_fndecl)
+ return;
+
+ tree old_tree = (riscv_previous_fndecl
+ ? DECL_FUNCTION_SPECIFIC_TARGET (riscv_previous_fndecl)
+ : NULL_TREE);
+
+ tree new_tree = DECL_FUNCTION_SPECIFIC_TARGET (decl);
+
+ /* If current function has no attributes but the previous one did,
+ use the default node. */
+ if (!new_tree && old_tree)
+ new_tree = target_option_default_node;
+
+ /* If nothing to do, return. #pragma GCC reset or #pragma GCC pop to
+ the default have been handled by aarch64_save_restore_target_globals from
+ aarch64_pragma_target_parse. */
+ if (old_tree == new_tree)
+ return;
+
+ riscv_previous_fndecl = decl;
+
+ /* First set the target options. */
+ cl_target_option_restore (&global_options, &global_options_set,
+ TREE_TARGET_OPTION (new_tree));
+
+ riscv_save_restore_target_globals (new_tree);
}
/* Implement TARGET_MERGE_DECL_ATTRIBUTES. */
@@ -9706,6 +9810,12 @@ riscv_preferred_else_value (unsigned ifn, tree vectype, unsigned int nops,
#undef TARGET_OPTION_OVERRIDE
#define TARGET_OPTION_OVERRIDE riscv_option_override
+#undef TARGET_OPTION_RESTORE
+#define TARGET_OPTION_RESTORE riscv_option_restore
+
+#undef TARGET_OPTION_VALID_ATTRIBUTE_P
+#define TARGET_OPTION_VALID_ATTRIBUTE_P riscv_option_valid_attribute_p
+
#undef TARGET_LEGITIMIZE_ADDRESS
#define TARGET_LEGITIMIZE_ADDRESS riscv_legitimize_address
@@ -25,6 +25,8 @@ along with GCC; see the file COPYING3. If not see
#include <stdbool.h>
#include "config/riscv/riscv-opts.h"
+#define SWITCHABLE_TARGET 1
+
/* Target CPU builtins. */
#define TARGET_CPU_CPP_BUILTINS() riscv_cpu_cpp_builtins (pfile)
@@ -1054,6 +1056,10 @@ while (0)
#define ASM_DECLARE_FUNCTION_NAME(STR, NAME, DECL) \
riscv_declare_function_name (STR, NAME, DECL)
+#undef ASM_DECLARE_FUNCTION_SIZE
+#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
+ riscv_declare_function_size (FILE, FNAME, DECL)
+
/* Add output .variant_cc directive for specific alias definition. */
#undef ASM_OUTPUT_DEF_FROM_DECLS
#define ASM_OUTPUT_DEF_FROM_DECLS(STR, DECL, TARGET) \
@@ -84,11 +84,11 @@ Target RejectNegative Joined Negative(march=)
lower-case.
mtune=
-Target RejectNegative Joined Var(riscv_tune_string)
+Target RejectNegative Joined Var(riscv_tune_string) Save
-mtune=PROCESSOR Optimize the output for PROCESSOR.
mcpu=
-Target RejectNegative Joined Var(riscv_cpu_string)
+Target RejectNegative Joined Var(riscv_cpu_string) Save
-mcpu=PROCESSOR Use architecture of and optimize the output for PROCESSOR.
msmall-data-limit=
@@ -106,7 +106,7 @@ memory accesses to be generated as compressed instructions. Currently targets
32-bit integer load/stores.
mcmodel=
-Target RejectNegative Joined Enum(code_model) Var(riscv_cmodel) Init(TARGET_DEFAULT_CMODEL)
+Target RejectNegative Joined Enum(code_model) Var(riscv_cmodel) Init(TARGET_DEFAULT_CMODEL) Save
Specify the code model.
mstrict-align
@@ -108,6 +108,11 @@ riscv-v.o: $(srcdir)/config/riscv/riscv-v.cc \
$(COMPILE) $<
$(POSTCOMPILE)
+riscv-target-attr.o: $(srcdir)/config/riscv/riscv-target-attr.cc $(CONFIG_H) \
+ $(SYSTEM_H) coretypes.h $(TM_H) $(TREE_H) $(DIAGNOSTIC_CORE_H)
+ $(COMPILER) -c $(ALL_COMPILERFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) \
+ $(srcdir)/config/riscv/riscv-target-attr.cc
+
thead.o: $(srcdir)/config/riscv/thead.cc \
$(CONFIG_H) $(SYSTEM_H) coretypes.h $(TARGET_H) backend.h $(RTL_H) \
memmodel.h $(EMIT_RTL_H) poly-int.h output.h
@@ -6227,8 +6227,66 @@ void f (void) __attribute__ ((interrupt ("user")));
Permissible values for this parameter are @code{user}, @code{supervisor},
and @code{machine}. If there is no parameter, then it defaults to
@code{machine}.
+
+@end table
+
+The following target-specific function attributes are available for the
+RISC-V target. For the most part, these options mirror the behavior of
+similar command-line options (@pxref{RISC-V Options}), but on a
+per-function basis.
+
+@table @code
+@cindex @code{arch=} function attribute, RISC-V
+@item arch=
+Specifies the architecture version and architectural extensions to use
+for this function. The behavior and permissible arguments are the same as
+for the @option{-march=} command-line option, in addtion, it also support
+extension enablement list, a list of extension name and prefixed with @code{+},
+like @code{arch=+zba} means enable @code{zba} extension.
+Multiple extension can be enabled by separating them with a comma. For example:
+@code{arch=+zba,+zbb}.
+
+@cindex @code{tune=} function attribute, RISC-V
+@item tune=
+Specifies the core for which to tune the performance of this function.
+The behavior and permissible arguments are the same as for the @option{-mtune=}
+command-line option.
+
+@cindex @code{cpu=} function attribute, RISC-V
+@item cpu=
+Specifies the core for which to tune the performance of this function and also
+whose architectural features to use. The behavior and valid arguments are the
+same as for the @option{-mcpu=} command-line option.
+
@end table
+The above target attributes can be specified as follows:
+
+@smallexample
+__attribute__((target("@var{attr-string}")))
+int
+f (int a)
+@{
+ return a + 5;
+@}
+@end smallexample
+
+where @code{@var{attr-string}} is one of the attribute strings specified above.
+
+Multiple target function attributes can be specified by separating them with
+a semicolon. For example:
+@smallexample
+__attribute__((target("arch=+zba,+zbb;tune=rocket")))
+int
+foo (int a)
+@{
+ return a + 5;
+@}
+@end smallexample
+
+is valid and compiles function @code{foo} with @code{zba}
+and @code{zbb} extensions and tunes it for @code{rocket}.
+
@node RL78 Function Attributes
@subsection RL78 Function Attributes
new file mode 100644
@@ -0,0 +1,31 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+
+/*
+** foo:
+** ...
+** sh1add\s*a0,a1,a0
+** ...
+*/
+
+
+long foo() __attribute__((target("arch=rv64gc_zba")));
+long foo(long a, long b){
+ return a + (b * 2);
+}
+
+/*
+** bar:
+** ...
+** slli\s*a1,a1,1
+** add\s*a0,a1,a0
+** ...
+*/
+
+
+long bar(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,31 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+
+/*
+** foo:
+** ...
+** sh1add\s*a0,a1,a0
+** ...
+*/
+
+
+long foo() __attribute__((target("arch=+zba")));
+long foo(long a, long b){
+ return a + (b * 2);
+}
+
+/*
+** bar:
+** ...
+** slli\s*a1,a1,1
+** add\s*a0,a1,a0
+** ...
+*/
+
+
+long bar(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,26 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc_zba -O2 -mabi=lp64" } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+/*
+** foo:
+** ...
+** slli\s*a1,a1,1
+** add\s*a0,a1,a0
+** ...
+*/
+long foo() __attribute__((target("arch=rv64gc")));
+long foo(long a, long b){
+ return a + (b * 2);
+}
+
+/*
+** bar:
+** ...
+** sh1add\s*a0,a1,a0
+** ...
+*/
+long bar(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,28 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc_zba -O2 -mabi=lp64 -mtune=rocket" } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+/*
+** foo:
+** ...
+** # tune = sifive-7-series
+** ...
+** slli\s*a1,a1,1
+** add\s*a0,a1,a0
+** ...
+*/
+long foo() __attribute__((target("cpu=sifive-u74")));
+long foo(long a, long b){
+ return a + (b * 2);
+}
+
+/*
+** bar:
+** ...
+** sh1add\s*a0,a1,a0
+** ...
+*/
+long bar(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,27 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc_zba -O2 -mabi=lp64 -mtune=rocket" } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+/*
+** foo:
+** ...
+** # tune = sifive-7-series
+** ...
+** sh1add\s*a0,a1,a0
+** ...
+*/
+long foo() __attribute__((target("cpu=sifive-u74;arch=rv64gc_zba")));
+long foo(long a, long b){
+ return a + (b * 2);
+}
+
+/*
+** bar:
+** ...
+** sh1add\s*a0,a1,a0
+** ...
+*/
+long bar(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,27 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc_zba -O2 -mabi=lp64 -mtune=rocket" } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+/*
+** foo:
+** ...
+** # tune = sifive-5-series
+** ...
+** sh1add\s*a0,a1,a0
+** ...
+*/
+long foo() __attribute__((target("cpu=sifive-u74;tune=sifive-5-series;arch=rv64gc_zba")));
+long foo(long a, long b){
+ return a + (b * 2);
+}
+
+/*
+** bar:
+** ...
+** sh1add\s*a0,a1,a0
+** ...
+*/
+long bar(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,25 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc_zba -O2 -mabi=lp64 -mtune=rocket" } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+/*
+** foo:
+** ...
+** # tune = sifive-5-series
+** ...
+*/
+long foo() __attribute__((target("tune=sifive-5-series")));
+long foo(long a, long b){
+ return a + (b * 2);
+}
+
+/*
+** bar:
+** ...
+** sh1add\s*a0,a1,a0
+** ...
+*/
+long bar(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
+
+
+long foo() __attribute__((target("arch=rv64gc_zba;;"))); /* { dg-error "malformed" } */
+long foo(long a, long b){
+ return a + (b * 2);
+}
+
+long bar(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
+
+
+long foo() __attribute__((target("cpu=xyz-cpu"))); /* { dg-error "unknown CPU" } */
+long foo(long a, long b){
+ return a + (b * 2);
+}
+
+long bar(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
+
+
+long foo() __attribute__((target("tune=xyz-cpu"))); /* { dg-error "unknown TUNE" } */
+long foo(long a, long b){
+ return a + (b * 2);
+}
+
+long bar(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
+
+
+long foo() __attribute__((target(123))); /* { dg-error "argument not a string" } */
+long foo(long a, long b){
+ return a + (b * 2);
+}
+
+long bar(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
+
+
+long foo() __attribute__((target(""))); /* { dg-warning "empty string in attribute .target." } */
+long foo(long a, long b){
+ return a + (b * 2);
+}
+
+long bar(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
+
+
+long foo() __attribute__((target("arch=*x"))); /* { dg-error "must start with \\+ or rv" } */
+long foo(long a, long b){
+ return a + (b * 2);
+}
+
+long bar(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
+
+
+long foo() __attribute__((target("arch=+zbb_zba"))); /* { dg-error "extension 'zbb_zba' starts with 'z' but is unsupported standard extension" } */
+long foo(long a, long b){
+ return a + (b * 2);
+}
+
+long bar(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
+
+long foo() __attribute__((target("arch=rv64gc_zba;arch=rv64gc_zba"))); /* { dg-warning "arch appears more than once" } */
+long foo(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
+
+long foo() __attribute__((target("cpu=sifive-u74;cpu=sifive-u74"))); /* { dg-warning "cpu appears more than once" } */
+long foo(long a, long b){
+ return a + (b * 2);
+}
new file mode 100644
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } } */
+/* { dg-options "-march=rv64gc -O2 -mabi=lp64" } */
+
+long foo() __attribute__((target("tune=sifive-u74;tune=sifive-u74"))); /* { dg-warning "tune appears more than once" } */
+long foo(long a, long b){
+ return a + (b * 2);
+}