c-common.h (enum rid): Add RID_THREAD.

        * c-common.h (enum rid): Add RID_THREAD.
        * c-decl.c (start_decl): Do not set DECL_COMMON for tls variables.
        (grokdeclarator): Grok __thread.
        * c-parse.in (reswords): Add __thread.
        (rid_to_yy): Add RID_THREAD.
        * cp/lex.c (rid_to_yy): Add RID_THREAD.

        * tree.h (DECL_THREAD_LOCAL): New.
        (struct tree_decl): Add thread_local_flag.
        * print-tree.c (print_node): Dump DECL_THREAD_LOCAL.
        * tree.c (staticp): TLS variables are not static.

        * target-def.h (TARGET_HAVE_TLS): New.
        * target.h (have_tls): New.
        * output.h (SECTION_TLS): New.
        * varasm.c (assemble_variable): TLS variables can't be common for now.
        (default_section_type_flags): Handle .tdata and .tbss.
        (default_elf_asm_named_section): Handle SECTION_TLS.
        (categorize_decl_for_section): Handle DECL_THREAD_LOCAL.

        * flags.h (flag_tls_default): Declare.
        * toplev.c (flag_tls_default): Define.
        (display_help): Display help for it.
        (decode_f_option): Set it.

        * doc/extend.texi (Thread-Local): New node describing language-level
        thread-local storage.
        * doc/invoke.texi (-ftls-model): Document.

        * fixinc/inclhack.def (thread_keyword): New.
        * fixinc/fixincl.x: Rebuild.

From-SVN: r53715

1 files changed, 20 insertions, 3 deletions

diff --git a/gcc/toplev.c b/gcc/toplev.c
index 878cdca84c3..a7e856b2d87 100644
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -685,12 +685,15 @@ int flag_shared_data;
 int flag_delayed_branch;
 
 /* Nonzero if we are compiling pure (sharable) code.
-   Value is 1 if we are doing reasonable (i.e. simple
-   offset into offset table) pic.  Value is 2 if we can
-   only perform register offsets.  */
+   Value is 1 if we are doing "small" pic; value is 2 if we're doing
+   "large" pic.  */
 
 int flag_pic;
 
+/* Set to the default thread-local storage (tls) model to use.  */
+
+enum tls_model flag_tls_default;
+
 /* Nonzero means generate extra code for exception handling and enable
    exception handling.  */
 
@@ -3547,6 +3550,7 @@ display_help ()
   printf (_("  -finline-limit=<number> Limits the size of inlined functions to <number>\n"));
   printf (_("  -fmessage-length=<number> Limits diagnostics messages lengths to <number> characters per line.  0 suppresses line-wrapping\n"));
   printf (_("  -fdiagnostics-show-location=[once | every-line] Indicates how often source location information should be emitted, as prefix, at the beginning of diagnostics when line-wrapping\n"));
+  printf (_("  -ftls-model=[global-dynamic | local-dynamic | initial-exec | local-exec] Indicates the default thread-local storage code generation model\n"));
 
   for (i = ARRAY_SIZE (f_options); i--;)
     {
@@ -3825,6 +3829,19 @@ decode_f_option (arg)
 				 MAX_INLINE_INSNS);
       set_param_value ("max-inline-insns", val);
     }
+  else if ((option_value = skip_leading_substring (arg, "tls-model=")))
+    {
+      if (strcmp (option_value, "global-dynamic") == 0)
+	flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
+      else if (strcmp (option_value, "local-dynamic") == 0)
+	flag_tls_default = TLS_MODEL_LOCAL_DYNAMIC;
+      else if (strcmp (option_value, "initial-exec") == 0)
+	flag_tls_default = TLS_MODEL_INITIAL_EXEC;
+      else if (strcmp (option_value, "local-exec") == 0)
+	flag_tls_default = TLS_MODEL_LOCAL_EXEC;
+      else
+	warning ("`%s': unknown tls-model option", arg - 2);
+    }
 #ifdef INSN_SCHEDULING
   else if ((option_value = skip_leading_substring (arg, "sched-verbose=")))
     fix_sched_param ("verbose", option_value);