[GCC 4.8] Initial check-in of GCC 4.8.0

Change-Id: I0719d8a6d0f69b367a6ab6f10eb75622dbf12771

1 files changed, 293 insertions, 0 deletions

diff --git a/gcc-4.8/gcc/config/sol2.c b/gcc-4.8/gcc/config/sol2.c
new file mode 100644
index 000000000..33c8c3d53
--- /dev/null
+++ b/gcc-4.8/gcc/config/sol2.c
@@ -0,0 +1,293 @@
+/* General Solaris system support.
+   Copyright (C) 2004-2013 Free Software Foundation, Inc.
+   Contributed by CodeSourcery, LLC.
+
+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/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tree.h"
+#include "output.h"
+#include "tm.h"
+#include "rtl.h"
+#include "target.h"
+#include "tm_p.h"
+#include "diagnostic-core.h"
+#include "ggc.h"
+#include "hashtab.h"
+
+tree solaris_pending_aligns, solaris_pending_inits, solaris_pending_finis;
+
+/* Attach any pending attributes for DECL to the list in *ATTRIBUTES.
+   Pending attributes come from #pragma or _Pragma, so this code is
+   only useful in the C family front ends, but it is included in
+   all languages to avoid changing the target machine initializer
+   depending on the language.  */
+
+void
+solaris_insert_attributes (tree decl, tree *attributes)
+{
+  tree *x, next;
+
+  if (solaris_pending_aligns != NULL && TREE_CODE (decl) == VAR_DECL)
+    for (x = &solaris_pending_aligns; *x; x = &TREE_CHAIN (*x))
+      {
+	tree name = TREE_PURPOSE (*x);
+	tree value = TREE_VALUE (*x);
+	if (DECL_NAME (decl) == name)
+	  {
+	    if (lookup_attribute ("aligned", DECL_ATTRIBUTES (decl))
+		|| lookup_attribute ("aligned", *attributes))
+	      warning (0, "ignoring %<#pragma align%> for explicitly "
+		       "aligned %q+D", decl);
+	    else
+	      *attributes = tree_cons (get_identifier ("aligned"), value,
+				       *attributes);
+	    next = TREE_CHAIN (*x);
+	    ggc_free (*x);
+	    *x = next;
+	    break;
+	  }
+      }
+
+  if (solaris_pending_inits != NULL && TREE_CODE (decl) == FUNCTION_DECL)
+    for (x = &solaris_pending_inits; *x; x = &TREE_CHAIN (*x))
+      {
+	tree name = TREE_PURPOSE (*x);
+	if (DECL_NAME (decl) == name)
+	  {
+	    *attributes = tree_cons (get_identifier ("init"), NULL,
+				     *attributes);
+	    TREE_USED (decl) = 1;
+	    DECL_PRESERVE_P (decl) = 1;
+	    next = TREE_CHAIN (*x);
+	    ggc_free (*x);
+	    *x = next;
+	    break;
+	  }
+      }
+
+  if (solaris_pending_finis != NULL && TREE_CODE (decl) == FUNCTION_DECL)
+    for (x = &solaris_pending_finis; *x; x = &TREE_CHAIN (*x))
+      {
+	tree name = TREE_PURPOSE (*x);
+	if (DECL_NAME (decl) == name)
+	  {
+	    *attributes = tree_cons (get_identifier ("fini"), NULL,
+				     *attributes);
+	    TREE_USED (decl) = 1;
+	    DECL_PRESERVE_P (decl) = 1;
+	    next = TREE_CHAIN (*x);
+	    ggc_free (*x);
+	    *x = next;
+	    break;
+	  }
+      }
+}
+
+/* Output initializer or finalizer entries for DECL to FILE.  */
+
+void
+solaris_output_init_fini (FILE *file, tree decl)
+{
+  if (lookup_attribute ("init", DECL_ATTRIBUTES (decl)))
+    {
+      fprintf (file, "\t.pushsection\t" SECTION_NAME_FORMAT "\n", ".init");
+      ASM_OUTPUT_CALL (file, decl);
+      fprintf (file, "\t.popsection\n");
+    }
+
+  if (lookup_attribute ("fini", DECL_ATTRIBUTES (decl)))
+    {
+      fprintf (file, "\t.pushsection\t" SECTION_NAME_FORMAT "\n", ".fini");
+      ASM_OUTPUT_CALL (file, decl);
+      fprintf (file, "\t.popsection\n");
+    }
+}
+
+/* Emit an assembler directive to set symbol for DECL visibility to
+   the visibility type VIS, which must not be VISIBILITY_DEFAULT.  */
+
+void
+solaris_assemble_visibility (tree decl, int vis ATTRIBUTE_UNUSED)
+{
+#ifdef HAVE_GAS_HIDDEN
+  /* Sun as uses .symbolic for STV_PROTECTED.  STV_INTERNAL is marked as
+     `currently reserved', but the linker treats it like STV_HIDDEN.  Sun
+     Studio 12.1 cc emits .hidden instead.
+
+     There are 3 Sun extensions GCC doesn't yet know about: STV_EXPORTED,
+     STV_SINGLETON, and STV_ELIMINATE.
+
+     See Linker and Libraries Guide, Ch. 2, Link-Editor, Defining
+     Additional Symbols, and Ch. 7, Object-File Format, Symbol Table
+     Section.  */
+
+  static const char * const visibility_types[] = {
+    NULL, "symbolic", "hidden", "hidden"
+  };
+
+  const char *name, *type;
+
+  name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
+  type = visibility_types[vis];
+
+  fprintf (asm_out_file, "\t.%s\t", type);
+  assemble_name (asm_out_file, name);
+  fprintf (asm_out_file, "\n");
+#else
+  if (!DECL_ARTIFICIAL (decl))
+    warning (OPT_Wattributes, "visibility attribute not supported "
+			      "in this configuration; ignored");
+#endif
+}
+
+/* Hash table of group signature symbols.  */
+
+static htab_t solaris_comdat_htab;
+
+/* Group section information entry stored in solaris_comdat_htab.  */
+
+typedef struct comdat_entry
+{
+  const char *name;
+  unsigned int flags;
+  tree decl;
+  const char *sig;
+} comdat_entry;
+
+/* Helper routines for maintaining solaris_comdat_htab.  */
+
+static hashval_t
+comdat_hash (const void *p)
+{
+  const comdat_entry *entry = (const comdat_entry *) p;
+
+  return htab_hash_string (entry->sig);
+}
+
+static int
+comdat_eq (const void *p1, const void *p2)
+{
+  const comdat_entry *entry1 = (const comdat_entry *) p1;
+  const comdat_entry *entry2 = (const comdat_entry *) p2;
+
+  return strcmp (entry1->sig, entry2->sig) == 0;
+}
+
+/* Output assembly to switch to COMDAT group section NAME with attributes
+   FLAGS and group signature symbol DECL, using Sun as syntax.  */
+
+void
+solaris_elf_asm_comdat_section (const char *name, unsigned int flags, tree decl)
+{
+  const char *signature;
+  char *section;
+  comdat_entry entry, **slot;
+
+  if (TREE_CODE (decl) == IDENTIFIER_NODE)
+    signature = IDENTIFIER_POINTER (decl);
+  else
+    signature = IDENTIFIER_POINTER (DECL_COMDAT_GROUP (decl));
+
+  /* Sun as requires group sections to be fragmented, i.e. to have names of
+     the form <section>%<fragment>.  Strictly speaking this is only
+     necessary to support cc -xF, but is enforced globally in violation of
+     the ELF gABI.  We keep the section names generated by GCC (generally
+     of the form .text.<signature>) and append %<signature> to pacify as,
+     despite the redundancy.  */
+  section = concat (name, "%", signature, NULL);
+
+  /* Clear SECTION_LINKONCE flag so targetm.asm_out.named_section only
+     emits this as a regular section.  Emit section before .group
+     directive since Sun as treats undeclared sections as @progbits,
+     which conflicts with .bss* sections which are @nobits.  */
+  targetm.asm_out.named_section (section, flags & ~SECTION_LINKONCE, decl);
+  
+  /* Sun as separates declaration of a group section and of the group
+     itself, using the .group directive and the #comdat flag.  */
+  fprintf (asm_out_file, "\t.group\t%s," SECTION_NAME_FORMAT ",#comdat\n",
+	   signature, section);
+
+  /* Unlike GNU as, group signature symbols need to be defined explicitly
+     for Sun as.  With a few exceptions, this is already the case.  To
+     identify the missing ones without changing the affected frontents,
+     remember the signature symbols and emit those not marked
+     TREE_SYMBOL_REFERENCED in solaris_file_end.  */
+  if (solaris_comdat_htab == NULL)
+    solaris_comdat_htab = htab_create_alloc (37, comdat_hash, comdat_eq, NULL,
+					     xcalloc, free);
+
+  entry.sig = signature;
+  slot = (comdat_entry **) htab_find_slot (solaris_comdat_htab, &entry, INSERT);
+
+  if (*slot == NULL)
+    {
+      *slot = XCNEW (comdat_entry);
+      /* Remember fragmented section name.  */
+      (*slot)->name = section;
+      /* Emit as regular section, .group declaration has already been done.  */
+      (*slot)->flags = flags & ~SECTION_LINKONCE;
+      (*slot)->decl = decl;
+      (*slot)->sig = signature;
+    }
+}
+
+/* Define unreferenced COMDAT group signature symbol corresponding to SLOT.  */
+
+static int
+solaris_define_comdat_signature (void **slot, void *aux ATTRIBUTE_UNUSED)
+{
+  comdat_entry *entry = *(comdat_entry **) slot;
+  tree decl = entry->decl;
+
+  if (TREE_CODE (decl) != IDENTIFIER_NODE)
+    decl = DECL_COMDAT_GROUP (decl);
+
+  if (!TREE_SYMBOL_REFERENCED (decl))
+    {
+      /* Switch to group section, otherwise Sun as complains
+	 `Group Id symbol defined outside of group'.  */
+      switch_to_section (get_section (entry->name, entry->flags, entry->decl));
+
+      ASM_OUTPUT_LABEL (asm_out_file, entry->sig);
+    }
+
+  /* Continue with scan.  */
+  return 1;
+}
+
+/* Emit unreferenced COMDAT group signature symbols for Sun as.  */
+
+void
+solaris_file_end (void)
+{
+  if (solaris_comdat_htab == NULL)
+    return;
+
+  htab_traverse (solaris_comdat_htab, solaris_define_comdat_signature, NULL);
+}
+
+void
+solaris_override_options (void)
+{
+  /* Don't emit DWARF3/4 unless specifically selected.  Solaris ld cannot
+     handle CIE version 3 in .eh_frame.  */
+  if (!global_options_set.x_dwarf_version)
+    dwarf_version = 2;
+}