Initial check-in of gcc 4.7.2.

Change-Id: I4a2f5a921c21741a0e18bda986d77e5f1bef0365

1 files changed, 257 insertions, 0 deletions

diff --git a/gcc-4.7/gcc/config/arm/pe.c b/gcc-4.7/gcc/config/arm/pe.c
new file mode 100644
index 000000000..3d9efd578
--- /dev/null
+++ b/gcc-4.7/gcc/config/arm/pe.c
@@ -0,0 +1,257 @@
+/* Routines for GCC for ARM/pe.
+   Copyright (C) 1995, 1996, 2000, 2001, 2002, 2004, 2005, 2007, 2008, 2010
+   Free Software Foundation, Inc.
+   Contributed by Doug Evans (dje@cygnus.com).
+
+   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 "tm.h"
+#include "rtl.h"
+#include "output.h"
+#include "flags.h"
+#include "tree.h"
+#include "expr.h"
+#include "diagnostic-core.h"
+#include "tm_p.h"
+
+extern int current_function_anonymous_args;
+
+
+/* Return nonzero if DECL is a dllexport'd object.  */
+
+tree current_class_type; /* FIXME */
+
+int
+arm_dllexport_p (tree decl)
+{
+  tree exp;
+
+  if (TREE_CODE (decl) != VAR_DECL
+      && TREE_CODE (decl) != FUNCTION_DECL)
+    return 0;
+  exp = lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl));
+  if (exp)
+    return 1;
+
+  return 0;
+}
+
+/* Return nonzero if DECL is a dllimport'd object.  */
+
+int
+arm_dllimport_p (tree decl)
+{
+  tree imp;
+
+  if (TREE_CODE (decl) == FUNCTION_DECL
+      && TARGET_NOP_FUN_DLLIMPORT)
+    return 0;
+
+  if (TREE_CODE (decl) != VAR_DECL
+      && TREE_CODE (decl) != FUNCTION_DECL)
+    return 0;
+  imp = lookup_attribute ("dllimport", DECL_ATTRIBUTES (decl));
+  if (imp)
+    return 1;
+
+  return 0;
+}
+
+/* Return nonzero if SYMBOL is marked as being dllexport'd.  */
+
+int
+arm_dllexport_name_p (const char *symbol)
+{
+  return symbol[0] == ARM_PE_FLAG_CHAR && symbol[1] == 'e' && symbol[2] == '.';
+}
+
+/* Return nonzero if SYMBOL is marked as being dllimport'd.  */
+
+int
+arm_dllimport_name_p (const char *symbol)
+{
+  return symbol[0] == ARM_PE_FLAG_CHAR && symbol[1] == 'i' && symbol[2] == '.';
+}
+
+/* Mark a DECL as being dllexport'd.
+   Note that we override the previous setting (e.g.: dllimport).  */
+
+void
+arm_mark_dllexport (tree decl)
+{
+  const char * oldname;
+  char * newname;
+  rtx rtlname;
+  tree idp;
+
+  rtlname = XEXP (DECL_RTL (decl), 0);
+  if (GET_CODE (rtlname) == MEM)
+    rtlname = XEXP (rtlname, 0);
+  gcc_assert (GET_CODE (rtlname) == SYMBOL_REF);
+  oldname = XSTR (rtlname, 0);
+  
+  if (arm_dllimport_name_p (oldname))
+    oldname += 9;
+  else if (arm_dllexport_name_p (oldname))
+    return; /* already done */
+
+  newname = XALLOCAVEC (char, strlen (oldname) + 4);
+  sprintf (newname, "%ce.%s", ARM_PE_FLAG_CHAR, oldname);
+
+  /* We pass newname through get_identifier to ensure it has a unique
+     address.  RTL processing can sometimes peek inside the symbol ref
+     and compare the string's addresses to see if two symbols are
+     identical.  */
+  /* ??? At least I think that's why we do this.  */
+  idp = get_identifier (newname);
+
+  XEXP (DECL_RTL (decl), 0) =
+    gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (idp));
+}
+
+/* Mark a DECL as being dllimport'd.  */
+
+void
+arm_mark_dllimport (tree decl)
+{
+  const char * oldname;
+  char * newname;
+  tree idp;
+  rtx rtlname, newrtl;
+
+  rtlname = XEXP (DECL_RTL (decl), 0);
+  
+  if (GET_CODE (rtlname) == MEM)
+    rtlname = XEXP (rtlname, 0);
+  gcc_assert (GET_CODE (rtlname) == SYMBOL_REF);
+  oldname = XSTR (rtlname, 0);
+  
+  gcc_assert (!arm_dllexport_name_p (oldname));
+  if (arm_dllimport_name_p (oldname))
+    return; /* already done */
+
+  /* ??? One can well ask why we're making these checks here,
+     and that would be a good question.  */
+
+  /* Imported variables can't be initialized.  */
+  if (TREE_CODE (decl) == VAR_DECL
+      && !DECL_VIRTUAL_P (decl)
+      && DECL_INITIAL (decl))
+    {
+      error ("initialized variable %q+D is marked dllimport", decl);
+      return;
+    }
+  /* Nor can they be static.  */
+  if (TREE_CODE (decl) == VAR_DECL
+      /* ??? Is this test for vtables needed?  */
+      && !DECL_VIRTUAL_P (decl)
+      && 0 /*???*/)
+    {
+      error ("static variable %q+D is marked dllimport", decl);
+      return;
+    }
+
+  /* `extern' needn't be specified with dllimport.
+     Specify `extern' now and hope for the best.  Sigh.  */
+  if (TREE_CODE (decl) == VAR_DECL
+      /* ??? Is this test for vtables needed?  */
+      && !DECL_VIRTUAL_P (decl))
+    {
+      DECL_EXTERNAL (decl) = 1;
+      TREE_PUBLIC (decl) = 1;
+    }
+
+  newname = XALLOCAVEC (char, strlen (oldname) + 11);
+  sprintf (newname, "%ci.__imp_%s", ARM_PE_FLAG_CHAR, oldname);
+
+  /* We pass newname through get_identifier to ensure it has a unique
+     address.  RTL processing can sometimes peek inside the symbol ref
+     and compare the string's addresses to see if two symbols are
+     identical.  */
+  /* ??? At least I think that's why we do this.  */
+  idp = get_identifier (newname);
+
+  newrtl = gen_rtx_MEM (Pmode,
+			gen_rtx_SYMBOL_REF (Pmode,
+					    IDENTIFIER_POINTER (idp)));
+  XEXP (DECL_RTL (decl), 0) = newrtl;
+}
+
+void
+arm_pe_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED)
+{
+  /* This bit is copied from arm_encode_section_info.  */
+  if (optimize > 0 && TREE_CONSTANT (decl))
+    SYMBOL_REF_FLAG (XEXP (rtl, 0)) = 1;
+
+  /* Mark the decl so we can tell from the rtl whether the object is
+     dllexport'd or dllimport'd.  */
+  if (arm_dllexport_p (decl))
+    arm_mark_dllexport (decl);
+  else if (arm_dllimport_p (decl))
+    arm_mark_dllimport (decl);
+  /* It might be that DECL has already been marked as dllimport, but a
+     subsequent definition nullified that.  The attribute is gone but
+     DECL_RTL still has @i.__imp_foo.  We need to remove that.  */
+  else if ((TREE_CODE (decl) == FUNCTION_DECL
+	    || TREE_CODE (decl) == VAR_DECL)
+	   && DECL_RTL (decl) != NULL_RTX
+	   && GET_CODE (DECL_RTL (decl)) == MEM
+	   && GET_CODE (XEXP (DECL_RTL (decl), 0)) == MEM
+	   && GET_CODE (XEXP (XEXP (DECL_RTL (decl), 0), 0)) == SYMBOL_REF
+	   && arm_dllimport_name_p (XSTR (XEXP (XEXP (DECL_RTL (decl), 0), 0), 0)))
+    {
+      const char *oldname = XSTR (XEXP (XEXP (DECL_RTL (decl), 0), 0), 0);
+      tree idp = get_identifier (oldname + 9);
+      rtx newrtl = gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (idp));
+
+      XEXP (DECL_RTL (decl), 0) = newrtl;
+
+      /* We previously set TREE_PUBLIC and DECL_EXTERNAL.
+	 ??? We leave these alone for now.  */
+    }
+}
+
+void
+arm_pe_unique_section (tree decl, int reloc)
+{
+  int len;
+  const char * name;
+  char * string;
+  const char * prefix;
+
+  name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
+  name = arm_strip_name_encoding (name);
+
+  /* The object is put in, for example, section .text$foo.
+     The linker will then ultimately place them in .text
+     (everything from the $ on is stripped).  */
+  if (TREE_CODE (decl) == FUNCTION_DECL)
+    prefix = ".text$";
+  else if (decl_readonly_section (decl, reloc))
+    prefix = ".rdata$";
+  else
+    prefix = ".data$";
+  len = strlen (name) + strlen (prefix);
+  string = XALLOCAVEC (char, len + 1);
+  sprintf (string, "%s%s", prefix, name);
+
+  DECL_SECTION_NAME (decl) = build_string (len, string);
+}