// dear imgui: Platform Binding for Windows (standard windows API for 32 and 64 bits applications) // This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..) // Implemented features: // [X] Platform: Clipboard support (for Win32 this is actually part of core imgui) // [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'. // [X] Platform: Keyboard arrays indexed using VK_* Virtual Key Codes, e.g. ImGui::IsKeyPressed(VK_SPACE). // Missing features: // [ ] Platform: Gamepad support (best leaving it to user application to fill io.NavInputs[] with gamepad inputs from their source of choice). #include "imgui.h" #include "imgui_impl_win32.h" #ifndef WIN32_LEAN_AND_MEAN #define WIN32_LEAN_AND_MEAN #endif #include #include // CHANGELOG // (minor and older changes stripped away, please see git history for details) // 2018-06-29: Inputs: Added support for the ImGuiMouseCursor_Hand cursor. // 2018-06-10: Inputs: Fixed handling of mouse wheel messages to support fine position messages (typically sent by track-pads). // 2018-06-08: Misc: Extracted imgui_impl_win32.cpp/.h away from the old combined DX9/DX10/DX11/DX12 examples. // 2018-03-20: Misc: Setup io.BackendFlags ImGuiBackendFlags_HasMouseCursors and ImGuiBackendFlags_HasSetMousePos flags + honor ImGuiConfigFlags_NoMouseCursorChange flag. // 2018-02-20: Inputs: Added support for mouse cursors (ImGui::GetMouseCursor() value and WM_SETCURSOR message handling). // 2018-02-06: Inputs: Added mapping for ImGuiKey_Space. // 2018-02-06: Inputs: Honoring the io.WantSetMousePos by repositioning the mouse (when using navigation and ImGuiConfigFlags_NavMoveMouse is set). // 2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves. // 2018-01-20: Inputs: Added Horizontal Mouse Wheel support. // 2018-01-08: Inputs: Added mapping for ImGuiKey_Insert. // 2018-01-05: Inputs: Added WM_LBUTTONDBLCLK double-click handlers for window classes with the CS_DBLCLKS flag. // 2017-10-23: Inputs: Added WM_SYSKEYDOWN / WM_SYSKEYUP handlers so e.g. the VK_MENU key can be read. // 2017-10-23: Inputs: Using Win32 ::SetCapture/::GetCapture() to retrieve mouse positions outside the client area when dragging. // 2016-11-12: Inputs: Only call Win32 ::SetCursor(NULL) when io.MouseDrawCursor is set. // Win32 Data static HWND g_hWnd = 0; static INT64 g_Time = 0; static INT64 g_TicksPerSecond = 0; static ImGuiMouseCursor g_LastMouseCursor = ImGuiMouseCursor_COUNT; // Functions bool ImGui_ImplWin32_Init(void* hwnd) { if (!::QueryPerformanceFrequency((LARGE_INTEGER *)&g_TicksPerSecond)) return false; if (!::QueryPerformanceCounter((LARGE_INTEGER *)&g_Time)) return false; // Setup back-end capabilities flags g_hWnd = (HWND)hwnd; ImGuiIO& io = ImGui::GetIO(); io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional) io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used) io.ImeWindowHandle = hwnd; // Keyboard mapping. ImGui will use those indices to peek into the io.KeysDown[] array that we will update during the application lifetime. io.KeyMap[ImGuiKey_Tab] = VK_TAB; io.KeyMap[ImGuiKey_LeftArrow] = VK_LEFT; io.KeyMap[ImGuiKey_RightArrow] = VK_RIGHT; io.KeyMap[ImGuiKey_UpArrow] = VK_UP; io.KeyMap[ImGuiKey_DownArrow] = VK_DOWN; io.KeyMap[ImGuiKey_PageUp] = VK_PRIOR; io.KeyMap[ImGuiKey_PageDown] = VK_NEXT; io.KeyMap[ImGuiKey_Home] = VK_HOME; io.KeyMap[ImGuiKey_End] = VK_END; io.KeyMap[ImGuiKey_Insert] = VK_INSERT; io.KeyMap[ImGuiKey_Delete] = VK_DELETE; io.KeyMap[ImGuiKey_Backspace] = VK_BACK; io.KeyMap[ImGuiKey_Space] = VK_SPACE; io.KeyMap[ImGuiKey_Enter] = VK_RETURN; io.KeyMap[ImGuiKey_Escape] = VK_ESCAPE; io.KeyMap[ImGuiKey_A] = 'A'; io.KeyMap[ImGuiKey_C] = 'C'; io.KeyMap[ImGuiKey_V] = 'V'; io.KeyMap[ImGuiKey_X] = 'X'; io.KeyMap[ImGuiKey_Y] = 'Y'; io.KeyMap[ImGuiKey_Z] = 'Z'; return true; } void ImGui_ImplWin32_Shutdown() { g_hWnd = (HWND)0; } static bool ImGui_ImplWin32_UpdateMouseCursor() { ImGuiIO& io = ImGui::GetIO(); if (io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange) return false; ImGuiMouseCursor imgui_cursor = ImGui::GetMouseCursor(); if (imgui_cursor == ImGuiMouseCursor_None || io.MouseDrawCursor) { // Hide OS mouse cursor if imgui is drawing it or if it wants no cursor ::SetCursor(NULL); } else { // Show OS mouse cursor LPTSTR win32_cursor = IDC_ARROW; switch (imgui_cursor) { case ImGuiMouseCursor_Arrow: win32_cursor = IDC_ARROW; break; case ImGuiMouseCursor_TextInput: win32_cursor = IDC_IBEAM; break; case ImGuiMouseCursor_ResizeAll: win32_cursor = IDC_SIZEALL; break; case ImGuiMouseCursor_ResizeEW: win32_cursor = IDC_SIZEWE; break; case ImGuiMouseCursor_ResizeNS: win32_cursor = IDC_SIZENS; break; case ImGuiMouseCursor_ResizeNESW: win32_cursor = IDC_SIZENESW; break; case ImGuiMouseCursor_ResizeNWSE: win32_cursor = IDC_SIZENWSE; break; case ImGuiMouseCursor_Hand: win32_cursor = IDC_HAND; break; } ::SetCursor(::LoadCursor(NULL, win32_cursor)); } return true; } static void ImGui_ImplWin32_UpdateMousePos() { ImGuiIO& io = ImGui::GetIO(); // Set OS mouse position if requested (rarely used, only when ImGuiConfigFlags_NavEnableSetMousePos is enabled by user) if (io.WantSetMousePos) { POINT pos = { (int)io.MousePos.x, (int)io.MousePos.y }; ::ClientToScreen(g_hWnd, &pos); ::SetCursorPos(pos.x, pos.y); } // Set mouse position io.MousePos = ImVec2(-FLT_MAX, -FLT_MAX); POINT pos; if (::GetActiveWindow() == g_hWnd && ::GetCursorPos(&pos)) if (::ScreenToClient(g_hWnd, &pos)) io.MousePos = ImVec2((float)pos.x, (float)pos.y); } void ImGui_ImplWin32_NewFrame() { ImGuiIO& io = ImGui::GetIO(); // Setup display size (every frame to accommodate for window resizing) RECT rect; ::GetClientRect(g_hWnd, &rect); io.DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top)); // Setup time step INT64 current_time; ::QueryPerformanceCounter((LARGE_INTEGER *)¤t_time); io.DeltaTime = (float)(current_time - g_Time) / g_TicksPerSecond; g_Time = current_time; // Read keyboard modifiers inputs io.KeyCtrl = (::GetKeyState(VK_CONTROL) & 0x8000) != 0; io.KeyShift = (::GetKeyState(VK_SHIFT) & 0x8000) != 0; io.KeyAlt = (::GetKeyState(VK_MENU) & 0x8000) != 0; io.KeySuper = false; // io.KeysDown[], io.MousePos, io.MouseDown[], io.MouseWheel: filled by the WndProc handler below. // Update OS mouse position ImGui_ImplWin32_UpdateMousePos(); // Update OS mouse cursor with the cursor requested by imgui ImGuiMouseCursor mouse_cursor = io.MouseDrawCursor ? ImGuiMouseCursor_None : ImGui::GetMouseCursor(); if (g_LastMouseCursor != mouse_cursor) { g_LastMouseCursor = mouse_cursor; ImGui_ImplWin32_UpdateMouseCursor(); } } // Allow compilation with old Windows SDK. MinGW doesn't have default _WIN32_WINNT/WINVER versions. #ifndef WM_MOUSEHWHEEL #define WM_MOUSEHWHEEL 0x020E #endif // Process Win32 mouse/keyboard inputs. // You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs. // - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application. // - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application. // Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags. // PS: In this Win32 handler, we use the capture API (GetCapture/SetCapture/ReleaseCapture) to be able to read mouse coordinations when dragging mouse outside of our window bounds. // PS: We treat DBLCLK messages as regular mouse down messages, so this code will work on windows classes that have the CS_DBLCLKS flag set. Our own example app code doesn't set this flag. IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) { if (ImGui::GetCurrentContext() == NULL) return 0; ImGuiIO& io = ImGui::GetIO(); switch (msg) { case WM_LBUTTONDOWN: case WM_LBUTTONDBLCLK: case WM_RBUTTONDOWN: case WM_RBUTTONDBLCLK: case WM_MBUTTONDOWN: case WM_MBUTTONDBLCLK: { int button = 0; if (msg == WM_LBUTTONDOWN || msg == WM_LBUTTONDBLCLK) button = 0; if (msg == WM_RBUTTONDOWN || msg == WM_RBUTTONDBLCLK) button = 1; if (msg == WM_MBUTTONDOWN || msg == WM_MBUTTONDBLCLK) button = 2; if (!ImGui::IsAnyMouseDown() && ::GetCapture() == NULL) ::SetCapture(hwnd); io.MouseDown[button] = true; return 0; } case WM_LBUTTONUP: case WM_RBUTTONUP: case WM_MBUTTONUP: { int button = 0; if (msg == WM_LBUTTONUP) button = 0; if (msg == WM_RBUTTONUP) button = 1; if (msg == WM_MBUTTONUP) button = 2; io.MouseDown[button] = false; if (!ImGui::IsAnyMouseDown() && ::GetCapture() == hwnd) ::ReleaseCapture(); return 0; } case WM_MOUSEWHEEL: io.MouseWheel += (float)GET_WHEEL_DELTA_WPARAM(wParam) / (float)WHEEL_DELTA; return 0; case WM_MOUSEHWHEEL: io.MouseWheelH += (float)GET_WHEEL_DELTA_WPARAM(wParam) / (float)WHEEL_DELTA; return 0; case WM_KEYDOWN: case WM_SYSKEYDOWN: if (wParam < 256) io.KeysDown[wParam] = 1; return 0; case WM_KEYUP: case WM_SYSKEYUP: if (wParam < 256) io.KeysDown[wParam] = 0; return 0; case WM_CHAR: // You can also use ToAscii()+GetKeyboardState() to retrieve characters. if (wParam > 0 && wParam < 0x10000) io.AddInputCharacter((unsigned short)wParam); return 0; case WM_SETCURSOR: if (LOWORD(lParam) == HTCLIENT && ImGui_ImplWin32_UpdateMouseCursor()) return 1; return 0; } return 0; } a id='n230' href='#n230'>230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 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/* GCC back-end for ortho
  Copyright (C) 2002-1014 Tristan Gingold and al.

  GHDL 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 2, or (at your option) any later
  version.

  GHDL 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 COPYING.  If not, write to the Free
  Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  02111-1307, USA.  */

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "hash-set.h"
#include "machmode.h"
#include "vec.h"
#include "double-int.h"
#include "input.h"
#include "alias.h"
#include "symtab.h"
#include "wide-int.h"
#include "inchash.h"
#include "real.h"
#include "tree.h"

#include "bitmap.h"
#include "hash-map.h"
#include "is-a.h"
#include "plugin-api.h"
#include "hard-reg-set.h"
#include "input.h"
#include "function.h"
#include "ipa-ref.h"
#include "cgraph.h"

#include "fold-const.h"

#include <stddef.h>
#include <math.h>

#include "tm_p.h"
#include "defaults.h"
#include "ggc.h"
#include "diagnostic.h"
#include "langhooks.h"
#include "langhooks-def.h"
#include "toplev.h"
#include "opts.h"
#include "options.h"
#include "tree-iterator.h"
#include "target.h"
#include "convert.h"
#include "tree-pass.h"
#include "tree-dump.h"

#include "print-tree.h"
#include "stringpool.h"
#include "stor-layout.h"
#include "varasm.h"

/* Returns the number of FIELD_DECLs in TYPE.
   Copied here from expr.c in gcc4.9 as it is no longer exported by tree.h.  */

static int
fields_length (const_tree type)
{
  tree t = TYPE_FIELDS (type);
  int count = 0;

  for (; t; t = DECL_CHAIN (t))
    if (TREE_CODE (t) == FIELD_DECL)
      ++count;

  return count;
}

/* TODO:
 * remove stmt_list_stack, save in if/case/loop block
 * Re-add -v (if necessary)
 */

static tree type_for_size (unsigned int precision, int unsignedp);

const int tree_identifier_size = sizeof (struct tree_identifier);

struct GTY(()) binding_level
{
  /*  The BIND_EXPR node for this binding.  */
  tree bind;

  /*  The BLOCK node for this binding.  */
  tree block;

  /*  If true, stack must be saved (alloca is used).  */
  int save_stack;

  /*  Parent binding level.  */
  struct binding_level *prev;

  /*  Decls in this binding.  */
  tree first_decl;
  tree last_decl;

  /*  Blocks in this binding.  */
  tree first_block;
  tree last_block;

  /* Statements list containing the binding. */
  tree prev_stmts;
};

/*  The current binding level.  */
static GTY(()) struct binding_level *cur_binding_level = NULL;

/*  Chain of unused binding levels.  */
static GTY(()) struct binding_level *old_binding_levels = NULL;

/*  Chain of statements currently generated.  */
static GTY(()) tree cur_stmts = NULL_TREE;

enum binding_kind { GLOBAL_BINDING, FUNCTION_BINDING, LOCAL_BINDING };

static void
push_binding (enum binding_kind kind)
{
  struct binding_level *res;

  /* Get a binding level (old ones are recycled).  */
  if (old_binding_levels == NULL)
    res = ggc_alloc<binding_level> ();
  else
    {
      res = old_binding_levels;
      old_binding_levels = res->prev;
    }

  /* Init.  */
  res->first_decl = NULL_TREE;
  res->last_decl = NULL_TREE;

  res->first_block = NULL_TREE;
  res->last_block = NULL_TREE;

  res->save_stack = 0;

  switch (kind)
    {
    case GLOBAL_BINDING:
      res->bind = NULL_TREE;
      res->block = NULL_TREE;
      res->prev = NULL;
      res->prev_stmts = NULL;
      break;
    case FUNCTION_BINDING:
    case LOCAL_BINDING:
      res->block = make_node (BLOCK);
      TREE_USED (res->block) = true;
      res->bind = build3 (BIND_EXPR, void_type_node,
			  NULL_TREE, NULL_TREE, res->block);
      TREE_SIDE_EFFECTS (res->bind) = true;
      res->prev_stmts = cur_stmts;
      cur_stmts = alloc_stmt_list ();
      break;
    }

  switch (kind)
    {
    case GLOBAL_BINDING:
      /* No supercontext for the global binding.  */
      break;
    case FUNCTION_BINDING:
      /* No containing block.  */
      BLOCK_SUPERCONTEXT (res->block) = current_function_decl;
      break;
    case LOCAL_BINDING:
      /* Append the block created.  */
      if (cur_binding_level->first_block == NULL)
	cur_binding_level->first_block = res->block;
      else
	BLOCK_CHAIN (cur_binding_level->last_block) = res->block;
      cur_binding_level->last_block = res->block;

      BLOCK_SUPERCONTEXT (res->block) = cur_binding_level->block;
      break;
    }

  /* Chain previous binding, set current binding.  */
  res->prev = cur_binding_level;
  cur_binding_level = res;
}

static tree
pushdecl (tree decl)
{
  /* Set context (always a function or NULL if top-level).  */
  DECL_CONTEXT (decl) = current_function_decl;

  /* Chain the declaration.  */
  if (cur_binding_level->first_decl == NULL)
    cur_binding_level->first_decl = decl;
  else
    TREE_CHAIN (cur_binding_level->last_decl) = decl;
  cur_binding_level->last_decl = decl;

  return decl;
}

static tree
pop_binding (void)
{
  tree res;
  struct binding_level *cur;

  cur = cur_binding_level;
  res = cur->bind;

  if (cur->save_stack)
    {
      tree tmp_var;
      tree save;
      tree save_call;
      tree restore;
      tree t;

      /* Create an artificial var to save the stack pointer.  */
      tmp_var = build_decl (input_location, VAR_DECL, NULL, ptr_type_node);
      DECL_ARTIFICIAL (tmp_var) = true;
      DECL_IGNORED_P (tmp_var) = true;
      TREE_USED (tmp_var) = true;
      pushdecl (tmp_var);

      /* Create the save stmt.  */
      save_call = build_call_expr
	(builtin_decl_implicit (BUILT_IN_STACK_SAVE), 0);
      save = build2 (MODIFY_EXPR, ptr_type_node, tmp_var, save_call);
      TREE_SIDE_EFFECTS (save) = true;

      /* Create the restore stmt.  */
      restore = build_call_expr
	(builtin_decl_implicit (BUILT_IN_STACK_RESTORE), 1, tmp_var);

      /* Build a try-finally block.
	 The statement list is the block of current statements.  */
      t = build2 (TRY_FINALLY_EXPR, void_type_node, cur_stmts, NULL_TREE);
      TREE_SIDE_EFFECTS (t) = true;

      /* The finally block is the restore stmt.  */
      append_to_statement_list (restore, &TREE_OPERAND (t, 1));

      /* The body of the BIND_BLOCK is the save stmt, followed by the
	 try block.  */
      BIND_EXPR_BODY (res) = NULL_TREE;
      append_to_statement_list (save, &BIND_EXPR_BODY (res));
      append_to_statement_list (t, &BIND_EXPR_BODY (res));
    }
  else
    {
      /* The body of the BIND_BLOCK is the statement block.  */
      BIND_EXPR_BODY (res) = cur_stmts;
    }
  BIND_EXPR_VARS (res) = cur->first_decl;

  BLOCK_SUBBLOCKS (cur->block) = cur->first_block;
  BLOCK_VARS (cur->block) = cur->first_decl;

  /* Set current statements list and current binding.  */
  cur_stmts = cur->prev_stmts;
  cur_binding_level = cur->prev;

  /* Put removed binding to the recycle list.  */
  cur->prev = old_binding_levels;
  old_binding_levels = cur;

  return res;
}

static void
append_stmt (tree stmt)
{
  /* Set location (if not done).  */
  if (!EXPR_HAS_LOCATION (stmt))
    SET_EXPR_LOCATION (stmt, input_location);

  TREE_SIDE_EFFECTS (stmt) = true;
  append_to_statement_list (stmt, &cur_stmts);
}

static GTY(()) tree stack_alloc_function_ptr;

static bool
global_bindings_p (void)
{
  return cur_binding_level->prev == NULL;
}

/* Return a definition for a builtin function named NAME and whose data type
   is TYPE.  TYPE should be a function type with argument types.
   FUNCTION_CODE tells later passes how to compile calls to this function.
   See tree.h for its possible values.  */
static void
define_builtin (const char *name,
		tree type,
		enum built_in_function code,
		const char *library_name,
		int attr)
{
  tree decl;

  decl = add_builtin_function (name, type, code, BUILT_IN_NORMAL,
			       library_name, NULL_TREE);
  set_call_expr_flags (decl, attr);

  set_builtin_decl (code, decl, true);
}

static REAL_VALUE_TYPE fp_const_m_p5; /* -0.5 */

static bool
ortho_init (void)
{
  tree n;

  input_location = BUILTINS_LOCATION;

  /* Create a global binding.  Don't use push_binding, as neither a BLOCK nor
     a BIND_EXPR are needed.  */
  push_binding (GLOBAL_BINDING);

  build_common_tree_nodes (false);

  n = build_decl (input_location,
                  TYPE_DECL, get_identifier ("int"), integer_type_node);
  pushdecl (n);
  n = build_decl (input_location,
                  TYPE_DECL, get_identifier ("char"), char_type_node);
  pushdecl (n);

  /* Create alloca builtin.  */
  {
    tree args_type = tree_cons (NULL_TREE, size_type_node, void_list_node);
    tree func_type = build_function_type (ptr_type_node, args_type);

    define_builtin ("__builtin_alloca", func_type,
		    BUILT_IN_ALLOCA, NULL, 0);

    stack_alloc_function_ptr = build1
      (ADDR_EXPR,
       build_pointer_type (func_type),
       builtin_decl_implicit (BUILT_IN_ALLOCA));
  }

  {
    tree ptr_ftype = build_function_type (ptr_type_node, NULL_TREE);

    define_builtin ("__builtin_stack_save", ptr_ftype,
		    BUILT_IN_STACK_SAVE, NULL, 0);
  }

  {
    tree ftype_ptr = build_function_type_list (void_type_node,
					       ptr_type_node, NULL_TREE);

    define_builtin ("__builtin_stack_restore", ftype_ptr,
		    BUILT_IN_STACK_RESTORE, NULL, 0);
  }

  {
    tree ftype_ptr = build_function_type_list (void_type_node, NULL_TREE);

    define_builtin ("__builtin_trap", ftype_ptr,
		    BUILT_IN_TRAP, NULL, ECF_NOTHROW | ECF_LEAF);
    TREE_THIS_VOLATILE (builtin_decl_explicit (BUILT_IN_TRAP)) = 1;
  }

  fp_const_m_p5 = real_value_negate (&dconsthalf);

  build_common_builtin_nodes ();
  // FIXME: this MAY remove the need for creating the builtins above...
  // Evaluate tree.c / build_common_builtin_nodes (); for each in turn.

  return true;
}

static void
ortho_finish (void)
{
}

static unsigned int
ortho_option_lang_mask (void)
{
  return CL_vhdl;
}

static bool
ortho_post_options (const char **pfilename)
{
  if (*pfilename == NULL || strcmp (*pfilename, "-") == 0)
    *pfilename = "*stdin*";

  /* Default hook.  */
  lhd_post_options (pfilename);

  /* Run the back-end.  */
  return false;
}

extern "C" int lang_handle_option (const char *opt, const char *arg);

static bool
ortho_handle_option (size_t code, const char *arg,
		     HOST_WIDE_INT value ATTRIBUTE_UNUSED,
		     int kind ATTRIBUTE_UNUSED,
                     location_t loc ATTRIBUTE_UNUSED,
                     const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED)
{
  const char *opt;

  opt = cl_options[code].opt_text;

  switch (code)
    {
    case OPT__elab:
    case OPT_l:
    case OPT_c:
    case OPT__anaelab:
      /* Only a few options have a real arguments.  */
      return lang_handle_option (opt, arg) != 0;
    default:
      /* The other options must have a joint argument.  */
      if (arg != NULL)
	{
	  size_t len1;
	  size_t len2;
	  char *nopt;

	  len1 = strlen (opt);
	  len2 = strlen (arg);
	  nopt = (char *) alloca (len1 + len2 + 1);
	  memcpy (nopt, opt, len1);
	  memcpy (nopt + len1, arg, len2);
	  nopt[len1 + len2] = 0;
	  opt = nopt;
	}
      return lang_handle_option (opt, NULL) != 0;
    }
}

extern "C" int lang_parse_file (const char *filename);

static void
ortho_parse_file (void)
{
  const char *filename;
  const char *dbg_filename;

  if (num_in_fnames == 0)
    filename = NULL;
  else
    filename = in_fnames[0];

  /* Use absolute filenames for debug info.  Works better than relative
     filenames with some debuggers/tools.  */
  if (filename == NULL)
    dbg_filename = "*stdin*";
  else if (IS_ABSOLUTE_PATH (filename))
    dbg_filename = filename;
  else
    dbg_filename = concat (getpwd (), "/", filename, NULL);

  linemap_add (line_table, LC_ENTER, 0, dbg_filename, 1);
  input_location = linemap_line_start (line_table, 1, 252);

  if (!lang_parse_file (filename))
    errorcount++;
  linemap_add (line_table, LC_LEAVE, 0, NULL, 1);
}

/*  Called by the back-end or by the front-end when the address of EXP
    must be taken.
    This function should found the base object (if any), and mark it as
    addressable (via TREE_ADDRESSABLE).  It may emit a warning if this
    object cannot be addressable (front-end restriction).
    Returns TRUE in case of success, FALSE in case of failure.
    Note that the status is never checked by the back-end.  */
static bool
ortho_mark_addressable (tree exp)
{
  tree n;

  n = exp;

  while (1)
    switch (TREE_CODE (n))
      {
      case VAR_DECL:
      case CONST_DECL:
      case PARM_DECL:
      case RESULT_DECL:
	TREE_ADDRESSABLE (n) = true;
	return true;

      case COMPONENT_REF:
      case ARRAY_REF:
      case ARRAY_RANGE_REF:
	n = TREE_OPERAND (n, 0);
	break;

      case FUNCTION_DECL:
      case CONSTRUCTOR:
	TREE_ADDRESSABLE (n) = true;
	return true;

      case INDIRECT_REF:
	return true;

      default:
	gcc_unreachable ();
      }
}

static tree
ortho_truthvalue_conversion (tree expr)
{
  tree expr_type;
  tree t;
  tree f;

  expr_type = TREE_TYPE (expr);
  if (TREE_CODE (expr_type) != BOOLEAN_TYPE)
    {
      t = integer_one_node;
      f = integer_zero_node;
    }
  else
    {
      f = TYPE_MIN_VALUE (expr_type);
      t = TYPE_MAX_VALUE (expr_type);
    }


  switch (TREE_CODE (expr))
    {
    case EQ_EXPR:
    case NE_EXPR:
    case LE_EXPR:
    case GE_EXPR:
    case LT_EXPR:
    case GT_EXPR:
    case TRUTH_ANDIF_EXPR:
    case TRUTH_ORIF_EXPR:
    case TRUTH_AND_EXPR:
    case TRUTH_OR_EXPR:
    case ERROR_MARK:
      return expr;

    case INTEGER_CST:
      /* Not 0 is true.  */
      return integer_zerop (expr) ? f : t;

    case REAL_CST:
      return real_zerop (expr) ? f : t;

    default:
      gcc_unreachable ();
    }
}

/* Do not deal with alias set.  In particular, it doesn't work well with
   incomplete type, and universal pointers are not expressed in ortho.  */

static alias_set_type
ortho_get_alias_set (tree)
{
  return 0;
}

/* The following function has been copied and modified from c-convert.c.  */

/* Change of width--truncation and extension of integers or reals--
   is represented with NOP_EXPR.  Proper functioning of many things
   assumes that no other conversions can be NOP_EXPRs.

   Conversion between integer and pointer is represented with CONVERT_EXPR.
   Converting integer to real uses FLOAT_EXPR
   and real to integer uses FIX_TRUNC_EXPR.

   Here is a list of all the functions that assume that widening and
   narrowing is always done with a NOP_EXPR:
     In convert.c, convert_to_integer.
     In c-typeck.c, build_binary_op (boolean ops), and
	c_common_truthvalue_conversion.
     In expr.c: expand_expr, for operands of a MULT_EXPR.
     In fold-const.c: fold.
     In tree.c: get_narrower and get_unwidened.  */

/* Subroutines of `convert'.  */



/* Create an expression whose value is that of EXPR,
   converted to type TYPE.  The TREE_TYPE of the value
   is always TYPE.  This function implements all reasonable
   conversions; callers should filter out those that are
   not permitted by the language being compiled.  */

tree
convert (tree type, tree expr)
{
  tree e = expr;
  enum tree_code code = TREE_CODE (type);
  const char *invalid_conv_diag;

  if (type == error_mark_node
      || expr == error_mark_node
      || TREE_TYPE (expr) == error_mark_node)
    return error_mark_node;

  if ((invalid_conv_diag
       = targetm.invalid_conversion (TREE_TYPE (expr), type)))
    {
      error (invalid_conv_diag);
      return error_mark_node;
    }

  if (type == TREE_TYPE (expr))
    return expr;

  if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (expr)))
    return fold_build1 (NOP_EXPR, type, expr);
  if (TREE_CODE (TREE_TYPE (expr)) == ERROR_MARK)
    return error_mark_node;
  if (TREE_CODE (TREE_TYPE (expr)) == VOID_TYPE || code == VOID_TYPE)
    {
      gcc_unreachable ();
    }
  if (code == INTEGER_TYPE || code == ENUMERAL_TYPE)
    return fold (convert_to_integer (type, e));
  if (code == BOOLEAN_TYPE)
    {
      tree t = ortho_truthvalue_conversion (expr);
      if (TREE_CODE (t) == ERROR_MARK)
	return t;

      /* If it returns a NOP_EXPR, we must fold it here to avoid
	 infinite recursion between fold () and convert ().  */
      if (TREE_CODE (t) == NOP_EXPR)
	return fold_build1 (NOP_EXPR, type, TREE_OPERAND (t, 0));
      else
	return fold_build1 (NOP_EXPR, type, t);
    }
  if (code == POINTER_TYPE || code == REFERENCE_TYPE)
    return fold (convert_to_pointer (type, e));
  if (code == REAL_TYPE)
    return fold (convert_to_real (type, e));

  gcc_unreachable ();
}

#ifndef MAX_BITS_PER_WORD
#define MAX_BITS_PER_WORD BITS_PER_WORD
#endif

/*  This variable keeps a table for types for each precision so that we only
    allocate each of them once. Signed and unsigned types are kept separate.
 */
static GTY(()) tree signed_and_unsigned_types[MAX_BITS_PER_WORD + 1][2];

/*  Return an integer type with the number of bits of precision given by
    PRECISION.  UNSIGNEDP is nonzero if the type is unsigned; otherwise
    it is a signed type.  */
static tree
type_for_size (unsigned int precision, int unsignedp)
{
  tree t;

  if (precision <= MAX_BITS_PER_WORD
      && signed_and_unsigned_types[precision][unsignedp] != NULL_TREE)
    return signed_and_unsigned_types[precision][unsignedp];

  if (unsignedp)
    t = make_unsigned_type (precision);
  else
    t = make_signed_type (precision);

  if (precision <= MAX_BITS_PER_WORD)
    signed_and_unsigned_types[precision][unsignedp] = t;

  return t;
}

/*  Return a data type that has machine mode MODE.  UNSIGNEDP selects
    an unsigned type; otherwise a signed type is returned.  */
static tree
type_for_mode (enum machine_mode mode, int unsignedp)
{
  scalar_int_mode int_mode;
  if (is_a <scalar_int_mode> (mode, &int_mode))
    return type_for_size (GET_MODE_BITSIZE (int_mode), unsignedp);

  if (mode == TYPE_MODE (void_type_node))
    return void_type_node;

  if (mode == TYPE_MODE (float_type_node))
    return float_type_node;

  if (mode == TYPE_MODE (double_type_node))
    return double_type_node;

  if (mode == TYPE_MODE (long_double_type_node))
    return long_double_type_node;

  return NULL_TREE;
}

#undef LANG_HOOKS_NAME
#define LANG_HOOKS_NAME "vhdl"
#undef LANG_HOOKS_IDENTIFIER_SIZE
#define LANG_HOOKS_IDENTIFIER_SIZE sizeof (struct tree_identifier)
#undef LANG_HOOKS_INIT
#define LANG_HOOKS_INIT ortho_init
#undef LANG_HOOKS_FINISH
#define LANG_HOOKS_FINISH ortho_finish
#undef LANG_HOOKS_OPTION_LANG_MASK
#define LANG_HOOKS_OPTION_LANG_MASK ortho_option_lang_mask
#undef LANG_HOOKS_HANDLE_OPTION
#define LANG_HOOKS_HANDLE_OPTION ortho_handle_option
#undef LANG_HOOKS_POST_OPTIONS
#define LANG_HOOKS_POST_OPTIONS ortho_post_options
#undef LANG_HOOKS_HONOR_READONLY
#define LANG_HOOKS_HONOR_READONLY true
#undef LANG_HOOKS_MARK_ADDRESSABLE
#define LANG_HOOKS_MARK_ADDRESSABLE ortho_mark_addressable
#undef LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION
#define LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION ortho_expand_function

#undef LANG_HOOKS_TYPE_FOR_MODE
#define LANG_HOOKS_TYPE_FOR_MODE type_for_mode
#undef LANG_HOOKS_TYPE_FOR_SIZE
#define LANG_HOOKS_TYPE_FOR_SIZE type_for_size
#undef LANG_HOOKS_PARSE_FILE
#define LANG_HOOKS_PARSE_FILE ortho_parse_file

#define pushlevel lhd_do_nothing_i
#define poplevel lhd_do_nothing_iii_return_null_tree
#define set_block lhd_do_nothing_t
#undef LANG_HOOKS_GETDECLS
#define LANG_HOOKS_GETDECLS hook_tree_void_null

#undef  LANG_HOOKS_GET_ALIAS_SET
#define LANG_HOOKS_GET_ALIAS_SET ortho_get_alias_set

struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;

union GTY((desc ("0"),
	   chain_next ("CODE_CONTAINS_STRUCT (TREE_CODE (&%h.generic), TS_COMMON) ? ((union lang_tree_node *) TREE_CHAIN (&%h.generic)) : NULL")))
  lang_tree_node
{
  union tree_node GTY((tag ("0"),
		       desc ("tree_node_structure (&%h)"))) generic;
};

/* GHDL does not use the lang_decl and lang_type.

   FIXME: the variable_size annotation here is needed because these types are
   variable-sized in some other front-ends.  Due to gengtype deficiency, the
   GTY options of such types have to agree across all front-ends.  */

struct GTY((variable_size)) lang_type { char dummy; };
struct GTY((variable_size)) lang_decl { char dummy; };

struct GTY(()) language_function
{
  char dummy;
};


extern "C" {

struct GTY(()) chain_constr_type
{
  tree first;
  tree last;
};

static void
chain_init (struct chain_constr_type *constr)
{
  constr->first = NULL_TREE;
  constr->last = NULL_TREE;
}

static void
chain_append (struct chain_constr_type *constr, tree el)
{
  if (constr->first == NULL_TREE)
    {
      gcc_assert (constr->last == NULL_TREE);
      constr->first = el;
    }
  else
    TREE_CHAIN (constr->last) = el;
  constr->last = el;
}

struct GTY(()) list_constr_type
{
  tree first;
  tree last;
};

static void
list_init (struct list_constr_type *constr)
{
  constr->first = NULL_TREE;
  constr->last = NULL_TREE;
}

static void
ortho_list_append (struct list_constr_type *constr, tree el)
{
  tree res;

  res = tree_cons (NULL_TREE, el, NULL_TREE);
  if (constr->first == NULL_TREE)
    constr->first = res;
  else
    TREE_CHAIN (constr->last) = res;
  constr->last = res;
}

enum ON_op_kind {
  /*  Not an operation; invalid.  */
  ON_Nil,

  /*  Dyadic operations.  */
  ON_Add_Ov,
  ON_Sub_Ov,
  ON_Mul_Ov,
  ON_Div_Ov,
  ON_Rem_Ov,
  ON_Mod_Ov,

  /*  Binary operations.  */
  ON_And,
  ON_Or,
  ON_Xor,

  /*  Monadic operations.  */
  ON_Not,
  ON_Neg_Ov,
  ON_Abs_Ov,

  /*  Comparaisons  */
  ON_Eq,
  ON_Neq,
  ON_Le,
  ON_Lt,
  ON_Ge,
  ON_Gt,

  ON_LAST
};

static enum tree_code ON_op_to_TREE_CODE[ON_LAST] = {
  ERROR_MARK,

  PLUS_EXPR,
  MINUS_EXPR,
  MULT_EXPR,
  ERROR_MARK,
  TRUNC_MOD_EXPR,
  FLOOR_MOD_EXPR,

  BIT_AND_EXPR,
  BIT_IOR_EXPR,
  BIT_XOR_EXPR,

  BIT_NOT_EXPR,
  NEGATE_EXPR,
  ABS_EXPR,

  EQ_EXPR,
  NE_EXPR,
  LE_EXPR,
  LT_EXPR,
  GE_EXPR,
  GT_EXPR,
};

tree
new_dyadic_op (enum ON_op_kind kind, tree left, tree right)
{
  tree left_type;
  enum tree_code code;

  /* Truncate to avoid representations issue.  */
  kind = (enum ON_op_kind)((unsigned)kind & 0xff);

  left_type = TREE_TYPE (left);
  gcc_assert (left_type == TREE_TYPE (right));

  switch (kind)
    {
    case ON_Div_Ov:
      if (TREE_CODE (left_type) == REAL_TYPE)
	code = RDIV_EXPR;
      else
	code = TRUNC_DIV_EXPR;
      break;
    default:
      code = ON_op_to_TREE_CODE[kind];
      break;
    }
  return build2 (code, left_type, left, right);
}

tree
new_monadic_op (enum ON_op_kind kind, tree operand)
{
  /* Truncate to avoid representations issue.  */
  kind = (enum ON_op_kind)((unsigned)kind & 0xff);

  return build1 (ON_op_to_TREE_CODE[kind], TREE_TYPE (operand), operand);
}

tree
new_compare_op (enum ON_op_kind kind, tree left, tree right, tree ntype)
{
  gcc_assert (TREE_CODE (ntype) == BOOLEAN_TYPE);
  gcc_assert (TREE_TYPE (left) == TREE_TYPE (right));

  /* Truncate to avoid representations issue.  */
  kind = (enum ON_op_kind)((unsigned)kind & 0xff);

  return build2 (ON_op_to_TREE_CODE[kind], ntype, left, right);
}

tree
new_convert_ov (tree val, tree rtype)
{
  tree val_type;
  enum tree_code val_code;
  enum tree_code rtype_code;
  enum tree_code code;

  val_type = TREE_TYPE (val);
  if (val_type == rtype)
    return val;

  /*  FIXME: check conversions.  */
  val_code = TREE_CODE (val_type);
  rtype_code = TREE_CODE (rtype);
  if (val_code == POINTER_TYPE && rtype_code == POINTER_TYPE)
    code = NOP_EXPR;
  else if (val_code == INTEGER_TYPE && rtype_code == INTEGER_TYPE)
    code = CONVERT_EXPR;
  else if (val_code == REAL_TYPE && rtype_code == INTEGER_TYPE)
    {
      /*  REAL to INTEGER
          Gcc only handles FIX_TRUNC_EXPR, but we need rounding.  */
      tree m_p5;
      tree p5;
      tree zero;
      tree saved;
      tree comp;
      tree adj;
      tree res;

      m_p5 = build_real (val_type, fp_const_m_p5);
      p5 = build_real (val_type, dconsthalf);
      zero = build_real (val_type, dconst0);
      saved = save_expr (val);
      comp = build2 (GE_EXPR, integer_type_node, saved, zero);
      /*  FIXME: instead of res = res + (comp ? .5 : -.5)
	  do: res = res (comp ? + : -) .5  */
      adj = build3 (COND_EXPR, val_type, comp, p5, m_p5);
      res = build2 (PLUS_EXPR, val_type, saved, adj);
      res = build1 (FIX_TRUNC_EXPR, rtype, res);
      return res;
    }
  else if (val_code == INTEGER_TYPE && rtype_code == ENUMERAL_TYPE)
    code = CONVERT_EXPR;
  else if (val_code == ENUMERAL_TYPE && rtype_code == INTEGER_TYPE)
    code = CONVERT_EXPR;
  else if (val_code == INTEGER_TYPE && rtype_code == REAL_TYPE)
    code = FLOAT_EXPR;
  else if (val_code == BOOLEAN_TYPE && rtype_code == BOOLEAN_TYPE)
    code = NOP_EXPR;
  else if (val_code == BOOLEAN_TYPE && rtype_code == INTEGER_TYPE)
    code = CONVERT_EXPR;
  else if (val_code == INTEGER_TYPE && rtype_code == BOOLEAN_TYPE)
    code = NOP_EXPR;
  else if (val_code == REAL_TYPE && rtype_code == REAL_TYPE)
    code = NOP_EXPR;
  else
    gcc_unreachable ();

  return build1 (code, rtype, val);
}

tree
new_alloca (tree rtype, tree size)
{
  tree res;

  /* Must save stack except when at function level.  */
  if (cur_binding_level->prev != NULL
      && cur_binding_level->prev->prev != NULL)
    cur_binding_level->save_stack = 1;

  res = build_call_nary (ptr_type_node, stack_alloc_function_ptr,
                         1, fold_convert (size_type_node, size));
  return fold_convert (rtype, res);
}

tree
new_signed_literal (tree ltype, long long value)
{
  tree res;
  HOST_WIDE_INT lo;
  HOST_WIDE_INT hi;

  lo = value;
  hi = (value >> 1) >> (8 * sizeof (HOST_WIDE_INT) - 1);
  res = double_int_to_tree (ltype, double_int::from_pair (hi, lo));
  return res;
}

tree
new_unsigned_literal (tree ltype, unsigned long long value)
{
  tree res;
  unsigned HOST_WIDE_INT lo;
  unsigned HOST_WIDE_INT hi;

  lo = value;
  hi = (value >> 1) >> (8 * sizeof (HOST_WIDE_INT) - 1);
  res = double_int_to_tree (ltype, double_int::from_pair (hi, lo));
  return res;
}

tree
new_null_access (tree ltype)
{
  tree res;

  res = build_int_cst (ltype, 0);
  return res;
}

tree
new_float_literal (tree ltype, double value)
{
  signed long long s;
  double frac;
  int ex;
  REAL_VALUE_TYPE r_sign;
  REAL_VALUE_TYPE r_exp;
  REAL_VALUE_TYPE r;
  tree res;
  HOST_WIDE_INT lo;
  HOST_WIDE_INT hi;

  frac = frexp (value, &ex);

  s = ldexp (frac, 60);
  lo = s;
  hi = (s >> 1) >> (8 * sizeof (HOST_WIDE_INT) - 1);
  real_from_integer (&r_sign, DFmode, double_int::from_pair (hi, lo), SIGNED);
  real_2expN (&r_exp, ex - 60, DFmode);
  real_arithmetic (&r, MULT_EXPR, &r_sign, &r_exp);
  res = build_real (ltype, r);
  return res;
}

struct GTY(()) o_element_list
{
  tree res;
  struct chain_constr_type chain;
};

void
new_uncomplete_record_type (tree *res)
{
  *res = make_node (RECORD_TYPE);
}

void
start_record_type (struct o_element_list *elements)
{
  elements->res = make_node (RECORD_TYPE);
  chain_init (&elements->chain);
}

void
start_uncomplete_record_type (tree res, struct o_element_list *elements)
{
  elements->res = res;
  chain_init (&elements->chain);
}

static void
new_record_union_field (struct o_element_list *list,
			tree *el,
			tree ident,
			tree etype)
{
  tree res;

  res = build_decl (input_location, FIELD_DECL, ident, etype);
  DECL_CONTEXT (res) = list->res;
  chain_append (&list->chain, res);
  *el = res;
}

void
new_record_field (struct o_element_list *list,
		  tree *el,
		  tree ident,
		  tree etype)
{
  return new_record_union_field (list, el, ident, etype);
}

void
finish_record_type (struct o_element_list *elements, tree *res)
{
  TYPE_FIELDS (elements->res) = elements->chain.first;
  layout_type (elements->res);
  *res = elements->res;

  if (TYPE_NAME (elements->res) != NULL_TREE)
    {
      /*  The type was completed.  */
      rest_of_type_compilation (elements->res, 1);
    }
}

void
start_union_type (struct o_element_list *elements)
{
  elements->res =  make_node (UNION_TYPE);
  chain_init (&elements->chain);
}

void
new_union_field (struct o_element_list *elements,
		 tree *el,
		 tree ident,
		 tree etype)
{
  return new_record_union_field (elements, el, ident, etype);
}

void
finish_union_type (struct o_element_list *elements, tree *res)
{
  TYPE_FIELDS (elements->res) = elements->chain.first;
  layout_type (elements->res);
  *res = elements->res;
}

tree
new_unsigned_type (int size)
{
  return make_unsigned_type (size);
}

tree
new_signed_type (int size)
{
  return make_signed_type (size);
}

tree
new_float_type (void)
{
  tree res;

  res = make_node (REAL_TYPE);
  TYPE_PRECISION (res) = DOUBLE_TYPE_SIZE;
  layout_type (res);
  return res;
}

tree
new_access_type (tree dtype)
{
  tree res;

  if (dtype == NULL_TREE)
    {
      res = make_node (POINTER_TYPE);
      TREE_TYPE (res) = NULL_TREE;
      /* Seems necessary.  */
      SET_TYPE_MODE (res, Pmode);
      layout_type (res);
      return res;
    }
  else
    return build_pointer_type (dtype);
}

void
finish_access_type (tree atype, tree dtype)
{
  gcc_assert (TREE_CODE (atype) == POINTER_TYPE
	      && TREE_TYPE (atype) == NULL_TREE);

  TREE_TYPE (atype) = dtype;
}

tree
new_array_type (tree el_type, tree index_type)
{
  return build_array_type (el_type, index_type);
}


tree
new_constrained_array_type (tree atype, tree length)
{
  tree range_type;
  tree index_type;
  tree len;
  tree one;
  tree res;

  index_type = TYPE_DOMAIN (atype);
  if (integer_zerop (length))
    {
      /*  Handle null array, by creating a one-length array...  */
      len = size_zero_node;
    }
  else
    {
      one = build_int_cstu (index_type, 1);
      len = build2 (MINUS_EXPR, index_type, length, one);
      len = fold (len);
    }

  range_type = build_range_type (index_type, size_zero_node, len);
  res = build_array_type (TREE_TYPE (atype), range_type);

  /* Constrained arrays are *always* a subtype of its array type.
     Just copy alias set.  */
  TYPE_ALIAS_SET (res) = get_alias_set (atype);
  return res;
}

void
new_boolean_type (tree *res,
		  tree false_id ATTRIBUTE_UNUSED, tree *false_e,
		  tree true_id ATTRIBUTE_UNUSED, tree *true_e)
{
  *res = make_node (BOOLEAN_TYPE);
  TYPE_PRECISION (*res) = 1;
  fixup_unsigned_type (*res);
  *false_e = TYPE_MIN_VALUE (*res);
  *true_e = TYPE_MAX_VALUE (*res);
}

struct o_enum_list
{
  tree res;
  struct chain_constr_type chain;
  int num;
  int size;
};

void
start_enum_type (struct o_enum_list *list, int size)
{
  list->res = make_node (ENUMERAL_TYPE);
  /* Set precision and sign now, as this is used to normalize literals.  */
  TYPE_PRECISION (list->res) = size;
  TYPE_UNSIGNED (list->res) = 1;
  chain_init (&list->chain);
  list->num = 0;
  list->size = size;
}

void
new_enum_literal (struct o_enum_list *list, tree ident, tree *res)
{
  *res = build_int_cstu (list->res, (HOST_WIDE_INT)(list->num));
  chain_append (&list->chain, tree_cons (ident, *res, NULL_TREE));
  list->num++;
}

void
finish_enum_type (struct o_enum_list *list, tree *res)
{
  *res = list->res;
  TYPE_VALUES (*res) = list->chain.first;
  set_min_and_max_values_for_integral_type (*res, list->size, UNSIGNED);
  layout_type (*res);
}

struct GTY(()) o_record_aggr_list
{
  /* Type of the record.  */
  tree atype;
  /* Type of the next field to be added.  */
  tree field;
  /* Vector of elements.  */
  // VEC(constructor_elt,gc) *elts;
  vec<constructor_elt,va_gc> *elts;
};

void
start_record_aggr (struct o_record_aggr_list *list, tree atype)
{
  list->atype = atype;
  list->field = TYPE_FIELDS (atype);
  //list->elts = VEC_alloc (constructor_elt, gc, fields_length (atype));
  vec_alloc(list->elts, fields_length (atype));
}

void
new_record_aggr_el (struct o_record_aggr_list *list, tree value)
{
  CONSTRUCTOR_APPEND_ELT (list->elts, list->field, value);
  list->field = TREE_CHAIN (list->field);
}

void
finish_record_aggr (struct o_record_aggr_list *list, tree *res)
{
  *res = build_constructor (list->atype, list->elts);
}

struct GTY(()) o_array_aggr_list
{
  tree atype;
  /* Vector of elements.  */
  vec<constructor_elt,va_gc> *elts;
};

void
start_array_aggr (struct o_array_aggr_list *list, tree atype)
{
  tree nelts;
  unsigned HOST_WIDE_INT n;

  list->atype = atype;
  list->elts = NULL;

  nelts = array_type_nelts (atype);
  gcc_assert (nelts != NULL_TREE && tree_fits_uhwi_p (nelts));

  n = tree_to_uhwi (nelts) + 1;
  vec_alloc(list->elts, n);
}

void
new_array_aggr_el (struct o_array_aggr_list *list, tree value)
{
  CONSTRUCTOR_APPEND_ELT (list->elts, NULL_TREE, value);
}

void
finish_array_aggr (struct o_array_aggr_list *list, tree *res)
{
  *res = build_constructor (list->atype, list->elts);
}

tree
new_union_aggr (tree atype, tree field, tree value)
{
  tree res;

  res = build_constructor_single (atype, field, value);
  TREE_CONSTANT (res) = 1;
  return res;
}

tree
new_default_value (tree atype)
{
  return build_constructor (atype, NULL);
}

tree
new_indexed_element (tree arr, tree index)
{
  ortho_mark_addressable (arr);
  return build4 (ARRAY_REF, TREE_TYPE (TREE_TYPE (arr)),
		 arr, index, NULL_TREE, NULL_TREE);
}

tree
new_slice (tree arr, tree res_type, tree index)
{
  gcc_assert (TREE_CODE (res_type) == ARRAY_TYPE);

  ortho_mark_addressable (arr);
  return build4 (ARRAY_RANGE_REF, res_type, arr, index, NULL_TREE, NULL_TREE);
}

tree
new_selected_element (tree rec, tree el)
{
  tree res;

  gcc_assert (RECORD_OR_UNION_TYPE_P (TREE_TYPE (rec)));

  res = build3 (COMPONENT_REF, TREE_TYPE (el), rec, el, NULL_TREE);
  return res;
}

tree
new_access_element (tree acc)
{
  tree acc_type;

  acc_type = TREE_TYPE (acc);
  gcc_assert (TREE_CODE (acc_type) == POINTER_TYPE);

  return build1 (INDIRECT_REF, TREE_TYPE (acc_type), acc);
}

tree
new_offsetof (tree rec_type, tree field, tree rtype)
{
  tree off;
  tree bit_off;
  HOST_WIDE_INT pos;
  tree res;

  gcc_assert (DECL_CONTEXT (field) == rec_type);

  off = DECL_FIELD_OFFSET (field);

  /*  The offset must be a constant.  */
  gcc_assert (tree_fits_uhwi_p (off));

  bit_off = DECL_FIELD_BIT_OFFSET (field);

  /*  The offset must be a constant.  */
  gcc_assert (tree_fits_uhwi_p (bit_off));

  pos = TREE_INT_CST_LOW (off)
        + (TREE_INT_CST_LOW (bit_off) / BITS_PER_UNIT);
  res = build_int_cstu (rtype, pos);
  return res;
}

tree
new_sizeof (tree atype, tree rtype)
{
 tree size;

 size = TYPE_SIZE_UNIT (atype);

 return fold (build1 (NOP_EXPR, rtype, size));
}

tree
new_alignof (tree atype, tree rtype)
{
  return build_int_cstu (rtype, TYPE_ALIGN_UNIT (atype));
}

static tree
ortho_build_addr (tree lvalue, tree atype)
{
  tree res;

  if (TREE_CODE (lvalue) == INDIRECT_REF)
    {
      /* ADDR_REF(INDIRECT_REF(x)) -> x.  */
      res = TREE_OPERAND (lvalue, 0);
    }
  else
    {
      tree ptr_type;

      /* &base[off] -> base+off.  */
      ortho_mark_addressable (lvalue);

      if (TREE_TYPE (lvalue) != TREE_TYPE (atype))
	ptr_type = build_pointer_type (TREE_TYPE (lvalue));
      else
	ptr_type = atype;
      res = fold_build1 (ADDR_EXPR, ptr_type, lvalue);
    }

  if (TREE_TYPE (res) != atype)
    res = fold_build1 (NOP_EXPR, atype, res);

  return res;
}

tree
new_unchecked_address (tree lvalue, tree atype)
{
  return ortho_build_addr (lvalue, atype);
}

tree
new_address (tree lvalue, tree atype)
{
  return ortho_build_addr (lvalue, atype);
}

tree
new_global_address (tree lvalue, tree atype)
{
  return ortho_build_addr (lvalue, atype);
}

tree
new_global_unchecked_address (tree lvalue, tree atype)
{
  return ortho_build_addr (lvalue, atype);
}

/*  Return a pointer to function FUNC. */
static tree
build_function_ptr (tree func)
{
  return build1 (ADDR_EXPR,
		 build_pointer_type (TREE_TYPE (func)), func);
}

tree
new_subprogram_address (tree subprg, tree atype)
{
  return fold (build1 (NOP_EXPR, atype, build_function_ptr (subprg)));
}

tree
new_value (tree lvalue)
{
  return lvalue;
}

void
new_debug_line_decl (int line)
{
  input_location = linemap_line_start (line_table, line, 252);
}

void
new_type_decl (tree ident, tree atype)
{
  tree decl;

  TYPE_NAME (atype) = ident;
  decl = build_decl (input_location, TYPE_DECL, ident, atype);
  TYPE_STUB_DECL (atype) = decl;
  pushdecl (decl);
  /*
      if Get_TYPE_SIZE (Ttype) /= NULL_TREE then
         --  Do not generate debug info for uncompleted types.
         Rest_Of_Type_Compilation (Ttype, C_True);
      end if;
  */
}

enum o_storage { o_storage_external,
		 o_storage_public,
		 o_storage_private,
		 o_storage_local };

static void
set_storage (tree Node, enum o_storage storage)
{
  switch (storage)
    {
    case o_storage_external:
      DECL_EXTERNAL (Node) = 1;
      TREE_PUBLIC (Node) = 1;
      TREE_STATIC (Node) = 0;
      break;
    case o_storage_public:
      DECL_EXTERNAL (Node) = 0;
      TREE_PUBLIC (Node) = 1;
      TREE_STATIC (Node) = 1;
      break;
    case o_storage_private:
      DECL_EXTERNAL (Node) = 0;
      TREE_PUBLIC (Node) = 0;
      TREE_STATIC (Node) = 1;
      break;
    case o_storage_local:
      DECL_EXTERNAL (Node) = 0;
      TREE_PUBLIC (Node) = 0;
      TREE_STATIC (Node) = 0;
      break;
    }
}

void
new_const_decl (tree *res, tree ident, enum o_storage storage, tree atype)
{
  tree cst;

  cst = build_decl (input_location, VAR_DECL, ident, atype);
  set_storage (cst, storage);
  TREE_READONLY (cst) = 1;
  pushdecl (cst);
  switch (storage)
    {
    case o_storage_local:
      gcc_unreachable ();
    case o_storage_external:
      /*  We are at top level if Current_Function_Decl is null.  */
      rest_of_decl_compilation (cst, current_function_decl == NULL_TREE, 0);
      break;
    case o_storage_public:
    case o_storage_private:
      break;
    }
  *res = cst;
}

void
start_init_value (tree *decl ATTRIBUTE_UNUSED)
{
}

void
finish_init_value (tree *decl, tree val)
{
  DECL_INITIAL (*decl) = val;
  TREE_CONSTANT (val) = 1;
  TREE_STATIC (*decl) = 1;
  rest_of_decl_compilation (*decl, current_function_decl == NULL_TREE, 0);
}

void
new_var_decl (tree *res, tree ident, enum o_storage storage, tree atype)
{
  tree var;

  var = build_decl (input_location, VAR_DECL, ident, atype);
  if (current_function_decl != NULL_TREE)
    {
      /*  Local variable. */
      TREE_STATIC (var) = 0;
      DECL_EXTERNAL (var) = 0;
      TREE_PUBLIC (var) = 0;
    }
  else
    set_storage (var, storage);

  pushdecl (var);

  if (current_function_decl == NULL_TREE)
    rest_of_decl_compilation (var, 1, 0);

  *res = var;
}

struct GTY(()) o_inter_list
{
  tree ident;
  enum o_storage storage;

  /*  Return type.  */
  tree rtype;

  /*  List of parameter types.  */
  struct list_constr_type param_list;

  /*  Chain of parameters declarations.  */
  struct chain_constr_type param_chain;
};

void
start_function_decl (struct o_inter_list *interfaces,
		     tree ident,
		     enum o_storage storage,
		     tree rtype)
{
  interfaces->ident = ident;
  interfaces->storage = storage;
  interfaces->rtype = rtype;
  chain_init (&interfaces->param_chain);
  list_init (&interfaces->param_list);
}

void
start_procedure_decl (struct o_inter_list *interfaces,
		      tree ident,
		      enum o_storage storage)
{
  start_function_decl (interfaces, ident, storage, void_type_node);
}

void
new_interface_decl (struct o_inter_list *interfaces,
		    tree *res,
		    tree ident,
		    tree atype)
{
  tree r;

  r = build_decl (input_location, PARM_DECL, ident, atype);
  /* DECL_CONTEXT (Res, Xxx); */

  /*  Do type conversion: convert boolean and enums to int  */
  switch (TREE_CODE (atype))
    {
    case ENUMERAL_TYPE:
    case BOOLEAN_TYPE:
      DECL_ARG_TYPE (r) = integer_type_node;
      break;
    default:
      DECL_ARG_TYPE (r) = atype;
      break;
    }

  layout_decl (r, 0);

  chain_append (&interfaces->param_chain, r);
  ortho_list_append (&interfaces->param_list, atype);
  *res = r;
}

void
finish_subprogram_decl (struct o_inter_list *interfaces, tree *res)
{
  tree decl;
  tree result;
  tree parm;
  int is_global;

  /* Append a void type in the parameter types chain, so that the function
     is known not be have variables arguments.  */
  ortho_list_append (&interfaces->param_list, void_type_node);

  decl = build_decl (input_location, FUNCTION_DECL, interfaces->ident,
		     build_function_type (interfaces->rtype,
					  interfaces->param_list.first));
  DECL_SOURCE_LOCATION (decl) = input_location;

  is_global = current_function_decl == NULL_TREE
    || interfaces->storage == o_storage_external;
  if (is_global)
    set_storage (decl, interfaces->storage);
  else
    {
      /*  A nested subprogram.  */
      DECL_EXTERNAL (decl) = 0;
      TREE_PUBLIC (decl) = 0;
    }
  /*  The function exist in static storage. */
  TREE_STATIC (decl) = 1;
  DECL_INITIAL (decl) = error_mark_node;
  TREE_ADDRESSABLE (decl) = 1;

  /*  Declare the result.
      FIXME: should be moved in start_function_body. */
  result = build_decl (input_location,
                       RESULT_DECL, NULL_TREE, interfaces->rtype);
  DECL_RESULT (decl) = result;
  DECL_CONTEXT (result) = decl;

  DECL_ARGUMENTS (decl) = interfaces->param_chain.first;
  /* Set DECL_CONTEXT of parameters.  */
  for (parm = interfaces->param_chain.first;
       parm != NULL_TREE;
       parm = TREE_CHAIN (parm))
    DECL_CONTEXT (parm) = decl;

  pushdecl (decl);

  /* External functions are never nested.
     Remove their context, which is set by pushdecl.  */
  if (interfaces->storage == o_storage_external)
    DECL_CONTEXT (decl) = NULL_TREE;

  if (is_global)
    rest_of_decl_compilation (decl, 1, 0);

  *res = decl;
}

void
start_subprogram_body (tree func)
{
  gcc_assert (current_function_decl == DECL_CONTEXT (func));
  current_function_decl = func;

  /* The function is not anymore external.  */
  DECL_EXTERNAL (func) = 0;

  push_binding (FUNCTION_BINDING);
}

void
finish_subprogram_body (void)
{
  tree bind;
  tree func;
  tree parent;

  bind = pop_binding ();

  func = current_function_decl;

  /* Decl initial contains the BLOCK for the function.  */
  DECL_INITIAL (func) = BIND_EXPR_BLOCK (bind);

  /* The saved tree is the BIND_EXPR.  */
  DECL_SAVED_TREE (func) = bind;

  /* Initialize the RTL code for the function.  */
  allocate_struct_function (func, false);

  /* Store the end of the function.  */
  cfun->function_end_locus = input_location;

  parent = DECL_CONTEXT (func);

  if (parent != NULL)
    cgraph_node::get_create (func);
  else
    cgraph_node::finalize_function (func, false);

  current_function_decl = parent;
  set_cfun (NULL);
}


void
new_debug_line_stmt (int line)
{
  input_location = linemap_line_start (line_table, line, 252);
}

void
start_declare_stmt (void)
{
  push_binding (LOCAL_BINDING);
}

void
finish_declare_stmt (void)
{
  tree bind;

  bind = pop_binding ();
  append_stmt (bind);
}


struct GTY(()) o_assoc_list
{
  tree subprg;
  vec<tree, va_gc> *vecptr;
};

void
start_association (struct o_assoc_list *assocs, tree subprg)
{
  assocs->subprg = subprg;
  assocs->vecptr = NULL;
}

void
new_association (struct o_assoc_list *assocs, tree val)
{
  vec_safe_push(assocs->vecptr, val);
}

tree
new_function_call (struct o_assoc_list *assocs)
{
  return build_call_vec (TREE_TYPE (TREE_TYPE (assocs->subprg)),
                         build_function_ptr (assocs->subprg),
                         assocs->vecptr);
}

void
new_procedure_call (struct o_assoc_list *assocs)
{
  tree res;

  res = build_call_vec (TREE_TYPE (TREE_TYPE (assocs->subprg)),
                        build_function_ptr (assocs->subprg),
                        assocs->vecptr);
  TREE_SIDE_EFFECTS (res) = 1;
  append_stmt (res);
}

void
new_assign_stmt (tree target, tree value)
{
  tree n;

  n = build2 (MODIFY_EXPR, TREE_TYPE (target), target, value);
  TREE_SIDE_EFFECTS (n) = 1;
  append_stmt (n);
}

void
new_func_return_stmt (tree value)
{
  tree assign;
  tree stmt;
  tree res;

  res = DECL_RESULT (current_function_decl);
  assign = build2 (MODIFY_EXPR, TREE_TYPE (value), res, value);
  TREE_SIDE_EFFECTS (assign) = 1;
  stmt = build1 (RETURN_EXPR, void_type_node, assign);
  TREE_SIDE_EFFECTS (stmt) = 1;
  append_stmt (stmt);
}

void
new_proc_return_stmt (void)
{
  tree stmt;

  stmt = build1 (RETURN_EXPR, void_type_node, NULL_TREE);
  TREE_SIDE_EFFECTS (stmt) = 1;
  append_stmt (stmt);
}


struct GTY(()) o_if_block
{
  /* STATEMENT_LIST containing the if.  */
  tree prev_stmts;

  /* The COND_EXPR.  */
  tree if_stmt;
};

void
start_if_stmt (struct o_if_block *block, tree cond)
{
  tree stmt;
  tree stmts;

  stmts = alloc_stmt_list ();
  stmt = build3 (COND_EXPR, void_type_node, cond, stmts, NULL_TREE);
  append_stmt (stmt);
  block->prev_stmts = cur_stmts;
  block->if_stmt = stmt;
  cur_stmts = stmts;
}

void
new_else_stmt (struct o_if_block *block)
{
  cur_stmts = alloc_stmt_list ();
  COND_EXPR_ELSE (block->if_stmt) = cur_stmts;
}

void
finish_if_stmt (struct o_if_block *block)
{
  cur_stmts = block->prev_stmts;
}

struct GTY(()) o_snode
{
  tree beg_label;
  tree end_label;
};

/* Create an artificial label.  */
static tree
build_label (void)
{
  tree res;

  res = build_decl (input_location, LABEL_DECL, NULL_TREE, void_type_node);
  DECL_CONTEXT (res) = current_function_decl;
  DECL_ARTIFICIAL (res) = 1;
  return res;
}

void
start_loop_stmt (struct o_snode *label)
{
  tree stmt;

  label->beg_label = build_label ();

  stmt = build1 (LABEL_EXPR, void_type_node, label->beg_label);
  append_stmt (stmt);

  label->end_label = build_label ();
}

void
finish_loop_stmt (struct o_snode *label)
{
  tree stmt;

  stmt = build1 (GOTO_EXPR, void_type_node, label->beg_label);
  TREE_USED (label->beg_label) = 1;
  append_stmt (stmt);
  /*  Emit the end label only if there is a goto to it.
      (Return may be used to exit from the loop).  */
  if (TREE_USED (label->end_label))
    {
      stmt = build1 (LABEL_EXPR, void_type_node, label->end_label);
      append_stmt (stmt);
    }
}

void
new_exit_stmt (struct o_snode *l)
{
  tree stmt;

  stmt = build1 (GOTO_EXPR, void_type_node, l->end_label);
  append_stmt (stmt);
  TREE_USED (l->end_label) = 1;
}

void
new_next_stmt (struct o_snode *l)
{
  tree stmt;

  stmt = build1 (GOTO_EXPR, void_type_node, l->beg_label);
  TREE_USED (l->beg_label) = 1;
  append_stmt (stmt);
}

struct GTY(()) o_case_block
{
  tree prev_stmts;
  tree case_type;
  tree end_label;
  int add_break;
};

void
start_case_stmt (struct o_case_block *block, tree value)
{
  tree stmt;
  tree stmts;

  block->prev_stmts = cur_stmts;
  block->case_type = TREE_TYPE (value);
  block->end_label = build_label ();
  block->add_break = 0;

  stmts = alloc_stmt_list ();
  stmt = build2 (SWITCH_EXPR, block->case_type, value, stmts);
  append_stmt (stmt);
  cur_stmts = stmts;
}

void
start_choice (struct o_case_block *block)
{
  tree stmt;

  if (block->add_break)
    {
      stmt = build1 (GOTO_EXPR, block->case_type, block->end_label);
      append_stmt (stmt);

      block->add_break = 0;
    }
}

void
new_expr_choice (struct o_case_block *block ATTRIBUTE_UNUSED, tree expr)
{
  tree stmt;

  stmt = build_case_label
    (expr, NULL_TREE, create_artificial_label (input_location));
  append_stmt (stmt);
}

void
new_range_choice (struct o_case_block *block ATTRIBUTE_UNUSED,
		  tree low, tree high)
{
  tree stmt;

  stmt = build_case_label
    (low, high, create_artificial_label (input_location));
  append_stmt (stmt);
}

void
new_default_choice (struct o_case_block *block ATTRIBUTE_UNUSED)
{
  tree stmt;

  stmt = build_case_label
    (NULL_TREE, NULL_TREE, create_artificial_label (input_location));
  append_stmt (stmt);
}

void
finish_choice (struct o_case_block *block)
{
  block->add_break = 1;
}

void
finish_case_stmt (struct o_case_block *block)
{
  tree stmt;

  cur_stmts = block->prev_stmts;
  stmt = build1 (LABEL_EXPR, void_type_node, block->end_label);
  append_stmt (stmt);
}

bool
compare_identifier_string (tree id, const char *str, size_t len)
{
  if (IDENTIFIER_LENGTH (id) != len)
    return false;
  if (!memcmp (IDENTIFIER_POINTER (id), str, len))
    return true;
  else
    return false;
}

void
get_identifier_string (tree id, const char **str, int *len)
{
  *len = IDENTIFIER_LENGTH (id);
  *str = IDENTIFIER_POINTER (id);
}

// C linkage wrappers for two (now C++) functions so that
// Ada code can call them without name mangling
tree get_identifier_with_length_c (const char *c, size_t s)
{
  return get_identifier_with_length(c, s);
}

int toplev_main_c (int argc, char **argv)
{
  toplev toplev (NULL, true);
  return toplev.main(argc, argv);
}

void
debug_tree_c (tree expr)
{
  warning (OPT_Wall, "Debug tree");
  debug_tree (expr);
}

} // end extern "C"

#include "debug.h"
#include "gt-vhdl-ortho-lang.h"
#include "gtype-vhdl.h"