--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/brig/brigfrontend/brig-variable-handler.cc	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,267 @@
+/* brig-variable-handler.cc -- brig variable directive handling
+   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Contributed by Pekka Jaaskelainen <pekka.jaaskelainen@parmance.com>
+   for General Processor Tech.
+
+   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 "brig-code-entry-handler.h"
+
+#include "stringpool.h"
+#include "errors.h"
+#include "brig-machine.h"
+#include "brig-util.h"
+#include "print-tree.h"
+#include "diagnostic-core.h"
+
+tree
+brig_directive_variable_handler::build_variable
+  (const BrigDirectiveVariable *brigVar, tree_code var_decltype)
+{
+  std::string var_name = m_parent.get_mangled_name (brigVar);
+
+  bool is_definition = brigVar->modifier & BRIG_VARIABLE_DEFINITION;
+
+  tree name_identifier = get_identifier (var_name.c_str ());
+
+  tree var_decl;
+  tree t;
+  if (brigVar->type & BRIG_TYPE_ARRAY)
+    {
+      tree element_type
+	= gccbrig_tree_type_for_hsa_type (brigVar->type & ~BRIG_TYPE_ARRAY);
+      uint64_t element_count = gccbrig_to_uint64_t (brigVar->dim);
+      if (is_definition && element_count == 0)
+	fatal_error (UNKNOWN_LOCATION, "Array definition with zero elements.");
+      if (var_decltype == PARM_DECL)
+	t = build_pointer_type (element_type);
+      else
+	t = build_array_type_nelts (element_type, element_count);
+    }
+  else
+    {
+      t = gccbrig_tree_type_for_hsa_type (brigVar->type);
+    }
+
+  size_t alignment = get_brig_var_alignment (brigVar);
+
+  if (brigVar->segment == BRIG_SEGMENT_READONLY
+      || brigVar->segment == BRIG_SEGMENT_KERNARG
+      || (brigVar->modifier & BRIG_VARIABLE_CONST))
+    TYPE_READONLY (t) = 1;
+
+  TYPE_ADDR_SPACE (t) = gccbrig_get_target_addr_space_id (brigVar->segment);
+
+  var_decl = build_decl (UNKNOWN_LOCATION, var_decltype, name_identifier, t);
+
+  SET_DECL_ALIGN (var_decl, alignment * BITS_PER_UNIT);
+
+  /* Force the HSA alignments.  */
+  DECL_USER_ALIGN (var_decl) = 1;
+
+  TREE_USED (var_decl) = 1;
+
+  TREE_PUBLIC (var_decl) = 1;
+  if (is_definition)
+    DECL_EXTERNAL (var_decl) = 0;
+  else
+    DECL_EXTERNAL (var_decl) = 1; /* The definition is elsewhere.  */
+
+  if (brigVar->init != 0)
+    {
+      gcc_assert (brigVar->segment == BRIG_SEGMENT_READONLY
+		  || brigVar->segment == BRIG_SEGMENT_GLOBAL);
+
+      const BrigBase *cst_operand_data
+	= m_parent.get_brig_operand_entry (brigVar->init);
+
+      tree initializer = NULL_TREE;
+      if (cst_operand_data->kind == BRIG_KIND_OPERAND_CONSTANT_BYTES)
+	initializer = get_tree_cst_for_hsa_operand
+	  ((const BrigOperandConstantBytes *) cst_operand_data, t);
+      else
+	error ("variable initializers of type %x not implemented",
+	       cst_operand_data->kind);
+      gcc_assert (initializer != NULL_TREE);
+      DECL_INITIAL (var_decl) = initializer;
+    }
+
+  if (var_decltype == PARM_DECL)
+    {
+      DECL_ARG_TYPE (var_decl) = TREE_TYPE (var_decl);
+      DECL_EXTERNAL (var_decl) = 0;
+      TREE_PUBLIC (var_decl) = 0;
+    }
+
+  TREE_ADDRESSABLE (var_decl) = 1;
+
+  TREE_USED (var_decl) = 1;
+  DECL_NONLOCAL (var_decl) = 1;
+  DECL_ARTIFICIAL (var_decl) = 0;
+
+  return var_decl;
+}
+
+size_t
+brig_directive_variable_handler::operator () (const BrigBase *base)
+{
+  const BrigDirectiveVariable *brigVar = (const BrigDirectiveVariable *) base;
+
+  bool is_definition = brigVar->modifier & BRIG_VARIABLE_DEFINITION;
+
+  size_t var_size;
+  tree var_type;
+  if (brigVar->type & BRIG_TYPE_ARRAY)
+    {
+      tree element_type
+	= gccbrig_tree_type_for_hsa_type (brigVar->type & ~BRIG_TYPE_ARRAY);
+      uint64_t element_count = gccbrig_to_uint64_t (brigVar->dim);
+      if (is_definition && element_count == 0)
+	fatal_error (UNKNOWN_LOCATION, "Array definition with zero elements.");
+      var_type = build_array_type_nelts (element_type, element_count);
+      size_t element_size = tree_to_uhwi (TYPE_SIZE (element_type));
+      var_size = element_size * element_count / 8;
+    }
+  else
+    {
+      var_type = gccbrig_tree_type_for_hsa_type (brigVar->type);
+      var_size = tree_to_uhwi (TYPE_SIZE (var_type)) / 8;
+    }
+
+  size_t alignment = get_brig_var_alignment (brigVar);
+
+  bool function_scope = m_parent.m_cf != NULL;
+
+  if (function_scope)
+    m_parent.m_cf->m_function_scope_vars.insert (base);
+
+  std::string var_name = m_parent.get_mangled_name (brigVar);
+  if (brigVar->segment == BRIG_SEGMENT_GROUP)
+    {
+      /* Non-kernel scope group variables have been added at the
+	 'analyze' stage.  */
+      m_parent.add_group_variable (var_name, var_size, alignment,
+				   function_scope);
+      return base->byteCount;
+    }
+
+  /* During analyze, handle only (module scope) group variables.  */
+  if (m_parent.m_analyzing)
+    return base->byteCount;
+
+  if (brigVar->segment == BRIG_SEGMENT_KERNARG)
+    {
+      /* Do not create a real variable, but only a table of
+	 offsets to the kernarg segment buffer passed as the
+	 single argument by the kernel launcher for later
+	 reference.  Ignore kernel declarations.  */
+      if (m_parent.m_cf != NULL && m_parent.m_cf->m_func_decl != NULL_TREE)
+	m_parent.m_cf->append_kernel_arg (brigVar, var_size, alignment);
+      return base->byteCount;
+    }
+  else if (brigVar->segment == BRIG_SEGMENT_PRIVATE
+	   || brigVar->segment == BRIG_SEGMENT_SPILL)
+    {
+      /* Private variables are handled like group variables,
+	 except that their offsets are multiplied by the work-item
+	 flat id, when accessed.  */
+      if (!m_parent.has_private_variable (var_name))
+	m_parent.append_private_variable (var_name, var_size, alignment);
+      return base->byteCount;
+    }
+  else if (brigVar->segment == BRIG_SEGMENT_GLOBAL
+	   || brigVar->segment == BRIG_SEGMENT_READONLY)
+    {
+      tree def = is_definition ? NULL_TREE :
+	m_parent.global_variable (var_name);
+
+      if (!is_definition && def != NULL_TREE)
+	{
+	  /* We have a definition already for this declaration.
+	     Use the definition instead of the declaration.  */
+	}
+      else if (gccbrig_might_be_host_defined_var_p (brigVar))
+	{
+	  tree var_decl = build_variable (brigVar);
+	  m_parent.add_host_def_var_ptr (var_name, var_decl);
+	}
+      else
+	{
+	  tree var_decl = build_variable (brigVar);
+	  /* Make all global variables program scope for now
+	     so we can get their address from the Runtime API.  */
+	  DECL_CONTEXT (var_decl) = NULL_TREE;
+	  TREE_STATIC (var_decl) = 1;
+	  m_parent.add_global_variable (var_name, var_decl);
+	}
+    }
+  else if (brigVar->segment == BRIG_SEGMENT_ARG)
+    {
+
+      if (m_parent.m_cf->m_generating_arg_block)
+	{
+	  tree var_decl = build_variable (brigVar);
+	  tree bind_expr = m_parent.m_cf->m_current_bind_expr;
+
+	  DECL_CONTEXT (var_decl) = m_parent.m_cf->m_func_decl;
+	  DECL_CHAIN (var_decl) = BIND_EXPR_VARS (bind_expr);
+	  BIND_EXPR_VARS (bind_expr) = var_decl;
+	  TREE_PUBLIC (var_decl) = 0;
+
+	  m_parent.m_cf->add_arg_variable (brigVar, var_decl);
+	}
+      else
+	{
+	  /* Must be an incoming function argument which has
+	     been parsed in brig-function-handler.cc.  No
+	     need to generate anything here.  */
+	}
+    }
+  else
+    gcc_unreachable ();
+
+  return base->byteCount;
+}
+
+/* Returns the alignment for the given BRIG variable.  In case the variable
+   explicitly defines alignment and its larger than the natural alignment,
+   returns it instead of the natural one.  */
+
+size_t
+brig_directive_variable_handler::get_brig_var_alignment
+(const BrigDirectiveVariable *brigVar)
+{
+
+  size_t defined_alignment
+    = brigVar->align == BRIG_ALIGNMENT_NONE ? 0 : 1 << (brigVar->align - 1);
+  size_t natural_alignment;
+  if (brigVar->type & BRIG_TYPE_ARRAY)
+    {
+      tree element_type
+	= gccbrig_tree_type_for_hsa_type (brigVar->type & ~BRIG_TYPE_ARRAY);
+      size_t element_size = tree_to_uhwi (TYPE_SIZE (element_type));
+      natural_alignment = element_size / BITS_PER_UNIT;
+    }
+  else
+    {
+      tree t = gccbrig_tree_type_for_hsa_type (brigVar->type);
+      natural_alignment = tree_to_uhwi (TYPE_SIZE (t)) / BITS_PER_UNIT;
+    }
+
+  return natural_alignment > defined_alignment
+    ? natural_alignment : defined_alignment;
+}