1 files changed, 175 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/java/java-gimplify.c b/gcc-4.9/gcc/java/java-gimplify.c
new file mode 100644
index 000000000..6c7a1b629
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+++ b/gcc-4.9/gcc/java/java-gimplify.c
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+/* Java(TM) language-specific gimplification routines.
+   Copyright (C) 2003-2014 Free Software Foundation, Inc.
+
+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/>. 
+
+Java and all Java-based marks are trademarks or registered trademarks
+of Sun Microsystems, Inc. in the United States and other countries.
+The Free Software Foundation is independent of Sun Microsystems, Inc.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tree.h"
+#include "java-tree.h"
+#include "dumpfile.h"
+#include "basic-block.h"
+#include "tree-ssa-alias.h"
+#include "internal-fn.h"
+#include "gimple-expr.h"
+#include "is-a.h"
+#include "gimple.h"
+#include "gimplify.h"
+
+static tree java_gimplify_block (tree);
+static enum gimplify_status java_gimplify_modify_expr (tree *);
+static enum gimplify_status java_gimplify_self_mod_expr (tree *, gimple_seq *,
+							 gimple_seq *);
+
+static void dump_java_tree (enum tree_dump_index, tree);
+
+/* Convert a Java tree to GENERIC.  */
+
+void
+java_genericize (tree fndecl)
+{
+  walk_tree (&DECL_SAVED_TREE (fndecl), java_replace_references, NULL, NULL);
+  dump_java_tree (TDI_original, fndecl);
+}
+
+/* Gimplify a Java tree.  */
+
+int
+java_gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
+{
+  enum tree_code code = TREE_CODE (*expr_p);
+
+  switch (code)
+    {
+    case BLOCK:
+      *expr_p = java_gimplify_block (*expr_p);
+      break;
+
+    case MODIFY_EXPR:
+      return java_gimplify_modify_expr (expr_p);
+
+    case POSTINCREMENT_EXPR:
+    case POSTDECREMENT_EXPR:
+    case PREINCREMENT_EXPR:
+    case PREDECREMENT_EXPR:
+      return java_gimplify_self_mod_expr (expr_p, pre_p, post_p);
+      
+    /* These should already be lowered before we get here.  */
+    case URSHIFT_EXPR:
+    case COMPARE_EXPR:
+    case COMPARE_L_EXPR:
+    case COMPARE_G_EXPR:
+      gcc_unreachable ();
+
+    default:
+      return GS_UNHANDLED;
+    }
+
+  return GS_OK;
+}
+
+static enum gimplify_status
+java_gimplify_modify_expr (tree *modify_expr_p)
+{
+  tree modify_expr = *modify_expr_p;
+  tree lhs = TREE_OPERAND (modify_expr, 0);
+  tree rhs = TREE_OPERAND (modify_expr, 1);
+  tree lhs_type = TREE_TYPE (lhs);
+
+  if (lhs_type != TREE_TYPE (rhs))
+    /* Fix up type mismatches to make legal GIMPLE.  These are
+       generated in several places, in particular null pointer
+       assignment and subclass assignment.  */
+    TREE_OPERAND (modify_expr, 1) = convert (lhs_type, rhs);
+
+  return GS_UNHANDLED;
+}
+
+/*  Special case handling for volatiles: we need to generate a barrier
+    between the reading and the writing.  */
+
+static enum gimplify_status
+java_gimplify_self_mod_expr (tree *expr_p, gimple_seq *pre_p ATTRIBUTE_UNUSED, 
+			     gimple_seq *post_p ATTRIBUTE_UNUSED)
+{
+  tree lhs = TREE_OPERAND (*expr_p, 0);
+
+  if (TREE_CODE (lhs) == COMPONENT_REF
+      && TREE_THIS_VOLATILE (TREE_OPERAND (lhs, 1)))
+    TREE_THIS_VOLATILE (lhs) = 1;
+
+  return GS_UNHANDLED;
+}
+
+    
+/* Gimplify BLOCK into a BIND_EXPR.  */
+
+static tree
+java_gimplify_block (tree java_block)
+{
+  tree decls = BLOCK_VARS (java_block);
+  tree body = BLOCK_EXPR_BODY (java_block);
+  gimple outer = gimple_current_bind_expr ();
+  tree block;
+
+  /* Don't bother with empty blocks.  */
+  if (! body)
+    return build_empty_stmt (input_location);
+
+  if (IS_EMPTY_STMT (body))
+    return body;
+
+  /* Make a proper block.  Java blocks are unsuitable for BIND_EXPR
+     because they use BLOCK_SUBBLOCKS for another purpose.  */
+  block = make_node (BLOCK);
+  BLOCK_VARS (block) = decls;
+
+  /* The TREE_USED flag on a block determines whether the debug output
+     routines generate info for the variables in that block.  */
+  TREE_USED (block) = 1;
+
+  if (outer != NULL)
+    {
+      tree b = gimple_bind_block (outer);
+      BLOCK_SUBBLOCKS (b) = chainon (BLOCK_SUBBLOCKS (b), block);
+    }
+  BLOCK_EXPR_BODY (java_block) = NULL_TREE;
+
+  return build3 (BIND_EXPR, TREE_TYPE (java_block), decls, body, block);
+}
+
+/* Dump a tree of some kind.  This is a convenience wrapper for the
+   dump_* functions in tree-dump.c.  */
+static void
+dump_java_tree (enum tree_dump_index phase, tree t)
+{
+  FILE *stream;
+  int flags;
+
+  stream = dump_begin (phase, &flags);
+  flags |= TDF_SLIM;
+  if (stream)
+    {
+      dump_node (t, flags, stream);
+      dump_end (phase, stream);
+    }
+}