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Diffstat (limited to 'gcc-4.8/gcc/java/java-gimplify.c')
| -rw-r--r-- | gcc-4.8/gcc/java/java-gimplify.c | 169 | 
1 files changed, 169 insertions, 0 deletions
| diff --git a/gcc-4.8/gcc/java/java-gimplify.c b/gcc-4.8/gcc/java/java-gimplify.c new file mode 100644 index 0000000..6f159f8 --- /dev/null +++ b/gcc-4.8/gcc/java/java-gimplify.c @@ -0,0 +1,169 @@ +/* Java(TM) language-specific gimplification routines. +   Copyright (C) 2003-2013 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 "gimple.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); +    } +} | 
