diff options
Diffstat (limited to 'gcc/tree-ssa-live.c')
| -rw-r--r-- | gcc/tree-ssa-live.c | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/gcc/tree-ssa-live.c b/gcc/tree-ssa-live.c index 0673fab851f..a02b1c5209f 100644 --- a/gcc/tree-ssa-live.c +++ b/gcc/tree-ssa-live.c @@ -552,7 +552,9 @@ mark_all_vars_used (tree *expr_p, void *data) walk_tree (expr_p, mark_all_vars_used_1, data, NULL); } -/* Dump scope blocks. */ + +/* Dump scope blocks starting at SCOPE to FILE. INDENT is the + indentation level and FLAGS is as in print_generic_expr. */ static void dump_scope_block (FILE *file, int indent, tree scope, int flags) @@ -606,12 +608,26 @@ dump_scope_block (FILE *file, int indent, tree scope, int flags) fprintf (file, "\n%*s}\n",indent, ""); } + +/* Dump the tree of lexical scopes of current_function_decl to FILE. + FLAGS is as in print_generic_expr. */ + void dump_scope_blocks (FILE *file, int flags) { dump_scope_block (file, 0, DECL_INITIAL (current_function_decl), flags); } + +/* Dump the tree of lexical scopes of current_function_decl to stderr. + FLAGS is as in print_generic_expr. */ + +void +debug_scope_blocks (int flags) +{ + dump_scope_blocks (stderr, flags); +} + /* Remove local variables that are not referenced in the IL. */ void @@ -623,6 +639,12 @@ remove_unused_locals (void) var_ann_t ann; bitmap global_unused_vars = NULL; + /* Removing declarations from lexical blocks when not optimizing is + not only a waste of time, it actually causes differences in stack + layout. */ + if (!optimize) + return; + mark_scope_block_unused (DECL_INITIAL (current_function_decl)); /* Assume all locals are unused. */ @@ -685,8 +707,7 @@ remove_unused_locals (void) if (TREE_CODE (var) != FUNCTION_DECL && (!(ann = var_ann (var)) - || !ann->used) - && (optimize || DECL_ARTIFICIAL (var))) + || !ann->used)) { if (is_global_var (var)) { @@ -745,8 +766,7 @@ remove_unused_locals (void) && TREE_CODE (t) != PARM_DECL && TREE_CODE (t) != RESULT_DECL && !(ann = var_ann (t))->used - && !TREE_ADDRESSABLE (t) - && (optimize || DECL_ARTIFICIAL (t))) + && !TREE_ADDRESSABLE (t)) remove_referenced_var (t); remove_unused_scope_block_p (DECL_INITIAL (current_function_decl)); if (dump_file && (dump_flags & TDF_DETAILS)) |