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authorAlexandre Oliva <aoliva@redhat.com>2009-05-28 06:49:37 +0000
committerAlexandre Oliva <aoliva@gcc.gnu.org>2009-05-28 06:49:37 +0000
commit89fbbe4e180bff46aa797f13cf7e04ef9bffe344 (patch)
tree7a9076943d7e759fd36b9ae5653dd380ef72e61d /gcc
parentc0ba77370f931c5f7079350a3a70475fca7d4487 (diff)
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tree-ssa-live.c (remove_unused_locals): Skip when not optimizing.
* tree-ssa-live.c (remove_unused_locals): Skip when not optimizing. Simplify other tests involving optimize. From-SVN: r147939
Diffstat (limited to 'gcc')
-rw-r--r--gcc/ChangeLog5
-rw-r--r--gcc/tree-ssa-live.c12
2 files changed, 13 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6920b5a..544c988 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2009-05-28 Alexandre Oliva <aoliva@redhat.com>
+
+ * tree-ssa-live.c (remove_unused_locals): Skip when not optimizing.
+ Simplify other tests involving optimize.
+
2009-05-27 Tom Tromey <tromey@redhat.com>
* unwind-dw2.c (_Unwind_DebugHook): New function.
diff --git a/gcc/tree-ssa-live.c b/gcc/tree-ssa-live.c
index 3c31766..a02b1c5 100644
--- a/gcc/tree-ssa-live.c
+++ b/gcc/tree-ssa-live.c
@@ -639,6 +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. */
@@ -701,8 +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))
{
@@ -761,8 +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))