diff options
| author | jakub <> | 2011-12-01 19:12:54 +0000 |
|---|---|---|
| committer | jakub <> | 2011-12-01 19:12:54 +0000 |
| commit | 6126c476cb72151c4871c052db7fe10da6255aa4 (patch) | |
| tree | a0a8960c1902ff04d8b319d3ba88cf5c4f64534b /gcc/tree-ssa-live.c | |
| parent | 53d86c197f0e81e9c34b463290bd8e74b49a60f0 (diff) | |
PR debug/50317
* tree-ssa-dce.c (remove_dead_stmt): Add a debug stmt when removing
as unnecessary a store to a variable with gimple reg type.
* tree-ssa-live.c (remove_unused_locals): Clear TREE_ADDRESSABLE bit
on local unreferenced variables.
* cfgexpand.c (expand_gimple_basic_block): Don't emit DEBUG_INSNs
for !target_for_debug_bind variables.
Diffstat (limited to 'gcc/tree-ssa-live.c')
| -rw-r--r-- | gcc/tree-ssa-live.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/gcc/tree-ssa-live.c b/gcc/tree-ssa-live.c index b8a056ebdac..103e4f7155a 100644 --- a/gcc/tree-ssa-live.c +++ b/gcc/tree-ssa-live.c @@ -1,5 +1,5 @@ /* Liveness for SSA trees. - Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010 + Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. Contributed by Andrew MacLeod <amacleod@redhat.com> @@ -814,7 +814,15 @@ remove_unused_locals (void) bitmap_set_bit (global_unused_vars, DECL_UID (var)); } else - continue; + { + /* For unreferenced local vars drop TREE_ADDRESSABLE + bit in case it is referenced from debug stmts. */ + if (DECL_CONTEXT (var) == current_function_decl + && TREE_ADDRESSABLE (var) + && is_gimple_reg_type (TREE_TYPE (var))) + TREE_ADDRESSABLE (var) = 0; + continue; + } } else if (TREE_CODE (var) == VAR_DECL && DECL_HARD_REGISTER (var) |