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| author | Jakub Jelinek <jakub@redhat.com> | 2011-12-01 20:12:54 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2011-12-01 20:12:54 +0100 |
| commit | ec8c1492af9156d96527104f7e7db806220e56c8 (patch) | |
| tree | a0a8960c1902ff04d8b319d3ba88cf5c4f64534b /gcc/tree-ssa-live.c | |
| parent | e411850054322167de1ae23af2b7c9b7a1ac9029 (diff) | |
| download | gcc-ec8c1492af9156d96527104f7e7db806220e56c8.zip gcc-ec8c1492af9156d96527104f7e7db806220e56c8.tar.gz gcc-ec8c1492af9156d96527104f7e7db806220e56c8.tar.bz2 | |
re PR debug/50317 (missing DW_OP_GNU_implicit_pointer)
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.
From-SVN: r181890
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 b8a056e..103e4f7 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) |