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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-dce.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-dce.c')
| -rw-r--r-- | gcc/tree-ssa-dce.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/tree-ssa-dce.c b/gcc/tree-ssa-dce.c index d6fbe62..a710de6 100644 --- a/gcc/tree-ssa-dce.c +++ b/gcc/tree-ssa-dce.c @@ -1215,6 +1215,26 @@ remove_dead_stmt (gimple_stmt_iterator *i, basic_block bb) ei_next (&ei); } + /* If this is a store into a variable that is being optimized away, + add a debug bind stmt if possible. */ + if (MAY_HAVE_DEBUG_STMTS + && gimple_assign_single_p (stmt) + && is_gimple_val (gimple_assign_rhs1 (stmt))) + { + tree lhs = gimple_assign_lhs (stmt); + if ((TREE_CODE (lhs) == VAR_DECL || TREE_CODE (lhs) == PARM_DECL) + && !DECL_IGNORED_P (lhs) + && is_gimple_reg_type (TREE_TYPE (lhs)) + && !is_global_var (lhs) + && !DECL_HAS_VALUE_EXPR_P (lhs)) + { + tree rhs = gimple_assign_rhs1 (stmt); + gimple note + = gimple_build_debug_bind (lhs, unshare_expr (rhs), stmt); + gsi_insert_after (i, note, GSI_SAME_STMT); + } + } + unlink_stmt_vdef (stmt); gsi_remove (i, true); release_defs (stmt); |