tree-ssa-dse.c (dse_optimize_stmt): Fix up all of V_MAY_DEF and V_MUST_DEF instead of just the first_use_p.

2005-09-12  Andrew Pinski  <pinskia@physics.uc.edu>

        * tree-ssa-dse.c (dse_optimize_stmt): Fix up all of V_MAY_DEF and
        V_MUST_DEF instead of just the first_use_p.
        Don't mark the virtual variables for renaming on the statement which
        is being removed.
        (pass_dse): Remove TODO_update_ssa.

From-SVN: r104172
This commit is contained in:
Andrew Pinski 2005-09-12 13:56:07 +00:00 committed by Andrew Pinski
parent f439f9a536
commit 8d09949866
2 changed files with 14 additions and 13 deletions

View File

@ -1,3 +1,11 @@
2005-09-12 Andrew Pinski <pinskia@physics.uc.edu>
* tree-ssa-dse.c (dse_optimize_stmt): Fix up all of V_MAY_DEF and
V_MUST_DEF instead of just the first_use_p.
Don't mark the virtual variables for renaming on the statement which
is being removed.
(pass_dse): Remove TODO_update_ssa.
2005-09-12 J"orn Rennecke <joern.rennecke@st.com>
PR middle-end/23290

View File

@ -257,14 +257,9 @@ dse_optimize_stmt (struct dom_walk_data *walk_data,
&& operand_equal_p (TREE_OPERAND (stmt, 0),
TREE_OPERAND (use_stmt, 0), 0))
{
tree def;
ssa_op_iter iter;
/* Make sure we propagate the ABNORMAL bit setting. */
if (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (USE_FROM_PTR (first_use_p)))
SSA_NAME_OCCURS_IN_ABNORMAL_PHI (usevar) = 1;
/* Then we need to fix the operand of the consuming stmt. */
SET_USE (first_use_p, usevar);
if (dump_file && (dump_flags & TDF_DETAILS))
{
@ -272,16 +267,15 @@ dse_optimize_stmt (struct dom_walk_data *walk_data,
print_generic_expr (dump_file, bsi_stmt (bsi), dump_flags);
fprintf (dump_file, "'\n");
}
/* Then we need to fix the operand of the consuming stmt. */
FOR_EACH_SSA_MUST_AND_MAY_DEF_OPERAND (var1, var2, stmt, op_iter)
{
single_imm_use (DEF_FROM_PTR (var1), &use_p, &temp);
SET_USE (use_p, USE_FROM_PTR (var2));
}
/* Remove the dead store. */
bsi_remove (&bsi);
/* The virtual defs for the dead statement will need to be
updated. Since these names are going to disappear,
FUD chains for uses downstream need to be updated. */
FOR_EACH_SSA_TREE_OPERAND (def, stmt, iter, SSA_OP_VIRTUAL_DEFS)
mark_sym_for_renaming (SSA_NAME_VAR (def));
/* And release any SSA_NAMEs set in this statement back to the
SSA_NAME manager. */
release_defs (stmt);
@ -408,7 +402,6 @@ struct tree_opt_pass pass_dse = {
0, /* todo_flags_start */
TODO_dump_func
| TODO_ggc_collect
| TODO_update_ssa
| TODO_verify_ssa, /* todo_flags_finish */
0 /* letter */
};