2011-11-28 Jakub Jelinek <jakub@redhat.com>
+ PR tree-optimization/50078
+ * tree-ssa-forwprop.c (forward_propagate_addr_expr_1): Copy over
+ TREE_THIS_VOLATILE also from the old to new lhs resp. rhs.
+
PR tree-optimization/50682
* tree-eh.c (maybe_remove_unreachable_handlers): New function.
* tree-flow.h (maybe_remove_unreachable_handlers): New prototype.
TREE_TYPE (gimple_assign_rhs1 (use_stmt))))
{
tree *def_rhs_basep = &TREE_OPERAND (def_rhs, 0);
- tree new_offset, new_base, saved;
+ tree new_offset, new_base, saved, new_lhs;
while (handled_component_p (*def_rhs_basep))
def_rhs_basep = &TREE_OPERAND (*def_rhs_basep, 0);
saved = *def_rhs_basep;
new_base, new_offset);
TREE_THIS_VOLATILE (*def_rhs_basep) = TREE_THIS_VOLATILE (lhs);
TREE_THIS_NOTRAP (*def_rhs_basep) = TREE_THIS_NOTRAP (lhs);
- gimple_assign_set_lhs (use_stmt,
- unshare_expr (TREE_OPERAND (def_rhs, 0)));
+ new_lhs = unshare_expr (TREE_OPERAND (def_rhs, 0));
+ gimple_assign_set_lhs (use_stmt, new_lhs);
+ TREE_THIS_VOLATILE (new_lhs) = TREE_THIS_VOLATILE (lhs);
*def_rhs_basep = saved;
tidy_after_forward_propagate_addr (use_stmt);
/* Continue propagating into the RHS if this was not the
TREE_TYPE (TREE_OPERAND (def_rhs, 0))))
{
tree *def_rhs_basep = &TREE_OPERAND (def_rhs, 0);
- tree new_offset, new_base, saved;
+ tree new_offset, new_base, saved, new_rhs;
while (handled_component_p (*def_rhs_basep))
def_rhs_basep = &TREE_OPERAND (*def_rhs_basep, 0);
saved = *def_rhs_basep;
new_base, new_offset);
TREE_THIS_VOLATILE (*def_rhs_basep) = TREE_THIS_VOLATILE (rhs);
TREE_THIS_NOTRAP (*def_rhs_basep) = TREE_THIS_NOTRAP (rhs);
- gimple_assign_set_rhs1 (use_stmt,
- unshare_expr (TREE_OPERAND (def_rhs, 0)));
+ new_rhs = unshare_expr (TREE_OPERAND (def_rhs, 0));
+ gimple_assign_set_rhs1 (use_stmt, new_rhs);
+ TREE_THIS_VOLATILE (new_rhs) = TREE_THIS_VOLATILE (rhs);
*def_rhs_basep = saved;
fold_stmt_inplace (use_stmt_gsi);
tidy_after_forward_propagate_addr (use_stmt);