diff options
Diffstat (limited to 'gcc/tree-ssa-pre.c')
| -rw-r--r-- | gcc/tree-ssa-pre.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index 2a431c96f7f..0ec3d3c7f7e 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -1489,6 +1489,45 @@ phi_translate_1 (pre_expr expr, bitmap_set_t set1, bitmap_set_t set2, PRE_EXPR_NARY (expr) = nary; new_val_id = nary->value_id; get_or_alloc_expression_id (expr); + /* When we end up re-using a value number make sure that + doesn't have unrelated (which we can't check here) + range or points-to info on it. */ + if (result + && INTEGRAL_TYPE_P (TREE_TYPE (result)) + && SSA_NAME_RANGE_INFO (result) + && ! SSA_NAME_IS_DEFAULT_DEF (result)) + { + if (! VN_INFO (result)->info.range_info) + { + VN_INFO (result)->info.range_info + = SSA_NAME_RANGE_INFO (result); + VN_INFO (result)->range_info_anti_range_p + = SSA_NAME_ANTI_RANGE_P (result); + } + if (dump_file && (dump_flags & TDF_DETAILS)) + { + fprintf (dump_file, "clearing range info of "); + print_generic_expr (dump_file, result); + fprintf (dump_file, "\n"); + } + SSA_NAME_RANGE_INFO (result) = NULL; + } + else if (result + && POINTER_TYPE_P (TREE_TYPE (result)) + && SSA_NAME_PTR_INFO (result) + && ! SSA_NAME_IS_DEFAULT_DEF (result)) + { + if (! VN_INFO (result)->info.ptr_info) + VN_INFO (result)->info.ptr_info + = SSA_NAME_PTR_INFO (result); + if (dump_file && (dump_flags & TDF_DETAILS)) + { + fprintf (dump_file, "clearing points-to info of "); + print_generic_expr (dump_file, result); + fprintf (dump_file, "\n"); + } + SSA_NAME_PTR_INFO (result) = NULL; + } } else { |