diff options
| -rw-r--r-- | gcc/analyzer/region-model-reachability.cc | 36 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/analyzer/pr97072.c | 9 |
2 files changed, 36 insertions, 9 deletions
diff --git a/gcc/analyzer/region-model-reachability.cc b/gcc/analyzer/region-model-reachability.cc index daf7852..a988ffc 100644 --- a/gcc/analyzer/region-model-reachability.cc +++ b/gcc/analyzer/region-model-reachability.cc @@ -88,20 +88,38 @@ reachable_regions::init_cluster (const region *base_reg) if (m_store->escaped_p (base_reg)) add (base_reg, true); - /* If BASE_REG is *INIT_VAL(REG) for some other REG, see if REG is - unbound and untouched. If so, then add BASE_REG as a root. */ if (const symbolic_region *sym_reg = base_reg->dyn_cast_symbolic_region ()) { const svalue *ptr = sym_reg->get_pointer (); - if (const initial_svalue *init_sval = ptr->dyn_cast_initial_svalue ()) + switch (ptr->get_kind ()) { - const region *init_sval_reg = init_sval->get_region (); - const region *other_base_reg = init_sval_reg->get_base_region (); - const binding_cluster *other_cluster - = m_store->get_cluster (other_base_reg); - if (other_cluster == NULL - || !other_cluster->touched_p ()) + default: + break; + case SK_INITIAL: + { + /* If BASE_REG is *INIT_VAL(REG) for some other REG, see if REG is + unbound and untouched. If so, then add BASE_REG as a root. */ + const initial_svalue *init_sval + = as_a <const initial_svalue *> (ptr); + const region *init_sval_reg = init_sval->get_region (); + const region *other_base_reg = init_sval_reg->get_base_region (); + const binding_cluster *other_cluster + = m_store->get_cluster (other_base_reg); + if (other_cluster == NULL + || !other_cluster->touched_p ()) + add (base_reg, true); + } + break; + + case SK_UNKNOWN: + case SK_CONJURED: + { + /* If this cluster is due to dereferencing an unknown/conjured + pointer, any values written through the pointer could still + be live. */ add (base_reg, true); + } + break; } } } diff --git a/gcc/testsuite/gcc.dg/analyzer/pr97072.c b/gcc/testsuite/gcc.dg/analyzer/pr97072.c new file mode 100644 index 0000000..4024124 --- /dev/null +++ b/gcc/testsuite/gcc.dg/analyzer/pr97072.c @@ -0,0 +1,9 @@ +void unknown_fn_1 (void *); + +void test_1 (int co, int y) +{ + void *p = __builtin_malloc (1024); + void **q; + unknown_fn_1 (&q); + *q = p; +} |