modref_tree<tree_node*>::merge(modref_tree<tree_node*>*, vec<modref_parm_map,
va_heap, vl_ptr>*, modref_parm_map*, bool)
is called with modref_parm_map chain_map;
The variable has uninitialized m.parm_offset_known and it is accessed
here:
gcc/ipa-modref-tree.h:572 a.parm_offset_known &= m.parm_offset_known;
Ready to be installed after testing?
Thanks,
Martin
PR ipa/103230
gcc/ChangeLog:
* ipa-modref-tree.h (struct modref_parm_map): Add default
constructor.
* ipa-modref.c (ipa_merge_modref_summary_after_inlining): Use it.
---
gcc/ipa-modref-tree.h | 5 +++++
gcc/ipa-modref.c | 3 +--
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/gcc/ipa-modref-tree.h b/gcc/ipa-modref-tree.h
index 0a097349ebd..6796e6ecc34 100644
--- a/gcc/ipa-modref-tree.h
+++ b/gcc/ipa-modref-tree.h
@@ -287,6 +287,11 @@ struct GTY((user)) modref_base_node
struct modref_parm_map
{
+ /* Default constructor. */
+ modref_parm_map ()
+ : parm_index (MODREF_UNKNOWN_PARM), parm_offset_known (false), parm_offset ()
+ {}
+
/* Index of parameter we translate to.
Values from special_params enum are permitted too. */
int parm_index;
diff --git a/gcc/ipa-modref.c b/gcc/ipa-modref.c
index c94f0589d44..630d202d5cf 100644
--- a/gcc/ipa-modref.c
+++ b/gcc/ipa-modref.c
@@ -5020,8 +5020,7 @@ ipa_merge_modref_summary_after_inlining (cgraph_edge
*edge)
auto_vec <modref_parm_map, 32> parm_map;
modref_parm_map chain_map;
/* TODO: Once we get jump functions for static chains we could
- compute this. */
- chain_map.parm_index = MODREF_UNKNOWN_PARM;
+ compute parm_index. */
compute_parm_map (edge, &parm_map);
--
2.33.1