This adds a missing guard for a pointer to the DSE modref query,
otherwise we can end up invoking APIs desired to only work on
pointers on non-pointers when there are mismatches between declared
and actual arguments of functions in the program.
2022-01-18 Richard Biener <rguenther@suse.de>
PR tree-optimization/103987
* tree-ssa-dse.cc (dse_optimize_call): Properly guard modref
query with a pointer check.
* gcc.dg/torture/pr103987.c: New testcase.
--- /dev/null
+/* { dg-do compile } */
+
+void foo();
+
+void bar(int i)
+{
+ foo (i);
+}
+
+void foo(int *p)
+{
+ *p = 0;
+}
#include "cgraph.h"
#include "ipa-modref-tree.h"
#include "ipa-modref.h"
+#include "target.h"
/* This file implements dead store elimination.
{
tree arg = access_node.get_call_arg (stmt);
- if (!arg)
+ if (!arg || !POINTER_TYPE_P (TREE_TYPE (arg)))
return false;
- if (integer_zerop (arg) && flag_delete_null_pointer_checks)
+ if (integer_zerop (arg)
+ && !targetm.addr_space.zero_address_valid
+ (TYPE_ADDR_SPACE (TREE_TYPE (arg))))
continue;
ao_ref ref;