hash: do not insert deleted value to a hash_set

	PR lto/108330

gcc/ChangeLog:

	* lto-cgraph.cc (compute_ltrans_boundary): Do not insert
	NULL (deleleted value) to a hash_set.

gcc/testsuite/ChangeLog:

	* g++.dg/ipa/pr108830.C: New test.

diff --git a/gcc/lto-cgraph.cc b/gcc/lto-cgraph.cc
index eef5ea1d0618b637de3a6cb14a76a44f8987fb17..805c7855eb30e898894ecf0ccaa3b9cb5a45cef4 100644 (file)
--- a/gcc/lto-cgraph.cc
+++ b/gcc/lto-cgraph.cc
@@ -918,7 +918,8 @@ compute_ltrans_boundary (lto_symtab_encoder_t in_encoder)
              vec <cgraph_node *>targets
                = possible_polymorphic_call_targets
                    (edge, &final, &cache_token);
-             if (!reachable_call_targets.add (cache_token))
+             if (cache_token != NULL
+                 && !reachable_call_targets.add (cache_token))
                {
                  for (i = 0; i < targets.length (); i++)
                    {

diff --git a/gcc/testsuite/g++.dg/ipa/pr108830.C b/gcc/testsuite/g++.dg/ipa/pr108830.C
new file mode 100644 (file)
index 0000000..96656f6
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ipa/pr108830.C
@@ -0,0 +1,20 @@
+// PR lto/108330
+// { dg-do compile }
+
+class A {
+      virtual unsigned long m_fn1() const;
+        virtual int &m_fn2(unsigned long) const;
+};
+class C : A {
+public:
+      int &m_fn2(unsigned long) const;
+        unsigned long m_fn1() const;
+};
+class B {
+      void m_fn3(const A &, const int &, const C &, int &) const;
+};
+void B::m_fn3(const A &, const int &, const C &, int &) const {
+      C &a(a);
+        for (long b = 0; a.m_fn1(); b++)
+             a.m_fn2(0);
+}