PR107467 ended up being fixed by the fix for PR115110, but let's
add the testcase on top.
gcc/testsuite/ChangeLog:
PR tree-optimization/107467
PR middle-end/115110
* g++.dg/lto/pr107467_0.C: New test.
---
OK?
gcc/testsuite/g++.dg/lto/pr107467_0.C | 52 +++++++++++++++++++++++++++
1 file changed, 52 insertions(+)
create mode 100644 gcc/testsuite/g++.dg/lto/pr107467_0.C
diff --git a/gcc/testsuite/g++.dg/lto/pr107467_0.C
b/gcc/testsuite/g++.dg/lto/pr107467_0.C
new file mode 100644
index 000000000000..3a2c1c2d7ae1
--- /dev/null
+++ b/gcc/testsuite/g++.dg/lto/pr107467_0.C
@@ -0,0 +1,52 @@
+/* { dg-lto-do run } */
+/* { dg-lto-options { -O2 -fno-strict-aliasing -flto } } */
+
+template <class T>
+struct pair
+{
+ int first;
+ T second;
+};
+
+template <typename C>
+[[gnu::optimize("strict-aliasing")]]
+bool __attribute__((noinline))
+compare_pairs(const pair<C> &lhs, const pair<C> &rhs) {
+ return lhs.first == rhs.first && lhs.second == rhs.second;
+}
+
+template <typename B> struct Combined {
+ pair<B *>
+__attribute__((noinline)) get_const() {
+ return pair<B *>{123, nullptr};
+ }
+[[gnu::optimize("strict-aliasing")]]
+ bool
+__attribute__((noinline)) clashy() {
+ return compare_pairs(get_const(), get_const());
+ }
+};
+
+class SomeClass {};
+class OtherClass {};
+
+[[gnu::optimize("strict-aliasing")]]
+[[gnu::used]]
+void some_func() {
+ Combined<SomeClass> myvar;
+ __builtin_printf("%i\n", myvar.clashy());
+}
+
+[[gnu::optimize("strict-aliasing")]]
+void other_func() {
+ Combined<OtherClass> myvar;
+ int t = myvar.clashy();
+ if (!t)
+ __builtin_abort();
+}
+
+[[gnu::optimize("O0")]]
+int main()
+{
+ other_func();
+}
--
2.47.0
