* g++.dg/ipa/devirt-15.C: New testcase.

From-SVN: r202153

gcc/testsuite/ChangeLog

+2013-09-01  Jan Hubicka  <jh@suse.cz>	
+
+	* g++.dg/ipa/devirt-15.C: New testcase.
+
 2013-09-01  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gnat.dg/specs/linker_alias.ads: Skip on Darwin.

gcc/testsuite/g++.dg/ipa/devirt-15.C

+/* Check that we speculatively devirutalize call to FOO to B::foo becuase
+   A is noreturn.  */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-ipa-devirt"  } */
+class A {
+public:
+  virtual int foo(void)
+    {
+      throw (1);
+      return 0;
+    }
+};
+
+
+class B : public A {
+public:
+  virtual int foo(void);
+};
+
+int
+B::foo(void)
+{
+  return 1;
+}
+class A a, *b=&a;
+void
+m(void)
+{
+  b->foo();
+}
+main()
+{
+  m();
+}
+
+/* { dg-final { scan-ipa-dump "Speculatively devirtualizing call" "devirt"} } */
+/* { dg-final { cleanup-ipa-dump "devirt" } } */
+/* Match if (PROF_6 == foo) to verify that the speculation survived.  */
+/* { dg-final { scan-tree-dump "== foo" "optimized"} } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */