+2017-05-01 Martin Sebor <msebor@redhat.com>
+
+ PR tree-optimization/79715
+ * gcc.dg/pr79715.c: New test.
+
2017-05-01 Tom de Vries <tom@codesourcery.com>
PR testsuite/65941
--- /dev/null
+/* PR tree-optimization/79715 - hand-rolled strdup with unused result
+ not eliminated
+ { dg-do compile }
+ { dg-options "-O2 -Wall -fdump-tree-optimized" } */
+
+void f (const char *s)
+{
+ unsigned n = __builtin_strlen (s) + 1;
+ char *p = __builtin_malloc (n);
+ __builtin_memcpy (p, s, n);
+ __builtin_free (p);
+}
+
+void g (const char *s)
+{
+ unsigned n = __builtin_strlen (s) + 1;
+ char *p = __builtin_malloc (n);
+ __builtin_strcpy (p, s);
+ __builtin_free (p);
+}
+
+/* { dg-final { scan-tree-dump-not "free" "optimized" } }
+ { dg-final { scan-tree-dump-not "malloc" "optimized" } }
+ { dg-final { scan-tree-dump-not "memcpy" "optimized" } }
+ { dg-final { scan-tree-dump-not "strcpy" "optimized" } }
+ { dg-final { scan-tree-dump-not "strlen" "optimized" } } */