1 files changed, 29 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr39874.c b/gcc/testsuite/gcc.dg/pr39874.c
new file mode 100644
index 000000000..ca4528310
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr39874.c
@@ -0,0 +1,29 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-optimized" }  */
+
+extern void func();
+
+void test1(char *signature)
+{
+  char ch = signature[0];
+  if (ch == 15 || ch == 3)
+  {
+    if (ch == 15) func();
+  }
+}
+
+
+void test2(char *signature)
+{
+  char ch = signature[0];
+  if (ch == 15 || ch == 3)
+  {
+    if (ch > 14) func();
+  }
+}
+
+/* { dg-final { scan-tree-dump-times " == 15" 2 "optimized" } } */
+/* { dg-final { scan-tree-dump-not " == 3" "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */
+
+