1 files changed, 37 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-ifcombine-6.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-ifcombine-6.c
new file mode 100644
index 000000000..90abc8deb
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-ifcombine-6.c
@@ -0,0 +1,37 @@
+/* { dg-do compile } */
+/* { dg-options "-O -fdump-tree-ifcombine" } */
+
+void bar (void);
+
+void
+foo1 (unsigned int a)
+{
+  if (a & 1)
+    goto heaven;
+  if (a & 4)
+    goto heaven;
+  return;
+
+ heaven:
+  bar ();
+}
+
+void
+foo2 (unsigned int a)
+{
+  if (a & 1)
+    if (a & 4)
+      goto heaven;
+  return;
+
+ heaven:
+  bar ();
+}
+
+
+/* The special treatment of a & 1 != 0 in fold caused the pattern not
+   to be recognized due to extra conversions inserted.  */
+
+/* { dg-final { scan-tree-dump "optimizing bits or bits test" "ifcombine" } } */
+/* { dg-final { scan-tree-dump "optimizing double bit test" "ifcombine" } } */
+/* { dg-final { cleanup-tree-dump "ifcombine" } } */