vrp76.c: New test.

2012-08-01  Tom de Vries  <tom@codesourcery.com>

	* gcc.dg/tree-ssa/vrp76.c: New test.

From-SVN: r190044

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 330e64583958f2abbc6530a4798c260fb0f565ef..0537caf2209db822f74364f473be2b0b4976e1f4 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2012-08-01  Tom de Vries  <tom@codesourcery.com>
+
+       * gcc.dg/tree-ssa/vrp76.c: New test.
+
 2012-08-01  Bill Schmidt  <wschmidt@linux.ibm.com>
 
        PR tree-optimization/46556

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/vrp76.c b/gcc/testsuite/gcc.dg/tree-ssa/vrp76.c
new file mode 100644 (file)
index 0000000..c8b8595
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/vrp76.c
@@ -0,0 +1,35 @@
+/* { dg-do link } */
+/* { dg-options "-O2 -fno-tree-switch-conversion" } */
+
+/* Based on f3 from vrp63.c, but with switch instead of if-chain.  This test
+   tests the propagation of an anti-range in a switch statement.  */
+
+extern void link_error (void);
+
+void
+f3 (int s)
+{
+  if (s >> 3 == -2)
+    /* s in range [ -16, -9].  */
+    ;
+  else
+    {
+      /* s in range ~[-16, -9], so none of the case labels can be taken.  */
+      switch (s)
+       {
+       case -16:
+       case -12:
+       case -9:
+         link_error ();
+         break;
+       default:
+         break;
+       }
+    }
+}
+
+int
+main ()
+{
+  return 0;
+}