Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 39 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/vrp07.c b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/vrp07.c
new file mode 100644
index 000000000..6584919b5
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/vrp07.c
@@ -0,0 +1,39 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-vrp1-details" } */
+
+foo (int i, int *p)
+{
+  int j;
+
+  if (i > 10)
+    {
+      if (p)
+	{
+	  j = *p;
+	  /* This should be folded to if (1) because of the parent 'if
+	     (p)'.  But the dereference of p above does not need an
+	     assertion.  */
+	  if (p)
+	    return j + 1;
+	}
+    }
+  else
+    {
+      j = *p - 3;
+      /* This should be folded to if (0), because p has just been
+	 dereferenced.  But we were not inserting enough ASSERT_EXPRs
+	 to figure it out.  */
+      if (!p)
+	return j - 4;
+    }
+
+  return i;
+}
+/* Target with fno-delete-null-pointer-checks should not fold checks */
+/* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 1" 1 "vrp1" } } */
+/* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 0" 1 "vrp1" { target { ! keeps_null_pointer_checks } } } } */
+/* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 0" 0 "vrp1" { target {   keeps_null_pointer_checks } } } } */
+
+/* { dg-final { scan-tree-dump-times "PREDICATE: p_\[0-9\]" 2 "vrp1" { target { ! keeps_null_pointer_checks } } } } */
+/* { dg-final { scan-tree-dump-times "PREDICATE: p_\[0-9\]" 1 "vrp1" { target {   keeps_null_pointer_checks } } } } */
+/* { dg-final { cleanup-tree-dump "vrp1" } } */