PR tree-optimization/36508

	* tree-ssa-pre.c (compute_antic): Allow num_iterations up to
	499, don't check it at all in release compilers.

	* gcc.dg/pr36508.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@137036 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 29 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/pr36508.c b/gcc/testsuite/gcc.dg/pr36508.c
new file mode 100644
index 00000000000..30489923642
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr36508.c
@@ -0,0 +1,29 @@
+/* PR tree-optimization/36508 */
+/* { dg-do compile } */
+/* { dg-options "-O -ftree-pre" } */
+
+void
+foo (short *sp)
+{
+  int k;
+  k = 1;
+#define SP0 *sp++ = 1;
+  while (1)
+    {
+      if (k > 6)
+	break;
+      SP0
+      k++;
+    }
+  k = 1;
+  while (1)
+    {
+      if (k > 6)
+	break;
+      SP0
+      k++;
+    }
+#define SP1 SP0 SP0 SP0 SP0 SP0 SP0 SP0 SP0 SP0 SP0 SP0
+#define SP2 SP1 SP1 SP1 SP1 SP1 SP1 SP1 SP1 SP1 SP1 SP1
+  SP2
+}