From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001
From: upstream source tree <ports@midipix.org>
Date: Sun, 15 Mar 2015 20:14:05 -0400
Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified
 gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream
 tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.
---
 gcc/testsuite/gcc.dg/tree-ssa/predcom-4.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/predcom-4.c

(limited to 'gcc/testsuite/gcc.dg/tree-ssa/predcom-4.c')

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/predcom-4.c b/gcc/testsuite/gcc.dg/tree-ssa/predcom-4.c
new file mode 100644
index 000000000..6f06b7f8b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/predcom-4.c
@@ -0,0 +1,30 @@
+/* { dg-do compile } */
+/* { dg-do run } */
+/* { dg-options "-O2 -fpredictive-commoning -fdump-tree-pcom-details" } */
+
+/* Test for predictive commoning of expressions, without reassociation.  */
+
+void abort (void);
+
+int a[1000], b[1000], c[1000];
+
+int main(void)
+{
+  int i;
+
+  for (i = 0; i < 1000; i++)
+    a[i] = b[i] = i;
+
+  for (i = 1; i < 998; i++)
+    c[i] = a[i + 2] * b[i + 1] - b[i - 1] * a[i];
+
+  for (i = 1; i < 998; i++)
+    if (c[i] != 4 * i + 2)
+      abort ();
+
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "Combination" 1 "pcom"} } */
+/* { dg-final { scan-tree-dump-times "Unrolling 3 times." 1 "pcom"} } */
+/* { dg-final { cleanup-tree-dump "pcom" } } */
-- 
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