From 568265573d247d2f988d95f41f51325148139f3d Mon Sep 17 00:00:00 2001
From: Richard Guenther <rguenther@suse.de>
Date: Tue, 6 Feb 2007 12:38:32 +0000
Subject: [PATCH] re PR middle-end/27302 (Fold does not fold (i < j) == (j > i)
 to 1)

2007-02-06  Richard Guenther  <rguenther@suse.de>

        PR middle-end/27302
        * gcc.dg/torture/pr27302-2.c: New testcase.

From-SVN: r121644
---
 gcc/testsuite/ChangeLog                  |  5 +++
 gcc/testsuite/gcc.dg/torture/pr27302-2.c | 52 ++++++++++++++++++++++++
 2 files changed, 57 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/torture/pr27302-2.c

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d86d8725ef53..0ae9d64f094b 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2007-02-06  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/27302
+	* gcc.dg/torture/pr27302-2.c: New testcase.
+
 2007-02-06  Dorit Nuzman  <dorit@il.ibm.com>
 
 	* gcc.dg/vect/vect.exp: Add support for -fno-tree-scev-cprop tests.
diff --git a/gcc/testsuite/gcc.dg/torture/pr27302-2.c b/gcc/testsuite/gcc.dg/torture/pr27302-2.c
new file mode 100644
index 000000000000..5c201b3d2dda
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr27302-2.c
@@ -0,0 +1,52 @@
+/* { dg-do run } */
+/* { dg-options "-fstrict-overflow" } */
+
+extern void link_error (void);
+
+void test0 (int a, int b)
+{
+  if ((a < b) != (b > a))
+    link_error ();
+
+  if ((a - 1 < b) != (a <= b))
+    link_error ();
+  if ((a - 2 < b) != (a - 1 <= b))
+    link_error ();
+  if ((a + -1 < b) != (a <= b))
+    link_error ();
+  if ((a + -2 < b) != (a + -1 <= b))
+    link_error ();
+
+  if ((a + 1 > b) != (a >= b))
+    link_error ();
+  if ((a + 2 > b) != (a + 1 >= b))
+    link_error ();
+  if ((a - -1 > b) != (a >= b))
+    link_error ();
+  if ((a - -2 > b) != (a - -1 >= b))
+    link_error ();
+
+  if ((a + 1 <= b) != (a < b))
+    link_error ();
+  if ((a + 2 <= b) != (a + 1 < b))
+    link_error ();
+  if ((a - -1 <= b) != (a < b))
+    link_error ();
+  if ((a - -2 <= b) != (a - -1 < b))
+    link_error ();
+
+  if ((a - 1 >= b) != (a > b))
+    link_error ();
+  if ((a - 2 >= b) != (a - 1 > b))
+    link_error ();
+  if ((a + -1 >= b) != (a > b))
+    link_error ();
+  if ((a + -2 >= b) != (a + -1 > b))
+    link_error ();
+}
+
+int main()
+{
+  test0 (1, 2);
+  return 0;
+}