obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

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.

1 files changed, 75 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-1.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-1.c
new file mode 100644
index 000000000..82f37abc8
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-1.c
@@ -0,0 +1,75 @@
+/* { dg-do compile } */ 
+/* { dg-options "-O -fdump-tree-ccp1" } */
+
+extern void link_error (void);
+
+/* check folding */
+
+void test1 (void)
+{
+  unsigned int l = 3 * 4 - 5 / 2;
+  if (l != 10)
+    link_error ();
+}
+
+void test11 (void)
+{
+  unsigned int l = (((((((3 / 2 + 2) * 4) & 7) ^ 3) % 8) << 2) + 1) >> 2;
+  if (l != 7)
+    link_error ();
+}
+
+/* cprop in a basic block */
+void test111 (void)
+{
+  unsigned int l0 = 3 / 2 + 2;
+  unsigned int l1 = l0 * 4;
+  unsigned int l2 = 7;
+  unsigned int l3 = l1 & l2;
+  unsigned int l4 = 3;
+  unsigned int l5 = l3 ^ l4;
+  unsigned int l6 = 8;
+  unsigned int l7 = l5 % l6;
+  unsigned int l8 = 2;
+  unsigned int l9 = l7 << l8;
+  unsigned int l10 = l9 + 1;
+  unsigned int l11 = l10 >> 2;
+  if (l11 != 7)
+    link_error ();
+}
+
+
+/* cprop after an if statement */
+void test1111 (int p)
+{
+  int l = 53;
+  if (p)
+    {
+      if ((67 + l - 25) != 95)
+        link_error ();
+    }
+  else
+    {
+      if ((93 - l +  25) != 65)
+        link_error ();
+    }
+}
+
+/* cprop after a loop */
+void test11111 (int p, int q, int r)
+{
+  int l = 53;
+  while (p < r)
+    {
+      if ((67 + l - 25) != 95)
+        link_error ();
+      p -= q;
+    }
+}
+
+
+
+/* There should be not link_error calls, if there is any the
+   optimization has failed */
+/* { dg-final { scan-tree-dump-times "link_error" 0 "ccp1"} } */
+/* { dg-final { cleanup-tree-dump "ccp1" } } */