Merge tree-ssa-20020619-branch into mainline.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@81764 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 29 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-dce-3.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-dce-3.c
new file mode 100644
index 00000000000..efaa3affaf6
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-dce-3.c
@@ -0,0 +1,29 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-cddce" } */
+
+int main(void)
+{
+  unsigned i, j;
+
+  for (i = 1, j = 0; i != 0; i+=2)
+    {
+      j += 500;
+      if (j % 7)
+	{
+	  j++;
+	}
+      else
+	{
+	  j--;
+	}
+    }
+
+  return 0;
+}
+
+/* We should eliminate the inner condition, but the loop must be preserved
+   as it is infinite.  Therefore there should be just one phi node (for i):  */
+/* { dg-final { scan-tree-dump-times "PHI " 1 "cddce"} } */
+
+/* And one if (for the exit condition of the loop):  */
+/* { dg-final { scan-tree-dump-times "if " 1 "cddce"} } */