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, 35 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/loop-7.c b/gcc/testsuite/gcc.dg/tree-ssa/loop-7.c
new file mode 100644
index 000000000..ab4a5026f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/loop-7.c
@@ -0,0 +1,35 @@
+/* PR tree-optimization/19828 */
+/* { dg-do compile } */
+/* { dg-options "-O1 -fdump-tree-lim-details" } */
+
+int cst_fun1 (int) __attribute__((__const__));
+int cst_fun2 (int) __attribute__((__const__));
+int pure_fun1 (int) __attribute__((__pure__));
+int pure_fun2 (int) __attribute__((__pure__));
+int foo (void);
+
+int xxx (void)
+{
+  int i, k = foo (), x = 0;
+
+  for (i = 0; i < 100; i++)
+    {
+      x += cst_fun1 (k);
+      x += pure_fun1 (k);
+
+      if (k)
+	{
+	  x += cst_fun2 (k);
+	  x += pure_fun2 (k);
+	}
+    }
+
+  return x;
+}
+
+/* Calls to cst_fun1 and pure_fun1 may be moved out of the loop.
+   Calls to cst_fun2 and pure_fun2 should not be, since calling
+   with k = 0 may be invalid.  */
+
+/* { dg-final { scan-tree-dump-times "Moving statement" 2 "lim1" } } */
+/* { dg-final { cleanup-tree-dump "lim\[1-2\]" } } */