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, 24 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr21086.c b/gcc/testsuite/gcc.dg/tree-ssa/pr21086.c
new file mode 100644
index 000000000..f924d26cc
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr21086.c
@@ -0,0 +1,24 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-vrp1 -fdump-tree-dce1" } */
+
+int
+foo (int *p)
+{
+  int a = *p;
+  int b = p != 0;
+
+  *p = b;
+
+  if (b)
+    return a;
+  else
+    return 0;
+}
+
+/* Target with fno-delete-null-pointer-checks should not fold checks */
+/* { dg-final { scan-tree-dump "Folding predicate " "vrp1" { target { ! keeps_null_pointer_checks } } } } */
+/* { dg-final { scan-tree-dump-times "Folding predicate " 0 "vrp1" { target {   keeps_null_pointer_checks } } } } */
+/* { dg-final { scan-tree-dump-not "b_. =" "dce1" { target { ! avr-*-* } } } } */
+/* { dg-final { scan-tree-dump "b_. =" "dce1" { target { avr-*-* } } } } */
+/* { dg-final { cleanup-tree-dump "vrp1" } } */
+/* { dg-final { cleanup-tree-dump "dce1" } } */