From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001
From: upstream source tree <ports@midipix.org>
Date: Sun, 15 Mar 2015 20:14:05 -0400
Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; 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.
---
 gcc/testsuite/gcc.dg/tree-ssa/pr21985.c | 34 +++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/pr21985.c

(limited to 'gcc/testsuite/gcc.dg/tree-ssa/pr21985.c')

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr21985.c b/gcc/testsuite/gcc.dg/tree-ssa/pr21985.c
new file mode 100644
index 000000000..19ad0f113
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr21985.c
@@ -0,0 +1,34 @@
+/* { dg-do compile } */
+/* { dg-options "-O1 -fdump-tree-optimized" } */
+
+struct
+{
+  struct
+    {
+      int a;
+      int b;
+    } a[100];
+} a;
+
+typedef __SIZE_TYPE__ size_t;
+void foo(size_t);
+size_t *bar (void);
+
+int
+main (void)
+{
+  size_t *b = bar ();
+
+  /* This should be folded.  */
+  foo (&a.a[50].a - &a.a[33].b);
+  foo ((size_t) &a.a[50].b - (size_t) &a);
+
+  /* And this should not.  */
+  foo ((size_t) &b - (size_t) b);
+  return 0;
+}
+
+/* Two of the calls to foo should be folded to just foo(constant).  */
+
+/* { dg-final { scan-tree-dump-times "foo \\(\[0-9\]*\\)" 2 "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */
-- 
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