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, 21 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/vect/vect-debug-pr41926.c b/gcc/testsuite/gcc.dg/vect/vect-debug-pr41926.c
new file mode 100644
index 000000000..a2d36d3b0
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/vect-debug-pr41926.c
@@ -0,0 +1,21 @@
+/* PR debug/41926 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -g -ffast-math -funroll-loops -ftree-vectorize -msse2" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-require-effective-target sse2 { target { i?86-*-* x86_64-*-* } } } */
+
+void
+foo (double (*__restrict p)[4], double (*__restrict q)[4],
+     double *__restrict prim, double scale, double pp, double pq)
+{
+  int md, mc, mb, ma, p_index = 0;
+
+  for (md = 0; md < 1; md++)
+    for (mc = 0; mc < 1; mc++)
+      for (mb = 0; mb < 1; mb++)
+	for (ma = 0; ma < 4; ma++)
+	  {
+	    double tmp = scale * prim[p_index++];
+	    p[md][ma] = p[md][ma] - tmp * pp;
+	    q[mc][ma] = q[mc][ma] - tmp * pq;
+	  }
+}