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
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1 files changed, 114 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.misc-tests/i386-prefetch.exp b/gcc/testsuite/gcc.misc-tests/i386-prefetch.exp
new file mode 100644
index 000000000..a9f767cde
--- /dev/null
+++ b/gcc/testsuite/gcc.misc-tests/i386-prefetch.exp
@@ -0,0 +1,114 @@
+#   Copyright (C) 2002, 2004, 2007, 2008 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GCC; see the file COPYING3.  If not see
+# <http://www.gnu.org/licenses/>.
+
+# Test that the correct data prefetch instructions (SSE or 3DNow! variant,
+# or none) are used for various i386 cpu-type and instruction set
+# extension options for __builtin_prefetch.  When using -mtune, specify
+# the minimum supported architecture in case the compiler was configured
+# with a different default.
+
+# Failure reports do not include the compile option that was used; that
+# information can be seen in the compile line in the log file.
+
+# Do not generate prefetch instructions for the following options.
+
+set PREFETCH_NONE [list \
+	{ -march=i386 -mtune=i386 } \
+	{ -march=i386 -mtune=i486 } \
+	{ -march=i386 -mtune=i586 } \
+	{ -march=i386 -mtune=i686 } \
+	{ -march=i386 -mtune=pentium2 } \
+	{ -march=i386 -mtune=k6 } \
+	{ -march=i386 -mtune=k6-2 } \
+	{ -march=i386 -mtune=k6-3 } \
+	{ -march=i386 } \
+	{ -march=i486 } \
+	{ -march=i586 } \
+	{ -march=i686 } \
+	{ -march=pentium2 } \
+	{ -march=k6 } ]
+
+# For options in PREFETCH_SSE, generate SSE prefetch instructions for
+# __builtin_prefetch.  This includes -mtune for targets that treat prefetch
+# instructions as nops.
+
+set PREFETCH_SSE [list \
+	{ -march=i686 -mtune=pentium3 } \
+	{ -march=i686 -mtune=pentium3m } \
+	{ -march=i686 -mtune=pentium-m } \
+	{ -march=i686 -mtune=pentium4 } \
+	{ -march=i686 -mtune=pentium4m } \
+	{ -march=i686 -mtune=prescott } \
+	{ -march=i686 -mtune=athlon } \
+	{ -march=i686 -mtune=athlon-4 } \
+	{ -march=i686 -mtune=c3-2 } \
+	{ -march=pentium3 } \
+	{ -march=pentium3m } \
+	{ -march=pentium-m } \
+	{ -march=pentium4 } \
+	{ -march=pentium4m } \
+	{ -march=prescott } \
+	{ -march=c3-2 } ]
+
+# Generate 3DNow! prefetch instructions for the following.
+
+set PREFETCH_3DNOW [list \
+	{ -march=c3 } \
+	{ -march=k6-2 } \
+	{ -march=k6-3 } ]
+
+# Athlon supports both 3DNow! and SSE prefetch instructions.  For
+# __builtin_prefetch, generate the 3DNow! instruction for write
+# prefetches but SSE prefetch instructions for read prefetches.
+
+set PREFETCH_ATHLON [list \
+	{ -march=athlon } \
+	{ -march=athlon-4 } ]
+
+if $tracelevel then {
+    strace $tracelevel
+}
+
+# Load support procs.
+load_lib gcc-dg.exp
+load_lib torture-options.exp
+
+# Initialize harness.
+dg-init
+torture-init
+
+if { [board_info target exists multilib_flags]
+     && [string match "* -march=*" " [board_info target multilib_flags] "] } {
+    # Multilib flags come after the -march flags we pass and override
+    # them, so skip these tests when such flags are passed.
+    return
+}
+
+set-torture-options $PREFETCH_NONE
+gcc-dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/i386-pf-none-*.c]] ""
+
+set-torture-options $PREFETCH_SSE
+gcc-dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/i386-pf-sse-*.c]] ""
+
+set-torture-options $PREFETCH_3DNOW
+gcc-dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/i386-pf-3dnow-*.c]] ""
+
+set-torture-options $PREFETCH_ATHLON
+gcc-dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/i386-pf-athlon-*.c]] ""
+
+torture-finish
+dg-finish
+