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, 137 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/i386/mmx-8.c b/gcc/testsuite/gcc.target/i386/mmx-8.c
new file mode 100644
index 000000000..c90083bab
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/mmx-8.c
@@ -0,0 +1,137 @@
+/* PR middle-end/37809 */
+
+/* { dg-do run } */
+/* { dg-options "-O2 -mmmx" } */
+
+#include <mmintrin.h>
+
+#include "mmx-check.h"
+
+// Various tests of cases where it is incorrect to optimise vectors as if they
+// were integers of the same width.
+
+extern void abort (void);
+
+void __attribute__ ((noinline))
+Sshift()
+{
+    volatile __m64 y = (__m64) 0xffffffffll;
+    __m64 x = y & (__m64) 0xffffffffll;
+    x = _m_psradi (x, 1);
+    x &= (__m64) 0x80000000ll;
+    if (0 == (long long) x)
+        abort();
+}
+
+#define SHIFTU(F,B,S,T)                         \
+    void F()                                    \
+    {                                           \
+        volatile __m64 y = (__m64) 0ll;         \
+        __m64 x = y | (__m64) (1llu << B);      \
+        if (S > 0)                              \
+            x = _m_pslldi (x, S);               \
+        else                                    \
+            x = _m_psrldi (x, -S);              \
+        if (T > 0)                              \
+            x = _m_pslldi (x, T);               \
+        else                                    \
+            x = _m_psrldi (x, -T);              \
+        x &= (__m64) (1llu << (B + S + T));     \
+        if ((long long) x)                      \
+            abort();                            \
+    }
+
+SHIFTU (shiftU1, 31, 1, -1)
+SHIFTU (shiftU2, 32, -1, 1)
+SHIFTU (shiftU3, 31, 1, 0)
+SHIFTU (shiftU4, 32, -1, 0)
+
+void __attribute__ ((noinline))
+add_1()
+{
+    volatile long long ONE = 1;
+    long long one = ONE;
+
+    __m64 a = (__m64) one;
+    __m64 b = (__m64) -one;
+    __m64 c = a + b;
+    if (0 == (long long) c)
+        abort();
+}
+
+void __attribute__ ((noinline))
+add_2()
+{
+    volatile long long ONE = 1;
+    long long one = ONE;
+
+    __m64 a = (__m64) one;
+    __m64 b = (__m64) -one;
+    __m64 c = _m_paddd (a, b);
+    if (0 == (long long) c)
+        abort();
+}
+
+void __attribute__ ((noinline))
+mult_1()
+{
+    volatile __m64 y = (__m64) 0ll;
+    __m64 x = y | (__m64) (1ll << 32);
+    x = x * (__m64) 1ll;
+    x &= (__m64) (1ll << 32);
+    if (0 != (long long) x)
+        abort();
+}
+
+void __attribute__ ((noinline))
+mult_2()
+{
+    volatile int foo = 1;
+    unsigned long long one = foo & 1;
+
+    __m64 x = (__m64) (one << 16);
+    x *= x;
+    x &= (__m64) (1ll << 32);
+    if (0 != (long long) x)
+        abort();
+}
+
+void __attribute__ ((noinline))
+mult_3()
+{
+    volatile __m64 y = (__m64) (1ll << 32);
+    __m64 a = y;
+    __m64 b = y * (__m64) 1ll;
+    if (((long long) a) == (long long) b)
+        abort();
+}
+
+void __attribute__ ((noinline))
+div_1()
+{
+    volatile __m64 y = (__m64) 0ll;
+    __m64 x = y | (__m64) (1ull << 32);
+    x |= (__m64) 1ull;
+    x = x / x;
+    if (1ll == (long long) x)
+        abort();
+}
+
+
+void mmx_test (void)
+{
+    Sshift();
+    shiftU1();
+    shiftU2();
+    shiftU3();
+    shiftU4();
+
+    add_1();
+    add_2();
+
+    mult_1();
+    mult_2();
+    mult_3();
+
+    div_1();
+}