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, 42 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/torture/pr19683-1.c b/gcc/testsuite/gcc.dg/torture/pr19683-1.c
new file mode 100644
index 000000000..05bf17418
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr19683-1.c
@@ -0,0 +1,42 @@
+/* From PR rtl-optimization/19683.  On little-endian MIPS targets,
+   reload would incorrectly inherit the high part of the multiplication
+   result.  */
+/* { dg-do run { target mips*-*-* } } */
+
+extern void abort (void);
+extern void exit (int);
+
+#define REPEAT10(X, Y)					\
+  X(Y##0); X(Y##1); X(Y##2); X(Y##3); X(Y##4);		\
+  X(Y##5); X(Y##6); X(Y##7); X(Y##8); X(Y##9)
+
+#define REPEAT30(X) REPEAT10 (X, 0); REPEAT10 (X, 1); REPEAT10 (X, 2)
+#define IN(X) unsigned int x##X = ptr[0]
+#define OUT(X) ptr[0] = x##X
+
+union u { unsigned long long ll; unsigned int i[2]; };
+
+unsigned int __attribute__ ((nomips16))
+foo (volatile unsigned int *ptr)
+{
+  union u u;
+  int result;
+
+  u.ll = (unsigned long long) ptr[0] * ptr[0];
+  REPEAT30 (IN);
+  REPEAT30 (OUT);
+  asm ("#" : "=l" (result) : "l" (u.i[1]));
+  return result;
+}
+
+int __attribute__ ((nomips16))
+main (void)
+{
+  unsigned int array[] = { 1000 * 1000 * 1000 };
+  union u u;
+
+  u.ll = (unsigned long long) array[0] * array[0];
+  if (foo (array) != u.i[1])
+    abort ();
+  exit (0);
+}