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, 59 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/pr42715.c b/gcc/testsuite/gcc.dg/pr42715.c
new file mode 100644
index 000000000..72bdfc862
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr42715.c
@@ -0,0 +1,59 @@
+/* { dg-do compile { target fpic } } */
+/* { dg-options "-fPIC -g -O2 -w" } */
+/* var-tracking failed to clobber the reg holding v at the asm insn,
+   so v ended up bound to an intermediate PIC expression.  */
+
+struct A { unsigned a1; char a2[15]; };
+struct B { long b1; unsigned char b2; long b3; };
+struct C { void *c1; unsigned c2; unsigned c3; };
+
+static struct A v1;
+struct A *const v2 = &v1;
+
+static inline
+int foo (void)
+{
+  int *v;
+  __asm__ __volatile__ ("" : "=r" (v));
+  return v[1];
+}
+
+static void
+bar (struct C *x)
+{
+  if (x->c2 == x->c3 && x->c1)
+    f1 (foo (), x->c1, x->c3 * sizeof (x->c1[0]));
+}
+
+void
+baz (struct B *y)
+{
+  int i;
+  const char *j;
+  char *k;
+  char x[64];
+  for (i = 0; i < sizeof (struct B); i++, y)
+    {
+      switch (y->b2)
+        {
+        case 0x20:
+          if (__builtin_strchr (j, '='))
+            continue;
+        }
+      switch (y->b2)
+        {
+        case 0x80:
+          bar (&x);
+          f2 (y->b3);
+        case 0x2e:
+        case 0x4e:
+          break;
+        default:
+          if (v2->a1)
+            f2 (y->b2);
+        }
+      k[0] = '\0';
+      if (v2->a1)
+        f2 (y->b1);
+    }
+}