re PR target/39002 (codegen bug, stack pointer is not restored)

	PR target/39002
	* g++.dg/torture/pr39002.C: New test.

From-SVN: r143782

gcc/testsuite/ChangeLog

+2009-01-30  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/39002
+	* g++.dg/torture/pr39002.C: New test.
+
 2009-01-29  Kazu Hirata  <kazu@codesourcery.com>
 
 	PR tree-optimization/39007

gcc/testsuite/g++.dg/torture/pr39002.C

+// PR target/39002
+// { dg-do run }
+
+struct S
+{
+  double x;
+  double y;
+  double z;
+};
+
+double foo (S *, S *);
+void bar (S *, S *, S *, double &, double &, double &);
+
+double
+foo (S *a1, S *a2)
+{
+  return __builtin_sqrt ((a1->x - a2->x) * (a1->x - a2->x)
+			 + (a1->y - a2->y) * (a1->y - a2->y)
+			 + (a1->z - a2->z) * (a1->z - a2->z));
+}
+
+void
+bar (S *p, S *q, S *r, double &x, double &y, double &z)
+{
+  if (foo (p, q) == 0.0)
+    {
+      x = r->x;
+      y = r->y;
+      z = r->z;
+      return;
+    }
+  if (foo (p, r) == 0.0)
+    {
+      x = r->x;
+      y = r->y;
+      z = r->z;
+      return;
+    }
+  if (foo (q, r) == 0.0)
+    {
+      x = r->x;
+      y = r->y;
+      z = r->z;
+      return;
+    }
+
+  double a1, b1, c1, d1, e1;
+  double dx, dy, dz, dw, dv;
+
+  a1 = q->x - p->x;
+  b1 = q->y - p->y;
+  c1 = q->z - p->z;
+  e1 = __builtin_sqrt (a1 * a1 + b1 * b1 + c1 * c1);
+  a1 = a1 / e1;
+  b1 = b1 / e1;
+  c1 = c1 / e1;
+  dx = p->x - r->x;
+  dy = p->y - r->y;
+  dz = p->z - r->z;
+  dw = dx * dx + dy * dy + dz * dz;
+  dv = 2.0 * dx * a1 + 2.0 * dy * b1 + 2.0 * dz * c1;
+  d1 = -dv / 2.0;
+  x = p->x + (a1 * d1);
+  y = p->y + (b1 * d1);
+  z = p->z + (c1 * d1);
+  return;
+}
+
+int
+main (void)
+{
+  S a, b, c, d, *p, *q, *r;
+
+  p = &a;
+  q = &b;
+  r = &c;
+  a.x = 0.0;
+  a.y = 0.0;
+  a.z = 0.0;
+  b.x = 1.0;
+  b.y = 0.0;
+  b.z = 0.0;
+  c.x = 0.0;
+  c.y = 1.0;
+  c.z = 0.0;
+  bar (p, q, r, d.x, d.y, d.z);
+  return 0;
+}