[committed] Add testcase from PR tree-optimization/71109

[Jakub Jelinek]

Hi!

This testcase broke on x86_64-linux with -O3 with r227775
and got fixed or went latent with r236372.  I've just committed the
testcase to the testsuite as obvious, let's close the PR now.

2018-12-03  Jakub Jelinek  <ja...@redhat.com>

        PR tree-optimization/71109
        * gcc.c-torture/compile/pr71109.c: New test.

--- gcc/testsuite/gcc.c-torture/compile/pr71109.c.jj    2018-12-03 
14:28:42.678952260 +0100
+++ gcc/testsuite/gcc.c-torture/compile/pr71109.c       2018-12-03 
14:28:38.928013113 +0100
@@ -0,0 +1,31 @@
+/* PR tree-optimization/71109 */
+
+struct S { int g, h; signed char i; int j; signed char k; int l[4]; } a, c;
+struct T { signed char g; } e;
+int *b, d;
+static void foo ();
+
+void
+bar (void)
+{
+  while (d)
+    {
+      int k;
+      struct T f[3];
+      foo (bar, a);
+      for (k = 0;; k++)
+       f[k] = e;
+    }
+}
+
+static inline void
+foo (int x, struct S y, struct T z)
+{
+  for (z.g = 2; z.g; z.g--)
+    {
+      c = a = y;
+      *b |= 6;
+      if (y.g)
+       break;
+    }
+}

        Jakub