This PR was fixed in r228767 (or went latent?), but this testcase has never
been added.
Tested on x86_64-linux, ok for trunk?
2015-12-01 Marek Polacek <pola...@redhat.com>
PR tree-optimization/67916
* gcc.dg/torture/pr67916.c: New test.
diff --git gcc/testsuite/gcc.dg/torture/pr67916.c
gcc/testsuite/gcc.dg/torture/pr67916.c
index e69de29..88541f9 100644
--- gcc/testsuite/gcc.dg/torture/pr67916.c
+++ gcc/testsuite/gcc.dg/torture/pr67916.c
@@ -0,0 +1,46 @@
+/* PR tree-optimization/67916 */
+/* { dg-do run } */
+
+int a[6], b = 1, d, e;
+long long c;
+static int f = 1;
+
+void
+fn1 (int p1)
+{
+ b = (b >> 1) & (1 ^ a[(1 ^ p1) & 5]);
+}
+
+void
+fn2 ()
+{
+ b = (b >> 1) & (1 ^ a[(b ^ 1) & 1]);
+ fn1 (c >> 1 & 5);
+ fn1 (c >> 2 & 5);
+ fn1 (c >> 4 & 5);
+ fn1 (c >> 8 & 5);
+}
+
+int
+main ()
+{
+ int i, j;
+ for (; d;)
+ {
+ for (; e;)
+ fn2 ();
+ f = 0;
+ }
+ for (i = 0; i < 8; i++)
+ {
+ if (f)
+ i = 9;
+ for (j = 0; j < 7; j++)
+ fn2 ();
+ }
+
+ if (b != 0)
+ __builtin_abort ();
+
+ return 0;
+}
Marek
