1 files changed, 51 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/pr51933.c b/gcc/testsuite/gcc.c-torture/execute/pr51933.c
new file mode 100644
index 0000000..a6556c9
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr51933.c
@@ -0,0 +1,51 @@
+/* PR rtl-optimization/51933 */
+
+static signed char v1;
+static unsigned char v2[256], v3[256];
+
+__attribute__((noclone, noinline)) void
+foo (void)
+{
+  asm volatile ("" : : "g" (&v1), "g" (&v2[0]), "g" (&v3[0]) : "memory");
+}
+
+__attribute__((noclone, noinline)) int
+bar (const int x, const unsigned short *y, char *z)
+{
+  int i;
+  unsigned short u;
+  if (!v1)
+    foo ();
+  for (i = 0; i < x; i++)
+    {
+      u = y[i];
+      z[i] = u < 0x0100 ? v2[u] : v3[u & 0xff];
+    }
+  z[x] = '\0';
+  return x;
+}
+
+int
+main (void)
+{
+  char buf[18];
+  unsigned short s[18];
+  unsigned char c[18] = "abcdefghijklmnopq";
+  int i;
+  for (i = 0; i < 256; i++)
+    {
+      v2[i] = i;
+      v3[i] = i + 1;
+    }
+  for (i = 0; i < 18; i++)
+    s[i] = c[i];
+  s[5] |= 0x600;
+  s[6] |= 0x500;
+  s[11] |= 0x2000;
+  s[15] |= 0x500;
+  foo ();
+  if (bar (17, s, buf) != 17
+      || __builtin_memcmp (buf, "abcdeghhijkmmnoqq", 18) != 0)
+    __builtin_abort ();
+  return 0;
+}