re PR middle-end/51782 (-ftree-sra: Missing address-space information leads to wrong)

	PR middle-end/51782
	* gcc.target/avr/torture/pr51782-1.c: New test.

From-SVN: r184434

gcc/testsuite/ChangeLog

+2012-02-21  Georg-Johann Lay  <avr@gjlay.de>
+
+	PR middle-end/51782
+	* gcc.target/avr/torture/pr51782-1.c: New test.
+
 2012-02-21  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/52318

gcc/testsuite/gcc.target/avr/torture/pr51782-1.c

+/* PR middle-end/51782 */
+/* { dg-do run } */
+/* { dg-options { "-std=gnu99" } } */
+
+#include <stdlib.h>
+
+struct R { char r; };
+struct RGB { char r,g,b; };
+
+__flash const struct R r1 = { 12 };
+__flash const struct RGB r3 = { 23, 56, 78 };
+
+char __attribute__((noinline,noclone))
+read1_bug (const __flash struct R *s)
+{
+  struct R t = *s;
+  return t.r;
+}
+
+char __attribute__((noinline,noclone))
+read1_ok (const __flash struct R *s)
+{
+  return s->r;
+}
+
+char __attribute__((noinline,noclone))
+read3_bug (const __flash struct RGB *s)
+{
+  struct RGB t = *s;
+  return t.r + t.g + t.b;
+}
+
+char __attribute__((noinline,noclone))
+read3_ok (const __flash struct RGB *s)
+{
+  return s->r + s->g + s->b;
+}
+
+__flash const struct R * volatile p1 = &r1;
+__flash const struct RGB * volatile p3 = &r3;
+
+int main (void)
+{
+  if (read1_bug (p1) != read1_ok (p1))
+    abort();
+  
+  if (read3_bug (p3) != read3_ok (p3))
+    abort();
+  
+  exit (0);
+}