see.c (see_pre_insert_extensions): Use copy_rtx to avoid invalid rtx sharing.

	* see.c (see_pre_insert_extensions): Use copy_rtx to avoid invalid rtx
	sharing.

	* gcc.c-torture/compile/20080522-1.c: New testcase.

From-SVN: r135770

gcc/ChangeLog

+2008-05-22  Rafael Espindola  <espindola@google.com>
+
+	* see.c (see_pre_insert_extensions): Use copy_rtx to avoid invalid rtx
+	sharing.
+
 2008-05-22  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* defaults.h (UNITS_PER_SIMD_WORD): Add scalar mode as argument.

gcc/see.c

@@ -1686,7 +1686,7 @@ see_pre_insert_extensions (struct see_pre_extension_expr **index_map)
 		edge eg = INDEX_EDGE (edge_list, e);
 
 		start_sequence ();
-		emit_insn (PATTERN (expr->se_insn));
+		emit_insn (copy_insn (PATTERN (expr->se_insn)));
 		se_insn = get_insns ();
 		end_sequence ();
 

gcc/testsuite/ChangeLog

+2008-05-22  Rafael Espindola  <espindola@google.com>
+
+	* gcc.c-torture/compile/20080522-1.c: New testcase.
+
 2008-05-22  Richard Guenther  <rguenther@suse.de>
 
 	* gcc.c-torture/execute/20080522-1.c: New testcase.

gcc/testsuite/gcc.c-torture/compile/20080522-1.c

+/* { dg-do compile }
+/* { dg-options "-O2 -fsee" } */
+
+int f(const char* ptr, int bar) {
+  return (((const char *)0 - ptr ) & (bar - 1)) == 0;
+}
+
+
+int g(const char* ptr, const char *test, int N, int bar)  {
+  if (N == 0) {
+  }
+  else if (N > 0) {
+    int count = 0;
+    while ( count < N) {
+      if (!f(ptr, bar))
+        count++;
+    }
+  }
+  return f(test, bar) ;
+}