re PR middle-end/52173 (internal compiler error: verify_ssa failed possibly caused by itm)

2012-09-24  Richard Guenther  <rguenther@suse.de>

	PR middle-end/52173
	* gimple.c (gimple_copy): Properly mark the copy modified
	if SSA operands are present.

	* gcc.dg/tm/pr52173-1.c: New.
	* gcc.dg/tm/pr52173-2.c: New.

From-SVN: r191658

gcc/ChangeLog

+2012-09-24  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/52173
+	* gimple.c (gimple_copy): Properly mark the copy modified
+	if SSA operands are present.
+
 2012-09-23  Eric Botcazou  <ebotcazou@adacore.com>
 
 	PR tree-optimization/54669

gcc/gimple.c

@@ -2333,24 +2333,21 @@ gimple_copy (gimple stmt)
     }
 
   /* Make copy of operands.  */
-  if (num_ops > 0)
-    {
   for (i = 0; i < num_ops; i++)
     gimple_set_op (copy, i, unshare_expr (gimple_op (stmt, i)));
 
-      /* Clear out SSA operand vectors on COPY.  */
-      if (gimple_has_ops (stmt))
-	{
-	  gimple_set_def_ops (copy, NULL);
-	  gimple_set_use_ops (copy, NULL);
-	}
-
   if (gimple_has_mem_ops (stmt))
     {
       gimple_set_vdef (copy, gimple_vdef (stmt));
       gimple_set_vuse (copy, gimple_vuse (stmt));
     }
 
+  /* Clear out SSA operand vectors on COPY.  */
+  if (gimple_has_ops (stmt))
+    {
+      gimple_set_def_ops (copy, NULL);
+      gimple_set_use_ops (copy, NULL);
+
       /* SSA operands need to be updated.  */
       gimple_set_modified (copy, true);
     }

gcc/testsuite/ChangeLog

+2012-09-24  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/52173
+	* gcc.dg/tm/pr52173-1.c: New.
+	* gcc.dg/tm/pr52173-2.c: New.
+
 2012-09-23  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc.dg/pr54669.c: New test.

gcc/testsuite/gcc.dg/tm/pr52173-1.c

+/* { dg-do compile } */
+/* { dg-options "-fgnu-tm -O3" } */
+
+int vec[500];
+
+void func()
+{ 
+  __transaction_relaxed
+    { 
+      vec[123] = 456;
+    }
+}
+
+main()
+{ 
+  int i;
+  for(i = 0; i < 10; ++i)
+    func();
+}

gcc/testsuite/gcc.dg/tm/pr52173-2.c

+/* { dg-do compile } */
+/* { dg-options "-fgnu-tm -O2" } */
+
+int a;
+
+int main()
+{
+  int i;
+  for (i = 0; i < 1; ++i)
+    __transaction_atomic { ++a; }
+  return 0;
+}