re PR c++/69211 (g++ ICE on x86_64-linux-gnu (verify_gimple failed))

	PR c++/69211
	* cp-gimplify.c (cp_fold): If COMPOUND_EXPR or MODIFY_EXPR
	folded operands have side-effects, but folding changed any of them,
	build a new tree with the folded operands instead of returning the
	unfolded tree.

	* g++.dg/opt/pr69211.C: New test.

From-SVN: r232237

gcc/cp/ChangeLog

+2016-01-11  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/69211
+	* cp-gimplify.c (cp_fold): If COMPOUND_EXPR or MODIFY_EXPR
+	folded operands have side-effects, but folding changed any of them,
+	build a new tree with the folded operands instead of returning the
+	unfolded tree.
+
 2016-01-09  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/69113

gcc/cp/cp-gimplify.c

@@ -2086,7 +2086,11 @@ cp_fold (tree x)
       if ((code == COMPOUND_EXPR || code == MODIFY_EXPR)
 	  && ((op1 && TREE_SIDE_EFFECTS (op1))
 	       || (op0 && TREE_SIDE_EFFECTS (op0))))
-	break;
+	{
+	  if (op0 != TREE_OPERAND (x, 0) || op1 != TREE_OPERAND (x, 1))
+	    x = build2_loc (loc, code, TREE_TYPE (x), op0, op1);
+	  break;
+	}
       if (TREE_CODE (x) == COMPOUND_EXPR && !op0)
 	op0 = build_empty_stmt (loc);
 

gcc/testsuite/ChangeLog

 2016-01-11  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/69211
+	* g++.dg/opt/pr69211.C: New test.
+
 	PR tree-optimization/69214
 	* gcc.c-torture/compile/pr69214.c: New test.
 

gcc/testsuite/g++.dg/opt/pr69211.C

+// PR c++/69211
+// { dg-do compile }
+
+int a, b;
+
+int
+foo ()
+{
+  return (a & 5UL | (b = 4, 4L)) > 4;
+}