* g++.dg/tree-ssa/pr31146-2.C: Only do scan-tree-dump for c++14_down.
	* g++.dg/tree-ssa/pr41428.C: Likewise.
	* g++.dg/expr/bool1.C: Only do dg-do compile instead of dg-do run for
	c++17 and up.
	* g++.dg/expr/bool3.C: Likewise.
	* g++.dg/expr/bitfield5.C: Likewise.
	* g++.old-deja/g++.jason/bool5.C: Likewise.

From-SVN: r252985