Regressions on trunk at revision 212304 vs revision 212299

[H.J. Lu x32]

New failures:
ERROR: g++.dg/ipa/imm-devirt-1.C  -std=gnu++11: error executing dg-final: couldn't compile regular expression pattern: parentheses () not balanced
ERROR: g++.dg/ipa/imm-devirt-1.C  -std=gnu++1y: error executing dg-final: couldn't compile regular expression pattern: parentheses () not balanced
ERROR: g++.dg/ipa/imm-devirt-1.C  -std=gnu++98: error executing dg-final: couldn't compile regular expression pattern: parentheses () not balanced
ERROR: g++.dg/ipa/imm-devirt-2.C  -std=gnu++11: error executing dg-final: couldn't compile regular expression pattern: parentheses () not balanced
ERROR: g++.dg/ipa/imm-devirt-2.C  -std=gnu++1y: error executing dg-final: couldn't compile regular expression pattern: parentheses () not balanced
ERROR: g++.dg/ipa/imm-devirt-2.C  -std=gnu++98: error executing dg-final: couldn't compile regular expression pattern: parentheses () not balanced

New passes: