Regressions on trunk at revision 199842 vs revision 199804

[H.J. Lu Intel64 Core 2/i7]

New failures:

New passes:
FAIL: gcc.dg/debug/dwarf2/discriminator.c scan-assembler loc [0-9] 11 [0-9]( is_stmt [0-9])? discriminator 1\n
FAIL: gcc.dg/debug/dwarf2/discriminator.c scan-assembler loc [0-9] 11 [0-9]( is_stmt [0-9])? discriminator 1\n
FAIL: gcc.dg/debug/dwarf2/discriminator.c scan-assembler loc [0-9] 11 [0-9]( is_stmt [0-9])? discriminator 2\n
FAIL: gcc.dg/debug/dwarf2/discriminator.c scan-assembler loc [0-9] 11 [0-9]( is_stmt [0-9])? discriminator 2\n
FAIL: gcc.dg/debug/dwarf2/discriminator.c scan-assembler loc [0-9] 11 [0-9]( is_stmt [0-9])?\n
FAIL: gcc.dg/debug/dwarf2/discriminator.c scan-assembler loc [0-9] 11 [0-9]( is_stmt [0-9])?\n
ERROR: gcc.dg/tree-ssa/attr-alias.c: error executing dg-final: couldn't compile regular expression pattern: parentheses () not balanced
ERROR: gcc.dg/tree-ssa/attr-alias.c: error executing dg-final: couldn't compile regular expression pattern: parentheses () not balanced