Regressions on trunk at revision 252752 vs revision 252749

[H.J. Lu]

New failures:
FAIL: gcc.dg/tree-prof/cold_partition_label.c scan-tree-dump optimized "string_0 = "";"
FAIL: gcc.dg/tree-prof/cold_partition_label.c scan-tree-dump optimized "string_255 = "\\\\xff";"
FAIL: gcc.dg/tree-prof/cold_partition_label.c scan-tree-dump optimized "string_28 = "\\\\x1c";"
FAIL: gcc.dg/tree-prof/cold_partition_label.c scan-tree-dump optimized "string_4 = "\\\\4";"
FAIL: gcc.dg/tree-prof/cold_partition_label.c scan-tree-dump optimized "string_51 = "3";"

New passes:
FAIL: gcc.dg/tree-prof/cold_partition_label.c scan-tree-dump-times optimized "63" 1