[PATCH v2 0/3] some attr optimizations

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

v2 updates 01/03 (rename the local var to avoid shadowing instead) and
merges 02/04 and 04/04 to 03/03.

Nguyễn Thái Ngọc Duy (3):
  attr.c: rename arg name attr_nr to avoid shadowing the global one
  attr: do not attempt to expand when we know it's not a macro
  attr: avoid heavy work when we know the specified attr is not defined

 attr.c | 47 +++++++++++++++++++++++++++++++++++++----------
 1 file changed, 37 insertions(+), 10 deletions(-)

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2.2.0.84.ge9c7a8a