From 81956ebf81ee739aa4a8768913c240a8cbe3b673 Mon Sep 17 00:00:00 2001
From: Andreas Kloeckner <inform@tiker.net>
Date: Tue, 18 Jun 2013 20:30:10 -0400
Subject: [PATCH] PEP8 isl_helpers

---
 loopy/isl_helpers.py | 42 ++++++++----------------------------------
 1 file changed, 8 insertions(+), 34 deletions(-)

diff --git a/loopy/isl_helpers.py b/loopy/isl_helpers.py
index a83564f48..ec18a1b9b 100644
--- a/loopy/isl_helpers.py
+++ b/loopy/isl_helpers.py
@@ -25,15 +25,10 @@ THE SOFTWARE.
 """
 
 
-
-
 import islpy as isl
 from islpy import dim_type
 
 
-
-
-
 def block_shift_constraint(cns, type, pos, multiple, as_equality=None):
     if as_equality != cns.is_equality():
         if as_equality:
@@ -49,9 +44,6 @@ def block_shift_constraint(cns, type, pos, multiple, as_equality=None):
     return cns
 
 
-
-
-
 def negate_constraint(cns):
     assert not cns.is_equality()
     # FIXME hackety hack
@@ -60,15 +52,15 @@ def negate_constraint(cns):
     my_set = my_set.complement()
 
     results = []
+
     def examine_basic_set(s):
         s.foreach_constraint(results.append)
+
     my_set.foreach_basic_set(examine_basic_set)
     result, = results
     return result
 
 
-
-
 def make_index_map(set, index_expr):
     from loopy.symbolic import eq_constraint_from_expr
 
@@ -93,9 +85,6 @@ def make_index_map(set, index_expr):
     return amap
 
 
-
-
-
 def pw_aff_to_aff(pw_aff):
     if isinstance(pw_aff, isl.Aff):
         return pw_aff
@@ -118,15 +107,11 @@ def pw_aff_to_aff(pw_aff):
     return pieces[0][1]
 
 
-
-
 def dump_space(ls):
     return " ".join("%s: %d" % (dt, ls.dim(getattr(dim_type, dt)))
             for dt in dim_type.names)
 
 
-
-
 def make_slab(space, iname, start, stop):
     zero = isl.Aff.zero_on_domain(space)
 
@@ -144,8 +129,10 @@ def make_slab(space, iname, start, stop):
     if isinstance(stop, Expression):
         stop = aff_from_expr(space, stop)
 
-    if isinstance(start, int): start = zero + start
-    if isinstance(stop, int): stop = zero + stop
+    if isinstance(start, int):
+        start = zero + start
+    if isinstance(stop, int):
+        stop = zero + stop
 
     if isinstance(iname, str):
         iname_dt, iname_idx = zero.get_space().get_var_dict()[iname]
@@ -165,8 +152,6 @@ def make_slab(space, iname, start, stop):
     return result
 
 
-
-
 def iname_rel_aff(space, iname, rel, aff):
     """*aff*'s domain space is allowed to not match *space*."""
 
@@ -188,8 +173,6 @@ def iname_rel_aff(space, iname, rel, aff):
         raise ValueError("unknown value of 'rel': %s" % rel)
 
 
-
-
 def static_extremum_of_pw_aff(pw_aff, constants_only, set_method, what, context):
     pieces = pw_aff.get_pieces()
     if len(pieces) == 1:
@@ -228,23 +211,21 @@ def static_extremum_of_pw_aff(pw_aff, constants_only, set_method, what, context)
             % (what, pw_aff))
 
 
-
-
 def static_min_of_pw_aff(pw_aff, constants_only, context=None):
     return static_extremum_of_pw_aff(pw_aff, constants_only, isl.PwAff.ge_set,
             "minimum", context)
 
+
 def static_max_of_pw_aff(pw_aff, constants_only, context=None):
     return static_extremum_of_pw_aff(pw_aff, constants_only, isl.PwAff.le_set,
             "maximum", context)
 
+
 def static_value_of_pw_aff(pw_aff, constants_only, context=None):
     return static_extremum_of_pw_aff(pw_aff, constants_only, isl.PwAff.eq_set,
             "value", context)
 
 
-
-
 def duplicate_axes(isl_obj, duplicate_inames, new_inames):
     if isinstance(isl_obj, list):
         return [
@@ -293,9 +274,6 @@ def duplicate_axes(isl_obj, duplicate_inames, new_inames):
     return moved_dims.intersect(more_dims)
 
 
-
-
-
 def is_nonnegative(expr, over_set):
     space = over_set.get_space()
     from loopy.symbolic import aff_from_expr
@@ -309,8 +287,6 @@ def is_nonnegative(expr, over_set):
     return over_set.intersect(expr_neg_set).is_empty()
 
 
-
-
 def convexify(domain):
     """Try a few ways to get *domain* to be a BasicSet, i.e.
     explicitly convex.
@@ -348,8 +324,6 @@ def convexify(domain):
     raise NotImplementedError("Could not find convex representation of set")
 
 
-
-
 def boxify(cache_manager, domain, box_inames, context):
     var_dict = domain.get_var_dict(dim_type.set)
     box_iname_indices = [var_dict[iname][1] for iname in box_inames]
-- 
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