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Boxiang Sun
cython
Commits
6ca2b4a9
Commit
6ca2b4a9
authored
Jan 11, 2015
by
Stefan Behnel
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simplify some code, add some comments
parent
5297e74b
Changes
1
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1 changed file
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8 additions
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12 deletions
+8
-12
Cython/Compiler/Optimize.py
Cython/Compiler/Optimize.py
+8
-12
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Cython/Compiler/Optimize.py
View file @
6ca2b4a9
...
...
@@ -632,8 +632,7 @@ class IterationTransform(Visitor.EnvTransform):
if
len
(
args
)
<
3
:
step_pos
=
range_function
.
pos
step_value
=
1
step
=
ExprNodes
.
IntNode
(
step_pos
,
value
=
'1'
,
constant_result
=
1
)
step
=
ExprNodes
.
IntNode
(
step_pos
,
value
=
'1'
,
constant_result
=
1
)
else
:
step
=
args
[
2
]
step_pos
=
step
.
pos
...
...
@@ -664,6 +663,7 @@ class IterationTransform(Visitor.EnvTransform):
if
abs_step
!=
1
:
if
(
isinstance
(
bound1
.
constant_result
,
(
int
,
long
))
and
isinstance
(
bound2
.
constant_result
,
(
int
,
long
))):
# calculate final bounds now
if
step_value
<
0
:
begin_value
=
bound2
.
constant_result
end_value
=
bound1
.
constant_result
...
...
@@ -677,6 +677,7 @@ class IterationTransform(Visitor.EnvTransform):
bound1
.
pos
,
value
=
str
(
bound1_value
),
constant_result
=
bound1_value
,
type
=
PyrexTypes
.
spanning_type
(
bound1
.
type
,
bound2
.
type
))
else
:
# evaluate the same expression as above at runtime
bound2_ref_node
=
UtilNodes
.
LetRefNode
(
bound2
)
spanning_type
=
PyrexTypes
.
spanning_type
(
bound1
.
type
,
bound2
.
type
)
spanning_step_type
=
PyrexTypes
.
spanning_type
(
spanning_type
,
step
.
type
)
...
...
@@ -685,19 +686,17 @@ class IterationTransform(Visitor.EnvTransform):
begin_value
=
bound2_ref_node
end_value
=
bound1
final_op
=
'-'
final_node
=
ExprNodes
.
SubNode
else
:
begin_value
=
bound1
end_value
=
bound2_ref_node
final_op
=
'+'
final_node
=
ExprNodes
.
AddNode
bound1
=
final
_node
(
bound1
=
ExprNodes
.
binop
_node
(
bound1
.
pos
,
operand1
=
final
_node
(
operand1
=
ExprNodes
.
binop
_node
(
bound1
.
pos
,
operand1
=
bound2_ref_node
,
operator
=
final_op
,
operator
=
final_op
,
# +/-
operand2
=
ExprNodes
.
MulNode
(
bound1
.
pos
,
operand1
=
ExprNodes
.
IntNode
(
...
...
@@ -731,7 +730,7 @@ class IterationTransform(Visitor.EnvTransform):
type
=
spanning_step_type
),
type
=
spanning_step_type
),
type
=
spanning_step_type
),
operator
=
final_op
,
operator
=
final_op
,
# +/-
operand2
=
ExprNodes
.
IntNode
(
bound1
.
pos
,
value
=
'1'
,
...
...
@@ -747,10 +746,7 @@ class IterationTransform(Visitor.EnvTransform):
if
not
bound2
.
is_literal
:
# stop bound must be immutable => keep it in a temp var
bound2_is_temp
=
True
if
bound2_ref_node
:
bound2
=
bound2_ref_node
else
:
bound2
=
UtilNodes
.
LetRefNode
(
bound2
)
bound2
=
bound2_ref_node
or
UtilNodes
.
LetRefNode
(
bound2
)
else
:
bound2_is_temp
=
False
...
...
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