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from rpython.translator.backendopt.merge_if_blocks import merge_if_blocks_once
from rpython.translator.backendopt.merge_if_blocks import merge_if_blocks
from rpython.translator.backendopt.all import backend_optimizations
from rpython.translator.translator import TranslationContext, graphof as tgraphof
from rpython.flowspace.model import Block, checkgraph
from rpython.translator.backendopt.removenoops import remove_same_as
from rpython.rtyper.llinterp import LLInterpreter
from rpython.rlib.rarithmetic import r_uint, r_ulonglong, r_longlong, r_int
from rpython.annotator.model import SomeChar, SomeUnicodeCodePoint
from rpython.rlib.objectmodel import CDefinedIntSymbolic
def do_test_merge(fn, testvalues):
t = TranslationContext()
a = t.buildannotator()
a.build_types(fn, [type(testvalues[0])])
rtyper = t.buildrtyper()
rtyper.specialize()
graph = tgraphof(t, fn)
assert len(list(graph.iterblocks())) == 4 #startblock, blocks, returnblock
remove_same_as(graph)
merge_if_blocks_once(graph)
assert len(graph.startblock.exits) == 4
assert len(list(graph.iterblocks())) == 2 #startblock, returnblock
interp = LLInterpreter(rtyper)
for i in testvalues:
expected = fn(i)
actual = interp.eval_graph(graph, [i])
assert actual == expected
def test_merge1():
def merge_int(n):
n += 1
if n == 1:
return 1
elif n == 2:
return 2
elif n == 3:
return 3
return 4
do_test_merge(merge_int, range(4))
do_test_merge(merge_int, [r_uint(i) for i in range(4)])
# this has been disabled:
#if r_longlong is not r_int:
# do_test_merge(merge_int, [r_longlong(i) for i in range(4)])
#do_test_merge(merge_int, [r_ulonglong(i) for i in range(4)])
def merge_chr(n):
c = chr(n + 1)
if c == 'a':
return 'a'
elif c == 'b':
return 'b'
elif c == 'c':
return 'c'
return 'd'
do_test_merge(merge_chr, range(96, 101))
def merge_uchr(n):
c = unichr(n + 1)
if c == u'a':
return u'a'
elif c == u'b':
return u'b'
elif c == u'c':
return u'c'
return u'd'
do_test_merge(merge_uchr, range(96, 101))
def test_merge_passonvars():
def merge(n, m):
if n == 1:
return m + 1
elif n == 2:
return m + 2
elif n == 3:
return m + 3
return m + 4
t = TranslationContext()
a = t.buildannotator()
a.build_types(merge, [int, int])
rtyper = t.buildrtyper()
rtyper.specialize()
graph = tgraphof(t, merge)
assert len(list(graph.iterblocks())) == 8
remove_same_as(graph)
merge_if_blocks_once(graph)
assert len(graph.startblock.exits) == 4
interp = LLInterpreter(rtyper)
for i in range(1, 5):
res = interp.eval_graph(graph, [i, 1])
assert res == i + 1
def test_merge_several():
def merge(n, m):
r = -1
if n == 0:
if m == 0:
r = 0
elif m == 1:
r = 1
else:
r = 2
elif n == 1:
r = 4
else:
r = 6
return r
t = TranslationContext()
a = t.buildannotator()
a.build_types(merge, [int, int])
rtyper = t.buildrtyper()
rtyper.specialize()
graph = tgraphof(t, merge)
remove_same_as(graph)
merge_if_blocks(graph)
assert len(graph.startblock.exits) == 3
assert len(list(graph.iterblocks())) == 3
interp = LLInterpreter(rtyper)
for m in range(3):
res = interp.eval_graph(graph, [0, m])
assert res == m
res = interp.eval_graph(graph, [1, 0])
assert res == 4
res = interp.eval_graph(graph, [2, 0])
assert res == 6
def test_merge_with_or():
def merge(n):
if n == 5:
return 4
elif n == 14 or n == 2:
return 16
else:
return 7
do_test_merge(merge, [5, 6, 14, 2, 3, 123])
def test_dont_merge():
def merge(n, m):
r = -1
if n == 0:
r += m
if n == 1:
r += 2 * m
else:
r += 6
return r
t = TranslationContext()
a = t.buildannotator()
a.build_types(merge, [int, int])
rtyper = t.buildrtyper()
rtyper.specialize()
graph = tgraphof(t, merge)
remove_same_as(graph)
blocknum = len(list(graph.iterblocks()))
merge_if_blocks(graph)
assert blocknum == len(list(graph.iterblocks()))
def test_two_constants():
def fn():
r = range(10, 37, 4)
r.reverse()
return r[0]
t = TranslationContext()
a = t.buildannotator()
a.build_types(fn, [])
rtyper = t.buildrtyper()
rtyper.specialize()
backend_optimizations(t, merge_if_blocks=True)
graph = tgraphof(t, fn)
blocknum = len(list(graph.iterblocks()))
merge_if_blocks(graph)
assert blocknum == len(list(graph.iterblocks()))
def test_same_cases():
def fn(x):
if x == 42:
r = 1
elif x == 42:
r = 2
else:
r = 3
return r
t = TranslationContext()
a = t.buildannotator()
a.build_types(fn, [int])
rtyper = t.buildrtyper()
rtyper.specialize()
backend_optimizations(t, merge_if_blocks=True)
graph = tgraphof(t, fn)
assert len(graph.startblock.exits) == 2
interp = LLInterpreter(rtyper)
for i in [42, 43]:
expected = fn(i)
actual = interp.eval_graph(graph, [i])
assert actual == expected
def test_replace_exitswitch_by_constant_bug():
class X:
pass
def constant9():
x = X()
x.n = 3
x.n = 9
return x.n
def fn():
n = constant9()
if n == 1: return 5
elif n == 2: return 6
elif n == 3: return 8
elif n == 4: return -123
elif n == 5: return 12973
else: return n
t = TranslationContext()
a = t.buildannotator()
a.build_types(fn, [])
rtyper = t.buildrtyper()
rtyper.specialize()
graph = t.graphs[0]
remove_same_as(graph)
merge_if_blocks_once(graph)
from rpython.translator.backendopt import malloc, inline
inline.auto_inlining(t, 20)
malloc.remove_mallocs(t, t.graphs)
from rpython.translator import simplify
simplify.join_blocks(graph)
def test_switch_on_symbolic():
symb1 = CDefinedIntSymbolic("1", 1)
symb2 = CDefinedIntSymbolic("2", 2)
symb3 = CDefinedIntSymbolic("3", 3)
def fn(x):
res = 0
if x == symb1:
res += x + 1
elif x == symb2:
res += x + 2
elif x == symb3:
res += x + 3
res += 1
return res
t = TranslationContext()
a = t.buildannotator()
a.build_types(fn, [int])
rtyper = t.buildrtyper()
rtyper.specialize()
graph = t.graphs[0]
remove_same_as(graph)
res = merge_if_blocks_once(graph)
assert not res
checkgraph(graph)
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