def test_object_alignment(self):
# all objects returned by the GC should be properly aligned.
from pypy.rpython.lltypesystem import rffi
from pypy.rpython.tool import rffi_platform
mylist = ['a', 'bc', '84139871', 'ajkdh', '876']
def f():
result = 0
buffer = ""
for j in range(100):
for s in mylist:
buffer += s
addr = rffi.cast(lltype.Signed, buffer)
result |= addr
return result
fn = self.getcompiled(f)
res = fn()
expected_alignment = rffi_platform.memory_alignment()
assert (res & (expected_alignment-1)) == 0
def test_object_alignment(self):
# all objects returned by the GC should be properly aligned.
from pypy.rpython.lltypesystem import rffi
from pypy.rpython.tool import rffi_platform
mylist = ['a', 'bc', '84139871', 'ajkdh', '876']
def f():
result = 0
buffer = ""
for j in range(100):
for s in mylist:
buffer += s
addr = rffi.cast(lltype.Signed, buffer)
result |= addr
return result
fn = self.getcompiled(f)
res = fn()
expected_alignment = rffi_platform.memory_alignment()
assert (res & (expected_alignment-1)) == 0
def repr_offset(self, value):
if isinstance(value, llarena.RoundedUpForAllocation):
# XXX not supported when used in a CompositeOffset
from pypy.rpython.tool import rffi_platform
align = rffi_platform.memory_alignment()
r_basesize = self.repr_offset(value.basesize)
# Note that the following expression is known to crash 'llc';
# you may need to upgrade llvm.
return "and(i32 add(i32 %s, i32 %d), i32 %d)" % (
r_basesize, align-1, ~(align-1))
from_, indices, to = self.get_offset(value, [])
if from_ is lltype.Void or not indices:
return "0"
assert to is not lltype.Void
r = self.database.repr_type
indices_as_str = ", ".join("%s %s" % (w, i) for w, i in indices)
return "ptrtoint(%s* getelementptr(%s* null, %s) to i32)" % (r(to),
r(from_),
indices_as_str)
def test_object_alignment(self):
res = self.run('object_alignment')
from pypy.rpython.tool import rffi_platform
expected_alignment = rffi_platform.memory_alignment()
assert (res & (expected_alignment-1)) == 0
def test_object_alignment(self):
res = self.run('object_alignment')
from pypy.rpython.tool import rffi_platform
expected_alignment = rffi_platform.memory_alignment()
assert (res & (expected_alignment-1)) == 0
def test_memory_alignment():
a = rffi_platform.memory_alignment()
print a
assert a % struct.calcsize("P") == 0
def test_memory_alignment():
a = rffi_platform.memory_alignment()
print a
assert a % struct.calcsize("P") == 0