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Swap out old llvm code

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Siu Kwan Lam 2013-02-05 15:30:43 -06:00
commit 450c29e052
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llvm/ee.py
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#
# Copyright (c) 2008-10, Mahadevan R All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# * Neither the name of this software, nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
"""Execution Engine and related classes.
"""
import llvm # top-level, for common stuff
import llvm.core as core # module, function etc.
import llvm._core as _core # C wrappers
import llvm._util as _util # utility functions
import logging
import os
logger = logging.getLogger(__name__)
# re-export TargetData for backward compatibility.
from llvm.passes import TargetData
def _detect_avx_support():
'''FIXME: This is a workaround for AVX support.
'''
disable_avx_detect = int(os.environ.get('LLVMPY_DISABLE_AVX_DETECT', 0))
if disable_avx_detect:
return False # enable AVX if user disable AVX detect
force_disable_avx = int(os.environ.get('LLVMPY_FORCE_DISABLE_AVX', 0))
if force_disable_avx:
return True # force disable AVX
# auto-detect avx
try:
for line in open('/proc/cpuinfo'):
if line.lstrip().startswith('flags') and 'avx' in line.split():
# enable AVX if flags contain AVX
return False
except IOError:
pass # disable AVX if no /proc/cpuinfo is found
return True # disable AVX if flags does not have AVX
FORCE_DISABLE_AVX = _detect_avx_support()
#===----------------------------------------------------------------------===
# Enumerations
#===----------------------------------------------------------------------===
BO_BIG_ENDIAN = 0
BO_LITTLE_ENDIAN = 1
# CodeModel
CM_DEFAULT = 0
CM_JITDEFAULT = 1
CM_SMALL = 2
CM_KERNEL = 3
CM_MEDIUM = 4
CM_LARGE = 5
#===----------------------------------------------------------------------===
# Generic value
#===----------------------------------------------------------------------===
class GenericValue(object):
@staticmethod
def int(ty, intval):
core.check_is_type(ty)
ptr = _core.LLVMCreateGenericValueOfInt(ty.ptr, intval, 0)
return GenericValue(ptr)
@staticmethod
def int_signed(ty, intval):
core.check_is_type(ty)
ptr = _core.LLVMCreateGenericValueOfInt(ty.ptr, intval, 1)
return GenericValue(ptr)
@staticmethod
def real(ty, floatval):
core.check_is_type(ty) # only float or double
ptr = _core.LLVMCreateGenericValueOfFloat(ty.ptr, floatval)
return GenericValue(ptr)
@staticmethod
def pointer(*args):
'''
One argument version takes (addr).
Two argument version takes (ty, addr). [Deprecated]
`ty` is unused.
`addr` is an integer representing an address.
TODO: remove two argument version.
'''
if len(args)==2:
logger.warning("Deprecated: Two argument version of "
"GenericValue.pointer() is deprecated.")
addr = args[1]
elif len(args)!=1:
raise TypeError("pointer() takes 1 or 2 arguments.")
else:
addr = args[0]
ptr = _core.LLVMCreateGenericValueOfPointer(addr)
return GenericValue(ptr)
def __init__(self, ptr):
self.ptr = ptr
def __del__(self):
_core.LLVMDisposeGenericValue(self.ptr)
def as_int(self):
return _core.LLVMGenericValueToInt(self.ptr, 0)
def as_int_signed(self):
return _core.LLVMGenericValueToInt(self.ptr, 1)
def as_real(self, ty):
core.check_is_type(ty) # only float or double
return _core.LLVMGenericValueToFloat(ty.ptr, self.ptr)
def as_pointer(self):
return _core.LLVMGenericValueToPointer(self.ptr)
# helper functions for generic value objects
def check_is_generic_value(obj): _util.check_gen(obj, GenericValue)
def _unpack_generic_values(objlist):
return _util.unpack_gen(objlist, check_is_generic_value)
#===----------------------------------------------------------------------===
# Engine builder
#===----------------------------------------------------------------------===
class EngineBuilder(object):
@staticmethod
def new(module):
core.check_is_module(module)
_util.check_is_unowned(module)
obj = _core.LLVMCreateEngineBuilder(module.ptr)
return EngineBuilder(obj, module)
def __init__(self, ptr, module):
self.ptr = ptr
self._module = module
self.__has_mattrs = False
def __del__(self):
_core.LLVMDisposeEngineBuilder(self.ptr)
def force_jit(self):
_core.LLVMEngineBuilderForceJIT(self.ptr)
return self
def force_interpreter(self):
_core.LLVMEngineBuilderForceInterpreter(self.ptr)
return self
def opt(self, level):
'''
level valid [0, 1, 2, 3] -- [None, Less, Default, Aggressive]
'''
assert level in range(4)
_core.LLVMEngineBuilderSetOptLevel(self.ptr, level)
return self
def mattrs(self, string):
'''set machine attributes as a comma/space separated string
e.g: +sse,-3dnow
'''
self.__has_mattrs = True
if FORCE_DISABLE_AVX:
if 'avx' not in map(lambda x: x.strip(), string.split(',')):
# User did not override
string += ',-avx'
_core.LLVMEngineBuilderSetMAttrs(self.ptr, string.replace(',', ' '))
return self
def create(self, tm=None):
'''
tm --- Optional. Provide a TargetMachine. Ownership is transfered
to the returned execution engine.
'''
if not self.__has_mattrs and FORCE_DISABLE_AVX:
self.mattrs('-avx')
if tm:
_util.check_is_unowned(tm)
ret = _core.LLVMEngineBuilderCreateTM(self.ptr, tm.ptr)
else:
ret = _core.LLVMEngineBuilderCreate(self.ptr)
if isinstance(ret, str):
raise llvm.LLVMException(ret)
engine = ExecutionEngine(ret, self._module)
if tm:
tm._own(owner=llvm.DummyOwner)
return engine
def select_target(self):
'''get the corresponding target machine
'''
ptr = _core.LLVMTargetMachineFromEngineBuilder(self.ptr)
return TargetMachine(ptr)
#===----------------------------------------------------------------------===
# Execution engine
#===----------------------------------------------------------------------===
class ExecutionEngine(object):
@staticmethod
def new(module, force_interpreter=False):
eb = EngineBuilder.new(module)
if force_interpreter:
eb.force_interpreter()
return eb.create()
def __init__(self, ptr, module):
self.ptr = ptr
module._own(self)
def __del__(self):
_core.LLVMDisposeExecutionEngine(self.ptr)
def disable_lazy_compilation(self, disabled=True):
_core.LLVMExecutionEngineDisableLazyCompilation(self.ptr,
int(bool(disabled)))
def run_function(self, fn, args):
core.check_is_function(fn)
ptrs = _unpack_generic_values(args)
gvptr = _core.LLVMRunFunction2(self.ptr, fn.ptr, ptrs)
return GenericValue(gvptr)
def get_pointer_to_function(self, fn):
core.check_is_function(fn)
return _core.LLVMGetPointerToFunction(self.ptr,fn.ptr)
def get_pointer_to_global(self, val):
core.check_is_global_value(val)
return _core.LLVMGetPointerToGlobal(self.ptr, val.ptr)
def add_global_mapping(self, gvar, addr):
assert addr >= 0, "Address cannot not be negative"
_core.LLVMAddGlobalMapping(self.ptr, gvar.ptr, addr)
def run_static_ctors(self):
_core.LLVMRunStaticConstructors(self.ptr)
def run_static_dtors(self):
_core.LLVMRunStaticDestructors(self.ptr)
def free_machine_code_for(self, fn):
core.check_is_function(fn)
_core.LLVMFreeMachineCodeForFunction(self.ptr, fn.ptr)
def add_module(self, module):
core.check_is_module(module)
_core.LLVMAddModule(self.ptr, module.ptr)
module._own(self)
def remove_module(self, module):
core.check_is_module(module)
if module.owner != self:
raise llvm.LLVMException("module is not owned by self")
ret = _core.LLVMRemoveModule2(self.ptr, module.ptr)
if isinstance(ret, str):
raise llvm.LLVMException(ret)
return core.Module(ret)
@property
def target_data(self):
td = TargetData(_core.LLVMGetExecutionEngineTargetData(self.ptr))
td._own(self)
return td
#===----------------------------------------------------------------------===
# Target machine
#===----------------------------------------------------------------------===
def print_registered_targets():
'''
Note: print directly to stdout
'''
_core.LLVMPrintRegisteredTargetsForVersion()
def get_host_cpu_name():
'''return the string name of the host CPU
'''
return _core.LLVMGetHostCPUName()
def get_default_triple():
'''return the target triple of the host in str-rep
'''
return _core.LLVMDefaultTargetTriple()
class TargetMachine(llvm.Ownable):
@staticmethod
def new(triple='', cpu='', features='', opt=2, cm=CM_DEFAULT):
if not triple and not cpu:
triple = get_default_triple()
cpu = get_host_cpu_name()
ptr = _core.LLVMCreateTargetMachine(triple, cpu, features, opt, cm)
return TargetMachine(ptr)
@staticmethod
def lookup(arch, cpu='', features='', opt=2, cm=CM_DEFAULT):
'''create a targetmachine given an architecture name
For a list of architectures,
use: `llc -help`
For a list of available CPUs,
use: `llvm-as < /dev/null | llc -march=xyz -mcpu=help`
For a list of available attributes (features),
use: `llvm-as < /dev/null | llc -march=xyz -mattr=help`
'''
ptr = _core.LLVMTargetMachineLookup(arch, cpu, features, opt, cm)
return TargetMachine(ptr)
def __init__(self, ptr):
llvm.Ownable.__init__(self, ptr, _core.LLVMDisposeTargetMachine)
def emit_assembly(self, module):
'''returns byte string of the module as assembly code of the target machine
'''
return _core.LLVMTargetMachineEmitFile(self.ptr, module.ptr, True)
def emit_object(self, module):
'''returns byte string of the module as native code of the target machine
'''
return _core.LLVMTargetMachineEmitFile(self.ptr, module.ptr, False)
@property
def target_data(self):
'''get target data of this machine
'''
ptr = _core.LLVMTargetMachineGetTargetData(self.ptr)
td = TargetData(ptr)
td._own(self)
return td
@property
def target_name(self):
return _core.LLVMTargetMachineGetTargetName(self.ptr)
@property
def target_short_description(self):
return _core.LLVMTargetMachineGetTargetShortDescription(self.ptr)
@property
def triple(self):
return _core.LLVMTargetMachineGetTriple(self.ptr)
@property
def cpu(self):
return _core.LLVMTargetMachineGetCPU(self.ptr)
@property
def feature_string(self):
return _core.LLVMTargetMachineGetFS(self.ptr)