87 lines
5.2 KiB
Python
87 lines
5.2 KiB
Python
import ctypes, platform, sys, subprocess
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from tinygrad.device import Compiler
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from tinygrad.helpers import OSX, getenv, capstone_flatdump, DEBUG
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from tinygrad.runtime.support.elf import jit_loader
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try: import tinygrad.runtime.autogen.llvm as llvm
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except (ImportError, FileNotFoundError): llvm = None #type:ignore[assignment]
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class ClangJITCompiler(Compiler):
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def __init__(self, cachekey="compile_clang_jit"): super().__init__(cachekey)
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def compile(self, src:str) -> bytes:
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# -fno-math-errno is required for __builtin_sqrt to become an instruction instead of a function call
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# x18 is a reserved platform register. It is clobbered on context switch in macos and is used to store TEB pointer in windows on arm, don't use it
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target = 'x86_64' if sys.platform == 'win32' else platform.machine()
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# on arm march means "runs on this arch and superset" instead of "optimize for this arch". x86 march == arm mcpu
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arch = {'x86_64': '-march=native', 'AMD64': '-march=native', 'riscv64': '-march=rv64g'}.get(platform.machine(), "-mcpu=native")
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args = [arch, f'--target={target}-none-unknown-elf', '-O2', '-fPIC', '-ffreestanding', '-fno-math-errno', '-nostdlib', '-fno-ident']
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arch_args = ['-ffixed-x18'] if target == 'arm64' else []
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obj = subprocess.check_output([getenv("CC", 'clang'), '-c', '-x', 'c', *args, *arch_args, '-', '-o', '-'], input=src.encode('utf-8'))
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return jit_loader(obj)
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def disassemble(self, lib:bytes): return capstone_flatdump(lib)
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def cerr(): return ctypes.pointer(ctypes.pointer(ctypes.c_char()))
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def expect(x, err, ret=None):
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if x: raise RuntimeError(llvm.string_cast(err.contents) if not isinstance(err, str) else err)
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return ret
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class LLVMCompiler(Compiler):
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jit = True
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target_arch = {'arm64': 'AArch64', 'aarch64': 'AArch64', 'x86_64': 'X86', 'AMD64': 'X86', 'riscv64': 'riscv64'}[platform.machine()]
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def __init__(self, processor:str, feats:str):
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for component in ['Target', 'TargetInfo', 'TargetMC', 'AsmParser', 'AsmPrinter']: getattr(llvm, f'LLVMInitialize{self.target_arch}{component}')()
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triple = {'AArch64': b'aarch64-none-unknown-elf', 'X86': b'x86_64-none-unknown-elf', 'AMDGPU': b'amdgcn-amd-amdhsa'}[self.target_arch]
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target = expect(llvm.LLVMGetTargetFromTriple(triple, ctypes.pointer(tgt:=llvm.LLVMTargetRef()), err:=cerr()), err, tgt)
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if DEBUG >= 3: print(f"LLVM init for {processor!r} with {feats!r}")
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self.target_machine = llvm.LLVMCreateTargetMachine(target, triple, processor.encode(), feats.encode(),
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llvm.LLVMCodeGenLevelDefault, llvm.LLVMRelocPIC, llvm.LLVMCodeModelDefault)
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self.pbo = llvm.LLVMCreatePassBuilderOptions()
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if (opt:=bool(getenv("LLVMOPT", "1"))):
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self.passes = b'default<O2>'
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llvm.LLVMPassBuilderOptionsSetLoopUnrolling(self.pbo, True)
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llvm.LLVMPassBuilderOptionsSetLoopVectorization(self.pbo, True)
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llvm.LLVMPassBuilderOptionsSetSLPVectorization(self.pbo, True)
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llvm.LLVMPassBuilderOptionsSetVerifyEach(self.pbo, True)
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else:
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self.passes = b'default<O0>'
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self.diag_msgs: list[str] = []
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@ctypes.CFUNCTYPE(None, llvm.LLVMDiagnosticInfoRef, ctypes.c_void_p)
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def handle_diag(diag_ref, _arg):
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severity = llvm.LLVMGetDiagInfoSeverity(diag_ref)
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msg = ctypes.string_at(llvm.LLVMGetDiagInfoDescription(diag_ref)).decode()
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if severity == llvm.LLVMDSError:
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self.diag_msgs.append(msg)
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self.handle_diag = handle_diag
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llvm.LLVMContextSetDiagnosticHandler(llvm.LLVMGetGlobalContext(), handle_diag, None)
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super().__init__(f"compile_llvm_{self.target_arch}{'_jit' if self.jit else ''}{'_opt' if opt else ''}")
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def __del__(self): llvm.LLVMDisposePassBuilderOptions(self.pbo)
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def compile(self, src:str) -> bytes:
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self.diag_msgs.clear()
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src_buf = llvm.LLVMCreateMemoryBufferWithMemoryRangeCopy(ctypes.create_string_buffer(src_bytes:=src.encode()), len(src_bytes), b'src')
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mod = expect(llvm.LLVMParseIRInContext(llvm.LLVMGetGlobalContext(), src_buf, ctypes.pointer(m:=llvm.LLVMModuleRef()), err:=cerr()), err, m)
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expect(llvm.LLVMVerifyModule(mod, llvm.LLVMReturnStatusAction, err:=cerr()), err)
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expect(llvm.LLVMRunPasses(mod, self.passes, self.target_machine, self.pbo), 'failed to run passes')
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if DEBUG >= 7: print(ctypes.string_at(llvm.LLVMPrintModuleToString(mod)).decode())
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obj_buf = expect(llvm.LLVMTargetMachineEmitToMemoryBuffer(self.target_machine, mod, llvm.LLVMObjectFile, err:=cerr(),
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ctypes.pointer(buf:=llvm.LLVMMemoryBufferRef())), err, buf)
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llvm.LLVMDisposeModule(mod)
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obj = ctypes.string_at(llvm.LLVMGetBufferStart(obj_buf), llvm.LLVMGetBufferSize(obj_buf))
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llvm.LLVMDisposeMemoryBuffer(obj_buf)
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if self.diag_msgs: raise RuntimeError("llvm diagnostic: " + "\n".join(self.diag_msgs))
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return jit_loader(obj) if self.jit else obj
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def disassemble(self, lib:bytes): capstone_flatdump(lib)
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class CPULLVMCompiler(LLVMCompiler):
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def __init__(self):
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# +reserve-x18 here does the same thing as -ffixed-x18 in ops_cpu.py, see comments there for why it's needed on arm osx
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cpu, feats = ctypes.string_at(llvm.LLVMGetHostCPUName()), (b'+reserve-x18,' if OSX else b'') + ctypes.string_at(llvm.LLVMGetHostCPUFeatures())
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super().__init__(cpu.decode(), feats.decode())
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