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https://github.com/c64scene-ar/llvm-6502.git
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14ef491582
use these to add support for C++ static ctors/dtors to the Orc-lazy JIT in LLI. Replace the trivial_retval_1 regression test - the new 'hello' test is covering strictly more code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233885 91177308-0d34-0410-b5e6-96231b3b80d8
70 lines
2.3 KiB
C++
70 lines
2.3 KiB
C++
//===------ OrcLazyJIT.cpp - Basic Orc-based JIT for lazy execution -------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "OrcLazyJIT.h"
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#include "llvm/ExecutionEngine/Orc/OrcTargetSupport.h"
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#include "llvm/Support/DynamicLibrary.h"
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using namespace llvm;
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OrcLazyJIT::CallbackManagerBuilder
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OrcLazyJIT::createCallbackManagerBuilder(Triple T) {
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switch (T.getArch()) {
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default: return nullptr;
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case Triple::x86_64: {
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typedef orc::JITCompileCallbackManager<CompileLayerT,
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orc::OrcX86_64> CCMgrT;
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return [](CompileLayerT &CompileLayer, RuntimeDyld::MemoryManager &MemMgr,
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LLVMContext &Context) {
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return make_unique<CCMgrT>(CompileLayer, MemMgr, Context, 0, 64);
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};
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}
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}
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}
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int llvm::runOrcLazyJIT(std::unique_ptr<Module> M, int ArgC, char* ArgV[]) {
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// Add the program's symbols into the JIT's search space.
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if (sys::DynamicLibrary::LoadLibraryPermanently(nullptr)) {
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errs() << "Error loading program symbols.\n";
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return 1;
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}
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// Grab a target machine and try to build a factory function for the
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// target-specific Orc callback manager.
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auto TM = std::unique_ptr<TargetMachine>(EngineBuilder().selectTarget());
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auto &Context = getGlobalContext();
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auto CallbackMgrBuilder =
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OrcLazyJIT::createCallbackManagerBuilder(Triple(TM->getTargetTriple()));
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// If we couldn't build the factory function then there must not be a callback
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// manager for this target. Bail out.
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if (!CallbackMgrBuilder) {
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errs() << "No callback manager available for target '"
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<< TM->getTargetTriple() << "'.\n";
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return 1;
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}
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// Everything looks good. Build the JIT.
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OrcLazyJIT J(std::move(TM), Context, CallbackMgrBuilder);
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// Add the module, look up main and run it.
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auto MainHandle = J.addModule(std::move(M));
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auto MainSym = J.findSymbolIn(MainHandle, "main");
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if (!MainSym) {
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errs() << "Could not find main function.\n";
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return 1;
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}
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typedef int (*MainFnPtr)(int, char*[]);
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auto Main = OrcLazyJIT::fromTargetAddress<MainFnPtr>(MainSym.getAddress());
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return Main(ArgC, ArgV);
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}
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