--- /dev/null
+//===-- MCJIT.h - MC-Based Just-In-Time Execution Engine --------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file forces the MCJIT to link in on certain operating systems.
+// (Windows).
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_EXECUTION_ENGINE_MCJIT_H
+#define LLVM_EXECUTION_ENGINE_MCJIT_H
+
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
+#include <cstdlib>
+
+extern "C" void LLVMLinkInMCJIT();
+
+namespace {
+ struct ForceMCJITLinking {
+ ForceMCJITLinking() {
+ // We must reference the passes in such a way that compilers will not
+ // delete it all as dead code, even with whole program optimization,
+ // yet is effectively a NO-OP. As the compiler isn't smart enough
+ // to know that getenv() never returns -1, this will do the job.
+ if (std::getenv("bar") != (char*) -1)
+ return;
+
+ LLVMLinkInMCJIT();
+ }
+ } ForceMCJITLinking;
+}
+
+#endif
--- /dev/null
+add_llvm_library(LLVMMCJIT
+ MCJIT.cpp
+ TargetSelect.cpp
+ )
--- /dev/null
+//===-- JIT.cpp - MC-based Just-in-Time Compiler --------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "MCJIT.h"
+#include "llvm/ExecutionEngine/GenericValue.h"
+#include "llvm/ExecutionEngine/MCJIT.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/System/DynamicLibrary.h"
+
+using namespace llvm;
+
+namespace {
+
+static struct RegisterJIT {
+ RegisterJIT() { MCJIT::Register(); }
+} JITRegistrator;
+
+}
+
+extern "C" void LLVMLinkInMCJIT() {
+}
+
+ExecutionEngine *MCJIT::createJIT(Module *M,
+ std::string *ErrorStr,
+ JITMemoryManager *JMM,
+ CodeGenOpt::Level OptLevel,
+ bool GVsWithCode,
+ CodeModel::Model CMM,
+ StringRef MArch,
+ StringRef MCPU,
+ const SmallVectorImpl<std::string>& MAttrs) {
+ // Try to register the program as a source of symbols to resolve against.
+ //
+ // FIXME: Don't do this here.
+ sys::DynamicLibrary::LoadLibraryPermanently(0, NULL);
+
+ // Pick a target either via -march or by guessing the native arch.
+ //
+ // FIXME: This should be lifted out of here, it isn't something which should
+ // be part of the JIT policy, rather the burden for this selection should be
+ // pushed to clients.
+ TargetMachine *TM = MCJIT::selectTarget(M, MArch, MCPU, MAttrs, ErrorStr);
+ if (!TM || (ErrorStr && ErrorStr->length() > 0)) return 0;
+ TM->setCodeModel(CMM);
+
+ // If the target supports JIT code generation, create the JIT.
+ if (TargetJITInfo *TJ = TM->getJITInfo())
+ return new MCJIT(M, *TM, *TJ, JMM, OptLevel, GVsWithCode);
+
+ if (ErrorStr)
+ *ErrorStr = "target does not support JIT code generation";
+ return 0;
+}
+
+MCJIT::MCJIT(Module *M, TargetMachine &tm, TargetJITInfo &tji,
+ JITMemoryManager *JMM, CodeGenOpt::Level OptLevel,
+ bool AllocateGVsWithCode)
+ : ExecutionEngine(M) {
+}
+
+MCJIT::~MCJIT() {
+}
+
+void *MCJIT::getPointerToBasicBlock(BasicBlock *BB) {
+ report_fatal_error("not yet implemented");
+ return 0;
+}
+
+void *MCJIT::getPointerToFunction(Function *F) {
+ report_fatal_error("not yet implemented");
+ return 0;
+}
+
+void *MCJIT::recompileAndRelinkFunction(Function *F) {
+ report_fatal_error("not yet implemented");
+}
+
+void MCJIT::freeMachineCodeForFunction(Function *F) {
+ report_fatal_error("not yet implemented");
+}
+
+GenericValue MCJIT::runFunction(Function *F,
+ const std::vector<GenericValue> &ArgValues) {
+ report_fatal_error("not yet implemented");
+ return GenericValue();
+}
--- /dev/null
+//===-- MCJIT.h - Class definition for the MCJIT ----------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_EXECUTIONENGINE_MCJIT_H
+#define LLVM_LIB_EXECUTIONENGINE_MCJIT_H
+
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
+
+namespace llvm {
+
+class MCJIT : public ExecutionEngine {
+ MCJIT(Module *M, TargetMachine &tm, TargetJITInfo &tji,
+ JITMemoryManager *JMM, CodeGenOpt::Level OptLevel,
+ bool AllocateGVsWithCode);
+public:
+ ~MCJIT();
+
+ /// @name ExecutionEngine interface implementation
+ /// @{
+
+ virtual void *getPointerToBasicBlock(BasicBlock *BB);
+
+ virtual void *getPointerToFunction(Function *F);
+
+ virtual void *recompileAndRelinkFunction(Function *F);
+
+ virtual void freeMachineCodeForFunction(Function *F);
+
+ virtual GenericValue runFunction(Function *F,
+ const std::vector<GenericValue> &ArgValues);
+
+ /// @}
+ /// @name (Private) Registration Interfaces
+ /// @{
+
+ static void Register() {
+ MCJITCtor = createJIT;
+ }
+
+ // FIXME: This routine is scheduled for termination. Do not use it.
+ static TargetMachine *selectTarget(Module *M,
+ StringRef MArch,
+ StringRef MCPU,
+ const SmallVectorImpl<std::string>& MAttrs,
+ std::string *Err);
+
+ static ExecutionEngine *createJIT(Module *M,
+ std::string *ErrorStr,
+ JITMemoryManager *JMM,
+ CodeGenOpt::Level OptLevel,
+ bool GVsWithCode,
+ CodeModel::Model CMM,
+ StringRef MArch,
+ StringRef MCPU,
+ const SmallVectorImpl<std::string>& MAttrs);
+
+ // @}
+};
+
+} // End llvm namespace
+
+#endif
--- /dev/null
+##===- lib/ExecutionEngine/MCJIT/Makefile ------------------*- Makefile -*-===##
+#
+# The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../../..
+LIBRARYNAME = LLVMMCJIT
+
+include $(LEVEL)/Makefile.common
--- /dev/null
+//===-- TargetSelect.cpp - Target Chooser Code ----------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This just asks the TargetRegistry for the appropriate JIT to use, and allows
+// the user to specify a specific one on the commandline with -march=x. Clients
+// should initialize targets prior to calling createJIT.
+//
+//===----------------------------------------------------------------------===//
+
+#include "MCJIT.h"
+#include "llvm/Module.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/System/Host.h"
+#include "llvm/Target/SubtargetFeature.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetRegistry.h"
+using namespace llvm;
+
+/// selectTarget - Pick a target either via -march or by guessing the native
+/// arch. Add any CPU features specified via -mcpu or -mattr.
+TargetMachine *MCJIT::selectTarget(Module *Mod,
+ StringRef MArch,
+ StringRef MCPU,
+ const SmallVectorImpl<std::string>& MAttrs,
+ std::string *ErrorStr) {
+ Triple TheTriple(Mod->getTargetTriple());
+ if (TheTriple.getTriple().empty())
+ TheTriple.setTriple(sys::getHostTriple());
+
+ // Adjust the triple to match what the user requested.
+ const Target *TheTarget = 0;
+ if (!MArch.empty()) {
+ for (TargetRegistry::iterator it = TargetRegistry::begin(),
+ ie = TargetRegistry::end(); it != ie; ++it) {
+ if (MArch == it->getName()) {
+ TheTarget = &*it;
+ break;
+ }
+ }
+
+ if (!TheTarget) {
+ *ErrorStr = "No available targets are compatible with this -march, "
+ "see -version for the available targets.\n";
+ return 0;
+ }
+
+ // Adjust the triple to match (if known), otherwise stick with the
+ // module/host triple.
+ Triple::ArchType Type = Triple::getArchTypeForLLVMName(MArch);
+ if (Type != Triple::UnknownArch)
+ TheTriple.setArch(Type);
+ } else {
+ std::string Error;
+ TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), Error);
+ if (TheTarget == 0) {
+ if (ErrorStr)
+ *ErrorStr = Error;
+ return 0;
+ }
+ }
+
+ if (!TheTarget->hasJIT()) {
+ errs() << "WARNING: This target JIT is not designed for the host you are"
+ << " running. If bad things happen, please choose a different "
+ << "-march switch.\n";
+ }
+
+ // Package up features to be passed to target/subtarget
+ std::string FeaturesStr;
+ if (!MCPU.empty() || !MAttrs.empty()) {
+ SubtargetFeatures Features;
+ Features.setCPU(MCPU);
+ for (unsigned i = 0; i != MAttrs.size(); ++i)
+ Features.AddFeature(MAttrs[i]);
+ FeaturesStr = Features.getString();
+ }
+
+ // Allocate a target...
+ TargetMachine *Target =
+ TheTarget->createTargetMachine(TheTriple.getTriple(), FeaturesStr);
+ assert(Target && "Could not allocate target machine!");
+ return Target;
+}
##===----------------------------------------------------------------------===##
LEVEL = ../..
LIBRARYNAME = LLVMExecutionEngine
-PARALLEL_DIRS = Interpreter JIT
+PARALLEL_DIRS = Interpreter JIT MCJIT
include $(LEVEL)/Makefile.common
LEVEL := ../..
TOOLNAME := lli
-LINK_COMPONENTS := jit interpreter nativecodegen bitreader asmparser selectiondag
+LINK_COMPONENTS := mcjit jit interpreter nativecodegen bitreader asmparser selectiondag
# Enable JIT support
include $(LEVEL)/Makefile.common
#include "llvm/ExecutionEngine/Interpreter.h"
#include "llvm/ExecutionEngine/JIT.h"
#include "llvm/ExecutionEngine/JITEventListener.h"
+#include "llvm/ExecutionEngine/MCJIT.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/IRReader.h"
#include "llvm/Support/ManagedStatic.h"
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