-//===-- JIT.cpp - MC-based Just-in-Time Compiler --------------------------===//
+//===-- MCJIT.cpp - MC-based Just-in-Time Compiler ------------------------===//
//
// The LLVM Compiler Infrastructure
//
//===----------------------------------------------------------------------===//
#include "MCJIT.h"
+#include "MCJITMemoryManager.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Function.h"
#include "llvm/ExecutionEngine/GenericValue.h"
#include "llvm/ExecutionEngine/MCJIT.h"
+#include "llvm/ExecutionEngine/JITMemoryManager.h"
+#include "llvm/MC/MCAsmInfo.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/DynamicLibrary.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Target/TargetData.h"
using namespace llvm;
JITMemoryManager *JMM,
CodeGenOpt::Level OptLevel,
bool GVsWithCode,
- CodeModel::Model CMM,
- StringRef MArch,
- StringRef MCPU,
- const SmallVectorImpl<std::string>& MAttrs) {
+ TargetMachine *TM) {
// 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);
+ return new MCJIT(M, TM, *TJ, new MCJITMemoryManager(JMM, M), 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,
+MCJIT::MCJIT(Module *m, TargetMachine *tm, TargetJITInfo &tji,
+ RTDyldMemoryManager *MM, CodeGenOpt::Level OptLevel,
bool AllocateGVsWithCode)
- : ExecutionEngine(M) {
+ : ExecutionEngine(m), TM(tm), MemMgr(MM), M(m), OS(Buffer), Dyld(MM) {
+
+ PM.add(new TargetData(*TM->getTargetData()));
+
+ // Turn the machine code intermediate representation into bytes in memory
+ // that may be executed.
+ if (TM->addPassesToEmitMC(PM, Ctx, OS, CodeGenOpt::Default, false)) {
+ report_fatal_error("Target does not support MC emission!");
+ }
+
+ // Initialize passes.
+ // FIXME: When we support multiple modules, we'll want to move the code
+ // gen and finalization out of the constructor here and do it more
+ // on-demand as part of getPointerToFunction().
+ PM.run(*M);
+ // Flush the output buffer so the SmallVector gets its data.
+ OS.flush();
+
+ // Load the object into the dynamic linker.
+ // FIXME: It would be nice to avoid making yet another copy.
+ MemoryBuffer *MB = MemoryBuffer::getMemBufferCopy(StringRef(Buffer.data(),
+ Buffer.size()));
+ if (Dyld.loadObject(MB))
+ report_fatal_error(Dyld.getErrorString());
+ // Resolve any relocations.
+ Dyld.resolveRelocations();
}
MCJIT::~MCJIT() {
+ delete MemMgr;
}
void *MCJIT::getPointerToBasicBlock(BasicBlock *BB) {
}
void *MCJIT::getPointerToFunction(Function *F) {
- report_fatal_error("not yet implemented");
- return 0;
+ if (F->isDeclaration() || F->hasAvailableExternallyLinkage()) {
+ bool AbortOnFailure = !F->hasExternalWeakLinkage();
+ void *Addr = getPointerToNamedFunction(F->getName(), AbortOnFailure);
+ addGlobalMapping(F, Addr);
+ return Addr;
+ }
+
+ // FIXME: Should we be using the mangler for this? Probably.
+ StringRef BaseName = F->getName();
+ if (BaseName[0] == '\1')
+ return (void*)Dyld.getSymbolAddress(BaseName.substr(1));
+ return (void*)Dyld.getSymbolAddress((TM->getMCAsmInfo()->getGlobalPrefix()
+ + BaseName).str());
}
void *MCJIT::recompileAndRelinkFunction(Function *F) {
GenericValue MCJIT::runFunction(Function *F,
const std::vector<GenericValue> &ArgValues) {
- report_fatal_error("not yet implemented");
+ assert(F && "Function *F was null at entry to run()");
+
+ void *FPtr = getPointerToFunction(F);
+ assert(FPtr && "Pointer to fn's code was null after getPointerToFunction");
+ const FunctionType *FTy = F->getFunctionType();
+ const Type *RetTy = FTy->getReturnType();
+
+ assert((FTy->getNumParams() == ArgValues.size() ||
+ (FTy->isVarArg() && FTy->getNumParams() <= ArgValues.size())) &&
+ "Wrong number of arguments passed into function!");
+ assert(FTy->getNumParams() == ArgValues.size() &&
+ "This doesn't support passing arguments through varargs (yet)!");
+
+ // Handle some common cases first. These cases correspond to common `main'
+ // prototypes.
+ if (RetTy->isIntegerTy(32) || RetTy->isVoidTy()) {
+ switch (ArgValues.size()) {
+ case 3:
+ if (FTy->getParamType(0)->isIntegerTy(32) &&
+ FTy->getParamType(1)->isPointerTy() &&
+ FTy->getParamType(2)->isPointerTy()) {
+ int (*PF)(int, char **, const char **) =
+ (int(*)(int, char **, const char **))(intptr_t)FPtr;
+
+ // Call the function.
+ GenericValue rv;
+ rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue(),
+ (char **)GVTOP(ArgValues[1]),
+ (const char **)GVTOP(ArgValues[2])));
+ return rv;
+ }
+ break;
+ case 2:
+ if (FTy->getParamType(0)->isIntegerTy(32) &&
+ FTy->getParamType(1)->isPointerTy()) {
+ int (*PF)(int, char **) = (int(*)(int, char **))(intptr_t)FPtr;
+
+ // Call the function.
+ GenericValue rv;
+ rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue(),
+ (char **)GVTOP(ArgValues[1])));
+ return rv;
+ }
+ break;
+ case 1:
+ if (FTy->getNumParams() == 1 &&
+ FTy->getParamType(0)->isIntegerTy(32)) {
+ GenericValue rv;
+ int (*PF)(int) = (int(*)(int))(intptr_t)FPtr;
+ rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue()));
+ return rv;
+ }
+ break;
+ }
+ }
+
+ // Handle cases where no arguments are passed first.
+ if (ArgValues.empty()) {
+ GenericValue rv;
+ switch (RetTy->getTypeID()) {
+ default: llvm_unreachable("Unknown return type for function call!");
+ case Type::IntegerTyID: {
+ unsigned BitWidth = cast<IntegerType>(RetTy)->getBitWidth();
+ if (BitWidth == 1)
+ rv.IntVal = APInt(BitWidth, ((bool(*)())(intptr_t)FPtr)());
+ else if (BitWidth <= 8)
+ rv.IntVal = APInt(BitWidth, ((char(*)())(intptr_t)FPtr)());
+ else if (BitWidth <= 16)
+ rv.IntVal = APInt(BitWidth, ((short(*)())(intptr_t)FPtr)());
+ else if (BitWidth <= 32)
+ rv.IntVal = APInt(BitWidth, ((int(*)())(intptr_t)FPtr)());
+ else if (BitWidth <= 64)
+ rv.IntVal = APInt(BitWidth, ((int64_t(*)())(intptr_t)FPtr)());
+ else
+ llvm_unreachable("Integer types > 64 bits not supported");
+ return rv;
+ }
+ case Type::VoidTyID:
+ rv.IntVal = APInt(32, ((int(*)())(intptr_t)FPtr)());
+ return rv;
+ case Type::FloatTyID:
+ rv.FloatVal = ((float(*)())(intptr_t)FPtr)();
+ return rv;
+ case Type::DoubleTyID:
+ rv.DoubleVal = ((double(*)())(intptr_t)FPtr)();
+ return rv;
+ case Type::X86_FP80TyID:
+ case Type::FP128TyID:
+ case Type::PPC_FP128TyID:
+ llvm_unreachable("long double not supported yet");
+ return rv;
+ case Type::PointerTyID:
+ return PTOGV(((void*(*)())(intptr_t)FPtr)());
+ }
+ }
+
+ assert("Full-featured argument passing not supported yet!");
return GenericValue();
}
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