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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
138 lines
4.6 KiB
C++
138 lines
4.6 KiB
C++
//===-------- OrcMCJITReplacement.cpp - Orc-based MCJIT replacement -------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "OrcMCJITReplacement.h"
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#include "llvm/ExecutionEngine/GenericValue.h"
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namespace {
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static struct RegisterJIT {
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RegisterJIT() { llvm::orc::OrcMCJITReplacement::Register(); }
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} JITRegistrator;
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}
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extern "C" void LLVMLinkInOrcMCJITReplacement() {}
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namespace llvm {
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namespace orc {
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GenericValue
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OrcMCJITReplacement::runFunction(Function *F,
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ArrayRef<GenericValue> ArgValues) {
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assert(F && "Function *F was null at entry to run()");
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void *FPtr = getPointerToFunction(F);
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assert(FPtr && "Pointer to fn's code was null after getPointerToFunction");
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FunctionType *FTy = F->getFunctionType();
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Type *RetTy = FTy->getReturnType();
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assert((FTy->getNumParams() == ArgValues.size() ||
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(FTy->isVarArg() && FTy->getNumParams() <= ArgValues.size())) &&
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"Wrong number of arguments passed into function!");
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assert(FTy->getNumParams() == ArgValues.size() &&
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"This doesn't support passing arguments through varargs (yet)!");
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// Handle some common cases first. These cases correspond to common `main'
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// prototypes.
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if (RetTy->isIntegerTy(32) || RetTy->isVoidTy()) {
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switch (ArgValues.size()) {
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case 3:
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if (FTy->getParamType(0)->isIntegerTy(32) &&
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FTy->getParamType(1)->isPointerTy() &&
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FTy->getParamType(2)->isPointerTy()) {
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int (*PF)(int, char **, const char **) =
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(int (*)(int, char **, const char **))(intptr_t)FPtr;
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// Call the function.
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GenericValue rv;
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rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue(),
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(char **)GVTOP(ArgValues[1]),
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(const char **)GVTOP(ArgValues[2])));
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return rv;
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}
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break;
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case 2:
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if (FTy->getParamType(0)->isIntegerTy(32) &&
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FTy->getParamType(1)->isPointerTy()) {
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int (*PF)(int, char **) = (int (*)(int, char **))(intptr_t)FPtr;
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// Call the function.
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GenericValue rv;
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rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue(),
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(char **)GVTOP(ArgValues[1])));
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return rv;
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}
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break;
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case 1:
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if (FTy->getNumParams() == 1 && FTy->getParamType(0)->isIntegerTy(32)) {
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GenericValue rv;
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int (*PF)(int) = (int (*)(int))(intptr_t)FPtr;
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rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue()));
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return rv;
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}
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break;
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}
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}
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// Handle cases where no arguments are passed first.
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if (ArgValues.empty()) {
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GenericValue rv;
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switch (RetTy->getTypeID()) {
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default:
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llvm_unreachable("Unknown return type for function call!");
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case Type::IntegerTyID: {
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unsigned BitWidth = cast<IntegerType>(RetTy)->getBitWidth();
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if (BitWidth == 1)
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rv.IntVal = APInt(BitWidth, ((bool (*)())(intptr_t)FPtr)());
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else if (BitWidth <= 8)
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rv.IntVal = APInt(BitWidth, ((char (*)())(intptr_t)FPtr)());
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else if (BitWidth <= 16)
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rv.IntVal = APInt(BitWidth, ((short (*)())(intptr_t)FPtr)());
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else if (BitWidth <= 32)
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rv.IntVal = APInt(BitWidth, ((int (*)())(intptr_t)FPtr)());
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else if (BitWidth <= 64)
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rv.IntVal = APInt(BitWidth, ((int64_t (*)())(intptr_t)FPtr)());
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else
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llvm_unreachable("Integer types > 64 bits not supported");
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return rv;
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}
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case Type::VoidTyID:
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rv.IntVal = APInt(32, ((int (*)())(intptr_t)FPtr)());
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return rv;
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case Type::FloatTyID:
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rv.FloatVal = ((float (*)())(intptr_t)FPtr)();
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return rv;
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case Type::DoubleTyID:
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rv.DoubleVal = ((double (*)())(intptr_t)FPtr)();
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return rv;
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case Type::X86_FP80TyID:
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case Type::FP128TyID:
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case Type::PPC_FP128TyID:
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llvm_unreachable("long double not supported yet");
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case Type::PointerTyID:
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return PTOGV(((void *(*)())(intptr_t)FPtr)());
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}
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}
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llvm_unreachable("Full-featured argument passing not supported yet!");
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}
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void OrcMCJITReplacement::runStaticConstructorsDestructors(bool isDtors) {
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auto &CtorDtorsMap = isDtors ? UnexecutedDestructors : UnexecutedConstructors;
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for (auto &KV : CtorDtorsMap)
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cantFail(LegacyCtorDtorRunner<LazyEmitLayerT>(std::move(KV.second), KV.first)
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.runViaLayer(LazyEmitLayer));
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CtorDtorsMap.clear();
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}
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} // End namespace orc.
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} // End namespace llvm.
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