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f256d8e905
This commit adds a 'Legacy' prefix to old ORC layers and utilities, and removes the '2' suffix from the new ORC layers. If you wish to continue using the old ORC layers you will need to add a 'Legacy' prefix to your classes. If you were already using the new ORC layers you will need to drop the '2' suffix. The legacy layers will remain in-tree until the new layers reach feature parity with them. This will involve adding support for removing code from the new layers, and ensuring that performance is comperable. llvm-svn: 344572
139 lines
4.6 KiB
C++
139 lines
4.6 KiB
C++
//===-------- OrcMCJITReplacement.cpp - Orc-based MCJIT replacement -------===//
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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 "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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