Initial skeleton of Subzero.
This includes just enough code to build the high-level ICE IR and dump it back out again. There is a script szdiff.py that does a fuzzy diff of the input and output for verification. See the comment in szdiff.py for a description of the fuzziness.
Building llvm2ice requires LLVM headers, libs, and tools (e.g. FileCheck) to be present. These default to something like llvm_i686_linux_work/Release+Asserts/ based on the checked-out and built pnacl-llvm code; I'll try to figure out how to more automatically detect the build configuration.
"make check" runs the lit tests.
This CL has under 2000 lines of "interesting" Ice*.{h,cpp} code, plus 600 lines of llvm2ice.cpp driver code, and the rest is tests.
Here is the high-level mapping of source files to functionality:
IceDefs.h, IceTypes.h, IceTypes.cpp:
Commonly used types and utilities.
IceCfg.h, IceCfg.cpp:
Operations at the function level.
IceCfgNode.h, IceCfgNode.cpp:
Operations on basic blocks (nodes).
IceInst.h, IceInst.cpp:
Operations on instructions.
IceOperand.h, IceOperand.cpp:
Operations on operands, such as stack locations, physical registers, and constants.
BUG= none
R=jfb@chromium.org
Review URL: https://codereview.chromium.org/205613002
diff --git a/src/llvm2ice.cpp b/src/llvm2ice.cpp
new file mode 100644
index 0000000..df9061b
--- /dev/null
+++ b/src/llvm2ice.cpp
@@ -0,0 +1,655 @@
+//===- subzero/src/llvm2ice.cpp - Driver for testing ----------------------===//
+//
+// The Subzero Code Generator
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines a driver that uses LLVM capabilities to parse a
+// bitcode file and build the LLVM IR, and then convert the LLVM basic
+// blocks, instructions, and operands into their Subzero equivalents.
+//
+//===----------------------------------------------------------------------===//
+
+#include "IceCfg.h"
+#include "IceCfgNode.h"
+#include "IceDefs.h"
+#include "IceGlobalContext.h"
+#include "IceInst.h"
+#include "IceOperand.h"
+#include "IceTypes.h"
+
+#include "llvm/IR/Constant.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/Instruction.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IRReader/IRReader.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_os_ostream.h"
+#include "llvm/Support/SourceMgr.h"
+
+#include <fstream>
+#include <iostream>
+
+using namespace llvm;
+
+// Debugging helper
+template <typename T> static std::string LLVMObjectAsString(const T *O) {
+ std::string Dump;
+ raw_string_ostream Stream(Dump);
+ O->print(Stream);
+ return Stream.str();
+}
+
+// Converter from LLVM to ICE. The entry point is the convertFunction method.
+//
+// Note: this currently assumes that the given IR was verified to be valid PNaCl
+// bitcode:
+// https://developers.google.com/native-client/dev/reference/pnacl-bitcode-abi
+// If not, all kinds of assertions may fire.
+//
+class LLVM2ICEConverter {
+public:
+ LLVM2ICEConverter(Ice::GlobalContext *Ctx)
+ : Ctx(Ctx), Func(NULL), CurrentNode(NULL) {
+ // All PNaCl pointer widths are 32 bits because of the sandbox
+ // model.
+ SubzeroPointerType = Ice::IceType_i32;
+ }
+
+ Ice::Cfg *convertFunction(const Function *F) {
+ VarMap.clear();
+ NodeMap.clear();
+ Func = new Ice::Cfg(Ctx);
+ Func->setFunctionName(F->getName());
+ Func->setReturnType(convertType(F->getReturnType()));
+ Func->setInternal(F->hasInternalLinkage());
+
+ // The initial definition/use of each arg is the entry node.
+ CurrentNode = mapBasicBlockToNode(&F->getEntryBlock());
+ for (Function::const_arg_iterator ArgI = F->arg_begin(),
+ ArgE = F->arg_end();
+ ArgI != ArgE; ++ArgI) {
+ Func->addArg(mapValueToIceVar(ArgI));
+ }
+
+ // Make an initial pass through the block list just to resolve the
+ // blocks in the original linearized order. Otherwise the ICE
+ // linearized order will be affected by branch targets in
+ // terminator instructions.
+ for (Function::const_iterator BBI = F->begin(), BBE = F->end(); BBI != BBE;
+ ++BBI) {
+ mapBasicBlockToNode(BBI);
+ }
+ for (Function::const_iterator BBI = F->begin(), BBE = F->end(); BBI != BBE;
+ ++BBI) {
+ CurrentNode = mapBasicBlockToNode(BBI);
+ convertBasicBlock(BBI);
+ }
+ Func->setEntryNode(mapBasicBlockToNode(&F->getEntryBlock()));
+ Func->computePredecessors();
+
+ return Func;
+ }
+
+private:
+ // LLVM values (instructions, etc.) are mapped directly to ICE variables.
+ // mapValueToIceVar has a version that forces an ICE type on the variable,
+ // and a version that just uses convertType on V.
+ Ice::Variable *mapValueToIceVar(const Value *V, Ice::Type IceTy) {
+ if (IceTy == Ice::IceType_void)
+ return NULL;
+ if (VarMap.find(V) == VarMap.end()) {
+ assert(CurrentNode);
+ VarMap[V] = Func->makeVariable(IceTy, CurrentNode, V->getName());
+ }
+ return VarMap[V];
+ }
+
+ Ice::Variable *mapValueToIceVar(const Value *V) {
+ return mapValueToIceVar(V, convertType(V->getType()));
+ }
+
+ Ice::CfgNode *mapBasicBlockToNode(const BasicBlock *BB) {
+ if (NodeMap.find(BB) == NodeMap.end()) {
+ NodeMap[BB] = Func->makeNode(BB->getName());
+ }
+ return NodeMap[BB];
+ }
+
+ Ice::Type convertIntegerType(const IntegerType *IntTy) const {
+ switch (IntTy->getBitWidth()) {
+ case 1:
+ return Ice::IceType_i1;
+ case 8:
+ return Ice::IceType_i8;
+ case 16:
+ return Ice::IceType_i16;
+ case 32:
+ return Ice::IceType_i32;
+ case 64:
+ return Ice::IceType_i64;
+ default:
+ report_fatal_error(std::string("Invalid PNaCl int type: ") +
+ LLVMObjectAsString(IntTy));
+ return Ice::IceType_void;
+ }
+ }
+
+ Ice::Type convertType(const Type *Ty) const {
+ switch (Ty->getTypeID()) {
+ case Type::VoidTyID:
+ return Ice::IceType_void;
+ case Type::IntegerTyID:
+ return convertIntegerType(cast<IntegerType>(Ty));
+ case Type::FloatTyID:
+ return Ice::IceType_f32;
+ case Type::DoubleTyID:
+ return Ice::IceType_f64;
+ case Type::PointerTyID:
+ return SubzeroPointerType;
+ case Type::FunctionTyID:
+ return SubzeroPointerType;
+ default:
+ report_fatal_error(std::string("Invalid PNaCl type: ") +
+ LLVMObjectAsString(Ty));
+ }
+
+ llvm_unreachable("convertType");
+ return Ice::IceType_void;
+ }
+
+ // Given a LLVM instruction and an operand number, produce the Operand this
+ // refers to. If there's no such operand, return NULL.
+ Ice::Operand *convertOperand(const Instruction *Inst, unsigned OpNum) {
+ if (OpNum >= Inst->getNumOperands()) {
+ return NULL;
+ }
+ const Value *Op = Inst->getOperand(OpNum);
+ return convertValue(Op);
+ }
+
+ Ice::Operand *convertValue(const Value *Op) {
+ if (const Constant *Const = dyn_cast<Constant>(Op)) {
+ if (const GlobalValue *GV = dyn_cast<GlobalValue>(Const)) {
+ return Ctx->getConstantSym(convertType(GV->getType()), 0,
+ GV->getName());
+ } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(Const)) {
+ return Ctx->getConstantInt(convertIntegerType(CI->getType()),
+ CI->getZExtValue());
+ } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(Const)) {
+ Ice::Type Type = convertType(CFP->getType());
+ if (Type == Ice::IceType_f32)
+ return Ctx->getConstantFloat(CFP->getValueAPF().convertToFloat());
+ else if (Type == Ice::IceType_f64)
+ return Ctx->getConstantDouble(CFP->getValueAPF().convertToDouble());
+ assert(0 && "Unexpected floating point type");
+ return NULL;
+ } else {
+ assert(0 && "Unhandled constant type");
+ return NULL;
+ }
+ } else {
+ return mapValueToIceVar(Op);
+ }
+ }
+
+ // Note: this currently assumes a 1x1 mapping between LLVM IR and Ice
+ // instructions.
+ Ice::Inst *convertInstruction(const Instruction *Inst) {
+ switch (Inst->getOpcode()) {
+ case Instruction::PHI:
+ return convertPHINodeInstruction(cast<PHINode>(Inst));
+ case Instruction::Br:
+ return convertBrInstruction(cast<BranchInst>(Inst));
+ case Instruction::Ret:
+ return convertRetInstruction(cast<ReturnInst>(Inst));
+ case Instruction::IntToPtr:
+ return convertIntToPtrInstruction(cast<IntToPtrInst>(Inst));
+ case Instruction::PtrToInt:
+ return convertPtrToIntInstruction(cast<PtrToIntInst>(Inst));
+ case Instruction::ICmp:
+ return convertICmpInstruction(cast<ICmpInst>(Inst));
+ case Instruction::FCmp:
+ return convertFCmpInstruction(cast<FCmpInst>(Inst));
+ case Instruction::Select:
+ return convertSelectInstruction(cast<SelectInst>(Inst));
+ case Instruction::Switch:
+ return convertSwitchInstruction(cast<SwitchInst>(Inst));
+ case Instruction::Load:
+ return convertLoadInstruction(cast<LoadInst>(Inst));
+ case Instruction::Store:
+ return convertStoreInstruction(cast<StoreInst>(Inst));
+ case Instruction::ZExt:
+ return convertCastInstruction(cast<ZExtInst>(Inst), Ice::InstCast::Zext);
+ case Instruction::SExt:
+ return convertCastInstruction(cast<SExtInst>(Inst), Ice::InstCast::Sext);
+ case Instruction::Trunc:
+ return convertCastInstruction(cast<TruncInst>(Inst),
+ Ice::InstCast::Trunc);
+ case Instruction::FPTrunc:
+ return convertCastInstruction(cast<FPTruncInst>(Inst),
+ Ice::InstCast::Fptrunc);
+ case Instruction::FPExt:
+ return convertCastInstruction(cast<FPExtInst>(Inst),
+ Ice::InstCast::Fpext);
+ case Instruction::FPToSI:
+ return convertCastInstruction(cast<FPToSIInst>(Inst),
+ Ice::InstCast::Fptosi);
+ case Instruction::FPToUI:
+ return convertCastInstruction(cast<FPToUIInst>(Inst),
+ Ice::InstCast::Fptoui);
+ case Instruction::SIToFP:
+ return convertCastInstruction(cast<SIToFPInst>(Inst),
+ Ice::InstCast::Sitofp);
+ case Instruction::UIToFP:
+ return convertCastInstruction(cast<UIToFPInst>(Inst),
+ Ice::InstCast::Uitofp);
+ case Instruction::BitCast:
+ return convertCastInstruction(cast<BitCastInst>(Inst),
+ Ice::InstCast::Bitcast);
+ case Instruction::Add:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Add);
+ case Instruction::Sub:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Sub);
+ case Instruction::Mul:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Mul);
+ case Instruction::UDiv:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Udiv);
+ case Instruction::SDiv:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Sdiv);
+ case Instruction::URem:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Urem);
+ case Instruction::SRem:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Srem);
+ case Instruction::Shl:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Shl);
+ case Instruction::LShr:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Lshr);
+ case Instruction::AShr:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Ashr);
+ case Instruction::FAdd:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Fadd);
+ case Instruction::FSub:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Fsub);
+ case Instruction::FMul:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Fmul);
+ case Instruction::FDiv:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Fdiv);
+ case Instruction::FRem:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Frem);
+ case Instruction::And:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::And);
+ case Instruction::Or:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Or);
+ case Instruction::Xor:
+ return convertArithInstruction(Inst, Ice::InstArithmetic::Xor);
+ case Instruction::Call:
+ return convertCallInstruction(cast<CallInst>(Inst));
+ case Instruction::Alloca:
+ return convertAllocaInstruction(cast<AllocaInst>(Inst));
+ case Instruction::Unreachable:
+ return convertUnreachableInstruction(cast<UnreachableInst>(Inst));
+ default:
+ report_fatal_error(std::string("Invalid PNaCl instruction: ") +
+ LLVMObjectAsString(Inst));
+ }
+
+ llvm_unreachable("convertInstruction");
+ return NULL;
+ }
+
+ Ice::Inst *convertLoadInstruction(const LoadInst *Inst) {
+ Ice::Operand *Src = convertOperand(Inst, 0);
+ Ice::Variable *Dest = mapValueToIceVar(Inst);
+ return Ice::InstLoad::create(Func, Dest, Src);
+ }
+
+ Ice::Inst *convertStoreInstruction(const StoreInst *Inst) {
+ Ice::Operand *Addr = convertOperand(Inst, 1);
+ Ice::Operand *Val = convertOperand(Inst, 0);
+ return Ice::InstStore::create(Func, Val, Addr);
+ }
+
+ Ice::Inst *convertArithInstruction(const Instruction *Inst,
+ Ice::InstArithmetic::OpKind Opcode) {
+ const BinaryOperator *BinOp = cast<BinaryOperator>(Inst);
+ Ice::Operand *Src0 = convertOperand(Inst, 0);
+ Ice::Operand *Src1 = convertOperand(Inst, 1);
+ Ice::Variable *Dest = mapValueToIceVar(BinOp);
+ return Ice::InstArithmetic::create(Func, Opcode, Dest, Src0, Src1);
+ }
+
+ Ice::Inst *convertPHINodeInstruction(const PHINode *Inst) {
+ unsigned NumValues = Inst->getNumIncomingValues();
+ Ice::InstPhi *IcePhi =
+ Ice::InstPhi::create(Func, NumValues, mapValueToIceVar(Inst));
+ for (unsigned N = 0, E = NumValues; N != E; ++N) {
+ IcePhi->addArgument(convertOperand(Inst, N),
+ mapBasicBlockToNode(Inst->getIncomingBlock(N)));
+ }
+ return IcePhi;
+ }
+
+ Ice::Inst *convertBrInstruction(const BranchInst *Inst) {
+ if (Inst->isConditional()) {
+ Ice::Operand *Src = convertOperand(Inst, 0);
+ BasicBlock *BBThen = Inst->getSuccessor(0);
+ BasicBlock *BBElse = Inst->getSuccessor(1);
+ Ice::CfgNode *NodeThen = mapBasicBlockToNode(BBThen);
+ Ice::CfgNode *NodeElse = mapBasicBlockToNode(BBElse);
+ return Ice::InstBr::create(Func, Src, NodeThen, NodeElse);
+ } else {
+ BasicBlock *BBSucc = Inst->getSuccessor(0);
+ return Ice::InstBr::create(Func, mapBasicBlockToNode(BBSucc));
+ }
+ }
+
+ Ice::Inst *convertIntToPtrInstruction(const IntToPtrInst *Inst) {
+ Ice::Operand *Src = convertOperand(Inst, 0);
+ Ice::Variable *Dest = mapValueToIceVar(Inst, SubzeroPointerType);
+ return Ice::InstAssign::create(Func, Dest, Src);
+ }
+
+ Ice::Inst *convertPtrToIntInstruction(const PtrToIntInst *Inst) {
+ Ice::Operand *Src = convertOperand(Inst, 0);
+ Ice::Variable *Dest = mapValueToIceVar(Inst);
+ return Ice::InstAssign::create(Func, Dest, Src);
+ }
+
+ Ice::Inst *convertRetInstruction(const ReturnInst *Inst) {
+ Ice::Operand *RetOperand = convertOperand(Inst, 0);
+ if (RetOperand) {
+ return Ice::InstRet::create(Func, RetOperand);
+ } else {
+ return Ice::InstRet::create(Func);
+ }
+ }
+
+ Ice::Inst *convertCastInstruction(const Instruction *Inst,
+ Ice::InstCast::OpKind CastKind) {
+ Ice::Operand *Src = convertOperand(Inst, 0);
+ Ice::Variable *Dest = mapValueToIceVar(Inst);
+ return Ice::InstCast::create(Func, CastKind, Dest, Src);
+ }
+
+ Ice::Inst *convertICmpInstruction(const ICmpInst *Inst) {
+ Ice::Operand *Src0 = convertOperand(Inst, 0);
+ Ice::Operand *Src1 = convertOperand(Inst, 1);
+ Ice::Variable *Dest = mapValueToIceVar(Inst);
+
+ Ice::InstIcmp::ICond Cond;
+ switch (Inst->getPredicate()) {
+ default:
+ llvm_unreachable("ICmpInst predicate");
+ case CmpInst::ICMP_EQ:
+ Cond = Ice::InstIcmp::Eq;
+ break;
+ case CmpInst::ICMP_NE:
+ Cond = Ice::InstIcmp::Ne;
+ break;
+ case CmpInst::ICMP_UGT:
+ Cond = Ice::InstIcmp::Ugt;
+ break;
+ case CmpInst::ICMP_UGE:
+ Cond = Ice::InstIcmp::Uge;
+ break;
+ case CmpInst::ICMP_ULT:
+ Cond = Ice::InstIcmp::Ult;
+ break;
+ case CmpInst::ICMP_ULE:
+ Cond = Ice::InstIcmp::Ule;
+ break;
+ case CmpInst::ICMP_SGT:
+ Cond = Ice::InstIcmp::Sgt;
+ break;
+ case CmpInst::ICMP_SGE:
+ Cond = Ice::InstIcmp::Sge;
+ break;
+ case CmpInst::ICMP_SLT:
+ Cond = Ice::InstIcmp::Slt;
+ break;
+ case CmpInst::ICMP_SLE:
+ Cond = Ice::InstIcmp::Sle;
+ break;
+ }
+
+ return Ice::InstIcmp::create(Func, Cond, Dest, Src0, Src1);
+ }
+
+ Ice::Inst *convertFCmpInstruction(const FCmpInst *Inst) {
+ Ice::Operand *Src0 = convertOperand(Inst, 0);
+ Ice::Operand *Src1 = convertOperand(Inst, 1);
+ Ice::Variable *Dest = mapValueToIceVar(Inst);
+
+ Ice::InstFcmp::FCond Cond;
+ switch (Inst->getPredicate()) {
+
+ default:
+ llvm_unreachable("FCmpInst predicate");
+
+ case CmpInst::FCMP_FALSE:
+ Cond = Ice::InstFcmp::False;
+ break;
+ case CmpInst::FCMP_OEQ:
+ Cond = Ice::InstFcmp::Oeq;
+ break;
+ case CmpInst::FCMP_OGT:
+ Cond = Ice::InstFcmp::Ogt;
+ break;
+ case CmpInst::FCMP_OGE:
+ Cond = Ice::InstFcmp::Oge;
+ break;
+ case CmpInst::FCMP_OLT:
+ Cond = Ice::InstFcmp::Olt;
+ break;
+ case CmpInst::FCMP_OLE:
+ Cond = Ice::InstFcmp::Ole;
+ break;
+ case CmpInst::FCMP_ONE:
+ Cond = Ice::InstFcmp::One;
+ break;
+ case CmpInst::FCMP_ORD:
+ Cond = Ice::InstFcmp::Ord;
+ break;
+ case CmpInst::FCMP_UEQ:
+ Cond = Ice::InstFcmp::Ueq;
+ break;
+ case CmpInst::FCMP_UGT:
+ Cond = Ice::InstFcmp::Ugt;
+ break;
+ case CmpInst::FCMP_UGE:
+ Cond = Ice::InstFcmp::Uge;
+ break;
+ case CmpInst::FCMP_ULT:
+ Cond = Ice::InstFcmp::Ult;
+ break;
+ case CmpInst::FCMP_ULE:
+ Cond = Ice::InstFcmp::Ule;
+ break;
+ case CmpInst::FCMP_UNE:
+ Cond = Ice::InstFcmp::Une;
+ break;
+ case CmpInst::FCMP_UNO:
+ Cond = Ice::InstFcmp::Uno;
+ break;
+ case CmpInst::FCMP_TRUE:
+ Cond = Ice::InstFcmp::True;
+ break;
+ }
+
+ return Ice::InstFcmp::create(Func, Cond, Dest, Src0, Src1);
+ }
+
+ Ice::Inst *convertSelectInstruction(const SelectInst *Inst) {
+ Ice::Variable *Dest = mapValueToIceVar(Inst);
+ Ice::Operand *Cond = convertValue(Inst->getCondition());
+ Ice::Operand *Source1 = convertValue(Inst->getTrueValue());
+ Ice::Operand *Source2 = convertValue(Inst->getFalseValue());
+ return Ice::InstSelect::create(Func, Dest, Cond, Source1, Source2);
+ }
+
+ Ice::Inst *convertSwitchInstruction(const SwitchInst *Inst) {
+ Ice::Operand *Source = convertValue(Inst->getCondition());
+ Ice::CfgNode *LabelDefault = mapBasicBlockToNode(Inst->getDefaultDest());
+ unsigned NumCases = Inst->getNumCases();
+ Ice::InstSwitch *Switch =
+ Ice::InstSwitch::create(Func, NumCases, Source, LabelDefault);
+ unsigned CurrentCase = 0;
+ for (SwitchInst::ConstCaseIt I = Inst->case_begin(), E = Inst->case_end();
+ I != E; ++I, ++CurrentCase) {
+ uint64_t CaseValue = I.getCaseValue()->getZExtValue();
+ Ice::CfgNode *CaseSuccessor = mapBasicBlockToNode(I.getCaseSuccessor());
+ Switch->addBranch(CurrentCase, CaseValue, CaseSuccessor);
+ }
+ return Switch;
+ }
+
+ Ice::Inst *convertCallInstruction(const CallInst *Inst) {
+ Ice::Variable *Dest = mapValueToIceVar(Inst);
+ Ice::Operand *CallTarget = convertValue(Inst->getCalledValue());
+ unsigned NumArgs = Inst->getNumArgOperands();
+ // Note: Subzero doesn't (yet) do anything special with the Tail
+ // flag in the bitcode, i.e. CallInst::isTailCall().
+ Ice::InstCall *NewInst =
+ Ice::InstCall::create(Func, NumArgs, Dest, CallTarget);
+ for (unsigned i = 0; i < NumArgs; ++i) {
+ NewInst->addArg(convertOperand(Inst, i));
+ }
+ return NewInst;
+ }
+
+ Ice::Inst *convertAllocaInstruction(const AllocaInst *Inst) {
+ // PNaCl bitcode only contains allocas of byte-granular objects.
+ Ice::Operand *ByteCount = convertValue(Inst->getArraySize());
+ uint32_t Align = Inst->getAlignment();
+ Ice::Variable *Dest = mapValueToIceVar(Inst, SubzeroPointerType);
+
+ return Ice::InstAlloca::create(Func, ByteCount, Align, Dest);
+ }
+
+ Ice::Inst *convertUnreachableInstruction(const UnreachableInst *Inst) {
+ return Ice::InstUnreachable::create(Func);
+ }
+
+ Ice::CfgNode *convertBasicBlock(const BasicBlock *BB) {
+ Ice::CfgNode *Node = mapBasicBlockToNode(BB);
+ for (BasicBlock::const_iterator II = BB->begin(), II_e = BB->end();
+ II != II_e; ++II) {
+ Ice::Inst *Inst = convertInstruction(II);
+ Node->appendInst(Inst);
+ }
+ return Node;
+ }
+
+private:
+ // Data
+ Ice::GlobalContext *Ctx;
+ Ice::Cfg *Func;
+ Ice::CfgNode *CurrentNode;
+ Ice::Type SubzeroPointerType;
+ std::map<const Value *, Ice::Variable *> VarMap;
+ std::map<const BasicBlock *, Ice::CfgNode *> NodeMap;
+};
+
+static cl::list<Ice::VerboseItem> VerboseList(
+ "verbose", cl::CommaSeparated,
+ cl::desc("Verbose options (can be comma-separated):"),
+ cl::values(
+ clEnumValN(Ice::IceV_Instructions, "inst", "Print basic instructions"),
+ clEnumValN(Ice::IceV_Deleted, "del", "Include deleted instructions"),
+ clEnumValN(Ice::IceV_InstNumbers, "instnum",
+ "Print instruction numbers"),
+ clEnumValN(Ice::IceV_Preds, "pred", "Show predecessors"),
+ clEnumValN(Ice::IceV_Succs, "succ", "Show successors"),
+ clEnumValN(Ice::IceV_Liveness, "live", "Liveness information"),
+ clEnumValN(Ice::IceV_RegManager, "rmgr", "Register manager status"),
+ clEnumValN(Ice::IceV_RegOrigins, "orig", "Physical register origins"),
+ clEnumValN(Ice::IceV_LinearScan, "regalloc", "Linear scan details"),
+ clEnumValN(Ice::IceV_Frame, "frame", "Stack frame layout details"),
+ clEnumValN(Ice::IceV_Timing, "time", "Pass timing details"),
+ clEnumValN(Ice::IceV_All, "all", "Use all verbose options"),
+ clEnumValN(Ice::IceV_None, "none", "No verbosity"), clEnumValEnd));
+static cl::opt<std::string> IRFilename(cl::Positional, cl::desc("<IR file>"),
+ cl::Required);
+static cl::opt<std::string> OutputFilename("o",
+ cl::desc("Override output filename"),
+ cl::init("-"),
+ cl::value_desc("filename"));
+static cl::opt<std::string>
+TestPrefix("prefix", cl::desc("Prepend a prefix to symbol names for testing"),
+ cl::init(""), cl::value_desc("prefix"));
+static cl::opt<bool>
+DisableInternal("external",
+ cl::desc("Disable 'internal' linkage type for testing"));
+static cl::opt<bool>
+DisableTranslation("notranslate", cl::desc("Disable Subzero translation"));
+
+static cl::opt<bool> SubzeroTimingEnabled(
+ "timing", cl::desc("Enable breakdown timing of Subzero translation"));
+
+int main(int argc, char **argv) {
+ cl::ParseCommandLineOptions(argc, argv);
+
+ // Parse the input LLVM IR file into a module.
+ SMDiagnostic Err;
+ Module *Mod;
+
+ {
+ Ice::Timer T;
+ Mod = ParseIRFile(IRFilename, Err, getGlobalContext());
+
+ if (SubzeroTimingEnabled) {
+ std::cerr << "[Subzero timing] IR Parsing: " << T.getElapsedSec()
+ << " sec\n";
+ }
+ }
+
+ if (!Mod) {
+ Err.print(argv[0], errs());
+ return 1;
+ }
+
+ Ice::VerboseMask VMask = Ice::IceV_None;
+ for (unsigned i = 0; i != VerboseList.size(); ++i)
+ VMask |= VerboseList[i];
+
+ std::ofstream Ofs;
+ if (OutputFilename != "-") {
+ Ofs.open(OutputFilename.c_str(), std::ofstream::out);
+ }
+ raw_os_ostream *Os =
+ new raw_os_ostream(OutputFilename == "-" ? std::cout : Ofs);
+ Os->SetUnbuffered();
+
+ Ice::GlobalContext Ctx(Os, Os, VMask, TestPrefix);
+
+ for (Module::const_iterator I = Mod->begin(), E = Mod->end(); I != E; ++I) {
+ if (I->empty())
+ continue;
+ LLVM2ICEConverter FunctionConverter(&Ctx);
+
+ Ice::Timer TConvert;
+ Ice::Cfg *Func = FunctionConverter.convertFunction(I);
+ if (DisableInternal)
+ Func->setInternal(false);
+
+ if (SubzeroTimingEnabled) {
+ std::cerr << "[Subzero timing] Convert function "
+ << Func->getFunctionName() << ": " << TConvert.getElapsedSec()
+ << " sec\n";
+ }
+
+ if (DisableTranslation) {
+ Func->dump();
+ }
+ }
+
+ return 0;
+}
