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-rw-r--r--contrib/llvm/lib/Target/PTX/PTXAsmPrinter.cpp597
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diff --git a/contrib/llvm/lib/Target/PTX/PTXAsmPrinter.cpp b/contrib/llvm/lib/Target/PTX/PTXAsmPrinter.cpp
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+//===-- PTXAsmPrinter.cpp - PTX LLVM assembly writer ----------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains a printer that converts from our internal representation
+// of machine-dependent LLVM code to PTX assembly language.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "ptx-asm-printer"
+
+#include "PTX.h"
+#include "PTXAsmPrinter.h"
+#include "PTXMachineFunctionInfo.h"
+#include "PTXParamManager.h"
+#include "PTXRegisterInfo.h"
+#include "PTXTargetMachine.h"
+#include "llvm/Argument.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Function.h"
+#include "llvm/Module.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/Analysis/DebugInfo.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Target/Mangler.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace llvm;
+
+static const char PARAM_PREFIX[] = "__param_";
+static const char RETURN_PREFIX[] = "__ret_";
+
+static const char *getRegisterTypeName(unsigned RegNo,
+ const MachineRegisterInfo& MRI) {
+ const TargetRegisterClass *TRC = MRI.getRegClass(RegNo);
+
+#define TEST_REGCLS(cls, clsstr) \
+ if (PTX::cls ## RegisterClass == TRC) return # clsstr;
+
+ TEST_REGCLS(RegPred, pred);
+ TEST_REGCLS(RegI16, b16);
+ TEST_REGCLS(RegI32, b32);
+ TEST_REGCLS(RegI64, b64);
+ TEST_REGCLS(RegF32, b32);
+ TEST_REGCLS(RegF64, b64);
+#undef TEST_REGCLS
+
+ llvm_unreachable("Not in any register class!");
+ return NULL;
+}
+
+static const char *getStateSpaceName(unsigned addressSpace) {
+ switch (addressSpace) {
+ default: llvm_unreachable("Unknown state space");
+ case PTXStateSpace::Global: return "global";
+ case PTXStateSpace::Constant: return "const";
+ case PTXStateSpace::Local: return "local";
+ case PTXStateSpace::Parameter: return "param";
+ case PTXStateSpace::Shared: return "shared";
+ }
+ return NULL;
+}
+
+static const char *getTypeName(Type* type) {
+ while (true) {
+ switch (type->getTypeID()) {
+ default: llvm_unreachable("Unknown type");
+ case Type::FloatTyID: return ".f32";
+ case Type::DoubleTyID: return ".f64";
+ case Type::IntegerTyID:
+ switch (type->getPrimitiveSizeInBits()) {
+ default: llvm_unreachable("Unknown integer bit-width");
+ case 16: return ".u16";
+ case 32: return ".u32";
+ case 64: return ".u64";
+ }
+ case Type::ArrayTyID:
+ case Type::PointerTyID:
+ type = dyn_cast<SequentialType>(type)->getElementType();
+ break;
+ }
+ }
+ return NULL;
+}
+
+bool PTXAsmPrinter::doFinalization(Module &M) {
+ // XXX Temproarily remove global variables so that doFinalization() will not
+ // emit them again (global variables are emitted at beginning).
+
+ Module::GlobalListType &global_list = M.getGlobalList();
+ int i, n = global_list.size();
+ GlobalVariable **gv_array = new GlobalVariable* [n];
+
+ // first, back-up GlobalVariable in gv_array
+ i = 0;
+ for (Module::global_iterator I = global_list.begin(), E = global_list.end();
+ I != E; ++I)
+ gv_array[i++] = &*I;
+
+ // second, empty global_list
+ while (!global_list.empty())
+ global_list.remove(global_list.begin());
+
+ // call doFinalization
+ bool ret = AsmPrinter::doFinalization(M);
+
+ // now we restore global variables
+ for (i = 0; i < n; i ++)
+ global_list.insert(global_list.end(), gv_array[i]);
+
+ delete[] gv_array;
+ return ret;
+}
+
+void PTXAsmPrinter::EmitStartOfAsmFile(Module &M)
+{
+ const PTXSubtarget& ST = TM.getSubtarget<PTXSubtarget>();
+
+ // Emit the PTX .version and .target attributes
+ OutStreamer.EmitRawText(Twine("\t.version " + ST.getPTXVersionString()));
+ OutStreamer.EmitRawText(Twine("\t.target " + ST.getTargetString() +
+ (ST.supportsDouble() ? ""
+ : ", map_f64_to_f32")));
+ // .address_size directive is optional, but it must immediately follow
+ // the .target directive if present within a module
+ if (ST.supportsPTX23()) {
+ std::string addrSize = ST.is64Bit() ? "64" : "32";
+ OutStreamer.EmitRawText(Twine("\t.address_size " + addrSize));
+ }
+
+ OutStreamer.AddBlankLine();
+
+ // Define any .file directives
+ DebugInfoFinder DbgFinder;
+ DbgFinder.processModule(M);
+
+ for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
+ E = DbgFinder.compile_unit_end(); I != E; ++I) {
+ DICompileUnit DIUnit(*I);
+ StringRef FN = DIUnit.getFilename();
+ StringRef Dir = DIUnit.getDirectory();
+ GetOrCreateSourceID(FN, Dir);
+ }
+
+ OutStreamer.AddBlankLine();
+
+ // declare global variables
+ for (Module::const_global_iterator i = M.global_begin(), e = M.global_end();
+ i != e; ++i)
+ EmitVariableDeclaration(i);
+}
+
+void PTXAsmPrinter::EmitFunctionBodyStart() {
+ OutStreamer.EmitRawText(Twine("{"));
+
+ const PTXMachineFunctionInfo *MFI = MF->getInfo<PTXMachineFunctionInfo>();
+ const PTXParamManager &PM = MFI->getParamManager();
+
+ // Print register definitions
+ std::string regDefs;
+ unsigned numRegs;
+
+ // pred
+ numRegs = MFI->getNumRegistersForClass(PTX::RegPredRegisterClass);
+ if(numRegs > 0) {
+ regDefs += "\t.reg .pred %p<";
+ regDefs += utostr(numRegs);
+ regDefs += ">;\n";
+ }
+
+ // i16
+ numRegs = MFI->getNumRegistersForClass(PTX::RegI16RegisterClass);
+ if(numRegs > 0) {
+ regDefs += "\t.reg .b16 %rh<";
+ regDefs += utostr(numRegs);
+ regDefs += ">;\n";
+ }
+
+ // i32
+ numRegs = MFI->getNumRegistersForClass(PTX::RegI32RegisterClass);
+ if(numRegs > 0) {
+ regDefs += "\t.reg .b32 %r<";
+ regDefs += utostr(numRegs);
+ regDefs += ">;\n";
+ }
+
+ // i64
+ numRegs = MFI->getNumRegistersForClass(PTX::RegI64RegisterClass);
+ if(numRegs > 0) {
+ regDefs += "\t.reg .b64 %rd<";
+ regDefs += utostr(numRegs);
+ regDefs += ">;\n";
+ }
+
+ // f32
+ numRegs = MFI->getNumRegistersForClass(PTX::RegF32RegisterClass);
+ if(numRegs > 0) {
+ regDefs += "\t.reg .f32 %f<";
+ regDefs += utostr(numRegs);
+ regDefs += ">;\n";
+ }
+
+ // f64
+ numRegs = MFI->getNumRegistersForClass(PTX::RegF64RegisterClass);
+ if(numRegs > 0) {
+ regDefs += "\t.reg .f64 %fd<";
+ regDefs += utostr(numRegs);
+ regDefs += ">;\n";
+ }
+
+ // Local params
+ for (PTXParamManager::param_iterator i = PM.local_begin(), e = PM.local_end();
+ i != e; ++i) {
+ regDefs += "\t.param .b";
+ regDefs += utostr(PM.getParamSize(*i));
+ regDefs += " ";
+ regDefs += PM.getParamName(*i);
+ regDefs += ";\n";
+ }
+
+ OutStreamer.EmitRawText(Twine(regDefs));
+
+
+ const MachineFrameInfo* FrameInfo = MF->getFrameInfo();
+ DEBUG(dbgs() << "Have " << FrameInfo->getNumObjects()
+ << " frame object(s)\n");
+ for (unsigned i = 0, e = FrameInfo->getNumObjects(); i != e; ++i) {
+ DEBUG(dbgs() << "Size of object: " << FrameInfo->getObjectSize(i) << "\n");
+ if (FrameInfo->getObjectSize(i) > 0) {
+ std::string def = "\t.local .align ";
+ def += utostr(FrameInfo->getObjectAlignment(i));
+ def += " .b8";
+ def += " __local";
+ def += utostr(i);
+ def += "[";
+ def += utostr(FrameInfo->getObjectSize(i)); // Convert to bits
+ def += "]";
+ def += ";";
+ OutStreamer.EmitRawText(Twine(def));
+ }
+ }
+
+ //unsigned Index = 1;
+ // Print parameter passing params
+ //for (PTXMachineFunctionInfo::param_iterator
+ // i = MFI->paramBegin(), e = MFI->paramEnd(); i != e; ++i) {
+ // std::string def = "\t.param .b";
+ // def += utostr(*i);
+ // def += " __ret_";
+ // def += utostr(Index);
+ // Index++;
+ // def += ";";
+ // OutStreamer.EmitRawText(Twine(def));
+ //}
+}
+
+void PTXAsmPrinter::EmitFunctionBodyEnd() {
+ OutStreamer.EmitRawText(Twine("}"));
+}
+
+void PTXAsmPrinter::EmitInstruction(const MachineInstr *MI) {
+ MCInst TmpInst;
+ LowerPTXMachineInstrToMCInst(MI, TmpInst, *this);
+ OutStreamer.EmitInstruction(TmpInst);
+}
+
+void PTXAsmPrinter::EmitVariableDeclaration(const GlobalVariable *gv) {
+ // Check to see if this is a special global used by LLVM, if so, emit it.
+ if (EmitSpecialLLVMGlobal(gv))
+ return;
+
+ MCSymbol *gvsym = Mang->getSymbol(gv);
+
+ assert(gvsym->isUndefined() && "Cannot define a symbol twice!");
+
+ std::string decl;
+
+ // check if it is defined in some other translation unit
+ if (gv->isDeclaration())
+ decl += ".extern ";
+
+ // state space: e.g., .global
+ decl += ".";
+ decl += getStateSpaceName(gv->getType()->getAddressSpace());
+ decl += " ";
+
+ // alignment (optional)
+ unsigned alignment = gv->getAlignment();
+ if (alignment != 0) {
+ decl += ".align ";
+ decl += utostr(gv->getAlignment());
+ decl += " ";
+ }
+
+
+ if (PointerType::classof(gv->getType())) {
+ PointerType* pointerTy = dyn_cast<PointerType>(gv->getType());
+ Type* elementTy = pointerTy->getElementType();
+
+ decl += ".b8 ";
+ decl += gvsym->getName();
+ decl += "[";
+
+ if (elementTy->isArrayTy())
+ {
+ assert(elementTy->isArrayTy() && "Only pointers to arrays are supported");
+
+ ArrayType* arrayTy = dyn_cast<ArrayType>(elementTy);
+ elementTy = arrayTy->getElementType();
+
+ unsigned numElements = arrayTy->getNumElements();
+
+ while (elementTy->isArrayTy()) {
+
+ arrayTy = dyn_cast<ArrayType>(elementTy);
+ elementTy = arrayTy->getElementType();
+
+ numElements *= arrayTy->getNumElements();
+ }
+
+ // FIXME: isPrimitiveType() == false for i16?
+ assert(elementTy->isSingleValueType() &&
+ "Non-primitive types are not handled");
+
+ // Compute the size of the array, in bytes.
+ uint64_t arraySize = (elementTy->getPrimitiveSizeInBits() >> 3)
+ * numElements;
+
+ decl += utostr(arraySize);
+ }
+
+ decl += "]";
+
+ // handle string constants (assume ConstantArray means string)
+
+ if (gv->hasInitializer())
+ {
+ const Constant *C = gv->getInitializer();
+ if (const ConstantArray *CA = dyn_cast<ConstantArray>(C))
+ {
+ decl += " = {";
+
+ for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i)
+ {
+ if (i > 0) decl += ",";
+
+ decl += "0x" +
+ utohexstr(cast<ConstantInt>(CA->getOperand(i))->getZExtValue());
+ }
+
+ decl += "}";
+ }
+ }
+ }
+ else {
+ // Note: this is currently the fall-through case and most likely generates
+ // incorrect code.
+ decl += getTypeName(gv->getType());
+ decl += " ";
+
+ decl += gvsym->getName();
+
+ if (ArrayType::classof(gv->getType()) ||
+ PointerType::classof(gv->getType()))
+ decl += "[]";
+ }
+
+ decl += ";";
+
+ OutStreamer.EmitRawText(Twine(decl));
+
+ OutStreamer.AddBlankLine();
+}
+
+void PTXAsmPrinter::EmitFunctionEntryLabel() {
+ // The function label could have already been emitted if two symbols end up
+ // conflicting due to asm renaming. Detect this and emit an error.
+ if (!CurrentFnSym->isUndefined()) {
+ report_fatal_error("'" + Twine(CurrentFnSym->getName()) +
+ "' label emitted multiple times to assembly file");
+ return;
+ }
+
+ const PTXMachineFunctionInfo *MFI = MF->getInfo<PTXMachineFunctionInfo>();
+ const PTXParamManager &PM = MFI->getParamManager();
+ const bool isKernel = MFI->isKernel();
+ const PTXSubtarget& ST = TM.getSubtarget<PTXSubtarget>();
+ const MachineRegisterInfo& MRI = MF->getRegInfo();
+
+ std::string decl = isKernel ? ".entry" : ".func";
+
+ if (!isKernel) {
+ decl += " (";
+ if (ST.useParamSpaceForDeviceArgs()) {
+ for (PTXParamManager::param_iterator i = PM.ret_begin(), e = PM.ret_end(),
+ b = i; i != e; ++i) {
+ if (i != b) {
+ decl += ", ";
+ }
+
+ decl += ".param .b";
+ decl += utostr(PM.getParamSize(*i));
+ decl += " ";
+ decl += PM.getParamName(*i);
+ }
+ } else {
+ for (PTXMachineFunctionInfo::reg_iterator
+ i = MFI->retreg_begin(), e = MFI->retreg_end(), b = i;
+ i != e; ++i) {
+ if (i != b) {
+ decl += ", ";
+ }
+ decl += ".reg .";
+ decl += getRegisterTypeName(*i, MRI);
+ decl += " ";
+ decl += MFI->getRegisterName(*i);
+ }
+ }
+ decl += ")";
+ }
+
+ // Print function name
+ decl += " ";
+ decl += CurrentFnSym->getName().str();
+
+ decl += " (";
+
+ const Function *F = MF->getFunction();
+
+ // Print parameters
+ if (isKernel || ST.useParamSpaceForDeviceArgs()) {
+ /*for (PTXParamManager::param_iterator i = PM.arg_begin(), e = PM.arg_end(),
+ b = i; i != e; ++i) {
+ if (i != b) {
+ decl += ", ";
+ }
+
+ decl += ".param .b";
+ decl += utostr(PM.getParamSize(*i));
+ decl += " ";
+ decl += PM.getParamName(*i);
+ }*/
+ int Counter = 1;
+ for (Function::const_arg_iterator i = F->arg_begin(), e = F->arg_end(),
+ b = i; i != e; ++i) {
+ if (i != b)
+ decl += ", ";
+ const Type *ArgType = (*i).getType();
+ decl += ".param .b";
+ if (ArgType->isPointerTy()) {
+ if (ST.is64Bit())
+ decl += "64";
+ else
+ decl += "32";
+ } else {
+ decl += utostr(ArgType->getPrimitiveSizeInBits());
+ }
+ if (ArgType->isPointerTy() && ST.emitPtrAttribute()) {
+ const PointerType *PtrType = dyn_cast<const PointerType>(ArgType);
+ decl += " .ptr";
+ switch (PtrType->getAddressSpace()) {
+ default:
+ llvm_unreachable("Unknown address space in argument");
+ case PTXStateSpace::Global:
+ decl += " .global";
+ break;
+ case PTXStateSpace::Shared:
+ decl += " .shared";
+ break;
+ }
+ }
+ decl += " __param_";
+ decl += utostr(Counter++);
+ }
+ } else {
+ for (PTXMachineFunctionInfo::reg_iterator
+ i = MFI->argreg_begin(), e = MFI->argreg_end(), b = i;
+ i != e; ++i) {
+ if (i != b) {
+ decl += ", ";
+ }
+
+ decl += ".reg .";
+ decl += getRegisterTypeName(*i, MRI);
+ decl += " ";
+ decl += MFI->getRegisterName(*i);
+ }
+ }
+ decl += ")";
+
+ OutStreamer.EmitRawText(Twine(decl));
+}
+
+unsigned PTXAsmPrinter::GetOrCreateSourceID(StringRef FileName,
+ StringRef DirName) {
+ // If FE did not provide a file name, then assume stdin.
+ if (FileName.empty())
+ return GetOrCreateSourceID("<stdin>", StringRef());
+
+ // MCStream expects full path name as filename.
+ if (!DirName.empty() && !sys::path::is_absolute(FileName)) {
+ SmallString<128> FullPathName = DirName;
+ sys::path::append(FullPathName, FileName);
+ // Here FullPathName will be copied into StringMap by GetOrCreateSourceID.
+ return GetOrCreateSourceID(StringRef(FullPathName), StringRef());
+ }
+
+ StringMapEntry<unsigned> &Entry = SourceIdMap.GetOrCreateValue(FileName);
+ if (Entry.getValue())
+ return Entry.getValue();
+
+ unsigned SrcId = SourceIdMap.size();
+ Entry.setValue(SrcId);
+
+ // Print out a .file directive to specify files for .loc directives.
+ OutStreamer.EmitDwarfFileDirective(SrcId, Entry.getKey());
+
+ return SrcId;
+}
+
+MCOperand PTXAsmPrinter::GetSymbolRef(const MachineOperand &MO,
+ const MCSymbol *Symbol) {
+ const MCExpr *Expr;
+ Expr = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_None, OutContext);
+ return MCOperand::CreateExpr(Expr);
+}
+
+MCOperand PTXAsmPrinter::lowerOperand(const MachineOperand &MO) {
+ MCOperand MCOp;
+ const PTXMachineFunctionInfo *MFI = MF->getInfo<PTXMachineFunctionInfo>();
+ const MCExpr *Expr;
+ const char *RegSymbolName;
+ switch (MO.getType()) {
+ default:
+ llvm_unreachable("Unknown operand type");
+ case MachineOperand::MO_Register:
+ // We create register operands as symbols, since the PTXInstPrinter class
+ // has no way to map virtual registers back to a name without some ugly
+ // hacks.
+ // FIXME: Figure out a better way to handle virtual register naming.
+ RegSymbolName = MFI->getRegisterName(MO.getReg());
+ Expr = MCSymbolRefExpr::Create(RegSymbolName, MCSymbolRefExpr::VK_None,
+ OutContext);
+ MCOp = MCOperand::CreateExpr(Expr);
+ break;
+ case MachineOperand::MO_Immediate:
+ MCOp = MCOperand::CreateImm(MO.getImm());
+ break;
+ case MachineOperand::MO_MachineBasicBlock:
+ MCOp = MCOperand::CreateExpr(MCSymbolRefExpr::Create(
+ MO.getMBB()->getSymbol(), OutContext));
+ break;
+ case MachineOperand::MO_GlobalAddress:
+ MCOp = GetSymbolRef(MO, Mang->getSymbol(MO.getGlobal()));
+ break;
+ case MachineOperand::MO_ExternalSymbol:
+ MCOp = GetSymbolRef(MO, GetExternalSymbolSymbol(MO.getSymbolName()));
+ break;
+ case MachineOperand::MO_FPImmediate:
+ APFloat Val = MO.getFPImm()->getValueAPF();
+ bool ignored;
+ Val.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &ignored);
+ MCOp = MCOperand::CreateFPImm(Val.convertToDouble());
+ break;
+ }
+
+ return MCOp;
+}
+
+// Force static initialization.
+extern "C" void LLVMInitializePTXAsmPrinter() {
+ RegisterAsmPrinter<PTXAsmPrinter> X(ThePTX32Target);
+ RegisterAsmPrinter<PTXAsmPrinter> Y(ThePTX64Target);
+}
+
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