#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/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/Mangler.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
-#include "llvm/Target/TargetRegistry.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 cl::opt<std::string>
-OptPTXVersion("ptx-version", cl::desc("Set PTX version"), cl::init("1.4"));
-
-static cl::opt<std::string>
-OptPTXTarget("ptx-target", cl::desc("Set GPU target (comma-separated list)"),
- cl::init("sm_10"));
-
namespace {
class PTXAsmPrinter : public AsmPrinter {
public:
const char *Modifier = 0);
void printParamOperand(const MachineInstr *MI, int opNum, raw_ostream &OS,
const char *Modifier = 0);
+ void printReturnOperand(const MachineInstr *MI, int opNum, raw_ostream &OS,
+ const char *Modifier = 0);
+ void printPredicateOperand(const MachineInstr *MI, raw_ostream &O);
+
+ void printCall(const MachineInstr *MI, raw_ostream &O);
+
+ unsigned GetOrCreateSourceID(StringRef FileName,
+ StringRef DirName);
// autogen'd.
void printInstruction(const MachineInstr *MI, raw_ostream &OS);
private:
void EmitVariableDeclaration(const GlobalVariable *gv);
void EmitFunctionDeclaration();
+
+ StringMap<unsigned> SourceIdMap;
}; // class PTXAsmPrinter
} // namespace
static const char PARAM_PREFIX[] = "__param_";
+static const char RETURN_PREFIX[] = "__ret_";
static const char *getRegisterTypeName(unsigned RegNo) {
-#define TEST_REGCLS(cls, clsstr) \
+#define TEST_REGCLS(cls, clsstr) \
if (PTX::cls ## RegisterClass->contains(RegNo)) return # clsstr;
- TEST_REGCLS(RRegs32, s32);
- TEST_REGCLS(Preds, pred);
+ 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 *getInstructionTypeName(const MachineInstr *MI) {
- for (int i = 0, e = MI->getNumOperands(); i != e; ++i) {
- const MachineOperand &MO = MI->getOperand(i);
- if (MO.getType() == MachineOperand::MO_Register)
- return getRegisterTypeName(MO.getReg());
- }
-
- llvm_unreachable("No reg operand found in instruction!");
- return NULL;
-}
-
static const char *getStateSpaceName(unsigned addressSpace) {
switch (addressSpace) {
default: llvm_unreachable("Unknown state space");
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).
void PTXAsmPrinter::EmitStartOfAsmFile(Module &M)
{
- OutStreamer.EmitRawText(Twine("\t.version " + OptPTXVersion));
- OutStreamer.EmitRawText(Twine("\t.target " + OptPTXTarget));
+ const PTXSubtarget& ST = TM.getSubtarget<PTXSubtarget>();
+
+ 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
def += ';';
OutStreamer.EmitRawText(Twine(def));
}
+
+ 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.reg .b";
+ def += utostr(FrameInfo->getObjectSize(i)*8); // Convert to bits
+ def += " s";
+ def += utostr(i);
+ 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::EmitInstruction(const MachineInstr *MI) {
std::string str;
str.reserve(64);
- // Write instruction to str
raw_string_ostream OS(str);
- printInstruction(MI, OS);
+
+ DebugLoc DL = MI->getDebugLoc();
+ if (!DL.isUnknown()) {
+
+ const MDNode *S = DL.getScope(MF->getFunction()->getContext());
+
+ // This is taken from DwarfDebug.cpp, which is conveniently not a public
+ // LLVM class.
+ StringRef Fn;
+ StringRef Dir;
+ unsigned Src = 1;
+ if (S) {
+ DIDescriptor Scope(S);
+ if (Scope.isCompileUnit()) {
+ DICompileUnit CU(S);
+ Fn = CU.getFilename();
+ Dir = CU.getDirectory();
+ } else if (Scope.isFile()) {
+ DIFile F(S);
+ Fn = F.getFilename();
+ Dir = F.getDirectory();
+ } else if (Scope.isSubprogram()) {
+ DISubprogram SP(S);
+ Fn = SP.getFilename();
+ Dir = SP.getDirectory();
+ } else if (Scope.isLexicalBlock()) {
+ DILexicalBlock DB(S);
+ Fn = DB.getFilename();
+ Dir = DB.getDirectory();
+ } else
+ assert(0 && "Unexpected scope info");
+
+ Src = GetOrCreateSourceID(Fn, Dir);
+ }
+ OutStreamer.EmitDwarfLocDirective(Src, DL.getLine(), DL.getCol(),
+ 0, 0, 0, Fn);
+
+ const MCDwarfLoc& MDL = OutContext.getCurrentDwarfLoc();
+
+ OS << "\t.loc ";
+ OS << utostr(MDL.getFileNum());
+ OS << " ";
+ OS << utostr(MDL.getLine());
+ OS << " ";
+ OS << utostr(MDL.getColumn());
+ OS << "\n";
+ }
+
+
+ // Emit predicate
+ printPredicateOperand(MI, OS);
+
+ // Write instruction to str
+ if (MI->getOpcode() == PTX::CALL) {
+ printCall(MI, OS);
+ } else {
+ printInstruction(MI, OS);
+ }
OS << ';';
OS.flush();
- // Replace "%type" if found
- size_t pos;
- if ((pos = str.find("%type")) != std::string::npos)
- str.replace(pos, /*strlen("%type")==*/5, getInstructionTypeName(MI));
-
StringRef strref = StringRef(str);
OutStreamer.EmitRawText(strref);
}
OS << *Mang->getSymbol(MO.getGlobal());
break;
case MachineOperand::MO_Immediate:
- OS << (int) MO.getImm();
+ OS << (long) MO.getImm();
+ break;
+ case MachineOperand::MO_MachineBasicBlock:
+ OS << *MO.getMBB()->getSymbol();
break;
case MachineOperand::MO_Register:
OS << getRegisterName(MO.getReg());
break;
+ case MachineOperand::MO_FPImmediate:
+ APInt constFP = MO.getFPImm()->getValueAPF().bitcastToAPInt();
+ bool isFloat = MO.getFPImm()->getType()->getTypeID() == Type::FloatTyID;
+ // Emit 0F for 32-bit floats and 0D for 64-bit doubles.
+ if (isFloat) {
+ OS << "0F";
+ }
+ else {
+ OS << "0D";
+ }
+ // Emit the encoded floating-point value.
+ if (constFP.getZExtValue() > 0) {
+ OS << constFP.toString(16, false);
+ }
+ else {
+ OS << "00000000";
+ // If We have a double-precision zero, pad to 8-bytes.
+ if (!isFloat) {
+ OS << "00000000";
+ }
+ }
+ break;
}
}
OS << PARAM_PREFIX << (int) MI->getOperand(opNum).getImm() + 1;
}
+void PTXAsmPrinter::printReturnOperand(const MachineInstr *MI, int opNum,
+ raw_ostream &OS, const char *Modifier) {
+ OS << RETURN_PREFIX << (int) MI->getOperand(opNum).getImm() + 1;
+}
+
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))
decl += " ";
}
- // TODO: add types
- decl += ".s32 ";
- decl += gvsym->getName();
+ if (PointerType::classof(gv->getType())) {
+ PointerType* pointerTy = dyn_cast<PointerType>(gv->getType());
+ Type* elementTy = pointerTy->getElementType();
+
+ decl += ".b8 ";
+ decl += gvsym->getName();
+ decl += "[";
- if (ArrayType::classof(gv->getType()) || PointerType::classof(gv->getType()))
- 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 += ";";
const PTXMachineFunctionInfo *MFI = MF->getInfo<PTXMachineFunctionInfo>();
const bool isKernel = MFI->isKernel();
- unsigned reg;
+ const PTXSubtarget& ST = TM.getSubtarget<PTXSubtarget>();
std::string decl = isKernel ? ".entry" : ".func";
- // Print return register
- reg = MFI->retReg();
- if (!isKernel && reg != PTX::NoRegister) {
- decl += " (.reg ."; // FIXME: could it return in .param space?
- decl += getRegisterTypeName(reg);
- decl += " ";
- decl += getRegisterName(reg);
+ unsigned cnt = 0;
+
+ if (!isKernel) {
+ decl += " (";
+ for (PTXMachineFunctionInfo::ret_iterator
+ i = MFI->retRegBegin(), e = MFI->retRegEnd(), b = i;
+ i != e; ++i) {
+ if (i != b) {
+ decl += ", ";
+ }
+ decl += ".reg .";
+ decl += getRegisterTypeName(*i);
+ decl += " ";
+ decl += getRegisterName(*i);
+ }
decl += ")";
}
decl += " ";
decl += CurrentFnSym->getName().str();
- // Print parameter list
- if (!MFI->argRegEmpty()) {
- decl += " (";
- if (isKernel) {
- for (int i = 0, e = MFI->getNumArg(); i != e; ++i) {
- if (i != 0)
- decl += ", ";
- decl += ".param .s32 "; // TODO: add types
- decl += PARAM_PREFIX;
- decl += utostr(i + 1);
- }
+ decl += " (";
+
+ cnt = 0;
+
+ // Print parameters
+ for (PTXMachineFunctionInfo::reg_iterator
+ i = MFI->argRegBegin(), e = MFI->argRegEnd(), b = i;
+ i != e; ++i) {
+ if (i != b) {
+ decl += ", ";
+ }
+ if (isKernel || ST.useParamSpaceForDeviceArgs()) {
+ decl += ".param .b";
+ decl += utostr(*i);
+ decl += " ";
+ decl += PARAM_PREFIX;
+ decl += utostr(++cnt);
} else {
- for (PTXMachineFunctionInfo::reg_iterator
- i = MFI->argRegBegin(), e = MFI->argRegEnd(), b = i; i != e; ++i) {
- reg = *i;
- assert(reg != PTX::NoRegister && "Not a valid register!");
- if (i != b)
- decl += ", ";
- decl += ".reg .";
- decl += getRegisterTypeName(reg);
- decl += " ";
- decl += getRegisterName(reg);
- }
+ decl += ".reg .";
+ decl += getRegisterTypeName(*i);
+ decl += " ";
+ decl += getRegisterName(*i);
}
- decl += ")";
}
+ decl += ")";
OutStreamer.EmitRawText(Twine(decl));
}
+void PTXAsmPrinter::
+printPredicateOperand(const MachineInstr *MI, raw_ostream &O) {
+ int i = MI->findFirstPredOperandIdx();
+ if (i == -1)
+ llvm_unreachable("missing predicate operand");
+
+ unsigned reg = MI->getOperand(i).getReg();
+ int predOp = MI->getOperand(i+1).getImm();
+
+ DEBUG(dbgs() << "predicate: (" << reg << ", " << predOp << ")\n");
+
+ if (reg != PTX::NoRegister) {
+ O << '@';
+ if (predOp == PTX::PRED_NEGATE)
+ O << '!';
+ O << getRegisterName(reg);
+ }
+}
+
+void PTXAsmPrinter::
+printCall(const MachineInstr *MI, raw_ostream &O) {
+
+ O << "\tcall.uni\t";
+
+ const GlobalValue *Address = MI->getOperand(2).getGlobal();
+ O << Address->getName() << ", (";
+
+ // (0,1) : predicate register/flag
+ // (2) : callee
+ for (unsigned i = 3; i < MI->getNumOperands(); ++i) {
+ //const MachineOperand& MO = MI->getOperand(i);
+
+ printReturnOperand(MI, i, O);
+ if (i < MI->getNumOperands()-1) {
+ O << ", ";
+ }
+ }
+
+ O << ")";
+}
+
+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;
+}
+
#include "PTXGenAsmWriter.inc"
// Force static initialization.
extern "C" void LLVMInitializePTXAsmPrinter() {
- RegisterAsmPrinter<PTXAsmPrinter> X(ThePTXTarget);
+ RegisterAsmPrinter<PTXAsmPrinter> X(ThePTX32Target);
+ RegisterAsmPrinter<PTXAsmPrinter> Y(ThePTX64Target);
}
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