1 //===-- NVPTXAsmPrinter.cpp - NVPTX LLVM assembly writer ------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains a printer that converts from our internal representation
11 // of machine-dependent LLVM code to NVPTX assembly language.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "NVPTXAsmPrinter.h"
16 #include "MCTargetDesc/NVPTXMCAsmInfo.h"
17 #include "NVPTX.h"
18 #include "NVPTXInstrInfo.h"
19 #include "NVPTXNumRegisters.h"
20 #include "NVPTXRegisterInfo.h"
21 #include "NVPTXTargetMachine.h"
22 #include "NVPTXUtilities.h"
23 #include "cl_common_defines.h"
24 #include "llvm/ADT/StringExtras.h"
25 #include "llvm/Analysis/ConstantFolding.h"
26 #include "llvm/Assembly/Writer.h"
27 #include "llvm/CodeGen/Analysis.h"
28 #include "llvm/CodeGen/MachineFrameInfo.h"
29 #include "llvm/CodeGen/MachineModuleInfo.h"
30 #include "llvm/CodeGen/MachineRegisterInfo.h"
31 #include "llvm/DebugInfo.h"
32 #include "llvm/IR/DerivedTypes.h"
33 #include "llvm/IR/Function.h"
34 #include "llvm/IR/GlobalVariable.h"
35 #include "llvm/IR/Module.h"
36 #include "llvm/IR/Operator.h"
37 #include "llvm/MC/MCStreamer.h"
38 #include "llvm/MC/MCSymbol.h"
39 #include "llvm/Support/CommandLine.h"
40 #include "llvm/Support/ErrorHandling.h"
41 #include "llvm/Support/FormattedStream.h"
42 #include "llvm/Support/Path.h"
43 #include "llvm/Support/TargetRegistry.h"
44 #include "llvm/Support/TimeValue.h"
45 #include "llvm/Target/Mangler.h"
46 #include "llvm/Target/TargetLoweringObjectFile.h"
47 #include <sstream>
48 using namespace llvm;
49
50
51 #include "NVPTXGenAsmWriter.inc"
52
53 bool RegAllocNilUsed = true;
54
55 #define DEPOTNAME "__local_depot"
56
57 static cl::opt<bool>
58 EmitLineNumbers("nvptx-emit-line-numbers",
59 cl::desc("NVPTX Specific: Emit Line numbers even without -G"),
60 cl::init(true));
61
62 namespace llvm {
63 bool InterleaveSrcInPtx = false;
64 }
65
66 static cl::opt<bool, true>InterleaveSrc("nvptx-emit-src",
67 cl::ZeroOrMore,
68 cl::desc("NVPTX Specific: Emit source line in ptx file"),
69 cl::location(llvm::InterleaveSrcInPtx));
70
71
72 namespace {
73 /// DiscoverDependentGlobals - Return a set of GlobalVariables on which \p V
74 /// depends.
DiscoverDependentGlobals(Value * V,DenseSet<GlobalVariable * > & Globals)75 void DiscoverDependentGlobals(Value *V,
76 DenseSet<GlobalVariable*> &Globals) {
77 if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V))
78 Globals.insert(GV);
79 else {
80 if (User *U = dyn_cast<User>(V)) {
81 for (unsigned i = 0, e = U->getNumOperands(); i != e; ++i) {
82 DiscoverDependentGlobals(U->getOperand(i), Globals);
83 }
84 }
85 }
86 }
87
88 /// VisitGlobalVariableForEmission - Add \p GV to the list of GlobalVariable
89 /// instances to be emitted, but only after any dependents have been added
90 /// first.
VisitGlobalVariableForEmission(GlobalVariable * GV,SmallVectorImpl<GlobalVariable * > & Order,DenseSet<GlobalVariable * > & Visited,DenseSet<GlobalVariable * > & Visiting)91 void VisitGlobalVariableForEmission(GlobalVariable *GV,
92 SmallVectorImpl<GlobalVariable*> &Order,
93 DenseSet<GlobalVariable*> &Visited,
94 DenseSet<GlobalVariable*> &Visiting) {
95 // Have we already visited this one?
96 if (Visited.count(GV)) return;
97
98 // Do we have a circular dependency?
99 if (Visiting.count(GV))
100 report_fatal_error("Circular dependency found in global variable set");
101
102 // Start visiting this global
103 Visiting.insert(GV);
104
105 // Make sure we visit all dependents first
106 DenseSet<GlobalVariable*> Others;
107 for (unsigned i = 0, e = GV->getNumOperands(); i != e; ++i)
108 DiscoverDependentGlobals(GV->getOperand(i), Others);
109
110 for (DenseSet<GlobalVariable*>::iterator I = Others.begin(),
111 E = Others.end(); I != E; ++I)
112 VisitGlobalVariableForEmission(*I, Order, Visited, Visiting);
113
114 // Now we can visit ourself
115 Order.push_back(GV);
116 Visited.insert(GV);
117 Visiting.erase(GV);
118 }
119 }
120
121 // @TODO: This is a copy from AsmPrinter.cpp. The function is static, so we
122 // cannot just link to the existing version.
123 /// LowerConstant - Lower the specified LLVM Constant to an MCExpr.
124 ///
125 using namespace nvptx;
LowerConstant(const Constant * CV,AsmPrinter & AP)126 const MCExpr *nvptx::LowerConstant(const Constant *CV, AsmPrinter &AP) {
127 MCContext &Ctx = AP.OutContext;
128
129 if (CV->isNullValue() || isa<UndefValue>(CV))
130 return MCConstantExpr::Create(0, Ctx);
131
132 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV))
133 return MCConstantExpr::Create(CI->getZExtValue(), Ctx);
134
135 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
136 return MCSymbolRefExpr::Create(AP.Mang->getSymbol(GV), Ctx);
137
138 if (const BlockAddress *BA = dyn_cast<BlockAddress>(CV))
139 return MCSymbolRefExpr::Create(AP.GetBlockAddressSymbol(BA), Ctx);
140
141 const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV);
142 if (CE == 0)
143 llvm_unreachable("Unknown constant value to lower!");
144
145
146 switch (CE->getOpcode()) {
147 default:
148 // If the code isn't optimized, there may be outstanding folding
149 // opportunities. Attempt to fold the expression using DataLayout as a
150 // last resort before giving up.
151 if (Constant *C =
152 ConstantFoldConstantExpression(CE, AP.TM.getDataLayout()))
153 if (C != CE)
154 return LowerConstant(C, AP);
155
156 // Otherwise report the problem to the user.
157 {
158 std::string S;
159 raw_string_ostream OS(S);
160 OS << "Unsupported expression in static initializer: ";
161 WriteAsOperand(OS, CE, /*PrintType=*/false,
162 !AP.MF ? 0 : AP.MF->getFunction()->getParent());
163 report_fatal_error(OS.str());
164 }
165 case Instruction::GetElementPtr: {
166 const DataLayout &TD = *AP.TM.getDataLayout();
167 // Generate a symbolic expression for the byte address
168 APInt OffsetAI(TD.getPointerSizeInBits(), 0);
169 cast<GEPOperator>(CE)->accumulateConstantOffset(TD, OffsetAI);
170
171 const MCExpr *Base = LowerConstant(CE->getOperand(0), AP);
172 if (!OffsetAI)
173 return Base;
174
175 int64_t Offset = OffsetAI.getSExtValue();
176 return MCBinaryExpr::CreateAdd(Base, MCConstantExpr::Create(Offset, Ctx),
177 Ctx);
178 }
179
180 case Instruction::Trunc:
181 // We emit the value and depend on the assembler to truncate the generated
182 // expression properly. This is important for differences between
183 // blockaddress labels. Since the two labels are in the same function, it
184 // is reasonable to treat their delta as a 32-bit value.
185 // FALL THROUGH.
186 case Instruction::BitCast:
187 return LowerConstant(CE->getOperand(0), AP);
188
189 case Instruction::IntToPtr: {
190 const DataLayout &TD = *AP.TM.getDataLayout();
191 // Handle casts to pointers by changing them into casts to the appropriate
192 // integer type. This promotes constant folding and simplifies this code.
193 Constant *Op = CE->getOperand(0);
194 Op = ConstantExpr::getIntegerCast(Op, TD.getIntPtrType(CV->getContext()),
195 false/*ZExt*/);
196 return LowerConstant(Op, AP);
197 }
198
199 case Instruction::PtrToInt: {
200 const DataLayout &TD = *AP.TM.getDataLayout();
201 // Support only foldable casts to/from pointers that can be eliminated by
202 // changing the pointer to the appropriately sized integer type.
203 Constant *Op = CE->getOperand(0);
204 Type *Ty = CE->getType();
205
206 const MCExpr *OpExpr = LowerConstant(Op, AP);
207
208 // We can emit the pointer value into this slot if the slot is an
209 // integer slot equal to the size of the pointer.
210 if (TD.getTypeAllocSize(Ty) == TD.getTypeAllocSize(Op->getType()))
211 return OpExpr;
212
213 // Otherwise the pointer is smaller than the resultant integer, mask off
214 // the high bits so we are sure to get a proper truncation if the input is
215 // a constant expr.
216 unsigned InBits = TD.getTypeAllocSizeInBits(Op->getType());
217 const MCExpr *MaskExpr = MCConstantExpr::Create(~0ULL >> (64-InBits), Ctx);
218 return MCBinaryExpr::CreateAnd(OpExpr, MaskExpr, Ctx);
219 }
220
221 // The MC library also has a right-shift operator, but it isn't consistently
222 // signed or unsigned between different targets.
223 case Instruction::Add:
224 case Instruction::Sub:
225 case Instruction::Mul:
226 case Instruction::SDiv:
227 case Instruction::SRem:
228 case Instruction::Shl:
229 case Instruction::And:
230 case Instruction::Or:
231 case Instruction::Xor: {
232 const MCExpr *LHS = LowerConstant(CE->getOperand(0), AP);
233 const MCExpr *RHS = LowerConstant(CE->getOperand(1), AP);
234 switch (CE->getOpcode()) {
235 default: llvm_unreachable("Unknown binary operator constant cast expr");
236 case Instruction::Add: return MCBinaryExpr::CreateAdd(LHS, RHS, Ctx);
237 case Instruction::Sub: return MCBinaryExpr::CreateSub(LHS, RHS, Ctx);
238 case Instruction::Mul: return MCBinaryExpr::CreateMul(LHS, RHS, Ctx);
239 case Instruction::SDiv: return MCBinaryExpr::CreateDiv(LHS, RHS, Ctx);
240 case Instruction::SRem: return MCBinaryExpr::CreateMod(LHS, RHS, Ctx);
241 case Instruction::Shl: return MCBinaryExpr::CreateShl(LHS, RHS, Ctx);
242 case Instruction::And: return MCBinaryExpr::CreateAnd(LHS, RHS, Ctx);
243 case Instruction::Or: return MCBinaryExpr::CreateOr (LHS, RHS, Ctx);
244 case Instruction::Xor: return MCBinaryExpr::CreateXor(LHS, RHS, Ctx);
245 }
246 }
247 }
248 }
249
250
emitLineNumberAsDotLoc(const MachineInstr & MI)251 void NVPTXAsmPrinter::emitLineNumberAsDotLoc(const MachineInstr &MI)
252 {
253 if (!EmitLineNumbers)
254 return;
255 if (ignoreLoc(MI))
256 return;
257
258 DebugLoc curLoc = MI.getDebugLoc();
259
260 if (prevDebugLoc.isUnknown() && curLoc.isUnknown())
261 return;
262
263 if (prevDebugLoc == curLoc)
264 return;
265
266 prevDebugLoc = curLoc;
267
268 if (curLoc.isUnknown())
269 return;
270
271
272 const MachineFunction *MF = MI.getParent()->getParent();
273 //const TargetMachine &TM = MF->getTarget();
274
275 const LLVMContext &ctx = MF->getFunction()->getContext();
276 DIScope Scope(curLoc.getScope(ctx));
277
278 if (!Scope.Verify())
279 return;
280
281 StringRef fileName(Scope.getFilename());
282 StringRef dirName(Scope.getDirectory());
283 SmallString<128> FullPathName = dirName;
284 if (!dirName.empty() && !sys::path::is_absolute(fileName)) {
285 sys::path::append(FullPathName, fileName);
286 fileName = FullPathName.str();
287 }
288
289 if (filenameMap.find(fileName.str()) == filenameMap.end())
290 return;
291
292
293 // Emit the line from the source file.
294 if (llvm::InterleaveSrcInPtx)
295 this->emitSrcInText(fileName.str(), curLoc.getLine());
296
297 std::stringstream temp;
298 temp << "\t.loc " << filenameMap[fileName.str()]
299 << " " << curLoc.getLine() << " " << curLoc.getCol();
300 OutStreamer.EmitRawText(Twine(temp.str().c_str()));
301 }
302
EmitInstruction(const MachineInstr * MI)303 void NVPTXAsmPrinter::EmitInstruction(const MachineInstr *MI) {
304 SmallString<128> Str;
305 raw_svector_ostream OS(Str);
306 if (nvptxSubtarget.getDrvInterface() == NVPTX::CUDA)
307 emitLineNumberAsDotLoc(*MI);
308 printInstruction(MI, OS);
309 OutStreamer.EmitRawText(OS.str());
310 }
311
printReturnValStr(const Function * F,raw_ostream & O)312 void NVPTXAsmPrinter::printReturnValStr(const Function *F,
313 raw_ostream &O)
314 {
315 const DataLayout *TD = TM.getDataLayout();
316 const TargetLowering *TLI = TM.getTargetLowering();
317
318 Type *Ty = F->getReturnType();
319
320 bool isABI = (nvptxSubtarget.getSmVersion() >= 20);
321
322 if (Ty->getTypeID() == Type::VoidTyID)
323 return;
324
325 O << " (";
326
327 if (isABI) {
328 if (Ty->isPrimitiveType() || Ty->isIntegerTy()) {
329 unsigned size = 0;
330 if (const IntegerType *ITy = dyn_cast<IntegerType>(Ty)) {
331 size = ITy->getBitWidth();
332 if (size < 32) size = 32;
333 } else {
334 assert(Ty->isFloatingPointTy() &&
335 "Floating point type expected here");
336 size = Ty->getPrimitiveSizeInBits();
337 }
338
339 O << ".param .b" << size << " func_retval0";
340 }
341 else if (isa<PointerType>(Ty)) {
342 O << ".param .b" << TLI->getPointerTy().getSizeInBits()
343 << " func_retval0";
344 } else {
345 if ((Ty->getTypeID() == Type::StructTyID) ||
346 isa<VectorType>(Ty)) {
347 SmallVector<EVT, 16> vtparts;
348 ComputeValueVTs(*TLI, Ty, vtparts);
349 unsigned totalsz = 0;
350 for (unsigned i=0,e=vtparts.size(); i!=e; ++i) {
351 unsigned elems = 1;
352 EVT elemtype = vtparts[i];
353 if (vtparts[i].isVector()) {
354 elems = vtparts[i].getVectorNumElements();
355 elemtype = vtparts[i].getVectorElementType();
356 }
357 for (unsigned j=0, je=elems; j!=je; ++j) {
358 unsigned sz = elemtype.getSizeInBits();
359 if (elemtype.isInteger() && (sz < 8)) sz = 8;
360 totalsz += sz/8;
361 }
362 }
363 unsigned retAlignment = 0;
364 if (!llvm::getAlign(*F, 0, retAlignment))
365 retAlignment = TD->getABITypeAlignment(Ty);
366 O << ".param .align "
367 << retAlignment
368 << " .b8 func_retval0["
369 << totalsz << "]";
370 } else
371 assert(false &&
372 "Unknown return type");
373 }
374 } else {
375 SmallVector<EVT, 16> vtparts;
376 ComputeValueVTs(*TLI, Ty, vtparts);
377 unsigned idx = 0;
378 for (unsigned i=0,e=vtparts.size(); i!=e; ++i) {
379 unsigned elems = 1;
380 EVT elemtype = vtparts[i];
381 if (vtparts[i].isVector()) {
382 elems = vtparts[i].getVectorNumElements();
383 elemtype = vtparts[i].getVectorElementType();
384 }
385
386 for (unsigned j=0, je=elems; j!=je; ++j) {
387 unsigned sz = elemtype.getSizeInBits();
388 if (elemtype.isInteger() && (sz < 32)) sz = 32;
389 O << ".reg .b" << sz << " func_retval" << idx;
390 if (j<je-1) O << ", ";
391 ++idx;
392 }
393 if (i < e-1)
394 O << ", ";
395 }
396 }
397 O << ") ";
398 return;
399 }
400
printReturnValStr(const MachineFunction & MF,raw_ostream & O)401 void NVPTXAsmPrinter::printReturnValStr(const MachineFunction &MF,
402 raw_ostream &O) {
403 const Function *F = MF.getFunction();
404 printReturnValStr(F, O);
405 }
406
EmitFunctionEntryLabel()407 void NVPTXAsmPrinter::EmitFunctionEntryLabel() {
408 SmallString<128> Str;
409 raw_svector_ostream O(Str);
410
411 // Set up
412 MRI = &MF->getRegInfo();
413 F = MF->getFunction();
414 emitLinkageDirective(F,O);
415 if (llvm::isKernelFunction(*F))
416 O << ".entry ";
417 else {
418 O << ".func ";
419 printReturnValStr(*MF, O);
420 }
421
422 O << *CurrentFnSym;
423
424 emitFunctionParamList(*MF, O);
425
426 if (llvm::isKernelFunction(*F))
427 emitKernelFunctionDirectives(*F, O);
428
429 OutStreamer.EmitRawText(O.str());
430
431 prevDebugLoc = DebugLoc();
432 }
433
EmitFunctionBodyStart()434 void NVPTXAsmPrinter::EmitFunctionBodyStart() {
435 const TargetRegisterInfo &TRI = *TM.getRegisterInfo();
436 unsigned numRegClasses = TRI.getNumRegClasses();
437 VRidGlobal2LocalMap = new std::map<unsigned, unsigned>[numRegClasses+1];
438 OutStreamer.EmitRawText(StringRef("{\n"));
439 setAndEmitFunctionVirtualRegisters(*MF);
440
441 SmallString<128> Str;
442 raw_svector_ostream O(Str);
443 emitDemotedVars(MF->getFunction(), O);
444 OutStreamer.EmitRawText(O.str());
445 }
446
EmitFunctionBodyEnd()447 void NVPTXAsmPrinter::EmitFunctionBodyEnd() {
448 OutStreamer.EmitRawText(StringRef("}\n"));
449 delete []VRidGlobal2LocalMap;
450 }
451
452
453 void
emitKernelFunctionDirectives(const Function & F,raw_ostream & O) const454 NVPTXAsmPrinter::emitKernelFunctionDirectives(const Function& F,
455 raw_ostream &O) const {
456 // If the NVVM IR has some of reqntid* specified, then output
457 // the reqntid directive, and set the unspecified ones to 1.
458 // If none of reqntid* is specified, don't output reqntid directive.
459 unsigned reqntidx, reqntidy, reqntidz;
460 bool specified = false;
461 if (llvm::getReqNTIDx(F, reqntidx) == false) reqntidx = 1;
462 else specified = true;
463 if (llvm::getReqNTIDy(F, reqntidy) == false) reqntidy = 1;
464 else specified = true;
465 if (llvm::getReqNTIDz(F, reqntidz) == false) reqntidz = 1;
466 else specified = true;
467
468 if (specified)
469 O << ".reqntid " << reqntidx << ", "
470 << reqntidy << ", " << reqntidz << "\n";
471
472 // If the NVVM IR has some of maxntid* specified, then output
473 // the maxntid directive, and set the unspecified ones to 1.
474 // If none of maxntid* is specified, don't output maxntid directive.
475 unsigned maxntidx, maxntidy, maxntidz;
476 specified = false;
477 if (llvm::getMaxNTIDx(F, maxntidx) == false) maxntidx = 1;
478 else specified = true;
479 if (llvm::getMaxNTIDy(F, maxntidy) == false) maxntidy = 1;
480 else specified = true;
481 if (llvm::getMaxNTIDz(F, maxntidz) == false) maxntidz = 1;
482 else specified = true;
483
484 if (specified)
485 O << ".maxntid " << maxntidx << ", "
486 << maxntidy << ", " << maxntidz << "\n";
487
488 unsigned mincta;
489 if (llvm::getMinCTASm(F, mincta))
490 O << ".minnctapersm " << mincta << "\n";
491 }
492
493 void
getVirtualRegisterName(unsigned vr,bool isVec,raw_ostream & O)494 NVPTXAsmPrinter::getVirtualRegisterName(unsigned vr, bool isVec,
495 raw_ostream &O) {
496 const TargetRegisterClass * RC = MRI->getRegClass(vr);
497 unsigned id = RC->getID();
498
499 std::map<unsigned, unsigned> ®map = VRidGlobal2LocalMap[id];
500 unsigned mapped_vr = regmap[vr];
501
502 if (!isVec) {
503 O << getNVPTXRegClassStr(RC) << mapped_vr;
504 return;
505 }
506 report_fatal_error("Bad register!");
507 }
508
509 void
emitVirtualRegister(unsigned int vr,bool isVec,raw_ostream & O)510 NVPTXAsmPrinter::emitVirtualRegister(unsigned int vr, bool isVec,
511 raw_ostream &O) {
512 getVirtualRegisterName(vr, isVec, O);
513 }
514
printVecModifiedImmediate(const MachineOperand & MO,const char * Modifier,raw_ostream & O)515 void NVPTXAsmPrinter::printVecModifiedImmediate(const MachineOperand &MO,
516 const char *Modifier,
517 raw_ostream &O) {
518 static const char vecelem[] = {'0', '1', '2', '3', '0', '1', '2', '3'};
519 int Imm = (int)MO.getImm();
520 if(0 == strcmp(Modifier, "vecelem"))
521 O << "_" << vecelem[Imm];
522 else if(0 == strcmp(Modifier, "vecv4comm1")) {
523 if((Imm < 0) || (Imm > 3))
524 O << "//";
525 }
526 else if(0 == strcmp(Modifier, "vecv4comm2")) {
527 if((Imm < 4) || (Imm > 7))
528 O << "//";
529 }
530 else if(0 == strcmp(Modifier, "vecv4pos")) {
531 if(Imm < 0) Imm = 0;
532 O << "_" << vecelem[Imm%4];
533 }
534 else if(0 == strcmp(Modifier, "vecv2comm1")) {
535 if((Imm < 0) || (Imm > 1))
536 O << "//";
537 }
538 else if(0 == strcmp(Modifier, "vecv2comm2")) {
539 if((Imm < 2) || (Imm > 3))
540 O << "//";
541 }
542 else if(0 == strcmp(Modifier, "vecv2pos")) {
543 if(Imm < 0) Imm = 0;
544 O << "_" << vecelem[Imm%2];
545 }
546 else
547 llvm_unreachable("Unknown Modifier on immediate operand");
548 }
549
printOperand(const MachineInstr * MI,int opNum,raw_ostream & O,const char * Modifier)550 void NVPTXAsmPrinter::printOperand(const MachineInstr *MI, int opNum,
551 raw_ostream &O, const char *Modifier) {
552 const MachineOperand &MO = MI->getOperand(opNum);
553 switch (MO.getType()) {
554 case MachineOperand::MO_Register:
555 if (TargetRegisterInfo::isPhysicalRegister(MO.getReg())) {
556 if (MO.getReg() == NVPTX::VRDepot)
557 O << DEPOTNAME << getFunctionNumber();
558 else
559 O << getRegisterName(MO.getReg());
560 } else {
561 if (!Modifier)
562 emitVirtualRegister(MO.getReg(), false, O);
563 else {
564 if (strcmp(Modifier, "vecfull") == 0)
565 emitVirtualRegister(MO.getReg(), true, O);
566 else
567 llvm_unreachable(
568 "Don't know how to handle the modifier on virtual register.");
569 }
570 }
571 return;
572
573 case MachineOperand::MO_Immediate:
574 if (!Modifier)
575 O << MO.getImm();
576 else if (strstr(Modifier, "vec") == Modifier)
577 printVecModifiedImmediate(MO, Modifier, O);
578 else
579 llvm_unreachable("Don't know how to handle modifier on immediate operand");
580 return;
581
582 case MachineOperand::MO_FPImmediate:
583 printFPConstant(MO.getFPImm(), O);
584 break;
585
586 case MachineOperand::MO_GlobalAddress:
587 O << *Mang->getSymbol(MO.getGlobal());
588 break;
589
590 case MachineOperand::MO_ExternalSymbol: {
591 const char * symbname = MO.getSymbolName();
592 if (strstr(symbname, ".PARAM") == symbname) {
593 unsigned index;
594 sscanf(symbname+6, "%u[];", &index);
595 printParamName(index, O);
596 }
597 else if (strstr(symbname, ".HLPPARAM") == symbname) {
598 unsigned index;
599 sscanf(symbname+9, "%u[];", &index);
600 O << *CurrentFnSym << "_param_" << index << "_offset";
601 }
602 else
603 O << symbname;
604 break;
605 }
606
607 case MachineOperand::MO_MachineBasicBlock:
608 O << *MO.getMBB()->getSymbol();
609 return;
610
611 default:
612 llvm_unreachable("Operand type not supported.");
613 }
614 }
615
616 void NVPTXAsmPrinter::
printImplicitDef(const MachineInstr * MI,raw_ostream & O) const617 printImplicitDef(const MachineInstr *MI, raw_ostream &O) const {
618 #ifndef __OPTIMIZE__
619 O << "\t// Implicit def :";
620 //printOperand(MI, 0);
621 O << "\n";
622 #endif
623 }
624
printMemOperand(const MachineInstr * MI,int opNum,raw_ostream & O,const char * Modifier)625 void NVPTXAsmPrinter::printMemOperand(const MachineInstr *MI, int opNum,
626 raw_ostream &O, const char *Modifier) {
627 printOperand(MI, opNum, O);
628
629 if (Modifier && !strcmp(Modifier, "add")) {
630 O << ", ";
631 printOperand(MI, opNum+1, O);
632 } else {
633 if (MI->getOperand(opNum+1).isImm() &&
634 MI->getOperand(opNum+1).getImm() == 0)
635 return; // don't print ',0' or '+0'
636 O << "+";
637 printOperand(MI, opNum+1, O);
638 }
639 }
640
printLdStCode(const MachineInstr * MI,int opNum,raw_ostream & O,const char * Modifier)641 void NVPTXAsmPrinter::printLdStCode(const MachineInstr *MI, int opNum,
642 raw_ostream &O, const char *Modifier)
643 {
644 if (Modifier) {
645 const MachineOperand &MO = MI->getOperand(opNum);
646 int Imm = (int)MO.getImm();
647 if (!strcmp(Modifier, "volatile")) {
648 if (Imm)
649 O << ".volatile";
650 } else if (!strcmp(Modifier, "addsp")) {
651 switch (Imm) {
652 case NVPTX::PTXLdStInstCode::GLOBAL: O << ".global"; break;
653 case NVPTX::PTXLdStInstCode::SHARED: O << ".shared"; break;
654 case NVPTX::PTXLdStInstCode::LOCAL: O << ".local"; break;
655 case NVPTX::PTXLdStInstCode::PARAM: O << ".param"; break;
656 case NVPTX::PTXLdStInstCode::CONSTANT: O << ".const"; break;
657 case NVPTX::PTXLdStInstCode::GENERIC:
658 if (!nvptxSubtarget.hasGenericLdSt())
659 O << ".global";
660 break;
661 default:
662 llvm_unreachable("Wrong Address Space");
663 }
664 }
665 else if (!strcmp(Modifier, "sign")) {
666 if (Imm==NVPTX::PTXLdStInstCode::Signed)
667 O << "s";
668 else if (Imm==NVPTX::PTXLdStInstCode::Unsigned)
669 O << "u";
670 else
671 O << "f";
672 }
673 else if (!strcmp(Modifier, "vec")) {
674 if (Imm==NVPTX::PTXLdStInstCode::V2)
675 O << ".v2";
676 else if (Imm==NVPTX::PTXLdStInstCode::V4)
677 O << ".v4";
678 }
679 else
680 llvm_unreachable("Unknown Modifier");
681 }
682 else
683 llvm_unreachable("Empty Modifier");
684 }
685
emitDeclaration(const Function * F,raw_ostream & O)686 void NVPTXAsmPrinter::emitDeclaration (const Function *F, raw_ostream &O) {
687
688 emitLinkageDirective(F,O);
689 if (llvm::isKernelFunction(*F))
690 O << ".entry ";
691 else
692 O << ".func ";
693 printReturnValStr(F, O);
694 O << *CurrentFnSym << "\n";
695 emitFunctionParamList(F, O);
696 O << ";\n";
697 }
698
usedInGlobalVarDef(const Constant * C)699 static bool usedInGlobalVarDef(const Constant *C)
700 {
701 if (!C)
702 return false;
703
704 if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(C)) {
705 if (GV->getName().str() == "llvm.used")
706 return false;
707 return true;
708 }
709
710 for (Value::const_use_iterator ui=C->use_begin(), ue=C->use_end();
711 ui!=ue; ++ui) {
712 const Constant *C = dyn_cast<Constant>(*ui);
713 if (usedInGlobalVarDef(C))
714 return true;
715 }
716 return false;
717 }
718
usedInOneFunc(const User * U,Function const * & oneFunc)719 static bool usedInOneFunc(const User *U, Function const *&oneFunc)
720 {
721 if (const GlobalVariable *othergv = dyn_cast<GlobalVariable>(U)) {
722 if (othergv->getName().str() == "llvm.used")
723 return true;
724 }
725
726 if (const Instruction *instr = dyn_cast<Instruction>(U)) {
727 if (instr->getParent() && instr->getParent()->getParent()) {
728 const Function *curFunc = instr->getParent()->getParent();
729 if (oneFunc && (curFunc != oneFunc))
730 return false;
731 oneFunc = curFunc;
732 return true;
733 }
734 else
735 return false;
736 }
737
738 if (const MDNode *md = dyn_cast<MDNode>(U))
739 if (md->hasName() && ((md->getName().str() == "llvm.dbg.gv") ||
740 (md->getName().str() == "llvm.dbg.sp")))
741 return true;
742
743
744 for (User::const_use_iterator ui=U->use_begin(), ue=U->use_end();
745 ui!=ue; ++ui) {
746 if (usedInOneFunc(*ui, oneFunc) == false)
747 return false;
748 }
749 return true;
750 }
751
752 /* Find out if a global variable can be demoted to local scope.
753 * Currently, this is valid for CUDA shared variables, which have local
754 * scope and global lifetime. So the conditions to check are :
755 * 1. Is the global variable in shared address space?
756 * 2. Does it have internal linkage?
757 * 3. Is the global variable referenced only in one function?
758 */
canDemoteGlobalVar(const GlobalVariable * gv,Function const * & f)759 static bool canDemoteGlobalVar(const GlobalVariable *gv, Function const *&f) {
760 if (gv->hasInternalLinkage() == false)
761 return false;
762 const PointerType *Pty = gv->getType();
763 if (Pty->getAddressSpace() != llvm::ADDRESS_SPACE_SHARED)
764 return false;
765
766 const Function *oneFunc = 0;
767
768 bool flag = usedInOneFunc(gv, oneFunc);
769 if (flag == false)
770 return false;
771 if (!oneFunc)
772 return false;
773 f = oneFunc;
774 return true;
775 }
776
useFuncSeen(const Constant * C,llvm::DenseMap<const Function *,bool> & seenMap)777 static bool useFuncSeen(const Constant *C,
778 llvm::DenseMap<const Function *, bool> &seenMap) {
779 for (Value::const_use_iterator ui=C->use_begin(), ue=C->use_end();
780 ui!=ue; ++ui) {
781 if (const Constant *cu = dyn_cast<Constant>(*ui)) {
782 if (useFuncSeen(cu, seenMap))
783 return true;
784 } else if (const Instruction *I = dyn_cast<Instruction>(*ui)) {
785 const BasicBlock *bb = I->getParent();
786 if (!bb) continue;
787 const Function *caller = bb->getParent();
788 if (!caller) continue;
789 if (seenMap.find(caller) != seenMap.end())
790 return true;
791 }
792 }
793 return false;
794 }
795
emitDeclarations(Module & M,raw_ostream & O)796 void NVPTXAsmPrinter::emitDeclarations (Module &M, raw_ostream &O) {
797 llvm::DenseMap<const Function *, bool> seenMap;
798 for (Module::const_iterator FI=M.begin(), FE=M.end();
799 FI!=FE; ++FI) {
800 const Function *F = FI;
801
802 if (F->isDeclaration()) {
803 if (F->use_empty())
804 continue;
805 if (F->getIntrinsicID())
806 continue;
807 CurrentFnSym = Mang->getSymbol(F);
808 emitDeclaration(F, O);
809 continue;
810 }
811 for (Value::const_use_iterator iter=F->use_begin(),
812 iterEnd=F->use_end(); iter!=iterEnd; ++iter) {
813 if (const Constant *C = dyn_cast<Constant>(*iter)) {
814 if (usedInGlobalVarDef(C)) {
815 // The use is in the initialization of a global variable
816 // that is a function pointer, so print a declaration
817 // for the original function
818 CurrentFnSym = Mang->getSymbol(F);
819 emitDeclaration(F, O);
820 break;
821 }
822 // Emit a declaration of this function if the function that
823 // uses this constant expr has already been seen.
824 if (useFuncSeen(C, seenMap)) {
825 CurrentFnSym = Mang->getSymbol(F);
826 emitDeclaration(F, O);
827 break;
828 }
829 }
830
831 if (!isa<Instruction>(*iter)) continue;
832 const Instruction *instr = cast<Instruction>(*iter);
833 const BasicBlock *bb = instr->getParent();
834 if (!bb) continue;
835 const Function *caller = bb->getParent();
836 if (!caller) continue;
837
838 // If a caller has already been seen, then the caller is
839 // appearing in the module before the callee. so print out
840 // a declaration for the callee.
841 if (seenMap.find(caller) != seenMap.end()) {
842 CurrentFnSym = Mang->getSymbol(F);
843 emitDeclaration(F, O);
844 break;
845 }
846 }
847 seenMap[F] = true;
848 }
849 }
850
recordAndEmitFilenames(Module & M)851 void NVPTXAsmPrinter::recordAndEmitFilenames(Module &M) {
852 DebugInfoFinder DbgFinder;
853 DbgFinder.processModule(M);
854
855 unsigned i=1;
856 for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
857 E = DbgFinder.compile_unit_end(); I != E; ++I) {
858 DICompileUnit DIUnit(*I);
859 StringRef Filename(DIUnit.getFilename());
860 StringRef Dirname(DIUnit.getDirectory());
861 SmallString<128> FullPathName = Dirname;
862 if (!Dirname.empty() && !sys::path::is_absolute(Filename)) {
863 sys::path::append(FullPathName, Filename);
864 Filename = FullPathName.str();
865 }
866 if (filenameMap.find(Filename.str()) != filenameMap.end())
867 continue;
868 filenameMap[Filename.str()] = i;
869 OutStreamer.EmitDwarfFileDirective(i, "", Filename.str());
870 ++i;
871 }
872
873 for (DebugInfoFinder::iterator I = DbgFinder.subprogram_begin(),
874 E = DbgFinder.subprogram_end(); I != E; ++I) {
875 DISubprogram SP(*I);
876 StringRef Filename(SP.getFilename());
877 StringRef Dirname(SP.getDirectory());
878 SmallString<128> FullPathName = Dirname;
879 if (!Dirname.empty() && !sys::path::is_absolute(Filename)) {
880 sys::path::append(FullPathName, Filename);
881 Filename = FullPathName.str();
882 }
883 if (filenameMap.find(Filename.str()) != filenameMap.end())
884 continue;
885 filenameMap[Filename.str()] = i;
886 ++i;
887 }
888 }
889
doInitialization(Module & M)890 bool NVPTXAsmPrinter::doInitialization (Module &M) {
891
892 SmallString<128> Str1;
893 raw_svector_ostream OS1(Str1);
894
895 MMI = getAnalysisIfAvailable<MachineModuleInfo>();
896 MMI->AnalyzeModule(M);
897
898 // We need to call the parent's one explicitly.
899 //bool Result = AsmPrinter::doInitialization(M);
900
901 // Initialize TargetLoweringObjectFile.
902 const_cast<TargetLoweringObjectFile&>(getObjFileLowering())
903 .Initialize(OutContext, TM);
904
905 Mang = new Mangler(OutContext, *TM.getDataLayout());
906
907 // Emit header before any dwarf directives are emitted below.
908 emitHeader(M, OS1);
909 OutStreamer.EmitRawText(OS1.str());
910
911
912 // Already commented out
913 //bool Result = AsmPrinter::doInitialization(M);
914
915
916 if (nvptxSubtarget.getDrvInterface() == NVPTX::CUDA)
917 recordAndEmitFilenames(M);
918
919 SmallString<128> Str2;
920 raw_svector_ostream OS2(Str2);
921
922 emitDeclarations(M, OS2);
923
924 // As ptxas does not support forward references of globals, we need to first
925 // sort the list of module-level globals in def-use order. We visit each
926 // global variable in order, and ensure that we emit it *after* its dependent
927 // globals. We use a little extra memory maintaining both a set and a list to
928 // have fast searches while maintaining a strict ordering.
929 SmallVector<GlobalVariable*,8> Globals;
930 DenseSet<GlobalVariable*> GVVisited;
931 DenseSet<GlobalVariable*> GVVisiting;
932
933 // Visit each global variable, in order
934 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
935 I != E; ++I)
936 VisitGlobalVariableForEmission(I, Globals, GVVisited, GVVisiting);
937
938 assert(GVVisited.size() == M.getGlobalList().size() &&
939 "Missed a global variable");
940 assert(GVVisiting.size() == 0 && "Did not fully process a global variable");
941
942 // Print out module-level global variables in proper order
943 for (unsigned i = 0, e = Globals.size(); i != e; ++i)
944 printModuleLevelGV(Globals[i], OS2);
945
946 OS2 << '\n';
947
948 OutStreamer.EmitRawText(OS2.str());
949 return false; // success
950 }
951
emitHeader(Module & M,raw_ostream & O)952 void NVPTXAsmPrinter::emitHeader (Module &M, raw_ostream &O) {
953 O << "//\n";
954 O << "// Generated by LLVM NVPTX Back-End\n";
955 O << "//\n";
956 O << "\n";
957
958 unsigned PTXVersion = nvptxSubtarget.getPTXVersion();
959 O << ".version " << (PTXVersion / 10) << "." << (PTXVersion % 10) << "\n";
960
961 O << ".target ";
962 O << nvptxSubtarget.getTargetName();
963
964 if (nvptxSubtarget.getDrvInterface() == NVPTX::NVCL)
965 O << ", texmode_independent";
966 if (nvptxSubtarget.getDrvInterface() == NVPTX::CUDA) {
967 if (!nvptxSubtarget.hasDouble())
968 O << ", map_f64_to_f32";
969 }
970
971 if (MAI->doesSupportDebugInformation())
972 O << ", debug";
973
974 O << "\n";
975
976 O << ".address_size ";
977 if (nvptxSubtarget.is64Bit())
978 O << "64";
979 else
980 O << "32";
981 O << "\n";
982
983 O << "\n";
984 }
985
doFinalization(Module & M)986 bool NVPTXAsmPrinter::doFinalization(Module &M) {
987 // XXX Temproarily remove global variables so that doFinalization() will not
988 // emit them again (global variables are emitted at beginning).
989
990 Module::GlobalListType &global_list = M.getGlobalList();
991 int i, n = global_list.size();
992 GlobalVariable **gv_array = new GlobalVariable* [n];
993
994 // first, back-up GlobalVariable in gv_array
995 i = 0;
996 for (Module::global_iterator I = global_list.begin(), E = global_list.end();
997 I != E; ++I)
998 gv_array[i++] = &*I;
999
1000 // second, empty global_list
1001 while (!global_list.empty())
1002 global_list.remove(global_list.begin());
1003
1004 // call doFinalization
1005 bool ret = AsmPrinter::doFinalization(M);
1006
1007 // now we restore global variables
1008 for (i = 0; i < n; i ++)
1009 global_list.insert(global_list.end(), gv_array[i]);
1010
1011 delete[] gv_array;
1012 return ret;
1013
1014
1015 //bool Result = AsmPrinter::doFinalization(M);
1016 // Instead of calling the parents doFinalization, we may
1017 // clone parents doFinalization and customize here.
1018 // Currently, we if NVISA out the EmitGlobals() in
1019 // parent's doFinalization, which is too intrusive.
1020 //
1021 // Same for the doInitialization.
1022 //return Result;
1023 }
1024
1025 // This function emits appropriate linkage directives for
1026 // functions and global variables.
1027 //
1028 // extern function declaration -> .extern
1029 // extern function definition -> .visible
1030 // external global variable with init -> .visible
1031 // external without init -> .extern
1032 // appending -> not allowed, assert.
1033
emitLinkageDirective(const GlobalValue * V,raw_ostream & O)1034 void NVPTXAsmPrinter::emitLinkageDirective(const GlobalValue* V, raw_ostream &O)
1035 {
1036 if (nvptxSubtarget.getDrvInterface() == NVPTX::CUDA) {
1037 if (V->hasExternalLinkage()) {
1038 if (isa<GlobalVariable>(V)) {
1039 const GlobalVariable *GVar = cast<GlobalVariable>(V);
1040 if (GVar) {
1041 if (GVar->hasInitializer())
1042 O << ".visible ";
1043 else
1044 O << ".extern ";
1045 }
1046 } else if (V->isDeclaration())
1047 O << ".extern ";
1048 else
1049 O << ".visible ";
1050 } else if (V->hasAppendingLinkage()) {
1051 std::string msg;
1052 msg.append("Error: ");
1053 msg.append("Symbol ");
1054 if (V->hasName())
1055 msg.append(V->getName().str());
1056 msg.append("has unsupported appending linkage type");
1057 llvm_unreachable(msg.c_str());
1058 }
1059 }
1060 }
1061
1062
printModuleLevelGV(GlobalVariable * GVar,raw_ostream & O,bool processDemoted)1063 void NVPTXAsmPrinter::printModuleLevelGV(GlobalVariable* GVar, raw_ostream &O,
1064 bool processDemoted) {
1065
1066 // Skip meta data
1067 if (GVar->hasSection()) {
1068 if (GVar->getSection() == "llvm.metadata")
1069 return;
1070 }
1071
1072 const DataLayout *TD = TM.getDataLayout();
1073
1074 // GlobalVariables are always constant pointers themselves.
1075 const PointerType *PTy = GVar->getType();
1076 Type *ETy = PTy->getElementType();
1077
1078 if (GVar->hasExternalLinkage()) {
1079 if (GVar->hasInitializer())
1080 O << ".visible ";
1081 else
1082 O << ".extern ";
1083 }
1084
1085 if (llvm::isTexture(*GVar)) {
1086 O << ".global .texref " << llvm::getTextureName(*GVar) << ";\n";
1087 return;
1088 }
1089
1090 if (llvm::isSurface(*GVar)) {
1091 O << ".global .surfref " << llvm::getSurfaceName(*GVar) << ";\n";
1092 return;
1093 }
1094
1095 if (GVar->isDeclaration()) {
1096 // (extern) declarations, no definition or initializer
1097 // Currently the only known declaration is for an automatic __local
1098 // (.shared) promoted to global.
1099 emitPTXGlobalVariable(GVar, O);
1100 O << ";\n";
1101 return;
1102 }
1103
1104 if (llvm::isSampler(*GVar)) {
1105 O << ".global .samplerref " << llvm::getSamplerName(*GVar);
1106
1107 Constant *Initializer = NULL;
1108 if (GVar->hasInitializer())
1109 Initializer = GVar->getInitializer();
1110 ConstantInt *CI = NULL;
1111 if (Initializer)
1112 CI = dyn_cast<ConstantInt>(Initializer);
1113 if (CI) {
1114 unsigned sample=CI->getZExtValue();
1115
1116 O << " = { ";
1117
1118 for (int i =0, addr=((sample & __CLK_ADDRESS_MASK ) >>
1119 __CLK_ADDRESS_BASE) ; i < 3 ; i++) {
1120 O << "addr_mode_" << i << " = ";
1121 switch (addr) {
1122 case 0: O << "wrap"; break;
1123 case 1: O << "clamp_to_border"; break;
1124 case 2: O << "clamp_to_edge"; break;
1125 case 3: O << "wrap"; break;
1126 case 4: O << "mirror"; break;
1127 }
1128 O <<", ";
1129 }
1130 O << "filter_mode = ";
1131 switch (( sample & __CLK_FILTER_MASK ) >> __CLK_FILTER_BASE ) {
1132 case 0: O << "nearest"; break;
1133 case 1: O << "linear"; break;
1134 case 2: assert ( 0 && "Anisotropic filtering is not supported");
1135 default: O << "nearest"; break;
1136 }
1137 if (!(( sample &__CLK_NORMALIZED_MASK ) >> __CLK_NORMALIZED_BASE)) {
1138 O << ", force_unnormalized_coords = 1";
1139 }
1140 O << " }";
1141 }
1142
1143 O << ";\n";
1144 return;
1145 }
1146
1147 if (GVar->hasPrivateLinkage()) {
1148
1149 if (!strncmp(GVar->getName().data(), "unrollpragma", 12))
1150 return;
1151
1152 // FIXME - need better way (e.g. Metadata) to avoid generating this global
1153 if (!strncmp(GVar->getName().data(), "filename", 8))
1154 return;
1155 if (GVar->use_empty())
1156 return;
1157 }
1158
1159 const Function *demotedFunc = 0;
1160 if (!processDemoted && canDemoteGlobalVar(GVar, demotedFunc)) {
1161 O << "// " << GVar->getName().str() << " has been demoted\n";
1162 if (localDecls.find(demotedFunc) != localDecls.end())
1163 localDecls[demotedFunc].push_back(GVar);
1164 else {
1165 std::vector<GlobalVariable *> temp;
1166 temp.push_back(GVar);
1167 localDecls[demotedFunc] = temp;
1168 }
1169 return;
1170 }
1171
1172 O << ".";
1173 emitPTXAddressSpace(PTy->getAddressSpace(), O);
1174 if (GVar->getAlignment() == 0)
1175 O << " .align " << (int) TD->getPrefTypeAlignment(ETy);
1176 else
1177 O << " .align " << GVar->getAlignment();
1178
1179
1180 if (ETy->isPrimitiveType() || ETy->isIntegerTy() || isa<PointerType>(ETy)) {
1181 O << " .";
1182 O << getPTXFundamentalTypeStr(ETy, false);
1183 O << " ";
1184 O << *Mang->getSymbol(GVar);
1185
1186 // Ptx allows variable initilization only for constant and global state
1187 // spaces.
1188 if (((PTy->getAddressSpace() == llvm::ADDRESS_SPACE_GLOBAL) ||
1189 (PTy->getAddressSpace() == llvm::ADDRESS_SPACE_CONST_NOT_GEN) ||
1190 (PTy->getAddressSpace() == llvm::ADDRESS_SPACE_CONST))
1191 && GVar->hasInitializer()) {
1192 Constant *Initializer = GVar->getInitializer();
1193 if (!Initializer->isNullValue()) {
1194 O << " = " ;
1195 printScalarConstant(Initializer, O);
1196 }
1197 }
1198 } else {
1199 unsigned int ElementSize =0;
1200
1201 // Although PTX has direct support for struct type and array type and
1202 // LLVM IR is very similar to PTX, the LLVM CodeGen does not support for
1203 // targets that support these high level field accesses. Structs, arrays
1204 // and vectors are lowered into arrays of bytes.
1205 switch (ETy->getTypeID()) {
1206 case Type::StructTyID:
1207 case Type::ArrayTyID:
1208 case Type::VectorTyID:
1209 ElementSize = TD->getTypeStoreSize(ETy);
1210 // Ptx allows variable initilization only for constant and
1211 // global state spaces.
1212 if (((PTy->getAddressSpace() == llvm::ADDRESS_SPACE_GLOBAL) ||
1213 (PTy->getAddressSpace() == llvm::ADDRESS_SPACE_CONST_NOT_GEN) ||
1214 (PTy->getAddressSpace() == llvm::ADDRESS_SPACE_CONST))
1215 && GVar->hasInitializer()) {
1216 Constant *Initializer = GVar->getInitializer();
1217 if (!isa<UndefValue>(Initializer) &&
1218 !Initializer->isNullValue()) {
1219 AggBuffer aggBuffer(ElementSize, O, *this);
1220 bufferAggregateConstant(Initializer, &aggBuffer);
1221 if (aggBuffer.numSymbols) {
1222 if (nvptxSubtarget.is64Bit()) {
1223 O << " .u64 " << *Mang->getSymbol(GVar) <<"[" ;
1224 O << ElementSize/8;
1225 }
1226 else {
1227 O << " .u32 " << *Mang->getSymbol(GVar) <<"[" ;
1228 O << ElementSize/4;
1229 }
1230 O << "]";
1231 }
1232 else {
1233 O << " .b8 " << *Mang->getSymbol(GVar) <<"[" ;
1234 O << ElementSize;
1235 O << "]";
1236 }
1237 O << " = {" ;
1238 aggBuffer.print();
1239 O << "}";
1240 }
1241 else {
1242 O << " .b8 " << *Mang->getSymbol(GVar) ;
1243 if (ElementSize) {
1244 O <<"[" ;
1245 O << ElementSize;
1246 O << "]";
1247 }
1248 }
1249 }
1250 else {
1251 O << " .b8 " << *Mang->getSymbol(GVar);
1252 if (ElementSize) {
1253 O <<"[" ;
1254 O << ElementSize;
1255 O << "]";
1256 }
1257 }
1258 break;
1259 default:
1260 assert( 0 && "type not supported yet");
1261 }
1262
1263 }
1264 O << ";\n";
1265 }
1266
emitDemotedVars(const Function * f,raw_ostream & O)1267 void NVPTXAsmPrinter::emitDemotedVars(const Function *f, raw_ostream &O) {
1268 if (localDecls.find(f) == localDecls.end())
1269 return;
1270
1271 std::vector<GlobalVariable *> &gvars = localDecls[f];
1272
1273 for (unsigned i=0, e=gvars.size(); i!=e; ++i) {
1274 O << "\t// demoted variable\n\t";
1275 printModuleLevelGV(gvars[i], O, true);
1276 }
1277 }
1278
emitPTXAddressSpace(unsigned int AddressSpace,raw_ostream & O) const1279 void NVPTXAsmPrinter::emitPTXAddressSpace(unsigned int AddressSpace,
1280 raw_ostream &O) const {
1281 switch (AddressSpace) {
1282 case llvm::ADDRESS_SPACE_LOCAL:
1283 O << "local" ;
1284 break;
1285 case llvm::ADDRESS_SPACE_GLOBAL:
1286 O << "global" ;
1287 break;
1288 case llvm::ADDRESS_SPACE_CONST:
1289 // This logic should be consistent with that in
1290 // getCodeAddrSpace() (NVPTXISelDATToDAT.cpp)
1291 if (nvptxSubtarget.hasGenericLdSt())
1292 O << "global" ;
1293 else
1294 O << "const" ;
1295 break;
1296 case llvm::ADDRESS_SPACE_CONST_NOT_GEN:
1297 O << "const" ;
1298 break;
1299 case llvm::ADDRESS_SPACE_SHARED:
1300 O << "shared" ;
1301 break;
1302 default:
1303 report_fatal_error("Bad address space found while emitting PTX");
1304 break;
1305 }
1306 }
1307
getPTXFundamentalTypeStr(const Type * Ty,bool useB4PTR) const1308 std::string NVPTXAsmPrinter::getPTXFundamentalTypeStr(const Type *Ty,
1309 bool useB4PTR) const {
1310 switch (Ty->getTypeID()) {
1311 default:
1312 llvm_unreachable("unexpected type");
1313 break;
1314 case Type::IntegerTyID: {
1315 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
1316 if (NumBits == 1)
1317 return "pred";
1318 else if (NumBits <= 64) {
1319 std::string name = "u";
1320 return name + utostr(NumBits);
1321 } else {
1322 llvm_unreachable("Integer too large");
1323 break;
1324 }
1325 break;
1326 }
1327 case Type::FloatTyID:
1328 return "f32";
1329 case Type::DoubleTyID:
1330 return "f64";
1331 case Type::PointerTyID:
1332 if (nvptxSubtarget.is64Bit())
1333 if (useB4PTR) return "b64";
1334 else return "u64";
1335 else
1336 if (useB4PTR) return "b32";
1337 else return "u32";
1338 }
1339 llvm_unreachable("unexpected type");
1340 return NULL;
1341 }
1342
emitPTXGlobalVariable(const GlobalVariable * GVar,raw_ostream & O)1343 void NVPTXAsmPrinter::emitPTXGlobalVariable(const GlobalVariable* GVar,
1344 raw_ostream &O) {
1345
1346 const DataLayout *TD = TM.getDataLayout();
1347
1348 // GlobalVariables are always constant pointers themselves.
1349 const PointerType *PTy = GVar->getType();
1350 Type *ETy = PTy->getElementType();
1351
1352 O << ".";
1353 emitPTXAddressSpace(PTy->getAddressSpace(), O);
1354 if (GVar->getAlignment() == 0)
1355 O << " .align " << (int) TD->getPrefTypeAlignment(ETy);
1356 else
1357 O << " .align " << GVar->getAlignment();
1358
1359 if (ETy->isPrimitiveType() || ETy->isIntegerTy() || isa<PointerType>(ETy)) {
1360 O << " .";
1361 O << getPTXFundamentalTypeStr(ETy);
1362 O << " ";
1363 O << *Mang->getSymbol(GVar);
1364 return;
1365 }
1366
1367 int64_t ElementSize =0;
1368
1369 // Although PTX has direct support for struct type and array type and LLVM IR
1370 // is very similar to PTX, the LLVM CodeGen does not support for targets that
1371 // support these high level field accesses. Structs and arrays are lowered
1372 // into arrays of bytes.
1373 switch (ETy->getTypeID()) {
1374 case Type::StructTyID:
1375 case Type::ArrayTyID:
1376 case Type::VectorTyID:
1377 ElementSize = TD->getTypeStoreSize(ETy);
1378 O << " .b8 " << *Mang->getSymbol(GVar) <<"[" ;
1379 if (ElementSize) {
1380 O << itostr(ElementSize) ;
1381 }
1382 O << "]";
1383 break;
1384 default:
1385 assert( 0 && "type not supported yet");
1386 }
1387 return ;
1388 }
1389
1390
1391 static unsigned int
getOpenCLAlignment(const DataLayout * TD,Type * Ty)1392 getOpenCLAlignment(const DataLayout *TD,
1393 Type *Ty) {
1394 if (Ty->isPrimitiveType() || Ty->isIntegerTy() || isa<PointerType>(Ty))
1395 return TD->getPrefTypeAlignment(Ty);
1396
1397 const ArrayType *ATy = dyn_cast<ArrayType>(Ty);
1398 if (ATy)
1399 return getOpenCLAlignment(TD, ATy->getElementType());
1400
1401 const VectorType *VTy = dyn_cast<VectorType>(Ty);
1402 if (VTy) {
1403 Type *ETy = VTy->getElementType();
1404 unsigned int numE = VTy->getNumElements();
1405 unsigned int alignE = TD->getPrefTypeAlignment(ETy);
1406 if (numE == 3)
1407 return 4*alignE;
1408 else
1409 return numE*alignE;
1410 }
1411
1412 const StructType *STy = dyn_cast<StructType>(Ty);
1413 if (STy) {
1414 unsigned int alignStruct = 1;
1415 // Go through each element of the struct and find the
1416 // largest alignment.
1417 for (unsigned i=0, e=STy->getNumElements(); i != e; i++) {
1418 Type *ETy = STy->getElementType(i);
1419 unsigned int align = getOpenCLAlignment(TD, ETy);
1420 if (align > alignStruct)
1421 alignStruct = align;
1422 }
1423 return alignStruct;
1424 }
1425
1426 const FunctionType *FTy = dyn_cast<FunctionType>(Ty);
1427 if (FTy)
1428 return TD->getPointerPrefAlignment();
1429 return TD->getPrefTypeAlignment(Ty);
1430 }
1431
printParamName(Function::const_arg_iterator I,int paramIndex,raw_ostream & O)1432 void NVPTXAsmPrinter::printParamName(Function::const_arg_iterator I,
1433 int paramIndex, raw_ostream &O) {
1434 if ((nvptxSubtarget.getDrvInterface() == NVPTX::NVCL) ||
1435 (nvptxSubtarget.getDrvInterface() == NVPTX::CUDA))
1436 O << *CurrentFnSym << "_param_" << paramIndex;
1437 else {
1438 std::string argName = I->getName();
1439 const char *p = argName.c_str();
1440 while (*p) {
1441 if (*p == '.')
1442 O << "_";
1443 else
1444 O << *p;
1445 p++;
1446 }
1447 }
1448 }
1449
printParamName(int paramIndex,raw_ostream & O)1450 void NVPTXAsmPrinter::printParamName(int paramIndex, raw_ostream &O) {
1451 Function::const_arg_iterator I, E;
1452 int i = 0;
1453
1454 if ((nvptxSubtarget.getDrvInterface() == NVPTX::NVCL) ||
1455 (nvptxSubtarget.getDrvInterface() == NVPTX::CUDA)) {
1456 O << *CurrentFnSym << "_param_" << paramIndex;
1457 return;
1458 }
1459
1460 for (I = F->arg_begin(), E = F->arg_end(); I != E; ++I, i++) {
1461 if (i==paramIndex) {
1462 printParamName(I, paramIndex, O);
1463 return;
1464 }
1465 }
1466 llvm_unreachable("paramIndex out of bound");
1467 }
1468
emitFunctionParamList(const Function * F,raw_ostream & O)1469 void NVPTXAsmPrinter::emitFunctionParamList(const Function *F,
1470 raw_ostream &O) {
1471 const DataLayout *TD = TM.getDataLayout();
1472 const AttributeSet &PAL = F->getAttributes();
1473 const TargetLowering *TLI = TM.getTargetLowering();
1474 Function::const_arg_iterator I, E;
1475 unsigned paramIndex = 0;
1476 bool first = true;
1477 bool isKernelFunc = llvm::isKernelFunction(*F);
1478 bool isABI = (nvptxSubtarget.getSmVersion() >= 20);
1479 MVT thePointerTy = TLI->getPointerTy();
1480
1481 O << "(\n";
1482
1483 for (I = F->arg_begin(), E = F->arg_end(); I != E; ++I, paramIndex++) {
1484 const Type *Ty = I->getType();
1485
1486 if (!first)
1487 O << ",\n";
1488
1489 first = false;
1490
1491 // Handle image/sampler parameters
1492 if (llvm::isSampler(*I) || llvm::isImage(*I)) {
1493 if (llvm::isImage(*I)) {
1494 std::string sname = I->getName();
1495 if (llvm::isImageWriteOnly(*I))
1496 O << "\t.param .surfref " << *CurrentFnSym << "_param_" << paramIndex;
1497 else // Default image is read_only
1498 O << "\t.param .texref " << *CurrentFnSym << "_param_" << paramIndex;
1499 }
1500 else // Should be llvm::isSampler(*I)
1501 O << "\t.param .samplerref " << *CurrentFnSym << "_param_"
1502 << paramIndex;
1503 continue;
1504 }
1505
1506 if (PAL.hasAttribute(paramIndex+1, Attribute::ByVal) == false) {
1507 // Just a scalar
1508 const PointerType *PTy = dyn_cast<PointerType>(Ty);
1509 if (isKernelFunc) {
1510 if (PTy) {
1511 // Special handling for pointer arguments to kernel
1512 O << "\t.param .u" << thePointerTy.getSizeInBits() << " ";
1513
1514 if (nvptxSubtarget.getDrvInterface() != NVPTX::CUDA) {
1515 Type *ETy = PTy->getElementType();
1516 int addrSpace = PTy->getAddressSpace();
1517 switch(addrSpace) {
1518 default:
1519 O << ".ptr ";
1520 break;
1521 case llvm::ADDRESS_SPACE_CONST_NOT_GEN:
1522 O << ".ptr .const ";
1523 break;
1524 case llvm::ADDRESS_SPACE_SHARED:
1525 O << ".ptr .shared ";
1526 break;
1527 case llvm::ADDRESS_SPACE_GLOBAL:
1528 case llvm::ADDRESS_SPACE_CONST:
1529 O << ".ptr .global ";
1530 break;
1531 }
1532 O << ".align " << (int)getOpenCLAlignment(TD, ETy) << " ";
1533 }
1534 printParamName(I, paramIndex, O);
1535 continue;
1536 }
1537
1538 // non-pointer scalar to kernel func
1539 O << "\t.param ."
1540 << getPTXFundamentalTypeStr(Ty) << " ";
1541 printParamName(I, paramIndex, O);
1542 continue;
1543 }
1544 // Non-kernel function, just print .param .b<size> for ABI
1545 // and .reg .b<size> for non ABY
1546 unsigned sz = 0;
1547 if (isa<IntegerType>(Ty)) {
1548 sz = cast<IntegerType>(Ty)->getBitWidth();
1549 if (sz < 32) sz = 32;
1550 }
1551 else if (isa<PointerType>(Ty))
1552 sz = thePointerTy.getSizeInBits();
1553 else
1554 sz = Ty->getPrimitiveSizeInBits();
1555 if (isABI)
1556 O << "\t.param .b" << sz << " ";
1557 else
1558 O << "\t.reg .b" << sz << " ";
1559 printParamName(I, paramIndex, O);
1560 continue;
1561 }
1562
1563 // param has byVal attribute. So should be a pointer
1564 const PointerType *PTy = dyn_cast<PointerType>(Ty);
1565 assert(PTy &&
1566 "Param with byval attribute should be a pointer type");
1567 Type *ETy = PTy->getElementType();
1568
1569 if (isABI || isKernelFunc) {
1570 // Just print .param .b8 .align <a> .param[size];
1571 // <a> = PAL.getparamalignment
1572 // size = typeallocsize of element type
1573 unsigned align = PAL.getParamAlignment(paramIndex+1);
1574 if (align == 0)
1575 align = TD->getABITypeAlignment(ETy);
1576
1577 unsigned sz = TD->getTypeAllocSize(ETy);
1578 O << "\t.param .align " << align
1579 << " .b8 ";
1580 printParamName(I, paramIndex, O);
1581 O << "[" << sz << "]";
1582 continue;
1583 } else {
1584 // Split the ETy into constituent parts and
1585 // print .param .b<size> <name> for each part.
1586 // Further, if a part is vector, print the above for
1587 // each vector element.
1588 SmallVector<EVT, 16> vtparts;
1589 ComputeValueVTs(*TLI, ETy, vtparts);
1590 for (unsigned i=0,e=vtparts.size(); i!=e; ++i) {
1591 unsigned elems = 1;
1592 EVT elemtype = vtparts[i];
1593 if (vtparts[i].isVector()) {
1594 elems = vtparts[i].getVectorNumElements();
1595 elemtype = vtparts[i].getVectorElementType();
1596 }
1597
1598 for (unsigned j=0,je=elems; j!=je; ++j) {
1599 unsigned sz = elemtype.getSizeInBits();
1600 if (elemtype.isInteger() && (sz < 32)) sz = 32;
1601 O << "\t.reg .b" << sz << " ";
1602 printParamName(I, paramIndex, O);
1603 if (j<je-1) O << ",\n";
1604 ++paramIndex;
1605 }
1606 if (i<e-1)
1607 O << ",\n";
1608 }
1609 --paramIndex;
1610 continue;
1611 }
1612 }
1613
1614 O << "\n)\n";
1615 }
1616
emitFunctionParamList(const MachineFunction & MF,raw_ostream & O)1617 void NVPTXAsmPrinter::emitFunctionParamList(const MachineFunction &MF,
1618 raw_ostream &O) {
1619 const Function *F = MF.getFunction();
1620 emitFunctionParamList(F, O);
1621 }
1622
1623
1624 void NVPTXAsmPrinter::
setAndEmitFunctionVirtualRegisters(const MachineFunction & MF)1625 setAndEmitFunctionVirtualRegisters(const MachineFunction &MF) {
1626 SmallString<128> Str;
1627 raw_svector_ostream O(Str);
1628
1629 // Map the global virtual register number to a register class specific
1630 // virtual register number starting from 1 with that class.
1631 const TargetRegisterInfo *TRI = MF.getTarget().getRegisterInfo();
1632 //unsigned numRegClasses = TRI->getNumRegClasses();
1633
1634 // Emit the Fake Stack Object
1635 const MachineFrameInfo *MFI = MF.getFrameInfo();
1636 int NumBytes = (int) MFI->getStackSize();
1637 if (NumBytes) {
1638 O << "\t.local .align " << MFI->getMaxAlignment() << " .b8 \t"
1639 << DEPOTNAME
1640 << getFunctionNumber() << "[" << NumBytes << "];\n";
1641 if (nvptxSubtarget.is64Bit()) {
1642 O << "\t.reg .b64 \t%SP;\n";
1643 O << "\t.reg .b64 \t%SPL;\n";
1644 }
1645 else {
1646 O << "\t.reg .b32 \t%SP;\n";
1647 O << "\t.reg .b32 \t%SPL;\n";
1648 }
1649 }
1650
1651 // Go through all virtual registers to establish the mapping between the
1652 // global virtual
1653 // register number and the per class virtual register number.
1654 // We use the per class virtual register number in the ptx output.
1655 unsigned int numVRs = MRI->getNumVirtRegs();
1656 for (unsigned i=0; i< numVRs; i++) {
1657 unsigned int vr = TRI->index2VirtReg(i);
1658 const TargetRegisterClass *RC = MRI->getRegClass(vr);
1659 std::map<unsigned, unsigned> ®map = VRidGlobal2LocalMap[RC->getID()];
1660 int n = regmap.size();
1661 regmap.insert(std::make_pair(vr, n+1));
1662 }
1663
1664 // Emit register declarations
1665 // @TODO: Extract out the real register usage
1666 O << "\t.reg .pred %p<" << NVPTXNumRegisters << ">;\n";
1667 O << "\t.reg .s16 %rc<" << NVPTXNumRegisters << ">;\n";
1668 O << "\t.reg .s16 %rs<" << NVPTXNumRegisters << ">;\n";
1669 O << "\t.reg .s32 %r<" << NVPTXNumRegisters << ">;\n";
1670 O << "\t.reg .s64 %rl<" << NVPTXNumRegisters << ">;\n";
1671 O << "\t.reg .f32 %f<" << NVPTXNumRegisters << ">;\n";
1672 O << "\t.reg .f64 %fl<" << NVPTXNumRegisters << ">;\n";
1673
1674 // Emit declaration of the virtual registers or 'physical' registers for
1675 // each register class
1676 //for (unsigned i=0; i< numRegClasses; i++) {
1677 // std::map<unsigned, unsigned> ®map = VRidGlobal2LocalMap[i];
1678 // const TargetRegisterClass *RC = TRI->getRegClass(i);
1679 // std::string rcname = getNVPTXRegClassName(RC);
1680 // std::string rcStr = getNVPTXRegClassStr(RC);
1681 // //int n = regmap.size();
1682 // if (!isNVPTXVectorRegClass(RC)) {
1683 // O << "\t.reg " << rcname << " \t" << rcStr << "<"
1684 // << NVPTXNumRegisters << ">;\n";
1685 // }
1686
1687 // Only declare those registers that may be used. And do not emit vector
1688 // registers as
1689 // they are all elementized to scalar registers.
1690 //if (n && !isNVPTXVectorRegClass(RC)) {
1691 // if (RegAllocNilUsed) {
1692 // O << "\t.reg " << rcname << " \t" << rcStr << "<" << (n+1)
1693 // << ">;\n";
1694 // }
1695 // else {
1696 // O << "\t.reg " << rcname << " \t" << StrToUpper(rcStr)
1697 // << "<" << 32 << ">;\n";
1698 // }
1699 //}
1700 //}
1701
1702 OutStreamer.EmitRawText(O.str());
1703 }
1704
1705
printFPConstant(const ConstantFP * Fp,raw_ostream & O)1706 void NVPTXAsmPrinter::printFPConstant(const ConstantFP *Fp, raw_ostream &O) {
1707 APFloat APF = APFloat(Fp->getValueAPF()); // make a copy
1708 bool ignored;
1709 unsigned int numHex;
1710 const char *lead;
1711
1712 if (Fp->getType()->getTypeID()==Type::FloatTyID) {
1713 numHex = 8;
1714 lead = "0f";
1715 APF.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven,
1716 &ignored);
1717 } else if (Fp->getType()->getTypeID() == Type::DoubleTyID) {
1718 numHex = 16;
1719 lead = "0d";
1720 APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
1721 &ignored);
1722 } else
1723 llvm_unreachable("unsupported fp type");
1724
1725 APInt API = APF.bitcastToAPInt();
1726 std::string hexstr(utohexstr(API.getZExtValue()));
1727 O << lead;
1728 if (hexstr.length() < numHex)
1729 O << std::string(numHex - hexstr.length(), '0');
1730 O << utohexstr(API.getZExtValue());
1731 }
1732
printScalarConstant(Constant * CPV,raw_ostream & O)1733 void NVPTXAsmPrinter::printScalarConstant(Constant *CPV, raw_ostream &O) {
1734 if (ConstantInt *CI = dyn_cast<ConstantInt>(CPV)) {
1735 O << CI->getValue();
1736 return;
1737 }
1738 if (ConstantFP *CFP = dyn_cast<ConstantFP>(CPV)) {
1739 printFPConstant(CFP, O);
1740 return;
1741 }
1742 if (isa<ConstantPointerNull>(CPV)) {
1743 O << "0";
1744 return;
1745 }
1746 if (GlobalValue *GVar = dyn_cast<GlobalValue>(CPV)) {
1747 O << *Mang->getSymbol(GVar);
1748 return;
1749 }
1750 if (ConstantExpr *Cexpr = dyn_cast<ConstantExpr>(CPV)) {
1751 Value *v = Cexpr->stripPointerCasts();
1752 if (GlobalValue *GVar = dyn_cast<GlobalValue>(v)) {
1753 O << *Mang->getSymbol(GVar);
1754 return;
1755 } else {
1756 O << *LowerConstant(CPV, *this);
1757 return;
1758 }
1759 }
1760 llvm_unreachable("Not scalar type found in printScalarConstant()");
1761 }
1762
1763
bufferLEByte(Constant * CPV,int Bytes,AggBuffer * aggBuffer)1764 void NVPTXAsmPrinter::bufferLEByte(Constant *CPV, int Bytes,
1765 AggBuffer *aggBuffer) {
1766
1767 const DataLayout *TD = TM.getDataLayout();
1768
1769 if (isa<UndefValue>(CPV) || CPV->isNullValue()) {
1770 int s = TD->getTypeAllocSize(CPV->getType());
1771 if (s<Bytes)
1772 s = Bytes;
1773 aggBuffer->addZeros(s);
1774 return;
1775 }
1776
1777 unsigned char *ptr;
1778 switch (CPV->getType()->getTypeID()) {
1779
1780 case Type::IntegerTyID: {
1781 const Type *ETy = CPV->getType();
1782 if ( ETy == Type::getInt8Ty(CPV->getContext()) ){
1783 unsigned char c =
1784 (unsigned char)(dyn_cast<ConstantInt>(CPV))->getZExtValue();
1785 ptr = &c;
1786 aggBuffer->addBytes(ptr, 1, Bytes);
1787 } else if ( ETy == Type::getInt16Ty(CPV->getContext()) ) {
1788 short int16 =
1789 (short)(dyn_cast<ConstantInt>(CPV))->getZExtValue();
1790 ptr = (unsigned char*)&int16;
1791 aggBuffer->addBytes(ptr, 2, Bytes);
1792 } else if ( ETy == Type::getInt32Ty(CPV->getContext()) ) {
1793 if (ConstantInt *constInt = dyn_cast<ConstantInt>(CPV)) {
1794 int int32 =(int)(constInt->getZExtValue());
1795 ptr = (unsigned char*)&int32;
1796 aggBuffer->addBytes(ptr, 4, Bytes);
1797 break;
1798 } else if (ConstantExpr *Cexpr = dyn_cast<ConstantExpr>(CPV)) {
1799 if (ConstantInt *constInt =
1800 dyn_cast<ConstantInt>(ConstantFoldConstantExpression(
1801 Cexpr, TD))) {
1802 int int32 =(int)(constInt->getZExtValue());
1803 ptr = (unsigned char*)&int32;
1804 aggBuffer->addBytes(ptr, 4, Bytes);
1805 break;
1806 }
1807 if (Cexpr->getOpcode() == Instruction::PtrToInt) {
1808 Value *v = Cexpr->getOperand(0)->stripPointerCasts();
1809 aggBuffer->addSymbol(v);
1810 aggBuffer->addZeros(4);
1811 break;
1812 }
1813 }
1814 llvm_unreachable("unsupported integer const type");
1815 } else if (ETy == Type::getInt64Ty(CPV->getContext()) ) {
1816 if (ConstantInt *constInt = dyn_cast<ConstantInt>(CPV)) {
1817 long long int64 =(long long)(constInt->getZExtValue());
1818 ptr = (unsigned char*)&int64;
1819 aggBuffer->addBytes(ptr, 8, Bytes);
1820 break;
1821 } else if (ConstantExpr *Cexpr = dyn_cast<ConstantExpr>(CPV)) {
1822 if (ConstantInt *constInt = dyn_cast<ConstantInt>(
1823 ConstantFoldConstantExpression(Cexpr, TD))) {
1824 long long int64 =(long long)(constInt->getZExtValue());
1825 ptr = (unsigned char*)&int64;
1826 aggBuffer->addBytes(ptr, 8, Bytes);
1827 break;
1828 }
1829 if (Cexpr->getOpcode() == Instruction::PtrToInt) {
1830 Value *v = Cexpr->getOperand(0)->stripPointerCasts();
1831 aggBuffer->addSymbol(v);
1832 aggBuffer->addZeros(8);
1833 break;
1834 }
1835 }
1836 llvm_unreachable("unsupported integer const type");
1837 } else
1838 llvm_unreachable("unsupported integer const type");
1839 break;
1840 }
1841 case Type::FloatTyID:
1842 case Type::DoubleTyID: {
1843 ConstantFP *CFP = dyn_cast<ConstantFP>(CPV);
1844 const Type* Ty = CFP->getType();
1845 if (Ty == Type::getFloatTy(CPV->getContext())) {
1846 float float32 = (float)CFP->getValueAPF().convertToFloat();
1847 ptr = (unsigned char*)&float32;
1848 aggBuffer->addBytes(ptr, 4, Bytes);
1849 } else if (Ty == Type::getDoubleTy(CPV->getContext())) {
1850 double float64 = CFP->getValueAPF().convertToDouble();
1851 ptr = (unsigned char*)&float64;
1852 aggBuffer->addBytes(ptr, 8, Bytes);
1853 }
1854 else {
1855 llvm_unreachable("unsupported fp const type");
1856 }
1857 break;
1858 }
1859 case Type::PointerTyID: {
1860 if (GlobalValue *GVar = dyn_cast<GlobalValue>(CPV)) {
1861 aggBuffer->addSymbol(GVar);
1862 }
1863 else if (ConstantExpr *Cexpr = dyn_cast<ConstantExpr>(CPV)) {
1864 Value *v = Cexpr->stripPointerCasts();
1865 aggBuffer->addSymbol(v);
1866 }
1867 unsigned int s = TD->getTypeAllocSize(CPV->getType());
1868 aggBuffer->addZeros(s);
1869 break;
1870 }
1871
1872 case Type::ArrayTyID:
1873 case Type::VectorTyID:
1874 case Type::StructTyID: {
1875 if (isa<ConstantArray>(CPV) || isa<ConstantVector>(CPV) ||
1876 isa<ConstantStruct>(CPV)) {
1877 int ElementSize = TD->getTypeAllocSize(CPV->getType());
1878 bufferAggregateConstant(CPV, aggBuffer);
1879 if ( Bytes > ElementSize )
1880 aggBuffer->addZeros(Bytes-ElementSize);
1881 }
1882 else if (isa<ConstantAggregateZero>(CPV))
1883 aggBuffer->addZeros(Bytes);
1884 else
1885 llvm_unreachable("Unexpected Constant type");
1886 break;
1887 }
1888
1889 default:
1890 llvm_unreachable("unsupported type");
1891 }
1892 }
1893
bufferAggregateConstant(Constant * CPV,AggBuffer * aggBuffer)1894 void NVPTXAsmPrinter::bufferAggregateConstant(Constant *CPV,
1895 AggBuffer *aggBuffer) {
1896 const DataLayout *TD = TM.getDataLayout();
1897 int Bytes;
1898
1899 // Old constants
1900 if (isa<ConstantArray>(CPV) || isa<ConstantVector>(CPV)) {
1901 if (CPV->getNumOperands())
1902 for (unsigned i = 0, e = CPV->getNumOperands(); i != e; ++i)
1903 bufferLEByte(cast<Constant>(CPV->getOperand(i)), 0, aggBuffer);
1904 return;
1905 }
1906
1907 if (const ConstantDataSequential *CDS =
1908 dyn_cast<ConstantDataSequential>(CPV)) {
1909 if (CDS->getNumElements())
1910 for (unsigned i = 0; i < CDS->getNumElements(); ++i)
1911 bufferLEByte(cast<Constant>(CDS->getElementAsConstant(i)), 0,
1912 aggBuffer);
1913 return;
1914 }
1915
1916
1917 if (isa<ConstantStruct>(CPV)) {
1918 if (CPV->getNumOperands()) {
1919 StructType *ST = cast<StructType>(CPV->getType());
1920 for (unsigned i = 0, e = CPV->getNumOperands(); i != e; ++i) {
1921 if ( i == (e - 1))
1922 Bytes = TD->getStructLayout(ST)->getElementOffset(0) +
1923 TD->getTypeAllocSize(ST)
1924 - TD->getStructLayout(ST)->getElementOffset(i);
1925 else
1926 Bytes = TD->getStructLayout(ST)->getElementOffset(i+1) -
1927 TD->getStructLayout(ST)->getElementOffset(i);
1928 bufferLEByte(cast<Constant>(CPV->getOperand(i)), Bytes,
1929 aggBuffer);
1930 }
1931 }
1932 return;
1933 }
1934 llvm_unreachable("unsupported constant type in printAggregateConstant()");
1935 }
1936
1937 // buildTypeNameMap - Run through symbol table looking for type names.
1938 //
1939
1940
isImageType(const Type * Ty)1941 bool NVPTXAsmPrinter::isImageType(const Type *Ty) {
1942
1943 std::map<const Type *, std::string>::iterator PI = TypeNameMap.find(Ty);
1944
1945 if (PI != TypeNameMap.end() &&
1946 (!PI->second.compare("struct._image1d_t") ||
1947 !PI->second.compare("struct._image2d_t") ||
1948 !PI->second.compare("struct._image3d_t")))
1949 return true;
1950
1951 return false;
1952 }
1953
1954 /// PrintAsmOperand - Print out an operand for an inline asm expression.
1955 ///
PrintAsmOperand(const MachineInstr * MI,unsigned OpNo,unsigned AsmVariant,const char * ExtraCode,raw_ostream & O)1956 bool NVPTXAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1957 unsigned AsmVariant,
1958 const char *ExtraCode,
1959 raw_ostream &O) {
1960 if (ExtraCode && ExtraCode[0]) {
1961 if (ExtraCode[1] != 0) return true; // Unknown modifier.
1962
1963 switch (ExtraCode[0]) {
1964 default:
1965 // See if this is a generic print operand
1966 return AsmPrinter::PrintAsmOperand(MI, OpNo, AsmVariant, ExtraCode, O);
1967 case 'r':
1968 break;
1969 }
1970 }
1971
1972 printOperand(MI, OpNo, O);
1973
1974 return false;
1975 }
1976
PrintAsmMemoryOperand(const MachineInstr * MI,unsigned OpNo,unsigned AsmVariant,const char * ExtraCode,raw_ostream & O)1977 bool NVPTXAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
1978 unsigned OpNo,
1979 unsigned AsmVariant,
1980 const char *ExtraCode,
1981 raw_ostream &O) {
1982 if (ExtraCode && ExtraCode[0])
1983 return true; // Unknown modifier
1984
1985 O << '[';
1986 printMemOperand(MI, OpNo, O);
1987 O << ']';
1988
1989 return false;
1990 }
1991
ignoreLoc(const MachineInstr & MI)1992 bool NVPTXAsmPrinter::ignoreLoc(const MachineInstr &MI)
1993 {
1994 switch(MI.getOpcode()) {
1995 default:
1996 return false;
1997 case NVPTX::CallArgBeginInst: case NVPTX::CallArgEndInst0:
1998 case NVPTX::CallArgEndInst1: case NVPTX::CallArgF32:
1999 case NVPTX::CallArgF64: case NVPTX::CallArgI16:
2000 case NVPTX::CallArgI32: case NVPTX::CallArgI32imm:
2001 case NVPTX::CallArgI64: case NVPTX::CallArgI8:
2002 case NVPTX::CallArgParam: case NVPTX::CallVoidInst:
2003 case NVPTX::CallVoidInstReg: case NVPTX::Callseq_End:
2004 case NVPTX::CallVoidInstReg64:
2005 case NVPTX::DeclareParamInst: case NVPTX::DeclareRetMemInst:
2006 case NVPTX::DeclareRetRegInst: case NVPTX::DeclareRetScalarInst:
2007 case NVPTX::DeclareScalarParamInst: case NVPTX::DeclareScalarRegInst:
2008 case NVPTX::StoreParamF32: case NVPTX::StoreParamF64:
2009 case NVPTX::StoreParamI16: case NVPTX::StoreParamI32:
2010 case NVPTX::StoreParamI64: case NVPTX::StoreParamI8:
2011 case NVPTX::StoreParamS32I8: case NVPTX::StoreParamU32I8:
2012 case NVPTX::StoreParamS32I16: case NVPTX::StoreParamU32I16:
2013 case NVPTX::StoreRetvalF32: case NVPTX::StoreRetvalF64:
2014 case NVPTX::StoreRetvalI16: case NVPTX::StoreRetvalI32:
2015 case NVPTX::StoreRetvalI64: case NVPTX::StoreRetvalI8:
2016 case NVPTX::LastCallArgF32: case NVPTX::LastCallArgF64:
2017 case NVPTX::LastCallArgI16: case NVPTX::LastCallArgI32:
2018 case NVPTX::LastCallArgI32imm: case NVPTX::LastCallArgI64:
2019 case NVPTX::LastCallArgI8: case NVPTX::LastCallArgParam:
2020 case NVPTX::LoadParamMemF32: case NVPTX::LoadParamMemF64:
2021 case NVPTX::LoadParamMemI16: case NVPTX::LoadParamMemI32:
2022 case NVPTX::LoadParamMemI64: case NVPTX::LoadParamMemI8:
2023 case NVPTX::LoadParamRegF32: case NVPTX::LoadParamRegF64:
2024 case NVPTX::LoadParamRegI16: case NVPTX::LoadParamRegI32:
2025 case NVPTX::LoadParamRegI64: case NVPTX::LoadParamRegI8:
2026 case NVPTX::PrototypeInst: case NVPTX::DBG_VALUE:
2027 return true;
2028 }
2029 return false;
2030 }
2031
2032 // Force static initialization.
LLVMInitializeNVPTXBackendAsmPrinter()2033 extern "C" void LLVMInitializeNVPTXBackendAsmPrinter() {
2034 RegisterAsmPrinter<NVPTXAsmPrinter> X(TheNVPTXTarget32);
2035 RegisterAsmPrinter<NVPTXAsmPrinter> Y(TheNVPTXTarget64);
2036 }
2037
2038
emitSrcInText(StringRef filename,unsigned line)2039 void NVPTXAsmPrinter::emitSrcInText(StringRef filename, unsigned line) {
2040 std::stringstream temp;
2041 LineReader * reader = this->getReader(filename.str());
2042 temp << "\n//";
2043 temp << filename.str();
2044 temp << ":";
2045 temp << line;
2046 temp << " ";
2047 temp << reader->readLine(line);
2048 temp << "\n";
2049 this->OutStreamer.EmitRawText(Twine(temp.str()));
2050 }
2051
2052
getReader(std::string filename)2053 LineReader *NVPTXAsmPrinter::getReader(std::string filename) {
2054 if (reader == NULL) {
2055 reader = new LineReader(filename);
2056 }
2057
2058 if (reader->fileName() != filename) {
2059 delete reader;
2060 reader = new LineReader(filename);
2061 }
2062
2063 return reader;
2064 }
2065
2066
2067 std::string
readLine(unsigned lineNum)2068 LineReader::readLine(unsigned lineNum) {
2069 if (lineNum < theCurLine) {
2070 theCurLine = 0;
2071 fstr.seekg(0,std::ios::beg);
2072 }
2073 while (theCurLine < lineNum) {
2074 fstr.getline(buff,500);
2075 theCurLine++;
2076 }
2077 return buff;
2078 }
2079
2080 // Force static initialization.
LLVMInitializeNVPTXAsmPrinter()2081 extern "C" void LLVMInitializeNVPTXAsmPrinter() {
2082 RegisterAsmPrinter<NVPTXAsmPrinter> X(TheNVPTXTarget32);
2083 RegisterAsmPrinter<NVPTXAsmPrinter> Y(TheNVPTXTarget64);
2084 }
2085