1 //===-- SparcV9CodeEmitter.cpp - --------===//
4 //===----------------------------------------------------------------------===//
6 #include "llvm/Constants.h"
7 #include "llvm/Function.h"
8 #include "llvm/GlobalVariable.h"
9 #include "llvm/PassManager.h"
10 #include "llvm/CodeGen/MachineCodeEmitter.h"
11 #include "llvm/CodeGen/MachineConstantPool.h"
12 #include "llvm/CodeGen/MachineFunctionInfo.h"
13 #include "llvm/CodeGen/MachineFunctionPass.h"
14 #include "llvm/CodeGen/MachineInstr.h"
15 #include "llvm/Target/TargetMachine.h"
16 #include "llvm/Target/TargetData.h"
17 #include "Support/Statistic.h"
18 #include "Support/hash_set"
19 #include "SparcInternals.h"
20 #include "SparcV9CodeEmitter.h"
22 bool UltraSparc::addPassesToEmitMachineCode(PassManager &PM,
23 MachineCodeEmitter &MCE) {
24 MachineCodeEmitter *M = &MCE;
25 DEBUG(MachineCodeEmitter::createFilePrinterEmitter(MCE));
26 PM.add(new SparcV9CodeEmitter(*this, *M));
27 PM.add(createMachineCodeDestructionPass()); // Free stuff no longer needed
33 SparcV9CodeEmitter &SparcV9;
34 MachineCodeEmitter &MCE;
36 // LazyCodeGenMap - Keep track of call sites for functions that are to be
38 std::map<uint64_t, Function*> LazyCodeGenMap;
40 // LazyResolverMap - Keep track of the lazy resolver created for a
41 // particular function so that we can reuse them if necessary.
42 std::map<Function*, uint64_t> LazyResolverMap;
44 JITResolver(SparcV9CodeEmitter &V9,
45 MachineCodeEmitter &mce) : SparcV9(V9), MCE(mce) {}
46 uint64_t getLazyResolver(Function *F);
47 uint64_t addFunctionReference(uint64_t Address, Function *F);
49 // Utility functions for accessing data from static callback
50 uint64_t getCurrentPCValue() {
51 return MCE.getCurrentPCValue();
53 unsigned getBinaryCodeForInstr(MachineInstr &MI) {
54 return SparcV9.getBinaryCodeForInstr(MI);
57 inline uint64_t insertFarJumpAtAddr(int64_t Value, uint64_t Addr);
60 uint64_t emitStubForFunction(Function *F);
61 static void CompilationCallback();
62 uint64_t resolveFunctionReference(uint64_t RetAddr);
66 JITResolver *TheJITResolver;
69 /// addFunctionReference - This method is called when we need to emit the
70 /// address of a function that has not yet been emitted, so we don't know the
71 /// address. Instead, we emit a call to the CompilationCallback method, and
72 /// keep track of where we are.
74 uint64_t JITResolver::addFunctionReference(uint64_t Address, Function *F) {
75 LazyCodeGenMap[Address] = F;
76 return (intptr_t)&JITResolver::CompilationCallback;
79 uint64_t JITResolver::resolveFunctionReference(uint64_t RetAddr) {
80 std::map<uint64_t, Function*>::iterator I = LazyCodeGenMap.find(RetAddr);
81 assert(I != LazyCodeGenMap.end() && "Not in map!");
82 Function *F = I->second;
83 LazyCodeGenMap.erase(I);
84 return MCE.forceCompilationOf(F);
87 uint64_t JITResolver::getLazyResolver(Function *F) {
88 std::map<Function*, uint64_t>::iterator I = LazyResolverMap.lower_bound(F);
89 if (I != LazyResolverMap.end() && I->first == F) return I->second;
91 //std::cerr << "Getting lazy resolver for : " << ((Value*)F)->getName() << "\n";
93 uint64_t Stub = emitStubForFunction(F);
94 LazyResolverMap.insert(I, std::make_pair(F, Stub));
98 uint64_t JITResolver::insertFarJumpAtAddr(int64_t Target, uint64_t Addr) {
100 static const unsigned i1 = SparcIntRegClass::i1, i2 = SparcIntRegClass::i2,
101 i7 = SparcIntRegClass::i7,
102 o6 = SparcIntRegClass::o6, g0 = SparcIntRegClass::g0;
105 // Save %i1, %i2 to the stack so we can form a 64-bit constant in %i2
108 // stx %i1, [%sp + 2119] ;; save %i1 to the stack, used as temp
109 MachineInstr *STX = BuildMI(V9::STXi, 3).addReg(i1).addReg(o6).addSImm(2119);
110 *((unsigned*)(intptr_t)Addr) = getBinaryCodeForInstr(*STX);
114 // stx %i2, [%sp + 2127] ;; save %i2 to the stack
115 STX = BuildMI(V9::STXi, 3).addReg(i2).addReg(o6).addSImm(2127);
116 *((unsigned*)(intptr_t)Addr) = getBinaryCodeForInstr(*STX);
121 // Get address to branch into %i2, using %i1 as a temporary
124 // sethi %uhi(Target), %i1 ;; get upper 22 bits of Target into %i1
125 MachineInstr *SH = BuildMI(V9::SETHI, 2).addSImm(Target >> 42).addReg(i1);
126 *((unsigned*)(intptr_t)Addr) = getBinaryCodeForInstr(*SH);
130 // or %i1, %ulo(Target), %i1 ;; get 10 lower bits of upper word into %1
131 MachineInstr *OR = BuildMI(V9::ORi, 3)
132 .addReg(i1).addSImm((Target >> 32) & 0x03ff).addReg(i1);
133 *((unsigned*)(intptr_t)Addr) = getBinaryCodeForInstr(*OR);
137 // sllx %i1, 32, %i1 ;; shift those 10 bits to the upper word
138 MachineInstr *SL = BuildMI(V9::SLLXi6, 3).addReg(i1).addSImm(32).addReg(i1);
139 *((unsigned*)(intptr_t)Addr) = getBinaryCodeForInstr(*SL);
143 // sethi %hi(Target), %i2 ;; extract bits 10-31 into the dest reg
144 SH = BuildMI(V9::SETHI, 2).addSImm((Target >> 10) & 0x03fffff).addReg(i2);
145 *((unsigned*)(intptr_t)Addr) = getBinaryCodeForInstr(*SH);
149 // or %i1, %i2, %i2 ;; get upper word (in %i1) into %i2
150 OR = BuildMI(V9::ORr, 3).addReg(i1).addReg(i2).addReg(i2);
151 *((unsigned*)(intptr_t)Addr) = getBinaryCodeForInstr(*OR);
155 // or %i2, %lo(Target), %i2 ;; get lowest 10 bits of Target into %i2
156 OR = BuildMI(V9::ORi, 3).addReg(i2).addSImm(Target & 0x03ff).addReg(i2);
157 *((unsigned*)(intptr_t)Addr) = getBinaryCodeForInstr(*OR);
161 // ldx [%sp + 2119], %i1 ;; restore %i1 -> 2119 = BIAS(2047) + 72
162 MachineInstr *LDX = BuildMI(V9::LDXi, 3).addReg(o6).addSImm(2119).addReg(i1);
163 *((unsigned*)(intptr_t)Addr) = getBinaryCodeForInstr(*LDX);
167 // jmpl %i2, %g0, %g0 ;; indirect branch on %i2
168 MachineInstr *J = BuildMI(V9::JMPLRETr, 3).addReg(i2).addReg(g0).addReg(g0);
169 *((unsigned*)(intptr_t)Addr) = getBinaryCodeForInstr(*J);
173 // ldx [%sp + 2127], %i2 ;; restore %i2 -> 2127 = BIAS(2047) + 80
174 LDX = BuildMI(V9::LDXi, 3).addReg(o6).addSImm(2127).addReg(i2);
175 *((unsigned*)(intptr_t)Addr) = getBinaryCodeForInstr(*LDX);
182 void JITResolver::CompilationCallback() {
183 uint64_t CameFrom = (uint64_t)(intptr_t)__builtin_return_address(0);
184 int64_t Target = (int64_t)TheJITResolver->resolveFunctionReference(CameFrom);
185 DEBUG(std::cerr << "In callback! Addr=0x" << std::hex << CameFrom << "\n");
187 // Rewrite the call target... so that we don't fault every time we execute
190 int64_t RealCallTarget = (int64_t)
191 ((NewVal - TheJITResolver->getCurrentPCValue()) >> 4);
192 if (RealCallTarget >= (1<<22) || RealCallTarget <= -(1<<22)) {
193 std::cerr << "Address out of bounds for 22bit BA: " << RealCallTarget<<"\n";
198 //uint64_t CurrPC = TheJITResolver->getCurrentPCValue();
199 // we will insert 9 instructions before we do the actual jump
200 //int64_t NewTarget = (NewVal - 9*4 - InstAddr) >> 2;
202 static const unsigned i1 = SparcIntRegClass::i1, i2 = SparcIntRegClass::i2,
203 i7 = SparcIntRegClass::i7, o6 = SparcIntRegClass::o6,
204 o7 = SparcIntRegClass::o7, g0 = SparcIntRegClass::g0;
206 // Subtract 4 to overwrite the 'save' that's there now
207 uint64_t InstAddr = CameFrom-4;
209 InstAddr = TheJITResolver->insertFarJumpAtAddr(Target, InstAddr);
211 // CODE SHOULD NEVER GO PAST THIS LOAD!! The real function should return to
212 // the original caller, not here!!
214 // FIXME: add call 0 to make sure?!?
216 // =============== THE REAL STUB ENDS HERE =========================
218 // What follows below is one-time restore code, because this callback may be
219 // changing registers in unpredictible ways. However, since it is executed
220 // only once per function (after the function is resolved, the callback is no
221 // longer in the path), this has to be done only once.
223 // Thus, it is after the regular stub code. The call back returns to THIS
224 // point, but every other call to the target function will execute the code
225 // above. Hence, this code is one-time use.
227 uint64_t OneTimeRestore = InstAddr;
229 // restore %g0, 0, %g0
230 //MachineInstr *R = BuildMI(V9::RESTOREi, 3).addMReg(g0).addSImm(0)
231 // .addMReg(g0, MOTy::Def);
232 //*((unsigned*)(intptr_t)InstAddr)=TheJITResolver->getBinaryCodeForInstr(*R);
235 // FIXME: BuildMI() above crashes. Encode the instruction directly.
236 // restore %g0, 0, %g0
237 *((unsigned*)(intptr_t)InstAddr) = 0x81e82000U;
240 InstAddr = TheJITResolver->insertFarJumpAtAddr(Target, InstAddr);
242 // FIXME: if the target function is close enough to fit into the 19bit disp of
243 // BA, we should use this version, as its much cheaper to generate.
245 MachineInstr *MI = BuildMI(V9::BA, 1).addSImm(RealCallTarget);
246 *((unsigned*)(intptr_t)InstAddr) = TheJITResolver->getBinaryCodeForInstr(*MI);
251 MachineInstr *Nop = BuildMI(V9::NOP, 0);
252 *((unsigned*)(intptr_t)InstAddr)=TheJITResolver->getBinaryCodeForInstr(*Nop);
256 MachineInstr *BA = BuildMI(V9::BA, 1).addSImm(RealCallTarget-2);
257 *((unsigned*)(intptr_t)InstAddr) = TheJITResolver->getBinaryCodeForInstr(*BA);
261 // Change the return address to reexecute the call instruction...
262 // The return address is really %o7, but will disappear after this function
263 // returns, and the register windows are rotated away.
264 #if defined(sparc) || defined(__sparc__) || defined(__sparcv9)
265 __asm__ __volatile__ ("or %%g0, %0, %%i7" : : "r" (OneTimeRestore-8));
269 /// emitStubForFunction - This method is used by the JIT when it needs to emit
270 /// the address of a function for a function whose code has not yet been
271 /// generated. In order to do this, it generates a stub which jumps to the lazy
272 /// function compiler, which will eventually get fixed to call the function
275 uint64_t JITResolver::emitStubForFunction(Function *F) {
276 MCE.startFunctionStub(*F, 6);
278 DEBUG(std::cerr << "Emitting stub at addr: 0x"
279 << std::hex << MCE.getCurrentPCValue() << "\n");
281 unsigned o6 = SparcIntRegClass::o6;
282 // save %sp, -192, %sp
283 MachineInstr *SV = BuildMI(V9::SAVEi, 3).addReg(o6).addSImm(-192).addReg(o6);
284 SparcV9.emitWord(SparcV9.getBinaryCodeForInstr(*SV));
287 int64_t CurrPC = MCE.getCurrentPCValue();
288 int64_t Addr = (int64_t)addFunctionReference(CurrPC, F);
290 int64_t CallTarget = (Addr-CurrPC) >> 2;
291 if (CallTarget >= (1 << 30) || CallTarget <= -(1 << 30)) {
292 std::cerr << "Call target beyond 30 bit limit of CALL: "
293 << CallTarget << "\n";
296 // call CallTarget ;; invoke the callback
297 MachineInstr *Call = BuildMI(V9::CALL, 1).addSImm(CallTarget);
298 SparcV9.emitWord(SparcV9.getBinaryCodeForInstr(*Call));
301 // nop ;; call delay slot
302 MachineInstr *Nop = BuildMI(V9::NOP, 0);
303 SparcV9.emitWord(SparcV9.getBinaryCodeForInstr(*Nop));
306 SparcV9.emitWord(0xDEADBEEF); // marker so that we know it's really a stub
307 return (intptr_t)MCE.finishFunctionStub(*F);
311 SparcV9CodeEmitter::SparcV9CodeEmitter(TargetMachine &tm,
312 MachineCodeEmitter &M): TM(tm), MCE(M)
314 TheJITResolver = new JITResolver(*this, M);
317 SparcV9CodeEmitter::~SparcV9CodeEmitter() {
318 delete TheJITResolver;
321 void SparcV9CodeEmitter::emitWord(unsigned Val) {
322 // Output the constant in big endian byte order...
324 for (int i = 3; i >= 0; --i) {
325 byteVal = Val >> 8*i;
326 MCE.emitByte(byteVal & 255);
330 bool SparcV9CodeEmitter::isFPInstr(MachineInstr &MI) {
331 for (unsigned i = 0, e = MI.getNumOperands(); i < e; ++i) {
332 const MachineOperand &MO = MI.getOperand(i);
333 if (MO.isPhysicalRegister()) {
334 unsigned fakeReg = MO.getReg(), realReg, regClass, regType;
335 regType = TM.getRegInfo().getRegType(fakeReg);
336 // At least map fakeReg into its class
337 fakeReg = TM.getRegInfo().getClassRegNum(fakeReg, regClass);
338 if (regClass == UltraSparcRegInfo::FPSingleRegType ||
339 regClass == UltraSparcRegInfo::FPDoubleRegType)
347 SparcV9CodeEmitter::getRealRegNum(unsigned fakeReg, unsigned regClass,
350 case UltraSparcRegInfo::IntRegType: {
352 static const unsigned IntRegMap[] = {
353 // "o0", "o1", "o2", "o3", "o4", "o5", "o7",
354 8, 9, 10, 11, 12, 13, 15,
355 // "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
356 16, 17, 18, 19, 20, 21, 22, 23,
357 // "i0", "i1", "i2", "i3", "i4", "i5",
358 24, 25, 26, 27, 28, 29,
361 // "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
362 0, 1, 2, 3, 4, 5, 6, 7,
367 return IntRegMap[fakeReg];
370 case UltraSparcRegInfo::FPSingleRegType: {
373 case UltraSparcRegInfo::FPDoubleRegType: {
376 case UltraSparcRegInfo::FloatCCRegType: {
377 /* These are laid out %fcc0 - %fcc3 => 0 - 3, so are correct */
381 case UltraSparcRegInfo::IntCCRegType: {
382 static const unsigned FPInstrIntCCReg[] = { 6 /* xcc */, 4 /* icc */ };
383 static const unsigned IntInstrIntCCReg[] = { 2 /* xcc */, 0 /* icc */ };
386 assert(fakeReg < sizeof(FPInstrIntCCReg)/sizeof(FPInstrIntCCReg[0])
387 && "Int CC register out of bounds for FPInstr IntCCReg map");
388 return FPInstrIntCCReg[fakeReg];
390 assert(fakeReg < sizeof(IntInstrIntCCReg)/sizeof(IntInstrIntCCReg[0])
391 && "Int CC register out of bounds for IntInstr IntCCReg map");
392 return IntInstrIntCCReg[fakeReg];
396 assert(0 && "Invalid unified register number in getRegType");
401 int64_t SparcV9CodeEmitter::getMachineOpValue(MachineInstr &MI,
402 MachineOperand &MO) {
403 int64_t rv = 0; // Return value; defaults to 0 for unhandled cases
404 // or things that get fixed up later by the JIT.
406 if (MO.isVirtualRegister()) {
407 DEBUG(std::cerr << "ERROR: virtual register found in machine code.\n");
409 } else if (MO.isPCRelativeDisp()) {
410 DEBUG(std::cerr << "PCRelativeDisp: ");
411 Value *V = MO.getVRegValue();
412 if (BasicBlock *BB = dyn_cast<BasicBlock>(V)) {
413 DEBUG(std::cerr << "Saving reference to BB (VReg)\n");
414 unsigned* CurrPC = (unsigned*)(intptr_t)MCE.getCurrentPCValue();
415 BBRefs.push_back(std::make_pair(BB, std::make_pair(CurrPC, &MI)));
416 } else if (const Constant *C = dyn_cast<Constant>(V)) {
417 if (ConstantMap.find(C) != ConstantMap.end()) {
418 rv = (int64_t)MCE.getConstantPoolEntryAddress(ConstantMap[C]);
419 DEBUG(std::cerr << "const: 0x" << std::hex << rv << "\n");
421 DEBUG(std::cerr << "ERROR: constant not in map:" << MO << "\n");
424 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
425 // same as MO.isGlobalAddress()
426 DEBUG(std::cerr << "GlobalValue: ");
427 // external function calls, etc.?
428 if (Function *F = dyn_cast<Function>(GV)) {
429 DEBUG(std::cerr << "Function: ");
430 if (F->isExternal()) {
431 // Sparc backend broken: this MO should be `ExternalSymbol'
432 rv = (int64_t)MCE.getGlobalValueAddress(F->getName());
434 rv = (int64_t)MCE.getGlobalValueAddress(F);
437 DEBUG(std::cerr << "not yet generated\n");
438 // Function has not yet been code generated!
439 TheJITResolver->addFunctionReference(MCE.getCurrentPCValue(), F);
440 // Delayed resolution...
441 rv = TheJITResolver->getLazyResolver(F);
443 DEBUG(std::cerr << "already generated: 0x" << std::hex << rv << "\n");
446 DEBUG(std::cerr << "not a function: " << *GV << "\n");
449 // The real target of the call is Addr = PC + (rv * 4)
450 // So undo that: give the instruction (Addr - PC) / 4
451 if (MI.getOpcode() == V9::CALL) {
452 int64_t CurrPC = MCE.getCurrentPCValue();
453 DEBUG(std::cerr << "rv addr: 0x" << std::hex << rv << "\n"
454 << "curr PC: 0x" << CurrPC << "\n");
455 rv = (rv - CurrPC) >> 2;
456 if (rv >= (1<<29) || rv <= -(1<<29)) {
457 std::cerr << "addr out of bounds for the 30-bit call: " << rv << "\n";
460 DEBUG(std::cerr << "returning addr: 0x" << rv << "\n");
463 std::cerr << "ERROR: PC relative disp unhandled:" << MO << "\n";
466 } else if (MO.isPhysicalRegister() ||
467 MO.getType() == MachineOperand::MO_CCRegister)
469 // This is necessary because the Sparc doesn't actually lay out registers
470 // in the real fashion -- it skips those that it chooses not to allocate,
471 // i.e. those that are the SP, etc.
472 unsigned fakeReg = MO.getReg(), realReg, regClass, regType;
473 regType = TM.getRegInfo().getRegType(fakeReg);
474 // At least map fakeReg into its class
475 fakeReg = TM.getRegInfo().getClassRegNum(fakeReg, regClass);
476 // Find the real register number for use in an instruction
477 /////realReg = getRealRegNum(fakeReg, regClass, MI);
478 realReg = getRealRegNum(fakeReg, regType, MI);
479 DEBUG(std::cerr << MO << ": Reg[" << std::dec << fakeReg << "] = "
482 } else if (MO.isImmediate()) {
483 rv = MO.getImmedValue();
484 DEBUG(std::cerr << "immed: " << rv << "\n");
485 } else if (MO.isGlobalAddress()) {
486 DEBUG(std::cerr << "GlobalAddress: not PC-relative\n");
488 (intptr_t)getGlobalAddress(cast<GlobalValue>(MO.getVRegValue()),
489 MI, MO.isPCRelative());
490 } else if (MO.isMachineBasicBlock()) {
491 // Duplicate code of the above case for VirtualRegister, BasicBlock...
492 // It should really hit this case, but Sparc backend uses VRegs instead
493 DEBUG(std::cerr << "Saving reference to MBB\n");
494 BasicBlock *BB = MO.getMachineBasicBlock()->getBasicBlock();
495 unsigned* CurrPC = (unsigned*)(intptr_t)MCE.getCurrentPCValue();
496 BBRefs.push_back(std::make_pair(BB, std::make_pair(CurrPC, &MI)));
497 } else if (MO.isExternalSymbol()) {
498 // Sparc backend doesn't generate this (yet...)
499 std::cerr << "ERROR: External symbol unhandled: " << MO << "\n";
501 } else if (MO.isFrameIndex()) {
502 // Sparc backend doesn't generate this (yet...)
503 int FrameIndex = MO.getFrameIndex();
504 std::cerr << "ERROR: Frame index unhandled.\n";
506 } else if (MO.isConstantPoolIndex()) {
507 // Sparc backend doesn't generate this (yet...)
508 std::cerr << "ERROR: Constant Pool index unhandled.\n";
511 std::cerr << "ERROR: Unknown type of MachineOperand: " << MO << "\n";
515 // Finally, deal with the various bitfield-extracting functions that
516 // are used in SPARC assembly. (Some of these make no sense in combination
517 // with some of the above; we'll trust that the instruction selector
518 // will not produce nonsense, and not check for valid combinations here.)
519 if (MO.opLoBits32()) { // %lo(val) == %lo() in Sparc ABI doc
521 } else if (MO.opHiBits32()) { // %lm(val) == %hi() in Sparc ABI doc
522 return (rv >> 10) & 0x03fffff;
523 } else if (MO.opLoBits64()) { // %hm(val) == %ulo() in Sparc ABI doc
524 return (rv >> 32) & 0x03ff;
525 } else if (MO.opHiBits64()) { // %hh(val) == %uhi() in Sparc ABI doc
527 } else { // (unadorned) val
532 unsigned SparcV9CodeEmitter::getValueBit(int64_t Val, unsigned bit) {
537 bool SparcV9CodeEmitter::runOnMachineFunction(MachineFunction &MF) {
538 MCE.startFunction(MF);
539 DEBUG(std::cerr << "Starting function " << MF.getFunction()->getName()
540 << ", address: " << "0x" << std::hex
541 << (long)MCE.getCurrentPCValue() << "\n");
543 // The Sparc backend does not use MachineConstantPool;
544 // instead, it has its own constant pool implementation.
545 // We create a new MachineConstantPool here to be compatible with the emitter.
546 MachineConstantPool MCP;
547 const hash_set<const Constant*> &pool = MF.getInfo()->getConstantPoolValues();
548 for (hash_set<const Constant*>::const_iterator I = pool.begin(),
549 E = pool.end(); I != E; ++I)
551 Constant *C = (Constant*)*I;
552 unsigned idx = MCP.getConstantPoolIndex(C);
553 DEBUG(std::cerr << "Mapping constant 0x" << (intptr_t)C << " to "
555 ConstantMap[C] = idx;
557 MCE.emitConstantPool(&MCP);
559 for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I)
561 MCE.finishFunction(MF);
563 DEBUG(std::cerr << "Finishing function " << MF.getFunction()->getName()
566 for (unsigned i = 0, e = BBRefs.size(); i != e; ++i) {
567 long Location = BBLocations[BBRefs[i].first];
568 unsigned *Ref = BBRefs[i].second.first;
569 MachineInstr *MI = BBRefs[i].second.second;
570 DEBUG(std::cerr << "Fixup @" << std::hex << Ref << " to " << Location
571 << " in instr: " << std::dec << *MI << "\n");
574 // Resolve branches to BasicBlocks for the entire function
575 for (unsigned i = 0, e = BBRefs.size(); i != e; ++i) {
576 long Location = BBLocations[BBRefs[i].first];
577 unsigned *Ref = BBRefs[i].second.first;
578 MachineInstr *MI = BBRefs[i].second.second;
579 DEBUG(std::cerr << "attempting to resolve BB: " << i << "\n");
580 for (unsigned ii = 0, ee = MI->getNumOperands(); ii != ee; ++ii) {
581 MachineOperand &op = MI->getOperand(ii);
582 if (op.isPCRelativeDisp()) {
583 // the instruction's branch target is made such that it branches to
584 // PC + (br target * 4), so undo that arithmetic here:
585 // Location is the target of the branch
586 // Ref is the location of the instruction, and hence the PC
587 unsigned branchTarget = (Location - (long)Ref) >> 2;
589 bool loBits32=false, hiBits32=false, loBits64=false, hiBits64=false;
590 if (op.opLoBits32()) { loBits32=true; }
591 if (op.opHiBits32()) { hiBits32=true; }
592 if (op.opLoBits64()) { loBits64=true; }
593 if (op.opHiBits64()) { hiBits64=true; }
594 MI->SetMachineOperandConst(ii, MachineOperand::MO_SignExtendedImmed,
596 if (loBits32) { MI->setOperandLo32(ii); }
597 else if (hiBits32) { MI->setOperandHi32(ii); }
598 else if (loBits64) { MI->setOperandLo64(ii); }
599 else if (hiBits64) { MI->setOperandHi64(ii); }
600 DEBUG(std::cerr << "Rewrote BB ref: ");
601 unsigned fixedInstr = SparcV9CodeEmitter::getBinaryCodeForInstr(*MI);
613 void SparcV9CodeEmitter::emitBasicBlock(MachineBasicBlock &MBB) {
614 currBB = MBB.getBasicBlock();
615 BBLocations[currBB] = MCE.getCurrentPCValue();
616 for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end(); I != E; ++I)
617 emitWord(getBinaryCodeForInstr(**I));
620 void* SparcV9CodeEmitter::getGlobalAddress(GlobalValue *V, MachineInstr &MI,
623 if (isPCRelative) { // must be a call, this is a major hack!
624 // Try looking up the function to see if it is already compiled!
625 if (void *Addr = (void*)(intptr_t)MCE.getGlobalValueAddress(V)) {
626 intptr_t CurByte = MCE.getCurrentPCValue();
627 // The real target of the call is Addr = PC + (target * 4)
628 // CurByte is the PC, Addr we just received
629 return (void*) (((long)Addr - (long)CurByte) >> 2);
631 if (Function *F = dyn_cast<Function>(V)) {
632 // Function has not yet been code generated!
633 TheJITResolver->addFunctionReference(MCE.getCurrentPCValue(),
635 // Delayed resolution...
637 (void*)(intptr_t)TheJITResolver->getLazyResolver(cast<Function>(V));
639 } else if (Constant *C = ConstantPointerRef::get(V)) {
640 if (ConstantMap.find(C) != ConstantMap.end()) {
642 (intptr_t)MCE.getConstantPoolEntryAddress(ConstantMap[C]);
644 std::cerr << "Constant: 0x" << std::hex << &*C << std::dec
645 << ", " << *V << " not found in ConstantMap!\n";
649 std::cerr << "Unhandled global: " << *V << "\n";
654 return (void*)(intptr_t)MCE.getGlobalValueAddress(V);
659 #include "SparcV9CodeEmitter.inc"