1 //===-- SystemZISelLowering.cpp - SystemZ DAG lowering implementation -----===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the SystemZTargetLowering class.
12 //===----------------------------------------------------------------------===//
14 #define DEBUG_TYPE "systemz-lower"
16 #include "SystemZISelLowering.h"
17 #include "SystemZCallingConv.h"
18 #include "SystemZConstantPoolValue.h"
19 #include "SystemZMachineFunctionInfo.h"
20 #include "SystemZTargetMachine.h"
21 #include "llvm/CodeGen/CallingConvLower.h"
22 #include "llvm/CodeGen/MachineInstrBuilder.h"
23 #include "llvm/CodeGen/MachineRegisterInfo.h"
24 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
28 // Classify VT as either 32 or 64 bit.
29 static bool is32Bit(EVT VT) {
30 switch (VT.getSimpleVT().SimpleTy) {
36 llvm_unreachable("Unsupported type");
40 // Return a version of MachineOperand that can be safely used before the
42 static MachineOperand earlyUseOperand(MachineOperand Op) {
48 SystemZTargetLowering::SystemZTargetLowering(SystemZTargetMachine &tm)
49 : TargetLowering(tm, new TargetLoweringObjectFileELF()),
50 Subtarget(*tm.getSubtargetImpl()), TM(tm) {
51 MVT PtrVT = getPointerTy();
53 // Set up the register classes.
54 addRegisterClass(MVT::i32, &SystemZ::GR32BitRegClass);
55 addRegisterClass(MVT::i64, &SystemZ::GR64BitRegClass);
56 addRegisterClass(MVT::f32, &SystemZ::FP32BitRegClass);
57 addRegisterClass(MVT::f64, &SystemZ::FP64BitRegClass);
58 addRegisterClass(MVT::f128, &SystemZ::FP128BitRegClass);
60 // Compute derived properties from the register classes
61 computeRegisterProperties();
63 // Set up special registers.
64 setExceptionPointerRegister(SystemZ::R6D);
65 setExceptionSelectorRegister(SystemZ::R7D);
66 setStackPointerRegisterToSaveRestore(SystemZ::R15D);
68 // TODO: It may be better to default to latency-oriented scheduling, however
69 // LLVM's current latency-oriented scheduler can't handle physreg definitions
70 // such as SystemZ has with CC, so set this to the register-pressure
71 // scheduler, because it can.
72 setSchedulingPreference(Sched::RegPressure);
74 setBooleanContents(ZeroOrOneBooleanContent);
75 setBooleanVectorContents(ZeroOrOneBooleanContent); // FIXME: Is this correct?
77 // Instructions are strings of 2-byte aligned 2-byte values.
78 setMinFunctionAlignment(2);
80 // Handle operations that are handled in a similar way for all types.
81 for (unsigned I = MVT::FIRST_INTEGER_VALUETYPE;
82 I <= MVT::LAST_FP_VALUETYPE;
84 MVT VT = MVT::SimpleValueType(I);
85 if (isTypeLegal(VT)) {
86 // Expand SETCC(X, Y, COND) into SELECT_CC(X, Y, 1, 0, COND).
87 setOperationAction(ISD::SETCC, VT, Expand);
89 // Expand SELECT(C, A, B) into SELECT_CC(X, 0, A, B, NE).
90 setOperationAction(ISD::SELECT, VT, Expand);
92 // Lower SELECT_CC and BR_CC into separate comparisons and branches.
93 setOperationAction(ISD::SELECT_CC, VT, Custom);
94 setOperationAction(ISD::BR_CC, VT, Custom);
98 // Expand jump table branches as address arithmetic followed by an
100 setOperationAction(ISD::BR_JT, MVT::Other, Expand);
102 // Expand BRCOND into a BR_CC (see above).
103 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
105 // Handle integer types.
106 for (unsigned I = MVT::FIRST_INTEGER_VALUETYPE;
107 I <= MVT::LAST_INTEGER_VALUETYPE;
109 MVT VT = MVT::SimpleValueType(I);
110 if (isTypeLegal(VT)) {
111 // Expand individual DIV and REMs into DIVREMs.
112 setOperationAction(ISD::SDIV, VT, Expand);
113 setOperationAction(ISD::UDIV, VT, Expand);
114 setOperationAction(ISD::SREM, VT, Expand);
115 setOperationAction(ISD::UREM, VT, Expand);
116 setOperationAction(ISD::SDIVREM, VT, Custom);
117 setOperationAction(ISD::UDIVREM, VT, Custom);
119 // Expand ATOMIC_LOAD and ATOMIC_STORE using ATOMIC_CMP_SWAP.
120 // FIXME: probably much too conservative.
121 setOperationAction(ISD::ATOMIC_LOAD, VT, Expand);
122 setOperationAction(ISD::ATOMIC_STORE, VT, Expand);
124 // No special instructions for these.
125 setOperationAction(ISD::CTPOP, VT, Expand);
126 setOperationAction(ISD::CTTZ, VT, Expand);
127 setOperationAction(ISD::CTTZ_ZERO_UNDEF, VT, Expand);
128 setOperationAction(ISD::CTLZ_ZERO_UNDEF, VT, Expand);
129 setOperationAction(ISD::ROTR, VT, Expand);
131 // Use *MUL_LOHI where possible and a wider multiplication otherwise.
132 setOperationAction(ISD::MULHS, VT, Expand);
133 setOperationAction(ISD::MULHU, VT, Expand);
135 // We have instructions for signed but not unsigned FP conversion.
136 setOperationAction(ISD::FP_TO_UINT, VT, Expand);
140 // Type legalization will convert 8- and 16-bit atomic operations into
141 // forms that operate on i32s (but still keeping the original memory VT).
142 // Lower them into full i32 operations.
143 setOperationAction(ISD::ATOMIC_SWAP, MVT::i32, Custom);
144 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i32, Custom);
145 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i32, Custom);
146 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i32, Custom);
147 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i32, Custom);
148 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i32, Custom);
149 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i32, Custom);
150 setOperationAction(ISD::ATOMIC_LOAD_MIN, MVT::i32, Custom);
151 setOperationAction(ISD::ATOMIC_LOAD_MAX, MVT::i32, Custom);
152 setOperationAction(ISD::ATOMIC_LOAD_UMIN, MVT::i32, Custom);
153 setOperationAction(ISD::ATOMIC_LOAD_UMAX, MVT::i32, Custom);
154 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i32, Custom);
156 // We have instructions for signed but not unsigned FP conversion.
157 // Handle unsigned 32-bit types as signed 64-bit types.
158 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Promote);
159 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
161 // We have native support for a 64-bit CTLZ, via FLOGR.
162 setOperationAction(ISD::CTLZ, MVT::i32, Promote);
163 setOperationAction(ISD::CTLZ, MVT::i64, Legal);
165 // Give LowerOperation the chance to replace 64-bit ORs with subregs.
166 setOperationAction(ISD::OR, MVT::i64, Custom);
168 // The architecture has 32-bit SMUL_LOHI and UMUL_LOHI (MR and MLR),
169 // but they aren't really worth using. There is no 64-bit SMUL_LOHI,
170 // but there is a 64-bit UMUL_LOHI: MLGR.
171 setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
172 setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand);
173 setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
174 setOperationAction(ISD::UMUL_LOHI, MVT::i64, Custom);
176 // FIXME: Can we support these natively?
177 setOperationAction(ISD::SRL_PARTS, MVT::i64, Expand);
178 setOperationAction(ISD::SHL_PARTS, MVT::i64, Expand);
179 setOperationAction(ISD::SRA_PARTS, MVT::i64, Expand);
181 // We have native instructions for i8, i16 and i32 extensions, but not i1.
182 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
183 setLoadExtAction(ISD::ZEXTLOAD, MVT::i1, Promote);
184 setLoadExtAction(ISD::EXTLOAD, MVT::i1, Promote);
185 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
187 // Handle the various types of symbolic address.
188 setOperationAction(ISD::ConstantPool, PtrVT, Custom);
189 setOperationAction(ISD::GlobalAddress, PtrVT, Custom);
190 setOperationAction(ISD::GlobalTLSAddress, PtrVT, Custom);
191 setOperationAction(ISD::BlockAddress, PtrVT, Custom);
192 setOperationAction(ISD::JumpTable, PtrVT, Custom);
194 // We need to handle dynamic allocations specially because of the
195 // 160-byte area at the bottom of the stack.
196 setOperationAction(ISD::DYNAMIC_STACKALLOC, PtrVT, Custom);
198 // Use custom expanders so that we can force the function to use
200 setOperationAction(ISD::STACKSAVE, MVT::Other, Custom);
201 setOperationAction(ISD::STACKRESTORE, MVT::Other, Custom);
203 // Expand these using getExceptionSelectorRegister() and
204 // getExceptionPointerRegister().
205 setOperationAction(ISD::EXCEPTIONADDR, PtrVT, Expand);
206 setOperationAction(ISD::EHSELECTION, PtrVT, Expand);
208 // Handle floating-point types.
209 for (unsigned I = MVT::FIRST_FP_VALUETYPE;
210 I <= MVT::LAST_FP_VALUETYPE;
212 MVT VT = MVT::SimpleValueType(I);
213 if (isTypeLegal(VT)) {
214 // We can use FI for FRINT.
215 setOperationAction(ISD::FRINT, VT, Legal);
217 // No special instructions for these.
218 setOperationAction(ISD::FSIN, VT, Expand);
219 setOperationAction(ISD::FCOS, VT, Expand);
220 setOperationAction(ISD::FREM, VT, Expand);
224 // We have fused multiply-addition for f32 and f64 but not f128.
225 setOperationAction(ISD::FMA, MVT::f32, Legal);
226 setOperationAction(ISD::FMA, MVT::f64, Legal);
227 setOperationAction(ISD::FMA, MVT::f128, Expand);
229 // Needed so that we don't try to implement f128 constant loads using
230 // a load-and-extend of a f80 constant (in cases where the constant
231 // would fit in an f80).
232 setLoadExtAction(ISD::EXTLOAD, MVT::f80, Expand);
234 // Floating-point truncation and stores need to be done separately.
235 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
236 setTruncStoreAction(MVT::f128, MVT::f32, Expand);
237 setTruncStoreAction(MVT::f128, MVT::f64, Expand);
239 // We have 64-bit FPR<->GPR moves, but need special handling for
241 setOperationAction(ISD::BITCAST, MVT::i32, Custom);
242 setOperationAction(ISD::BITCAST, MVT::f32, Custom);
244 // VASTART and VACOPY need to deal with the SystemZ-specific varargs
245 // structure, but VAEND is a no-op.
246 setOperationAction(ISD::VASTART, MVT::Other, Custom);
247 setOperationAction(ISD::VACOPY, MVT::Other, Custom);
248 setOperationAction(ISD::VAEND, MVT::Other, Expand);
251 bool SystemZTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
252 // We can load zero using LZ?R and negative zero using LZ?R;LC?BR.
253 return Imm.isZero() || Imm.isNegZero();
256 bool SystemZTargetLowering::allowsUnalignedMemoryAccesses(EVT VT,
258 // Unaligned accesses should never be slower than the expanded version.
259 // We check specifically for aligned accesses in the few cases where
260 // they are required.
266 //===----------------------------------------------------------------------===//
267 // Inline asm support
268 //===----------------------------------------------------------------------===//
270 TargetLowering::ConstraintType
271 SystemZTargetLowering::getConstraintType(const std::string &Constraint) const {
272 if (Constraint.size() == 1) {
273 switch (Constraint[0]) {
274 case 'a': // Address register
275 case 'd': // Data register (equivalent to 'r')
276 case 'f': // Floating-point register
277 case 'r': // General-purpose register
278 return C_RegisterClass;
280 case 'Q': // Memory with base and unsigned 12-bit displacement
281 case 'R': // Likewise, plus an index
282 case 'S': // Memory with base and signed 20-bit displacement
283 case 'T': // Likewise, plus an index
284 case 'm': // Equivalent to 'T'.
287 case 'I': // Unsigned 8-bit constant
288 case 'J': // Unsigned 12-bit constant
289 case 'K': // Signed 16-bit constant
290 case 'L': // Signed 20-bit displacement (on all targets we support)
291 case 'M': // 0x7fffffff
298 return TargetLowering::getConstraintType(Constraint);
301 TargetLowering::ConstraintWeight SystemZTargetLowering::
302 getSingleConstraintMatchWeight(AsmOperandInfo &info,
303 const char *constraint) const {
304 ConstraintWeight weight = CW_Invalid;
305 Value *CallOperandVal = info.CallOperandVal;
306 // If we don't have a value, we can't do a match,
307 // but allow it at the lowest weight.
308 if (CallOperandVal == NULL)
310 Type *type = CallOperandVal->getType();
311 // Look at the constraint type.
312 switch (*constraint) {
314 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
317 case 'a': // Address register
318 case 'd': // Data register (equivalent to 'r')
319 case 'r': // General-purpose register
320 if (CallOperandVal->getType()->isIntegerTy())
321 weight = CW_Register;
324 case 'f': // Floating-point register
325 if (type->isFloatingPointTy())
326 weight = CW_Register;
329 case 'I': // Unsigned 8-bit constant
330 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal))
331 if (isUInt<8>(C->getZExtValue()))
332 weight = CW_Constant;
335 case 'J': // Unsigned 12-bit constant
336 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal))
337 if (isUInt<12>(C->getZExtValue()))
338 weight = CW_Constant;
341 case 'K': // Signed 16-bit constant
342 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal))
343 if (isInt<16>(C->getSExtValue()))
344 weight = CW_Constant;
347 case 'L': // Signed 20-bit displacement (on all targets we support)
348 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal))
349 if (isInt<20>(C->getSExtValue()))
350 weight = CW_Constant;
353 case 'M': // 0x7fffffff
354 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal))
355 if (C->getZExtValue() == 0x7fffffff)
356 weight = CW_Constant;
362 std::pair<unsigned, const TargetRegisterClass *> SystemZTargetLowering::
363 getRegForInlineAsmConstraint(const std::string &Constraint, MVT VT) const {
364 if (Constraint.size() == 1) {
365 // GCC Constraint Letters
366 switch (Constraint[0]) {
368 case 'd': // Data register (equivalent to 'r')
369 case 'r': // General-purpose register
371 return std::make_pair(0U, &SystemZ::GR64BitRegClass);
372 else if (VT == MVT::i128)
373 return std::make_pair(0U, &SystemZ::GR128BitRegClass);
374 return std::make_pair(0U, &SystemZ::GR32BitRegClass);
376 case 'a': // Address register
378 return std::make_pair(0U, &SystemZ::ADDR64BitRegClass);
379 else if (VT == MVT::i128)
380 return std::make_pair(0U, &SystemZ::ADDR128BitRegClass);
381 return std::make_pair(0U, &SystemZ::ADDR32BitRegClass);
383 case 'f': // Floating-point register
385 return std::make_pair(0U, &SystemZ::FP64BitRegClass);
386 else if (VT == MVT::f128)
387 return std::make_pair(0U, &SystemZ::FP128BitRegClass);
388 return std::make_pair(0U, &SystemZ::FP32BitRegClass);
391 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
394 void SystemZTargetLowering::
395 LowerAsmOperandForConstraint(SDValue Op, std::string &Constraint,
396 std::vector<SDValue> &Ops,
397 SelectionDAG &DAG) const {
398 // Only support length 1 constraints for now.
399 if (Constraint.length() == 1) {
400 switch (Constraint[0]) {
401 case 'I': // Unsigned 8-bit constant
402 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op))
403 if (isUInt<8>(C->getZExtValue()))
404 Ops.push_back(DAG.getTargetConstant(C->getZExtValue(),
408 case 'J': // Unsigned 12-bit constant
409 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op))
410 if (isUInt<12>(C->getZExtValue()))
411 Ops.push_back(DAG.getTargetConstant(C->getZExtValue(),
415 case 'K': // Signed 16-bit constant
416 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op))
417 if (isInt<16>(C->getSExtValue()))
418 Ops.push_back(DAG.getTargetConstant(C->getSExtValue(),
422 case 'L': // Signed 20-bit displacement (on all targets we support)
423 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op))
424 if (isInt<20>(C->getSExtValue()))
425 Ops.push_back(DAG.getTargetConstant(C->getSExtValue(),
429 case 'M': // 0x7fffffff
430 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op))
431 if (C->getZExtValue() == 0x7fffffff)
432 Ops.push_back(DAG.getTargetConstant(C->getZExtValue(),
437 TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
440 //===----------------------------------------------------------------------===//
441 // Calling conventions
442 //===----------------------------------------------------------------------===//
444 #include "SystemZGenCallingConv.inc"
446 // Value is a value that has been passed to us in the location described by VA
447 // (and so has type VA.getLocVT()). Convert Value to VA.getValVT(), chaining
448 // any loads onto Chain.
449 static SDValue convertLocVTToValVT(SelectionDAG &DAG, SDLoc DL,
450 CCValAssign &VA, SDValue Chain,
452 // If the argument has been promoted from a smaller type, insert an
453 // assertion to capture this.
454 if (VA.getLocInfo() == CCValAssign::SExt)
455 Value = DAG.getNode(ISD::AssertSext, DL, VA.getLocVT(), Value,
456 DAG.getValueType(VA.getValVT()));
457 else if (VA.getLocInfo() == CCValAssign::ZExt)
458 Value = DAG.getNode(ISD::AssertZext, DL, VA.getLocVT(), Value,
459 DAG.getValueType(VA.getValVT()));
462 Value = DAG.getNode(ISD::TRUNCATE, DL, VA.getValVT(), Value);
463 else if (VA.getLocInfo() == CCValAssign::Indirect)
464 Value = DAG.getLoad(VA.getValVT(), DL, Chain, Value,
465 MachinePointerInfo(), false, false, false, 0);
467 assert(VA.getLocInfo() == CCValAssign::Full && "Unsupported getLocInfo");
471 // Value is a value of type VA.getValVT() that we need to copy into
472 // the location described by VA. Return a copy of Value converted to
473 // VA.getValVT(). The caller is responsible for handling indirect values.
474 static SDValue convertValVTToLocVT(SelectionDAG &DAG, SDLoc DL,
475 CCValAssign &VA, SDValue Value) {
476 switch (VA.getLocInfo()) {
477 case CCValAssign::SExt:
478 return DAG.getNode(ISD::SIGN_EXTEND, DL, VA.getLocVT(), Value);
479 case CCValAssign::ZExt:
480 return DAG.getNode(ISD::ZERO_EXTEND, DL, VA.getLocVT(), Value);
481 case CCValAssign::AExt:
482 return DAG.getNode(ISD::ANY_EXTEND, DL, VA.getLocVT(), Value);
483 case CCValAssign::Full:
486 llvm_unreachable("Unhandled getLocInfo()");
490 SDValue SystemZTargetLowering::
491 LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv, bool IsVarArg,
492 const SmallVectorImpl<ISD::InputArg> &Ins,
493 SDLoc DL, SelectionDAG &DAG,
494 SmallVectorImpl<SDValue> &InVals) const {
495 MachineFunction &MF = DAG.getMachineFunction();
496 MachineFrameInfo *MFI = MF.getFrameInfo();
497 MachineRegisterInfo &MRI = MF.getRegInfo();
498 SystemZMachineFunctionInfo *FuncInfo =
499 MF.getInfo<SystemZMachineFunctionInfo>();
500 const SystemZFrameLowering *TFL =
501 static_cast<const SystemZFrameLowering *>(TM.getFrameLowering());
503 // Assign locations to all of the incoming arguments.
504 SmallVector<CCValAssign, 16> ArgLocs;
505 CCState CCInfo(CallConv, IsVarArg, MF, TM, ArgLocs, *DAG.getContext());
506 CCInfo.AnalyzeFormalArguments(Ins, CC_SystemZ);
508 unsigned NumFixedGPRs = 0;
509 unsigned NumFixedFPRs = 0;
510 for (unsigned I = 0, E = ArgLocs.size(); I != E; ++I) {
512 CCValAssign &VA = ArgLocs[I];
513 EVT LocVT = VA.getLocVT();
515 // Arguments passed in registers
516 const TargetRegisterClass *RC;
517 switch (LocVT.getSimpleVT().SimpleTy) {
519 // Integers smaller than i64 should be promoted to i64.
520 llvm_unreachable("Unexpected argument type");
523 RC = &SystemZ::GR32BitRegClass;
527 RC = &SystemZ::GR64BitRegClass;
531 RC = &SystemZ::FP32BitRegClass;
535 RC = &SystemZ::FP64BitRegClass;
539 unsigned VReg = MRI.createVirtualRegister(RC);
540 MRI.addLiveIn(VA.getLocReg(), VReg);
541 ArgValue = DAG.getCopyFromReg(Chain, DL, VReg, LocVT);
543 assert(VA.isMemLoc() && "Argument not register or memory");
545 // Create the frame index object for this incoming parameter.
546 int FI = MFI->CreateFixedObject(LocVT.getSizeInBits() / 8,
547 VA.getLocMemOffset(), true);
549 // Create the SelectionDAG nodes corresponding to a load
550 // from this parameter. Unpromoted ints and floats are
551 // passed as right-justified 8-byte values.
552 EVT PtrVT = getPointerTy();
553 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
554 if (VA.getLocVT() == MVT::i32 || VA.getLocVT() == MVT::f32)
555 FIN = DAG.getNode(ISD::ADD, DL, PtrVT, FIN, DAG.getIntPtrConstant(4));
556 ArgValue = DAG.getLoad(LocVT, DL, Chain, FIN,
557 MachinePointerInfo::getFixedStack(FI),
558 false, false, false, 0);
561 // Convert the value of the argument register into the value that's
563 InVals.push_back(convertLocVTToValVT(DAG, DL, VA, Chain, ArgValue));
567 // Save the number of non-varargs registers for later use by va_start, etc.
568 FuncInfo->setVarArgsFirstGPR(NumFixedGPRs);
569 FuncInfo->setVarArgsFirstFPR(NumFixedFPRs);
571 // Likewise the address (in the form of a frame index) of where the
572 // first stack vararg would be. The 1-byte size here is arbitrary.
573 int64_t StackSize = CCInfo.getNextStackOffset();
574 FuncInfo->setVarArgsFrameIndex(MFI->CreateFixedObject(1, StackSize, true));
576 // ...and a similar frame index for the caller-allocated save area
577 // that will be used to store the incoming registers.
578 int64_t RegSaveOffset = TFL->getOffsetOfLocalArea();
579 unsigned RegSaveIndex = MFI->CreateFixedObject(1, RegSaveOffset, true);
580 FuncInfo->setRegSaveFrameIndex(RegSaveIndex);
582 // Store the FPR varargs in the reserved frame slots. (We store the
583 // GPRs as part of the prologue.)
584 if (NumFixedFPRs < SystemZ::NumArgFPRs) {
585 SDValue MemOps[SystemZ::NumArgFPRs];
586 for (unsigned I = NumFixedFPRs; I < SystemZ::NumArgFPRs; ++I) {
587 unsigned Offset = TFL->getRegSpillOffset(SystemZ::ArgFPRs[I]);
588 int FI = MFI->CreateFixedObject(8, RegSaveOffset + Offset, true);
589 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
590 unsigned VReg = MF.addLiveIn(SystemZ::ArgFPRs[I],
591 &SystemZ::FP64BitRegClass);
592 SDValue ArgValue = DAG.getCopyFromReg(Chain, DL, VReg, MVT::f64);
593 MemOps[I] = DAG.getStore(ArgValue.getValue(1), DL, ArgValue, FIN,
594 MachinePointerInfo::getFixedStack(FI),
598 // Join the stores, which are independent of one another.
599 Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
600 &MemOps[NumFixedFPRs],
601 SystemZ::NumArgFPRs - NumFixedFPRs);
609 SystemZTargetLowering::LowerCall(CallLoweringInfo &CLI,
610 SmallVectorImpl<SDValue> &InVals) const {
611 SelectionDAG &DAG = CLI.DAG;
613 SmallVector<ISD::OutputArg, 32> &Outs = CLI.Outs;
614 SmallVector<SDValue, 32> &OutVals = CLI.OutVals;
615 SmallVector<ISD::InputArg, 32> &Ins = CLI.Ins;
616 SDValue Chain = CLI.Chain;
617 SDValue Callee = CLI.Callee;
618 bool &isTailCall = CLI.IsTailCall;
619 CallingConv::ID CallConv = CLI.CallConv;
620 bool IsVarArg = CLI.IsVarArg;
621 MachineFunction &MF = DAG.getMachineFunction();
622 EVT PtrVT = getPointerTy();
624 // SystemZ target does not yet support tail call optimization.
627 // Analyze the operands of the call, assigning locations to each operand.
628 SmallVector<CCValAssign, 16> ArgLocs;
629 CCState ArgCCInfo(CallConv, IsVarArg, MF, TM, ArgLocs, *DAG.getContext());
630 ArgCCInfo.AnalyzeCallOperands(Outs, CC_SystemZ);
632 // Get a count of how many bytes are to be pushed on the stack.
633 unsigned NumBytes = ArgCCInfo.getNextStackOffset();
635 // Mark the start of the call.
636 Chain = DAG.getCALLSEQ_START(Chain, DAG.getConstant(NumBytes, PtrVT, true),
639 // Copy argument values to their designated locations.
640 SmallVector<std::pair<unsigned, SDValue>, 9> RegsToPass;
641 SmallVector<SDValue, 8> MemOpChains;
643 for (unsigned I = 0, E = ArgLocs.size(); I != E; ++I) {
644 CCValAssign &VA = ArgLocs[I];
645 SDValue ArgValue = OutVals[I];
647 if (VA.getLocInfo() == CCValAssign::Indirect) {
648 // Store the argument in a stack slot and pass its address.
649 SDValue SpillSlot = DAG.CreateStackTemporary(VA.getValVT());
650 int FI = cast<FrameIndexSDNode>(SpillSlot)->getIndex();
651 MemOpChains.push_back(DAG.getStore(Chain, DL, ArgValue, SpillSlot,
652 MachinePointerInfo::getFixedStack(FI),
654 ArgValue = SpillSlot;
656 ArgValue = convertValVTToLocVT(DAG, DL, VA, ArgValue);
659 // Queue up the argument copies and emit them at the end.
660 RegsToPass.push_back(std::make_pair(VA.getLocReg(), ArgValue));
662 assert(VA.isMemLoc() && "Argument not register or memory");
664 // Work out the address of the stack slot. Unpromoted ints and
665 // floats are passed as right-justified 8-byte values.
666 if (!StackPtr.getNode())
667 StackPtr = DAG.getCopyFromReg(Chain, DL, SystemZ::R15D, PtrVT);
668 unsigned Offset = SystemZMC::CallFrameSize + VA.getLocMemOffset();
669 if (VA.getLocVT() == MVT::i32 || VA.getLocVT() == MVT::f32)
671 SDValue Address = DAG.getNode(ISD::ADD, DL, PtrVT, StackPtr,
672 DAG.getIntPtrConstant(Offset));
675 MemOpChains.push_back(DAG.getStore(Chain, DL, ArgValue, Address,
676 MachinePointerInfo(),
681 // Join the stores, which are independent of one another.
682 if (!MemOpChains.empty())
683 Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
684 &MemOpChains[0], MemOpChains.size());
686 // Build a sequence of copy-to-reg nodes, chained and glued together.
688 for (unsigned I = 0, E = RegsToPass.size(); I != E; ++I) {
689 Chain = DAG.getCopyToReg(Chain, DL, RegsToPass[I].first,
690 RegsToPass[I].second, Glue);
691 Glue = Chain.getValue(1);
694 // Accept direct calls by converting symbolic call addresses to the
695 // associated Target* opcodes.
696 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
697 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), DL, PtrVT);
698 Callee = DAG.getNode(SystemZISD::PCREL_WRAPPER, DL, PtrVT, Callee);
699 } else if (ExternalSymbolSDNode *E = dyn_cast<ExternalSymbolSDNode>(Callee)) {
700 Callee = DAG.getTargetExternalSymbol(E->getSymbol(), PtrVT);
701 Callee = DAG.getNode(SystemZISD::PCREL_WRAPPER, DL, PtrVT, Callee);
704 // The first call operand is the chain and the second is the target address.
705 SmallVector<SDValue, 8> Ops;
706 Ops.push_back(Chain);
707 Ops.push_back(Callee);
709 // Add argument registers to the end of the list so that they are
710 // known live into the call.
711 for (unsigned I = 0, E = RegsToPass.size(); I != E; ++I)
712 Ops.push_back(DAG.getRegister(RegsToPass[I].first,
713 RegsToPass[I].second.getValueType()));
715 // Glue the call to the argument copies, if any.
720 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
721 Chain = DAG.getNode(SystemZISD::CALL, DL, NodeTys, &Ops[0], Ops.size());
722 Glue = Chain.getValue(1);
724 // Mark the end of the call, which is glued to the call itself.
725 Chain = DAG.getCALLSEQ_END(Chain,
726 DAG.getConstant(NumBytes, PtrVT, true),
727 DAG.getConstant(0, PtrVT, true),
729 Glue = Chain.getValue(1);
731 // Assign locations to each value returned by this call.
732 SmallVector<CCValAssign, 16> RetLocs;
733 CCState RetCCInfo(CallConv, IsVarArg, MF, TM, RetLocs, *DAG.getContext());
734 RetCCInfo.AnalyzeCallResult(Ins, RetCC_SystemZ);
736 // Copy all of the result registers out of their specified physreg.
737 for (unsigned I = 0, E = RetLocs.size(); I != E; ++I) {
738 CCValAssign &VA = RetLocs[I];
740 // Copy the value out, gluing the copy to the end of the call sequence.
741 SDValue RetValue = DAG.getCopyFromReg(Chain, DL, VA.getLocReg(),
742 VA.getLocVT(), Glue);
743 Chain = RetValue.getValue(1);
744 Glue = RetValue.getValue(2);
746 // Convert the value of the return register into the value that's
748 InVals.push_back(convertLocVTToValVT(DAG, DL, VA, Chain, RetValue));
755 SystemZTargetLowering::LowerReturn(SDValue Chain,
756 CallingConv::ID CallConv, bool IsVarArg,
757 const SmallVectorImpl<ISD::OutputArg> &Outs,
758 const SmallVectorImpl<SDValue> &OutVals,
759 SDLoc DL, SelectionDAG &DAG) const {
760 MachineFunction &MF = DAG.getMachineFunction();
762 // Assign locations to each returned value.
763 SmallVector<CCValAssign, 16> RetLocs;
764 CCState RetCCInfo(CallConv, IsVarArg, MF, TM, RetLocs, *DAG.getContext());
765 RetCCInfo.AnalyzeReturn(Outs, RetCC_SystemZ);
767 // Quick exit for void returns
769 return DAG.getNode(SystemZISD::RET_FLAG, DL, MVT::Other, Chain);
771 // Copy the result values into the output registers.
773 SmallVector<SDValue, 4> RetOps;
774 RetOps.push_back(Chain);
775 for (unsigned I = 0, E = RetLocs.size(); I != E; ++I) {
776 CCValAssign &VA = RetLocs[I];
777 SDValue RetValue = OutVals[I];
779 // Make the return register live on exit.
780 assert(VA.isRegLoc() && "Can only return in registers!");
782 // Promote the value as required.
783 RetValue = convertValVTToLocVT(DAG, DL, VA, RetValue);
785 // Chain and glue the copies together.
786 unsigned Reg = VA.getLocReg();
787 Chain = DAG.getCopyToReg(Chain, DL, Reg, RetValue, Glue);
788 Glue = Chain.getValue(1);
789 RetOps.push_back(DAG.getRegister(Reg, VA.getLocVT()));
792 // Update chain and glue.
795 RetOps.push_back(Glue);
797 return DAG.getNode(SystemZISD::RET_FLAG, DL, MVT::Other,
798 RetOps.data(), RetOps.size());
801 // CC is a comparison that will be implemented using an integer or
802 // floating-point comparison. Return the condition code mask for
803 // a branch on true. In the integer case, CCMASK_CMP_UO is set for
804 // unsigned comparisons and clear for signed ones. In the floating-point
805 // case, CCMASK_CMP_UO has its normal mask meaning (unordered).
806 static unsigned CCMaskForCondCode(ISD::CondCode CC) {
808 case ISD::SET##X: return SystemZ::CCMASK_CMP_##X; \
809 case ISD::SETO##X: return SystemZ::CCMASK_CMP_##X; \
810 case ISD::SETU##X: return SystemZ::CCMASK_CMP_UO | SystemZ::CCMASK_CMP_##X
814 llvm_unreachable("Invalid integer condition!");
823 case ISD::SETO: return SystemZ::CCMASK_CMP_O;
824 case ISD::SETUO: return SystemZ::CCMASK_CMP_UO;
829 // If a comparison described by IsUnsigned, CCMask, CmpOp0 and CmpOp1
830 // is suitable for CLI(Y), CHHSI or CLHHSI, adjust the operands as necessary.
831 static void adjustSubwordCmp(SelectionDAG &DAG, bool &IsUnsigned,
832 SDValue &CmpOp0, SDValue &CmpOp1,
834 // For us to make any changes, it must a comparison between a single-use
835 // load and a constant.
836 if (!CmpOp0.hasOneUse() ||
837 CmpOp0.getOpcode() != ISD::LOAD ||
838 CmpOp1.getOpcode() != ISD::Constant)
841 // We must have an 8- or 16-bit load.
842 LoadSDNode *Load = cast<LoadSDNode>(CmpOp0);
843 unsigned NumBits = Load->getMemoryVT().getStoreSizeInBits();
844 if (NumBits != 8 && NumBits != 16)
847 // The load must be an extending one and the constant must be within the
848 // range of the unextended value.
849 ConstantSDNode *Constant = cast<ConstantSDNode>(CmpOp1);
850 uint64_t Value = Constant->getZExtValue();
851 uint64_t Mask = (1 << NumBits) - 1;
852 if (Load->getExtensionType() == ISD::SEXTLOAD) {
853 int64_t SignedValue = Constant->getSExtValue();
854 if (uint64_t(SignedValue) + (1ULL << (NumBits - 1)) > Mask)
856 // Unsigned comparison between two sign-extended values is equivalent
857 // to unsigned comparison between two zero-extended values.
860 else if (CCMask == SystemZ::CCMASK_CMP_EQ ||
861 CCMask == SystemZ::CCMASK_CMP_NE)
862 // Any choice of IsUnsigned is OK for equality comparisons.
863 // We could use either CHHSI or CLHHSI for 16-bit comparisons,
864 // but since we use CLHHSI for zero extensions, it seems better
865 // to be consistent and do the same here.
866 Value &= Mask, IsUnsigned = true;
867 else if (NumBits == 8) {
868 // Try to treat the comparison as unsigned, so that we can use CLI.
869 // Adjust CCMask and Value as necessary.
870 if (Value == 0 && CCMask == SystemZ::CCMASK_CMP_LT)
871 // Test whether the high bit of the byte is set.
872 Value = 127, CCMask = SystemZ::CCMASK_CMP_GT, IsUnsigned = true;
873 else if (SignedValue == -1 && CCMask == SystemZ::CCMASK_CMP_GT)
874 // Test whether the high bit of the byte is clear.
875 Value = 128, CCMask = SystemZ::CCMASK_CMP_LT, IsUnsigned = true;
877 // No instruction exists for this combination.
880 } else if (Load->getExtensionType() == ISD::ZEXTLOAD) {
883 // Signed comparison between two zero-extended values is equivalent
884 // to unsigned comparison.
889 // Make sure that the first operand is an i32 of the right extension type.
890 ISD::LoadExtType ExtType = IsUnsigned ? ISD::ZEXTLOAD : ISD::SEXTLOAD;
891 if (CmpOp0.getValueType() != MVT::i32 ||
892 Load->getExtensionType() != ExtType)
893 CmpOp0 = DAG.getExtLoad(ExtType, SDLoc(Load), MVT::i32,
894 Load->getChain(), Load->getBasePtr(),
895 Load->getPointerInfo(), Load->getMemoryVT(),
896 Load->isVolatile(), Load->isNonTemporal(),
897 Load->getAlignment());
899 // Make sure that the second operand is an i32 with the right value.
900 if (CmpOp1.getValueType() != MVT::i32 ||
901 Value != Constant->getZExtValue())
902 CmpOp1 = DAG.getConstant(Value, MVT::i32);
905 // Return true if a comparison described by CCMask, CmpOp0 and CmpOp1
906 // is an equality comparison that is better implemented using unsigned
907 // rather than signed comparison instructions.
908 static bool preferUnsignedComparison(SelectionDAG &DAG, SDValue CmpOp0,
909 SDValue CmpOp1, unsigned CCMask) {
910 // The test must be for equality or inequality.
911 if (CCMask != SystemZ::CCMASK_CMP_EQ && CCMask != SystemZ::CCMASK_CMP_NE)
914 if (CmpOp1.getOpcode() == ISD::Constant) {
915 uint64_t Value = cast<ConstantSDNode>(CmpOp1)->getSExtValue();
917 // If we're comparing with memory, prefer unsigned comparisons for
918 // values that are in the unsigned 16-bit range but not the signed
919 // 16-bit range. We want to use CLFHSI and CLGHSI.
920 if (CmpOp0.hasOneUse() &&
921 ISD::isNormalLoad(CmpOp0.getNode()) &&
922 (Value >= 32768 && Value < 65536))
925 // Use unsigned comparisons for values that are in the CLGFI range
926 // but not in the CGFI range.
927 if (CmpOp0.getValueType() == MVT::i64 && (Value >> 31) == 1)
933 // Prefer CL for zero-extended loads.
934 if (CmpOp1.getOpcode() == ISD::ZERO_EXTEND ||
935 ISD::isZEXTLoad(CmpOp1.getNode()))
938 // ...and for "in-register" zero extensions.
939 if (CmpOp1.getOpcode() == ISD::AND && CmpOp1.getValueType() == MVT::i64) {
940 SDValue Mask = CmpOp1.getOperand(1);
941 if (Mask.getOpcode() == ISD::Constant &&
942 cast<ConstantSDNode>(Mask)->getZExtValue() == 0xffffffff)
949 // Return a target node that compares CmpOp0 and CmpOp1. Set CCMask to the
950 // 4-bit condition-code mask for CC.
951 static SDValue emitCmp(SelectionDAG &DAG, SDValue CmpOp0, SDValue CmpOp1,
952 ISD::CondCode CC, unsigned &CCMask) {
953 bool IsUnsigned = false;
954 CCMask = CCMaskForCondCode(CC);
955 if (!CmpOp0.getValueType().isFloatingPoint()) {
956 IsUnsigned = CCMask & SystemZ::CCMASK_CMP_UO;
957 CCMask &= ~SystemZ::CCMASK_CMP_UO;
958 adjustSubwordCmp(DAG, IsUnsigned, CmpOp0, CmpOp1, CCMask);
959 if (preferUnsignedComparison(DAG, CmpOp0, CmpOp1, CCMask))
964 return DAG.getNode((IsUnsigned ? SystemZISD::UCMP : SystemZISD::CMP),
965 DL, MVT::Glue, CmpOp0, CmpOp1);
968 // Lower a binary operation that produces two VT results, one in each
969 // half of a GR128 pair. Op0 and Op1 are the VT operands to the operation,
970 // Extend extends Op0 to a GR128, and Opcode performs the GR128 operation
971 // on the extended Op0 and (unextended) Op1. Store the even register result
972 // in Even and the odd register result in Odd.
973 static void lowerGR128Binary(SelectionDAG &DAG, SDLoc DL, EVT VT,
974 unsigned Extend, unsigned Opcode,
975 SDValue Op0, SDValue Op1,
976 SDValue &Even, SDValue &Odd) {
977 SDNode *In128 = DAG.getMachineNode(Extend, DL, MVT::Untyped, Op0);
978 SDValue Result = DAG.getNode(Opcode, DL, MVT::Untyped,
979 SDValue(In128, 0), Op1);
980 bool Is32Bit = is32Bit(VT);
981 SDValue SubReg0 = DAG.getTargetConstant(SystemZ::even128(Is32Bit), VT);
982 SDValue SubReg1 = DAG.getTargetConstant(SystemZ::odd128(Is32Bit), VT);
983 SDNode *Reg0 = DAG.getMachineNode(TargetOpcode::EXTRACT_SUBREG, DL,
984 VT, Result, SubReg0);
985 SDNode *Reg1 = DAG.getMachineNode(TargetOpcode::EXTRACT_SUBREG, DL,
986 VT, Result, SubReg1);
987 Even = SDValue(Reg0, 0);
988 Odd = SDValue(Reg1, 0);
991 SDValue SystemZTargetLowering::lowerBR_CC(SDValue Op, SelectionDAG &DAG) const {
992 SDValue Chain = Op.getOperand(0);
993 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
994 SDValue CmpOp0 = Op.getOperand(2);
995 SDValue CmpOp1 = Op.getOperand(3);
996 SDValue Dest = Op.getOperand(4);
1000 SDValue Flags = emitCmp(DAG, CmpOp0, CmpOp1, CC, CCMask);
1001 return DAG.getNode(SystemZISD::BR_CCMASK, DL, Op.getValueType(),
1002 Chain, DAG.getConstant(CCMask, MVT::i32), Dest, Flags);
1005 SDValue SystemZTargetLowering::lowerSELECT_CC(SDValue Op,
1006 SelectionDAG &DAG) const {
1007 SDValue CmpOp0 = Op.getOperand(0);
1008 SDValue CmpOp1 = Op.getOperand(1);
1009 SDValue TrueOp = Op.getOperand(2);
1010 SDValue FalseOp = Op.getOperand(3);
1011 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
1015 SDValue Flags = emitCmp(DAG, CmpOp0, CmpOp1, CC, CCMask);
1017 SmallVector<SDValue, 4> Ops;
1018 Ops.push_back(TrueOp);
1019 Ops.push_back(FalseOp);
1020 Ops.push_back(DAG.getConstant(CCMask, MVT::i32));
1021 Ops.push_back(Flags);
1023 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::Glue);
1024 return DAG.getNode(SystemZISD::SELECT_CCMASK, DL, VTs, &Ops[0], Ops.size());
1027 SDValue SystemZTargetLowering::lowerGlobalAddress(GlobalAddressSDNode *Node,
1028 SelectionDAG &DAG) const {
1030 const GlobalValue *GV = Node->getGlobal();
1031 int64_t Offset = Node->getOffset();
1032 EVT PtrVT = getPointerTy();
1033 Reloc::Model RM = TM.getRelocationModel();
1034 CodeModel::Model CM = TM.getCodeModel();
1037 if (Subtarget.isPC32DBLSymbol(GV, RM, CM)) {
1038 // Make sure that the offset is aligned to a halfword. If it isn't,
1039 // create an "anchor" at the previous 12-bit boundary.
1040 // FIXME check whether there is a better way of handling this.
1042 Result = DAG.getTargetGlobalAddress(GV, DL, PtrVT,
1043 Offset & ~uint64_t(0xfff));
1046 Result = DAG.getTargetGlobalAddress(GV, DL, PtrVT, Offset);
1049 Result = DAG.getNode(SystemZISD::PCREL_WRAPPER, DL, PtrVT, Result);
1051 Result = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0, SystemZII::MO_GOT);
1052 Result = DAG.getNode(SystemZISD::PCREL_WRAPPER, DL, PtrVT, Result);
1053 Result = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), Result,
1054 MachinePointerInfo::getGOT(), false, false, false, 0);
1057 // If there was a non-zero offset that we didn't fold, create an explicit
1060 Result = DAG.getNode(ISD::ADD, DL, PtrVT, Result,
1061 DAG.getConstant(Offset, PtrVT));
1066 SDValue SystemZTargetLowering::lowerGlobalTLSAddress(GlobalAddressSDNode *Node,
1067 SelectionDAG &DAG) const {
1069 const GlobalValue *GV = Node->getGlobal();
1070 EVT PtrVT = getPointerTy();
1071 TLSModel::Model model = TM.getTLSModel(GV);
1073 if (model != TLSModel::LocalExec)
1074 llvm_unreachable("only local-exec TLS mode supported");
1076 // The high part of the thread pointer is in access register 0.
1077 SDValue TPHi = DAG.getNode(SystemZISD::EXTRACT_ACCESS, DL, MVT::i32,
1078 DAG.getConstant(0, MVT::i32));
1079 TPHi = DAG.getNode(ISD::ANY_EXTEND, DL, PtrVT, TPHi);
1081 // The low part of the thread pointer is in access register 1.
1082 SDValue TPLo = DAG.getNode(SystemZISD::EXTRACT_ACCESS, DL, MVT::i32,
1083 DAG.getConstant(1, MVT::i32));
1084 TPLo = DAG.getNode(ISD::ZERO_EXTEND, DL, PtrVT, TPLo);
1086 // Merge them into a single 64-bit address.
1087 SDValue TPHiShifted = DAG.getNode(ISD::SHL, DL, PtrVT, TPHi,
1088 DAG.getConstant(32, PtrVT));
1089 SDValue TP = DAG.getNode(ISD::OR, DL, PtrVT, TPHiShifted, TPLo);
1091 // Get the offset of GA from the thread pointer.
1092 SystemZConstantPoolValue *CPV =
1093 SystemZConstantPoolValue::Create(GV, SystemZCP::NTPOFF);
1095 // Force the offset into the constant pool and load it from there.
1096 SDValue CPAddr = DAG.getConstantPool(CPV, PtrVT, 8);
1097 SDValue Offset = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(),
1098 CPAddr, MachinePointerInfo::getConstantPool(),
1099 false, false, false, 0);
1101 // Add the base and offset together.
1102 return DAG.getNode(ISD::ADD, DL, PtrVT, TP, Offset);
1105 SDValue SystemZTargetLowering::lowerBlockAddress(BlockAddressSDNode *Node,
1106 SelectionDAG &DAG) const {
1108 const BlockAddress *BA = Node->getBlockAddress();
1109 int64_t Offset = Node->getOffset();
1110 EVT PtrVT = getPointerTy();
1112 SDValue Result = DAG.getTargetBlockAddress(BA, PtrVT, Offset);
1113 Result = DAG.getNode(SystemZISD::PCREL_WRAPPER, DL, PtrVT, Result);
1117 SDValue SystemZTargetLowering::lowerJumpTable(JumpTableSDNode *JT,
1118 SelectionDAG &DAG) const {
1120 EVT PtrVT = getPointerTy();
1121 SDValue Result = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
1123 // Use LARL to load the address of the table.
1124 return DAG.getNode(SystemZISD::PCREL_WRAPPER, DL, PtrVT, Result);
1127 SDValue SystemZTargetLowering::lowerConstantPool(ConstantPoolSDNode *CP,
1128 SelectionDAG &DAG) const {
1130 EVT PtrVT = getPointerTy();
1133 if (CP->isMachineConstantPoolEntry())
1134 Result = DAG.getTargetConstantPool(CP->getMachineCPVal(), PtrVT,
1135 CP->getAlignment());
1137 Result = DAG.getTargetConstantPool(CP->getConstVal(), PtrVT,
1138 CP->getAlignment(), CP->getOffset());
1140 // Use LARL to load the address of the constant pool entry.
1141 return DAG.getNode(SystemZISD::PCREL_WRAPPER, DL, PtrVT, Result);
1144 SDValue SystemZTargetLowering::lowerBITCAST(SDValue Op,
1145 SelectionDAG &DAG) const {
1147 SDValue In = Op.getOperand(0);
1148 EVT InVT = In.getValueType();
1149 EVT ResVT = Op.getValueType();
1151 SDValue SubReg32 = DAG.getTargetConstant(SystemZ::subreg_32bit, MVT::i64);
1152 SDValue Shift32 = DAG.getConstant(32, MVT::i64);
1153 if (InVT == MVT::i32 && ResVT == MVT::f32) {
1154 SDValue In64 = DAG.getNode(ISD::ANY_EXTEND, DL, MVT::i64, In);
1155 SDValue Shift = DAG.getNode(ISD::SHL, DL, MVT::i64, In64, Shift32);
1156 SDValue Out64 = DAG.getNode(ISD::BITCAST, DL, MVT::f64, Shift);
1157 SDNode *Out = DAG.getMachineNode(TargetOpcode::EXTRACT_SUBREG, DL,
1158 MVT::f32, Out64, SubReg32);
1159 return SDValue(Out, 0);
1161 if (InVT == MVT::f32 && ResVT == MVT::i32) {
1162 SDNode *U64 = DAG.getMachineNode(TargetOpcode::IMPLICIT_DEF, DL, MVT::f64);
1163 SDNode *In64 = DAG.getMachineNode(TargetOpcode::INSERT_SUBREG, DL,
1164 MVT::f64, SDValue(U64, 0), In, SubReg32);
1165 SDValue Out64 = DAG.getNode(ISD::BITCAST, DL, MVT::i64, SDValue(In64, 0));
1166 SDValue Shift = DAG.getNode(ISD::SRL, DL, MVT::i64, Out64, Shift32);
1167 SDValue Out = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, Shift);
1170 llvm_unreachable("Unexpected bitcast combination");
1173 SDValue SystemZTargetLowering::lowerVASTART(SDValue Op,
1174 SelectionDAG &DAG) const {
1175 MachineFunction &MF = DAG.getMachineFunction();
1176 SystemZMachineFunctionInfo *FuncInfo =
1177 MF.getInfo<SystemZMachineFunctionInfo>();
1178 EVT PtrVT = getPointerTy();
1180 SDValue Chain = Op.getOperand(0);
1181 SDValue Addr = Op.getOperand(1);
1182 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
1185 // The initial values of each field.
1186 const unsigned NumFields = 4;
1187 SDValue Fields[NumFields] = {
1188 DAG.getConstant(FuncInfo->getVarArgsFirstGPR(), PtrVT),
1189 DAG.getConstant(FuncInfo->getVarArgsFirstFPR(), PtrVT),
1190 DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT),
1191 DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(), PtrVT)
1194 // Store each field into its respective slot.
1195 SDValue MemOps[NumFields];
1196 unsigned Offset = 0;
1197 for (unsigned I = 0; I < NumFields; ++I) {
1198 SDValue FieldAddr = Addr;
1200 FieldAddr = DAG.getNode(ISD::ADD, DL, PtrVT, FieldAddr,
1201 DAG.getIntPtrConstant(Offset));
1202 MemOps[I] = DAG.getStore(Chain, DL, Fields[I], FieldAddr,
1203 MachinePointerInfo(SV, Offset),
1207 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, MemOps, NumFields);
1210 SDValue SystemZTargetLowering::lowerVACOPY(SDValue Op,
1211 SelectionDAG &DAG) const {
1212 SDValue Chain = Op.getOperand(0);
1213 SDValue DstPtr = Op.getOperand(1);
1214 SDValue SrcPtr = Op.getOperand(2);
1215 const Value *DstSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
1216 const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
1219 return DAG.getMemcpy(Chain, DL, DstPtr, SrcPtr, DAG.getIntPtrConstant(32),
1220 /*Align*/8, /*isVolatile*/false, /*AlwaysInline*/false,
1221 MachinePointerInfo(DstSV), MachinePointerInfo(SrcSV));
1224 SDValue SystemZTargetLowering::
1225 lowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const {
1226 SDValue Chain = Op.getOperand(0);
1227 SDValue Size = Op.getOperand(1);
1230 unsigned SPReg = getStackPointerRegisterToSaveRestore();
1232 // Get a reference to the stack pointer.
1233 SDValue OldSP = DAG.getCopyFromReg(Chain, DL, SPReg, MVT::i64);
1235 // Get the new stack pointer value.
1236 SDValue NewSP = DAG.getNode(ISD::SUB, DL, MVT::i64, OldSP, Size);
1238 // Copy the new stack pointer back.
1239 Chain = DAG.getCopyToReg(Chain, DL, SPReg, NewSP);
1241 // The allocated data lives above the 160 bytes allocated for the standard
1242 // frame, plus any outgoing stack arguments. We don't know how much that
1243 // amounts to yet, so emit a special ADJDYNALLOC placeholder.
1244 SDValue ArgAdjust = DAG.getNode(SystemZISD::ADJDYNALLOC, DL, MVT::i64);
1245 SDValue Result = DAG.getNode(ISD::ADD, DL, MVT::i64, NewSP, ArgAdjust);
1247 SDValue Ops[2] = { Result, Chain };
1248 return DAG.getMergeValues(Ops, 2, DL);
1251 SDValue SystemZTargetLowering::lowerUMUL_LOHI(SDValue Op,
1252 SelectionDAG &DAG) const {
1253 EVT VT = Op.getValueType();
1255 assert(!is32Bit(VT) && "Only support 64-bit UMUL_LOHI");
1257 // UMUL_LOHI64 returns the low result in the odd register and the high
1258 // result in the even register. UMUL_LOHI is defined to return the
1259 // low half first, so the results are in reverse order.
1261 lowerGR128Binary(DAG, DL, VT, SystemZ::AEXT128_64, SystemZISD::UMUL_LOHI64,
1262 Op.getOperand(0), Op.getOperand(1), Ops[1], Ops[0]);
1263 return DAG.getMergeValues(Ops, 2, DL);
1266 SDValue SystemZTargetLowering::lowerSDIVREM(SDValue Op,
1267 SelectionDAG &DAG) const {
1268 SDValue Op0 = Op.getOperand(0);
1269 SDValue Op1 = Op.getOperand(1);
1270 EVT VT = Op.getValueType();
1273 // We use DSGF for 32-bit division.
1275 Op0 = DAG.getNode(ISD::SIGN_EXTEND, DL, MVT::i64, Op0);
1276 Op1 = DAG.getNode(ISD::SIGN_EXTEND, DL, MVT::i64, Op1);
1279 // DSG(F) takes a 64-bit dividend, so the even register in the GR128
1280 // input is "don't care". The instruction returns the remainder in
1281 // the even register and the quotient in the odd register.
1283 lowerGR128Binary(DAG, DL, VT, SystemZ::AEXT128_64, SystemZISD::SDIVREM64,
1284 Op0, Op1, Ops[1], Ops[0]);
1285 return DAG.getMergeValues(Ops, 2, DL);
1288 SDValue SystemZTargetLowering::lowerUDIVREM(SDValue Op,
1289 SelectionDAG &DAG) const {
1290 EVT VT = Op.getValueType();
1293 // DL(G) uses a double-width dividend, so we need to clear the even
1294 // register in the GR128 input. The instruction returns the remainder
1295 // in the even register and the quotient in the odd register.
1298 lowerGR128Binary(DAG, DL, VT, SystemZ::ZEXT128_32, SystemZISD::UDIVREM32,
1299 Op.getOperand(0), Op.getOperand(1), Ops[1], Ops[0]);
1301 lowerGR128Binary(DAG, DL, VT, SystemZ::ZEXT128_64, SystemZISD::UDIVREM64,
1302 Op.getOperand(0), Op.getOperand(1), Ops[1], Ops[0]);
1303 return DAG.getMergeValues(Ops, 2, DL);
1306 SDValue SystemZTargetLowering::lowerOR(SDValue Op, SelectionDAG &DAG) const {
1307 assert(Op.getValueType() == MVT::i64 && "Should be 64-bit operation");
1309 // Get the known-zero masks for each operand.
1310 SDValue Ops[] = { Op.getOperand(0), Op.getOperand(1) };
1311 APInt KnownZero[2], KnownOne[2];
1312 DAG.ComputeMaskedBits(Ops[0], KnownZero[0], KnownOne[0]);
1313 DAG.ComputeMaskedBits(Ops[1], KnownZero[1], KnownOne[1]);
1315 // See if the upper 32 bits of one operand and the lower 32 bits of the
1316 // other are known zero. They are the low and high operands respectively.
1317 uint64_t Masks[] = { KnownZero[0].getZExtValue(),
1318 KnownZero[1].getZExtValue() };
1320 if ((Masks[0] >> 32) == 0xffffffff && uint32_t(Masks[1]) == 0xffffffff)
1322 else if ((Masks[1] >> 32) == 0xffffffff && uint32_t(Masks[0]) == 0xffffffff)
1327 SDValue LowOp = Ops[Low];
1328 SDValue HighOp = Ops[High];
1330 // If the high part is a constant, we're better off using IILH.
1331 if (HighOp.getOpcode() == ISD::Constant)
1334 // If the low part is a constant that is outside the range of LHI,
1335 // then we're better off using IILF.
1336 if (LowOp.getOpcode() == ISD::Constant) {
1337 int64_t Value = int32_t(cast<ConstantSDNode>(LowOp)->getZExtValue());
1338 if (!isInt<16>(Value))
1342 // Check whether the high part is an AND that doesn't change the
1343 // high 32 bits and just masks out low bits. We can skip it if so.
1344 if (HighOp.getOpcode() == ISD::AND &&
1345 HighOp.getOperand(1).getOpcode() == ISD::Constant) {
1346 ConstantSDNode *MaskNode = cast<ConstantSDNode>(HighOp.getOperand(1));
1347 uint64_t Mask = MaskNode->getZExtValue() | Masks[High];
1348 if ((Mask >> 32) == 0xffffffff)
1349 HighOp = HighOp.getOperand(0);
1352 // Take advantage of the fact that all GR32 operations only change the
1353 // low 32 bits by truncating Low to an i32 and inserting it directly
1354 // using a subreg. The interesting cases are those where the truncation
1357 SDValue Low32 = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, LowOp);
1358 SDValue SubReg32 = DAG.getTargetConstant(SystemZ::subreg_32bit, MVT::i64);
1359 SDNode *Result = DAG.getMachineNode(TargetOpcode::INSERT_SUBREG, DL,
1360 MVT::i64, HighOp, Low32, SubReg32);
1361 return SDValue(Result, 0);
1364 // Op is an 8-, 16-bit or 32-bit ATOMIC_LOAD_* operation. Lower the first
1365 // two into the fullword ATOMIC_LOADW_* operation given by Opcode.
1366 SDValue SystemZTargetLowering::lowerATOMIC_LOAD(SDValue Op,
1368 unsigned Opcode) const {
1369 AtomicSDNode *Node = cast<AtomicSDNode>(Op.getNode());
1371 // 32-bit operations need no code outside the main loop.
1372 EVT NarrowVT = Node->getMemoryVT();
1373 EVT WideVT = MVT::i32;
1374 if (NarrowVT == WideVT)
1377 int64_t BitSize = NarrowVT.getSizeInBits();
1378 SDValue ChainIn = Node->getChain();
1379 SDValue Addr = Node->getBasePtr();
1380 SDValue Src2 = Node->getVal();
1381 MachineMemOperand *MMO = Node->getMemOperand();
1383 EVT PtrVT = Addr.getValueType();
1385 // Convert atomic subtracts of constants into additions.
1386 if (Opcode == SystemZISD::ATOMIC_LOADW_SUB)
1387 if (ConstantSDNode *Const = dyn_cast<ConstantSDNode>(Src2)) {
1388 Opcode = SystemZISD::ATOMIC_LOADW_ADD;
1389 Src2 = DAG.getConstant(-Const->getSExtValue(), Src2.getValueType());
1392 // Get the address of the containing word.
1393 SDValue AlignedAddr = DAG.getNode(ISD::AND, DL, PtrVT, Addr,
1394 DAG.getConstant(-4, PtrVT));
1396 // Get the number of bits that the word must be rotated left in order
1397 // to bring the field to the top bits of a GR32.
1398 SDValue BitShift = DAG.getNode(ISD::SHL, DL, PtrVT, Addr,
1399 DAG.getConstant(3, PtrVT));
1400 BitShift = DAG.getNode(ISD::TRUNCATE, DL, WideVT, BitShift);
1402 // Get the complementing shift amount, for rotating a field in the top
1403 // bits back to its proper position.
1404 SDValue NegBitShift = DAG.getNode(ISD::SUB, DL, WideVT,
1405 DAG.getConstant(0, WideVT), BitShift);
1407 // Extend the source operand to 32 bits and prepare it for the inner loop.
1408 // ATOMIC_SWAPW uses RISBG to rotate the field left, but all other
1409 // operations require the source to be shifted in advance. (This shift
1410 // can be folded if the source is constant.) For AND and NAND, the lower
1411 // bits must be set, while for other opcodes they should be left clear.
1412 if (Opcode != SystemZISD::ATOMIC_SWAPW)
1413 Src2 = DAG.getNode(ISD::SHL, DL, WideVT, Src2,
1414 DAG.getConstant(32 - BitSize, WideVT));
1415 if (Opcode == SystemZISD::ATOMIC_LOADW_AND ||
1416 Opcode == SystemZISD::ATOMIC_LOADW_NAND)
1417 Src2 = DAG.getNode(ISD::OR, DL, WideVT, Src2,
1418 DAG.getConstant(uint32_t(-1) >> BitSize, WideVT));
1420 // Construct the ATOMIC_LOADW_* node.
1421 SDVTList VTList = DAG.getVTList(WideVT, MVT::Other);
1422 SDValue Ops[] = { ChainIn, AlignedAddr, Src2, BitShift, NegBitShift,
1423 DAG.getConstant(BitSize, WideVT) };
1424 SDValue AtomicOp = DAG.getMemIntrinsicNode(Opcode, DL, VTList, Ops,
1425 array_lengthof(Ops),
1428 // Rotate the result of the final CS so that the field is in the lower
1429 // bits of a GR32, then truncate it.
1430 SDValue ResultShift = DAG.getNode(ISD::ADD, DL, WideVT, BitShift,
1431 DAG.getConstant(BitSize, WideVT));
1432 SDValue Result = DAG.getNode(ISD::ROTL, DL, WideVT, AtomicOp, ResultShift);
1434 SDValue RetOps[2] = { Result, AtomicOp.getValue(1) };
1435 return DAG.getMergeValues(RetOps, 2, DL);
1438 // Node is an 8- or 16-bit ATOMIC_CMP_SWAP operation. Lower the first two
1439 // into a fullword ATOMIC_CMP_SWAPW operation.
1440 SDValue SystemZTargetLowering::lowerATOMIC_CMP_SWAP(SDValue Op,
1441 SelectionDAG &DAG) const {
1442 AtomicSDNode *Node = cast<AtomicSDNode>(Op.getNode());
1444 // We have native support for 32-bit compare and swap.
1445 EVT NarrowVT = Node->getMemoryVT();
1446 EVT WideVT = MVT::i32;
1447 if (NarrowVT == WideVT)
1450 int64_t BitSize = NarrowVT.getSizeInBits();
1451 SDValue ChainIn = Node->getOperand(0);
1452 SDValue Addr = Node->getOperand(1);
1453 SDValue CmpVal = Node->getOperand(2);
1454 SDValue SwapVal = Node->getOperand(3);
1455 MachineMemOperand *MMO = Node->getMemOperand();
1457 EVT PtrVT = Addr.getValueType();
1459 // Get the address of the containing word.
1460 SDValue AlignedAddr = DAG.getNode(ISD::AND, DL, PtrVT, Addr,
1461 DAG.getConstant(-4, PtrVT));
1463 // Get the number of bits that the word must be rotated left in order
1464 // to bring the field to the top bits of a GR32.
1465 SDValue BitShift = DAG.getNode(ISD::SHL, DL, PtrVT, Addr,
1466 DAG.getConstant(3, PtrVT));
1467 BitShift = DAG.getNode(ISD::TRUNCATE, DL, WideVT, BitShift);
1469 // Get the complementing shift amount, for rotating a field in the top
1470 // bits back to its proper position.
1471 SDValue NegBitShift = DAG.getNode(ISD::SUB, DL, WideVT,
1472 DAG.getConstant(0, WideVT), BitShift);
1474 // Construct the ATOMIC_CMP_SWAPW node.
1475 SDVTList VTList = DAG.getVTList(WideVT, MVT::Other);
1476 SDValue Ops[] = { ChainIn, AlignedAddr, CmpVal, SwapVal, BitShift,
1477 NegBitShift, DAG.getConstant(BitSize, WideVT) };
1478 SDValue AtomicOp = DAG.getMemIntrinsicNode(SystemZISD::ATOMIC_CMP_SWAPW, DL,
1479 VTList, Ops, array_lengthof(Ops),
1484 SDValue SystemZTargetLowering::lowerSTACKSAVE(SDValue Op,
1485 SelectionDAG &DAG) const {
1486 MachineFunction &MF = DAG.getMachineFunction();
1487 MF.getInfo<SystemZMachineFunctionInfo>()->setManipulatesSP(true);
1488 return DAG.getCopyFromReg(Op.getOperand(0), SDLoc(Op),
1489 SystemZ::R15D, Op.getValueType());
1492 SDValue SystemZTargetLowering::lowerSTACKRESTORE(SDValue Op,
1493 SelectionDAG &DAG) const {
1494 MachineFunction &MF = DAG.getMachineFunction();
1495 MF.getInfo<SystemZMachineFunctionInfo>()->setManipulatesSP(true);
1496 return DAG.getCopyToReg(Op.getOperand(0), SDLoc(Op),
1497 SystemZ::R15D, Op.getOperand(1));
1500 SDValue SystemZTargetLowering::LowerOperation(SDValue Op,
1501 SelectionDAG &DAG) const {
1502 switch (Op.getOpcode()) {
1504 return lowerBR_CC(Op, DAG);
1505 case ISD::SELECT_CC:
1506 return lowerSELECT_CC(Op, DAG);
1507 case ISD::GlobalAddress:
1508 return lowerGlobalAddress(cast<GlobalAddressSDNode>(Op), DAG);
1509 case ISD::GlobalTLSAddress:
1510 return lowerGlobalTLSAddress(cast<GlobalAddressSDNode>(Op), DAG);
1511 case ISD::BlockAddress:
1512 return lowerBlockAddress(cast<BlockAddressSDNode>(Op), DAG);
1513 case ISD::JumpTable:
1514 return lowerJumpTable(cast<JumpTableSDNode>(Op), DAG);
1515 case ISD::ConstantPool:
1516 return lowerConstantPool(cast<ConstantPoolSDNode>(Op), DAG);
1518 return lowerBITCAST(Op, DAG);
1520 return lowerVASTART(Op, DAG);
1522 return lowerVACOPY(Op, DAG);
1523 case ISD::DYNAMIC_STACKALLOC:
1524 return lowerDYNAMIC_STACKALLOC(Op, DAG);
1525 case ISD::UMUL_LOHI:
1526 return lowerUMUL_LOHI(Op, DAG);
1528 return lowerSDIVREM(Op, DAG);
1530 return lowerUDIVREM(Op, DAG);
1532 return lowerOR(Op, DAG);
1533 case ISD::ATOMIC_SWAP:
1534 return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_SWAPW);
1535 case ISD::ATOMIC_LOAD_ADD:
1536 return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_ADD);
1537 case ISD::ATOMIC_LOAD_SUB:
1538 return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_SUB);
1539 case ISD::ATOMIC_LOAD_AND:
1540 return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_AND);
1541 case ISD::ATOMIC_LOAD_OR:
1542 return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_OR);
1543 case ISD::ATOMIC_LOAD_XOR:
1544 return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_XOR);
1545 case ISD::ATOMIC_LOAD_NAND:
1546 return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_NAND);
1547 case ISD::ATOMIC_LOAD_MIN:
1548 return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_MIN);
1549 case ISD::ATOMIC_LOAD_MAX:
1550 return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_MAX);
1551 case ISD::ATOMIC_LOAD_UMIN:
1552 return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_UMIN);
1553 case ISD::ATOMIC_LOAD_UMAX:
1554 return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_UMAX);
1555 case ISD::ATOMIC_CMP_SWAP:
1556 return lowerATOMIC_CMP_SWAP(Op, DAG);
1557 case ISD::STACKSAVE:
1558 return lowerSTACKSAVE(Op, DAG);
1559 case ISD::STACKRESTORE:
1560 return lowerSTACKRESTORE(Op, DAG);
1562 llvm_unreachable("Unexpected node to lower");
1566 const char *SystemZTargetLowering::getTargetNodeName(unsigned Opcode) const {
1567 #define OPCODE(NAME) case SystemZISD::NAME: return "SystemZISD::" #NAME
1571 OPCODE(PCREL_WRAPPER);
1575 OPCODE(SELECT_CCMASK);
1576 OPCODE(ADJDYNALLOC);
1577 OPCODE(EXTRACT_ACCESS);
1578 OPCODE(UMUL_LOHI64);
1582 OPCODE(ATOMIC_SWAPW);
1583 OPCODE(ATOMIC_LOADW_ADD);
1584 OPCODE(ATOMIC_LOADW_SUB);
1585 OPCODE(ATOMIC_LOADW_AND);
1586 OPCODE(ATOMIC_LOADW_OR);
1587 OPCODE(ATOMIC_LOADW_XOR);
1588 OPCODE(ATOMIC_LOADW_NAND);
1589 OPCODE(ATOMIC_LOADW_MIN);
1590 OPCODE(ATOMIC_LOADW_MAX);
1591 OPCODE(ATOMIC_LOADW_UMIN);
1592 OPCODE(ATOMIC_LOADW_UMAX);
1593 OPCODE(ATOMIC_CMP_SWAPW);
1599 //===----------------------------------------------------------------------===//
1601 //===----------------------------------------------------------------------===//
1603 // Create a new basic block after MBB.
1604 static MachineBasicBlock *emitBlockAfter(MachineBasicBlock *MBB) {
1605 MachineFunction &MF = *MBB->getParent();
1606 MachineBasicBlock *NewMBB = MF.CreateMachineBasicBlock(MBB->getBasicBlock());
1607 MF.insert(llvm::next(MachineFunction::iterator(MBB)), NewMBB);
1611 // Split MBB after MI and return the new block (the one that contains
1612 // instructions after MI).
1613 static MachineBasicBlock *splitBlockAfter(MachineInstr *MI,
1614 MachineBasicBlock *MBB) {
1615 MachineBasicBlock *NewMBB = emitBlockAfter(MBB);
1616 NewMBB->splice(NewMBB->begin(), MBB,
1617 llvm::next(MachineBasicBlock::iterator(MI)),
1619 NewMBB->transferSuccessorsAndUpdatePHIs(MBB);
1623 bool SystemZTargetLowering::
1624 convertPrevCompareToBranch(MachineBasicBlock *MBB,
1625 MachineBasicBlock::iterator MBBI,
1626 unsigned CCMask, MachineBasicBlock *Target) const {
1627 MachineBasicBlock::iterator Compare = MBBI;
1628 MachineBasicBlock::iterator Begin = MBB->begin();
1631 if (Compare == Begin)
1635 while (Compare->isDebugValue());
1637 const SystemZInstrInfo *TII = TM.getInstrInfo();
1638 unsigned FusedOpcode = TII->getCompareAndBranch(Compare->getOpcode(),
1643 DebugLoc DL = Compare->getDebugLoc();
1644 BuildMI(*MBB, MBBI, DL, TII->get(FusedOpcode))
1645 .addOperand(Compare->getOperand(0)).addOperand(Compare->getOperand(1))
1646 .addImm(CCMask).addMBB(Target);
1647 Compare->removeFromParent();
1651 // Implement EmitInstrWithCustomInserter for pseudo Select* instruction MI.
1653 SystemZTargetLowering::emitSelect(MachineInstr *MI,
1654 MachineBasicBlock *MBB) const {
1655 const SystemZInstrInfo *TII = TM.getInstrInfo();
1657 unsigned DestReg = MI->getOperand(0).getReg();
1658 unsigned TrueReg = MI->getOperand(1).getReg();
1659 unsigned FalseReg = MI->getOperand(2).getReg();
1660 unsigned CCMask = MI->getOperand(3).getImm();
1661 DebugLoc DL = MI->getDebugLoc();
1663 MachineBasicBlock *StartMBB = MBB;
1664 MachineBasicBlock *JoinMBB = splitBlockAfter(MI, MBB);
1665 MachineBasicBlock *FalseMBB = emitBlockAfter(StartMBB);
1668 // BRC CCMask, JoinMBB
1669 // # fallthrough to FalseMBB
1671 // The original DAG glues comparisons to their uses, both to ensure
1672 // that no CC-clobbering instructions are inserted between them, and
1673 // to ensure that comparison results are not reused. This means that
1674 // this Select is the sole user of any preceding comparison instruction
1675 // and that we can try to use a fused compare and branch instead.
1677 if (!convertPrevCompareToBranch(MBB, MI, CCMask, JoinMBB))
1678 BuildMI(MBB, DL, TII->get(SystemZ::BRC)).addImm(CCMask).addMBB(JoinMBB);
1679 MBB->addSuccessor(JoinMBB);
1680 MBB->addSuccessor(FalseMBB);
1683 // # fallthrough to JoinMBB
1685 MBB->addSuccessor(JoinMBB);
1688 // %Result = phi [ %FalseReg, FalseMBB ], [ %TrueReg, StartMBB ]
1691 BuildMI(*MBB, MBB->begin(), DL, TII->get(SystemZ::PHI), DestReg)
1692 .addReg(TrueReg).addMBB(StartMBB)
1693 .addReg(FalseReg).addMBB(FalseMBB);
1695 MI->eraseFromParent();
1699 // Implement EmitInstrWithCustomInserter for pseudo CondStore* instruction MI.
1700 // StoreOpcode is the store to use and Invert says whether the store should
1701 // happen when the condition is false rather than true.
1703 SystemZTargetLowering::emitCondStore(MachineInstr *MI,
1704 MachineBasicBlock *MBB,
1705 unsigned StoreOpcode, bool Invert) const {
1706 const SystemZInstrInfo *TII = TM.getInstrInfo();
1708 MachineOperand Base = MI->getOperand(0);
1709 int64_t Disp = MI->getOperand(1).getImm();
1710 unsigned IndexReg = MI->getOperand(2).getReg();
1711 unsigned SrcReg = MI->getOperand(3).getReg();
1712 unsigned CCMask = MI->getOperand(4).getImm();
1713 DebugLoc DL = MI->getDebugLoc();
1715 StoreOpcode = TII->getOpcodeForOffset(StoreOpcode, Disp);
1717 // Get the condition needed to branch around the store.
1719 CCMask = CCMask ^ SystemZ::CCMASK_ANY;
1721 MachineBasicBlock *StartMBB = MBB;
1722 MachineBasicBlock *JoinMBB = splitBlockAfter(MI, MBB);
1723 MachineBasicBlock *FalseMBB = emitBlockAfter(StartMBB);
1726 // BRC CCMask, JoinMBB
1727 // # fallthrough to FalseMBB
1729 // The original DAG glues comparisons to their uses, both to ensure
1730 // that no CC-clobbering instructions are inserted between them, and
1731 // to ensure that comparison results are not reused. This means that
1732 // this CondStore is the sole user of any preceding comparison instruction
1733 // and that we can try to use a fused compare and branch instead.
1735 if (!convertPrevCompareToBranch(MBB, MI, CCMask, JoinMBB))
1736 BuildMI(MBB, DL, TII->get(SystemZ::BRC)).addImm(CCMask).addMBB(JoinMBB);
1737 MBB->addSuccessor(JoinMBB);
1738 MBB->addSuccessor(FalseMBB);
1741 // store %SrcReg, %Disp(%Index,%Base)
1742 // # fallthrough to JoinMBB
1744 BuildMI(MBB, DL, TII->get(StoreOpcode))
1745 .addReg(SrcReg).addOperand(Base).addImm(Disp).addReg(IndexReg);
1746 MBB->addSuccessor(JoinMBB);
1748 MI->eraseFromParent();
1752 // Implement EmitInstrWithCustomInserter for pseudo ATOMIC_LOAD{,W}_*
1753 // or ATOMIC_SWAP{,W} instruction MI. BinOpcode is the instruction that
1754 // performs the binary operation elided by "*", or 0 for ATOMIC_SWAP{,W}.
1755 // BitSize is the width of the field in bits, or 0 if this is a partword
1756 // ATOMIC_LOADW_* or ATOMIC_SWAPW instruction, in which case the bitsize
1757 // is one of the operands. Invert says whether the field should be
1758 // inverted after performing BinOpcode (e.g. for NAND).
1760 SystemZTargetLowering::emitAtomicLoadBinary(MachineInstr *MI,
1761 MachineBasicBlock *MBB,
1764 bool Invert) const {
1765 const SystemZInstrInfo *TII = TM.getInstrInfo();
1766 MachineFunction &MF = *MBB->getParent();
1767 MachineRegisterInfo &MRI = MF.getRegInfo();
1768 unsigned MaskNE = CCMaskForCondCode(ISD::SETNE);
1769 bool IsSubWord = (BitSize < 32);
1771 // Extract the operands. Base can be a register or a frame index.
1772 // Src2 can be a register or immediate.
1773 unsigned Dest = MI->getOperand(0).getReg();
1774 MachineOperand Base = earlyUseOperand(MI->getOperand(1));
1775 int64_t Disp = MI->getOperand(2).getImm();
1776 MachineOperand Src2 = earlyUseOperand(MI->getOperand(3));
1777 unsigned BitShift = (IsSubWord ? MI->getOperand(4).getReg() : 0);
1778 unsigned NegBitShift = (IsSubWord ? MI->getOperand(5).getReg() : 0);
1779 DebugLoc DL = MI->getDebugLoc();
1781 BitSize = MI->getOperand(6).getImm();
1783 // Subword operations use 32-bit registers.
1784 const TargetRegisterClass *RC = (BitSize <= 32 ?
1785 &SystemZ::GR32BitRegClass :
1786 &SystemZ::GR64BitRegClass);
1787 unsigned LOpcode = BitSize <= 32 ? SystemZ::L : SystemZ::LG;
1788 unsigned CSOpcode = BitSize <= 32 ? SystemZ::CS : SystemZ::CSG;
1790 // Get the right opcodes for the displacement.
1791 LOpcode = TII->getOpcodeForOffset(LOpcode, Disp);
1792 CSOpcode = TII->getOpcodeForOffset(CSOpcode, Disp);
1793 assert(LOpcode && CSOpcode && "Displacement out of range");
1795 // Create virtual registers for temporary results.
1796 unsigned OrigVal = MRI.createVirtualRegister(RC);
1797 unsigned OldVal = MRI.createVirtualRegister(RC);
1798 unsigned NewVal = (BinOpcode || IsSubWord ?
1799 MRI.createVirtualRegister(RC) : Src2.getReg());
1800 unsigned RotatedOldVal = (IsSubWord ? MRI.createVirtualRegister(RC) : OldVal);
1801 unsigned RotatedNewVal = (IsSubWord ? MRI.createVirtualRegister(RC) : NewVal);
1803 // Insert a basic block for the main loop.
1804 MachineBasicBlock *StartMBB = MBB;
1805 MachineBasicBlock *DoneMBB = splitBlockAfter(MI, MBB);
1806 MachineBasicBlock *LoopMBB = emitBlockAfter(StartMBB);
1810 // %OrigVal = L Disp(%Base)
1811 // # fall through to LoopMMB
1813 BuildMI(MBB, DL, TII->get(LOpcode), OrigVal)
1814 .addOperand(Base).addImm(Disp).addReg(0);
1815 MBB->addSuccessor(LoopMBB);
1818 // %OldVal = phi [ %OrigVal, StartMBB ], [ %Dest, LoopMBB ]
1819 // %RotatedOldVal = RLL %OldVal, 0(%BitShift)
1820 // %RotatedNewVal = OP %RotatedOldVal, %Src2
1821 // %NewVal = RLL %RotatedNewVal, 0(%NegBitShift)
1822 // %Dest = CS %OldVal, %NewVal, Disp(%Base)
1824 // # fall through to DoneMMB
1826 BuildMI(MBB, DL, TII->get(SystemZ::PHI), OldVal)
1827 .addReg(OrigVal).addMBB(StartMBB)
1828 .addReg(Dest).addMBB(LoopMBB);
1830 BuildMI(MBB, DL, TII->get(SystemZ::RLL), RotatedOldVal)
1831 .addReg(OldVal).addReg(BitShift).addImm(0);
1833 // Perform the operation normally and then invert every bit of the field.
1834 unsigned Tmp = MRI.createVirtualRegister(RC);
1835 BuildMI(MBB, DL, TII->get(BinOpcode), Tmp)
1836 .addReg(RotatedOldVal).addOperand(Src2);
1838 // XILF with the upper BitSize bits set.
1839 BuildMI(MBB, DL, TII->get(SystemZ::XILF32), RotatedNewVal)
1840 .addReg(Tmp).addImm(uint32_t(~0 << (32 - BitSize)));
1841 else if (BitSize == 32)
1842 // XILF with every bit set.
1843 BuildMI(MBB, DL, TII->get(SystemZ::XILF32), RotatedNewVal)
1844 .addReg(Tmp).addImm(~uint32_t(0));
1846 // Use LCGR and add -1 to the result, which is more compact than
1847 // an XILF, XILH pair.
1848 unsigned Tmp2 = MRI.createVirtualRegister(RC);
1849 BuildMI(MBB, DL, TII->get(SystemZ::LCGR), Tmp2).addReg(Tmp);
1850 BuildMI(MBB, DL, TII->get(SystemZ::AGHI), RotatedNewVal)
1851 .addReg(Tmp2).addImm(-1);
1853 } else if (BinOpcode)
1854 // A simply binary operation.
1855 BuildMI(MBB, DL, TII->get(BinOpcode), RotatedNewVal)
1856 .addReg(RotatedOldVal).addOperand(Src2);
1858 // Use RISBG to rotate Src2 into position and use it to replace the
1859 // field in RotatedOldVal.
1860 BuildMI(MBB, DL, TII->get(SystemZ::RISBG32), RotatedNewVal)
1861 .addReg(RotatedOldVal).addReg(Src2.getReg())
1862 .addImm(32).addImm(31 + BitSize).addImm(32 - BitSize);
1864 BuildMI(MBB, DL, TII->get(SystemZ::RLL), NewVal)
1865 .addReg(RotatedNewVal).addReg(NegBitShift).addImm(0);
1866 BuildMI(MBB, DL, TII->get(CSOpcode), Dest)
1867 .addReg(OldVal).addReg(NewVal).addOperand(Base).addImm(Disp);
1868 BuildMI(MBB, DL, TII->get(SystemZ::BRC)).addImm(MaskNE).addMBB(LoopMBB);
1869 MBB->addSuccessor(LoopMBB);
1870 MBB->addSuccessor(DoneMBB);
1872 MI->eraseFromParent();
1876 // Implement EmitInstrWithCustomInserter for pseudo
1877 // ATOMIC_LOAD{,W}_{,U}{MIN,MAX} instruction MI. CompareOpcode is the
1878 // instruction that should be used to compare the current field with the
1879 // minimum or maximum value. KeepOldMask is the BRC condition-code mask
1880 // for when the current field should be kept. BitSize is the width of
1881 // the field in bits, or 0 if this is a partword ATOMIC_LOADW_* instruction.
1883 SystemZTargetLowering::emitAtomicLoadMinMax(MachineInstr *MI,
1884 MachineBasicBlock *MBB,
1885 unsigned CompareOpcode,
1886 unsigned KeepOldMask,
1887 unsigned BitSize) const {
1888 const SystemZInstrInfo *TII = TM.getInstrInfo();
1889 MachineFunction &MF = *MBB->getParent();
1890 MachineRegisterInfo &MRI = MF.getRegInfo();
1891 unsigned MaskNE = CCMaskForCondCode(ISD::SETNE);
1892 bool IsSubWord = (BitSize < 32);
1894 // Extract the operands. Base can be a register or a frame index.
1895 unsigned Dest = MI->getOperand(0).getReg();
1896 MachineOperand Base = earlyUseOperand(MI->getOperand(1));
1897 int64_t Disp = MI->getOperand(2).getImm();
1898 unsigned Src2 = MI->getOperand(3).getReg();
1899 unsigned BitShift = (IsSubWord ? MI->getOperand(4).getReg() : 0);
1900 unsigned NegBitShift = (IsSubWord ? MI->getOperand(5).getReg() : 0);
1901 DebugLoc DL = MI->getDebugLoc();
1903 BitSize = MI->getOperand(6).getImm();
1905 // Subword operations use 32-bit registers.
1906 const TargetRegisterClass *RC = (BitSize <= 32 ?
1907 &SystemZ::GR32BitRegClass :
1908 &SystemZ::GR64BitRegClass);
1909 unsigned LOpcode = BitSize <= 32 ? SystemZ::L : SystemZ::LG;
1910 unsigned CSOpcode = BitSize <= 32 ? SystemZ::CS : SystemZ::CSG;
1912 // Get the right opcodes for the displacement.
1913 LOpcode = TII->getOpcodeForOffset(LOpcode, Disp);
1914 CSOpcode = TII->getOpcodeForOffset(CSOpcode, Disp);
1915 assert(LOpcode && CSOpcode && "Displacement out of range");
1917 // Create virtual registers for temporary results.
1918 unsigned OrigVal = MRI.createVirtualRegister(RC);
1919 unsigned OldVal = MRI.createVirtualRegister(RC);
1920 unsigned NewVal = MRI.createVirtualRegister(RC);
1921 unsigned RotatedOldVal = (IsSubWord ? MRI.createVirtualRegister(RC) : OldVal);
1922 unsigned RotatedAltVal = (IsSubWord ? MRI.createVirtualRegister(RC) : Src2);
1923 unsigned RotatedNewVal = (IsSubWord ? MRI.createVirtualRegister(RC) : NewVal);
1925 // Insert 3 basic blocks for the loop.
1926 MachineBasicBlock *StartMBB = MBB;
1927 MachineBasicBlock *DoneMBB = splitBlockAfter(MI, MBB);
1928 MachineBasicBlock *LoopMBB = emitBlockAfter(StartMBB);
1929 MachineBasicBlock *UseAltMBB = emitBlockAfter(LoopMBB);
1930 MachineBasicBlock *UpdateMBB = emitBlockAfter(UseAltMBB);
1934 // %OrigVal = L Disp(%Base)
1935 // # fall through to LoopMMB
1937 BuildMI(MBB, DL, TII->get(LOpcode), OrigVal)
1938 .addOperand(Base).addImm(Disp).addReg(0);
1939 MBB->addSuccessor(LoopMBB);
1942 // %OldVal = phi [ %OrigVal, StartMBB ], [ %Dest, UpdateMBB ]
1943 // %RotatedOldVal = RLL %OldVal, 0(%BitShift)
1944 // CompareOpcode %RotatedOldVal, %Src2
1945 // BRC KeepOldMask, UpdateMBB
1947 BuildMI(MBB, DL, TII->get(SystemZ::PHI), OldVal)
1948 .addReg(OrigVal).addMBB(StartMBB)
1949 .addReg(Dest).addMBB(UpdateMBB);
1951 BuildMI(MBB, DL, TII->get(SystemZ::RLL), RotatedOldVal)
1952 .addReg(OldVal).addReg(BitShift).addImm(0);
1953 unsigned FusedOpcode = TII->getCompareAndBranch(CompareOpcode);
1955 BuildMI(MBB, DL, TII->get(FusedOpcode))
1956 .addReg(RotatedOldVal).addReg(Src2)
1957 .addImm(KeepOldMask).addMBB(UpdateMBB);
1959 BuildMI(MBB, DL, TII->get(CompareOpcode))
1960 .addReg(RotatedOldVal).addReg(Src2);
1961 BuildMI(MBB, DL, TII->get(SystemZ::BRC))
1962 .addImm(KeepOldMask).addMBB(UpdateMBB);
1964 MBB->addSuccessor(UpdateMBB);
1965 MBB->addSuccessor(UseAltMBB);
1968 // %RotatedAltVal = RISBG %RotatedOldVal, %Src2, 32, 31 + BitSize, 0
1969 // # fall through to UpdateMMB
1972 BuildMI(MBB, DL, TII->get(SystemZ::RISBG32), RotatedAltVal)
1973 .addReg(RotatedOldVal).addReg(Src2)
1974 .addImm(32).addImm(31 + BitSize).addImm(0);
1975 MBB->addSuccessor(UpdateMBB);
1978 // %RotatedNewVal = PHI [ %RotatedOldVal, LoopMBB ],
1979 // [ %RotatedAltVal, UseAltMBB ]
1980 // %NewVal = RLL %RotatedNewVal, 0(%NegBitShift)
1981 // %Dest = CS %OldVal, %NewVal, Disp(%Base)
1983 // # fall through to DoneMMB
1985 BuildMI(MBB, DL, TII->get(SystemZ::PHI), RotatedNewVal)
1986 .addReg(RotatedOldVal).addMBB(LoopMBB)
1987 .addReg(RotatedAltVal).addMBB(UseAltMBB);
1989 BuildMI(MBB, DL, TII->get(SystemZ::RLL), NewVal)
1990 .addReg(RotatedNewVal).addReg(NegBitShift).addImm(0);
1991 BuildMI(MBB, DL, TII->get(CSOpcode), Dest)
1992 .addReg(OldVal).addReg(NewVal).addOperand(Base).addImm(Disp);
1993 BuildMI(MBB, DL, TII->get(SystemZ::BRC)).addImm(MaskNE).addMBB(LoopMBB);
1994 MBB->addSuccessor(LoopMBB);
1995 MBB->addSuccessor(DoneMBB);
1997 MI->eraseFromParent();
2001 // Implement EmitInstrWithCustomInserter for pseudo ATOMIC_CMP_SWAPW
2004 SystemZTargetLowering::emitAtomicCmpSwapW(MachineInstr *MI,
2005 MachineBasicBlock *MBB) const {
2006 const SystemZInstrInfo *TII = TM.getInstrInfo();
2007 MachineFunction &MF = *MBB->getParent();
2008 MachineRegisterInfo &MRI = MF.getRegInfo();
2009 unsigned MaskNE = CCMaskForCondCode(ISD::SETNE);
2011 // Extract the operands. Base can be a register or a frame index.
2012 unsigned Dest = MI->getOperand(0).getReg();
2013 MachineOperand Base = earlyUseOperand(MI->getOperand(1));
2014 int64_t Disp = MI->getOperand(2).getImm();
2015 unsigned OrigCmpVal = MI->getOperand(3).getReg();
2016 unsigned OrigSwapVal = MI->getOperand(4).getReg();
2017 unsigned BitShift = MI->getOperand(5).getReg();
2018 unsigned NegBitShift = MI->getOperand(6).getReg();
2019 int64_t BitSize = MI->getOperand(7).getImm();
2020 DebugLoc DL = MI->getDebugLoc();
2022 const TargetRegisterClass *RC = &SystemZ::GR32BitRegClass;
2024 // Get the right opcodes for the displacement.
2025 unsigned LOpcode = TII->getOpcodeForOffset(SystemZ::L, Disp);
2026 unsigned CSOpcode = TII->getOpcodeForOffset(SystemZ::CS, Disp);
2027 assert(LOpcode && CSOpcode && "Displacement out of range");
2029 // Create virtual registers for temporary results.
2030 unsigned OrigOldVal = MRI.createVirtualRegister(RC);
2031 unsigned OldVal = MRI.createVirtualRegister(RC);
2032 unsigned CmpVal = MRI.createVirtualRegister(RC);
2033 unsigned SwapVal = MRI.createVirtualRegister(RC);
2034 unsigned StoreVal = MRI.createVirtualRegister(RC);
2035 unsigned RetryOldVal = MRI.createVirtualRegister(RC);
2036 unsigned RetryCmpVal = MRI.createVirtualRegister(RC);
2037 unsigned RetrySwapVal = MRI.createVirtualRegister(RC);
2039 // Insert 2 basic blocks for the loop.
2040 MachineBasicBlock *StartMBB = MBB;
2041 MachineBasicBlock *DoneMBB = splitBlockAfter(MI, MBB);
2042 MachineBasicBlock *LoopMBB = emitBlockAfter(StartMBB);
2043 MachineBasicBlock *SetMBB = emitBlockAfter(LoopMBB);
2047 // %OrigOldVal = L Disp(%Base)
2048 // # fall through to LoopMMB
2050 BuildMI(MBB, DL, TII->get(LOpcode), OrigOldVal)
2051 .addOperand(Base).addImm(Disp).addReg(0);
2052 MBB->addSuccessor(LoopMBB);
2055 // %OldVal = phi [ %OrigOldVal, EntryBB ], [ %RetryOldVal, SetMBB ]
2056 // %CmpVal = phi [ %OrigCmpVal, EntryBB ], [ %RetryCmpVal, SetMBB ]
2057 // %SwapVal = phi [ %OrigSwapVal, EntryBB ], [ %RetrySwapVal, SetMBB ]
2058 // %Dest = RLL %OldVal, BitSize(%BitShift)
2059 // ^^ The low BitSize bits contain the field
2061 // %RetryCmpVal = RISBG32 %CmpVal, %Dest, 32, 63-BitSize, 0
2062 // ^^ Replace the upper 32-BitSize bits of the
2063 // comparison value with those that we loaded,
2064 // so that we can use a full word comparison.
2065 // CRJNE %Dest, %RetryCmpVal, DoneMBB
2066 // # Fall through to SetMBB
2068 BuildMI(MBB, DL, TII->get(SystemZ::PHI), OldVal)
2069 .addReg(OrigOldVal).addMBB(StartMBB)
2070 .addReg(RetryOldVal).addMBB(SetMBB);
2071 BuildMI(MBB, DL, TII->get(SystemZ::PHI), CmpVal)
2072 .addReg(OrigCmpVal).addMBB(StartMBB)
2073 .addReg(RetryCmpVal).addMBB(SetMBB);
2074 BuildMI(MBB, DL, TII->get(SystemZ::PHI), SwapVal)
2075 .addReg(OrigSwapVal).addMBB(StartMBB)
2076 .addReg(RetrySwapVal).addMBB(SetMBB);
2077 BuildMI(MBB, DL, TII->get(SystemZ::RLL), Dest)
2078 .addReg(OldVal).addReg(BitShift).addImm(BitSize);
2079 BuildMI(MBB, DL, TII->get(SystemZ::RISBG32), RetryCmpVal)
2080 .addReg(CmpVal).addReg(Dest).addImm(32).addImm(63 - BitSize).addImm(0);
2081 BuildMI(MBB, DL, TII->get(SystemZ::CRJ))
2082 .addReg(Dest).addReg(RetryCmpVal)
2083 .addImm(MaskNE).addMBB(DoneMBB);
2084 MBB->addSuccessor(DoneMBB);
2085 MBB->addSuccessor(SetMBB);
2088 // %RetrySwapVal = RISBG32 %SwapVal, %Dest, 32, 63-BitSize, 0
2089 // ^^ Replace the upper 32-BitSize bits of the new
2090 // value with those that we loaded.
2091 // %StoreVal = RLL %RetrySwapVal, -BitSize(%NegBitShift)
2092 // ^^ Rotate the new field to its proper position.
2093 // %RetryOldVal = CS %Dest, %StoreVal, Disp(%Base)
2095 // # fall through to ExitMMB
2097 BuildMI(MBB, DL, TII->get(SystemZ::RISBG32), RetrySwapVal)
2098 .addReg(SwapVal).addReg(Dest).addImm(32).addImm(63 - BitSize).addImm(0);
2099 BuildMI(MBB, DL, TII->get(SystemZ::RLL), StoreVal)
2100 .addReg(RetrySwapVal).addReg(NegBitShift).addImm(-BitSize);
2101 BuildMI(MBB, DL, TII->get(CSOpcode), RetryOldVal)
2102 .addReg(OldVal).addReg(StoreVal).addOperand(Base).addImm(Disp);
2103 BuildMI(MBB, DL, TII->get(SystemZ::BRC)).addImm(MaskNE).addMBB(LoopMBB);
2104 MBB->addSuccessor(LoopMBB);
2105 MBB->addSuccessor(DoneMBB);
2107 MI->eraseFromParent();
2111 // Emit an extension from a GR32 or GR64 to a GR128. ClearEven is true
2112 // if the high register of the GR128 value must be cleared or false if
2113 // it's "don't care". SubReg is subreg_odd32 when extending a GR32
2114 // and subreg_odd when extending a GR64.
2116 SystemZTargetLowering::emitExt128(MachineInstr *MI,
2117 MachineBasicBlock *MBB,
2118 bool ClearEven, unsigned SubReg) const {
2119 const SystemZInstrInfo *TII = TM.getInstrInfo();
2120 MachineFunction &MF = *MBB->getParent();
2121 MachineRegisterInfo &MRI = MF.getRegInfo();
2122 DebugLoc DL = MI->getDebugLoc();
2124 unsigned Dest = MI->getOperand(0).getReg();
2125 unsigned Src = MI->getOperand(1).getReg();
2126 unsigned In128 = MRI.createVirtualRegister(&SystemZ::GR128BitRegClass);
2128 BuildMI(*MBB, MI, DL, TII->get(TargetOpcode::IMPLICIT_DEF), In128);
2130 unsigned NewIn128 = MRI.createVirtualRegister(&SystemZ::GR128BitRegClass);
2131 unsigned Zero64 = MRI.createVirtualRegister(&SystemZ::GR64BitRegClass);
2133 BuildMI(*MBB, MI, DL, TII->get(SystemZ::LLILL), Zero64)
2135 BuildMI(*MBB, MI, DL, TII->get(TargetOpcode::INSERT_SUBREG), NewIn128)
2136 .addReg(In128).addReg(Zero64).addImm(SystemZ::subreg_high);
2139 BuildMI(*MBB, MI, DL, TII->get(TargetOpcode::INSERT_SUBREG), Dest)
2140 .addReg(In128).addReg(Src).addImm(SubReg);
2142 MI->eraseFromParent();
2146 MachineBasicBlock *SystemZTargetLowering::
2147 EmitInstrWithCustomInserter(MachineInstr *MI, MachineBasicBlock *MBB) const {
2148 switch (MI->getOpcode()) {
2149 case SystemZ::Select32:
2150 case SystemZ::SelectF32:
2151 case SystemZ::Select64:
2152 case SystemZ::SelectF64:
2153 case SystemZ::SelectF128:
2154 return emitSelect(MI, MBB);
2156 case SystemZ::CondStore8_32:
2157 return emitCondStore(MI, MBB, SystemZ::STC32, false);
2158 case SystemZ::CondStore8_32Inv:
2159 return emitCondStore(MI, MBB, SystemZ::STC32, true);
2160 case SystemZ::CondStore16_32:
2161 return emitCondStore(MI, MBB, SystemZ::STH32, false);
2162 case SystemZ::CondStore16_32Inv:
2163 return emitCondStore(MI, MBB, SystemZ::STH32, true);
2164 case SystemZ::CondStore32_32:
2165 return emitCondStore(MI, MBB, SystemZ::ST32, false);
2166 case SystemZ::CondStore32_32Inv:
2167 return emitCondStore(MI, MBB, SystemZ::ST32, true);
2168 case SystemZ::CondStore8:
2169 return emitCondStore(MI, MBB, SystemZ::STC, false);
2170 case SystemZ::CondStore8Inv:
2171 return emitCondStore(MI, MBB, SystemZ::STC, true);
2172 case SystemZ::CondStore16:
2173 return emitCondStore(MI, MBB, SystemZ::STH, false);
2174 case SystemZ::CondStore16Inv:
2175 return emitCondStore(MI, MBB, SystemZ::STH, true);
2176 case SystemZ::CondStore32:
2177 return emitCondStore(MI, MBB, SystemZ::ST, false);
2178 case SystemZ::CondStore32Inv:
2179 return emitCondStore(MI, MBB, SystemZ::ST, true);
2180 case SystemZ::CondStore64:
2181 return emitCondStore(MI, MBB, SystemZ::STG, false);
2182 case SystemZ::CondStore64Inv:
2183 return emitCondStore(MI, MBB, SystemZ::STG, true);
2184 case SystemZ::CondStoreF32:
2185 return emitCondStore(MI, MBB, SystemZ::STE, false);
2186 case SystemZ::CondStoreF32Inv:
2187 return emitCondStore(MI, MBB, SystemZ::STE, true);
2188 case SystemZ::CondStoreF64:
2189 return emitCondStore(MI, MBB, SystemZ::STD, false);
2190 case SystemZ::CondStoreF64Inv:
2191 return emitCondStore(MI, MBB, SystemZ::STD, true);
2193 case SystemZ::AEXT128_64:
2194 return emitExt128(MI, MBB, false, SystemZ::subreg_low);
2195 case SystemZ::ZEXT128_32:
2196 return emitExt128(MI, MBB, true, SystemZ::subreg_low32);
2197 case SystemZ::ZEXT128_64:
2198 return emitExt128(MI, MBB, true, SystemZ::subreg_low);
2200 case SystemZ::ATOMIC_SWAPW:
2201 return emitAtomicLoadBinary(MI, MBB, 0, 0);
2202 case SystemZ::ATOMIC_SWAP_32:
2203 return emitAtomicLoadBinary(MI, MBB, 0, 32);
2204 case SystemZ::ATOMIC_SWAP_64:
2205 return emitAtomicLoadBinary(MI, MBB, 0, 64);
2207 case SystemZ::ATOMIC_LOADW_AR:
2208 return emitAtomicLoadBinary(MI, MBB, SystemZ::AR, 0);
2209 case SystemZ::ATOMIC_LOADW_AFI:
2210 return emitAtomicLoadBinary(MI, MBB, SystemZ::AFI, 0);
2211 case SystemZ::ATOMIC_LOAD_AR:
2212 return emitAtomicLoadBinary(MI, MBB, SystemZ::AR, 32);
2213 case SystemZ::ATOMIC_LOAD_AHI:
2214 return emitAtomicLoadBinary(MI, MBB, SystemZ::AHI, 32);
2215 case SystemZ::ATOMIC_LOAD_AFI:
2216 return emitAtomicLoadBinary(MI, MBB, SystemZ::AFI, 32);
2217 case SystemZ::ATOMIC_LOAD_AGR:
2218 return emitAtomicLoadBinary(MI, MBB, SystemZ::AGR, 64);
2219 case SystemZ::ATOMIC_LOAD_AGHI:
2220 return emitAtomicLoadBinary(MI, MBB, SystemZ::AGHI, 64);
2221 case SystemZ::ATOMIC_LOAD_AGFI:
2222 return emitAtomicLoadBinary(MI, MBB, SystemZ::AGFI, 64);
2224 case SystemZ::ATOMIC_LOADW_SR:
2225 return emitAtomicLoadBinary(MI, MBB, SystemZ::SR, 0);
2226 case SystemZ::ATOMIC_LOAD_SR:
2227 return emitAtomicLoadBinary(MI, MBB, SystemZ::SR, 32);
2228 case SystemZ::ATOMIC_LOAD_SGR:
2229 return emitAtomicLoadBinary(MI, MBB, SystemZ::SGR, 64);
2231 case SystemZ::ATOMIC_LOADW_NR:
2232 return emitAtomicLoadBinary(MI, MBB, SystemZ::NR, 0);
2233 case SystemZ::ATOMIC_LOADW_NILH:
2234 return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH32, 0);
2235 case SystemZ::ATOMIC_LOAD_NR:
2236 return emitAtomicLoadBinary(MI, MBB, SystemZ::NR, 32);
2237 case SystemZ::ATOMIC_LOAD_NILL32:
2238 return emitAtomicLoadBinary(MI, MBB, SystemZ::NILL32, 32);
2239 case SystemZ::ATOMIC_LOAD_NILH32:
2240 return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH32, 32);
2241 case SystemZ::ATOMIC_LOAD_NILF32:
2242 return emitAtomicLoadBinary(MI, MBB, SystemZ::NILF32, 32);
2243 case SystemZ::ATOMIC_LOAD_NGR:
2244 return emitAtomicLoadBinary(MI, MBB, SystemZ::NGR, 64);
2245 case SystemZ::ATOMIC_LOAD_NILL:
2246 return emitAtomicLoadBinary(MI, MBB, SystemZ::NILL, 64);
2247 case SystemZ::ATOMIC_LOAD_NILH:
2248 return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH, 64);
2249 case SystemZ::ATOMIC_LOAD_NIHL:
2250 return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHL, 64);
2251 case SystemZ::ATOMIC_LOAD_NIHH:
2252 return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHH, 64);
2253 case SystemZ::ATOMIC_LOAD_NILF:
2254 return emitAtomicLoadBinary(MI, MBB, SystemZ::NILF, 64);
2255 case SystemZ::ATOMIC_LOAD_NIHF:
2256 return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHF, 64);
2258 case SystemZ::ATOMIC_LOADW_OR:
2259 return emitAtomicLoadBinary(MI, MBB, SystemZ::OR, 0);
2260 case SystemZ::ATOMIC_LOADW_OILH:
2261 return emitAtomicLoadBinary(MI, MBB, SystemZ::OILH32, 0);
2262 case SystemZ::ATOMIC_LOAD_OR:
2263 return emitAtomicLoadBinary(MI, MBB, SystemZ::OR, 32);
2264 case SystemZ::ATOMIC_LOAD_OILL32:
2265 return emitAtomicLoadBinary(MI, MBB, SystemZ::OILL32, 32);
2266 case SystemZ::ATOMIC_LOAD_OILH32:
2267 return emitAtomicLoadBinary(MI, MBB, SystemZ::OILH32, 32);
2268 case SystemZ::ATOMIC_LOAD_OILF32:
2269 return emitAtomicLoadBinary(MI, MBB, SystemZ::OILF32, 32);
2270 case SystemZ::ATOMIC_LOAD_OGR:
2271 return emitAtomicLoadBinary(MI, MBB, SystemZ::OGR, 64);
2272 case SystemZ::ATOMIC_LOAD_OILL:
2273 return emitAtomicLoadBinary(MI, MBB, SystemZ::OILL, 64);
2274 case SystemZ::ATOMIC_LOAD_OILH:
2275 return emitAtomicLoadBinary(MI, MBB, SystemZ::OILH, 64);
2276 case SystemZ::ATOMIC_LOAD_OIHL:
2277 return emitAtomicLoadBinary(MI, MBB, SystemZ::OIHL, 64);
2278 case SystemZ::ATOMIC_LOAD_OIHH:
2279 return emitAtomicLoadBinary(MI, MBB, SystemZ::OIHH, 64);
2280 case SystemZ::ATOMIC_LOAD_OILF:
2281 return emitAtomicLoadBinary(MI, MBB, SystemZ::OILF, 64);
2282 case SystemZ::ATOMIC_LOAD_OIHF:
2283 return emitAtomicLoadBinary(MI, MBB, SystemZ::OIHF, 64);
2285 case SystemZ::ATOMIC_LOADW_XR:
2286 return emitAtomicLoadBinary(MI, MBB, SystemZ::XR, 0);
2287 case SystemZ::ATOMIC_LOADW_XILF:
2288 return emitAtomicLoadBinary(MI, MBB, SystemZ::XILF32, 0);
2289 case SystemZ::ATOMIC_LOAD_XR:
2290 return emitAtomicLoadBinary(MI, MBB, SystemZ::XR, 32);
2291 case SystemZ::ATOMIC_LOAD_XILF32:
2292 return emitAtomicLoadBinary(MI, MBB, SystemZ::XILF32, 32);
2293 case SystemZ::ATOMIC_LOAD_XGR:
2294 return emitAtomicLoadBinary(MI, MBB, SystemZ::XGR, 64);
2295 case SystemZ::ATOMIC_LOAD_XILF:
2296 return emitAtomicLoadBinary(MI, MBB, SystemZ::XILF, 64);
2297 case SystemZ::ATOMIC_LOAD_XIHF:
2298 return emitAtomicLoadBinary(MI, MBB, SystemZ::XIHF, 64);
2300 case SystemZ::ATOMIC_LOADW_NRi:
2301 return emitAtomicLoadBinary(MI, MBB, SystemZ::NR, 0, true);
2302 case SystemZ::ATOMIC_LOADW_NILHi:
2303 return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH32, 0, true);
2304 case SystemZ::ATOMIC_LOAD_NRi:
2305 return emitAtomicLoadBinary(MI, MBB, SystemZ::NR, 32, true);
2306 case SystemZ::ATOMIC_LOAD_NILL32i:
2307 return emitAtomicLoadBinary(MI, MBB, SystemZ::NILL32, 32, true);
2308 case SystemZ::ATOMIC_LOAD_NILH32i:
2309 return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH32, 32, true);
2310 case SystemZ::ATOMIC_LOAD_NILF32i:
2311 return emitAtomicLoadBinary(MI, MBB, SystemZ::NILF32, 32, true);
2312 case SystemZ::ATOMIC_LOAD_NGRi:
2313 return emitAtomicLoadBinary(MI, MBB, SystemZ::NGR, 64, true);
2314 case SystemZ::ATOMIC_LOAD_NILLi:
2315 return emitAtomicLoadBinary(MI, MBB, SystemZ::NILL, 64, true);
2316 case SystemZ::ATOMIC_LOAD_NILHi:
2317 return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH, 64, true);
2318 case SystemZ::ATOMIC_LOAD_NIHLi:
2319 return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHL, 64, true);
2320 case SystemZ::ATOMIC_LOAD_NIHHi:
2321 return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHH, 64, true);
2322 case SystemZ::ATOMIC_LOAD_NILFi:
2323 return emitAtomicLoadBinary(MI, MBB, SystemZ::NILF, 64, true);
2324 case SystemZ::ATOMIC_LOAD_NIHFi:
2325 return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHF, 64, true);
2327 case SystemZ::ATOMIC_LOADW_MIN:
2328 return emitAtomicLoadMinMax(MI, MBB, SystemZ::CR,
2329 SystemZ::CCMASK_CMP_LE, 0);
2330 case SystemZ::ATOMIC_LOAD_MIN_32:
2331 return emitAtomicLoadMinMax(MI, MBB, SystemZ::CR,
2332 SystemZ::CCMASK_CMP_LE, 32);
2333 case SystemZ::ATOMIC_LOAD_MIN_64:
2334 return emitAtomicLoadMinMax(MI, MBB, SystemZ::CGR,
2335 SystemZ::CCMASK_CMP_LE, 64);
2337 case SystemZ::ATOMIC_LOADW_MAX:
2338 return emitAtomicLoadMinMax(MI, MBB, SystemZ::CR,
2339 SystemZ::CCMASK_CMP_GE, 0);
2340 case SystemZ::ATOMIC_LOAD_MAX_32:
2341 return emitAtomicLoadMinMax(MI, MBB, SystemZ::CR,
2342 SystemZ::CCMASK_CMP_GE, 32);
2343 case SystemZ::ATOMIC_LOAD_MAX_64:
2344 return emitAtomicLoadMinMax(MI, MBB, SystemZ::CGR,
2345 SystemZ::CCMASK_CMP_GE, 64);
2347 case SystemZ::ATOMIC_LOADW_UMIN:
2348 return emitAtomicLoadMinMax(MI, MBB, SystemZ::CLR,
2349 SystemZ::CCMASK_CMP_LE, 0);
2350 case SystemZ::ATOMIC_LOAD_UMIN_32:
2351 return emitAtomicLoadMinMax(MI, MBB, SystemZ::CLR,
2352 SystemZ::CCMASK_CMP_LE, 32);
2353 case SystemZ::ATOMIC_LOAD_UMIN_64:
2354 return emitAtomicLoadMinMax(MI, MBB, SystemZ::CLGR,
2355 SystemZ::CCMASK_CMP_LE, 64);
2357 case SystemZ::ATOMIC_LOADW_UMAX:
2358 return emitAtomicLoadMinMax(MI, MBB, SystemZ::CLR,
2359 SystemZ::CCMASK_CMP_GE, 0);
2360 case SystemZ::ATOMIC_LOAD_UMAX_32:
2361 return emitAtomicLoadMinMax(MI, MBB, SystemZ::CLR,
2362 SystemZ::CCMASK_CMP_GE, 32);
2363 case SystemZ::ATOMIC_LOAD_UMAX_64:
2364 return emitAtomicLoadMinMax(MI, MBB, SystemZ::CLGR,
2365 SystemZ::CCMASK_CMP_GE, 64);
2367 case SystemZ::ATOMIC_CMP_SWAPW:
2368 return emitAtomicCmpSwapW(MI, MBB);
2370 // The original DAG glues comparisons to their uses, both to ensure
2371 // that no CC-clobbering instructions are inserted between them, and
2372 // to ensure that comparison results are not reused. This means that
2373 // a BRC is the sole user of a preceding comparison and that we can
2374 // try to use a fused compare and branch instead.
2375 if (convertPrevCompareToBranch(MBB, MI, MI->getOperand(0).getImm(),
2376 MI->getOperand(1).getMBB()))
2377 MI->eraseFromParent();
2380 llvm_unreachable("Unexpected instr type to insert");