1 //===-- CSKYISelLowering.cpp - CSKY DAG Lowering Implementation  ----------===//
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
12 //===----------------------------------------------------------------------===//
28 #define DEBUG_TYPE "csky-isel-lowering"
120       ISD::FSIN, ISD::FCOS,      ISD::FSINCOS,    ISD::FPOW,  in CSKYTargetLowering()
380     // large enough to hold a0-a4.  in LowerFormalArguments()
389       VarArgsSaveSize = XLenInBytes * (ArgRegs.size() - Idx);  in LowerFormalArguments()
390       VaArgOffset = -VarArgsSaveSize;  in LowerFormalArguments()
396     CSKYFI->setVarArgsFrameIndex(FI);  in LowerFormalArguments()
410           ->getMemOperand()  in LowerFormalArguments()
411           ->setValue((Value *)nullptr);  in LowerFormalArguments()
414     CSKYFI->setVarArgsSaveSize(VarArgsSaveSize);  in LowerFormalArguments()
452   // Copy the result values into the output registers.  in LowerReturn()
504 // and output parameter nodes.
534   else if (CLI.CB && CLI.CB->isMustTailCall())  in LowerCall()
638   // Build a sequence of copy-to-reg nodes, chained and glued together.  in LowerCall()
651     const GlobalValue *GV = S->getGlobal();  in LowerCall()
686     // Add a register mask operand representing the call-preserved registers.  in LowerCall()
688     const uint32_t *Mask = TRI->getCallPreservedMask(MF, CallConv);  in LowerCall()
787       N->getGlobal(), CSKYCP::CPValue, 0, getModifier(Flags), false);  in getTargetConstantPoolValue()
860   // users of these frontends to use the ABI names for registers in LLVM-style  in getRegForInlineAsmConstraint()
943       assert(CSKY::F0_32 <= FReg && FReg <= CSKY::F31_32 && "Unknown fp-reg");  in getRegForInlineAsmConstraint()
944       unsigned RegNo = FReg - CSKY::F0_32;  in getRegForInlineAsmConstraint()
964   const TargetInstrInfo &TII = *BB->getParent()->getSubtarget().getInstrInfo();  in emitSelectPseudo()
968   // diamond control-flow pattern.  The incoming instruction knows the  in emitSelectPseudo()
971   const BasicBlock *LLVM_BB = BB->getBasicBlock();  in emitSelectPseudo()
972   MachineFunction::iterator It = ++BB->getIterator();  in emitSelectPseudo()
978   //   fallthrough --> copyMBB  in emitSelectPseudo()
980   MachineFunction *F = BB->getParent();  in emitSelectPseudo()
981   MachineBasicBlock *copyMBB = F->CreateMachineBasicBlock(LLVM_BB);  in emitSelectPseudo()
982   MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);  in emitSelectPseudo()
983   F->insert(It, copyMBB);  in emitSelectPseudo()
984   F->insert(It, sinkMBB);  in emitSelectPseudo()
987   sinkMBB->splice(sinkMBB->begin(), BB,  in emitSelectPseudo()
988                   std::next(MachineBasicBlock::iterator(MI)), BB->end());  in emitSelectPseudo()
989   sinkMBB->transferSuccessorsAndUpdatePHIs(BB);  in emitSelectPseudo()
992   BB->addSuccessor(copyMBB);  in emitSelectPseudo()
993   BB->addSuccessor(sinkMBB);  in emitSelectPseudo()
1005   // Update machine-CFG edges  in emitSelectPseudo()
1006   BB->addSuccessor(sinkMBB);  in emitSelectPseudo()
1013   BuildMI(*BB, BB->begin(), DL, TII.get(CSKY::PHI), MI.getOperand(0).getReg())  in emitSelectPseudo()
1049                                      N->getSymbol(), 0, getModifier(Flags));  in getTargetConstantPoolValue()
1060                                  N->getIndex(), 0, getModifier(Flags));  in getTargetConstantPoolValue()
1068   assert(N->getOffset() == 0);  in getTargetConstantPoolValue()
1070       N->getBlockAddress(), CSKYCP::CPBlockAddress, 0, getModifier(Flags),  in getTargetConstantPoolValue()
1079   assert(N->getOffset() == 0);  in getTargetConstantPoolValue()
1081       N->getConstVal(), Type::getInt32Ty(*DAG.getContext()),  in getTargetConstantPoolValue()
1089   return DAG.getTargetGlobalAddress(N->getGlobal(), DL, Ty, 0, Flags);  in getTargetNode()
1095   return DAG.getTargetExternalSymbol(N->getSymbol(), Ty, Flags);  in getTargetNode()
1101   return DAG.getTargetJumpTable(N->getIndex(), Ty, Flags);  in getTargetNode()
1107   return DAG.getTargetBlockAddress(N->getBlockAddress(), Ty, N->getOffset(),  in getTargetNode()
1115   return DAG.getTargetConstantPool(N->getConstVal(), Ty, N->getAlign(),  in getTargetNode()
1116                                    N->getOffset(), Flags);  in getTargetNode()
1151   int64_t Offset = N->getOffset();  in LowerGlobalAddress()
1153   const GlobalValue *GV = N->getGlobal();  in LowerGlobalAddress()
1201   SDValue FI = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),  in LowerVASTART()
1206   const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();  in LowerVASTART()
1223   while (Depth--)  in LowerFRAMEADDR()
1250   // live-in.  in LowerRETURNADDR()
1270   int64_t Offset = N->getOffset();  in LowerGlobalTLSAddress()
1273   TLSModel::Model Model = getTargetMachine().getTLSModel(N->getGlobal());  in LowerGlobalTLSAddress()
1304   unsigned CSKYPCLabelIndex = CFI->createPICLabelUId();  in getStaticTLSAddr()
1314       CSKYConstantPoolConstant::Create(N->getGlobal(), CSKYCP::CPValue, PCAjust,  in getStaticTLSAddr()
1326                        MachinePointerInfo(N->getGlobal()));  in getStaticTLSAddr()
1341   unsigned CSKYPCLabelIndex = CFI->createPICLabelUId();  in getDynamicTLSAddr()
1348       CSKYConstantPoolConstant::Create(N->getGlobal(), CSKYCP::CPValue, 4,  in getDynamicTLSAddr()
1388     const APInt &Imm = ConstNode->getAPIntValue();  in decomposeMulByConstant()
1390     if ((Imm + 1).isPowerOf2() || (Imm - 1).isPowerOf2() ||  in decomposeMulByConstant()
1391         (1 - Imm).isPowerOf2())  in decomposeMulByConstant()
1396     if (!Subtarget.hasE2() && (-1 - Imm).isPowerOf2())  in decomposeMulByConstant()
1400     if (Imm.ugt(0xffff) && ((Imm - 2).isPowerOf2() || (Imm - 4).isPowerOf2()) &&  in decomposeMulByConstant()
1403     if (Imm.ugt(0xffff) && (Imm - 8).isPowerOf2() && Subtarget.has2E3())  in decomposeMulByConstant()