//===-- SystemZCallingConv.h - Calling conventions for SystemZ --*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZCALLINGCONV_H #define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZCALLINGCONV_H #include "llvm/ADT/SmallVector.h" #include "llvm/CodeGen/CallingConvLower.h" namespace llvm { namespace SystemZ { const unsigned NumArgGPRs = 5; extern const unsigned ArgGPRs[NumArgGPRs]; const unsigned NumArgFPRs = 4; extern const unsigned ArgFPRs[NumArgFPRs]; } // end namespace SystemZ class SystemZCCState : public CCState { private: /// Records whether the value was a fixed argument. /// See ISD::OutputArg::IsFixed. SmallVector<bool, 4> ArgIsFixed; /// Records whether the value was widened from a short vector type. SmallVector<bool, 4> ArgIsShortVector; // Check whether ArgVT is a short vector type. bool IsShortVectorType(EVT ArgVT) { return ArgVT.isVector() && ArgVT.getStoreSize() <= 8; } public: SystemZCCState(CallingConv::ID CC, bool isVarArg, MachineFunction &MF, SmallVectorImpl<CCValAssign> &locs, LLVMContext &C) : CCState(CC, isVarArg, MF, locs, C) {} void AnalyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Ins, CCAssignFn Fn) { // Formal arguments are always fixed. ArgIsFixed.clear(); for (unsigned i = 0; i < Ins.size(); ++i) ArgIsFixed.push_back(true); // Record whether the call operand was a short vector. ArgIsShortVector.clear(); for (unsigned i = 0; i < Ins.size(); ++i) ArgIsShortVector.push_back(IsShortVectorType(Ins[i].ArgVT)); CCState::AnalyzeFormalArguments(Ins, Fn); } void AnalyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs, CCAssignFn Fn) { // Record whether the call operand was a fixed argument. ArgIsFixed.clear(); for (unsigned i = 0; i < Outs.size(); ++i) ArgIsFixed.push_back(Outs[i].IsFixed); // Record whether the call operand was a short vector. ArgIsShortVector.clear(); for (unsigned i = 0; i < Outs.size(); ++i) ArgIsShortVector.push_back(IsShortVectorType(Outs[i].ArgVT)); CCState::AnalyzeCallOperands(Outs, Fn); } // This version of AnalyzeCallOperands in the base class is not usable // since we must provide a means of accessing ISD::OutputArg::IsFixed. void AnalyzeCallOperands(const SmallVectorImpl<MVT> &Outs, SmallVectorImpl<ISD::ArgFlagsTy> &Flags, CCAssignFn Fn) = delete; bool IsFixed(unsigned ValNo) { return ArgIsFixed[ValNo]; } bool IsShortVector(unsigned ValNo) { return ArgIsShortVector[ValNo]; } }; } // end namespace llvm #endif