1 //===-- SystemZCallingConv.h - Calling conventions for SystemZ --*- C++ -*-===//
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 #ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZCALLINGCONV_H
11 #define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZCALLINGCONV_H
13 #include "llvm/ADT/SmallVector.h"
14 #include "llvm/CodeGen/CallingConvLower.h"
18 const unsigned NumArgGPRs = 5;
19 extern const unsigned ArgGPRs[NumArgGPRs];
21 const unsigned NumArgFPRs = 4;
22 extern const unsigned ArgFPRs[NumArgFPRs];
23 } // end namespace SystemZ
25 class SystemZCCState : public CCState {
27 /// Records whether the value was a fixed argument.
28 /// See ISD::OutputArg::IsFixed.
29 SmallVector<bool, 4> ArgIsFixed;
32 SystemZCCState(CallingConv::ID CC, bool isVarArg, MachineFunction &MF,
33 SmallVectorImpl<CCValAssign> &locs, LLVMContext &C)
34 : CCState(CC, isVarArg, MF, locs, C) {}
36 void AnalyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Ins,
38 // Formal arguments are always fixed.
40 for (unsigned i = 0; i < Ins.size(); ++i)
41 ArgIsFixed.push_back(true);
43 CCState::AnalyzeFormalArguments(Ins, Fn);
46 void AnalyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs,
48 // Record whether the call operand was a fixed argument.
50 for (unsigned i = 0; i < Outs.size(); ++i)
51 ArgIsFixed.push_back(Outs[i].IsFixed);
53 CCState::AnalyzeCallOperands(Outs, Fn);
56 // This version of AnalyzeCallOperands in the base class is not usable
57 // since we must provide a means of accessing ISD::OutputArg::IsFixed.
58 void AnalyzeCallOperands(const SmallVectorImpl<MVT> &Outs,
59 SmallVectorImpl<ISD::ArgFlagsTy> &Flags,
60 CCAssignFn Fn) = delete;
62 bool IsFixed(unsigned ValNo) { return ArgIsFixed[ValNo]; }
65 } // end namespace llvm