137 lines
5.0 KiB
C++
137 lines
5.0 KiB
C++
//===---- MipsCCState.h - CCState with Mips specific extensions -----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MIPSCCSTATE_H
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#define MIPSCCSTATE_H
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#include "MipsISelLowering.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/CodeGen/CallingConvLower.h"
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namespace llvm {
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class SDNode;
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class MipsSubtarget;
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class MipsCCState : public CCState {
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public:
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enum SpecialCallingConvType { Mips16RetHelperConv, NoSpecialCallingConv };
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/// Determine the SpecialCallingConvType for the given callee
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static SpecialCallingConvType
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getSpecialCallingConvForCallee(const SDNode *Callee,
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const MipsSubtarget &Subtarget);
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private:
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/// Identify lowered values that originated from f128 arguments and record
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/// this for use by RetCC_MipsN.
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void PreAnalyzeCallResultForF128(const SmallVectorImpl<ISD::InputArg> &Ins,
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const TargetLowering::CallLoweringInfo &CLI);
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/// Identify lowered values that originated from f128 arguments and record
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/// this for use by RetCC_MipsN.
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void PreAnalyzeReturnForF128(const SmallVectorImpl<ISD::OutputArg> &Outs);
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/// Identify lowered values that originated from f128 arguments and record
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/// this.
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void
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PreAnalyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs,
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std::vector<TargetLowering::ArgListEntry> &FuncArgs,
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const SDNode *CallNode);
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/// Identify lowered values that originated from f128 arguments and record
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/// this.
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void
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PreAnalyzeFormalArgumentsForF128(const SmallVectorImpl<ISD::InputArg> &Ins);
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/// Records whether the value has been lowered from an f128.
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SmallVector<bool, 4> OriginalArgWasF128;
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/// Records whether the value has been lowered from float.
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SmallVector<bool, 4> OriginalArgWasFloat;
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/// Records whether the value was a fixed argument.
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/// See ISD::OutputArg::IsFixed,
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SmallVector<bool, 4> CallOperandIsFixed;
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// Used to handle MIPS16-specific calling convention tweaks.
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// FIXME: This should probably be a fully fledged calling convention.
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SpecialCallingConvType SpecialCallingConv;
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public:
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MipsCCState(CallingConv::ID CC, bool isVarArg, MachineFunction &MF,
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SmallVectorImpl<CCValAssign> &locs, LLVMContext &C,
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SpecialCallingConvType SpecialCC = NoSpecialCallingConv)
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: CCState(CC, isVarArg, MF, locs, C), SpecialCallingConv(SpecialCC) {}
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void
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AnalyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs,
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CCAssignFn Fn,
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std::vector<TargetLowering::ArgListEntry> &FuncArgs,
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const SDNode *CallNode) {
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PreAnalyzeCallOperands(Outs, FuncArgs, CallNode);
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CCState::AnalyzeCallOperands(Outs, Fn);
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OriginalArgWasF128.clear();
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OriginalArgWasFloat.clear();
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CallOperandIsFixed.clear();
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}
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// The AnalyzeCallOperands in the base class is not usable since we must
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// provide a means of accessing ArgListEntry::IsFixed. Delete them from this
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// class. This doesn't stop them being used via the base class though.
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void AnalyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs,
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CCAssignFn Fn) = delete;
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void AnalyzeCallOperands(const SmallVectorImpl<MVT> &Outs,
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SmallVectorImpl<ISD::ArgFlagsTy> &Flags,
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CCAssignFn Fn) = delete;
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void AnalyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Ins,
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CCAssignFn Fn) {
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PreAnalyzeFormalArgumentsForF128(Ins);
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CCState::AnalyzeFormalArguments(Ins, Fn);
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OriginalArgWasFloat.clear();
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OriginalArgWasF128.clear();
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}
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void AnalyzeCallResult(const SmallVectorImpl<ISD::InputArg> &Ins,
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CCAssignFn Fn,
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const TargetLowering::CallLoweringInfo &CLI) {
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PreAnalyzeCallResultForF128(Ins, CLI);
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CCState::AnalyzeCallResult(Ins, Fn);
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OriginalArgWasFloat.clear();
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OriginalArgWasF128.clear();
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}
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void AnalyzeReturn(const SmallVectorImpl<ISD::OutputArg> &Outs,
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CCAssignFn Fn) {
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PreAnalyzeReturnForF128(Outs);
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CCState::AnalyzeReturn(Outs, Fn);
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OriginalArgWasFloat.clear();
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OriginalArgWasF128.clear();
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}
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bool CheckReturn(const SmallVectorImpl<ISD::OutputArg> &ArgsFlags,
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CCAssignFn Fn) {
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PreAnalyzeReturnForF128(ArgsFlags);
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bool Return = CCState::CheckReturn(ArgsFlags, Fn);
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OriginalArgWasFloat.clear();
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OriginalArgWasF128.clear();
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return Return;
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}
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bool WasOriginalArgF128(unsigned ValNo) { return OriginalArgWasF128[ValNo]; }
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bool WasOriginalArgFloat(unsigned ValNo) {
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return OriginalArgWasFloat[ValNo];
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}
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bool IsCallOperandFixed(unsigned ValNo) { return CallOperandIsFixed[ValNo]; }
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SpecialCallingConvType getSpecialCallingConv() { return SpecialCallingConv; }
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};
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}
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#endif
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