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https://github.com/c64scene-ar/llvm-6502.git
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Move CallingConvLower.cpp out of the SelectionDAG directory.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107781 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
214
lib/CodeGen/CallingConvLower.cpp
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214
lib/CodeGen/CallingConvLower.cpp
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//===-- CallingConvLower.cpp - Calling Conventions ------------------------===//
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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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//
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// This file implements the CCState class, used for lowering and implementing
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// calling conventions.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/CallingConvLower.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Target/TargetRegisterInfo.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Target/TargetMachine.h"
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using namespace llvm;
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CCState::CCState(CallingConv::ID CC, bool isVarArg, const TargetMachine &tm,
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SmallVector<CCValAssign, 16> &locs, LLVMContext &C)
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: CallingConv(CC), IsVarArg(isVarArg), TM(tm),
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TRI(*TM.getRegisterInfo()), Locs(locs), Context(C) {
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// No stack is used.
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StackOffset = 0;
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UsedRegs.resize((TRI.getNumRegs()+31)/32);
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}
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// HandleByVal - Allocate a stack slot large enough to pass an argument by
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// value. The size and alignment information of the argument is encoded in its
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// parameter attribute.
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void CCState::HandleByVal(unsigned ValNo, EVT ValVT,
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EVT LocVT, CCValAssign::LocInfo LocInfo,
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int MinSize, int MinAlign,
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ISD::ArgFlagsTy ArgFlags) {
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unsigned Align = ArgFlags.getByValAlign();
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unsigned Size = ArgFlags.getByValSize();
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if (MinSize > (int)Size)
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Size = MinSize;
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if (MinAlign > (int)Align)
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Align = MinAlign;
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unsigned Offset = AllocateStack(Size, Align);
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addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
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}
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/// MarkAllocated - Mark a register and all of its aliases as allocated.
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void CCState::MarkAllocated(unsigned Reg) {
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UsedRegs[Reg/32] |= 1 << (Reg&31);
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if (const unsigned *RegAliases = TRI.getAliasSet(Reg))
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for (; (Reg = *RegAliases); ++RegAliases)
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UsedRegs[Reg/32] |= 1 << (Reg&31);
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}
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/// AnalyzeFormalArguments - Analyze an array of argument values,
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/// incorporating info about the formals into this state.
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void
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CCState::AnalyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Ins,
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CCAssignFn Fn) {
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unsigned NumArgs = Ins.size();
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for (unsigned i = 0; i != NumArgs; ++i) {
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EVT ArgVT = Ins[i].VT;
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ISD::ArgFlagsTy ArgFlags = Ins[i].Flags;
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if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
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#ifndef NDEBUG
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dbgs() << "Formal argument #" << i << " has unhandled type "
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<< ArgVT.getEVTString();
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#endif
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llvm_unreachable(0);
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}
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}
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}
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/// CheckReturn - Analyze the return values of a function, returning true if
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/// the return can be performed without sret-demotion, and false otherwise.
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bool CCState::CheckReturn(const SmallVectorImpl<EVT> &OutTys,
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const SmallVectorImpl<ISD::ArgFlagsTy> &ArgsFlags,
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CCAssignFn Fn) {
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// Determine which register each value should be copied into.
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for (unsigned i = 0, e = OutTys.size(); i != e; ++i) {
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EVT VT = OutTys[i];
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ISD::ArgFlagsTy ArgFlags = ArgsFlags[i];
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if (Fn(i, VT, VT, CCValAssign::Full, ArgFlags, *this))
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return false;
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}
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return true;
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}
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/// AnalyzeReturn - Analyze the returned values of a return,
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/// incorporating info about the result values into this state.
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void CCState::AnalyzeReturn(const SmallVectorImpl<ISD::OutputArg> &Outs,
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CCAssignFn Fn) {
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// Determine which register each value should be copied into.
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for (unsigned i = 0, e = Outs.size(); i != e; ++i) {
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EVT VT = Outs[i].Val.getValueType();
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ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
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if (Fn(i, VT, VT, CCValAssign::Full, ArgFlags, *this)) {
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#ifndef NDEBUG
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dbgs() << "Return operand #" << i << " has unhandled type "
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<< VT.getEVTString();
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#endif
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llvm_unreachable(0);
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}
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}
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}
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void CCState::AnalyzeReturn(const SmallVectorImpl<ISD::OutputArgReg> &Outs,
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CCAssignFn Fn) {
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// Determine which register each value should be copied into.
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for (unsigned i = 0, e = Outs.size(); i != e; ++i) {
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EVT VT = Outs[i].VT;
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ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
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if (Fn(i, VT, VT, CCValAssign::Full, ArgFlags, *this)) {
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#ifndef NDEBUG
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dbgs() << "Return operand #" << i << " has unhandled type "
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<< VT.getEVTString();
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#endif
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llvm_unreachable(0);
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}
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}
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}
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/// AnalyzeCallOperands - Analyze the outgoing arguments to a call,
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/// incorporating info about the passed values into this state.
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void CCState::AnalyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs,
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CCAssignFn Fn) {
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unsigned NumOps = Outs.size();
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for (unsigned i = 0; i != NumOps; ++i) {
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EVT ArgVT = Outs[i].Val.getValueType();
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ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
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if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
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#ifndef NDEBUG
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dbgs() << "Call operand #" << i << " has unhandled type "
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<< ArgVT.getEVTString();
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#endif
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llvm_unreachable(0);
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}
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}
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}
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/// AnalyzeCallOperands - Analyze the outgoing arguments to a call,
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/// incorporating info about the passed values into this state.
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void
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CCState::AnalyzeCallOperands(const SmallVectorImpl<ISD::OutputArgReg> &Outs,
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CCAssignFn Fn) {
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unsigned NumOps = Outs.size();
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for (unsigned i = 0; i != NumOps; ++i) {
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EVT ArgVT = Outs[i].VT;
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ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
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if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
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#ifndef NDEBUG
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dbgs() << "Call operand #" << i << " has unhandled type "
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<< ArgVT.getEVTString();
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#endif
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llvm_unreachable(0);
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}
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}
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}
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/// AnalyzeCallOperands - Same as above except it takes vectors of types
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/// and argument flags.
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void CCState::AnalyzeCallOperands(SmallVectorImpl<EVT> &ArgVTs,
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SmallVectorImpl<ISD::ArgFlagsTy> &Flags,
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CCAssignFn Fn) {
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unsigned NumOps = ArgVTs.size();
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for (unsigned i = 0; i != NumOps; ++i) {
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EVT ArgVT = ArgVTs[i];
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ISD::ArgFlagsTy ArgFlags = Flags[i];
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if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
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#ifndef NDEBUG
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dbgs() << "Call operand #" << i << " has unhandled type "
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<< ArgVT.getEVTString();
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#endif
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llvm_unreachable(0);
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}
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}
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}
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/// AnalyzeCallResult - Analyze the return values of a call,
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/// incorporating info about the passed values into this state.
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void CCState::AnalyzeCallResult(const SmallVectorImpl<ISD::InputArg> &Ins,
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CCAssignFn Fn) {
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for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
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EVT VT = Ins[i].VT;
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ISD::ArgFlagsTy Flags = Ins[i].Flags;
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if (Fn(i, VT, VT, CCValAssign::Full, Flags, *this)) {
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#ifndef NDEBUG
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dbgs() << "Call result #" << i << " has unhandled type "
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<< VT.getEVTString();
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#endif
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llvm_unreachable(0);
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}
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}
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}
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/// AnalyzeCallResult - Same as above except it's specialized for calls which
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/// produce a single value.
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void CCState::AnalyzeCallResult(EVT VT, CCAssignFn Fn) {
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if (Fn(0, VT, VT, CCValAssign::Full, ISD::ArgFlagsTy(), *this)) {
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#ifndef NDEBUG
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dbgs() << "Call result has unhandled type "
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<< VT.getEVTString();
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#endif
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llvm_unreachable(0);
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}
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}
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