You've already forked linux-packaging-mono
Imported Upstream version 5.18.0.247
Former-commit-id: 2d6af2e4ed0eda5cbdc2946446ef7718456ad190
This commit is contained in:
Xamarin Public Jenkins (auto-signing)
parent
279aa8f685
commit
ce8e504569
304
external/llvm/lib/CodeGen/CallingConvLower.cpp
vendored
304
external/llvm/lib/CodeGen/CallingConvLower.cpp
vendored
@ -1,304 +0,0 @@
|
||||
//===-- CallingConvLower.cpp - Calling Conventions ------------------------===//
|
||||
//
|
||||
// The LLVM Compiler Infrastructure
|
||||
//
|
||||
// This file is distributed under the University of Illinois Open Source
|
||||
// License. See LICENSE.TXT for details.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
//
|
||||
// This file implements the CCState class, used for lowering and implementing
|
||||
// calling conventions.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#include "llvm/CodeGen/CallingConvLower.h"
|
||||
#include "llvm/CodeGen/MachineFrameInfo.h"
|
||||
#include "llvm/CodeGen/MachineRegisterInfo.h"
|
||||
#include "llvm/CodeGen/TargetLowering.h"
|
||||
#include "llvm/CodeGen/TargetRegisterInfo.h"
|
||||
#include "llvm/CodeGen/TargetSubtargetInfo.h"
|
||||
#include "llvm/IR/DataLayout.h"
|
||||
#include "llvm/Support/Debug.h"
|
||||
#include "llvm/Support/ErrorHandling.h"
|
||||
#include "llvm/Support/SaveAndRestore.h"
|
||||
#include "llvm/Support/raw_ostream.h"
|
||||
#include <algorithm>
|
||||
|
||||
using namespace llvm;
|
||||
|
||||
CCState::CCState(CallingConv::ID CC, bool isVarArg, MachineFunction &mf,
|
||||
SmallVectorImpl<CCValAssign> &locs, LLVMContext &C)
|
||||
: CallingConv(CC), IsVarArg(isVarArg), MF(mf),
|
||||
TRI(*MF.getSubtarget().getRegisterInfo()), Locs(locs), Context(C) {
|
||||
// No stack is used.
|
||||
StackOffset = 0;
|
||||
MaxStackArgAlign = 1;
|
||||
|
||||
clearByValRegsInfo();
|
||||
UsedRegs.resize((TRI.getNumRegs()+31)/32);
|
||||
}
|
||||
|
||||
/// Allocate space on the stack large enough to pass an argument by value.
|
||||
/// The size and alignment information of the argument is encoded in
|
||||
/// its parameter attribute.
|
||||
void CCState::HandleByVal(unsigned ValNo, MVT ValVT,
|
||||
MVT LocVT, CCValAssign::LocInfo LocInfo,
|
||||
int MinSize, int MinAlign,
|
||||
ISD::ArgFlagsTy ArgFlags) {
|
||||
unsigned Align = ArgFlags.getByValAlign();
|
||||
unsigned Size = ArgFlags.getByValSize();
|
||||
if (MinSize > (int)Size)
|
||||
Size = MinSize;
|
||||
if (MinAlign > (int)Align)
|
||||
Align = MinAlign;
|
||||
ensureMaxAlignment(Align);
|
||||
MF.getSubtarget().getTargetLowering()->HandleByVal(this, Size, Align);
|
||||
Size = unsigned(alignTo(Size, MinAlign));
|
||||
unsigned Offset = AllocateStack(Size, Align);
|
||||
addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
|
||||
}
|
||||
|
||||
/// Mark a register and all of its aliases as allocated.
|
||||
void CCState::MarkAllocated(unsigned Reg) {
|
||||
for (MCRegAliasIterator AI(Reg, &TRI, true); AI.isValid(); ++AI)
|
||||
UsedRegs[*AI/32] |= 1 << (*AI&31);
|
||||
}
|
||||
|
||||
bool CCState::IsShadowAllocatedReg(unsigned Reg) const {
|
||||
if (!isAllocated(Reg))
|
||||
return false;
|
||||
|
||||
for (auto const &ValAssign : Locs) {
|
||||
if (ValAssign.isRegLoc()) {
|
||||
for (MCRegAliasIterator AI(ValAssign.getLocReg(), &TRI, true);
|
||||
AI.isValid(); ++AI) {
|
||||
if (*AI == Reg)
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
/// Analyze an array of argument values,
|
||||
/// incorporating info about the formals into this state.
|
||||
void
|
||||
CCState::AnalyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Ins,
|
||||
CCAssignFn Fn) {
|
||||
unsigned NumArgs = Ins.size();
|
||||
|
||||
for (unsigned i = 0; i != NumArgs; ++i) {
|
||||
MVT ArgVT = Ins[i].VT;
|
||||
ISD::ArgFlagsTy ArgFlags = Ins[i].Flags;
|
||||
if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
|
||||
#ifndef NDEBUG
|
||||
dbgs() << "Formal argument #" << i << " has unhandled type "
|
||||
<< EVT(ArgVT).getEVTString() << '\n';
|
||||
#endif
|
||||
llvm_unreachable(nullptr);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Analyze the return values of a function, returning true if the return can
|
||||
/// be performed without sret-demotion and false otherwise.
|
||||
bool CCState::CheckReturn(const SmallVectorImpl<ISD::OutputArg> &Outs,
|
||||
CCAssignFn Fn) {
|
||||
// Determine which register each value should be copied into.
|
||||
for (unsigned i = 0, e = Outs.size(); i != e; ++i) {
|
||||
MVT VT = Outs[i].VT;
|
||||
ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
|
||||
if (Fn(i, VT, VT, CCValAssign::Full, ArgFlags, *this))
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
/// Analyze the returned values of a return,
|
||||
/// incorporating info about the result values into this state.
|
||||
void CCState::AnalyzeReturn(const SmallVectorImpl<ISD::OutputArg> &Outs,
|
||||
CCAssignFn Fn) {
|
||||
// Determine which register each value should be copied into.
|
||||
for (unsigned i = 0, e = Outs.size(); i != e; ++i) {
|
||||
MVT VT = Outs[i].VT;
|
||||
ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
|
||||
if (Fn(i, VT, VT, CCValAssign::Full, ArgFlags, *this)) {
|
||||
#ifndef NDEBUG
|
||||
dbgs() << "Return operand #" << i << " has unhandled type "
|
||||
<< EVT(VT).getEVTString() << '\n';
|
||||
#endif
|
||||
llvm_unreachable(nullptr);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Analyze the outgoing arguments to a call,
|
||||
/// incorporating info about the passed values into this state.
|
||||
void CCState::AnalyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs,
|
||||
CCAssignFn Fn) {
|
||||
unsigned NumOps = Outs.size();
|
||||
for (unsigned i = 0; i != NumOps; ++i) {
|
||||
MVT ArgVT = Outs[i].VT;
|
||||
ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
|
||||
if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
|
||||
#ifndef NDEBUG
|
||||
dbgs() << "Call operand #" << i << " has unhandled type "
|
||||
<< EVT(ArgVT).getEVTString() << '\n';
|
||||
#endif
|
||||
llvm_unreachable(nullptr);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Same as above except it takes vectors of types and argument flags.
|
||||
void CCState::AnalyzeCallOperands(SmallVectorImpl<MVT> &ArgVTs,
|
||||
SmallVectorImpl<ISD::ArgFlagsTy> &Flags,
|
||||
CCAssignFn Fn) {
|
||||
unsigned NumOps = ArgVTs.size();
|
||||
for (unsigned i = 0; i != NumOps; ++i) {
|
||||
MVT ArgVT = ArgVTs[i];
|
||||
ISD::ArgFlagsTy ArgFlags = Flags[i];
|
||||
if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
|
||||
#ifndef NDEBUG
|
||||
dbgs() << "Call operand #" << i << " has unhandled type "
|
||||
<< EVT(ArgVT).getEVTString() << '\n';
|
||||
#endif
|
||||
llvm_unreachable(nullptr);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Analyze the return values of a call, incorporating info about the passed
|
||||
/// values into this state.
|
||||
void CCState::AnalyzeCallResult(const SmallVectorImpl<ISD::InputArg> &Ins,
|
||||
CCAssignFn Fn) {
|
||||
for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
|
||||
MVT VT = Ins[i].VT;
|
||||
ISD::ArgFlagsTy Flags = Ins[i].Flags;
|
||||
if (Fn(i, VT, VT, CCValAssign::Full, Flags, *this)) {
|
||||
#ifndef NDEBUG
|
||||
dbgs() << "Call result #" << i << " has unhandled type "
|
||||
<< EVT(VT).getEVTString() << '\n';
|
||||
#endif
|
||||
llvm_unreachable(nullptr);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Same as above except it's specialized for calls that produce a single value.
|
||||
void CCState::AnalyzeCallResult(MVT VT, CCAssignFn Fn) {
|
||||
if (Fn(0, VT, VT, CCValAssign::Full, ISD::ArgFlagsTy(), *this)) {
|
||||
#ifndef NDEBUG
|
||||
dbgs() << "Call result has unhandled type "
|
||||
<< EVT(VT).getEVTString() << '\n';
|
||||
#endif
|
||||
llvm_unreachable(nullptr);
|
||||
}
|
||||
}
|
||||
|
||||
static bool isValueTypeInRegForCC(CallingConv::ID CC, MVT VT) {
|
||||
if (VT.isVector())
|
||||
return true; // Assume -msse-regparm might be in effect.
|
||||
if (!VT.isInteger())
|
||||
return false;
|
||||
if (CC == CallingConv::X86_VectorCall || CC == CallingConv::X86_FastCall)
|
||||
return true;
|
||||
return false;
|
||||
}
|
||||
|
||||
void CCState::getRemainingRegParmsForType(SmallVectorImpl<MCPhysReg> &Regs,
|
||||
MVT VT, CCAssignFn Fn) {
|
||||
unsigned SavedStackOffset = StackOffset;
|
||||
unsigned SavedMaxStackArgAlign = MaxStackArgAlign;
|
||||
unsigned NumLocs = Locs.size();
|
||||
|
||||
// Set the 'inreg' flag if it is used for this calling convention.
|
||||
ISD::ArgFlagsTy Flags;
|
||||
if (isValueTypeInRegForCC(CallingConv, VT))
|
||||
Flags.setInReg();
|
||||
|
||||
// Allocate something of this value type repeatedly until we get assigned a
|
||||
// location in memory.
|
||||
bool HaveRegParm = true;
|
||||
while (HaveRegParm) {
|
||||
if (Fn(0, VT, VT, CCValAssign::Full, Flags, *this)) {
|
||||
#ifndef NDEBUG
|
||||
dbgs() << "Call has unhandled type " << EVT(VT).getEVTString()
|
||||
<< " while computing remaining regparms\n";
|
||||
#endif
|
||||
llvm_unreachable(nullptr);
|
||||
}
|
||||
HaveRegParm = Locs.back().isRegLoc();
|
||||
}
|
||||
|
||||
// Copy all the registers from the value locations we added.
|
||||
assert(NumLocs < Locs.size() && "CC assignment failed to add location");
|
||||
for (unsigned I = NumLocs, E = Locs.size(); I != E; ++I)
|
||||
if (Locs[I].isRegLoc())
|
||||
Regs.push_back(MCPhysReg(Locs[I].getLocReg()));
|
||||
|
||||
// Clear the assigned values and stack memory. We leave the registers marked
|
||||
// as allocated so that future queries don't return the same registers, i.e.
|
||||
// when i64 and f64 are both passed in GPRs.
|
||||
StackOffset = SavedStackOffset;
|
||||
MaxStackArgAlign = SavedMaxStackArgAlign;
|
||||
Locs.resize(NumLocs);
|
||||
}
|
||||
|
||||
void CCState::analyzeMustTailForwardedRegisters(
|
||||
SmallVectorImpl<ForwardedRegister> &Forwards, ArrayRef<MVT> RegParmTypes,
|
||||
CCAssignFn Fn) {
|
||||
// Oftentimes calling conventions will not user register parameters for
|
||||
// variadic functions, so we need to assume we're not variadic so that we get
|
||||
// all the registers that might be used in a non-variadic call.
|
||||
SaveAndRestore<bool> SavedVarArg(IsVarArg, false);
|
||||
SaveAndRestore<bool> SavedMustTail(AnalyzingMustTailForwardedRegs, true);
|
||||
|
||||
for (MVT RegVT : RegParmTypes) {
|
||||
SmallVector<MCPhysReg, 8> RemainingRegs;
|
||||
getRemainingRegParmsForType(RemainingRegs, RegVT, Fn);
|
||||
const TargetLowering *TL = MF.getSubtarget().getTargetLowering();
|
||||
const TargetRegisterClass *RC = TL->getRegClassFor(RegVT);
|
||||
for (MCPhysReg PReg : RemainingRegs) {
|
||||
unsigned VReg = MF.addLiveIn(PReg, RC);
|
||||
Forwards.push_back(ForwardedRegister(VReg, PReg, RegVT));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
bool CCState::resultsCompatible(CallingConv::ID CalleeCC,
|
||||
CallingConv::ID CallerCC, MachineFunction &MF,
|
||||
LLVMContext &C,
|
||||
const SmallVectorImpl<ISD::InputArg> &Ins,
|
||||
CCAssignFn CalleeFn, CCAssignFn CallerFn) {
|
||||
if (CalleeCC == CallerCC)
|
||||
return true;
|
||||
SmallVector<CCValAssign, 4> RVLocs1;
|
||||
CCState CCInfo1(CalleeCC, false, MF, RVLocs1, C);
|
||||
CCInfo1.AnalyzeCallResult(Ins, CalleeFn);
|
||||
|
||||
SmallVector<CCValAssign, 4> RVLocs2;
|
||||
CCState CCInfo2(CallerCC, false, MF, RVLocs2, C);
|
||||
CCInfo2.AnalyzeCallResult(Ins, CallerFn);
|
||||
|
||||
if (RVLocs1.size() != RVLocs2.size())
|
||||
return false;
|
||||
for (unsigned I = 0, E = RVLocs1.size(); I != E; ++I) {
|
||||
const CCValAssign &Loc1 = RVLocs1[I];
|
||||
const CCValAssign &Loc2 = RVLocs2[I];
|
||||
if (Loc1.getLocInfo() != Loc2.getLocInfo())
|
||||
return false;
|
||||
bool RegLoc1 = Loc1.isRegLoc();
|
||||
if (RegLoc1 != Loc2.isRegLoc())
|
||||
return false;
|
||||
if (RegLoc1) {
|
||||
if (Loc1.getLocReg() != Loc2.getLocReg())
|
||||
return false;
|
||||
} else {
|
||||
if (Loc1.getLocMemOffset() != Loc2.getLocMemOffset())
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
Reference in New Issue
Block a user