6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-13 04:30:23 +00:00
Code Issues Projects Releases Wiki Activity

Insert copy operations for FP arguments to a varargs function,

Browse Source 
to copy the FP arg. to an integer.  Necessary so that the
register allocator has two different live ranges for the FP value
and the int. argument.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2314 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vikram S. Adve 2002-04-25 04:37:51 +00:00
parent a4a943dd5a
commit dbc4fad577
1 changed files with 69 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

100
lib/Target/SparcV9/SparcV9InstrSelection.cpp
View File

@ -239,12 +239,11 @@ ChooseMovpccAfterSub(const InstructionNode* instrNode,
}
static inline MachineOpCode
ChooseConvertToFloatInstr(const InstructionNode* instrNode,
const Type* opType)
ChooseConvertToFloatInstr(OpLabel vopCode, const Type* opType)
{
MachineOpCode opCode = INVALID_OPCODE;
switch(instrNode->getOpLabel())
switch(vopCode)
{
case ToFloatTy:
if (opType == Type::SByteTy || opType == Type::ShortTy || opType == Type::IntTy)
@ -285,14 +284,11 @@ ChooseConvertToFloatInstr(const InstructionNode* instrNode,
}
static inline MachineOpCode
ChooseConvertToIntInstr(const InstructionNode* instrNode,
const Type* opType)
ChooseConvertToIntInstr(OpLabel vopCode, const Type* opType)
{
MachineOpCode opCode = INVALID_OPCODE;;
int instrType = (int) instrNode->getOpLabel();
if (instrType == ToSByteTy || instrType == ToShortTy || instrType == ToIntTy)
if (vopCode == ToSByteTy || vopCode == ToShortTy || vopCode == ToIntTy)
{
switch (opType->getPrimitiveID())
{
@ -303,7 +299,7 @@ ChooseConvertToIntInstr(const InstructionNode* instrNode,
break;
}
}
else if (instrType == ToLongTy)
else if (vopCode == ToLongTy)
{
switch (opType->getPrimitiveID())
{
@ -320,6 +316,17 @@ ChooseConvertToIntInstr(const InstructionNode* instrNode,
return opCode;
}
MachineInstr*
CreateConvertToIntInstr(OpLabel vopCode, Value* srcVal, Value* destVal)
{
MachineOpCode opCode = ChooseConvertToIntInstr(vopCode, srcVal->getType());
assert(opCode != INVALID_OPCODE && "Expected to need conversion!");
MachineInstr* M = new MachineInstr(opCode);
M->SetMachineOperandVal(0, MachineOperand::MO_VirtualRegister, srcVal);
M->SetMachineOperandVal(1, MachineOperand::MO_VirtualRegister, destVal);
return M;
}
static inline MachineOpCode
ChooseAddInstructionByType(const Type* resultType)
@ -1565,9 +1572,9 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
(dest->getType() == Type::LongTy)? Type::DoubleTy
: Type::FloatTy;
destForCast = new TmpInstruction(destTypeToUse, leftVal);
MachineCodeForInstruction &MCFI =
MachineCodeForInstruction &destMCFI =
MachineCodeForInstruction::get(dest);
MCFI.addTemp(destForCast);
destMCFI.addTemp(destForCast);
vector<TmpInstruction*> tempVec;
target.getInstrInfo().CreateCodeToCopyFloatToInt(
@ -1576,21 +1583,15 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
minstrVec, tempVec, target);
for (unsigned i=0; i < tempVec.size(); ++i)
MCFI.addTemp(tempVec[i]);
destMCFI.addTemp(tempVec[i]);
}
else
destForCast = leftVal;
MachineOpCode opCode=ChooseConvertToIntInstr(subtreeRoot, opType);
assert(opCode != INVALID_OPCODE && "Expected to need conversion!");
M = new MachineInstr(opCode);
M->SetMachineOperandVal(0, MachineOperand::MO_VirtualRegister,
leftVal);
M->SetMachineOperandVal(1, MachineOperand::MO_VirtualRegister,
destForCast);
M = CreateConvertToIntInstr(subtreeRoot->getOpLabel(),
leftVal, destForCast);
mvec.push_back(M);
// Append the copy code, if any, after the conversion instr.
mvec.insert(mvec.end(), minstrVec.begin(), minstrVec.end());
}
@ -1616,7 +1617,8 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
{
Value* leftVal = subtreeRoot->leftChild()->getValue();
const Type* opType = leftVal->getType();
MachineOpCode opCode=ChooseConvertToFloatInstr(subtreeRoot,opType);
MachineOpCode opCode=ChooseConvertToFloatInstr(
subtreeRoot->getOpLabel(), opType);
if (opCode == INVALID_OPCODE) // no conversion needed
{
forwardOperandNum = 0; // forward first operand to user
@ -1641,9 +1643,9 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
: Type::FloatTy;
srcForCast = new TmpInstruction(srcTypeToUse, dest);
MachineCodeForInstruction &DestMCFI =
MachineCodeForInstruction &destMCFI =
MachineCodeForInstruction::get(dest);
DestMCFI.addTemp(srcForCast);
destMCFI.addTemp(srcForCast);
vector<MachineInstr*> minstrVec;
vector<TmpInstruction*> tempVec;
@ -1655,7 +1657,7 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
mvec.insert(mvec.end(), minstrVec.begin(),minstrVec.end());
for (unsigned i=0; i < tempVec.size(); ++i)
DestMCFI.addTemp(tempVec[i]);
destMCFI.addTemp(tempVec[i]);
}
else
srcForCast = leftVal;
@ -2003,14 +2005,16 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
}
case 61: // reg: Call
{ // Generate a call-indirect (i.e., jmpl) for now to expose
// the potential need for registers. If an absolute address
// is available, replace this with a CALL instruction.
// Mark both the indirection register and the return-address
// register as hidden virtual registers.
{ // Generate a direct (CALL) or indirect (JMPL). depending
// Mark the return-address register and the indirection
// register (if any) as hidden virtual registers.
// Also, mark the operands of the Call and return value (if
// any) as implicit operands of the CALL machine instruction.
//
// If this is a varargs function, floating point arguments
// have to passed in integer registers so insert
// copy-float-to-int instructions for each float operand.
//
CallInst *callInstr = cast<CallInst>(subtreeRoot->getInstruction());
Value *callee = callInstr->getCalledValue();
@ -2048,9 +2052,43 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
// in register allocation.
//
// Add the call operands and return value as implicit refs
// const Type* funcType = isa<Function>(callee)? callee->getType()
// : cast<PointerType>(callee->getType())->getElementType();
const Type* funcType = callee->getType();
bool isVarArgs = cast<FunctionType>(cast<PointerType>(funcType)
->getElementType())->isVarArg();
for (unsigned i=0, N=callInstr->getNumOperands(); i < N; ++i)
if (callInstr->getOperand(i) != callee)
mvec.back()->addImplicitRef(callInstr->getOperand(i));
{
Value* argVal = callInstr->getOperand(i);
// Check for FP arguments to varargs functions
if (isVarArgs && argVal->getType()->isFloatingPoint())
{ // Add a copy-float-to-int instruction
MachineCodeForInstruction &destMCFI =
MachineCodeForInstruction::get(callInstr);
Instruction* intArgReg =
new TmpInstruction(Type::IntTy, argVal);
destMCFI.addTemp(intArgReg);
vector<MachineInstr*> minstrVec;
vector<TmpInstruction*> tempVec;
target.getInstrInfo().CreateCodeToCopyFloatToInt(
callInstr->getParent()->getParent(),
argVal, (TmpInstruction*) intArgReg,
minstrVec, tempVec, target);
mvec.insert(mvec.begin(), minstrVec.begin(),minstrVec.end());
for (unsigned i=0; i < tempVec.size(); ++i)
destMCFI.addTemp(tempVec[i]);
argVal = intArgReg;
}
mvec.back()->addImplicitRef(argVal);
}
if (callInstr->getType() != Type::VoidTy)
mvec.back()->addImplicitRef(callInstr, /*isDef*/ true);