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All constant-evaluation code now unified into

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TargetInstrInfo::ConvertConstantToIntType().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7390 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vikram S. Adve 2003-07-29 19:50:12 +00:00
parent 814030a0c5
commit b5161b60c2
2 changed files with 16 additions and 62 deletions
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39
lib/CodeGen/InstrSelection/InstrSelectionSupport.cpp
View File

@ -87,44 +87,21 @@ ChooseRegOrImmed(Value* val,
getImmedValue = 0;
// To use reg or immed, constant needs to be integer, bool, or a NULL pointer
Constant *CPV = dyn_cast<Constant>(val);
if (CPV == NULL
|| CPV->isConstantExpr()
|| (! CPV->getType()->isIntegral() &&
! (isa<PointerType>(CPV->getType()) && CPV->isNullValue())))
// TargetInstrInfo::ConvertConstantToIntType() does the right conversions:
bool isValidConstant;
uint64_t valueToUse =
target.getInstrInfo().ConvertConstantToIntType(target, val, val->getType(),
isValidConstant);
if (! isValidConstant)
return MachineOperand::MO_VirtualRegister;
// Now get the constant value and check if it fits in the IMMED field.
// Take advantage of the fact that the max unsigned value will rarely
// fit into any IMMED field and ignore that case (i.e., cast smaller
// unsigned constants to signed).
// Now check if the constant value fits in the IMMED field.
//
int64_t intValue;
if (isa<PointerType>(CPV->getType()))
intValue = 0; // We checked above that it is NULL
else if (ConstantBool* CB = dyn_cast<ConstantBool>(CPV))
intValue = CB->getValue();
else if (CPV->getType()->isSigned())
intValue = cast<ConstantSInt>(CPV)->getValue();
else
{ // get the int value and sign-extend if original was less than 64 bits
intValue = cast<ConstantUInt>(CPV)->getValue();
switch(CPV->getType()->getPrimitiveID())
{
case Type::UByteTyID: intValue = (int64_t) (int8_t) intValue; break;
case Type::UShortTyID: intValue = (int64_t) (short) intValue; break;
case Type::UIntTyID: intValue = (int64_t) (int) intValue; break;
default: break;
}
}
return ChooseRegOrImmed(intValue, CPV->getType()->isSigned(),
return ChooseRegOrImmed((int64_t) valueToUse, val->getType()->isSigned(),
opCode, target, canUseImmed,
getMachineRegNum, getImmedValue);
}
//---------------------------------------------------------------------------
// Function: FixConstantOperandsForInstr
//

39
lib/Target/SparcV9/InstrSelection/InstrSelectionSupport.cpp
View File

@ -87,44 +87,21 @@ ChooseRegOrImmed(Value* val,
getImmedValue = 0;
// To use reg or immed, constant needs to be integer, bool, or a NULL pointer
Constant *CPV = dyn_cast<Constant>(val);
if (CPV == NULL
|| CPV->isConstantExpr()
|| (! CPV->getType()->isIntegral() &&
! (isa<PointerType>(CPV->getType()) && CPV->isNullValue())))
// TargetInstrInfo::ConvertConstantToIntType() does the right conversions:
bool isValidConstant;
uint64_t valueToUse =
target.getInstrInfo().ConvertConstantToIntType(target, val, val->getType(),
isValidConstant);
if (! isValidConstant)
return MachineOperand::MO_VirtualRegister;
// Now get the constant value and check if it fits in the IMMED field.
// Take advantage of the fact that the max unsigned value will rarely
// fit into any IMMED field and ignore that case (i.e., cast smaller
// unsigned constants to signed).
// Now check if the constant value fits in the IMMED field.
//
int64_t intValue;
if (isa<PointerType>(CPV->getType()))
intValue = 0; // We checked above that it is NULL
else if (ConstantBool* CB = dyn_cast<ConstantBool>(CPV))
intValue = CB->getValue();
else if (CPV->getType()->isSigned())
intValue = cast<ConstantSInt>(CPV)->getValue();
else
{ // get the int value and sign-extend if original was less than 64 bits
intValue = cast<ConstantUInt>(CPV)->getValue();
switch(CPV->getType()->getPrimitiveID())
{
case Type::UByteTyID: intValue = (int64_t) (int8_t) intValue; break;
case Type::UShortTyID: intValue = (int64_t) (short) intValue; break;
case Type::UIntTyID: intValue = (int64_t) (int) intValue; break;
default: break;
}
}
return ChooseRegOrImmed(intValue, CPV->getType()->isSigned(),
return ChooseRegOrImmed((int64_t) valueToUse, val->getType()->isSigned(),
opCode, target, canUseImmed,
getMachineRegNum, getImmedValue);
}
//---------------------------------------------------------------------------
// Function: FixConstantOperandsForInstr
//