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don't repeat function names in comments; NFC 

llvm-svn: 256584
This commit is contained in:
Sanjay Patel 2015-12-29 22:11:50 +00:00
parent 0b996dd634
commit ac6e910c42
1 changed files with 47 additions and 57 deletions
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104
llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
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@ -116,8 +116,8 @@ TargetLowering::makeLibCall(SelectionDAG &DAG,
return LowerCallTo(CLI);
}
/// SoftenSetCCOperands - Soften the operands of a comparison. This code is
/// shared among BR_CC, SELECT_CC, and SETCC handlers.
/// Soften the operands of a comparison. This code is shared among BR_CC,
/// SELECT_CC, and SETCC handlers.
void TargetLowering::softenSetCCOperands(SelectionDAG &DAG, EVT VT,
SDValue &NewLHS, SDValue &NewRHS,
ISD::CondCode &CCCode,
@ -231,9 +231,8 @@ void TargetLowering::softenSetCCOperands(SelectionDAG &DAG, EVT VT,
}
}
/// getJumpTableEncoding - Return the entry encoding for a jump table in the
/// current function. The returned value is a member of the
/// MachineJumpTableInfo::JTEntryKind enum.
/// Return the entry encoding for a jump table in the current function. The
/// returned value is a member of the MachineJumpTableInfo::JTEntryKind enum.
unsigned TargetLowering::getJumpTableEncoding() const {
// In non-pic modes, just use the address of a block.
if (getTargetMachine().getRelocationModel() != Reloc::PIC_)
@ -259,9 +258,8 @@ SDValue TargetLowering::getPICJumpTableRelocBase(SDValue Table,
return Table;
}
/// getPICJumpTableRelocBaseExpr - This returns the relocation base for the
/// given PIC jumptable, the same as getPICJumpTableRelocBase, but as an
/// MCExpr.
/// This returns the relocation base for the given PIC jumptable, the same as
/// getPICJumpTableRelocBase, but as an MCExpr.
const MCExpr *
TargetLowering::getPICJumpTableRelocBaseExpr(const MachineFunction *MF,
unsigned JTI,MCContext &Ctx) const{
@ -288,10 +286,9 @@ TargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
// Optimization Methods
//===----------------------------------------------------------------------===//
/// ShrinkDemandedConstant - Check to see if the specified operand of the
/// specified instruction is a constant integer. If so, check to see if there
/// are any bits set in the constant that are not demanded. If so, shrink the
/// constant and return true.
/// Check to see if the specified operand of the specified instruction is a
/// constant integer. If so, check to see if there are any bits set in the
/// constant that are not demanded. If so, shrink the constant and return true.
bool TargetLowering::TargetLoweringOpt::ShrinkDemandedConstant(SDValue Op,
const APInt &Demanded) {
SDLoc dl(Op);
@ -326,10 +323,9 @@ bool TargetLowering::TargetLoweringOpt::ShrinkDemandedConstant(SDValue Op,
return false;
}
/// ShrinkDemandedOp - Convert x+y to (VT)((SmallVT)x+(SmallVT)y) if the
/// casts are free. This uses isZExtFree and ZERO_EXTEND for the widening
/// cast, but it could be generalized for targets with other types of
/// implicit widening casts.
/// Convert x+y to (VT)((SmallVT)x+(SmallVT)y) if the casts are free.
/// This uses isZExtFree and ZERO_EXTEND for the widening cast, but it could be
/// generalized for targets with other types of implicit widening casts.
bool
TargetLowering::TargetLoweringOpt::ShrinkDemandedOp(SDValue Op,
unsigned BitWidth,
@ -375,13 +371,13 @@ TargetLowering::TargetLoweringOpt::ShrinkDemandedOp(SDValue Op,
return false;
}
/// SimplifyDemandedBits - Look at Op. At this point, we know that only the
/// DemandedMask bits of the result of Op are ever used downstream. If we can
/// use this information to simplify Op, create a new simplified DAG node and
/// return true, returning the original and new nodes in Old and New. Otherwise,
/// analyze the expression and return a mask of KnownOne and KnownZero bits for
/// the expression (used to simplify the caller). The KnownZero/One bits may
/// only be accurate for those bits in the DemandedMask.
/// Look at Op. At this point, we know that only the DemandedMask bits of the
/// result of Op are ever used downstream. If we can use this information to
/// simplify Op, create a new simplified DAG node and return true, returning the
/// original and new nodes in Old and New. Otherwise, analyze the expression and
/// return a mask of KnownOne and KnownZero bits for the expression (used to
/// simplify the caller). The KnownZero/One bits may only be accurate for those
/// bits in the DemandedMask.
bool TargetLowering::SimplifyDemandedBits(SDValue Op,
const APInt &DemandedMask,
APInt &KnownZero,
@ -1131,9 +1127,8 @@ bool TargetLowering::SimplifyDemandedBits(SDValue Op,
return false;
}
/// computeKnownBitsForTargetNode - Determine which of the bits specified
/// in Mask are known to be either zero or one and return them in the
/// KnownZero/KnownOne bitsets.
/// Determine which of the bits specified in Mask are known to be either zero or
/// one and return them in the KnownZero/KnownOne bitsets.
void TargetLowering::computeKnownBitsForTargetNode(const SDValue Op,
APInt &KnownZero,
APInt &KnownOne,
@ -1148,9 +1143,8 @@ void TargetLowering::computeKnownBitsForTargetNode(const SDValue Op,
KnownZero = KnownOne = APInt(KnownOne.getBitWidth(), 0);
}
/// ComputeNumSignBitsForTargetNode - This method can be implemented by
/// targets that want to expose additional information about sign bits to the
/// DAG Combiner.
/// This method can be implemented by targets that want to expose additional
/// information about sign bits to the DAG Combiner.
unsigned TargetLowering::ComputeNumSignBitsForTargetNode(SDValue Op,
const SelectionDAG &,
unsigned Depth) const {
@ -1163,10 +1157,8 @@ unsigned TargetLowering::ComputeNumSignBitsForTargetNode(SDValue Op,
return 1;
}
/// ValueHasExactlyOneBitSet - Test if the given value is known to have exactly
/// one bit set. This differs from computeKnownBits in that it doesn't need to
/// determine which bit is set.
///
/// Test if the given value is known to have exactly one bit set. This differs
/// from computeKnownBits in that it doesn't need to determine which bit is set.
static bool ValueHasExactlyOneBitSet(SDValue Val, const SelectionDAG &DAG) {
// A left-shift of a constant one will have exactly one bit set, because
// shifting the bit off the end is undefined.
@ -1250,8 +1242,8 @@ bool TargetLowering::isConstFalseVal(const SDNode *N) const {
return CN->isNullValue();
}
/// SimplifySetCC - Try to simplify a setcc built with the specified operands
/// and cc. If it is unable to simplify it, return a null SDValue.
/// Try to simplify a setcc built with the specified operands and cc. If it is
/// unable to simplify it, return a null SDValue.
SDValue
TargetLowering::SimplifySetCC(EVT VT, SDValue N0, SDValue N1,
ISD::CondCode Cond, bool foldBooleans,
@ -2084,8 +2076,8 @@ TargetLowering::SimplifySetCC(EVT VT, SDValue N0, SDValue N1,
return SDValue();
}
/// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the
/// node is a GlobalAddress + offset.
/// Returns true (and the GlobalValue and the offset) if the node is a
/// GlobalAddress + offset.
bool TargetLowering::isGAPlusOffset(SDNode *N, const GlobalValue *&GA,
int64_t &Offset) const {
if (auto *GASD = dyn_cast<GlobalAddressSDNode>(N)) {
@ -2164,9 +2156,9 @@ TargetLowering::getConstraintType(StringRef Constraint) const {
return C_Unknown;
}
/// LowerXConstraint - try to replace an X constraint, which matches anything,
/// with another that has more specific requirements based on the type of the
/// corresponding operand.
/// Try to replace an X constraint, which matches anything, with another that
/// has more specific requirements based on the type of the corresponding
/// operand.
const char *TargetLowering::LowerXConstraint(EVT ConstraintVT) const{
if (ConstraintVT.isInteger())
return "r";
@ -2175,8 +2167,8 @@ const char *TargetLowering::LowerXConstraint(EVT ConstraintVT) const{
return nullptr;
}
/// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
/// vector. If it is invalid, don't add anything to Ops.
/// Lower the specified operand into the Ops vector.
/// If it is invalid, don't add anything to Ops.
void TargetLowering::LowerAsmOperandForConstraint(SDValue Op,
std::string &Constraint,
std::vector<SDValue> &Ops,
@ -2289,30 +2281,30 @@ TargetLowering::getRegForInlineAsmConstraint(const TargetRegisterInfo *RI,
//===----------------------------------------------------------------------===//
// Constraint Selection.
/// isMatchingInputConstraint - Return true of this is an input operand that is
/// a matching constraint like "4".
/// Return true of this is an input operand that is a matching constraint like
/// "4".
bool TargetLowering::AsmOperandInfo::isMatchingInputConstraint() const {
assert(!ConstraintCode.empty() && "No known constraint!");
return isdigit(static_cast<unsigned char>(ConstraintCode[0]));
}
/// getMatchedOperand - If this is an input matching constraint, this method
/// returns the output operand it matches.
/// If this is an input matching constraint, this method returns the output
/// operand it matches.
unsigned TargetLowering::AsmOperandInfo::getMatchedOperand() const {
assert(!ConstraintCode.empty() && "No known constraint!");
return atoi(ConstraintCode.c_str());
}
/// ParseConstraints - Split up the constraint string from the inline
/// assembly value into the specific constraints and their prefixes,
/// and also tie in the associated operand values.
/// Split up the constraint string from the inline assembly value into the
/// specific constraints and their prefixes, and also tie in the associated
/// operand values.
/// If this returns an empty vector, and if the constraint string itself
/// isn't empty, there was an error parsing.
TargetLowering::AsmOperandInfoVector
TargetLowering::ParseConstraints(const DataLayout &DL,
const TargetRegisterInfo *TRI,
ImmutableCallSite CS) const {
/// ConstraintOperands - Information about all of the constraints.
/// Information about all of the constraints.
AsmOperandInfoVector ConstraintOperands;
const InlineAsm *IA = cast<InlineAsm>(CS.getCalledValue());
unsigned maCount = 0; // Largest number of multiple alternative constraints.
@ -2493,8 +2485,7 @@ TargetLowering::ParseConstraints(const DataLayout &DL,
return ConstraintOperands;
}
/// getConstraintGenerality - Return an integer indicating how general CT
/// is.
/// Return an integer indicating how general CT is.
static unsigned getConstraintGenerality(TargetLowering::ConstraintType CT) {
switch (CT) {
case TargetLowering::C_Other:
@ -2583,8 +2574,8 @@ TargetLowering::ConstraintWeight
return weight;
}
/// ChooseConstraint - If there are multiple different constraints that we
/// could pick for this operand (e.g. "imr") try to pick the 'best' one.
/// If there are multiple different constraints that we could pick for this
/// operand (e.g. "imr") try to pick the 'best' one.
/// This is somewhat tricky: constraints fall into four classes:
/// Other -> immediates and magic values
/// Register -> one specific register
@ -2651,9 +2642,8 @@ static void ChooseConstraint(TargetLowering::AsmOperandInfo &OpInfo,
OpInfo.ConstraintType = BestType;
}
/// ComputeConstraintToUse - Determines the constraint code and constraint
/// type to use for the specific AsmOperandInfo, setting
/// OpInfo.ConstraintCode and OpInfo.ConstraintType.
/// Determines the constraint code and constraint type to use for the specific
/// AsmOperandInfo, setting OpInfo.ConstraintCode and OpInfo.ConstraintType.
void TargetLowering::ComputeConstraintToUse(AsmOperandInfo &OpInfo,
SDValue Op,
SelectionDAG *DAG) const {