//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// CopyFromReg - This node indicates that the input value is a virtual or
// physical register that is defined outside of the scope of this
- // SelectionDAG. The register is available from the RegSDNode object.
+ // SelectionDAG. The register is available from the RegisterSDNode object.
CopyFromReg,
// UNDEF - An undefined node
ADD, SUB, MUL, SDIV, UDIV, SREM, UREM,
// SMUL_LOHI/UMUL_LOHI - Multiply two integers of type iN, producing
- // a signed/unsigned value of type i[2*n], and return the full value as
+ // a signed/unsigned value of type i[2*N], and return the full value as
// two results, each of type iN.
SMUL_LOHI, UMUL_LOHI,
// FCOPYSIGN(f32, f64) is allowed.
FCOPYSIGN,
+ // INT = FGETSIGN(FP) - Return the sign bit of the specified floating point
+ // value as an integer 0/1 value.
+ FGETSIGN,
+
/// BUILD_VECTOR(ELT0, ELT1, ELT2, ELT3,...) - Return a vector
/// with the specified, possibly variable, elements. The number of elements
/// is required to be a power of two.
VECTOR_SHUFFLE,
/// SCALAR_TO_VECTOR(VAL) - This represents the operation of loading a
- /// scalar value into the low element of the resultant vector type. The top
- /// elements of the vector are undefined.
+ /// scalar value into element 0 of the resultant vector type. The top
+ /// elements 1 to N-1 of the N-element vector are undefined.
SCALAR_TO_VECTOR,
// EXTRACT_SUBREG - This node is used to extract a sub-register value.
INSERT_SUBREG,
// MULHU/MULHS - Multiply high - Multiply two integers of type iN, producing
- // an unsigned/signed value of type i[2*n], then return the top part.
+ // an unsigned/signed value of type i[2*N], then return the top part.
MULHU, MULHS,
// Bitwise operators - logical and, logical or, logical xor, shift left,
// operand, a ValueType node.
SIGN_EXTEND_INREG,
- // FP_TO_[US]INT - Convert a floating point value to a signed or unsigned
- // integer.
+ /// FP_TO_[US]INT - Convert a floating point value to a signed or unsigned
+ /// integer.
FP_TO_SINT,
FP_TO_UINT,
- // FP_ROUND - Perform a rounding operation from the current
- // precision down to the specified precision (currently always 64->32).
+ /// X = FP_ROUND(Y, TRUNC) - Rounding 'Y' from a larger floating point type
+ /// down to the precision of the destination VT. TRUNC is a flag, which is
+ /// always an integer that is zero or one. If TRUNC is 0, this is a
+ /// normal rounding, if it is 1, this FP_ROUND is known to not change the
+ /// value of Y.
+ ///
+ /// The TRUNC = 1 case is used in cases where we know that the value will
+ /// not be modified by the node, because Y is not using any of the extra
+ /// precision of source type. This allows certain transformations like
+ /// FP_EXTEND(FP_ROUND(X,1)) -> X which are not safe for
+ /// FP_EXTEND(FP_ROUND(X,0)) because the extra bits aren't removed.
FP_ROUND,
-
- // FP_ROUND_INREG - This operator takes a floating point register, and
- // rounds it to a floating point value. It then promotes it and returns it
- // in a register of the same size. This operation effectively just discards
- // excess precision. The type to round down to is specified by the 1th
- // operation, a VTSDNode (currently always 64->32->64).
+
+ // FLT_ROUNDS - Returns current rounding mode:
+ // -1 Undefined
+ // 0 Round to 0
+ // 1 Round to nearest
+ // 2 Round to +inf
+ // 3 Round to -inf
+ FLT_ROUNDS,
+
+ /// X = FP_ROUND_INREG(Y, VT) - This operator takes an FP register, and
+ /// rounds it to a floating point value. It then promotes it and returns it
+ /// in a register of the same size. This operation effectively just
+ /// discards excess precision. The type to round down to is specified by
+ /// the VT operand, a VTSDNode.
FP_ROUND_INREG,
- // FP_EXTEND - Extend a smaller FP type into a larger FP type.
+ /// X = FP_EXTEND(Y) - Extend a smaller FP type into a larger FP type.
FP_EXTEND,
// BIT_CONVERT - Theis operator converts between integer and FP values, as
// chain as output.
TRAMPOLINE,
+ // TRAP - Trapping instruction
+ TRAP,
+
// BUILTIN_OP_END - This must be the last enum value in this list.
BUILTIN_OP_END
};
inline bool isTargetOpcode() const;
inline unsigned getTargetOpcode() const;
+
+ /// reachesChainWithoutSideEffects - Return true if this operand (which must
+ /// be a chain) reaches the specified operand without crossing any
+ /// side-effecting instructions. In practice, this looks through token
+ /// factors and non-volatile loads. In order to remain efficient, this only
+ /// looks a couple of nodes in, it does not do an exhaustive search.
+ bool reachesChainWithoutSideEffects(SDOperand Dest, unsigned Depth = 2) const;
+
/// hasOneUse - Return true if there is exactly one operation using this
/// result value of the defining operator.
inline bool hasOneUse() const;
///
int getNodeId() const { return NodeId; }
+ /// setNodeId - Set unique node id.
+ void setNodeId(int Id) { NodeId = Id; }
+
typedef SmallVector<SDNode*,3>::const_iterator use_iterator;
use_iterator use_begin() const { return Uses.begin(); }
use_iterator use_end() const { return Uses.end(); }
///
void Profile(FoldingSetNodeID &ID);
- void setNodeId(int Id) {
- NodeId = Id;
- }
-
protected:
friend class SelectionDAG;
}
};
+/// LSBaseSDNode - Base class for LoadSDNode and StoreSDNode
+///
+class LSBaseSDNode : public SDNode {
+private:
+ //! SrcValue - Memory location for alias analysis.
+ const Value *SrcValue;
+
+ //! SVOffset - Memory location offset.
+ int SVOffset;
+
+ //! Alignment - Alignment of memory location in bytes.
+ unsigned Alignment;
+
+ //! IsVolatile - True if the store is volatile.
+ bool IsVolatile;
+protected:
+ //! Operand array for load and store
+ /*!
+ \note Moving this array to the base class captures more
+ common functionality shared between LoadSDNode and
+ StoreSDNode
+ */
+ SDOperand Ops[4];
+public:
+ LSBaseSDNode(ISD::NodeType NodeTy, SDVTList VTs, const Value *SV, int SVO,
+ unsigned Align, bool Vol)
+ : SDNode(NodeTy, VTs),
+ SrcValue(SV), SVOffset(SVO), Alignment(Align), IsVolatile(Vol)
+ { }
+
+ const SDOperand getChain() const {
+ return getOperand(0);
+ }
+ const SDOperand getBasePtr() const {
+ return getOperand(getOpcode() == ISD::LOAD ? 1 : 2);
+ }
+ const SDOperand getOffset() const {
+ return getOperand(getOpcode() == ISD::LOAD ? 2 : 3);
+ }
+ const SDOperand getValue() const {
+ assert(getOpcode() == ISD::STORE);
+ return getOperand(1);
+ }
+
+ const Value *getSrcValue() const { return SrcValue; }
+ int getSrcValueOffset() const { return SVOffset; }
+ unsigned getAlignment() const { return Alignment; }
+ bool isVolatile() const { return IsVolatile; }
+
+ static bool classof(const LSBaseSDNode *N) { return true; }
+ static bool classof(const SDNode *N) { return true; }
+};
+
/// LoadSDNode - This class is used to represent ISD::LOAD nodes.
///
-class LoadSDNode : public SDNode {
+class LoadSDNode : public LSBaseSDNode {
virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
- SDOperand Ops[3];
// AddrMode - unindexed, pre-indexed, post-indexed.
ISD::MemIndexedMode AddrMode;
// LoadedVT - VT of loaded value before extension.
MVT::ValueType LoadedVT;
-
- // SrcValue - Memory location for alias analysis.
- const Value *SrcValue;
-
- // SVOffset - Memory location offset.
- int SVOffset;
-
- // Alignment - Alignment of memory location in bytes.
- unsigned Alignment;
-
- // IsVolatile - True if the load is volatile.
- bool IsVolatile;
protected:
friend class SelectionDAG;
LoadSDNode(SDOperand *ChainPtrOff, SDVTList VTs,
ISD::MemIndexedMode AM, ISD::LoadExtType ETy, MVT::ValueType LVT,
const Value *SV, int O=0, unsigned Align=0, bool Vol=false)
- : SDNode(ISD::LOAD, VTs),
- AddrMode(AM), ExtType(ETy), LoadedVT(LVT), SrcValue(SV), SVOffset(O),
- Alignment(Align), IsVolatile(Vol) {
+ : LSBaseSDNode(ISD::LOAD, VTs, SV, O, Align, Vol),
+ AddrMode(AM), ExtType(ETy), LoadedVT(LVT) {
Ops[0] = ChainPtrOff[0]; // Chain
Ops[1] = ChainPtrOff[1]; // Ptr
Ops[2] = ChainPtrOff[2]; // Off
}
public:
- const SDOperand getChain() const { return getOperand(0); }
- const SDOperand getBasePtr() const { return getOperand(1); }
- const SDOperand getOffset() const { return getOperand(2); }
ISD::MemIndexedMode getAddressingMode() const { return AddrMode; }
ISD::LoadExtType getExtensionType() const { return ExtType; }
MVT::ValueType getLoadedVT() const { return LoadedVT; }
- const Value *getSrcValue() const { return SrcValue; }
- int getSrcValueOffset() const { return SVOffset; }
- unsigned getAlignment() const { return Alignment; }
- bool isVolatile() const { return IsVolatile; }
static bool classof(const LoadSDNode *) { return true; }
static bool classof(const SDNode *N) {
/// StoreSDNode - This class is used to represent ISD::STORE nodes.
///
-class StoreSDNode : public SDNode {
+class StoreSDNode : public LSBaseSDNode {
virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
- SDOperand Ops[4];
// AddrMode - unindexed, pre-indexed, post-indexed.
ISD::MemIndexedMode AddrMode;
// StoredVT - VT of the value after truncation.
MVT::ValueType StoredVT;
-
- // SrcValue - Memory location for alias analysis.
- const Value *SrcValue;
-
- // SVOffset - Memory location offset.
- int SVOffset;
-
- // Alignment - Alignment of memory location in bytes.
- unsigned Alignment;
-
- // IsVolatile - True if the store is volatile.
- bool IsVolatile;
protected:
friend class SelectionDAG;
StoreSDNode(SDOperand *ChainValuePtrOff, SDVTList VTs,
ISD::MemIndexedMode AM, bool isTrunc, MVT::ValueType SVT,
const Value *SV, int O=0, unsigned Align=0, bool Vol=false)
- : SDNode(ISD::STORE, VTs),
- AddrMode(AM), IsTruncStore(isTrunc), StoredVT(SVT), SrcValue(SV),
- SVOffset(O), Alignment(Align), IsVolatile(Vol) {
+ : LSBaseSDNode(ISD::STORE, VTs, SV, O, Align, Vol),
+ AddrMode(AM), IsTruncStore(isTrunc), StoredVT(SVT) {
Ops[0] = ChainValuePtrOff[0]; // Chain
Ops[1] = ChainValuePtrOff[1]; // Value
Ops[2] = ChainValuePtrOff[2]; // Ptr
}
public:
- const SDOperand getChain() const { return getOperand(0); }
- const SDOperand getValue() const { return getOperand(1); }
- const SDOperand getBasePtr() const { return getOperand(2); }
- const SDOperand getOffset() const { return getOperand(3); }
ISD::MemIndexedMode getAddressingMode() const { return AddrMode; }
bool isTruncatingStore() const { return IsTruncStore; }
MVT::ValueType getStoredVT() const { return StoredVT; }
- const Value *getSrcValue() const { return SrcValue; }
- int getSrcValueOffset() const { return SVOffset; }
- unsigned getAlignment() const { return Alignment; }
- bool isVolatile() const { return IsVolatile; }
static bool classof(const StoreSDNode *) { return true; }
static bool classof(const SDNode *N) {
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