dart::Utf8ScanInstr Class Reference

#include <il.h>

Inheritance diagram for dart::Utf8ScanInstr:

Public Member Functions
	Utf8ScanInstr (Value *decoder, Value *bytes, Value *start, Value *end, Value *table, const Slot &decoder_scan_flags_field)
virtual Representation	RequiredInputRepresentation (intptr_t idx) const
virtual Representation	representation () const
virtual bool	HasUnknownSideEffects () const
virtual bool	ComputeCanDeoptimize () const
virtual intptr_t	DeoptimizationTarget () const
virtual void	InferRange (RangeAnalysis *analysis, Range *range)
virtual SpeculativeMode	SpeculativeModeOfInput (intptr_t index) const
virtual bool	AttributesEqual (const Instruction &other) const
bool	IsScanFlagsUnboxed () const
Public Member Functions inherited from dart::TemplateDefinition< 5, NoThrow >
	TemplateDefinition (intptr_t deopt_id=DeoptId::kNone)
	TemplateDefinition (const InstructionSource &source, intptr_t deopt_id=DeoptId::kNone)
virtual intptr_t	InputCount () const
virtual Value *	InputAt (intptr_t i) const
virtual bool	MayThrow () const

Additional Inherited Members
Public Types inherited from dart::TemplateDefinition< 5, NoThrow >
using	BaseClass = typename NoCSE< Definition, PureDefinition >::Base
Protected Attributes inherited from dart::TemplateDefinition< 5, NoThrow >
EmbeddedArray< Value *, N >	inputs_

Detailed Description

Definition at line 6965 of file il.h.

Constructor & Destructor Documentation

Utf8ScanInstr()

dart::Utf8ScanInstr::Utf8ScanInstr ( Value *  decoder, Value *  bytes, Value *  start, Value *  end, Value *  table, const Slot &  decoder_scan_flags_field  )

inline

Definition at line 6967 of file il.h.

      : scan_flags_field_(decoder_scan_flags_field) {
    SetInputAt(0, decoder);
    SetInputAt(1, bytes);
    SetInputAt(2, start);
    SetInputAt(3, end);
    SetInputAt(4, table);
  }

Member Function Documentation

AttributesEqual()

virtual bool dart::Utf8ScanInstr::AttributesEqual ( const Instruction &  other ) const

inlinevirtual

Definition at line 7001 of file il.h.

                                                               {
    return scan_flags_field_.Equals(other.AsUtf8Scan()->scan_flags_field_);
  }

ComputeCanDeoptimize()

virtual bool dart::Utf8ScanInstr::ComputeCanDeoptimize ( ) const

inlinevirtual

Definition at line 6993 of file il.h.

{ return false; }

DeoptimizationTarget()

virtual intptr_t dart::Utf8ScanInstr::DeoptimizationTarget ( ) const

inlinevirtual

Definition at line 6994 of file il.h.

{ return DeoptId::kNone; }

HasUnknownSideEffects()

virtual bool dart::Utf8ScanInstr::HasUnknownSideEffects ( ) const

inlinevirtual

Definition at line 6992 of file il.h.

{ return true; }

InferRange()

void dart::Utf8ScanInstr::InferRange ( RangeAnalysis *  analysis, Range *  range  )

virtual

Definition at line 2980 of file range_analysis.cc.

                                                                    {
  // The input bytes given to the Utf8Scan instruction are in non-negative Smi
  // range and so is the resulting computed length.
  *range = Range(RangeBoundary::FromConstant(0), RangeBoundary::MaxSmi());
}

IsScanFlagsUnboxed()

bool dart::Utf8ScanInstr::IsScanFlagsUnboxed

(

)

const

Definition at line 7188 of file il.cc.

                                             {
  return RepresentationUtils::IsUnboxed(scan_flags_field_.representation());
}

representation()

virtual Representation dart::Utf8ScanInstr::representation ( ) const

inlinevirtual

Definition at line 6990 of file il.h.

{ return kUnboxedIntPtr; }

RequiredInputRepresentation()

virtual Representation dart::Utf8ScanInstr::RequiredInputRepresentation ( intptr_t  idx ) const

inlinevirtual

Definition at line 6983 of file il.h.

                                                                         {
    ASSERT(idx >= 0 || idx <= 4);
    // The start and end inputs are unboxed, but in smi range.
    if (idx == 2 || idx == 3) return kUnboxedIntPtr;
    return kTagged;
  }

SpeculativeModeOfInput()

virtual SpeculativeMode dart::Utf8ScanInstr::SpeculativeModeOfInput ( intptr_t  index ) const

inlinevirtual

Definition at line 6997 of file il.h.

                                                                       {
    return kNotSpeculative;
  }

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The documentation for this class was generated from the following files:

• third_party/dart-lang/sdk/runtime/vm/compiler/backend/il.h
• third_party/dart-lang/sdk/runtime/vm/compiler/backend/il.cc
• third_party/dart-lang/sdk/runtime/vm/compiler/backend/range_analysis.cc