v8::internal::HMarkDeoptimizeOnUndefinedPhase Class Reference

#include <hydrogen-mark-deoptimize.h>

Inheritance diagram for v8::internal::HMarkDeoptimizeOnUndefinedPhase:

Collaboration diagram for v8::internal::HMarkDeoptimizeOnUndefinedPhase:

Public Member Functions
	HMarkDeoptimizeOnUndefinedPhase (HGraph *graph)
void	Run ()
Public Member Functions inherited from v8::internal::HPhase
	HPhase (const char *name, HGraph *graph)
	~HPhase ()

Private Member Functions
void	ProcessPhi (HPhi *phi)
	DISALLOW_COPY_AND_ASSIGN (HMarkDeoptimizeOnUndefinedPhase)

Private Attributes
ZoneList< HPhi * >	worklist_

Additional Inherited Members
Protected Member Functions inherited from v8::internal::HPhase
HGraph *	graph () const

Detailed Description

Definition at line 19 of file hydrogen-mark-deoptimize.h.

Constructor & Destructor Documentation

HMarkDeoptimizeOnUndefinedPhase()

v8::internal::HMarkDeoptimizeOnUndefinedPhase::HMarkDeoptimizeOnUndefinedPhase ( HGraph *  graph )

inlineexplicit

Definition at line 21 of file hydrogen-mark-deoptimize.h.

      : HPhase("H_Mark deoptimize on undefined", graph),
        worklist_(16, zone()) {}

Member Function Documentation

DISALLOW_COPY_AND_ASSIGN()

v8::internal::HMarkDeoptimizeOnUndefinedPhase::DISALLOW_COPY_AND_ASSIGN ( HMarkDeoptimizeOnUndefinedPhase  )

private

ProcessPhi()

void v8::internal::HMarkDeoptimizeOnUndefinedPhase::ProcessPhi ( HPhi *  phi )

private

Definition at line 22 of file hydrogen-mark-deoptimize.cc.

                                                          {
  DCHECK(phi->CheckFlag(HValue::kAllowUndefinedAsNaN));
  DCHECK(worklist_.is_empty());
 
  // Push the phi onto the worklist
  phi->ClearFlag(HValue::kAllowUndefinedAsNaN);
  worklist_.Add(phi, zone());
 
  // Process all phis that can reach this phi
  while (!worklist_.is_empty()) {
    phi = worklist_.RemoveLast();
    for (int i = phi->OperandCount() - 1; i >= 0; --i) {
      HValue* input = phi->OperandAt(i);
      if (input->IsPhi() && input->CheckFlag(HValue::kAllowUndefinedAsNaN)) {
        input->ClearFlag(HValue::kAllowUndefinedAsNaN);
        worklist_.Add(HPhi::cast(input), zone());
      }
    }
  }
}

References v8::internal::List< T, AllocationPolicy >::Add(), v8::internal::HValue::CheckFlag(), v8::internal::HValue::ClearFlag(), DCHECK, v8::internal::HValue::IsPhi(), v8::internal::HValue::kAllowUndefinedAsNaN, v8::internal::HValue::OperandAt(), and worklist_.

Referenced by Run().

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Run()

void v8::internal::HMarkDeoptimizeOnUndefinedPhase::Run

(

)

Definition at line 10 of file hydrogen-mark-deoptimize.cc.

                                          {
  const ZoneList<HPhi*>* phi_list = graph()->phi_list();
  for (int i = 0; i < phi_list->length(); i++) {
    HPhi* phi = phi_list->at(i);
    if (phi->CheckFlag(HValue::kAllowUndefinedAsNaN) &&
        !phi->CheckUsesForFlag(HValue::kAllowUndefinedAsNaN)) {
      ProcessPhi(phi);
    }
  }
}

References v8::internal::List< T, AllocationPolicy >::at(), v8::internal::HPhase::graph(), v8::internal::HValue::kAllowUndefinedAsNaN, and ProcessPhi().

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Member Data Documentation

worklist_

ZoneList<HPhi*> v8::internal::HMarkDeoptimizeOnUndefinedPhase::worklist_

private

Definition at line 32 of file hydrogen-mark-deoptimize.h.

Referenced by ProcessPhi().

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

• /mnt/V8SourceCode/src/hydrogen-mark-deoptimize.h
• /mnt/V8SourceCode/src/hydrogen-mark-deoptimize.cc