#include <hydrogen-check-elimination.h>

Inheritance diagram for v8::internal::HCheckEliminationPhase:

Collaboration diagram for v8::internal::HCheckEliminationPhase:

Public Member Functions
	HCheckEliminationPhase (HGraph *graph)

void	Run ()

Public Member Functions inherited from v8::internal::HPhase
	HPhase (const char name, HGraph graph)

	~HPhase ()

Private Member Functions
const UniqueSet< Map > *	string_maps () const

void	PrintStats ()

Private Attributes
HAliasAnalyzer *	aliasing_

UniqueSet< Map >	string_maps_

Static Private Attributes
static const int	kStringMapsSize = 0 STRING_TYPE_LIST(COUNT)

Friends
class	HCheckTable

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

Detailed Description

Definition at line 16 of file hydrogen-check-elimination.h.

Constructor & Destructor Documentation

◆ HCheckEliminationPhase()

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

inlineexplicit

Definition at line 18 of file hydrogen-check-elimination.h.

       : HPhase("H_Check Elimination", graph), aliasing_(),
         string_maps_(kStringMapsSize, zone()) {
     // Compute the set of string maps.
     #define ADD_STRING_MAP(type, size, name, Name)                  \
       string_maps_.Add(Unique<Map>::CreateImmovable(                \
               graph->isolate()->factory()->name##_map()), zone());
     STRING_TYPE_LIST(ADD_STRING_MAP)
     #undef ADD_STRING_MAP
     DCHECK_EQ(kStringMapsSize, string_maps_.size());
 #ifdef DEBUG
     redundant_ = 0;
     removed_ = 0;
     removed_cho_ = 0;
     removed_cit_ = 0;
     narrowed_ = 0;
     loads_ = 0;
     empty_ = 0;
     compares_true_ = 0;
     compares_false_ = 0;
     transitions_ = 0;
 #endif
   }

References ADD_STRING_MAP, DCHECK_EQ, kStringMapsSize, string_maps_, and STRING_TYPE_LIST.

Member Function Documentation

◆ PrintStats()

void v8::internal::HCheckEliminationPhase::PrintStats ( )

private

Definition at line 885 of file hydrogen-check-elimination.cc.

                                         {
 #if DEBUG
   #define PRINT_STAT(x) if (x##_ > 0) PrintF(" %-16s = %2d\n", #x, x##_)
 #else
   #define PRINT_STAT(x)
 #endif
   PRINT_STAT(redundant);
   PRINT_STAT(removed);
   PRINT_STAT(removed_cho);
   PRINT_STAT(removed_cit);
   PRINT_STAT(narrowed);
   PRINT_STAT(loads);
   PRINT_STAT(empty);
   PRINT_STAT(compares_true);
   PRINT_STAT(compares_false);
   PRINT_STAT(transitions);
 }

References PRINT_STAT.

Referenced by Run().

Here is the caller graph for this function:

◆ Run()

void v8::internal::HCheckEliminationPhase::Run ( )

Definition at line 865 of file hydrogen-check-elimination.cc.

                                  {
   HFlowEngine<HCheckTable, HCheckMapsEffects> engine(graph(), zone());
   HCheckTable* table = new(zone()) HCheckTable(this);
  
   if (GLOBAL) {
     // Perform a global analysis.
     engine.AnalyzeDominatedBlocks(graph()->blocks()->at(0), table);
   } else {
     // Perform only local analysis.
     for (int i = 0; i < graph()->blocks()->length(); i++) {
       table->Kill();
       engine.AnalyzeOneBlock(graph()->blocks()->at(i), table);
     }
   }
  
   if (FLAG_trace_check_elimination) PrintStats();
 }