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v8::internal::compiler::SwitchBuilder Class Reference

#include <control-builders.h>

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Public Member Functions

 SwitchBuilder (StructuredGraphBuilder *builder, int case_count)
 
void BeginSwitch ()
 
void BeginLabel (int index, Node *condition)
 
void EndLabel ()
 
void DefaultAt (int index)
 
void BeginCase (int index)
 
void EndCase ()
 
void EndSwitch ()
 
virtual void Break ()
 
int case_count () const
 
- Public Member Functions inherited from v8::internal::compiler::ControlBuilder
 ControlBuilder (StructuredGraphBuilder *builder)
 
virtual ~ControlBuilder ()
 
virtual void Continue ()
 

Private Attributes

Environment * body_environment_
 
Environment * label_environment_
 
Environment * break_environment_
 
ZoneList< Environment * > body_environments_
 

Additional Inherited Members

- Protected Types inherited from v8::internal::compiler::ControlBuilder
typedef StructuredGraphBuilder Builder
 
typedef StructuredGraphBuilder::Environment Environment
 
- Protected Member Functions inherited from v8::internal::compiler::ControlBuilder
Zone * zone () const
 
Environment * environment ()
 
void set_environment (Environment *env)
 
- Protected Attributes inherited from v8::internal::compiler::ControlBuilder
Builder * builder_
 

Detailed Description

Definition at line 92 of file control-builders.h.

Constructor & Destructor Documentation

◆ SwitchBuilder()

v8::internal::compiler::SwitchBuilder::SwitchBuilder ( StructuredGraphBuilder *  builder,
int  case_count 
)
inlineexplicit

Definition at line 94 of file control-builders.h.

95  : ControlBuilder(builder),
96  body_environment_(NULL),
97  label_environment_(NULL),
98  break_environment_(NULL),
99  body_environments_(case_count, zone()) {}
v8::internal::compiler::ControlBuilder::ControlBuilder
ControlBuilder(StructuredGraphBuilder *builder)
Definition: control-builders.h:23
v8::internal::compiler::SwitchBuilder::body_environments_
ZoneList< Environment * > body_environments_
Definition: control-builders.h:120
NULL
enable harmony numeric enable harmony object literal extensions Optimize object Array DOM strings and string trace pretenuring decisions of HAllocate instructions Enables optimizations which favor memory size over execution speed maximum source size in bytes considered for a single inlining maximum cumulative number of AST nodes considered for inlining trace the tracking of allocation sites deoptimize every n garbage collections perform array bounds checks elimination analyze liveness of environment slots and zap dead values flushes the cache of optimized code for closures on every GC allow uint32 values on optimize frames if they are used only in safe operations track concurrent recompilation artificial compilation delay in ms do not emit check maps for constant values that have a leaf deoptimize the optimized code if the layout of the maps changes enable context specialization in TurboFan execution budget before interrupt is triggered max percentage of megamorphic generic ICs to allow optimization enable use of SAHF instruction if enable use of VFP3 instructions if available enable use of NEON instructions if enable use of SDIV and UDIV instructions if enable use of MLS instructions if enable loading bit constant by means of movw movt instruction enable unaligned accesses for enable use of d16 d31 registers on ARM this requires VFP3 force all emitted branches to be in long enable alignment of csp to bytes on platforms which prefer the register to always be NULL
Definition: flag-definitions.h:407

Member Function Documentation

◆ BeginCase()

void v8::internal::compiler::SwitchBuilder::BeginCase ( int  index)

Definition at line 105 of file control-builders.cc.

105  {
106  set_environment(body_environments_[index]);
107  environment()->Merge(body_environment_);
108 }

References body_environment_, body_environments_, v8::internal::compiler::ControlBuilder::environment(), v8::internal::compiler::StructuredGraphBuilder::Environment::Merge(), and v8::internal::compiler::ControlBuilder::set_environment().

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◆ BeginLabel()

void v8::internal::compiler::SwitchBuilder::BeginLabel ( int  index,
Node *  condition 
)

Definition at line 85 of file control-builders.cc.

85  {
86  builder_->NewBranch(condition);
87  label_environment_ = environment()->CopyForConditional();
88  builder_->NewIfTrue();
89  body_environments_[index] = environment();
90 }

References body_environments_, v8::internal::compiler::ControlBuilder::builder_, v8::internal::compiler::StructuredGraphBuilder::Environment::CopyForConditional(), v8::internal::compiler::ControlBuilder::environment(), label_environment_, v8::internal::compiler::StructuredGraphBuilder::NewBranch(), and v8::internal::compiler::StructuredGraphBuilder::NewIfTrue().

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◆ BeginSwitch()

void v8::internal::compiler::SwitchBuilder::BeginSwitch ( )

Definition at line 77 of file control-builders.cc.

77  {
78  body_environment_ = environment()->CopyAsUnreachable();
79  label_environment_ = environment()->CopyAsUnreachable();
80  break_environment_ = environment()->CopyAsUnreachable();
81  body_environments_.AddBlock(NULL, case_count(), zone());
82 }
v8::internal::List::AddBlock
Vector< T > AddBlock(T value, int count, AllocationPolicy allocator=AllocationPolicy())
Definition: list-inl.h:77

References v8::internal::List< T, AllocationPolicy >::AddBlock(), body_environment_, body_environments_, break_environment_, case_count(), v8::internal::compiler::StructuredGraphBuilder::Environment::CopyAsUnreachable(), v8::internal::compiler::ControlBuilder::environment(), label_environment_, NULL, and v8::internal::compiler::ControlBuilder::zone().

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◆ Break()

void v8::internal::compiler::SwitchBuilder::Break ( )
virtual

Reimplemented from v8::internal::compiler::ControlBuilder.

Definition at line 111 of file control-builders.cc.

111  {
112  break_environment_->Merge(environment());
113  environment()->MarkAsUnreachable();
114 }

References break_environment_, v8::internal::compiler::ControlBuilder::environment(), v8::internal::compiler::StructuredGraphBuilder::Environment::MarkAsUnreachable(), and v8::internal::compiler::StructuredGraphBuilder::Environment::Merge().

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◆ case_count()

int v8::internal::compiler::SwitchBuilder::case_count ( ) const
inline

Definition at line 114 of file control-builders.h.

114 { return body_environments_.capacity(); }

References body_environments_.

Referenced by BeginSwitch().

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◆ DefaultAt()

void v8::internal::compiler::SwitchBuilder::DefaultAt ( int  index)

Definition at line 99 of file control-builders.cc.

99  {
100  label_environment_ = environment()->CopyAsUnreachable();
101  body_environments_[index] = environment();
102 }

References body_environments_, v8::internal::compiler::StructuredGraphBuilder::Environment::CopyAsUnreachable(), v8::internal::compiler::ControlBuilder::environment(), and label_environment_.

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◆ EndCase()

void v8::internal::compiler::SwitchBuilder::EndCase ( )

Definition at line 117 of file control-builders.cc.

117 { body_environment_ = environment(); }

References body_environment_, and v8::internal::compiler::ControlBuilder::environment().

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◆ EndLabel()

void v8::internal::compiler::SwitchBuilder::EndLabel ( )

Definition at line 93 of file control-builders.cc.

93  {
94  set_environment(label_environment_);
95  builder_->NewIfFalse();
96 }

References v8::internal::compiler::ControlBuilder::builder_, label_environment_, v8::internal::compiler::StructuredGraphBuilder::NewIfFalse(), and v8::internal::compiler::ControlBuilder::set_environment().

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◆ EndSwitch()

void v8::internal::compiler::SwitchBuilder::EndSwitch ( )

Definition at line 120 of file control-builders.cc.

120  {
121  break_environment_->Merge(label_environment_);
122  break_environment_->Merge(environment());
123  set_environment(break_environment_);
124 }

References break_environment_, v8::internal::compiler::ControlBuilder::environment(), label_environment_, v8::internal::compiler::StructuredGraphBuilder::Environment::Merge(), and v8::internal::compiler::ControlBuilder::set_environment().

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Member Data Documentation

◆ body_environment_

Environment* v8::internal::compiler::SwitchBuilder::body_environment_
private

Definition at line 117 of file control-builders.h.

Referenced by BeginCase(), BeginSwitch(), and EndCase().

◆ body_environments_

ZoneList<Environment*> v8::internal::compiler::SwitchBuilder::body_environments_
private

Definition at line 120 of file control-builders.h.

Referenced by BeginCase(), BeginLabel(), BeginSwitch(), case_count(), and DefaultAt().

◆ break_environment_

Environment* v8::internal::compiler::SwitchBuilder::break_environment_
private

Definition at line 119 of file control-builders.h.

Referenced by BeginSwitch(), Break(), and EndSwitch().

◆ label_environment_

Environment* v8::internal::compiler::SwitchBuilder::label_environment_
private

Definition at line 118 of file control-builders.h.

Referenced by BeginLabel(), BeginSwitch(), DefaultAt(), EndLabel(), and EndSwitch().

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