dart::CheckStackOverflowInstr Class Reference

#include <il.h>

Inheritance diagram for dart::CheckStackOverflowInstr:

Public Types
enum	Kind { kOsrAndPreemption , kOsrOnly }
Public Types inherited from dart::TemplateInstruction< 0, NoThrow >
using	BaseClass = typename NoCSE< Instruction, PureInstruction >::Base

Public Member Functions
	CheckStackOverflowInstr (const InstructionSource &source, intptr_t stack_depth, intptr_t loop_depth, intptr_t deopt_id, Kind kind)
virtual TokenPosition	token_pos () const
bool	in_loop () const
intptr_t	stack_depth () const
intptr_t	loop_depth () const
virtual bool	ComputeCanDeoptimize () const
virtual bool	ComputeCanDeoptimizeAfterCall () const
virtual Instruction *	Canonicalize (FlowGraph *flow_graph)
virtual bool	HasUnknownSideEffects () const
virtual bool	CanEliminate (const BlockEntryInstr *block) const
virtual bool	UseSharedSlowPathStub (bool is_optimizing) const
Public Member Functions inherited from dart::TemplateInstruction< 0, NoThrow >
	TemplateInstruction (intptr_t deopt_id=DeoptId::kNone)
	TemplateInstruction (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
Protected Attributes inherited from dart::TemplateInstruction< 0, NoThrow >
EmbeddedArray< Value *, N >	inputs_

Detailed Description

Definition at line 9829 of file il.h.

Member Enumeration Documentation

Kind

enum dart::CheckStackOverflowInstr::Kind

Enumerator
kOsrAndPreemption
kOsrOnly

Definition at line 9831 of file il.h.

            {
    // kOsrAndPreemption stack overflow checks are emitted in both unoptimized
    // and optimized versions of the code and they serve as both preemption and
    // OSR entry points.
    kOsrAndPreemption,
 
    // kOsrOnly stack overflow checks are only needed in the unoptimized code
    // because we can't OSR optimized code.
    kOsrOnly,
  };

Constructor & Destructor Documentation

CheckStackOverflowInstr()

dart::CheckStackOverflowInstr::CheckStackOverflowInstr ( const InstructionSource &  source, intptr_t  stack_depth, intptr_t  loop_depth, intptr_t  deopt_id, Kind  kind  )

inline

Definition at line 9842 of file il.h.

      : TemplateInstruction(source, deopt_id),
        token_pos_(source.token_pos),
        stack_depth_(stack_depth),
        loop_depth_(loop_depth),
        kind_(kind) {
    ASSERT(kind != kOsrOnly || loop_depth > 0);
  }

Member Function Documentation

CanEliminate()

virtual bool dart::CheckStackOverflowInstr::CanEliminate ( const BlockEntryInstr *  block ) const

inlinevirtual

Definition at line 9871 of file il.h.

                                                                {
    return false;
  }

Canonicalize()

Instruction * dart::CheckStackOverflowInstr::Canonicalize ( FlowGraph *  flow_graph )

virtual

Definition at line 2644 of file il.cc.

                                                                        {
  switch (kind_) {
    case kOsrAndPreemption:
      return this;
    case kOsrOnly:
      // Don't need OSR entries in the optimized code.
      return nullptr;
  }
 
  // Switch above exhausts all possibilities but some compilers can't figure
  // it out.
  UNREACHABLE();
  return this;
}

ComputeCanDeoptimize()

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

inlinevirtual

Definition at line 9862 of file il.h.

{ return false; }

ComputeCanDeoptimizeAfterCall()

virtual bool dart::CheckStackOverflowInstr::ComputeCanDeoptimizeAfterCall ( ) const

inlinevirtual

Definition at line 9863 of file il.h.

                                                     {
    return !CompilerState::Current().is_aot();
  }

HasUnknownSideEffects()

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

inlinevirtual

Definition at line 9869 of file il.h.

{ return false; }

in_loop()

bool dart::CheckStackOverflowInstr::in_loop ( ) const

inline

Definition at line 9856 of file il.h.

{ return loop_depth_ > 0; }

loop_depth()

intptr_t dart::CheckStackOverflowInstr::loop_depth ( ) const

inline

Definition at line 9858 of file il.h.

{ return loop_depth_; }

stack_depth()

intptr_t dart::CheckStackOverflowInstr::stack_depth ( ) const

inline

Definition at line 9857 of file il.h.

{ return stack_depth_; }

token_pos()

virtual TokenPosition dart::CheckStackOverflowInstr::token_pos ( ) const

inlinevirtual

Definition at line 9855 of file il.h.

{ return token_pos_; }

UseSharedSlowPathStub()

virtual bool dart::CheckStackOverflowInstr::UseSharedSlowPathStub ( bool  is_optimizing ) const

inlinevirtual

Definition at line 9875 of file il.h.

                                                               {
    return SlowPathSharingSupported(is_optimizing);
  }

---

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