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Unified Diff: runtime/vm/intermediate_language.h

Issue 3003593002: [vm] Cleanup Instruction::Effects(), prepare to cleanup Dependencies() (Closed)
Patch Set: TODO comment corrected Created 3 years, 4 months ago
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Index: runtime/vm/intermediate_language.h
diff --git a/runtime/vm/intermediate_language.h b/runtime/vm/intermediate_language.h
index 461dad6e6dc72b7de8c26a7208dbeb547c87cfd8..9b93c024ae5bcbdaf959a883d6a3262624ce0dc6 100644
--- a/runtime/vm/intermediate_language.h
+++ b/runtime/vm/intermediate_language.h
@@ -178,7 +178,8 @@ class CompileType : public ZoneAllocated {
const AbstractType* type_;
};
-// TODO(alexmarkov): remove EffectSet as there are no tracked effects anymore
+// TODO(dartbug.com/30474): remove EffectSet as there are no tracked effects
+// anymore.
class EffectSet : public ValueObject {
public:
enum Effects {
@@ -872,8 +873,8 @@ class Instruction : public ZoneAllocated {
// Returns true if CSE and LICM are allowed for this instruction.
virtual bool AllowsCSE() const { return false; }
- // Returns set of effects created by this instruction.
- virtual EffectSet Effects() const = 0;
+ // Returns true if this instruction has any side-effects.
+ virtual bool HasSideEffects() const = 0;
Vyacheslav Egorov (Google) 2017/08/22 14:08:39 I would give it a name like HasUnknownSideEffects(
alexmarkov 2017/08/22 15:51:57 Done.
// Returns set of effects that affect this instruction.
virtual EffectSet Dependencies() const {
@@ -986,7 +987,7 @@ class PureInstruction : public Instruction {
virtual bool AllowsCSE() const { return true; }
virtual EffectSet Dependencies() const { return EffectSet::None(); }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
};
// Types to be used as ThrowsTrait for TemplateInstruction/TemplateDefinition.
@@ -1099,9 +1100,9 @@ class ParallelMoveInstr : public TemplateInstruction<0, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const {
+ virtual bool HasSideEffects() const {
UNREACHABLE(); // This instruction never visited by optimization passes.
- return EffectSet::None();
+ return false;
}
virtual EffectSet Dependencies() const {
@@ -1223,7 +1224,7 @@ class BlockEntryInstr : public Instruction {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual EffectSet Dependencies() const { return EffectSet::None(); }
virtual bool MayThrow() const { return false; }
@@ -1469,7 +1470,7 @@ class JoinEntryInstr : public BlockEntryInstr {
void InsertPhi(PhiInstr* phi);
void RemovePhi(PhiInstr* phi);
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual EffectSet Dependencies() const { return EffectSet::None(); }
PRINT_TO_SUPPORT
@@ -1884,7 +1885,7 @@ class PureDefinition : public Definition {
virtual bool AllowsCSE() const { return true; }
virtual EffectSet Dependencies() const { return EffectSet::None(); }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
};
template <intptr_t N,
@@ -1940,7 +1941,7 @@ class PhiInstr : public Definition {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
// Phi is alive if it reaches a non-environment use.
bool is_alive() const { return is_alive_; }
@@ -2034,7 +2035,7 @@ class ParameterInstr : public Definition {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual EffectSet Dependencies() const { return EffectSet::None(); }
virtual intptr_t Hashcode() const {
@@ -2070,7 +2071,7 @@ class PushArgumentInstr : public TemplateDefinition<1, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual TokenPosition token_pos() const {
return TokenPosition::kPushArgument;
@@ -2106,7 +2107,7 @@ class ReturnInstr : public TemplateInstruction<1, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
private:
const TokenPosition token_pos_;
@@ -2127,7 +2128,7 @@ class ThrowInstr : public TemplateInstruction<0, Throws> {
virtual bool ComputeCanDeoptimize() const { return true; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
private:
const TokenPosition token_pos_;
@@ -2155,7 +2156,7 @@ class ReThrowInstr : public TemplateInstruction<0, Throws> {
virtual bool ComputeCanDeoptimize() const { return true; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
private:
const TokenPosition token_pos_;
@@ -2178,7 +2179,7 @@ class StopInstr : public TemplateInstruction<0, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual EffectSet Dependencies() const { return EffectSet::None(); }
@@ -2219,7 +2220,7 @@ class GotoInstr : public TemplateInstruction<0, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
ParallelMoveInstr* parallel_move() const { return parallel_move_; }
@@ -2295,7 +2296,7 @@ class IndirectGotoInstr : public TemplateInstruction<1, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return false; }
virtual bool CanBecomeDeoptimizationTarget() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
Value* offset() const { return inputs_[0]; }
void ComputeOffsetTable();
@@ -2386,7 +2387,7 @@ class PureComparison : public ComparisonInstr {
virtual bool AllowsCSE() const { return true; }
virtual EffectSet Dependencies() const { return EffectSet::None(); }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
protected:
PureComparison(TokenPosition token_pos, Token::Kind kind, intptr_t deopt_id)
@@ -2449,7 +2450,7 @@ class BranchInstr : public Instruction {
return comparison()->CanBecomeDeoptimizationTarget();
}
- virtual EffectSet Effects() const { return comparison()->Effects(); }
+ virtual bool HasSideEffects() const { return comparison()->HasSideEffects(); }
ComparisonInstr* comparison() const { return comparison_; }
void SetComparison(ComparisonInstr* comp);
@@ -2535,7 +2536,7 @@ class RedefinitionInstr : public TemplateDefinition<1, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return false; }
virtual EffectSet Dependencies() const { return EffectSet::None(); }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
private:
CompileType* constrained_type_;
@@ -2555,7 +2556,7 @@ class ConstraintInstr : public TemplateDefinition<1, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual bool AttributesEqual(Instruction* other) const {
UNREACHABLE();
@@ -2732,7 +2733,7 @@ class SpecialParameterInstr : public TemplateDefinition<0, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual EffectSet Dependencies() const { return EffectSet::None(); }
virtual bool AttributesEqual(Instruction* other) const {
return kind() == other->AsSpecialParameter()->kind();
@@ -2842,7 +2843,7 @@ class ClosureCallInstr : public TemplateDartCall<1> {
virtual bool ComputeCanDeoptimize() const { return true; }
- virtual EffectSet Effects() const { return EffectSet::All(); }
+ virtual bool HasSideEffects() const { return true; }
PRINT_OPERANDS_TO_SUPPORT
@@ -2918,7 +2919,7 @@ class InstanceCallInstr : public TemplateDartCall<0> {
return true;
}
- virtual EffectSet Effects() const { return EffectSet::All(); }
+ virtual bool HasSideEffects() const { return true; }
PRINT_OPERANDS_TO_SUPPORT
@@ -2998,7 +2999,7 @@ class PolymorphicInstanceCallInstr : public TemplateDefinition<0, Throws> {
virtual bool ComputeCanDeoptimize() const { return true; }
- virtual EffectSet Effects() const { return EffectSet::All(); }
+ virtual bool HasSideEffects() const { return true; }
virtual Definition* Canonicalize(FlowGraph* graph);
@@ -3254,7 +3255,7 @@ class IfThenElseInstr : public Definition {
intptr_t if_false() const { return if_false_; }
virtual bool AllowsCSE() const { return comparison()->AllowsCSE(); }
- virtual EffectSet Effects() const { return comparison()->Effects(); }
+ virtual bool HasSideEffects() const { return comparison()->HasSideEffects(); }
virtual EffectSet Dependencies() const {
return comparison()->Dependencies();
}
@@ -3370,7 +3371,7 @@ class StaticCallInstr : public TemplateDartCall<0> {
return true;
}
- virtual EffectSet Effects() const { return EffectSet::All(); }
+ virtual bool HasSideEffects() const { return true; }
void set_result_cid(intptr_t value) { result_cid_ = value; }
@@ -3412,9 +3413,9 @@ class LoadLocalInstr : public TemplateDefinition<0, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const {
+ virtual bool HasSideEffects() const {
UNREACHABLE(); // Eliminated by SSA construction.
- return EffectSet::None();
+ return false;
}
void mark_last() { is_last_ = true; }
@@ -3457,9 +3458,9 @@ class DropTempsInstr : public Definition {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const {
+ virtual bool HasSideEffects() const {
UNREACHABLE(); // Eliminated by SSA construction.
- return EffectSet::None();
+ return false;
}
virtual bool MayThrow() const {
@@ -3503,9 +3504,9 @@ class StoreLocalInstr : public TemplateDefinition<1, NoThrow> {
void mark_last() { is_last_ = true; }
bool is_last() const { return is_last_; }
- virtual EffectSet Effects() const {
+ virtual bool HasSideEffects() const {
UNREACHABLE(); // Eliminated by SSA construction.
- return EffectSet::None();
+ return false;
}
virtual TokenPosition token_pos() const { return token_pos_; }
@@ -3555,7 +3556,7 @@ class NativeCallInstr : public TemplateDefinition<0, Throws> {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::All(); }
+ virtual bool HasSideEffects() const { return true; }
void SetupNative();
@@ -3593,7 +3594,7 @@ class DebugStepCheckInstr : public TemplateInstruction<0, NoThrow> {
virtual TokenPosition token_pos() const { return token_pos_; }
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::All(); }
+ virtual bool HasSideEffects() const { return true; }
virtual Instruction* Canonicalize(FlowGraph* flow_graph);
private:
@@ -3664,7 +3665,7 @@ class StoreInstanceFieldInstr : public TemplateDefinition<2, NoThrow> {
// Currently CSE/LICM don't operate on any instructions that can be affected
// by stores/loads. LoadOptimizer handles loads separately. Hence stores
// are marked as having no side-effects.
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
bool IsUnboxedStore() const;
@@ -3771,8 +3772,10 @@ class LoadStaticFieldInstr : public TemplateDefinition<1, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual bool AllowsCSE() const { return StaticField().is_final(); }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool AllowsCSE() const {
+ return StaticField().is_final() && !FLAG_fields_may_be_reset;
+ }
+ virtual bool HasSideEffects() const { return false; }
virtual EffectSet Dependencies() const;
virtual bool AttributesEqual(Instruction* other) const;
@@ -3809,7 +3812,7 @@ class StoreStaticFieldInstr : public TemplateDefinition<1, NoThrow> {
// Currently CSE/LICM don't operate on any instructions that can be affected
// by stores/loads. LoadOptimizer handles loads separately. Hence stores
// are marked as having no side-effects.
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual TokenPosition token_pos() const { return token_pos_; }
@@ -3873,7 +3876,7 @@ class LoadIndexedInstr : public TemplateDefinition<2, NoThrow> {
virtual Representation representation() const;
virtual void InferRange(RangeAnalysis* analysis, Range* range);
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
private:
const intptr_t index_scale_;
@@ -3942,7 +3945,7 @@ class LoadCodeUnitsInstr : public TemplateDefinition<2, NoThrow> {
void set_representation(Representation repr) { representation_ = repr; }
virtual void InferRange(RangeAnalysis* analysis, Range* range);
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
private:
const intptr_t class_id_;
@@ -4013,7 +4016,7 @@ class StringInterpolateInstr : public TemplateDefinition<1, Throws> {
virtual CompileType ComputeType() const;
// Issues a static call to Dart code which calls toString on objects.
- virtual EffectSet Effects() const { return EffectSet::All(); }
+ virtual bool HasSideEffects() const { return true; }
virtual bool ComputeCanDeoptimize() const { return true; }
const Function& CallFunction() const;
@@ -4071,7 +4074,7 @@ class StoreIndexedInstr : public TemplateDefinition<3, NoThrow> {
return GetDeoptId();
}
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
private:
const StoreBarrierType emit_store_barrier_;
@@ -4095,7 +4098,7 @@ class BooleanNegateInstr : public TemplateDefinition<1, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual Definition* Canonicalize(FlowGraph* flow_graph);
@@ -4130,7 +4133,7 @@ class InstanceOfInstr : public TemplateDefinition<3, Throws> {
virtual bool ComputeCanDeoptimize() const { return true; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
PRINT_OPERANDS_TO_SUPPORT
@@ -4175,7 +4178,7 @@ class AllocateObjectInstr : public TemplateDefinition<0, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual AliasIdentity Identity() const { return identity_; }
virtual void SetIdentity(AliasIdentity identity) { identity_ = identity; }
@@ -4209,7 +4212,7 @@ class AllocateUninitializedContextInstr
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual AliasIdentity Identity() const { return identity_; }
virtual void SetIdentity(AliasIdentity identity) { identity_ = identity; }
@@ -4294,7 +4297,7 @@ class MaterializeObjectInstr : public Definition {
}
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
Location* locations() { return locations_; }
void set_locations(Location* locations) { locations_ = locations; }
@@ -4352,7 +4355,7 @@ class CreateArrayInstr : public TemplateDefinition<2, Throws> {
// deoptimize.
virtual bool ComputeCanDeoptimize() const { return MayThrow(); }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual AliasIdentity Identity() const { return identity_; }
virtual void SetIdentity(AliasIdentity identity) { identity_ = identity; }
@@ -4390,7 +4393,7 @@ class LoadUntaggedInstr : public TemplateDefinition<1, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual bool AttributesEqual(Instruction* other) const { return true; }
private:
@@ -4507,7 +4510,7 @@ class LoadFieldInstr : public TemplateDefinition<1, NoThrow> {
static bool IsFixedLengthArrayCid(intptr_t cid);
virtual bool AllowsCSE() const { return immutable_; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual EffectSet Dependencies() const;
virtual bool AttributesEqual(Instruction* other) const;
@@ -4548,7 +4551,7 @@ class InstantiateTypeInstr : public TemplateDefinition<2, Throws> {
virtual bool ComputeCanDeoptimize() const { return true; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
PRINT_OPERANDS_TO_SUPPORT
@@ -4586,7 +4589,7 @@ class InstantiateTypeArgumentsInstr : public TemplateDefinition<2, Throws> {
virtual bool ComputeCanDeoptimize() const { return true; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual Definition* Canonicalize(FlowGraph* flow_graph);
@@ -4613,7 +4616,7 @@ class AllocateContextInstr : public TemplateDefinition<0, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
PRINT_OPERANDS_TO_SUPPORT
@@ -4638,7 +4641,7 @@ class InitStaticFieldInstr : public TemplateInstruction<1, Throws> {
DECLARE_INSTRUCTION(InitStaticField)
virtual bool ComputeCanDeoptimize() const { return true; }
- virtual EffectSet Effects() const { return EffectSet::All(); }
+ virtual bool HasSideEffects() const { return true; }
virtual Instruction* Canonicalize(FlowGraph* flow_graph);
private:
@@ -4664,7 +4667,7 @@ class CloneContextInstr : public TemplateDefinition<1, NoThrow> {
virtual bool ComputeCanDeoptimize() const { return true; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
private:
const TokenPosition token_pos_;
@@ -6743,7 +6746,7 @@ class CheckedSmiOpInstr : public TemplateDefinition<2, Throws> {
virtual bool ComputeCanDeoptimize() const { return false; }
- virtual EffectSet Effects() const { return EffectSet::All(); }
+ virtual bool HasSideEffects() const { return true; }
virtual Definition* Canonicalize(FlowGraph* flow_graph);
@@ -6784,7 +6787,7 @@ class CheckedSmiComparisonInstr : public TemplateComparison<2, Throws> {
bool is_negated() const { return is_negated_; }
- virtual EffectSet Effects() const { return EffectSet::All(); }
+ virtual bool HasSideEffects() const { return true; }
PRINT_OPERANDS_TO_SUPPORT
@@ -7180,7 +7183,7 @@ class CheckStackOverflowInstr : public TemplateInstruction<0, NoThrow> {
virtual Instruction* Canonicalize(FlowGraph* flow_graph);
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
PRINT_OPERANDS_TO_SUPPORT
@@ -7292,7 +7295,7 @@ class DoubleToIntegerInstr : public TemplateDefinition<1, Throws> {
virtual bool ComputeCanDeoptimize() const { return true; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
private:
InstanceCallInstr* instance_call_;
@@ -7613,7 +7616,7 @@ class CheckClassInstr : public TemplateInstruction<1, NoThrow> {
virtual bool AllowsCSE() const { return true; }
virtual EffectSet Dependencies() const { return EffectSet::None(); }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual bool AttributesEqual(Instruction* other) const;
bool licm_hoisted() const { return licm_hoisted_; }
@@ -7693,7 +7696,7 @@ class CheckClassIdInstr : public TemplateInstruction<1, NoThrow> {
virtual bool AllowsCSE() const { return true; }
virtual EffectSet Dependencies() const { return EffectSet::None(); }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual bool AttributesEqual(Instruction* other) const { return true; }
PRINT_OPERANDS_TO_SUPPORT
@@ -7759,7 +7762,7 @@ class GenericCheckBoundInstr : public TemplateInstruction<2, Throws, NoCSE> {
Value* length() const { return inputs_[kLengthPos]; }
Value* index() const { return inputs_[kIndexPos]; }
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual EffectSet Dependencies() const { return EffectSet::None(); }
DECLARE_INSTRUCTION(GenericCheckBound)
@@ -7810,7 +7813,7 @@ class UnboxedIntConverterInstr : public TemplateDefinition<1, NoThrow> {
return from();
}
- virtual EffectSet Effects() const { return EffectSet::None(); }
+ virtual bool HasSideEffects() const { return false; }
virtual EffectSet Dependencies() const { return EffectSet::None(); }
virtual bool AttributesEqual(Instruction* other) const {
ASSERT(other->IsUnboxedIntConverter());
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