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Unified Diff: src/hydrogen.cc

Issue 6929066: First step in letting Crankshaft inline functions with a different context. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: foo Created 9 years, 7 months ago
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Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index a0d783791260f3a96d9d411057548ac471b690b6..741b1d9c2c46c33c06979920a4f620d402e83141 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -2229,14 +2229,21 @@ void HGraphBuilder::SetupScope(Scope* scope) {
// Set the initial values of parameters including "this". "This" has
// parameter index 0.
- int count = scope->num_parameters() + 1;
- for (int i = 0; i < count; ++i) {
+ ASSERT_EQ(scope->num_parameters() + 1, environment()->parameter_count());
+
+ for (int i = 0; i < environment()->parameter_count(); ++i) {
HInstruction* parameter = AddInstruction(new(zone()) HParameter(i));
environment()->Bind(i, parameter);
}
- // Set the initial values of stack-allocated locals.
- for (int i = count; i < environment()->length(); ++i) {
+ // First special is HContext.
+ HInstruction* context = AddInstruction(new(zone()) HContext);
+ environment()->BindContext(context);
+
+ // Initialize specials and locals to undefined.
+ for (int i = environment()->parameter_count() + 1;
+ i < environment()->length();
+ ++i) {
environment()->Bind(i, undefined_constant);
}
@@ -2593,17 +2600,18 @@ void HGraphBuilder::PreProcessOsrEntry(IterationStatement* statement) {
int osr_entry_id = statement->OsrEntryId();
// We want the correct environment at the OsrEntry instruction. Build
// it explicitly. The expression stack should be empty.
- int count = environment()->length();
- ASSERT(count ==
- (environment()->parameter_count() + environment()->local_count()));
- for (int i = 0; i < count; ++i) {
- HUnknownOSRValue* unknown = new(zone()) HUnknownOSRValue;
- AddInstruction(unknown);
- environment()->Bind(i, unknown);
+ ASSERT(environment()->ExpressionStackIsEmpty());
+ for (int i = 0; i < environment()->length(); ++i) {
+ HUnknownOSRValue* osr_value = new(zone()) HUnknownOSRValue;
+ AddInstruction(osr_value);
+ environment()->Bind(i, osr_value);
}
AddSimulate(osr_entry_id);
AddInstruction(new(zone()) HOsrEntry(osr_entry_id));
+ HContext* context = new(zone()) HContext;
+ AddInstruction(context);
+ environment()->BindContext(context);
current_block()->Goto(loop_predecessor);
loop_predecessor->SetJoinId(statement->EntryId());
set_current_block(loop_predecessor);
@@ -2886,12 +2894,12 @@ HGraphBuilder::GlobalPropertyAccess HGraphBuilder::LookupGlobalProperty(
HValue* HGraphBuilder::BuildContextChainWalk(Variable* var) {
ASSERT(var->IsContextSlot());
- HInstruction* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
int length = info()->scope()->ContextChainLength(var->scope());
while (length-- > 0) {
- context = new(zone()) HOuterContext(context);
- AddInstruction(context);
+ HInstruction* context_instruction = new(zone()) HOuterContext(context);
+ AddInstruction(context_instruction);
+ context = context_instruction;
}
return context;
}
@@ -2930,8 +2938,7 @@ void HGraphBuilder::VisitVariableProxy(VariableProxy* expr) {
HLoadGlobalCell* instr = new(zone()) HLoadGlobalCell(cell, check_hole);
ast_context()->ReturnInstruction(instr, expr->id());
} else {
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
HGlobalObject* global_object = new(zone()) HGlobalObject(context);
AddInstruction(global_object);
HLoadGlobalGeneric* instr =
@@ -2974,8 +2981,7 @@ void HGraphBuilder::VisitObjectLiteral(ObjectLiteral* expr) {
ASSERT(!HasStackOverflow());
ASSERT(current_block() != NULL);
ASSERT(current_block()->HasPredecessor());
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
HObjectLiteral* literal =
new(zone()) HObjectLiteral(context,
expr->constant_properties(),
@@ -3157,8 +3163,7 @@ HInstruction* HGraphBuilder::BuildStoreNamedField(HValue* object,
HInstruction* HGraphBuilder::BuildStoreNamedGeneric(HValue* object,
Handle<String> name,
HValue* value) {
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
return new(zone()) HStoreNamedGeneric(
context,
object,
@@ -3334,8 +3339,7 @@ void HGraphBuilder::HandleGlobalVariableAssignment(Variable* var,
AddInstruction(instr);
if (instr->HasSideEffects()) AddSimulate(ast_id);
} else {
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
HGlobalObject* global_object = new(zone()) HGlobalObject(context);
AddInstruction(global_object);
HStoreGlobalGeneric* instr =
@@ -3560,8 +3564,7 @@ HInstruction* HGraphBuilder::BuildLoadNamedGeneric(HValue* obj,
Property* expr) {
ASSERT(expr->key()->IsPropertyName());
Handle<Object> name = expr->key()->AsLiteral()->handle();
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
return new(zone()) HLoadNamedGeneric(context, obj, name);
}
@@ -3591,8 +3594,7 @@ HInstruction* HGraphBuilder::BuildLoadNamed(HValue* obj,
HInstruction* HGraphBuilder::BuildLoadKeyedGeneric(HValue* object,
HValue* key) {
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
return new(zone()) HLoadKeyedGeneric(context, object, key);
}
@@ -3667,8 +3669,7 @@ HInstruction* HGraphBuilder::BuildLoadKeyed(HValue* obj,
HInstruction* HGraphBuilder::BuildStoreKeyedGeneric(HValue* object,
HValue* key,
HValue* value) {
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
return new(zone()) HStoreKeyedGeneric(
context,
object,
@@ -3921,8 +3922,7 @@ void HGraphBuilder::HandlePolymorphicCallNamed(Call* expr,
if (count == types->length() && FLAG_deoptimize_uncommon_cases) {
current_block()->FinishExitWithDeoptimization();
} else {
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
HCallNamed* call = new(zone()) HCallNamed(context, name, argument_count);
call->set_position(expr->position());
PreProcessCall(call);
@@ -4349,8 +4349,7 @@ void HGraphBuilder::VisitCall(Call* expr) {
CHECK_ALIVE(VisitExpressions(expr->arguments()));
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
call = PreProcessCall(
new(zone()) HCallKeyed(context, key, argument_count));
call->set_position(expr->position());
@@ -4389,8 +4388,7 @@ void HGraphBuilder::VisitCall(Call* expr) {
// When the target has a custom call IC generator, use the IC,
// because it is likely to generate better code. Also use the IC
// when a primitive receiver check is required.
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
call = PreProcessCall(
new(zone()) HCallNamed(context, name, argument_count));
} else {
@@ -4407,8 +4405,7 @@ void HGraphBuilder::VisitCall(Call* expr) {
return;
} else {
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
call = PreProcessCall(
new(zone()) HCallNamed(context, name, argument_count));
}
@@ -4437,9 +4434,8 @@ void HGraphBuilder::VisitCall(Call* expr) {
if (known_global_function) {
// Push the global object instead of the global receiver because
// code generated by the full code generator expects it.
- HContext* context = new(zone()) HContext;
+ HValue* context = environment()->LookupContext();
HGlobalObject* global_object = new(zone()) HGlobalObject(context);
- AddInstruction(context);
PushAndAdd(global_object);
CHECK_ALIVE(VisitExpressions(expr->arguments()));
@@ -4461,8 +4457,7 @@ void HGraphBuilder::VisitCall(Call* expr) {
call = PreProcessCall(new(zone()) HCallKnownGlobal(expr->target(),
argument_count));
} else {
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
PushAndAdd(new(zone()) HGlobalObject(context));
CHECK_ALIVE(VisitExpressions(expr->arguments()));
@@ -4472,9 +4467,8 @@ void HGraphBuilder::VisitCall(Call* expr) {
}
} else {
- HContext* context = new(zone()) HContext;
+ HValue* context = environment()->LookupContext();
HGlobalObject* global_object = new(zone()) HGlobalObject(context);
- AddInstruction(context);
AddInstruction(global_object);
PushAndAdd(new(zone()) HGlobalReceiver(global_object));
CHECK_ALIVE(VisitExpressions(expr->arguments()));
@@ -4497,8 +4491,7 @@ void HGraphBuilder::VisitCallNew(CallNew* expr) {
CHECK_ALIVE(VisitForValue(expr->expression()));
CHECK_ALIVE(VisitExpressions(expr->arguments()));
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
// The constructor is both an operand to the instruction and an argument
// to the construct call.
@@ -5121,8 +5114,7 @@ void HGraphBuilder::VisitCompareOperation(CompareOperation* expr) {
// If the target is not null we have found a known global function that is
// assumed to stay the same for this instanceof.
if (target.is_null()) {
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
instr = new(zone()) HInstanceOf(context, left, right);
} else {
AddInstruction(new(zone()) HCheckFunction(right, target));
@@ -5398,8 +5390,7 @@ void HGraphBuilder::GenerateRandomHeapNumber(CallRuntime* call) {
void HGraphBuilder::GenerateStringAdd(CallRuntime* call) {
ASSERT_EQ(2, call->arguments()->length());
CHECK_ALIVE(VisitArgumentList(call->arguments()));
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
HCallStub* result = new(zone()) HCallStub(context, CodeStub::StringAdd, 2);
Drop(2);
ast_context()->ReturnInstruction(result, call->id());
@@ -5410,8 +5401,7 @@ void HGraphBuilder::GenerateStringAdd(CallRuntime* call) {
void HGraphBuilder::GenerateSubString(CallRuntime* call) {
ASSERT_EQ(3, call->arguments()->length());
CHECK_ALIVE(VisitArgumentList(call->arguments()));
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
HCallStub* result = new(zone()) HCallStub(context, CodeStub::SubString, 3);
Drop(3);
ast_context()->ReturnInstruction(result, call->id());
@@ -5422,8 +5412,7 @@ void HGraphBuilder::GenerateSubString(CallRuntime* call) {
void HGraphBuilder::GenerateStringCompare(CallRuntime* call) {
ASSERT_EQ(2, call->arguments()->length());
CHECK_ALIVE(VisitArgumentList(call->arguments()));
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
HCallStub* result =
new(zone()) HCallStub(context, CodeStub::StringCompare, 2);
Drop(2);
@@ -5435,8 +5424,7 @@ void HGraphBuilder::GenerateStringCompare(CallRuntime* call) {
void HGraphBuilder::GenerateRegExpExec(CallRuntime* call) {
ASSERT_EQ(4, call->arguments()->length());
CHECK_ALIVE(VisitArgumentList(call->arguments()));
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
HCallStub* result = new(zone()) HCallStub(context, CodeStub::RegExpExec, 4);
Drop(4);
ast_context()->ReturnInstruction(result, call->id());
@@ -5447,8 +5435,7 @@ void HGraphBuilder::GenerateRegExpExec(CallRuntime* call) {
void HGraphBuilder::GenerateRegExpConstructResult(CallRuntime* call) {
ASSERT_EQ(3, call->arguments()->length());
CHECK_ALIVE(VisitArgumentList(call->arguments()));
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
HCallStub* result =
new(zone()) HCallStub(context, CodeStub::RegExpConstructResult, 3);
Drop(3);
@@ -5466,8 +5453,7 @@ void HGraphBuilder::GenerateGetFromCache(CallRuntime* call) {
void HGraphBuilder::GenerateNumberToString(CallRuntime* call) {
ASSERT_EQ(1, call->arguments()->length());
CHECK_ALIVE(VisitArgumentList(call->arguments()));
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
HCallStub* result =
new(zone()) HCallStub(context, CodeStub::NumberToString, 1);
Drop(1);
@@ -5494,8 +5480,7 @@ void HGraphBuilder::GenerateCallFunction(CallRuntime* call) {
}
CHECK_ALIVE(VisitForValue(call->arguments()->last()));
HValue* function = Pop();
- HContext* context = new HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
HInvokeFunction* result =
new(zone()) HInvokeFunction(context, function, arg_count);
Drop(arg_count);
@@ -5518,8 +5503,7 @@ void HGraphBuilder::GenerateMathPow(CallRuntime* call) {
void HGraphBuilder::GenerateMathSin(CallRuntime* call) {
ASSERT_EQ(1, call->arguments()->length());
CHECK_ALIVE(VisitArgumentList(call->arguments()));
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
HCallStub* result =
new(zone()) HCallStub(context, CodeStub::TranscendentalCache, 1);
result->set_transcendental_type(TranscendentalCache::SIN);
@@ -5531,8 +5515,7 @@ void HGraphBuilder::GenerateMathSin(CallRuntime* call) {
void HGraphBuilder::GenerateMathCos(CallRuntime* call) {
ASSERT_EQ(1, call->arguments()->length());
CHECK_ALIVE(VisitArgumentList(call->arguments()));
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
HCallStub* result =
new(zone()) HCallStub(context, CodeStub::TranscendentalCache, 1);
result->set_transcendental_type(TranscendentalCache::COS);
@@ -5544,8 +5527,7 @@ void HGraphBuilder::GenerateMathCos(CallRuntime* call) {
void HGraphBuilder::GenerateMathLog(CallRuntime* call) {
ASSERT_EQ(1, call->arguments()->length());
CHECK_ALIVE(VisitArgumentList(call->arguments()));
- HContext* context = new(zone()) HContext;
- AddInstruction(context);
+ HValue* context = environment()->LookupContext();
HCallStub* result =
new(zone()) HCallStub(context, CodeStub::TranscendentalCache, 1);
result->set_transcendental_type(TranscendentalCache::LOG);
@@ -5590,6 +5572,7 @@ HEnvironment::HEnvironment(HEnvironment* outer,
values_(0),
assigned_variables_(4),
parameter_count_(0),
+ specials_count_(1),
local_count_(0),
outer_(outer),
pop_count_(0),
@@ -5603,6 +5586,7 @@ HEnvironment::HEnvironment(const HEnvironment* other)
: values_(0),
assigned_variables_(0),
parameter_count_(0),
+ specials_count_(1),
local_count_(0),
outer_(NULL),
pop_count_(0),
@@ -5619,7 +5603,7 @@ void HEnvironment::Initialize(int parameter_count,
local_count_ = local_count;
// Avoid reallocating the temporaries' backing store on the first Push.
- int total = parameter_count + local_count + stack_height;
+ int total = parameter_count + specials_count_ + local_count + stack_height;
values_.Initialize(total + 4);
for (int i = 0; i < total; ++i) values_.Add(NULL);
}
@@ -5678,12 +5662,12 @@ void HEnvironment::Bind(int index, HValue* value) {
bool HEnvironment::HasExpressionAt(int index) const {
- return index >= parameter_count_ + local_count_;
+ return index >= parameter_count_ + specials_count_ + local_count_;
}
bool HEnvironment::ExpressionStackIsEmpty() const {
- int first_expression = parameter_count() + local_count();
+ int first_expression = parameter_count() + specials_count() + local_count();
ASSERT(length() >= first_expression);
return length() == first_expression;
}
@@ -5761,12 +5745,9 @@ HEnvironment* HEnvironment::CopyForInlining(Handle<JSFunction> target,
inner->SetValueAt(i, push);
}
}
-
- // Initialize the stack-allocated locals to undefined.
- int local_base = arity + 1;
- int local_count = function->scope()->num_stack_slots();
- for (int i = 0; i < local_count; ++i) {
- inner->SetValueAt(local_base + i, undefined);
+ inner->SetValueAt(arity + 1, outer->LookupContext());
+ for (int i = arity + 2; i < inner->length(); ++i) {
+ inner->SetValueAt(i, undefined);
}
inner->set_ast_id(AstNode::kFunctionEntryId);
@@ -5777,8 +5758,11 @@ HEnvironment* HEnvironment::CopyForInlining(Handle<JSFunction> target,
void HEnvironment::PrintTo(StringStream* stream) {
for (int i = 0; i < length(); i++) {
if (i == 0) stream->Add("parameters\n");
- if (i == parameter_count()) stream->Add("locals\n");
- if (i == parameter_count() + local_count()) stream->Add("expressions");
+ if (i == parameter_count()) stream->Add("specials\n");
+ if (i == parameter_count() + specials_count()) stream->Add("locals\n");
+ if (i == parameter_count() + specials_count() + local_count()) {
+ stream->Add("expressions");
+ }
HValue* val = values_.at(i);
stream->Add("%d: ", i);
if (val != NULL) {
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