Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

[v10.x] deps: V8: backport f27ac28 #28061

Closed
wants to merge 1 commit into from
Closed

[v10.x] deps: V8: backport f27ac28 #28061

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion common.gypi
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,7 @@

# Reset this number to 0 on major V8 upgrades.
# Increment by one for each non-official patch applied to deps/v8.
'v8_embedder_string': '-node.52',
'v8_embedder_string': '-node.53',

# Enable disassembler for `--print-code` v8 options
'v8_enable_disassembler': 1,
Expand Down
86 changes: 52 additions & 34 deletions deps/v8/src/compiler/simplified-lowering.cc
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -171,21 +171,6 @@ void ReplaceEffectControlUses(Node* node, Node* effect, Node* control) {
}
}

void ChangeToPureOp(Node* node, const Operator* new_op) {
DCHECK(new_op->HasProperty(Operator::kPure));
if (node->op()->EffectInputCount() > 0) {
DCHECK_LT(0, node->op()->ControlInputCount());
// Disconnect the node from effect and control chains.
Node* control = NodeProperties::GetControlInput(node);
Node* effect = NodeProperties::GetEffectInput(node);
ReplaceEffectControlUses(node, effect, control);
node->TrimInputCount(new_op->ValueInputCount());
} else {
DCHECK_EQ(0, node->op()->ControlInputCount());
}
NodeProperties::ChangeOp(node, new_op);
}

#ifdef DEBUG
// Helpers for monotonicity checking.
class InputUseInfos {
Expand Down Expand Up @@ -750,6 +735,31 @@ class RepresentationSelector {
!GetUpperBound(node->InputAt(1)).Maybe(type);
}

void ChangeToPureOp(Node* node, const Operator* new_op) {
DCHECK(new_op->HasProperty(Operator::kPure));
if (node->op()->EffectInputCount() > 0) {
DCHECK_LT(0, node->op()->ControlInputCount());
Node* control = NodeProperties::GetControlInput(node);
Node* effect = NodeProperties::GetEffectInput(node);
if (TypeOf(node).IsNone()) {
// If the node is unreachable, insert an Unreachable node and mark the
// value dead.
// TODO(jarin,tebbi) Find a way to unify/merge this insertion with
// InsertUnreachableIfNecessary.
Node* unreachable = effect = graph()->NewNode(
jsgraph_->common()->Unreachable(), effect, control);
new_op = jsgraph_->common()->DeadValue(GetInfo(node)->representation());
node->ReplaceInput(0, unreachable);
}
// Rewire the effect and control chains.
node->TrimInputCount(new_op->ValueInputCount());
ReplaceEffectControlUses(node, effect, control);
} else {
DCHECK_EQ(0, node->op()->ControlInputCount());
}
NodeProperties::ChangeOp(node, new_op);
}

// Converts input {index} of {node} according to given UseInfo {use},
// assuming the type of the input is {input_type}. If {input_type} is null,
// it takes the input from the input node {TypeOf(node->InputAt(index))}.
Expand Down Expand Up @@ -1052,6 +1062,15 @@ class RepresentationSelector {
}
}

void MaskShiftOperand(Node* node, Type rhs_type) {
if (!rhs_type.Is(type_cache_.kZeroToThirtyOne)) {
Node* const rhs = NodeProperties::GetValueInput(node, 1);
node->ReplaceInput(1,
graph()->NewNode(jsgraph_->machine()->Word32And(), rhs,
jsgraph_->Int32Constant(0x1F)));
}
}

static MachineSemantic DeoptValueSemanticOf(Type type) {
// We only need signedness to do deopt correctly.
if (type.Is(Type::Signed32())) {
Expand Down Expand Up @@ -1996,7 +2015,8 @@ class RepresentationSelector {
VisitBinop(node, UseInfo::TruncatingWord32(),
UseInfo::TruncatingWord32(), MachineRepresentation::kWord32);
if (lower()) {
lowering->DoShift(node, lowering->machine()->Word32Shl(), rhs_type);
MaskShiftOperand(node, rhs_type);
ChangeToPureOp(node, lowering->machine()->Word32Shl());
}
return;
}
Expand All @@ -2007,7 +2027,8 @@ class RepresentationSelector {
UseInfo::TruncatingWord32(),
MachineRepresentation::kWord32);
if (lower()) {
lowering->DoShift(node, lowering->machine()->Word32Shl(), rhs_type);
MaskShiftOperand(node, rhs_type);
ChangeToPureOp(node, lowering->machine()->Word32Shl());
}
return;
}
Expand All @@ -2016,7 +2037,8 @@ class RepresentationSelector {
VisitBinop(node, CheckedUseInfoAsWord32FromHint(hint),
MachineRepresentation::kWord32, Type::Signed32());
if (lower()) {
lowering->DoShift(node, lowering->machine()->Word32Shl(), rhs_type);
MaskShiftOperand(node, rhs_type);
ChangeToPureOp(node, lowering->machine()->Word32Shl());
}
return;
}
Expand All @@ -2025,7 +2047,8 @@ class RepresentationSelector {
VisitBinop(node, UseInfo::TruncatingWord32(),
UseInfo::TruncatingWord32(), MachineRepresentation::kWord32);
if (lower()) {
lowering->DoShift(node, lowering->machine()->Word32Sar(), rhs_type);
MaskShiftOperand(node, rhs_type);
ChangeToPureOp(node, lowering->machine()->Word32Sar());
}
return;
}
Expand All @@ -2036,7 +2059,8 @@ class RepresentationSelector {
UseInfo::TruncatingWord32(),
MachineRepresentation::kWord32);
if (lower()) {
lowering->DoShift(node, lowering->machine()->Word32Sar(), rhs_type);
MaskShiftOperand(node, rhs_type);
ChangeToPureOp(node, lowering->machine()->Word32Sar());
}
return;
}
Expand All @@ -2045,7 +2069,8 @@ class RepresentationSelector {
VisitBinop(node, CheckedUseInfoAsWord32FromHint(hint),
MachineRepresentation::kWord32, Type::Signed32());
if (lower()) {
lowering->DoShift(node, lowering->machine()->Word32Sar(), rhs_type);
MaskShiftOperand(node, rhs_type);
ChangeToPureOp(node, lowering->machine()->Word32Sar());
}
return;
}
Expand All @@ -2054,7 +2079,8 @@ class RepresentationSelector {
VisitBinop(node, UseInfo::TruncatingWord32(),
UseInfo::TruncatingWord32(), MachineRepresentation::kWord32);
if (lower()) {
lowering->DoShift(node, lowering->machine()->Word32Shr(), rhs_type);
MaskShiftOperand(node, rhs_type);
ChangeToPureOp(node, lowering->machine()->Word32Shr());
}
return;
}
Expand Down Expand Up @@ -2083,14 +2109,16 @@ class RepresentationSelector {
UseInfo::TruncatingWord32(),
MachineRepresentation::kWord32);
if (lower()) {
lowering->DoShift(node, lowering->machine()->Word32Shr(), rhs_type);
MaskShiftOperand(node, rhs_type);
ChangeToPureOp(node, lowering->machine()->Word32Shr());
}
return;
}
VisitBinop(node, CheckedUseInfoAsWord32FromHint(hint),
MachineRepresentation::kWord32, Type::Unsigned32());
if (lower()) {
lowering->DoShift(node, lowering->machine()->Word32Shr(), rhs_type);
MaskShiftOperand(node, rhs_type);
ChangeToPureOp(node, lowering->machine()->Word32Shr());
}
return;
}
Expand Down Expand Up @@ -3787,16 +3815,6 @@ void SimplifiedLowering::DoMin(Node* node, Operator const* op,
NodeProperties::ChangeOp(node, common()->Select(rep));
}

void SimplifiedLowering::DoShift(Node* node, Operator const* op,
Type rhs_type) {
if (!rhs_type.Is(type_cache_.kZeroToThirtyOne)) {
Node* const rhs = NodeProperties::GetValueInput(node, 1);
node->ReplaceInput(1, graph()->NewNode(machine()->Word32And(), rhs,
jsgraph()->Int32Constant(0x1F)));
}
ChangeToPureOp(node, op);
}

void SimplifiedLowering::DoIntegral32ToBit(Node* node) {
Node* const input = node->InputAt(0);
Node* const zero = jsgraph()->Int32Constant(0);
Expand Down
1 change: 0 additions & 1 deletion deps/v8/src/compiler/simplified-lowering.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,6 @@ class V8_EXPORT_PRIVATE SimplifiedLowering final {
Node* node, RepresentationSelector* selector);
void DoJSToNumberOrNumericTruncatesToWord32(Node* node,
RepresentationSelector* selector);
void DoShift(Node* node, Operator const* op, Type rhs_type);
void DoIntegral32ToBit(Node* node);
void DoOrderedNumberToBit(Node* node);
void DoNumberToBit(Node* node);
Expand Down
20 changes: 20 additions & 0 deletions deps/v8/test/mjsunit/compiler/regress-910838.js
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,20 @@
// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Flags: --allow-natives-syntax

function f(b, s, x) {
if (!b) {
return (x ? b : s * undefined) ? 1 : 42;
}
}

function g(b, x) {
return f(b, 'abc', x);
}

f(false, 0, 0);
g(true, 0);
%OptimizeFunctionOnNextCall(g);
assertEquals(42, g(false, 0));