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Fix the order of context binding/simulate insertion for BlockContexts.

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R=jarin@chromium.org
BUG=v8:3741
LOG=N

Review URL: https://codereview.chromium.org/762393008

Cr-Commit-Position: refs/heads/master@{#25684}
This commit is contained in:
dslomov 2014-12-05 05:06:45 -08:00 committed by Commit bot
parent 1150cf7f9a
commit bd04e6cdad
2 changed files with 29 additions and 3 deletions
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6
src/hydrogen.cc
View File

@ -4573,11 +4573,11 @@ void HOptimizedGraphBuilder::VisitBlock(Block* stmt) {
HInstruction* inner_context = Add<HAllocateBlockContext>(
outer_context, function, scope->GetScopeInfo());
HInstruction* instr = Add<HStoreFrameContext>(inner_context);
set_scope(scope);
environment()->BindContext(inner_context);
if (instr->HasObservableSideEffects()) {
AddSimulate(stmt->EntryId(), REMOVABLE_SIMULATE);
}
set_scope(scope);
environment()->BindContext(inner_context);
VisitDeclarations(scope->declarations());
AddSimulate(stmt->DeclsId(), REMOVABLE_SIMULATE);
}
@ -4591,10 +4591,10 @@ void HOptimizedGraphBuilder::VisitBlock(Block* stmt) {
HObjectAccess::ForContextSlot(Context::PREVIOUS_INDEX));
HInstruction* instr = Add<HStoreFrameContext>(outer_context);
environment()->BindContext(outer_context);
if (instr->HasObservableSideEffects()) {
AddSimulate(stmt->ExitId(), REMOVABLE_SIMULATE);
}
environment()->BindContext(outer_context);
}
HBasicBlock* break_block = break_info.break_block();
if (break_block != NULL) {

26
test/mjsunit/harmony/regress/regress-3741.js Normal file
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@ -0,0 +1,26 @@
// Copyright 2014 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: --harmony-scoping --allow-natives-syntax
'use strict';
function f24(deopt) {
let x = 1;
{
let x = 2;
{
let x = 3;
assertEquals(3, x);
}
deopt + 1;
assertEquals(2, x);
}
assertEquals(1, x);
}
for (var j = 0; j < 10; ++j) {
f24(12);
}
%OptimizeFunctionOnNextCall(f24);
f24({});