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Check elimination did not mark some dead blocks.

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R=danno@chromium.org

Review URL: https://codereview.chromium.org/180483003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19619 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
ishell@chromium.org 2014-02-28 14:16:38 +00:00
parent 40ffba58a4
commit c2601aea8a
2 changed files with 107 additions and 6 deletions
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24
src/hydrogen-check-elimination.cc
View File

@ -137,6 +137,12 @@ class HCheckTable : public ZoneObject {
Zone* zone) {
if (state == NULL) {
block->MarkUnreachable();
} else if (block->IsUnreachable()) {
state = NULL;
}
if (FLAG_trace_check_elimination) {
PrintF("Processing B%d, checkmaps-table:\n", block->block_id());
Print(state);
}
return state;
}
@ -147,6 +153,7 @@ class HCheckTable : public ZoneObject {
HCheckTable* copy = new(phase_->zone()) HCheckTable(phase_);
for (int i = 0; i < size_; i++) {
HCheckTableEntry* old_entry = &entries_[i];
ASSERT(old_entry->maps_->size() > 0);
HCheckTableEntry* new_entry = &copy->entries_[i];
new_entry->object_ = old_entry->object_;
new_entry->maps_ = old_entry->maps_->Copy(phase_->zone());
@ -236,7 +243,7 @@ class HCheckTable : public ZoneObject {
succ->block_id(),
learned ? "learned" : "copied",
from_block->block_id());
copy->Print();
Print(copy);
}
return copy;
@ -283,7 +290,7 @@ class HCheckTable : public ZoneObject {
if (FLAG_trace_check_elimination) {
PrintF("B%d checkmaps-table merged with B%d table:\n",
succ->block_id(), pred_block->block_id());
Print();
Print(this);
}
return this;
}
@ -346,7 +353,7 @@ class HCheckTable : public ZoneObject {
}
if (FLAG_trace_check_elimination) {
Print();
Print(this);
}
INC_STAT(narrowed_);
}
@ -540,9 +547,14 @@ class HCheckTable : public ZoneObject {
cursor_ = size_; // Move cursor to end.
}
void Print() {
for (int i = 0; i < size_; i++) {
HCheckTableEntry* entry = &entries_[i];
static void Print(HCheckTable* table) {
if (table == NULL) {
PrintF(" unreachable\n");
return;
}
for (int i = 0; i < table->size_; i++) {
HCheckTableEntry* entry = &table->entries_[i];
ASSERT(entry->object_ != NULL);
PrintF(" checkmaps-table @%d: %s #%d ", i,
entry->object_->IsPhi() ? "phi" : "object", entry->object_->id());

89
test/mjsunit/regress/regress-347914.js Normal file
View File

@ -0,0 +1,89 @@
// 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: --allow-natives-syntax --debug-code --gc-interval=201 --verify-heap --max-inlined-source-size=999999 --max-inlined-nodes=999999 --max-inlined-nodes-cumulative=999999
// Begin stripped down and modified version of mjsunit.js for easy minimization in CF.
function MjsUnitAssertionError(message) {}
MjsUnitAssertionError.prototype.toString = function () { return this.message; };
var assertSame;
var assertEquals;
var assertEqualsDelta;
var assertArrayEquals;
var assertPropertiesEqual;
var assertToStringEquals;
var assertTrue;
var assertFalse;
var triggerAssertFalse;
var assertNull;
var assertNotNull;
var assertThrows;
var assertDoesNotThrow;
var assertInstanceof;
var assertUnreachable;
var assertOptimized;
var assertUnoptimized;
function classOf(object) { var string = Object.prototype.toString.call(object); return string.substring(8, string.length - 1); }
function PrettyPrint(value) { return ""; }
function PrettyPrintArrayElement(value, index, array) { return ""; }
function fail(expectedText, found, name_opt) { }
function deepObjectEquals(a, b) { var aProps = Object.keys(a); aProps.sort(); var bProps = Object.keys(b); bProps.sort(); if (!deepEquals(aProps, bProps)) { return false; } for (var i = 0; i < aProps.length; i++) { if (!deepEquals(a[aProps[i]], b[aProps[i]])) { return false; } } return true; }
function deepEquals(a, b) { if (a === b) { if (a === 0) return (1 / a) === (1 / b); return true; } if (typeof a != typeof b) return false; if (typeof a == "number") return isNaN(a) && isNaN(b); if (typeof a !== "object" && typeof a !== "function") return false; var objectClass = classOf(a); if (objectClass !== classOf(b)) return false; if (objectClass === "RegExp") { return (a.toString() === b.toString()); } if (objectClass === "Function") return false; if (objectClass === "Array") { var elementCount = 0; if (a.length != b.length) { return false; } for (var i = 0; i < a.length; i++) { if (!deepEquals(a[i], b[i])) return false; } return true; } if (objectClass == "String" || objectClass == "Number" || objectClass == "Boolean" || objectClass == "Date") { if (a.valueOf() !== b.valueOf()) return false; } return deepObjectEquals(a, b); }
assertSame = function assertSame(expected, found, name_opt) { if (found === expected) { if (expected !== 0 || (1 / expected) == (1 / found)) return; } else if ((expected !== expected) && (found !== found)) { return; } fail(PrettyPrint(expected), found, name_opt); }; assertEquals = function assertEquals(expected, found, name_opt) { if (!deepEquals(found, expected)) { fail(PrettyPrint(expected), found, name_opt); } };
assertEqualsDelta = function assertEqualsDelta(expected, found, delta, name_opt) { assertTrue(Math.abs(expected - found) <= delta, name_opt); }; assertArrayEquals = function assertArrayEquals(expected, found, name_opt) { var start = ""; if (name_opt) { start = name_opt + " - "; } assertEquals(expected.length, found.length, start + "array length"); if (expected.length == found.length) { for (var i = 0; i < expected.length; ++i) { assertEquals(expected[i], found[i], start + "array element at index " + i); } } };
assertPropertiesEqual = function assertPropertiesEqual(expected, found, name_opt) { if (!deepObjectEquals(expected, found)) { fail(expected, found, name_opt); } };
assertToStringEquals = function assertToStringEquals(expected, found, name_opt) { if (expected != String(found)) { fail(expected, found, name_opt); } };
assertTrue = function assertTrue(value, name_opt) { assertEquals(true, value, name_opt); };
assertFalse = function assertFalse(value, name_opt) { assertEquals(false, value, name_opt); };
assertNull = function assertNull(value, name_opt) { if (value !== null) { fail("null", value, name_opt); } };
assertNotNull = function assertNotNull(value, name_opt) { if (value === null) { fail("not null", value, name_opt); } };
as1sertThrows = function assertThrows(code, type_opt, cause_opt) { var threwException = true; try { if (typeof code == 'function') { code(); } else { eval(code); } threwException = false; } catch (e) { if (typeof type_opt == 'function') { assertInstanceof(e, type_opt); } if (arguments.length >= 3) { assertEquals(e.type, cause_opt); } return; } };
assertInstanceof = function assertInstanceof(obj, type) { if (!(obj instanceof type)) { var actualTypeName = null; var actualConstructor = Object.getPrototypeOf(obj).constructor; if (typeof actualConstructor == "function") { actualTypeName = actualConstructor.name || String(actualConstructor); } fail("Object <" + PrettyPrint(obj) + "> is not an instance of <" + (type.name || type) + ">" + (actualTypeName ? " but of < " + actualTypeName + ">" : "")); } };
assertDoesNotThrow = function assertDoesNotThrow(code, name_opt) { try { if (typeof code == 'function') { code(); } else { eval(code); } } catch (e) { fail("threw an exception: ", e.message || e, name_opt); } };
assertUnreachable = function assertUnreachable(name_opt) { var message = "Fail" + "ure: unreachable"; if (name_opt) { message += " - " + name_opt; } };
var OptimizationStatus;
try { OptimizationStatus = new Function("fun", "sync", "return %GetOptimizationStatus(fun, sync);"); } catch (e) { OptimizationStatus = function() { } }
assertUnoptimized = function assertUnoptimized(fun, sync_opt, name_opt) { if (sync_opt === undefined) sync_opt = ""; assertTrue(OptimizationStatus(fun, sync_opt) != 1, name_opt); }
assertOptimized = function assertOptimized(fun, sync_opt, name_opt) { if (sync_opt === undefined) sync_opt = ""; assertTrue(OptimizationStatus(fun, sync_opt) != 2, name_opt); }
triggerAssertFalse = function() { }
// End stripped down and modified version of mjsunit.js.
var __v_1 = {};
var __v_2 = {};
var __v_3 = {};
var __v_4 = {};
var __v_5 = {};
var __v_6 = {};
var __v_7 = {};
var __v_8 = {};
var __v_9 = {};
var __v_10 = {};
var __v_0 = 'fisk';
assertEquals('fisk', __v_0);
var __v_0;
assertEquals('fisk', __v_0);
var __v_6 = 'hest';
assertEquals('hest', __v_0);
this.bar = 'fisk';
assertEquals('fisk', __v_1);
__v_1;
assertEquals('fisk', __v_1);
__v_1 = 'hest';
assertEquals('hest', __v_1);
function __f_0(o) {
o.g();
if (!o.g()) {
assertTrue(false);
}
}
__v_4 = {};
__v_4.size = function() { return 42; }
__v_4.g = function() { return this.size(); };
__f_0({g: __v_4.g, size:__v_4.size});
for (var __v_0 = 0; __v_0 < 5; __v_0++) __f_0(__v_4);
%OptimizeFunctionOnNextCall(__f_0);
__f_0(__v_4);
__f_0({g: __v_4.g, size:__v_4.size});