Quellcode-Bibliothek testJitGVN.cpp Sprache: C

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "jit/IonAnalysis.h"
#include "jit/MIRGenerator.h"
#include "jit/MIRGraph.h"
#include "jit/RangeAnalysis.h"
#include "jit/ValueNumbering.h"

#include "jsapi-tests/testJitMinimalFunc.h"
#include "jsapi-tests/tests.h"

using namespace js;
using namespace js::jit;

static MBasicBlock* FollowTrivialGotos(MBasicBlock* block) {
  while (block->phisEmpty() && *block->begin() == block->lastIns() &&
         block->lastIns()->isGoto()) {
    block = block->lastIns()->toGoto()->getSuccessor(0);
  }
  return block;
}

BEGIN_TEST(testJitGVN_FixupOSROnlyLoop) {
  // This is a testcase which constructs the very rare circumstances that
  // require the FixupOSROnlyLoop logic.

  MinimalFunc func;

  MBasicBlock* entry = func.createEntryBlock();
  MBasicBlock* osrEntry = func.createOsrEntryBlock();
  MBasicBlock* outerHeader = func.createBlock(entry);
  MBasicBlock* merge = func.createBlock(outerHeader);
  MBasicBlock* innerHeader = func.createBlock(merge);
  MBasicBlock* innerBackedge = func.createBlock(innerHeader);
  MBasicBlock* outerBackedge = func.createBlock(innerHeader);
  MBasicBlock* exit = func.createBlock(outerHeader);

  MConstant* c = MConstant::New(func.alloc, BooleanValue(false));
  entry->add(c);
  entry->end(MTest::New(func.alloc, c, outerHeader, exit));
  osrEntry->end(MGoto::New(func.alloc, merge));

  merge->end(MGoto::New(func.alloc, innerHeader));

  // Use Beta nodes to hide the constants and suppress folding.
  MConstant* x = MConstant::New(func.alloc, BooleanValue(false));
  outerHeader->add(x);
  MBeta* xBeta =
      MBeta::New(func.alloc, x, Range::NewInt32Range(func.alloc, 0, 1));
  outerHeader->add(xBeta);
  outerHeader->end(MTest::New(func.alloc, xBeta, merge, exit));

  MConstant* y = MConstant::New(func.alloc, BooleanValue(false));
  innerHeader->add(y);
  MBeta* yBeta =
      MBeta::New(func.alloc, y, Range::NewInt32Range(func.alloc, 0, 1));
  innerHeader->add(yBeta);
  innerHeader->end(MTest::New(func.alloc, yBeta, innerBackedge, outerBackedge));

  innerBackedge->end(MGoto::New(func.alloc, innerHeader));
  outerBackedge->end(MGoto::New(func.alloc, outerHeader));

  MConstant* u = MConstant::New(func.alloc, UndefinedValue());
  exit->add(u);
  exit->end(MReturn::New(func.alloc, u));

  MOZ_ALWAYS_TRUE(innerHeader->addPredecessorWithoutPhis(innerBackedge));
  MOZ_ALWAYS_TRUE(outerHeader->addPredecessorWithoutPhis(outerBackedge));
  MOZ_ALWAYS_TRUE(exit->addPredecessorWithoutPhis(entry));
  MOZ_ALWAYS_TRUE(merge->addPredecessorWithoutPhis(osrEntry));

  outerHeader->setLoopHeader(outerBackedge);
  innerHeader->setLoopHeader(innerBackedge);

  if (!func.runGVN()) {
    return false;
  }

  // The loops are no longer reachable from the normal entry. They are
  // doinated by the osrEntry.
  MOZ_RELEASE_ASSERT(func.graph.osrBlock() == osrEntry);
  MBasicBlock* newInner =
      FollowTrivialGotos(osrEntry->lastIns()->toGoto()->target());
  MBasicBlock* newOuter =
      FollowTrivialGotos(newInner->lastIns()->toTest()->ifFalse());
  MBasicBlock* newExit = FollowTrivialGotos(entry);
  MOZ_RELEASE_ASSERT(newInner->isLoopHeader());
  MOZ_RELEASE_ASSERT(newOuter->isLoopHeader());
  MOZ_RELEASE_ASSERT(newExit->lastIns()->isReturn());

  // One more time.
  ClearDominatorTree(func.graph);
  if (!func.runGVN()) {
    return false;
  }

  // The loops are no longer reachable from the normal entry. They are
  // doinated by the osrEntry.
  MOZ_RELEASE_ASSERT(func.graph.osrBlock() == osrEntry);
  newInner = FollowTrivialGotos(osrEntry->lastIns()->toGoto()->target());
  newOuter = FollowTrivialGotos(newInner->lastIns()->toTest()->ifFalse());
  newExit = FollowTrivialGotos(entry);
  MOZ_RELEASE_ASSERT(newInner->isLoopHeader());
  MOZ_RELEASE_ASSERT(newOuter->isLoopHeader());
  MOZ_RELEASE_ASSERT(newExit->lastIns()->isReturn());

  return true;
}
END_TEST(testJitGVN_FixupOSROnlyLoop)

BEGIN_TEST(testJitGVN_FixupOSROnlyLoopNested) {
  // Same as testJitGVN_FixupOSROnlyLoop but adds another level of loop
  // nesting for added excitement.

  MinimalFunc func;

  MBasicBlock* entry = func.createEntryBlock();
  MBasicBlock* osrEntry = func.createOsrEntryBlock();
  MBasicBlock* outerHeader = func.createBlock(entry);
  MBasicBlock* middleHeader = func.createBlock(outerHeader);
  MBasicBlock* merge = func.createBlock(middleHeader);
  MBasicBlock* innerHeader = func.createBlock(merge);
  MBasicBlock* innerBackedge = func.createBlock(innerHeader);
  MBasicBlock* middleBackedge = func.createBlock(innerHeader);
  MBasicBlock* outerBackedge = func.createBlock(middleHeader);
  MBasicBlock* exit = func.createBlock(outerHeader);

  MConstant* c = MConstant::New(func.alloc, BooleanValue(false));
  entry->add(c);
  entry->end(MTest::New(func.alloc, c, outerHeader, exit));
  osrEntry->end(MGoto::New(func.alloc, merge));

  merge->end(MGoto::New(func.alloc, innerHeader));

  // Use Beta nodes to hide the constants and suppress folding.
  MConstant* x = MConstant::New(func.alloc, BooleanValue(false));
  outerHeader->add(x);
  MBeta* xBeta =
      MBeta::New(func.alloc, x, Range::NewInt32Range(func.alloc, 0, 1));
  outerHeader->add(xBeta);
  outerHeader->end(MTest::New(func.alloc, xBeta, middleHeader, exit));

  MConstant* y = MConstant::New(func.alloc, BooleanValue(false));
  middleHeader->add(y);
  MBeta* yBeta =
      MBeta::New(func.alloc, y, Range::NewInt32Range(func.alloc, 0, 1));
  middleHeader->add(yBeta);
  middleHeader->end(MTest::New(func.alloc, yBeta, merge, outerBackedge));

  MConstant* w = MConstant::New(func.alloc, BooleanValue(false));
  innerHeader->add(w);
  MBeta* wBeta =
      MBeta::New(func.alloc, w, Range::NewInt32Range(func.alloc, 0, 1));
  innerHeader->add(wBeta);
  innerHeader->end(
      MTest::New(func.alloc, wBeta, innerBackedge, middleBackedge));

  innerBackedge->end(MGoto::New(func.alloc, innerHeader));
  middleBackedge->end(MGoto::New(func.alloc, middleHeader));
  outerBackedge->end(MGoto::New(func.alloc, outerHeader));

  MConstant* u = MConstant::New(func.alloc, UndefinedValue());
  exit->add(u);
  exit->end(MReturn::New(func.alloc, u));

  MOZ_ALWAYS_TRUE(innerHeader->addPredecessorWithoutPhis(innerBackedge));
  MOZ_ALWAYS_TRUE(middleHeader->addPredecessorWithoutPhis(middleBackedge));
  MOZ_ALWAYS_TRUE(outerHeader->addPredecessorWithoutPhis(outerBackedge));
  MOZ_ALWAYS_TRUE(exit->addPredecessorWithoutPhis(entry));
  MOZ_ALWAYS_TRUE(merge->addPredecessorWithoutPhis(osrEntry));

  outerHeader->setLoopHeader(outerBackedge);
  middleHeader->setLoopHeader(middleBackedge);
  innerHeader->setLoopHeader(innerBackedge);

  if (!func.runGVN()) {
    return false;
  }

  // The loops are no longer reachable from the normal entry. They are
  // doinated by the osrEntry.
  MOZ_RELEASE_ASSERT(func.graph.osrBlock() == osrEntry);
  MBasicBlock* newInner =
      FollowTrivialGotos(osrEntry->lastIns()->toGoto()->target());
  MBasicBlock* newMiddle =
      FollowTrivialGotos(newInner->lastIns()->toTest()->ifFalse());
  MBasicBlock* newOuter =
      FollowTrivialGotos(newMiddle->lastIns()->toTest()->ifFalse());
  MBasicBlock* newExit = FollowTrivialGotos(entry);
  MOZ_RELEASE_ASSERT(newInner->isLoopHeader());
  MOZ_RELEASE_ASSERT(newMiddle->isLoopHeader());
  MOZ_RELEASE_ASSERT(newOuter->isLoopHeader());
  MOZ_RELEASE_ASSERT(newExit->lastIns()->isReturn());

  // One more time.
  ClearDominatorTree(func.graph);
  if (!func.runGVN()) {
    return false;
  }

  // The loops are no longer reachable from the normal entry. They are
  // doinated by the osrEntry.
  MOZ_RELEASE_ASSERT(func.graph.osrBlock() == osrEntry);
  newInner = FollowTrivialGotos(osrEntry->lastIns()->toGoto()->target());
  newMiddle = FollowTrivialGotos(newInner->lastIns()->toTest()->ifFalse());
  newOuter = FollowTrivialGotos(newMiddle->lastIns()->toTest()->ifFalse());
  newExit = FollowTrivialGotos(entry);
  MOZ_RELEASE_ASSERT(newInner->isLoopHeader());
  MOZ_RELEASE_ASSERT(newMiddle->isLoopHeader());
  MOZ_RELEASE_ASSERT(newOuter->isLoopHeader());
  MOZ_RELEASE_ASSERT(newExit->lastIns()->isReturn());

  return true;
}
END_TEST(testJitGVN_FixupOSROnlyLoopNested)

BEGIN_TEST(testJitGVN_PinnedPhis) {
  // Set up a loop which gets optimized away, with phis which must be
  // cleaned up, permitting more phis to be cleaned up.

  MinimalFunc func;

  MBasicBlock* entry = func.createEntryBlock();
  MBasicBlock* outerHeader = func.createBlock(entry);
  MBasicBlock* outerBlock = func.createBlock(outerHeader);
  MBasicBlock* innerHeader = func.createBlock(outerBlock);
  MBasicBlock* innerBackedge = func.createBlock(innerHeader);
  MBasicBlock* exit = func.createBlock(innerHeader);

  MPhi* phi0 = MPhi::New(func.alloc);
  MPhi* phi1 = MPhi::New(func.alloc);
  MPhi* phi2 = MPhi::New(func.alloc);
  MPhi* phi3 = MPhi::New(func.alloc);

  MParameter* p = func.createParameter();
  entry->add(p);
  MConstant* z0 = MConstant::New(func.alloc, Int32Value(0));
  MConstant* z1 = MConstant::New(func.alloc, Int32Value(1));
  MConstant* z2 = MConstant::New(func.alloc, Int32Value(2));
  MConstant* z3 = MConstant::New(func.alloc, Int32Value(2));
  MOZ_RELEASE_ASSERT(phi0->addInputSlow(z0));
  MOZ_RELEASE_ASSERT(phi1->addInputSlow(z1));
  MOZ_RELEASE_ASSERT(phi2->addInputSlow(z2));
  MOZ_RELEASE_ASSERT(phi3->addInputSlow(z3));
  entry->add(z0);
  entry->add(z1);
  entry->add(z2);
  entry->add(z3);
  entry->end(MGoto::New(func.alloc, outerHeader));

  outerHeader->addPhi(phi0);
  outerHeader->addPhi(phi1);
  outerHeader->addPhi(phi2);
  outerHeader->addPhi(phi3);
  outerHeader->end(MGoto::New(func.alloc, outerBlock));

  outerBlock->end(MGoto::New(func.alloc, innerHeader));

  MConstant* true_ = MConstant::New(func.alloc, BooleanValue(true));
  innerHeader->add(true_);
  innerHeader->end(MTest::New(func.alloc, true_, innerBackedge, exit));

  innerBackedge->end(MGoto::New(func.alloc, innerHeader));

  MInstruction* z4 = MAdd::New(func.alloc, phi0, phi1, MIRType::Int32);
  MConstant* z5 = MConstant::New(func.alloc, Int32Value(4));
  MInstruction* z6 = MAdd::New(func.alloc, phi2, phi3, MIRType::Int32);
  MConstant* z7 = MConstant::New(func.alloc, Int32Value(6));
  MOZ_RELEASE_ASSERT(phi0->addInputSlow(z4));
  MOZ_RELEASE_ASSERT(phi1->addInputSlow(z5));
  MOZ_RELEASE_ASSERT(phi2->addInputSlow(z6));
  MOZ_RELEASE_ASSERT(phi3->addInputSlow(z7));
  exit->add(z4);
  exit->add(z5);
  exit->add(z6);
  exit->add(z7);
  exit->end(MGoto::New(func.alloc, outerHeader));

  MOZ_ALWAYS_TRUE(innerHeader->addPredecessorWithoutPhis(innerBackedge));
  MOZ_ALWAYS_TRUE(outerHeader->addPredecessorWithoutPhis(exit));

  outerHeader->setLoopHeader(exit);
  innerHeader->setLoopHeader(innerBackedge);

  if (!func.runGVN()) {
    return false;
  }

  MOZ_RELEASE_ASSERT(innerHeader->phisEmpty());
  MOZ_RELEASE_ASSERT(exit->isDead());

  return true;
}
END_TEST(testJitGVN_PinnedPhis)

quality98%

¤ Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.0.15Bemerkung: (vorverarbeitet) ¤

*Bot Zugriff

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.