test/458-checker-instruction-simplification/src/Main.java

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {

  public static void assertBooleanEquals(boolean expected, boolean result) {
    if (expected != result) {
      throw new Error("Expected: " + expected + ", found: " + result);
    }
  }

  public static void assertIntEquals(int expected, int result) {
    if (expected != result) {
      throw new Error("Expected: " + expected + ", found: " + result);
    }
  }

  public static void assertLongEquals(long expected, long result) {
    if (expected != result) {
      throw new Error("Expected: " + expected + ", found: " + result);
    }
  }

  public static void assertFloatEquals(float expected, float result) {
    if (expected != result) {
      throw new Error("Expected: " + expected + ", found: " + result);
    }
  }

  public static void assertDoubleEquals(double expected, double result) {
    if (expected != result) {
      throw new Error("Expected: " + expected + ", found: " + result);
    }
  }

  /**
   * Tiny programs exercising optimizations of arithmetic identities.
   */

  /// CHECK-START: long Main.Add0(long) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Const0:j\d+>>  LongConstant 0
  /// CHECK-DAG:     <<Add:j\d+>>     Add [<<Const0>>,<<Arg>>]
  /// CHECK-DAG:                      Return [<<Add>>]

  /// CHECK-START: long Main.Add0(long) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:j\d+>>     ParameterValue
  /// CHECK-DAG:                      Return [<<Arg>>]

  /// CHECK-START: long Main.Add0(long) instruction_simplifier (after)
  /// CHECK-NOT:                        Add

  public static long Add0(long arg) {
    return 0 + arg;
  }

  /// CHECK-START: int Main.AndAllOnes(int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<ConstF:i\d+>>  IntConstant -1
  /// CHECK-DAG:     <<And:i\d+>>     And [<<Arg>>,<<ConstF>>]
  /// CHECK-DAG:                      Return [<<And>>]

  /// CHECK-START: int Main.AndAllOnes(int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:i\d+>>     ParameterValue
  /// CHECK-DAG:                      Return [<<Arg>>]

  /// CHECK-START: int Main.AndAllOnes(int) instruction_simplifier (after)
  /// CHECK-NOT:                      And

  public static int AndAllOnes(int arg) {
    return arg & -1;
  }

  /// CHECK-START: long Main.Div1(long) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Const1:j\d+>>  LongConstant 1
  /// CHECK-DAG:     <<Div:j\d+>>     Div [<<Arg>>,<<Const1>>]
  /// CHECK-DAG:                      Return [<<Div>>]

  /// CHECK-START: long Main.Div1(long) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:j\d+>>     ParameterValue
  /// CHECK-DAG:                      Return [<<Arg>>]

  /// CHECK-START: long Main.Div1(long) instruction_simplifier (after)
  /// CHECK-NOT:                      Div

  public static long Div1(long arg) {
    return arg / 1;
  }

  /// CHECK-START: int Main.DivN1(int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<ConstN1:i\d+>>  IntConstant -1
  /// CHECK-DAG:     <<Div:i\d+>>      Div [<<Arg>>,<<ConstN1>>]
  /// CHECK-DAG:                       Return [<<Div>>]

  /// CHECK-START: int Main.DivN1(int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<Neg:i\d+>>      Neg [<<Arg>>]
  /// CHECK-DAG:                       Return [<<Neg>>]

  /// CHECK-START: int Main.DivN1(int) instruction_simplifier (after)
  /// CHECK-NOT:                       Div

  public static int DivN1(int arg) {
    return arg / -1;
  }

  /// CHECK-START: long Main.Mul1(long) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Const1:j\d+>>  LongConstant 1
  /// CHECK-DAG:     <<Mul:j\d+>>     Mul [<<Arg>>,<<Const1>>]
  /// CHECK-DAG:                      Return [<<Mul>>]

  /// CHECK-START: long Main.Mul1(long) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:j\d+>>     ParameterValue
  /// CHECK-DAG:                      Return [<<Arg>>]

  /// CHECK-START: long Main.Mul1(long) instruction_simplifier (after)
  /// CHECK-NOT:                       Mul

  public static long Mul1(long arg) {
    return arg * 1;
  }

  /// CHECK-START: int Main.MulN1(int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<ConstN1:i\d+>>  IntConstant -1
  /// CHECK-DAG:     <<Mul:i\d+>>      Mul [<<Arg>>,<<ConstN1>>]
  /// CHECK-DAG:                       Return [<<Mul>>]

  /// CHECK-START: int Main.MulN1(int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<Neg:i\d+>>      Neg [<<Arg>>]
  /// CHECK-DAG:                       Return [<<Neg>>]

  /// CHECK-START: int Main.MulN1(int) instruction_simplifier (after)
  /// CHECK-NOT:                       Mul

  public static int MulN1(int arg) {
    return arg * -1;
  }

  /// CHECK-START: long Main.MulPowerOfTwo128(long) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:j\d+>>       ParameterValue
  /// CHECK-DAG:     <<Const128:j\d+>>  LongConstant 128
  /// CHECK-DAG:     <<Mul:j\d+>>       Mul [<<Arg>>,<<Const128>>]
  /// CHECK-DAG:                        Return [<<Mul>>]

  /// CHECK-START: long Main.MulPowerOfTwo128(long) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:j\d+>>       ParameterValue
  /// CHECK-DAG:     <<Const7:i\d+>>    IntConstant 7
  /// CHECK-DAG:     <<Shl:j\d+>>       Shl [<<Arg>>,<<Const7>>]
  /// CHECK-DAG:                        Return [<<Shl>>]

  /// CHECK-START: long Main.MulPowerOfTwo128(long) instruction_simplifier (after)
  /// CHECK-NOT:                        Mul

  public static long MulPowerOfTwo128(long arg) {
    return arg * 128;
  }

  /// CHECK-START: int Main.Or0(int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const0:i\d+>>   IntConstant 0
  /// CHECK-DAG:     <<Or:i\d+>>       Or [<<Arg>>,<<Const0>>]
  /// CHECK-DAG:                       Return [<<Or>>]

  /// CHECK-START: int Main.Or0(int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:                       Return [<<Arg>>]

  /// CHECK-START: int Main.Or0(int) instruction_simplifier (after)
  /// CHECK-NOT:                       Or

  public static int Or0(int arg) {
    return arg | 0;
  }

  /// CHECK-START: long Main.OrSame(long) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:j\d+>>       ParameterValue
  /// CHECK-DAG:     <<Or:j\d+>>        Or [<<Arg>>,<<Arg>>]
  /// CHECK-DAG:                        Return [<<Or>>]

  /// CHECK-START: long Main.OrSame(long) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:j\d+>>       ParameterValue
  /// CHECK-DAG:                        Return [<<Arg>>]

  /// CHECK-START: long Main.OrSame(long) instruction_simplifier (after)
  /// CHECK-NOT:                        Or

  public static long OrSame(long arg) {
    return arg | arg;
  }

  /// CHECK-START: int Main.Shl0(int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const0:i\d+>>   IntConstant 0
  /// CHECK-DAG:     <<Shl:i\d+>>      Shl [<<Arg>>,<<Const0>>]
  /// CHECK-DAG:                       Return [<<Shl>>]

  /// CHECK-START: int Main.Shl0(int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:                       Return [<<Arg>>]

  /// CHECK-START: int Main.Shl0(int) instruction_simplifier (after)
  /// CHECK-NOT:                       Shl

  public static int Shl0(int arg) {
    return arg << 0;
  }

  /// CHECK-START: int Main.Shl1(int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const1:i\d+>>   IntConstant 1
  /// CHECK-DAG:     <<Shl:i\d+>>      Shl [<<Arg>>,<<Const1>>]
  /// CHECK-DAG:                       Return [<<Shl>>]

  /// CHECK-START: int Main.Shl1(int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<Add:i\d+>>      Add [<<Arg>>,<<Arg>>]
  /// CHECK-DAG:                       Return [<<Add>>]

  /// CHECK-START: int Main.Shl1(int) instruction_simplifier (after)
  /// CHECK-NOT:                       Shl

  public static int Shl1(int arg) {
    return arg << 1;
  }

  /// CHECK-START: long Main.Shr0(long) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:j\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const0:i\d+>>   IntConstant 0
  /// CHECK-DAG:     <<Shr:j\d+>>      Shr [<<Arg>>,<<Const0>>]
  /// CHECK-DAG:                       Return [<<Shr>>]

  /// CHECK-START: long Main.Shr0(long) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:j\d+>>      ParameterValue
  /// CHECK-DAG:                       Return [<<Arg>>]

  /// CHECK-START: long Main.Shr0(long) instruction_simplifier (after)
  /// CHECK-NOT:                       Shr

  public static long Shr0(long arg) {
    return arg >> 0;
  }

  /// CHECK-START: long Main.Sub0(long) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:j\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const0:j\d+>>   LongConstant 0
  /// CHECK-DAG:     <<Sub:j\d+>>      Sub [<<Arg>>,<<Const0>>]
  /// CHECK-DAG:                       Return [<<Sub>>]

  /// CHECK-START: long Main.Sub0(long) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:j\d+>>      ParameterValue
  /// CHECK-DAG:                       Return [<<Arg>>]

  /// CHECK-START: long Main.Sub0(long) instruction_simplifier (after)
  /// CHECK-NOT:                       Sub

  public static long Sub0(long arg) {
    return arg - 0;
  }

  /// CHECK-START: int Main.SubAliasNeg(int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const0:i\d+>>   IntConstant 0
  /// CHECK-DAG:     <<Sub:i\d+>>      Sub [<<Const0>>,<<Arg>>]
  /// CHECK-DAG:                       Return [<<Sub>>]

  /// CHECK-START: int Main.SubAliasNeg(int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<Neg:i\d+>>      Neg [<<Arg>>]
  /// CHECK-DAG:                       Return [<<Neg>>]

  /// CHECK-START: int Main.SubAliasNeg(int) instruction_simplifier (after)
  /// CHECK-NOT:                       Sub

  public static int SubAliasNeg(int arg) {
    return 0 - arg;
  }

  /// CHECK-START: long Main.UShr0(long) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:j\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const0:i\d+>>   IntConstant 0
  /// CHECK-DAG:     <<UShr:j\d+>>     UShr [<<Arg>>,<<Const0>>]
  /// CHECK-DAG:                       Return [<<UShr>>]

  /// CHECK-START: long Main.UShr0(long) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:j\d+>>      ParameterValue
  /// CHECK-DAG:                       Return [<<Arg>>]

  /// CHECK-START: long Main.UShr0(long) instruction_simplifier (after)
  /// CHECK-NOT:                       UShr

  public static long UShr0(long arg) {
    return arg >>> 0;
  }

  /// CHECK-START: int Main.Xor0(int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const0:i\d+>>   IntConstant 0
  /// CHECK-DAG:     <<Xor:i\d+>>      Xor [<<Arg>>,<<Const0>>]
  /// CHECK-DAG:                       Return [<<Xor>>]

  /// CHECK-START: int Main.Xor0(int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:                       Return [<<Arg>>]

  /// CHECK-START: int Main.Xor0(int) instruction_simplifier (after)
  /// CHECK-NOT:                       Xor

  public static int Xor0(int arg) {
    return arg ^ 0;
  }

  /// CHECK-START: int Main.XorAllOnes(int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<ConstF:i\d+>>   IntConstant -1
  /// CHECK-DAG:     <<Xor:i\d+>>      Xor [<<Arg>>,<<ConstF>>]
  /// CHECK-DAG:                       Return [<<Xor>>]

  /// CHECK-START: int Main.XorAllOnes(int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<Not:i\d+>>      Not [<<Arg>>]
  /// CHECK-DAG:                       Return [<<Not>>]

  /// CHECK-START: int Main.XorAllOnes(int) instruction_simplifier (after)
  /// CHECK-NOT:                       Xor

  public static int XorAllOnes(int arg) {
    return arg ^ -1;
  }

  /**
   * Test that addition or subtraction operation with both inputs negated are
   * optimized to use a single negation after the operation.
   * The transformation tested is implemented in
   * `InstructionSimplifierVisitor::TryMoveNegOnInputsAfterBinop`.
   */

  /// CHECK-START: int Main.AddNegs1(int, int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg1:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Neg1:i\d+>>     Neg [<<Arg1>>]
  /// CHECK-DAG:     <<Neg2:i\d+>>     Neg [<<Arg2>>]
  /// CHECK-DAG:     <<Add:i\d+>>      Add [<<Neg1>>,<<Neg2>>]
  /// CHECK-DAG:                       Return [<<Add>>]

  /// CHECK-START: int Main.AddNegs1(int, int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg1:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:i\d+>>     ParameterValue
  /// CHECK-NOT:                       Neg
  /// CHECK-DAG:     <<Add:i\d+>>      Add [<<Arg1>>,<<Arg2>>]
  /// CHECK-DAG:     <<Neg:i\d+>>      Neg [<<Add>>]
  /// CHECK-DAG:                       Return [<<Neg>>]

  public static int AddNegs1(int arg1, int arg2) {
    return -arg1 + -arg2;
  }

  /**
   * This is similar to the test-case AddNegs1, but the negations have
   * multiple uses.
   * The transformation tested is implemented in
   * `InstructionSimplifierVisitor::TryMoveNegOnInputsAfterBinop`.
   * The current code won't perform the previous optimization. The
   * transformations do not look at other uses of their inputs. As they don't
   * know what will happen with other uses, they do not take the risk of
   * increasing the register pressure by creating or extending live ranges.
   */

  /// CHECK-START: int Main.AddNegs2(int, int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg1:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Neg1:i\d+>>     Neg [<<Arg1>>]
  /// CHECK-DAG:     <<Neg2:i\d+>>     Neg [<<Arg2>>]
  /// CHECK-DAG:     <<Add1:i\d+>>     Add [<<Neg1>>,<<Neg2>>]
  /// CHECK-DAG:     <<Add2:i\d+>>     Add [<<Neg1>>,<<Neg2>>]
  /// CHECK-DAG:     <<Or:i\d+>>       Or [<<Add1>>,<<Add2>>]
  /// CHECK-DAG:                       Return [<<Or>>]

  /// CHECK-START: int Main.AddNegs2(int, int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg1:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Neg1:i\d+>>     Neg [<<Arg1>>]
  /// CHECK-DAG:     <<Neg2:i\d+>>     Neg [<<Arg2>>]
  /// CHECK-DAG:     <<Add1:i\d+>>     Add [<<Neg1>>,<<Neg2>>]
  /// CHECK-DAG:     <<Add2:i\d+>>     Add [<<Neg1>>,<<Neg2>>]
  /// CHECK-NOT:                       Neg
  /// CHECK-DAG:     <<Or:i\d+>>       Or [<<Add1>>,<<Add2>>]
  /// CHECK-DAG:                       Return [<<Or>>]

  /// CHECK-START: int Main.AddNegs2(int, int) GVN (after)
  /// CHECK-DAG:     <<Arg1:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Neg1:i\d+>>     Neg [<<Arg1>>]
  /// CHECK-DAG:     <<Neg2:i\d+>>     Neg [<<Arg2>>]
  /// CHECK-DAG:     <<Add:i\d+>>      Add [<<Neg1>>,<<Neg2>>]
  /// CHECK-DAG:     <<Or:i\d+>>       Or [<<Add>>,<<Add>>]
  /// CHECK-DAG:                       Return [<<Or>>]

  public static int AddNegs2(int arg1, int arg2) {
    int temp1 = -arg1;
    int temp2 = -arg2;
    return (temp1 + temp2) | (temp1 + temp2);
  }

  /**
   * This follows test-cases AddNegs1 and AddNegs2.
   * The transformation tested is implemented in
   * `InstructionSimplifierVisitor::TryMoveNegOnInputsAfterBinop`.
   * The optimization should not happen if it moves an additional instruction in
   * the loop.
   */

  /// CHECK-START: long Main.AddNegs3(long, long) instruction_simplifier (before)
  //  -------------- Arguments and initial negation operations.
  /// CHECK-DAG:     <<Arg1:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Neg1:j\d+>>     Neg [<<Arg1>>]
  /// CHECK-DAG:     <<Neg2:j\d+>>     Neg [<<Arg2>>]
  /// CHECK:                           Goto
  //  -------------- Loop
  /// CHECK:                           SuspendCheck
  /// CHECK:         <<Add:j\d+>>      Add [<<Neg1>>,<<Neg2>>]
  /// CHECK:                           Goto

  /// CHECK-START: long Main.AddNegs3(long, long) instruction_simplifier (after)
  //  -------------- Arguments and initial negation operations.
  /// CHECK-DAG:     <<Arg1:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Neg1:j\d+>>     Neg [<<Arg1>>]
  /// CHECK-DAG:     <<Neg2:j\d+>>     Neg [<<Arg2>>]
  /// CHECK:                           Goto
  //  -------------- Loop
  /// CHECK:                           SuspendCheck
  /// CHECK:         <<Add:j\d+>>      Add [<<Neg1>>,<<Neg2>>]
  /// CHECK-NOT:                       Neg
  /// CHECK:                           Goto

  public static long AddNegs3(long arg1, long arg2) {
    long res = 0;
    long n_arg1 = -arg1;
    long n_arg2 = -arg2;
    for (long i = 0; i < 1; i++) {
      res += n_arg1 + n_arg2 + i;
    }
    return res;
  }

  /**
   * Test the simplification of an addition with a negated argument into a
   * subtraction.
   * The transformation tested is implemented in `InstructionSimplifierVisitor::VisitAdd`.
   */

  /// CHECK-START: long Main.AddNeg1(long, long) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg1:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Neg:j\d+>>      Neg [<<Arg1>>]
  /// CHECK-DAG:     <<Add:j\d+>>      Add [<<Neg>>,<<Arg2>>]
  /// CHECK-DAG:                       Return [<<Add>>]

  /// CHECK-START: long Main.AddNeg1(long, long) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg1:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Sub:j\d+>>      Sub [<<Arg2>>,<<Arg1>>]
  /// CHECK-DAG:                       Return [<<Sub>>]

  /// CHECK-START: long Main.AddNeg1(long, long) instruction_simplifier (after)
  /// CHECK-NOT:                       Neg
  /// CHECK-NOT:                       Add

  public static long AddNeg1(long arg1, long arg2) {
    return -arg1 + arg2;
  }

  /**
   * This is similar to the test-case AddNeg1, but the negation has two uses.
   * The transformation tested is implemented in `InstructionSimplifierVisitor::VisitAdd`.
   * The current code won't perform the previous optimization. The
   * transformations do not look at other uses of their inputs. As they don't
   * know what will happen with other uses, they do not take the risk of
   * increasing the register pressure by creating or extending live ranges.
   */

  /// CHECK-START: long Main.AddNeg2(long, long) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg1:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Neg:j\d+>>      Neg [<<Arg2>>]
  /// CHECK-DAG:     <<Add1:j\d+>>     Add [<<Arg1>>,<<Neg>>]
  /// CHECK-DAG:     <<Add2:j\d+>>     Add [<<Arg1>>,<<Neg>>]
  /// CHECK-DAG:     <<Res:j\d+>>      Or [<<Add1>>,<<Add2>>]
  /// CHECK-DAG:                       Return [<<Res>>]

  /// CHECK-START: long Main.AddNeg2(long, long) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg1:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Neg:j\d+>>      Neg [<<Arg2>>]
  /// CHECK-DAG:     <<Add1:j\d+>>     Add [<<Arg1>>,<<Neg>>]
  /// CHECK-DAG:     <<Add2:j\d+>>     Add [<<Arg1>>,<<Neg>>]
  /// CHECK-DAG:     <<Res:j\d+>>      Or [<<Add1>>,<<Add2>>]
  /// CHECK-DAG:                       Return [<<Res>>]

  /// CHECK-START: long Main.AddNeg2(long, long) instruction_simplifier (after)
  /// CHECK-NOT:                       Sub

  public static long AddNeg2(long arg1, long arg2) {
    long temp = -arg2;
    return (arg1 + temp) | (arg1 + temp);
  }

  /**
   * Test simplification of the `-(-var)` pattern.
   * The transformation tested is implemented in `InstructionSimplifierVisitor::VisitNeg`.
   */

  /// CHECK-START: long Main.NegNeg1(long) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:j\d+>>      ParameterValue
  /// CHECK-DAG:     <<Neg1:j\d+>>     Neg [<<Arg>>]
  /// CHECK-DAG:     <<Neg2:j\d+>>     Neg [<<Neg1>>]
  /// CHECK-DAG:                       Return [<<Neg2>>]

  /// CHECK-START: long Main.NegNeg1(long) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:j\d+>>      ParameterValue
  /// CHECK-DAG:                       Return [<<Arg>>]

  /// CHECK-START: long Main.NegNeg1(long) instruction_simplifier (after)
  /// CHECK-NOT:                       Neg

  public static long NegNeg1(long arg) {
    return -(-arg);
  }

  /**
   * Test 'multi-step' simplification, where a first transformation yields a
   * new simplification possibility for the current instruction.
   * The transformations tested are implemented in `InstructionSimplifierVisitor::VisitNeg`
   * and in `InstructionSimplifierVisitor::VisitAdd`.
   */

  /// CHECK-START: int Main.NegNeg2(int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<Neg1:i\d+>>     Neg [<<Arg>>]
  /// CHECK-DAG:     <<Neg2:i\d+>>     Neg [<<Neg1>>]
  /// CHECK-DAG:     <<Add:i\d+>>      Add [<<Neg1>>,<<Neg2>>]
  /// CHECK-DAG:                       Return [<<Add>>]

  /// CHECK-START: int Main.NegNeg2(int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<Sub:i\d+>>      Sub [<<Arg>>,<<Arg>>]
  /// CHECK-DAG:                       Return [<<Sub>>]

  /// CHECK-START: int Main.NegNeg2(int) instruction_simplifier (after)
  /// CHECK-NOT:                       Neg
  /// CHECK-NOT:                       Add

  /// CHECK-START: int Main.NegNeg2(int) constant_folding_after_inlining (after)
  /// CHECK:         <<Const0:i\d+>>   IntConstant 0
  /// CHECK-NOT:                       Neg
  /// CHECK-NOT:                       Add
  /// CHECK:                           Return [<<Const0>>]

  public static int NegNeg2(int arg) {
    int temp = -arg;
    return temp + -temp;
  }

  /**
   * Test another 'multi-step' simplification, where a first transformation
   * yields a new simplification possibility for the current instruction.
   * The transformations tested are implemented in `InstructionSimplifierVisitor::VisitNeg`
   * and in `InstructionSimplifierVisitor::VisitSub`.
   */

  /// CHECK-START: long Main.NegNeg3(long) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:j\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const0:j\d+>>   LongConstant 0
  /// CHECK-DAG:     <<Neg:j\d+>>      Neg [<<Arg>>]
  /// CHECK-DAG:     <<Sub:j\d+>>      Sub [<<Const0>>,<<Neg>>]
  /// CHECK-DAG:                       Return [<<Sub>>]

  /// CHECK-START: long Main.NegNeg3(long) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:j\d+>>      ParameterValue
  /// CHECK-DAG:                       Return [<<Arg>>]

  /// CHECK-START: long Main.NegNeg3(long) instruction_simplifier (after)
  /// CHECK-NOT:                       Neg
  /// CHECK-NOT:                       Sub

  public static long NegNeg3(long arg) {
    return 0 - -arg;
  }

  /**
   * Test that a negated subtraction is simplified to a subtraction with its
   * arguments reversed.
   * The transformation tested is implemented in `InstructionSimplifierVisitor::VisitNeg`.
   */

  /// CHECK-START: int Main.NegSub1(int, int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg1:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Sub:i\d+>>      Sub [<<Arg1>>,<<Arg2>>]
  /// CHECK-DAG:     <<Neg:i\d+>>      Neg [<<Sub>>]
  /// CHECK-DAG:                       Return [<<Neg>>]

  /// CHECK-START: int Main.NegSub1(int, int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg1:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Sub:i\d+>>      Sub [<<Arg2>>,<<Arg1>>]
  /// CHECK-DAG:                       Return [<<Sub>>]

  /// CHECK-START: int Main.NegSub1(int, int) instruction_simplifier (after)
  /// CHECK-NOT:                       Neg

  public static int NegSub1(int arg1, int arg2) {
    return -(arg1 - arg2);
  }

  /**
   * This is similar to the test-case NegSub1, but the subtraction has
   * multiple uses.
   * The transformation tested is implemented in `InstructionSimplifierVisitor::VisitNeg`.
   * The current code won't perform the previous optimization. The
   * transformations do not look at other uses of their inputs. As they don't
   * know what will happen with other uses, they do not take the risk of
   * increasing the register pressure by creating or extending live ranges.
   */

  /// CHECK-START: int Main.NegSub2(int, int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg1:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Sub:i\d+>>      Sub [<<Arg1>>,<<Arg2>>]
  /// CHECK-DAG:     <<Neg1:i\d+>>     Neg [<<Sub>>]
  /// CHECK-DAG:     <<Neg2:i\d+>>     Neg [<<Sub>>]
  /// CHECK-DAG:     <<Or:i\d+>>       Or [<<Neg1>>,<<Neg2>>]
  /// CHECK-DAG:                       Return [<<Or>>]

  /// CHECK-START: int Main.NegSub2(int, int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg1:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Sub:i\d+>>      Sub [<<Arg1>>,<<Arg2>>]
  /// CHECK-DAG:     <<Neg1:i\d+>>     Neg [<<Sub>>]
  /// CHECK-DAG:     <<Neg2:i\d+>>     Neg [<<Sub>>]
  /// CHECK-DAG:     <<Or:i\d+>>       Or [<<Neg1>>,<<Neg2>>]
  /// CHECK-DAG:                       Return [<<Or>>]

  public static int NegSub2(int arg1, int arg2) {
    int temp = arg1 - arg2;
    return -temp | -temp;
  }

  /**
   * Test simplification of the `~~var` pattern.
   * The transformation tested is implemented in `InstructionSimplifierVisitor::VisitNot`.
   */

  /// CHECK-START: long Main.NotNot1(long) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:j\d+>>      ParameterValue
  /// CHECK-DAG:     <<ConstF1:j\d+>>  LongConstant -1
  /// CHECK-DAG:     <<Xor1:j\d+>>     Xor [<<Arg>>,<<ConstF1>>]
  /// CHECK-DAG:     <<Xor2:j\d+>>     Xor [<<Xor1>>,<<ConstF1>>]
  /// CHECK-DAG:                       Return [<<Xor2>>]

  /// CHECK-START: long Main.NotNot1(long) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:j\d+>>      ParameterValue
  /// CHECK-DAG:                       Return [<<Arg>>]

  /// CHECK-START: long Main.NotNot1(long) instruction_simplifier (after)
  /// CHECK-NOT:                       Xor

  public static long NotNot1(long arg) {
    return ~~arg;
  }

  /// CHECK-START: int Main.NotNot2(int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<ConstF1:i\d+>>  IntConstant -1
  /// CHECK-DAG:     <<Xor1:i\d+>>     Xor [<<Arg>>,<<ConstF1>>]
  /// CHECK-DAG:     <<Xor2:i\d+>>     Xor [<<Xor1>>,<<ConstF1>>]
  /// CHECK-DAG:     <<Add:i\d+>>      Add [<<Xor1>>,<<Xor2>>]
  /// CHECK-DAG:                       Return [<<Add>>]

  /// CHECK-START: int Main.NotNot2(int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:i\d+>>      ParameterValue
  /// CHECK-DAG:     <<Not:i\d+>>      Not [<<Arg>>]
  /// CHECK-DAG:     <<Add:i\d+>>      Add [<<Not>>,<<Arg>>]
  /// CHECK-DAG:                       Return [<<Add>>]

  /// CHECK-START: int Main.NotNot2(int) instruction_simplifier (after)
  /// CHECK-NOT:                       Xor

  public static int NotNot2(int arg) {
    int temp = ~arg;
    return temp + ~temp;
  }

  /**
   * Test the simplification of a subtraction with a negated argument.
   * The transformation tested is implemented in `InstructionSimplifierVisitor::VisitSub`.
   */

  /// CHECK-START: int Main.SubNeg1(int, int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg1:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Neg:i\d+>>      Neg [<<Arg1>>]
  /// CHECK-DAG:     <<Sub:i\d+>>      Sub [<<Neg>>,<<Arg2>>]
  /// CHECK-DAG:                       Return [<<Sub>>]

  /// CHECK-START: int Main.SubNeg1(int, int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg1:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Add:i\d+>>      Add [<<Arg1>>,<<Arg2>>]
  /// CHECK-DAG:     <<Neg:i\d+>>      Neg [<<Add>>]
  /// CHECK-DAG:                       Return [<<Neg>>]

  /// CHECK-START: int Main.SubNeg1(int, int) instruction_simplifier (after)
  /// CHECK-NOT:                       Sub

  public static int SubNeg1(int arg1, int arg2) {
    return -arg1 - arg2;
  }

  /**
   * This is similar to the test-case SubNeg1, but the negation has
   * multiple uses.
   * The transformation tested is implemented in `InstructionSimplifierVisitor::VisitSub`.
   * The current code won't perform the previous optimization. The
   * transformations do not look at other uses of their inputs. As they don't
   * know what will happen with other uses, they do not take the risk of
   * increasing the register pressure by creating or extending live ranges.
   */

  /// CHECK-START: int Main.SubNeg2(int, int) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg1:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Neg:i\d+>>      Neg [<<Arg1>>]
  /// CHECK-DAG:     <<Sub1:i\d+>>     Sub [<<Neg>>,<<Arg2>>]
  /// CHECK-DAG:     <<Sub2:i\d+>>     Sub [<<Neg>>,<<Arg2>>]
  /// CHECK-DAG:     <<Or:i\d+>>       Or [<<Sub1>>,<<Sub2>>]
  /// CHECK-DAG:                       Return [<<Or>>]

  /// CHECK-START: int Main.SubNeg2(int, int) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg1:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:i\d+>>     ParameterValue
  /// CHECK-DAG:     <<Neg:i\d+>>      Neg [<<Arg1>>]
  /// CHECK-DAG:     <<Sub1:i\d+>>     Sub [<<Neg>>,<<Arg2>>]
  /// CHECK-DAG:     <<Sub2:i\d+>>     Sub [<<Neg>>,<<Arg2>>]
  /// CHECK-DAG:     <<Or:i\d+>>       Or [<<Sub1>>,<<Sub2>>]
  /// CHECK-DAG:                       Return [<<Or>>]

  /// CHECK-START: int Main.SubNeg2(int, int) instruction_simplifier (after)
  /// CHECK-NOT:                       Add

  public static int SubNeg2(int arg1, int arg2) {
    int temp = -arg1;
    return (temp - arg2) | (temp - arg2);
  }

  /**
   * This follows test-cases SubNeg1 and SubNeg2.
   * The transformation tested is implemented in `InstructionSimplifierVisitor::VisitSub`.
   * The optimization should not happen if it moves an additional instruction in
   * the loop.
   */

  /// CHECK-START: long Main.SubNeg3(long, long) instruction_simplifier (before)
  //  -------------- Arguments and initial negation operation.
  /// CHECK-DAG:     <<Arg1:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Neg:j\d+>>      Neg [<<Arg1>>]
  /// CHECK:                           Goto
  //  -------------- Loop
  /// CHECK:                           SuspendCheck
  /// CHECK:         <<Sub:j\d+>>      Sub [<<Neg>>,<<Arg2>>]
  /// CHECK:                           Goto

  /// CHECK-START: long Main.SubNeg3(long, long) instruction_simplifier (after)
  //  -------------- Arguments and initial negation operation.
  /// CHECK-DAG:     <<Arg1:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Arg2:j\d+>>     ParameterValue
  /// CHECK-DAG:     <<Neg:j\d+>>      Neg [<<Arg1>>]
  /// CHECK-DAG:                       Goto
  //  -------------- Loop
  /// CHECK:                           SuspendCheck
  /// CHECK:         <<Sub:j\d+>>      Sub [<<Neg>>,<<Arg2>>]
  /// CHECK-NOT:                       Neg
  /// CHECK:                           Goto

  public static long SubNeg3(long arg1, long arg2) {
    long res = 0;
    long temp = -arg1;
    for (long i = 0; i < 1; i++) {
      res += temp - arg2 - i;
    }
    return res;
  }

  /// CHECK-START: int Main.EqualTrueRhs(boolean) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const1:i\d+>>   IntConstant 1
  /// CHECK-DAG:     <<Cond:z\d+>>     Equal [<<Arg>>,<<Const1>>]
  /// CHECK-DAG:                       If [<<Cond>>]

  /// CHECK-START: int Main.EqualTrueRhs(boolean) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:                       If [<<Arg>>]

  public static int EqualTrueRhs(boolean arg) {
    return (arg != true) ? 3 : 5;
  }

  /// CHECK-START: int Main.EqualTrueLhs(boolean) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const1:i\d+>>   IntConstant 1
  /// CHECK-DAG:     <<Cond:z\d+>>     Equal [<<Const1>>,<<Arg>>]
  /// CHECK-DAG:                       If [<<Cond>>]

  /// CHECK-START: int Main.EqualTrueLhs(boolean) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:                       If [<<Arg>>]

  public static int EqualTrueLhs(boolean arg) {
    return (true != arg) ? 3 : 5;
  }

  /// CHECK-START: int Main.EqualFalseRhs(boolean) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const0:i\d+>>   IntConstant 0
  /// CHECK-DAG:     <<Cond:z\d+>>     Equal [<<Arg>>,<<Const0>>]
  /// CHECK-DAG:                       If [<<Cond>>]

  /// CHECK-START: int Main.EqualFalseRhs(boolean) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:     <<NotArg:z\d+>>   BooleanNot [<<Arg>>]
  /// CHECK-DAG:                       If [<<NotArg>>]

  public static int EqualFalseRhs(boolean arg) {
    return (arg != false) ? 3 : 5;
  }

  /// CHECK-START: int Main.EqualFalseLhs(boolean) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const0:i\d+>>   IntConstant 0
  /// CHECK-DAG:     <<Cond:z\d+>>     Equal [<<Const0>>,<<Arg>>]
  /// CHECK-DAG:                       If [<<Cond>>]

  /// CHECK-START: int Main.EqualFalseLhs(boolean) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:     <<NotArg:z\d+>>   BooleanNot [<<Arg>>]
  /// CHECK-DAG:                       If [<<NotArg>>]

  public static int EqualFalseLhs(boolean arg) {
    return (false != arg) ? 3 : 5;
  }

  /// CHECK-START: int Main.NotEqualTrueRhs(boolean) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const1:i\d+>>   IntConstant 1
  /// CHECK-DAG:     <<Cond:z\d+>>     NotEqual [<<Arg>>,<<Const1>>]
  /// CHECK-DAG:                       If [<<Cond>>]

  /// CHECK-START: int Main.NotEqualTrueRhs(boolean) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:     <<NotArg:z\d+>>   BooleanNot [<<Arg>>]
  /// CHECK-DAG:                       If [<<NotArg>>]

  public static int NotEqualTrueRhs(boolean arg) {
    return (arg == true) ? 3 : 5;
  }

  /// CHECK-START: int Main.NotEqualTrueLhs(boolean) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const1:i\d+>>   IntConstant 1
  /// CHECK-DAG:     <<Cond:z\d+>>     NotEqual [<<Const1>>,<<Arg>>]
  /// CHECK-DAG:                       If [<<Cond>>]

  /// CHECK-START: int Main.NotEqualTrueLhs(boolean) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:     <<NotArg:z\d+>>   BooleanNot [<<Arg>>]
  /// CHECK-DAG:                       If [<<NotArg>>]

  public static int NotEqualTrueLhs(boolean arg) {
    return (true == arg) ? 3 : 5;
  }

  /// CHECK-START: int Main.NotEqualFalseRhs(boolean) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const0:i\d+>>   IntConstant 0
  /// CHECK-DAG:     <<Cond:z\d+>>     NotEqual [<<Arg>>,<<Const0>>]
  /// CHECK-DAG:                       If [<<Cond>>]

  /// CHECK-START: int Main.NotEqualFalseRhs(boolean) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:                       If [<<Arg>>]

  public static int NotEqualFalseRhs(boolean arg) {
    return (arg == false) ? 3 : 5;
  }

  /// CHECK-START: int Main.NotEqualFalseLhs(boolean) instruction_simplifier (before)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const0:i\d+>>   IntConstant 0
  /// CHECK-DAG:     <<Cond:z\d+>>     NotEqual [<<Const0>>,<<Arg>>]
  /// CHECK-DAG:                       If [<<Cond>>]

  /// CHECK-START: int Main.NotEqualFalseLhs(boolean) instruction_simplifier (after)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:                       If [<<Arg>>]

  public static int NotEqualFalseLhs(boolean arg) {
    return (false == arg) ? 3 : 5;
  }

  /// CHECK-START: boolean Main.EqualBoolVsIntConst(boolean) instruction_simplifier_after_bce (before)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const2:i\d+>>   IntConstant 2
  /// CHECK-DAG:     <<BoolNot:z\d+>>  BooleanNot [<<Arg>>]
  /// CHECK-DAG:     <<Cond:z\d+>>     Equal [<<BoolNot>>,<<Const2>>]
  /// CHECK-DAG:                       Return [<<Cond>>]

  /// CHECK-START: boolean Main.EqualBoolVsIntConst(boolean) instruction_simplifier_after_bce (after)
  /// CHECK-DAG:     <<False:i\d+>>    IntConstant 0
  /// CHECK-DAG:                       Return [<<False>>]

  public static boolean EqualBoolVsIntConst(boolean arg) {
    return (arg ? 0 : 1) == 2;
  }

  /// CHECK-START: boolean Main.NotEqualBoolVsIntConst(boolean) instruction_simplifier_after_bce (before)
  /// CHECK-DAG:     <<Arg:z\d+>>      ParameterValue
  /// CHECK-DAG:     <<Const2:i\d+>>   IntConstant 2
  /// CHECK-DAG:     <<BoolNot:z\d+>>  BooleanNot [<<Arg>>]
  /// CHECK-DAG:     <<Cond:z\d+>>     NotEqual [<<BoolNot>>,<<Const2>>]
  /// CHECK-DAG:                       Return [<<Cond>>]

  /// CHECK-START: boolean Main.NotEqualBoolVsIntConst(boolean) instruction_simplifier_after_bce (after)
  /// CHECK-DAG:     <<True:i\d+>>     IntConstant 1
  /// CHECK-DAG:                       Return [<<True>>]

  public static boolean NotEqualBoolVsIntConst(boolean arg) {
    return (arg ? 0 : 1) != 2;
  }

  /*
   * Test simplification of double Boolean negation. Note that sometimes
   * both negations can be removed but we only expect the simplifier to
   * remove the second.
   */

  /// CHECK-START: boolean Main.NotNotBool(boolean) instruction_simplifier_after_bce (before)
  /// CHECK-DAG:     <<Arg:z\d+>>       ParameterValue
  /// CHECK-DAG:     <<NotArg:z\d+>>    BooleanNot [<<Arg>>]
  /// CHECK-DAG:     <<NotNotArg:z\d+>> BooleanNot [<<NotArg>>]
  /// CHECK-DAG:                        Return [<<NotNotArg>>]

  /// CHECK-START: boolean Main.NotNotBool(boolean) instruction_simplifier_after_bce (after)
  /// CHECK-DAG:     <<Arg:z\d+>>       ParameterValue
  /// CHECK-DAG:                        BooleanNot [<<Arg>>]
  /// CHECK-DAG:                        Return [<<Arg>>]

  /// CHECK-START: boolean Main.NotNotBool(boolean) instruction_simplifier_after_bce (after)
  /// CHECK:                            BooleanNot
  /// CHECK-NOT:                        BooleanNot

  public static boolean NegateValue(boolean arg) {
    return !arg;
  }

  public static boolean NotNotBool(boolean arg) {
    return !(NegateValue(arg));
  }

  /// CHECK-START: float Main.Div2(float) instruction_simplifier (before)
  /// CHECK-DAG:      <<Arg:f\d+>>      ParameterValue
  /// CHECK-DAG:      <<Const2:f\d+>>   FloatConstant 2
  /// CHECK-DAG:      <<Div:f\d+>>      Div [<<Arg>>,<<Const2>>]
  /// CHECK-DAG:                        Return [<<Div>>]

  /// CHECK-START: float Main.Div2(float) instruction_simplifier (after)
  /// CHECK-DAG:      <<Arg:f\d+>>      ParameterValue
  /// CHECK-DAG:      <<ConstP5:f\d+>>  FloatConstant 0.5
  /// CHECK-DAG:      <<Mul:f\d+>>      Mul [<<Arg>>,<<ConstP5>>]
  /// CHECK-DAG:                        Return [<<Mul>>]

  /// CHECK-START: float Main.Div2(float) instruction_simplifier (after)
  /// CHECK-NOT:                        Div

  public static float Div2(float arg) {
    return arg / 2.0f;
  }

  /// CHECK-START: double Main.Div2(double) instruction_simplifier (before)
  /// CHECK-DAG:      <<Arg:d\d+>>      ParameterValue
  /// CHECK-DAG:      <<Const2:d\d+>>   DoubleConstant 2
  /// CHECK-DAG:      <<Div:d\d+>>      Div [<<Arg>>,<<Const2>>]
  /// CHECK-DAG:                        Return [<<Div>>]

  /// CHECK-START: double Main.Div2(double) instruction_simplifier (after)
  /// CHECK-DAG:      <<Arg:d\d+>>      ParameterValue
  /// CHECK-DAG:      <<ConstP5:d\d+>>  DoubleConstant 0.5
  /// CHECK-DAG:      <<Mul:d\d+>>      Mul [<<Arg>>,<<ConstP5>>]
  /// CHECK-DAG:                        Return [<<Mul>>]

  /// CHECK-START: double Main.Div2(double) instruction_simplifier (after)
  /// CHECK-NOT:                        Div
  public static double Div2(double arg) {
    return arg / 2.0;
  }

  /// CHECK-START: float Main.DivMP25(float) instruction_simplifier (before)
  /// CHECK-DAG:      <<Arg:f\d+>>      ParameterValue
  /// CHECK-DAG:      <<ConstMP25:f\d+>>   FloatConstant -0.25
  /// CHECK-DAG:      <<Div:f\d+>>      Div [<<Arg>>,<<ConstMP25>>]
  /// CHECK-DAG:                        Return [<<Div>>]

  /// CHECK-START: float Main.DivMP25(float) instruction_simplifier (after)
  /// CHECK-DAG:      <<Arg:f\d+>>      ParameterValue
  /// CHECK-DAG:      <<ConstM4:f\d+>>  FloatConstant -4
  /// CHECK-DAG:      <<Mul:f\d+>>      Mul [<<Arg>>,<<ConstM4>>]
  /// CHECK-DAG:                        Return [<<Mul>>]

  /// CHECK-START: float Main.DivMP25(float) instruction_simplifier (after)
  /// CHECK-NOT:                        Div

  public static float DivMP25(float arg) {
    return arg / -0.25f;
  }

  /// CHECK-START: double Main.DivMP25(double) instruction_simplifier (before)
  /// CHECK-DAG:      <<Arg:d\d+>>      ParameterValue
  /// CHECK-DAG:      <<ConstMP25:d\d+>>   DoubleConstant -0.25
  /// CHECK-DAG:      <<Div:d\d+>>      Div [<<Arg>>,<<ConstMP25>>]
  /// CHECK-DAG:                        Return [<<Div>>]

  /// CHECK-START: double Main.DivMP25(double) instruction_simplifier (after)
  /// CHECK-DAG:      <<Arg:d\d+>>      ParameterValue
  /// CHECK-DAG:      <<ConstM4:d\d+>>  DoubleConstant -4
  /// CHECK-DAG:      <<Mul:d\d+>>      Mul [<<Arg>>,<<ConstM4>>]
  /// CHECK-DAG:                        Return [<<Mul>>]

  /// CHECK-START: double Main.DivMP25(double) instruction_simplifier (after)
  /// CHECK-NOT:                        Div
  public static double DivMP25(double arg) {
    return arg / -0.25f;
  }

  public static void main(String[] args) {
    int arg = 123456;

    assertLongEquals(Add0(arg), arg);
    assertIntEquals(AndAllOnes(arg), arg);
    assertLongEquals(Div1(arg), arg);
    assertIntEquals(DivN1(arg), -arg);
    assertLongEquals(Mul1(arg), arg);
    assertIntEquals(MulN1(arg), -arg);
    assertLongEquals(MulPowerOfTwo128(arg), (128 * arg));
    assertIntEquals(Or0(arg), arg);
    assertLongEquals(OrSame(arg), arg);
    assertIntEquals(Shl0(arg), arg);
    assertLongEquals(Shr0(arg), arg);
    assertLongEquals(Sub0(arg), arg);
    assertIntEquals(SubAliasNeg(arg), -arg);
    assertLongEquals(UShr0(arg), arg);
    assertIntEquals(Xor0(arg), arg);
    assertIntEquals(XorAllOnes(arg), ~arg);
    assertIntEquals(AddNegs1(arg, arg + 1), -(arg + arg + 1));
    assertIntEquals(AddNegs2(arg, arg + 1), -(arg + arg + 1));
    assertLongEquals(AddNegs3(arg, arg + 1), -(2 * arg + 1));
    assertLongEquals(AddNeg1(arg, arg + 1), 1);
    assertLongEquals(AddNeg2(arg, arg + 1), -1);
    assertLongEquals(NegNeg1(arg), arg);
    assertIntEquals(NegNeg2(arg), 0);
    assertLongEquals(NegNeg3(arg), arg);
    assertIntEquals(NegSub1(arg, arg + 1), 1);
    assertIntEquals(NegSub2(arg, arg + 1), 1);
    assertLongEquals(NotNot1(arg), arg);
    assertIntEquals(NotNot2(arg), -1);
    assertIntEquals(SubNeg1(arg, arg + 1), -(arg + arg + 1));
    assertIntEquals(SubNeg2(arg, arg + 1), -(arg + arg + 1));
    assertLongEquals(SubNeg3(arg, arg + 1), -(2 * arg + 1));
    assertIntEquals(EqualTrueRhs(true), 5);
    assertIntEquals(EqualTrueLhs(true), 5);
    assertIntEquals(EqualFalseRhs(true), 3);
    assertIntEquals(EqualFalseLhs(true), 3);
    assertIntEquals(NotEqualTrueRhs(true), 3);
    assertIntEquals(NotEqualTrueLhs(true), 3);
    assertIntEquals(NotEqualFalseRhs(true), 5);
    assertIntEquals(NotEqualFalseLhs(true), 5);
    assertBooleanEquals(NotNotBool(true), true);
    assertBooleanEquals(NotNotBool(false), false);
    assertFloatEquals(Div2(100.0f), 50.0f);
    assertDoubleEquals(Div2(150.0), 75.0);
    assertFloatEquals(DivMP25(100.0f), -400.0f);
    assertDoubleEquals(DivMP25(150.0), -600.0);
    assertLongEquals(Shl1(100), 200);
  }
}