v8/test/mjsunit/compiler/rotate.js

// Copyright 2012 the V8 project authors. All rights reserved.
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// Flags: --allow-natives-syntax --expose-gc

// Test shift operations that can be replaced by rotate operation.

function SideEffect() {
  with ({}) { }  // not inlinable
}

function Twenty() {
  SideEffect();
  return 20;
}

function Twelve() {
  SideEffect();
  return 12;
}


function ROR(x, sa) {
  return (x >>> sa) | (x << (32 - sa));
}

function ROR1(x, sa) {
  return (x >>> sa) | (x << (32 - sa));
}

function ROR2(x, sa) {
  return (x >>> (32 - sa)) | (x << (sa));
}

function ROR3(x, sa) {
  return (x << (32 - sa)) | (x >>> sa);
}

function ROR4(x, sa) {
  return (x << (sa)) | (x >>> (32 - sa));
}

assertEquals(1 << ((2 % 32)), ROR(1, 30));
assertEquals(1 << ((2 % 32)), ROR(1, 30));
%OptimizeFunctionOnNextCall(ROR);
assertEquals(1 << ((2 % 32)), ROR(1, 30));

assertEquals(0xF0000FFF | 0, ROR1(0x0000FFFF, 4));
assertEquals(0xF0000FFF | 0, ROR1(0x0000FFFF, 4));
%OptimizeFunctionOnNextCall(ROR1);
assertEquals(0xF0000FFF | 0, ROR1(0x0000FFFF, 4));

assertEquals(0x0FFFF000 | 0, ROR1(0x0000FFFF, 20));
assertEquals(0x0FFFF000 | 0, ROR1(0x0000FFFF, 20));
%OptimizeFunctionOnNextCall(ROR1);
assertEquals(0x0FFFF000 | 0, ROR1(0x0000FFFF, 20));

assertEquals(0x0FFFF000 | 0, ROR1(0x0000FFFF, Twenty()));
assertEquals(0x0FFFF000 | 0, ROR1(0x0000FFFF, Twenty()));
%OptimizeFunctionOnNextCall(ROR1);
assertEquals(0x0FFFF000 | 0, ROR1(0x0000FFFF, Twenty()));

for (var i = 0; i <= 100; i++) {
  assertEquals(0xFFFFFFFF | 0, ROR1(0xFFFFFFFF, i));
  assertEquals(0xFFFFFFFF | 0, ROR1(0xFFFFFFFF, i));
  %OptimizeFunctionOnNextCall(ROR1);
  assertEquals(0xFFFFFFFF | 0, ROR1(0xFFFFFFFF, i));
}

for (var i = 0; i <= 100; i++) {
  assertEquals(-1, ROR1(-1, i));
  assertEquals(-1, ROR1(-1, i));
  %OptimizeFunctionOnNextCall(ROR1);
  assertEquals(-1, ROR1(-1, i));
}

for (var i = 0; i <= 100; i++) {
  assertEquals(1 << (32 - (i % 32)), ROR1(1, i));
  assertEquals(1 << (32 - (i % 32)), ROR1(1, i));
  %OptimizeFunctionOnNextCall(ROR1);
  assertEquals(1 << (32 - (i % 32)), ROR1(1, i));
}

for (var i = 0; i <= 100; i++) {
  assertEquals(1 << (32 - (i % 32)), ROR1(1.4, i));
  assertEquals(1 << (32 - (i % 32)), ROR1(1.4, i));
  %OptimizeFunctionOnNextCall(ROR1);
  assertEquals(1 << (32 - (i % 32)), ROR1(1.4, i));
}



assertEquals(0xF0000FFF | 0, ROR2(0x0000FFFF, 28));
assertEquals(0xF0000FFF | 0, ROR2(0x0000FFFF, 28));
%OptimizeFunctionOnNextCall(ROR2);
assertEquals(0xF0000FFF | 0, ROR2(0x0000FFFF, 28));

assertEquals(0x0FFFF000 | 0, ROR2(0x0000FFFF, 12));
assertEquals(0x0FFFF000 | 0, ROR2(0x0000FFFF, 12));
%OptimizeFunctionOnNextCall(ROR2);
assertEquals(0x0FFFF000 | 0, ROR2(0x0000FFFF, 12));

assertEquals(0x0FFFF000 | 0, ROR2(0x0000FFFF, Twelve()));
assertEquals(0x0FFFF000 | 0, ROR2(0x0000FFFF, Twelve()));
%OptimizeFunctionOnNextCall(ROR2);
assertEquals(0x0FFFF000 | 0, ROR2(0x0000FFFF, Twelve()));

for (var i = 0; i <= 100; i++) {
  assertEquals(0xFFFFFFFF | 0, ROR2(0xFFFFFFFF, i));
  assertEquals(0xFFFFFFFF | 0, ROR2(0xFFFFFFFF, i));
  %OptimizeFunctionOnNextCall(ROR2);
  assertEquals(0xFFFFFFFF | 0, ROR2(0xFFFFFFFF, i));
}

for (var i = 0; i <= 100; i++) {
  assertEquals(-1, ROR2(-1, i));
  assertEquals(-1, ROR2(-1, i));
  %OptimizeFunctionOnNextCall(ROR2);
  assertEquals(-1, ROR2(-1, i));
}

for (var i = 0; i <= 100; i++) {
  assertEquals(1 << ((i % 32)), ROR2(1, i));
  assertEquals(1 << ((i % 32)), ROR2(1, i));
  %OptimizeFunctionOnNextCall(ROR2);
  assertEquals(1 << ((i % 32)), ROR2(1, i));
}

assertEquals(0xF0000FFF | 0, ROR3(0x0000FFFF, 4));
assertEquals(0xF0000FFF | 0, ROR3(0x0000FFFF, 4));
%OptimizeFunctionOnNextCall(ROR3);
assertEquals(0xF0000FFF | 0, ROR3(0x0000FFFF, 4));

assertEquals(0x0FFFF000 | 0, ROR3(0x0000FFFF, 20));
assertEquals(0x0FFFF000 | 0, ROR3(0x0000FFFF, 20));
%OptimizeFunctionOnNextCall(ROR3);
assertEquals(0x0FFFF000 | 0, ROR3(0x0000FFFF, 20));

assertEquals(0x0FFFF000 | 0, ROR3(0x0000FFFF, Twenty()));
assertEquals(0x0FFFF000 | 0, ROR3(0x0000FFFF, Twenty()));
%OptimizeFunctionOnNextCall(ROR3);
assertEquals(0x0FFFF000 | 0, ROR3(0x0000FFFF, Twenty()));

for (var i = 0; i <= 100; i++) {
  assertEquals(0xFFFFFFFF | 0, ROR3(0xFFFFFFFF, i));
  assertEquals(0xFFFFFFFF | 0, ROR3(0xFFFFFFFF, i));
  %OptimizeFunctionOnNextCall(ROR3);
  assertEquals(0xFFFFFFFF | 0, ROR3(0xFFFFFFFF, i));
}

for (var i = 0; i <= 100; i++) {
  assertEquals(-1, ROR3(-1, i));
  assertEquals(-1, ROR3(-1, i));
  %OptimizeFunctionOnNextCall(ROR3);
  assertEquals(-1, ROR3(-1, i));
}

for (var i = 0; i <= 100; i++) {
  assertEquals(1 << (32 - (i % 32)), ROR3(1, i));
  assertEquals(1 << (32 - (i % 32)), ROR3(1, i));
  %OptimizeFunctionOnNextCall(ROR3);
  assertEquals(1 << (32 - (i % 32)), ROR3(1, i));
}

assertEquals(0xF0000FFF | 0, ROR4(0x0000FFFF, 28));
assertEquals(0xF0000FFF | 0, ROR4(0x0000FFFF, 28));
%OptimizeFunctionOnNextCall(ROR4);
assertEquals(0xF0000FFF | 0, ROR4(0x0000FFFF, 28));

assertEquals(0x0FFFF000 | 0, ROR4(0x0000FFFF, 12));
assertEquals(0x0FFFF000 | 0, ROR4(0x0000FFFF, 12));
%OptimizeFunctionOnNextCall(ROR4);
assertEquals(0x0FFFF000 | 0, ROR4(0x0000FFFF, 12));

assertEquals(0x0FFFF000 | 0, ROR4(0x0000FFFF, Twelve()));
assertEquals(0x0FFFF000 | 0, ROR4(0x0000FFFF, Twelve()));
%OptimizeFunctionOnNextCall(ROR4);
assertEquals(0x0FFFF000 | 0, ROR4(0x0000FFFF, Twelve()));

for (var i = 0; i <= 100; i++) {
  assertEquals(0xFFFFFFFF | 0, ROR4(0xFFFFFFFF, i));
  assertEquals(0xFFFFFFFF | 0, ROR4(0xFFFFFFFF, i));
  %OptimizeFunctionOnNextCall(ROR4);
  assertEquals(0xFFFFFFFF | 0, ROR4(0xFFFFFFFF, i));
}

for (var i = 0; i <= 100; i++) {
  assertEquals(-1, ROR4(-1, i));
  assertEquals(-1, ROR4(-1, i));
  %OptimizeFunctionOnNextCall(ROR4);
  assertEquals(-1, ROR4(-1, i));
}

for (var i = 0; i <= 100; i++) {
  assertEquals(1 << ((i % 32)), ROR4(1, i));
  assertEquals(1 << ((i % 32)), ROR4(1, i));
  %OptimizeFunctionOnNextCall(ROR4);
  assertEquals(1 << ((i % 32)), ROR4(1, i));
}