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1//===- llvm/unittest/CodeGen/AllocationOrderTest.cpp - AllocationOrder tests =//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "../lib/CodeGen/AllocationOrder.h"10#include "gtest/gtest.h"11 12using namespace llvm;13 14namespace {15std::vector<MCPhysReg> loadOrder(const AllocationOrder &O, unsigned Limit = 0) {16  std::vector<MCPhysReg> Ret;17  if (Limit == 0)18    for (auto R : O)19      Ret.push_back(R);20  else21    for (auto I = O.begin(), E = O.getOrderLimitEnd(Limit); I != E; ++I)22      Ret.push_back(*I);23  return Ret;24}25} // namespace26 27TEST(AllocationOrderTest, Basic) {28  SmallVector<MCPhysReg, 16> Hints = {1, 2, 3};29  SmallVector<MCPhysReg, 16> Order = {4, 5, 6, 7};30  AllocationOrder O(std::move(Hints), Order, false);31  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3, 4, 5, 6, 7}), loadOrder(O));32}33 34TEST(AllocationOrderTest, Duplicates) {35  SmallVector<MCPhysReg, 16> Hints = {1, 2, 3};36  SmallVector<MCPhysReg, 16> Order = {4, 1, 5, 6};37  AllocationOrder O(std::move(Hints), Order, false);38  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3, 4, 5, 6}), loadOrder(O));39}40 41TEST(AllocationOrderTest, HardHints) {42  SmallVector<MCPhysReg, 16> Hints = {1, 2, 3};43  SmallVector<MCPhysReg, 16> Order = {4, 5, 6, 7};44  AllocationOrder O(std::move(Hints), Order, true);45  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3}), loadOrder(O));46}47 48TEST(AllocationOrderTest, LimitsBasic) {49  SmallVector<MCPhysReg, 16> Hints = {1, 2, 3};50  SmallVector<MCPhysReg, 16> Order = {4, 5, 6, 7};51  AllocationOrder O(std::move(Hints), Order, false);52  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3, 4, 5, 6, 7}), loadOrder(O, 0));53  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3, 4}), loadOrder(O, 1));54  EXPECT_EQ(O.end(), O.getOrderLimitEnd(0));55}56 57TEST(AllocationOrderTest, LimitsDuplicates) {58  SmallVector<MCPhysReg, 16> Hints = {1, 2, 3};59  SmallVector<MCPhysReg, 16> Order = {4, 1, 5, 6};60  AllocationOrder O(std::move(Hints), Order, false);61  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3, 4}), loadOrder(O, 1));62  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3, 4}), loadOrder(O, 2));63  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3, 4, 5}), loadOrder(O, 3));64  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3, 4, 5, 6}), loadOrder(O, 4));65}66 67TEST(AllocationOrderTest, LimitsHardHints) {68  SmallVector<MCPhysReg, 16> Hints = {1, 2, 3};69  SmallVector<MCPhysReg, 16> Order = {4, 1, 5, 6};70  AllocationOrder O(std::move(Hints), Order, true);71  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3}), loadOrder(O, 1));72}73 74TEST(AllocationOrderTest, DuplicateIsFirst) {75  SmallVector<MCPhysReg, 16> Hints = {1, 2, 3};76  SmallVector<MCPhysReg, 16> Order = {1, 4, 5, 6};77  AllocationOrder O(std::move(Hints), Order, false);78  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3, 4, 5, 6}), loadOrder(O));79}80 81TEST(AllocationOrderTest, DuplicateIsFirstWithLimits) {82  SmallVector<MCPhysReg, 16> Hints = {1, 2, 3};83  SmallVector<MCPhysReg, 16> Order = {1, 4, 5, 6};84  AllocationOrder O(std::move(Hints), Order, false);85  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3}), loadOrder(O, 1));86  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3, 4}), loadOrder(O, 2));87  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3, 4, 5}), loadOrder(O, 3));88}89 90TEST(AllocationOrderTest, NoHints) {91  SmallVector<MCPhysReg, 16> Hints;92  SmallVector<MCPhysReg, 16> Order = {1, 2, 3, 4};93  AllocationOrder O(std::move(Hints), Order, false);94  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3, 4}), loadOrder(O));95  EXPECT_EQ((std::vector<MCPhysReg>{1, 2}), loadOrder(O, 2));96  EXPECT_EQ((std::vector<MCPhysReg>{1, 2, 3}), loadOrder(O, 3));97}98 99TEST(AllocationOrderTest, IsHintTest) {100  SmallVector<MCPhysReg, 16> Hints = {1, 2, 3};101  SmallVector<MCPhysReg, 16> Order = {4, 1, 5, 6};102  AllocationOrder O(std::move(Hints), Order, false);103  auto I = O.begin();104  auto V = *I;105  EXPECT_TRUE(I.isHint());106  EXPECT_EQ(V, 1U);107  ++I;108  EXPECT_TRUE(I.isHint());109  ++I;110  EXPECT_TRUE(I.isHint());111  V = *(++I);112  EXPECT_FALSE(I.isHint());113  EXPECT_EQ(V, 4U);114  V = *(++I);115  EXPECT_TRUE(O.isHint(1));116  EXPECT_FALSE(I.isHint());117  EXPECT_EQ(V, 5U);118}119