unittests/IR/WaymarkTest.cpp

   1 //===- llvm/unittest/IR/WaymarkTest.cpp - getUser() unit 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-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // we perform white-box tests
  10 //
  11 #include "llvm/IR/Constants.h"
  12 #include "llvm/IR/Function.h"
  13 #include "llvm/IR/Instructions.h"
  14 #include "llvm/IR/LLVMContext.h"
  15 #include "gtest/gtest.h"
  16 #include <algorithm>
  17
  18 namespace llvm {
  19 namespace {
  20
  21 TEST(WaymarkTest, NativeArray) {
  22   LLVMContext Context;
  23   static uint8_t tail[22] = "s02s33s30y2y0s1x0syxS";
  24   Value * values[22];
  25   std::transform(tail, tail + 22, values, [&](char c) {
  26     return ConstantInt::get(Type::getInt8Ty(Context), c);
  27   });
  28   FunctionType *FT = FunctionType::get(Type::getVoidTy(Context), true);
  29   std::unique_ptr<Function> F(
  30       Function::Create(FT, GlobalValue::ExternalLinkage));
  31   const CallInst *A = CallInst::Create(F.get(), makeArrayRef(values));
  32   ASSERT_NE(A, (const CallInst*)nullptr);
  33   ASSERT_EQ(1U + 22, A->getNumOperands());
  34   const Use *U = &A->getOperandUse(0);
  35   const Use *Ue = &A->getOperandUse(22);
  36   for (; U != Ue; ++U)
  37   {
  38     EXPECT_EQ(A, U->getUser());
  39   }
  40   delete A;
  41 }
  42
  43 TEST(WaymarkTest, TwoBit) {
  44   Use* many = (Use*)calloc(sizeof(Use), 8212 + 1);
  45   ASSERT_TRUE(many);
  46   Use::initTags(many, many + 8212);
  47   for (Use *U = many, *Ue = many + 8212 - 1; U != Ue; ++U)
  48   {
  49     EXPECT_EQ(reinterpret_cast<User *>(Ue + 1), U->getUser());
  50   }
  51   free(many);
  52 }
  53
  54 }  // end anonymous namespace
  55 }  // end namespace llvm