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      1 //===- llvm/unittest/IR/WaymarkTest.cpp - getUser() unit tests ------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 // we perform white-box tests
     11 //
     12 #include "llvm/IR/Constants.h"
     13 #include "llvm/IR/Function.h"
     14 #include "llvm/IR/Instructions.h"
     15 #include "llvm/IR/LLVMContext.h"
     16 #include "gtest/gtest.h"
     17 #include <algorithm>
     18 
     19 namespace llvm {
     20 namespace {
     21 
     22 TEST(WaymarkTest, NativeArray) {
     23   LLVMContext Context;
     24   static uint8_t tail[22] = "s02s33s30y2y0s1x0syxS";
     25   Value * values[22];
     26   std::transform(tail, tail + 22, values, [&](char c) {
     27     return ConstantInt::get(Type::getInt8Ty(Context), c);
     28   });
     29   FunctionType *FT = FunctionType::get(Type::getVoidTy(Context), true);
     30   std::unique_ptr<Function> F(
     31       Function::Create(FT, GlobalValue::ExternalLinkage));
     32   const CallInst *A = CallInst::Create(F.get(), makeArrayRef(values));
     33   ASSERT_NE(A, (const CallInst*)nullptr);
     34   ASSERT_EQ(1U + 22, A->getNumOperands());
     35   const Use *U = &A->getOperandUse(0);
     36   const Use *Ue = &A->getOperandUse(22);
     37   for (; U != Ue; ++U)
     38   {
     39     EXPECT_EQ(A, U->getUser());
     40   }
     41   delete A;
     42 }
     43 
     44 TEST(WaymarkTest, TwoBit) {
     45   Use* many = (Use*)calloc(sizeof(Use), 8212 + 1);
     46   ASSERT_TRUE(many);
     47   Use::initTags(many, many + 8212);
     48   for (Use *U = many, *Ue = many + 8212 - 1; U != Ue; ++U)
     49   {
     50     EXPECT_EQ(reinterpret_cast<User *>(Ue + 1), U->getUser());
     51   }
     52   free(many);
     53 }
     54 
     55 }  // end anonymous namespace
     56 }  // end namespace llvm
     57