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 
char2constant(char c)22 Constant *char2constant(char c) {
23   return ConstantInt::get(Type::getInt8Ty(getGlobalContext()), c);
24 }
25 
26 
TEST(WaymarkTest,NativeArray)27 TEST(WaymarkTest, NativeArray) {
28   static uint8_t tail[22] = "s02s33s30y2y0s1x0syxS";
29   Value * values[22];
30   std::transform(tail, tail + 22, values, char2constant);
31   FunctionType *FT = FunctionType::get(Type::getVoidTy(getGlobalContext()), true);
32   std::unique_ptr<Function> F(
33       Function::Create(FT, GlobalValue::ExternalLinkage));
34   const CallInst *A = CallInst::Create(F.get(), makeArrayRef(values));
35   ASSERT_NE(A, (const CallInst*)nullptr);
36   ASSERT_EQ(1U + 22, A->getNumOperands());
37   const Use *U = &A->getOperandUse(0);
38   const Use *Ue = &A->getOperandUse(22);
39   for (; U != Ue; ++U)
40   {
41     EXPECT_EQ(A, U->getUser());
42   }
43   delete A;
44 }
45 
TEST(WaymarkTest,TwoBit)46 TEST(WaymarkTest, TwoBit) {
47   Use* many = (Use*)calloc(sizeof(Use), 8212 + 1);
48   ASSERT_TRUE(many);
49   Use::initTags(many, many + 8212);
50   for (Use *U = many, *Ue = many + 8212 - 1; U != Ue; ++U)
51   {
52     EXPECT_EQ(reinterpret_cast<User *>(Ue + 1), U->getUser());
53   }
54   free(many);
55 }
56 
57 }  // end anonymous namespace
58 }  // end namespace llvm
59