unittests/IR/UserTest.cpp

   1 //===- llvm/unittest/IR/UserTest.cpp - User 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 #include "llvm/AsmParser/Parser.h"
  11 #include "llvm/IR/Function.h"
  12 #include "llvm/IR/Instructions.h"
  13 #include "llvm/IR/LLVMContext.h"
  14 #include "llvm/IR/Module.h"
  15 #include "llvm/IR/User.h"
  16 #include "llvm/Support/SourceMgr.h"
  17 #include "gtest/gtest.h"
  18 using namespace llvm;
  19
  20 namespace {
  21
  22 TEST(UserTest, ValueOpIteration) {
  23   LLVMContext C;
  24
  25   const char *ModuleString = "define void @f(i32 %x, i32 %y) {\n"
  26                              "entry:\n"
  27                              "  switch i32 undef, label %s0\n"
  28                              "      [ i32 1, label %s1\n"
  29                              "        i32 2, label %s2\n"
  30                              "        i32 3, label %s3\n"
  31                              "        i32 4, label %s4\n"
  32                              "        i32 5, label %s5\n"
  33                              "        i32 6, label %s6\n"
  34                              "        i32 7, label %s7\n"
  35                              "        i32 8, label %s8\n"
  36                              "        i32 9, label %s9 ]\n"
  37                              "\n"
  38                              "s0:\n"
  39                              "  br label %exit\n"
  40                              "s1:\n"
  41                              "  br label %exit\n"
  42                              "s2:\n"
  43                              "  br label %exit\n"
  44                              "s3:\n"
  45                              "  br label %exit\n"
  46                              "s4:\n"
  47                              "  br label %exit\n"
  48                              "s5:\n"
  49                              "  br label %exit\n"
  50                              "s6:\n"
  51                              "  br label %exit\n"
  52                              "s7:\n"
  53                              "  br label %exit\n"
  54                              "s8:\n"
  55                              "  br label %exit\n"
  56                              "s9:\n"
  57                              "  br label %exit\n"
  58                              "\n"
  59                              "exit:\n"
  60                              "  %phi = phi i32 [ 0, %s0 ], [ 1, %s1 ],\n"
  61                              "                 [ 2, %s2 ], [ 3, %s3 ],\n"
  62                              "                 [ 4, %s4 ], [ 5, %s5 ],\n"
  63                              "                 [ 6, %s6 ], [ 7, %s7 ],\n"
  64                              "                 [ 8, %s8 ], [ 9, %s9 ]\n"
  65                              "  ret void\n"
  66                              "}\n";
  67   SMDiagnostic Err;
  68   std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
  69
  70   Function *F = M->getFunction("f");
  71   BasicBlock &ExitBB = F->back();
  72   PHINode &P = cast<PHINode>(ExitBB.front());
  73   EXPECT_TRUE(P.value_op_begin() == P.value_op_begin());
  74   EXPECT_FALSE(P.value_op_begin() == P.value_op_end());
  75   EXPECT_TRUE(P.value_op_begin() != P.value_op_end());
  76   EXPECT_FALSE(P.value_op_end() != P.value_op_end());
  77   EXPECT_TRUE(P.value_op_begin() < P.value_op_end());
  78   EXPECT_FALSE(P.value_op_begin() < P.value_op_begin());
  79   EXPECT_TRUE(P.value_op_end() > P.value_op_begin());
  80   EXPECT_FALSE(P.value_op_begin() > P.value_op_begin());
  81   EXPECT_TRUE(P.value_op_begin() <= P.value_op_begin());
  82   EXPECT_FALSE(P.value_op_end() <= P.value_op_begin());
  83   EXPECT_TRUE(P.value_op_begin() >= P.value_op_begin());
  84   EXPECT_FALSE(P.value_op_begin() >= P.value_op_end());
  85   EXPECT_EQ(10, std::distance(P.value_op_begin(), P.value_op_end()));
  86
  87   User::value_op_iterator I = P.value_op_begin();
  88   I += 3;
  89   EXPECT_EQ(std::next(P.value_op_begin(), 3), I);
  90   EXPECT_EQ(P.getOperand(3), *I);
  91   I++;
  92   EXPECT_EQ(P.getOperand(6), I[2]);
  93   EXPECT_EQ(P.value_op_end(), (I - 2) + 8);
  94 }
  95
  96 TEST(UserTest, PersonalityUser) {
  97   Module M("", getGlobalContext());
  98   FunctionType *RetVoidTy =
  99       FunctionType::get(Type::getVoidTy(getGlobalContext()), false);
 100   Function *PersonalityF = Function::Create(
 101       RetVoidTy, GlobalValue::ExternalLinkage, "PersonalityFn", &M);
 102   Function *TestF =
 103       Function::Create(RetVoidTy, GlobalValue::ExternalLinkage, "TestFn", &M);
 104
 105   // Set up the personality function
 106   TestF->setPersonalityFn(PersonalityF);
 107   auto PersonalityUsers = PersonalityF->user_begin();
 108
 109   // One user and that user is the Test function
 110   EXPECT_EQ(*PersonalityUsers, TestF);
 111   EXPECT_EQ(++PersonalityUsers, PersonalityF->user_end());
 112
 113   // Reset the personality function
 114   TestF->setPersonalityFn(nullptr);
 115
 116   // No users should remain
 117   EXPECT_TRUE(TestF->user_empty());
 118 }
 119
 120 } // end anonymous namespace