unittests/Analysis/CallGraphTest.cpp

   1 //=======- CallGraphTest.cpp - Unit tests for the CG analysis -------------===//
   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/Analysis/CallGraph.h"
  11 #include "llvm/IR/LLVMContext.h"
  12 #include "llvm/IR/Module.h"
  13 #include "gtest/gtest.h"
  14
  15 using namespace llvm;
  16
  17 namespace {
  18
  19 template <typename Ty> void canSpecializeGraphTraitsIterators(Ty *G) {
  20   typedef typename GraphTraits<Ty *>::NodeRef NodeRef;
  21
  22   auto I = GraphTraits<Ty *>::nodes_begin(G);
  23   auto E = GraphTraits<Ty *>::nodes_end(G);
  24   auto X = ++I;
  25
  26   // Should be able to iterate over all nodes of the graph.
  27   static_assert(std::is_same<decltype(*I), NodeRef>::value,
  28                 "Node type does not match");
  29   static_assert(std::is_same<decltype(*X), NodeRef>::value,
  30                 "Node type does not match");
  31   static_assert(std::is_same<decltype(*E), NodeRef>::value,
  32                 "Node type does not match");
  33
  34   NodeRef N = GraphTraits<Ty *>::getEntryNode(G);
  35
  36   auto S = GraphTraits<NodeRef>::child_begin(N);
  37   auto F = GraphTraits<NodeRef>::child_end(N);
  38
  39   // Should be able to iterate over immediate successors of a node.
  40   static_assert(std::is_same<decltype(*S), NodeRef>::value,
  41                 "Node type does not match");
  42   static_assert(std::is_same<decltype(*F), NodeRef>::value,
  43                 "Node type does not match");
  44 }
  45
  46 TEST(CallGraphTest, GraphTraitsSpecialization) {
  47   LLVMContext Context;
  48   Module M("", Context);
  49   CallGraph CG(M);
  50
  51   canSpecializeGraphTraitsIterators(&CG);
  52 }
  53
  54 TEST(CallGraphTest, GraphTraitsConstSpecialization) {
  55   LLVMContext Context;
  56   Module M("", Context);
  57   CallGraph CG(M);
  58
  59   canSpecializeGraphTraitsIterators(const_cast<const CallGraph *>(&CG));
  60 }
  61 }