unittests/ExecutionEngine/Orc/SymbolStringPoolTest.cpp

   1 //===----- SymbolStringPoolTest.cpp - Unit tests for SymbolStringPool -----===//
   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 #include "llvm/ExecutionEngine/Orc/SymbolStringPool.h"
  10 #include "gtest/gtest.h"
  11
  12 using namespace llvm;
  13 using namespace llvm::orc;
  14
  15 namespace {
  16
  17 TEST(SymbolStringPool, UniquingAndComparisons) {
  18   SymbolStringPool SP;
  19   auto P1 = SP.intern("hello");
  20
  21   std::string S("hel");
  22   S += "lo";
  23   auto P2 = SP.intern(S);
  24
  25   auto P3 = SP.intern("goodbye");
  26
  27   EXPECT_EQ(P1, P2) << "Failed to unique entries";
  28   EXPECT_NE(P1, P3) << "Inequal pooled symbol strings comparing equal";
  29
  30   // We want to test that less-than comparison of SymbolStringPtrs compiles,
  31   // however we can't test the actual result as this is a pointer comparison and
  32   // SymbolStringPtr doesn't expose the underlying address of the string.
  33   (void)(P1 < P3);
  34 }
  35
  36 TEST(SymbolStringPool, Dereference) {
  37   SymbolStringPool SP;
  38   auto Foo = SP.intern("foo");
  39   EXPECT_EQ(*Foo, "foo") << "Equality on dereferenced string failed";
  40 }
  41
  42 TEST(SymbolStringPool, ClearDeadEntries) {
  43   SymbolStringPool SP;
  44   {
  45     auto P1 = SP.intern("s1");
  46     SP.clearDeadEntries();
  47     EXPECT_FALSE(SP.empty()) << "\"s1\" entry in pool should still be retained";
  48   }
  49   SP.clearDeadEntries();
  50   EXPECT_TRUE(SP.empty()) << "pool should be empty";
  51 }
  52
  53 }