src/llvm/unittests/IR/ValueTest.cpp

   1 //===- llvm/unittest/IR/ValueTest.cpp - Value 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/LLVMContext.h"
  13 #include "llvm/IR/Module.h"
  14 #include "llvm/IR/Value.h"
  15 #include "llvm/Support/SourceMgr.h"
  16 #include "gtest/gtest.h"
  17 using namespace llvm;
  18
  19 namespace {
  20
  21 TEST(ValueTest, UsedInBasicBlock) {
  22   LLVMContext C;
  23
  24   const char *ModuleString = "define void @f(i32 %x, i32 %y) {\n"
  25                              "bb0:\n"
  26                              "  %y1 = add i32 %y, 1\n"
  27                              "  %y2 = add i32 %y, 1\n"
  28                              "  %y3 = add i32 %y, 1\n"
  29                              "  %y4 = add i32 %y, 1\n"
  30                              "  %y5 = add i32 %y, 1\n"
  31                              "  %y6 = add i32 %y, 1\n"
  32                              "  %y7 = add i32 %y, 1\n"
  33                              "  %y8 = add i32 %x, 1\n"
  34                              "  ret void\n"
  35                              "}\n";
  36   SMDiagnostic Err;
  37   std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
  38
  39   Function *F = M->getFunction("f");
  40
  41   EXPECT_FALSE(F->isUsedInBasicBlock(F->begin()));
  42   EXPECT_TRUE((++F->arg_begin())->isUsedInBasicBlock(F->begin()));
  43   EXPECT_TRUE(F->arg_begin()->isUsedInBasicBlock(F->begin()));
  44 }
  45
  46 TEST(GlobalTest, CreateAddressSpace) {
  47   LLVMContext &Ctx = getGlobalContext();
  48   std::unique_ptr<Module> M(new Module("TestModule", Ctx));
  49   Type *Int8Ty = Type::getInt8Ty(Ctx);
  50   Type *Int32Ty = Type::getInt32Ty(Ctx);
  51
  52   GlobalVariable *Dummy0
  53     = new GlobalVariable(*M,
  54                          Int32Ty,
  55                          true,
  56                          GlobalValue::ExternalLinkage,
  57                          Constant::getAllOnesValue(Int32Ty),
  58                          "dummy",
  59                          nullptr,
  60                          GlobalVariable::NotThreadLocal,
  61                          1);
  62
  63   EXPECT_TRUE(Value::MaximumAlignment == 536870912U);
  64   Dummy0->setAlignment(536870912U);
  65   EXPECT_EQ(Dummy0->getAlignment(), 536870912U);
  66
  67   // Make sure the address space isn't dropped when returning this.
  68   Constant *Dummy1 = M->getOrInsertGlobal("dummy", Int32Ty);
  69   EXPECT_EQ(Dummy0, Dummy1);
  70   EXPECT_EQ(1u, Dummy1->getType()->getPointerAddressSpace());
  71
  72
  73   // This one requires a bitcast, but the address space must also stay the same.
  74   GlobalVariable *DummyCast0
  75     = new GlobalVariable(*M,
  76                          Int32Ty,
  77                          true,
  78                          GlobalValue::ExternalLinkage,
  79                          Constant::getAllOnesValue(Int32Ty),
  80                          "dummy_cast",
  81                          nullptr,
  82                          GlobalVariable::NotThreadLocal,
  83                          1);
  84
  85   // Make sure the address space isn't dropped when returning this.
  86   Constant *DummyCast1 = M->getOrInsertGlobal("dummy_cast", Int8Ty);
  87   EXPECT_EQ(1u, DummyCast1->getType()->getPointerAddressSpace());
  88   EXPECT_NE(DummyCast0, DummyCast1) << *DummyCast1;
  89 }
  90
  91 #ifdef GTEST_HAS_DEATH_TEST
  92 #ifndef NDEBUG
  93 TEST(GlobalTest, AlignDeath) {
  94   LLVMContext &Ctx = getGlobalContext();
  95   std::unique_ptr<Module> M(new Module("TestModule", Ctx));
  96   Type *Int32Ty = Type::getInt32Ty(Ctx);
  97   GlobalVariable *Var =
  98       new GlobalVariable(*M, Int32Ty, true, GlobalValue::ExternalLinkage,
  99                          Constant::getAllOnesValue(Int32Ty), "var", nullptr,
 100                          GlobalVariable::NotThreadLocal, 1);
 101
 102   EXPECT_DEATH(Var->setAlignment(536870913U), "Alignment is not a power of 2");
 103   EXPECT_DEATH(Var->setAlignment(1073741824U),
 104                "Alignment is greater than MaximumAlignment");
 105 }
 106 #endif
 107 #endif
 108
 109 } // end anonymous namespace