unittests/VMCore/ConstantsTest.cpp

   1 //===- llvm/unittest/VMCore/ConstantsTest.cpp - Constants 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/Constants.h"
  11 #include "llvm/DerivedTypes.h"
  12 #include "llvm/LLVMContext.h"
  13 #include "gtest/gtest.h"
  14
  15 namespace llvm {
  16 namespace {
  17
  18 TEST(ConstantsTest, Integer_i1) {
  19   const IntegerType* Int1 = IntegerType::get(getGlobalContext(), 1);
  20   Constant* One = ConstantInt::get(Int1, 1, true);
  21   Constant* Zero = ConstantInt::get(Int1, 0);
  22   Constant* NegOne = ConstantInt::get(Int1, static_cast<uint64_t>(-1), true);
  23   EXPECT_EQ(NegOne, ConstantInt::getSigned(Int1, -1));
  24   Constant* Undef = UndefValue::get(Int1);
  25
  26   // Input:  @b = constant i1 add(i1 1 , i1 1)
  27   // Output: @b = constant i1 false
  28   EXPECT_EQ(Zero, ConstantExpr::getAdd(One, One));
  29
  30   // @c = constant i1 add(i1 -1, i1 1)
  31   // @c = constant i1 false
  32   EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, One));
  33
  34   // @d = constant i1 add(i1 -1, i1 -1)
  35   // @d = constant i1 false
  36   EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, NegOne));
  37
  38   // @e = constant i1 sub(i1 -1, i1 1)
  39   // @e = constant i1 false
  40   EXPECT_EQ(Zero, ConstantExpr::getSub(NegOne, One));
  41
  42   // @f = constant i1 sub(i1 1 , i1 -1)
  43   // @f = constant i1 false
  44   EXPECT_EQ(Zero, ConstantExpr::getSub(One, NegOne));
  45
  46   // @g = constant i1 sub(i1 1 , i1 1)
  47   // @g = constant i1 false
  48   EXPECT_EQ(Zero, ConstantExpr::getSub(One, One));
  49
  50   // @h = constant i1 shl(i1 1 , i1 1)  ; undefined
  51   // @h = constant i1 undef
  52   EXPECT_EQ(Undef, ConstantExpr::getShl(One, One));
  53
  54   // @i = constant i1 shl(i1 1 , i1 0)
  55   // @i = constant i1 true
  56   EXPECT_EQ(One, ConstantExpr::getShl(One, Zero));
  57
  58   // @j = constant i1 lshr(i1 1, i1 1)  ; undefined
  59   // @j = constant i1 undef
  60   EXPECT_EQ(Undef, ConstantExpr::getLShr(One, One));
  61
  62   // @m = constant i1 ashr(i1 1, i1 1)  ; undefined
  63   // @m = constant i1 undef
  64   EXPECT_EQ(Undef, ConstantExpr::getAShr(One, One));
  65
  66   // @n = constant i1 mul(i1 -1, i1 1)
  67   // @n = constant i1 true
  68   EXPECT_EQ(One, ConstantExpr::getMul(NegOne, One));
  69
  70   // @o = constant i1 sdiv(i1 -1, i1 1) ; overflow
  71   // @o = constant i1 true
  72   EXPECT_EQ(One, ConstantExpr::getSDiv(NegOne, One));
  73
  74   // @p = constant i1 sdiv(i1 1 , i1 -1); overflow
  75   // @p = constant i1 true
  76   EXPECT_EQ(One, ConstantExpr::getSDiv(One, NegOne));
  77
  78   // @q = constant i1 udiv(i1 -1, i1 1)
  79   // @q = constant i1 true
  80   EXPECT_EQ(One, ConstantExpr::getUDiv(NegOne, One));
  81
  82   // @r = constant i1 udiv(i1 1, i1 -1)
  83   // @r = constant i1 true
  84   EXPECT_EQ(One, ConstantExpr::getUDiv(One, NegOne));
  85
  86   // @s = constant i1 srem(i1 -1, i1 1) ; overflow
  87   // @s = constant i1 false
  88   EXPECT_EQ(Zero, ConstantExpr::getSRem(NegOne, One));
  89
  90   // @t = constant i1 urem(i1 -1, i1 1)
  91   // @t = constant i1 false
  92   EXPECT_EQ(Zero, ConstantExpr::getURem(NegOne, One));
  93
  94   // @u = constant i1 srem(i1  1, i1 -1) ; overflow
  95   // @u = constant i1 false
  96   EXPECT_EQ(Zero, ConstantExpr::getSRem(One, NegOne));
  97 }
  98
  99 TEST(ConstantsTest, IntSigns) {
 100   const IntegerType* Int8Ty = Type::getInt8Ty(getGlobalContext());
 101   EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, false)->getSExtValue());
 102   EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, true)->getSExtValue());
 103   EXPECT_EQ(100, ConstantInt::getSigned(Int8Ty, 100)->getSExtValue());
 104   EXPECT_EQ(-50, ConstantInt::get(Int8Ty, 206)->getSExtValue());
 105   EXPECT_EQ(-50, ConstantInt::getSigned(Int8Ty, -50)->getSExtValue());
 106   EXPECT_EQ(206U, ConstantInt::getSigned(Int8Ty, -50)->getZExtValue());
 107
 108   // Overflow is handled by truncation.
 109   EXPECT_EQ(0x3b, ConstantInt::get(Int8Ty, 0x13b)->getSExtValue());
 110 }
 111
 112 TEST(ConstantsTest, FP128Test) {
 113   const Type *FP128Ty = Type::getFP128Ty(getGlobalContext());
 114
 115   const IntegerType *Int128Ty = Type::getIntNTy(getGlobalContext(), 128);
 116   Constant *Zero128 = Constant::getNullValue(Int128Ty);
 117   Constant *X = ConstantExpr::getUIToFP(Zero128, FP128Ty);
 118   EXPECT_TRUE(isa<ConstantFP>(X));
 119 }
 120
 121 }  // end anonymous namespace
 122 }  // end namespace llvm