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