unittests/IR/InstructionsTest.cpp

   1 //===- llvm/unittest/IR/InstructionsTest.cpp - Instructions 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/IR/Instructions.h"
  11 #include "llvm/ADT/STLExtras.h"
  12 #include "llvm/Analysis/ValueTracking.h"
  13 #include "llvm/IR/BasicBlock.h"
  14 #include "llvm/IR/Constants.h"
  15 #include "llvm/IR/DataLayout.h"
  16 #include "llvm/IR/DerivedTypes.h"
  17 #include "llvm/IR/IRBuilder.h"
  18 #include "llvm/IR/LLVMContext.h"
  19 #include "llvm/IR/MDBuilder.h"
  20 #include "llvm/IR/Operator.h"
  21 #include "gtest/gtest.h"
  22
  23 namespace llvm {
  24 namespace {
  25
  26 TEST(InstructionsTest, ReturnInst) {
  27   LLVMContext &C(getGlobalContext());
  28
  29   // test for PR6589
  30   const ReturnInst* r0 = ReturnInst::Create(C);
  31   EXPECT_EQ(r0->getNumOperands(), 0U);
  32   EXPECT_EQ(r0->op_begin(), r0->op_end());
  33
  34   IntegerType* Int1 = IntegerType::get(C, 1);
  35   Constant* One = ConstantInt::get(Int1, 1, true);
  36   const ReturnInst* r1 = ReturnInst::Create(C, One);
  37   EXPECT_EQ(1U, r1->getNumOperands());
  38   User::const_op_iterator b(r1->op_begin());
  39   EXPECT_NE(r1->op_end(), b);
  40   EXPECT_EQ(One, *b);
  41   EXPECT_EQ(One, r1->getOperand(0));
  42   ++b;
  43   EXPECT_EQ(r1->op_end(), b);
  44
  45   // clean up
  46   delete r0;
  47   delete r1;
  48 }
  49
  50 TEST(InstructionsTest, BranchInst) {
  51   LLVMContext &C(getGlobalContext());
  52
  53   // Make a BasicBlocks
  54   BasicBlock* bb0 = BasicBlock::Create(C);
  55   BasicBlock* bb1 = BasicBlock::Create(C);
  56
  57   // Mandatory BranchInst
  58   const BranchInst* b0 = BranchInst::Create(bb0);
  59
  60   EXPECT_TRUE(b0->isUnconditional());
  61   EXPECT_FALSE(b0->isConditional());
  62   EXPECT_EQ(1U, b0->getNumSuccessors());
  63
  64   // check num operands
  65   EXPECT_EQ(1U, b0->getNumOperands());
  66
  67   EXPECT_NE(b0->op_begin(), b0->op_end());
  68   EXPECT_EQ(b0->op_end(), llvm::next(b0->op_begin()));
  69
  70   EXPECT_EQ(b0->op_end(), llvm::next(b0->op_begin()));
  71
  72   IntegerType* Int1 = IntegerType::get(C, 1);
  73   Constant* One = ConstantInt::get(Int1, 1, true);
  74
  75   // Conditional BranchInst
  76   BranchInst* b1 = BranchInst::Create(bb0, bb1, One);
  77
  78   EXPECT_FALSE(b1->isUnconditional());
  79   EXPECT_TRUE(b1->isConditional());
  80   EXPECT_EQ(2U, b1->getNumSuccessors());
  81
  82   // check num operands
  83   EXPECT_EQ(3U, b1->getNumOperands());
  84
  85   User::const_op_iterator b(b1->op_begin());
  86
  87   // check COND
  88   EXPECT_NE(b, b1->op_end());
  89   EXPECT_EQ(One, *b);
  90   EXPECT_EQ(One, b1->getOperand(0));
  91   EXPECT_EQ(One, b1->getCondition());
  92   ++b;
  93
  94   // check ELSE
  95   EXPECT_EQ(bb1, *b);
  96   EXPECT_EQ(bb1, b1->getOperand(1));
  97   EXPECT_EQ(bb1, b1->getSuccessor(1));
  98   ++b;
  99
 100   // check THEN
 101   EXPECT_EQ(bb0, *b);
 102   EXPECT_EQ(bb0, b1->getOperand(2));
 103   EXPECT_EQ(bb0, b1->getSuccessor(0));
 104   ++b;
 105
 106   EXPECT_EQ(b1->op_end(), b);
 107
 108   // clean up
 109   delete b0;
 110   delete b1;
 111
 112   delete bb0;
 113   delete bb1;
 114 }
 115
 116 TEST(InstructionsTest, CastInst) {
 117   LLVMContext &C(getGlobalContext());
 118
 119   Type* Int8Ty = Type::getInt8Ty(C);
 120   Type* Int64Ty = Type::getInt64Ty(C);
 121   Type* V8x8Ty = VectorType::get(Int8Ty, 8);
 122   Type* V8x64Ty = VectorType::get(Int64Ty, 8);
 123   Type* X86MMXTy = Type::getX86_MMXTy(C);
 124
 125   const Constant* c8 = Constant::getNullValue(V8x8Ty);
 126   const Constant* c64 = Constant::getNullValue(V8x64Ty);
 127
 128   EXPECT_TRUE(CastInst::isCastable(V8x8Ty, X86MMXTy));
 129   EXPECT_TRUE(CastInst::isCastable(X86MMXTy, V8x8Ty));
 130   EXPECT_FALSE(CastInst::isCastable(Int64Ty, X86MMXTy));
 131   EXPECT_TRUE(CastInst::isCastable(V8x64Ty, V8x8Ty));
 132   EXPECT_TRUE(CastInst::isCastable(V8x8Ty, V8x64Ty));
 133   EXPECT_EQ(CastInst::Trunc, CastInst::getCastOpcode(c64, true, V8x8Ty, true));
 134   EXPECT_EQ(CastInst::SExt, CastInst::getCastOpcode(c8, true, V8x64Ty, true));
 135 }
 136
 137
 138
 139 TEST(InstructionsTest, VectorGep) {
 140   LLVMContext &C(getGlobalContext());
 141
 142   // Type Definitions
 143   PointerType *Ptri8Ty = PointerType::get(IntegerType::get(C, 8), 0);
 144   PointerType *Ptri32Ty = PointerType::get(IntegerType::get(C, 8), 0);
 145
 146   VectorType *V2xi8PTy = VectorType::get(Ptri8Ty, 2);
 147   VectorType *V2xi32PTy = VectorType::get(Ptri32Ty, 2);
 148
 149   // Test different aspects of the vector-of-pointers type
 150   // and GEPs which use this type.
 151   ConstantInt *Ci32a = ConstantInt::get(C, APInt(32, 1492));
 152   ConstantInt *Ci32b = ConstantInt::get(C, APInt(32, 1948));
 153   std::vector<Constant*> ConstVa(2, Ci32a);
 154   std::vector<Constant*> ConstVb(2, Ci32b);
 155   Constant *C2xi32a = ConstantVector::get(ConstVa);
 156   Constant *C2xi32b = ConstantVector::get(ConstVb);
 157
 158   CastInst *PtrVecA = new IntToPtrInst(C2xi32a, V2xi32PTy);
 159   CastInst *PtrVecB = new IntToPtrInst(C2xi32b, V2xi32PTy);
 160
 161   ICmpInst *ICmp0 = new ICmpInst(ICmpInst::ICMP_SGT, PtrVecA, PtrVecB);
 162   ICmpInst *ICmp1 = new ICmpInst(ICmpInst::ICMP_ULT, PtrVecA, PtrVecB);
 163   EXPECT_NE(ICmp0, ICmp1); // suppress warning.
 164
 165   BasicBlock* BB0 = BasicBlock::Create(C);
 166   // Test InsertAtEnd ICmpInst constructor.
 167   ICmpInst *ICmp2 = new ICmpInst(*BB0, ICmpInst::ICMP_SGE, PtrVecA, PtrVecB);
 168   EXPECT_NE(ICmp0, ICmp2); // suppress warning.
 169
 170   GetElementPtrInst *Gep0 = GetElementPtrInst::Create(PtrVecA, C2xi32a);
 171   GetElementPtrInst *Gep1 = GetElementPtrInst::Create(PtrVecA, C2xi32b);
 172   GetElementPtrInst *Gep2 = GetElementPtrInst::Create(PtrVecB, C2xi32a);
 173   GetElementPtrInst *Gep3 = GetElementPtrInst::Create(PtrVecB, C2xi32b);
 174
 175   CastInst *BTC0 = new BitCastInst(Gep0, V2xi8PTy);
 176   CastInst *BTC1 = new BitCastInst(Gep1, V2xi8PTy);
 177   CastInst *BTC2 = new BitCastInst(Gep2, V2xi8PTy);
 178   CastInst *BTC3 = new BitCastInst(Gep3, V2xi8PTy);
 179
 180   Value *S0 = BTC0->stripPointerCasts();
 181   Value *S1 = BTC1->stripPointerCasts();
 182   Value *S2 = BTC2->stripPointerCasts();
 183   Value *S3 = BTC3->stripPointerCasts();
 184
 185   EXPECT_NE(S0, Gep0);
 186   EXPECT_NE(S1, Gep1);
 187   EXPECT_NE(S2, Gep2);
 188   EXPECT_NE(S3, Gep3);
 189
 190   int64_t Offset;
 191   DataLayout TD("e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f3"
 192                 "2:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80"
 193                 ":128:128-n8:16:32:64-S128");
 194   // Make sure we don't crash
 195   GetPointerBaseWithConstantOffset(Gep0, Offset, TD);
 196   GetPointerBaseWithConstantOffset(Gep1, Offset, TD);
 197   GetPointerBaseWithConstantOffset(Gep2, Offset, TD);
 198   GetPointerBaseWithConstantOffset(Gep3, Offset, TD);
 199
 200   // Gep of Geps
 201   GetElementPtrInst *GepII0 = GetElementPtrInst::Create(Gep0, C2xi32b);
 202   GetElementPtrInst *GepII1 = GetElementPtrInst::Create(Gep1, C2xi32a);
 203   GetElementPtrInst *GepII2 = GetElementPtrInst::Create(Gep2, C2xi32b);
 204   GetElementPtrInst *GepII3 = GetElementPtrInst::Create(Gep3, C2xi32a);
 205
 206   EXPECT_EQ(GepII0->getNumIndices(), 1u);
 207   EXPECT_EQ(GepII1->getNumIndices(), 1u);
 208   EXPECT_EQ(GepII2->getNumIndices(), 1u);
 209   EXPECT_EQ(GepII3->getNumIndices(), 1u);
 210
 211   EXPECT_FALSE(GepII0->hasAllZeroIndices());
 212   EXPECT_FALSE(GepII1->hasAllZeroIndices());
 213   EXPECT_FALSE(GepII2->hasAllZeroIndices());
 214   EXPECT_FALSE(GepII3->hasAllZeroIndices());
 215
 216   delete GepII0;
 217   delete GepII1;
 218   delete GepII2;
 219   delete GepII3;
 220
 221   delete BTC0;
 222   delete BTC1;
 223   delete BTC2;
 224   delete BTC3;
 225
 226   delete Gep0;
 227   delete Gep1;
 228   delete Gep2;
 229   delete Gep3;
 230
 231   ICmp2->eraseFromParent();
 232   delete BB0;
 233
 234   delete ICmp0;
 235   delete ICmp1;
 236   delete PtrVecA;
 237   delete PtrVecB;
 238 }
 239
 240 TEST(InstructionsTest, FPMathOperator) {
 241   LLVMContext &Context = getGlobalContext();
 242   IRBuilder<> Builder(Context);
 243   MDBuilder MDHelper(Context);
 244   Instruction *I = Builder.CreatePHI(Builder.getDoubleTy(), 0);
 245   MDNode *MD1 = MDHelper.createFPMath(1.0);
 246   Value *V1 = Builder.CreateFAdd(I, I, "", MD1);
 247   EXPECT_TRUE(isa<FPMathOperator>(V1));
 248   FPMathOperator *O1 = cast<FPMathOperator>(V1);
 249   EXPECT_EQ(O1->getFPAccuracy(), 1.0);
 250   delete V1;
 251   delete I;
 252 }
 253
 254
 255 TEST(InstructionsTest, isEliminableCastPair) {
 256   LLVMContext &C(getGlobalContext());
 257
 258   Type* Int32Ty = Type::getInt32Ty(C);
 259   Type* Int64Ty = Type::getInt64Ty(C);
 260   Type* Int64PtrTy = Type::getInt64PtrTy(C);
 261
 262   // Source and destination pointers have same size -> bitcast.
 263   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::PtrToInt,
 264                                            CastInst::IntToPtr,
 265                                            Int64PtrTy, Int64Ty, Int64PtrTy,
 266                                            Int32Ty, 0, Int32Ty),
 267             CastInst::BitCast);
 268
 269   // Source and destination pointers have different sizes -> fail.
 270   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::PtrToInt,
 271                                            CastInst::IntToPtr,
 272                                            Int64PtrTy, Int64Ty, Int64PtrTy,
 273                                            Int32Ty, 0, Int64Ty),
 274             0U);
 275
 276   // Middle pointer big enough -> bitcast.
 277   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
 278                                            CastInst::PtrToInt,
 279                                            Int64Ty, Int64PtrTy, Int64Ty,
 280                                            0, Int64Ty, 0),
 281             CastInst::BitCast);
 282
 283   // Middle pointer too small -> fail.
 284   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
 285                                            CastInst::PtrToInt,
 286                                            Int64Ty, Int64PtrTy, Int64Ty,
 287                                            0, Int32Ty, 0),
 288             0U);
 289 }
 290
 291 }  // end anonymous namespace
 292 }  // end namespace llvm