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2659b307d2
getCompare returns true, false or undef constants if the comparison can be evaluated, or nullptr if it cannot. This is in line with what ConstantExpr::getCompare returns. It also allows us to use ConstantExpr::getCompare for comparing constants. Reviewers: davide, mssimpso, dberlin, anna Reviewed By: davide Differential Revision: https://reviews.llvm.org/D43761 llvm-svn: 326720
175 lines
7.7 KiB
C++
175 lines
7.7 KiB
C++
//===- ValueLatticeTest.cpp - ScalarEvolution unit tests --------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/ValueLattice.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/IR/ConstantRange.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "gtest/gtest.h"
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namespace llvm {
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namespace {
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// We use this fixture to ensure that we clean up ScalarEvolution before
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// deleting the PassManager.
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class ValueLatticeTest : public testing::Test {
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protected:
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LLVMContext Context;
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Module M;
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ValueLatticeTest() : M("", Context) {}
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};
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TEST_F(ValueLatticeTest, ValueLatticeGetters) {
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auto I32Ty = IntegerType::get(Context, 32);
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auto *C1 = ConstantInt::get(I32Ty, 1);
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EXPECT_TRUE(ValueLatticeElement::get(C1).isConstantRange());
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EXPECT_TRUE(
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ValueLatticeElement::getRange({C1->getValue()}).isConstantRange());
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EXPECT_TRUE(ValueLatticeElement::getOverdefined().isOverdefined());
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auto FloatTy = Type::getFloatTy(Context);
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auto *C2 = ConstantFP::get(FloatTy, 1.1);
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EXPECT_TRUE(ValueLatticeElement::get(C2).isConstant());
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EXPECT_TRUE(ValueLatticeElement::getNot(C2).isNotConstant());
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}
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TEST_F(ValueLatticeTest, MergeIn) {
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auto I32Ty = IntegerType::get(Context, 32);
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auto *C1 = ConstantInt::get(I32Ty, 1);
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// Merge to lattice values with equal integer constant.
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auto LV1 = ValueLatticeElement::get(C1);
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LV1.mergeIn(ValueLatticeElement::get(C1), M.getDataLayout());
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EXPECT_TRUE(LV1.isConstantRange());
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EXPECT_EQ(LV1.asConstantInteger().getValue().getLimitedValue(), 1U);
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// Merge LV1 with different integer constant.
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LV1.mergeIn(ValueLatticeElement::get(ConstantInt::get(I32Ty, 99)),
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M.getDataLayout());
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EXPECT_TRUE(LV1.isConstantRange());
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EXPECT_EQ(LV1.getConstantRange().getLower().getLimitedValue(), 1U);
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EXPECT_EQ(LV1.getConstantRange().getUpper().getLimitedValue(), 100U);
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// Merge LV1 in undefined value.
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ValueLatticeElement LV2;
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LV2.mergeIn(LV1, M.getDataLayout());
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EXPECT_TRUE(LV1.isConstantRange());
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EXPECT_EQ(LV1.getConstantRange().getLower().getLimitedValue(), 1U);
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EXPECT_EQ(LV1.getConstantRange().getUpper().getLimitedValue(), 100U);
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EXPECT_TRUE(LV2.isConstantRange());
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EXPECT_EQ(LV2.getConstantRange().getLower().getLimitedValue(), 1U);
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EXPECT_EQ(LV2.getConstantRange().getUpper().getLimitedValue(), 100U);
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// Merge with overdefined.
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LV1.mergeIn(ValueLatticeElement::getOverdefined(), M.getDataLayout());
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EXPECT_TRUE(LV1.isOverdefined());
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}
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TEST_F(ValueLatticeTest, getCompareIntegers) {
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auto *I32Ty = IntegerType::get(Context, 32);
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auto *I1Ty = IntegerType::get(Context, 1);
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auto *C1 = ConstantInt::get(I32Ty, 1);
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auto LV1 = ValueLatticeElement::get(C1);
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// Check getCompare for equal integer constants.
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EXPECT_TRUE(LV1.getCompare(CmpInst::ICMP_EQ, I1Ty, LV1)->isOneValue());
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EXPECT_TRUE(LV1.getCompare(CmpInst::ICMP_SGE, I1Ty, LV1)->isOneValue());
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EXPECT_TRUE(LV1.getCompare(CmpInst::ICMP_SLE, I1Ty, LV1)->isOneValue());
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EXPECT_TRUE(LV1.getCompare(CmpInst::ICMP_NE, I1Ty, LV1)->isZeroValue());
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EXPECT_TRUE(LV1.getCompare(CmpInst::ICMP_SLT, I1Ty, LV1)->isZeroValue());
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EXPECT_TRUE(LV1.getCompare(CmpInst::ICMP_SGT, I1Ty, LV1)->isZeroValue());
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auto LV2 =
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ValueLatticeElement::getRange({APInt(32, 10, true), APInt(32, 20, true)});
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// Check getCompare with distinct integer ranges.
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EXPECT_TRUE(LV1.getCompare(CmpInst::ICMP_SLT, I1Ty, LV2)->isOneValue());
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EXPECT_TRUE(LV1.getCompare(CmpInst::ICMP_SLE, I1Ty, LV2)->isOneValue());
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EXPECT_TRUE(LV1.getCompare(CmpInst::ICMP_NE, I1Ty, LV2)->isOneValue());
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EXPECT_TRUE(LV1.getCompare(CmpInst::ICMP_EQ, I1Ty, LV2)->isZeroValue());
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EXPECT_TRUE(LV1.getCompare(CmpInst::ICMP_SGE, I1Ty, LV2)->isZeroValue());
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EXPECT_TRUE(LV1.getCompare(CmpInst::ICMP_SGT, I1Ty, LV2)->isZeroValue());
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auto LV3 =
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ValueLatticeElement::getRange({APInt(32, 15, true), APInt(32, 19, true)});
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// Check getCompare with a subset integer ranges.
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EXPECT_EQ(LV2.getCompare(CmpInst::ICMP_SLT, I1Ty, LV3), nullptr);
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EXPECT_EQ(LV2.getCompare(CmpInst::ICMP_SLE, I1Ty, LV3), nullptr);
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EXPECT_EQ(LV2.getCompare(CmpInst::ICMP_NE, I1Ty, LV3), nullptr);
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EXPECT_EQ(LV2.getCompare(CmpInst::ICMP_EQ, I1Ty, LV3), nullptr);
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EXPECT_EQ(LV2.getCompare(CmpInst::ICMP_SGE, I1Ty, LV3), nullptr);
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EXPECT_EQ(LV2.getCompare(CmpInst::ICMP_SGT, I1Ty, LV3), nullptr);
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auto LV4 =
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ValueLatticeElement::getRange({APInt(32, 15, true), APInt(32, 25, true)});
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// Check getCompare with overlapping integer ranges.
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EXPECT_EQ(LV3.getCompare(CmpInst::ICMP_SLT, I1Ty, LV4), nullptr);
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EXPECT_EQ(LV3.getCompare(CmpInst::ICMP_SLE, I1Ty, LV4), nullptr);
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EXPECT_EQ(LV3.getCompare(CmpInst::ICMP_NE, I1Ty, LV4), nullptr);
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EXPECT_EQ(LV3.getCompare(CmpInst::ICMP_EQ, I1Ty, LV4), nullptr);
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EXPECT_EQ(LV3.getCompare(CmpInst::ICMP_SGE, I1Ty, LV4), nullptr);
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EXPECT_EQ(LV3.getCompare(CmpInst::ICMP_SGT, I1Ty, LV4), nullptr);
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}
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TEST_F(ValueLatticeTest, getCompareFloat) {
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auto *FloatTy = IntegerType::getFloatTy(Context);
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auto *I1Ty = IntegerType::get(Context, 1);
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auto *C1 = ConstantFP::get(FloatTy, 1.0);
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auto LV1 = ValueLatticeElement::get(C1);
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auto LV2 = ValueLatticeElement::get(C1);
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// Check getCompare for equal floating point constants.
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EXPECT_TRUE(LV1.getCompare(CmpInst::FCMP_OEQ, I1Ty, LV2)->isOneValue());
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EXPECT_TRUE(LV1.getCompare(CmpInst::FCMP_OGE, I1Ty, LV2)->isOneValue());
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EXPECT_TRUE(LV1.getCompare(CmpInst::FCMP_OLE, I1Ty, LV2)->isOneValue());
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EXPECT_TRUE(LV1.getCompare(CmpInst::FCMP_ONE, I1Ty, LV2)->isZeroValue());
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EXPECT_TRUE(LV1.getCompare(CmpInst::FCMP_OLT, I1Ty, LV2)->isZeroValue());
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EXPECT_TRUE(LV1.getCompare(CmpInst::FCMP_OGT, I1Ty, LV2)->isZeroValue());
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LV1.mergeIn(ValueLatticeElement::get(ConstantFP::get(FloatTy, 2.2)),
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M.getDataLayout());
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EXPECT_EQ(LV1.getCompare(CmpInst::FCMP_OEQ, I1Ty, LV2), nullptr);
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EXPECT_EQ(LV1.getCompare(CmpInst::FCMP_OGE, I1Ty, LV2), nullptr);
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EXPECT_EQ(LV1.getCompare(CmpInst::FCMP_OLE, I1Ty, LV2), nullptr);
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EXPECT_EQ(LV1.getCompare(CmpInst::FCMP_ONE, I1Ty, LV2), nullptr);
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EXPECT_EQ(LV1.getCompare(CmpInst::FCMP_OLT, I1Ty, LV2), nullptr);
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EXPECT_EQ(LV1.getCompare(CmpInst::FCMP_OGT, I1Ty, LV2), nullptr);
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}
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TEST_F(ValueLatticeTest, getCompareUndef) {
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auto *I32Ty = IntegerType::get(Context, 32);
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auto *I1Ty = IntegerType::get(Context, 1);
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auto LV1 = ValueLatticeElement::get(UndefValue::get(I32Ty));
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auto LV2 =
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ValueLatticeElement::getRange({APInt(32, 10, true), APInt(32, 20, true)});
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EXPECT_TRUE(isa<UndefValue>(LV1.getCompare(CmpInst::ICMP_SLT, I1Ty, LV2)));
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EXPECT_TRUE(isa<UndefValue>(LV1.getCompare(CmpInst::ICMP_SLE, I1Ty, LV2)));
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EXPECT_TRUE(isa<UndefValue>(LV1.getCompare(CmpInst::ICMP_NE, I1Ty, LV2)));
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EXPECT_TRUE(isa<UndefValue>(LV1.getCompare(CmpInst::ICMP_EQ, I1Ty, LV2)));
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EXPECT_TRUE(isa<UndefValue>(LV1.getCompare(CmpInst::ICMP_SGE, I1Ty, LV2)));
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EXPECT_TRUE(isa<UndefValue>(LV1.getCompare(CmpInst::ICMP_SGT, I1Ty, LV2)));
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auto *FloatTy = IntegerType::getFloatTy(Context);
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auto LV3 = ValueLatticeElement::get(ConstantFP::get(FloatTy, 1.0));
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EXPECT_TRUE(isa<UndefValue>(LV1.getCompare(CmpInst::FCMP_OEQ, I1Ty, LV3)));
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EXPECT_TRUE(isa<UndefValue>(LV1.getCompare(CmpInst::FCMP_OGE, I1Ty, LV3)));
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EXPECT_TRUE(isa<UndefValue>(LV1.getCompare(CmpInst::FCMP_OLE, I1Ty, LV3)));
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EXPECT_TRUE(isa<UndefValue>(LV1.getCompare(CmpInst::FCMP_ONE, I1Ty, LV3)));
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EXPECT_TRUE(isa<UndefValue>(LV1.getCompare(CmpInst::FCMP_OLT, I1Ty, LV3)));
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EXPECT_TRUE(isa<UndefValue>(LV1.getCompare(CmpInst::FCMP_OGT, I1Ty, LV3)));
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}
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} // end anonymous namespace
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} // end namespace llvm
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