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llvm-mirror/unittests/IR/PatternMatch.cpp
Sanjay Patel b3121b5992 [PatternMatch] Handle undef vectors consistently 
This patch fixes the issue noticed in D54532. 
The problem is that cst_pred_ty-based matchers like m_Zero() currently do not match 
scalar undefs (as expected), but *do* match vector undefs. This may lead to optimization 
inconsistencies in rare cases.

There is only one existing test for which output changes, reverting the change from D53205. 
The reason here is that vector fsub undef, %x is no longer matched as an m_FNeg(). While I 
think that the new output is technically worse than the previous one, it is consistent with 
scalar, and I don't think it's really important either way (generally that undef should have 
been folded away prior to reassociation.)

I've also added another test case for this issue based on InstructionSimplify. It took some 
effort to find that one, as in most cases undef folds are either checked first -- and in the 
cases where they aren't it usually happens to not make a difference in the end. This is the 
only case I was able to come up with. Prior to this patch the test case simplified to undef 
in the scalar case, but zeroinitializer in the vector case.

Patch by: @nikic (Nikita Popov)

Differential Revision: https://reviews.llvm.org/D54631

llvm-svn: 347318
2018-11-20 16:08:19 +00:00

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//===---- llvm/unittest/IR/PatternMatch.cpp - PatternMatch unit tests ----===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/PatternMatch.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/MDBuilder.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/NoFolder.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/Type.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace llvm::PatternMatch;
namespace {
struct PatternMatchTest : ::testing::Test {
LLVMContext Ctx;
std::unique_ptr<Module> M;
Function *F;
BasicBlock *BB;
IRBuilder<NoFolder> IRB;
PatternMatchTest()
: M(new Module("PatternMatchTestModule", Ctx)),
F(Function::Create(
FunctionType::get(Type::getVoidTy(Ctx), /* IsVarArg */ false),
Function::ExternalLinkage, "f", M.get())),
BB(BasicBlock::Create(Ctx, "entry", F)), IRB(BB) {}
};
TEST_F(PatternMatchTest, OneUse) {
// Build up a little tree of values:
//
// One = (1 + 2) + 42
// Two = One + 42
// Leaf = (Two + 8) + (Two + 13)
Value *One = IRB.CreateAdd(IRB.CreateAdd(IRB.getInt32(1), IRB.getInt32(2)),
IRB.getInt32(42));
Value *Two = IRB.CreateAdd(One, IRB.getInt32(42));
Value *Leaf = IRB.CreateAdd(IRB.CreateAdd(Two, IRB.getInt32(8)),
IRB.CreateAdd(Two, IRB.getInt32(13)));
Value *V;
EXPECT_TRUE(m_OneUse(m_Value(V)).match(One));
EXPECT_EQ(One, V);
EXPECT_FALSE(m_OneUse(m_Value()).match(Two));
EXPECT_FALSE(m_OneUse(m_Value()).match(Leaf));
}
TEST_F(PatternMatchTest, CommutativeDeferredValue) {
Value *X = IRB.getInt32(1);
Value *Y = IRB.getInt32(2);
{
Value *tX = X;
EXPECT_TRUE(match(X, m_Deferred(tX)));
EXPECT_FALSE(match(Y, m_Deferred(tX)));
}
{
const Value *tX = X;
EXPECT_TRUE(match(X, m_Deferred(tX)));
EXPECT_FALSE(match(Y, m_Deferred(tX)));
}
{
Value *const tX = X;
EXPECT_TRUE(match(X, m_Deferred(tX)));
EXPECT_FALSE(match(Y, m_Deferred(tX)));
}
{
const Value *const tX = X;
EXPECT_TRUE(match(X, m_Deferred(tX)));
EXPECT_FALSE(match(Y, m_Deferred(tX)));
}
{
Value *tX = nullptr;
EXPECT_TRUE(match(IRB.CreateAnd(X, X), m_And(m_Value(tX), m_Deferred(tX))));
EXPECT_EQ(tX, X);
}
{
Value *tX = nullptr;
EXPECT_FALSE(
match(IRB.CreateAnd(X, Y), m_c_And(m_Value(tX), m_Deferred(tX))));
}
auto checkMatch = [X, Y](Value *Pattern) {
Value *tX = nullptr, *tY = nullptr;
EXPECT_TRUE(match(
Pattern, m_c_And(m_Value(tX), m_c_And(m_Deferred(tX), m_Value(tY)))));
EXPECT_EQ(tX, X);
EXPECT_EQ(tY, Y);
};
checkMatch(IRB.CreateAnd(X, IRB.CreateAnd(X, Y)));
checkMatch(IRB.CreateAnd(X, IRB.CreateAnd(Y, X)));
checkMatch(IRB.CreateAnd(IRB.CreateAnd(X, Y), X));
checkMatch(IRB.CreateAnd(IRB.CreateAnd(Y, X), X));
}
TEST_F(PatternMatchTest, FloatingPointOrderedMin) {
Type *FltTy = IRB.getFloatTy();
Value *L = ConstantFP::get(FltTy, 1.0);
Value *R = ConstantFP::get(FltTy, 2.0);
Value *MatchL, *MatchR;
// Test OLT.
EXPECT_TRUE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOLT(L, R), L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
// Test OLE.
EXPECT_TRUE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOLE(L, R), L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
// Test no match on OGE.
EXPECT_FALSE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOGE(L, R), L, R)));
// Test no match on OGT.
EXPECT_FALSE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOGT(L, R), L, R)));
// Test inverted selects. Note, that this "inverts" the ordering, e.g.:
// %cmp = fcmp oge L, R
// %min = select %cmp R, L
// Given L == NaN
// the above is expanded to %cmp == false ==> %min = L
// which is true for UnordFMin, not OrdFMin, so test that:
// [OU]GE with inverted select.
EXPECT_FALSE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOGE(L, R), R, L)));
EXPECT_TRUE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpUGE(L, R), R, L)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
// [OU]GT with inverted select.
EXPECT_FALSE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOGT(L, R), R, L)));
EXPECT_TRUE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpUGT(L, R), R, L)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
}
TEST_F(PatternMatchTest, FloatingPointOrderedMax) {
Type *FltTy = IRB.getFloatTy();
Value *L = ConstantFP::get(FltTy, 1.0);
Value *R = ConstantFP::get(FltTy, 2.0);
Value *MatchL, *MatchR;
// Test OGT.
EXPECT_TRUE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOGT(L, R), L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
// Test OGE.
EXPECT_TRUE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOGE(L, R), L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
// Test no match on OLE.
EXPECT_FALSE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOLE(L, R), L, R)));
// Test no match on OLT.
EXPECT_FALSE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOLT(L, R), L, R)));
// Test inverted selects. Note, that this "inverts" the ordering, e.g.:
// %cmp = fcmp ole L, R
// %max = select %cmp, R, L
// Given L == NaN,
// the above is expanded to %cmp == false ==> %max == L
// which is true for UnordFMax, not OrdFMax, so test that:
// [OU]LE with inverted select.
EXPECT_FALSE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOLE(L, R), R, L)));
EXPECT_TRUE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpULE(L, R), R, L)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
// [OUT]LT with inverted select.
EXPECT_FALSE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOLT(L, R), R, L)));
EXPECT_TRUE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpULT(L, R), R, L)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
}
TEST_F(PatternMatchTest, FloatingPointUnorderedMin) {
Type *FltTy = IRB.getFloatTy();
Value *L = ConstantFP::get(FltTy, 1.0);
Value *R = ConstantFP::get(FltTy, 2.0);
Value *MatchL, *MatchR;
// Test ULT.
EXPECT_TRUE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpULT(L, R), L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
// Test ULE.
EXPECT_TRUE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpULE(L, R), L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
// Test no match on UGE.
EXPECT_FALSE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpUGE(L, R), L, R)));
// Test no match on UGT.
EXPECT_FALSE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpUGT(L, R), L, R)));
// Test inverted selects. Note, that this "inverts" the ordering, e.g.:
// %cmp = fcmp uge L, R
// %min = select %cmp R, L
// Given L == NaN
// the above is expanded to %cmp == true ==> %min = R
// which is true for OrdFMin, not UnordFMin, so test that:
// [UO]GE with inverted select.
EXPECT_FALSE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpUGE(L, R), R, L)));
EXPECT_TRUE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOGE(L, R), R, L)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
// [UO]GT with inverted select.
EXPECT_FALSE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpUGT(L, R), R, L)));
EXPECT_TRUE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOGT(L, R), R, L)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
}
TEST_F(PatternMatchTest, FloatingPointUnorderedMax) {
Type *FltTy = IRB.getFloatTy();
Value *L = ConstantFP::get(FltTy, 1.0);
Value *R = ConstantFP::get(FltTy, 2.0);
Value *MatchL, *MatchR;
// Test UGT.
EXPECT_TRUE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpUGT(L, R), L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
// Test UGE.
EXPECT_TRUE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpUGE(L, R), L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
// Test no match on ULE.
EXPECT_FALSE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpULE(L, R), L, R)));
// Test no match on ULT.
EXPECT_FALSE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpULT(L, R), L, R)));
// Test inverted selects. Note, that this "inverts" the ordering, e.g.:
// %cmp = fcmp ule L, R
// %max = select %cmp R, L
// Given L == NaN
// the above is expanded to %cmp == true ==> %max = R
// which is true for OrdFMax, not UnordFMax, so test that:
// [UO]LE with inverted select.
EXPECT_FALSE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpULE(L, R), R, L)));
EXPECT_TRUE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOLE(L, R), R, L)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
// [UO]LT with inverted select.
EXPECT_FALSE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpULT(L, R), R, L)));
EXPECT_TRUE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
.match(IRB.CreateSelect(IRB.CreateFCmpOLT(L, R), R, L)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
}
TEST_F(PatternMatchTest, OverflowingBinOps) {
Value *L = IRB.getInt32(1);
Value *R = IRB.getInt32(2);
Value *MatchL, *MatchR;
EXPECT_TRUE(
m_NSWAdd(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNSWAdd(L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
MatchL = MatchR = nullptr;
EXPECT_TRUE(
m_NSWSub(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNSWSub(L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
MatchL = MatchR = nullptr;
EXPECT_TRUE(
m_NSWMul(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNSWMul(L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
MatchL = MatchR = nullptr;
EXPECT_TRUE(m_NSWShl(m_Value(MatchL), m_Value(MatchR)).match(
IRB.CreateShl(L, R, "", /* NUW */ false, /* NSW */ true)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
EXPECT_TRUE(
m_NUWAdd(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNUWAdd(L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
MatchL = MatchR = nullptr;
EXPECT_TRUE(
m_NUWSub(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNUWSub(L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
MatchL = MatchR = nullptr;
EXPECT_TRUE(
m_NUWMul(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNUWMul(L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
MatchL = MatchR = nullptr;
EXPECT_TRUE(m_NUWShl(m_Value(MatchL), m_Value(MatchR)).match(
IRB.CreateShl(L, R, "", /* NUW */ true, /* NSW */ false)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
EXPECT_FALSE(m_NSWAdd(m_Value(), m_Value()).match(IRB.CreateAdd(L, R)));
EXPECT_FALSE(m_NSWAdd(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
EXPECT_FALSE(m_NSWAdd(m_Value(), m_Value()).match(IRB.CreateNSWSub(L, R)));
EXPECT_FALSE(m_NSWSub(m_Value(), m_Value()).match(IRB.CreateSub(L, R)));
EXPECT_FALSE(m_NSWSub(m_Value(), m_Value()).match(IRB.CreateNUWSub(L, R)));
EXPECT_FALSE(m_NSWSub(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
EXPECT_FALSE(m_NSWMul(m_Value(), m_Value()).match(IRB.CreateMul(L, R)));
EXPECT_FALSE(m_NSWMul(m_Value(), m_Value()).match(IRB.CreateNUWMul(L, R)));
EXPECT_FALSE(m_NSWMul(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
EXPECT_FALSE(m_NSWShl(m_Value(), m_Value()).match(IRB.CreateShl(L, R)));
EXPECT_FALSE(m_NSWShl(m_Value(), m_Value()).match(
IRB.CreateShl(L, R, "", /* NUW */ true, /* NSW */ false)));
EXPECT_FALSE(m_NSWShl(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
EXPECT_FALSE(m_NUWAdd(m_Value(), m_Value()).match(IRB.CreateAdd(L, R)));
EXPECT_FALSE(m_NUWAdd(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
EXPECT_FALSE(m_NUWAdd(m_Value(), m_Value()).match(IRB.CreateNUWSub(L, R)));
EXPECT_FALSE(m_NUWSub(m_Value(), m_Value()).match(IRB.CreateSub(L, R)));
EXPECT_FALSE(m_NUWSub(m_Value(), m_Value()).match(IRB.CreateNSWSub(L, R)));
EXPECT_FALSE(m_NUWSub(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
EXPECT_FALSE(m_NUWMul(m_Value(), m_Value()).match(IRB.CreateMul(L, R)));
EXPECT_FALSE(m_NUWMul(m_Value(), m_Value()).match(IRB.CreateNSWMul(L, R)));
EXPECT_FALSE(m_NUWMul(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
EXPECT_FALSE(m_NUWShl(m_Value(), m_Value()).match(IRB.CreateShl(L, R)));
EXPECT_FALSE(m_NUWShl(m_Value(), m_Value()).match(
IRB.CreateShl(L, R, "", /* NUW */ false, /* NSW */ true)));
EXPECT_FALSE(m_NUWShl(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
}
TEST_F(PatternMatchTest, LoadStoreOps) {
// Create this load/store sequence:
//
// %p = alloca i32*
// %0 = load i32*, i32** %p
// store i32 42, i32* %0
Value *Alloca = IRB.CreateAlloca(IRB.getInt32Ty());
Value *LoadInst = IRB.CreateLoad(Alloca);
Value *FourtyTwo = IRB.getInt32(42);
Value *StoreInst = IRB.CreateStore(FourtyTwo, Alloca);
Value *MatchLoad, *MatchStoreVal, *MatchStorePointer;
EXPECT_TRUE(m_Load(m_Value(MatchLoad)).match(LoadInst));
EXPECT_EQ(Alloca, MatchLoad);
EXPECT_TRUE(m_Load(m_Specific(Alloca)).match(LoadInst));
EXPECT_FALSE(m_Load(m_Value(MatchLoad)).match(Alloca));
EXPECT_TRUE(m_Store(m_Value(MatchStoreVal), m_Value(MatchStorePointer))
.match(StoreInst));
EXPECT_EQ(FourtyTwo, MatchStoreVal);
EXPECT_EQ(Alloca, MatchStorePointer);
EXPECT_FALSE(m_Store(m_Value(MatchStoreVal), m_Value(MatchStorePointer))
.match(Alloca));
EXPECT_TRUE(m_Store(m_SpecificInt(42), m_Specific(Alloca))
.match(StoreInst));
EXPECT_FALSE(m_Store(m_SpecificInt(42), m_Specific(FourtyTwo))
.match(StoreInst));
EXPECT_FALSE(m_Store(m_SpecificInt(43), m_Specific(Alloca))
.match(StoreInst));
}
TEST_F(PatternMatchTest, VectorOps) {
// Build up small tree of vector operations
//
// Val = 0 + 1
// Val2 = Val + 3
// VI1 = insertelement <2 x i8> undef, i8 1, i32 0 = <1, undef>
// VI2 = insertelement <2 x i8> %VI1, i8 %Val2, i8 %Val = <1, 4>
// VI3 = insertelement <2 x i8> %VI1, i8 %Val2, i32 1 = <1, 4>
// VI4 = insertelement <2 x i8> %VI1, i8 2, i8 %Val = <1, 2>
//
// SI1 = shufflevector <2 x i8> %VI1, <2 x i8> undef, zeroinitializer
// SI2 = shufflevector <2 x i8> %VI3, <2 x i8> %VI4, <2 x i8> <i8 0, i8 2>
// SI3 = shufflevector <2 x i8> %VI3, <2 x i8> undef, zeroinitializer
// SI4 = shufflevector <2 x i8> %VI4, <2 x i8> undef, zeroinitializer
//
// SP1 = VectorSplat(2, i8 2)
// SP2 = VectorSplat(2, i8 %Val)
Type *VecTy = VectorType::get(IRB.getInt8Ty(), 2);
Type *i32 = IRB.getInt32Ty();
Type *i32VecTy = VectorType::get(i32, 2);
Value *Val = IRB.CreateAdd(IRB.getInt8(0), IRB.getInt8(1));
Value *Val2 = IRB.CreateAdd(Val, IRB.getInt8(3));
SmallVector<Constant *, 2> VecElemIdxs;
VecElemIdxs.push_back(ConstantInt::get(i32, 0));
VecElemIdxs.push_back(ConstantInt::get(i32, 2));
auto *IdxVec = ConstantVector::get(VecElemIdxs);
Value *UndefVec = UndefValue::get(VecTy);
Value *VI1 = IRB.CreateInsertElement(UndefVec, IRB.getInt8(1), (uint64_t)0);
Value *VI2 = IRB.CreateInsertElement(VI1, Val2, Val);
Value *VI3 = IRB.CreateInsertElement(VI1, Val2, (uint64_t)1);
Value *VI4 = IRB.CreateInsertElement(VI1, IRB.getInt8(2), Val);
Value *EX1 = IRB.CreateExtractElement(VI4, Val);
Value *EX2 = IRB.CreateExtractElement(VI4, (uint64_t)0);
Value *EX3 = IRB.CreateExtractElement(IdxVec, (uint64_t)1);
Value *Zero = ConstantAggregateZero::get(i32VecTy);
Value *SI1 = IRB.CreateShuffleVector(VI1, UndefVec, Zero);
Value *SI2 = IRB.CreateShuffleVector(VI3, VI4, IdxVec);
Value *SI3 = IRB.CreateShuffleVector(VI3, UndefVec, Zero);
Value *SI4 = IRB.CreateShuffleVector(VI4, UndefVec, Zero);
Value *SP1 = IRB.CreateVectorSplat(2, IRB.getInt8(2));
Value *SP2 = IRB.CreateVectorSplat(2, Val);
Value *A = nullptr, *B = nullptr, *C = nullptr;
// Test matching insertelement
EXPECT_TRUE(match(VI1, m_InsertElement(m_Value(), m_Value(), m_Value())));
EXPECT_TRUE(
match(VI1, m_InsertElement(m_Undef(), m_ConstantInt(), m_ConstantInt())));
EXPECT_TRUE(
match(VI1, m_InsertElement(m_Undef(), m_ConstantInt(), m_Zero())));
EXPECT_TRUE(
match(VI1, m_InsertElement(m_Undef(), m_SpecificInt(1), m_Zero())));
EXPECT_TRUE(match(VI2, m_InsertElement(m_Value(), m_Value(), m_Value())));
EXPECT_FALSE(
match(VI2, m_InsertElement(m_Value(), m_Value(), m_ConstantInt())));
EXPECT_FALSE(
match(VI2, m_InsertElement(m_Value(), m_ConstantInt(), m_Value())));
EXPECT_FALSE(match(VI2, m_InsertElement(m_Constant(), m_Value(), m_Value())));
EXPECT_TRUE(match(VI3, m_InsertElement(m_Value(A), m_Value(B), m_Value(C))));
EXPECT_TRUE(A == VI1);
EXPECT_TRUE(B == Val2);
EXPECT_TRUE(isa<ConstantInt>(C));
A = B = C = nullptr; // reset
// Test matching extractelement
EXPECT_TRUE(match(EX1, m_ExtractElement(m_Value(A), m_Value(B))));
EXPECT_TRUE(A == VI4);
EXPECT_TRUE(B == Val);
A = B = C = nullptr; // reset
EXPECT_FALSE(match(EX1, m_ExtractElement(m_Value(), m_ConstantInt())));
EXPECT_TRUE(match(EX2, m_ExtractElement(m_Value(), m_ConstantInt())));
EXPECT_TRUE(match(EX3, m_ExtractElement(m_Constant(), m_ConstantInt())));
// Test matching shufflevector
EXPECT_TRUE(match(SI1, m_ShuffleVector(m_Value(), m_Undef(), m_Zero())));
EXPECT_TRUE(match(SI2, m_ShuffleVector(m_Value(A), m_Value(B), m_Value(C))));
EXPECT_TRUE(A == VI3);
EXPECT_TRUE(B == VI4);
EXPECT_TRUE(C == IdxVec);
A = B = C = nullptr; // reset
// Test matching the vector splat pattern
EXPECT_TRUE(match(
SI1,
m_ShuffleVector(m_InsertElement(m_Undef(), m_SpecificInt(1), m_Zero()),
m_Undef(), m_Zero())));
EXPECT_FALSE(match(
SI3, m_ShuffleVector(m_InsertElement(m_Undef(), m_Value(), m_Zero()),
m_Undef(), m_Zero())));
EXPECT_FALSE(match(
SI4, m_ShuffleVector(m_InsertElement(m_Undef(), m_Value(), m_Zero()),
m_Undef(), m_Zero())));
EXPECT_TRUE(match(
SP1,
m_ShuffleVector(m_InsertElement(m_Undef(), m_SpecificInt(2), m_Zero()),
m_Undef(), m_Zero())));
EXPECT_TRUE(match(
SP2, m_ShuffleVector(m_InsertElement(m_Undef(), m_Value(A), m_Zero()),
m_Undef(), m_Zero())));
EXPECT_TRUE(A == Val);
}
TEST_F(PatternMatchTest, VectorUndefInt) {
Type *ScalarTy = IRB.getInt8Ty();
Type *VectorTy = VectorType::get(ScalarTy, 4);
Constant *ScalarUndef = UndefValue::get(ScalarTy);
Constant *VectorUndef = UndefValue::get(VectorTy);
Constant *ScalarZero = Constant::getNullValue(ScalarTy);
Constant *VectorZero = Constant::getNullValue(VectorTy);
SmallVector<Constant *, 4> Elems;
Elems.push_back(ScalarUndef);
Elems.push_back(ScalarZero);
Elems.push_back(ScalarUndef);
Elems.push_back(ScalarZero);
Constant *VectorZeroUndef = ConstantVector::get(Elems);
EXPECT_TRUE(match(ScalarUndef, m_Undef()));
EXPECT_TRUE(match(VectorUndef, m_Undef()));
EXPECT_FALSE(match(ScalarZero, m_Undef()));
EXPECT_FALSE(match(VectorZero, m_Undef()));
EXPECT_FALSE(match(VectorZeroUndef, m_Undef()));
EXPECT_FALSE(match(ScalarUndef, m_Zero()));
EXPECT_FALSE(match(VectorUndef, m_Zero()));
EXPECT_TRUE(match(ScalarZero, m_Zero()));
EXPECT_TRUE(match(VectorZero, m_Zero()));
EXPECT_TRUE(match(VectorZeroUndef, m_Zero()));
}
TEST_F(PatternMatchTest, VectorUndefFloat) {
Type *ScalarTy = IRB.getFloatTy();
Type *VectorTy = VectorType::get(ScalarTy, 4);
Constant *ScalarUndef = UndefValue::get(ScalarTy);
Constant *VectorUndef = UndefValue::get(VectorTy);
Constant *ScalarZero = Constant::getNullValue(ScalarTy);
Constant *VectorZero = Constant::getNullValue(VectorTy);
SmallVector<Constant *, 4> Elems;
Elems.push_back(ScalarUndef);
Elems.push_back(ScalarZero);
Elems.push_back(ScalarUndef);
Elems.push_back(ScalarZero);
Constant *VectorZeroUndef = ConstantVector::get(Elems);
EXPECT_TRUE(match(ScalarUndef, m_Undef()));
EXPECT_TRUE(match(VectorUndef, m_Undef()));
EXPECT_FALSE(match(ScalarZero, m_Undef()));
EXPECT_FALSE(match(VectorZero, m_Undef()));
EXPECT_FALSE(match(VectorZeroUndef, m_Undef()));
EXPECT_FALSE(match(ScalarUndef, m_AnyZeroFP()));
EXPECT_FALSE(match(VectorUndef, m_AnyZeroFP()));
EXPECT_TRUE(match(ScalarZero, m_AnyZeroFP()));
EXPECT_TRUE(match(VectorZero, m_AnyZeroFP()));
EXPECT_TRUE(match(VectorZeroUndef, m_AnyZeroFP()));
}
template <typename T> struct MutableConstTest : PatternMatchTest { };
typedef ::testing::Types<std::tuple<Value*, Instruction*>,
std::tuple<const Value*, const Instruction *>>
MutableConstTestTypes;
TYPED_TEST_CASE(MutableConstTest, MutableConstTestTypes);
TYPED_TEST(MutableConstTest, ICmp) {
auto &IRB = PatternMatchTest::IRB;
typedef typename std::tuple_element<0, TypeParam>::type ValueType;
typedef typename std::tuple_element<1, TypeParam>::type InstructionType;
Value *L = IRB.getInt32(1);
Value *R = IRB.getInt32(2);
ICmpInst::Predicate Pred = ICmpInst::ICMP_UGT;
ValueType MatchL;
ValueType MatchR;
ICmpInst::Predicate MatchPred;
EXPECT_TRUE(m_ICmp(MatchPred, m_Value(MatchL), m_Value(MatchR))
.match((InstructionType)IRB.CreateICmp(Pred, L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
}
} // anonymous namespace.
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