| //===- VectorUtilsTest.cpp - VectorUtils tests ------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Analysis/VectorUtils.h" |
| #include "llvm/Analysis/ValueTracking.h" |
| #include "llvm/AsmParser/Parser.h" |
| #include "llvm/IR/Function.h" |
| #include "llvm/IR/InstIterator.h" |
| #include "llvm/IR/IRBuilder.h" |
| #include "llvm/IR/LLVMContext.h" |
| #include "llvm/IR/Module.h" |
| #include "llvm/IR/NoFolder.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/SourceMgr.h" |
| #include "llvm/Support/KnownBits.h" |
| #include "gtest/gtest.h" |
| |
| using namespace llvm; |
| |
| namespace { |
| |
| class VectorUtilsTest : public testing::Test { |
| protected: |
| void parseAssembly(const char *Assembly) { |
| SMDiagnostic Error; |
| M = parseAssemblyString(Assembly, Error, Context); |
| |
| std::string errMsg; |
| raw_string_ostream os(errMsg); |
| Error.print("", os); |
| |
| // A failure here means that the test itself is buggy. |
| if (!M) |
| report_fatal_error(os.str()); |
| |
| Function *F = M->getFunction("test"); |
| if (F == nullptr) |
| report_fatal_error("Test must have a function named @test"); |
| |
| A = nullptr; |
| for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I) { |
| if (I->hasName()) { |
| if (I->getName() == "A") |
| A = &*I; |
| } |
| } |
| if (A == nullptr) |
| report_fatal_error("@test must have an instruction %A"); |
| } |
| |
| LLVMContext Context; |
| std::unique_ptr<Module> M; |
| Instruction *A; |
| }; |
| |
| struct BasicTest : public testing::Test { |
| LLVMContext Ctx; |
| std::unique_ptr<Module> M; |
| Function *F; |
| BasicBlock *BB; |
| IRBuilder<NoFolder> IRB; |
| |
| BasicTest() |
| : M(new Module("VectorUtils", Ctx)), |
| F(Function::Create( |
| FunctionType::get(Type::getVoidTy(Ctx), /* IsVarArg */ false), |
| Function::ExternalLinkage, "f", M.get())), |
| BB(BasicBlock::Create(Ctx, "entry", F)), IRB(BB) {} |
| }; |
| |
| |
| } // namespace |
| |
| TEST_F(BasicTest, isSplat) { |
| Value *UndefVec = UndefValue::get(VectorType::get(IRB.getInt8Ty(), 4)); |
| EXPECT_TRUE(isSplatValue(UndefVec)); |
| |
| Constant *UndefScalar = UndefValue::get(IRB.getInt8Ty()); |
| EXPECT_FALSE(isSplatValue(UndefScalar)); |
| |
| Constant *ScalarC = IRB.getInt8(42); |
| EXPECT_FALSE(isSplatValue(ScalarC)); |
| |
| Constant *OtherScalarC = IRB.getInt8(-42); |
| Constant *NonSplatC = ConstantVector::get({ScalarC, OtherScalarC}); |
| EXPECT_FALSE(isSplatValue(NonSplatC)); |
| |
| Value *SplatC = IRB.CreateVectorSplat(5, ScalarC); |
| EXPECT_TRUE(isSplatValue(SplatC)); |
| |
| // FIXME: Constant splat analysis does not allow undef elements. |
| Constant *SplatWithUndefC = ConstantVector::get({ScalarC, UndefScalar}); |
| EXPECT_FALSE(isSplatValue(SplatWithUndefC)); |
| } |
| |
| TEST_F(VectorUtilsTest, isSplatValue_00) { |
| parseAssembly( |
| "define <2 x i8> @test(<2 x i8> %x) {\n" |
| " %A = shufflevector <2 x i8> %x, <2 x i8> undef, <2 x i32> zeroinitializer\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_TRUE(isSplatValue(A)); |
| } |
| |
| TEST_F(VectorUtilsTest, isSplatValue_11) { |
| parseAssembly( |
| "define <2 x i8> @test(<2 x i8> %x) {\n" |
| " %A = shufflevector <2 x i8> %x, <2 x i8> undef, <2 x i32> <i32 1, i32 1>\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_TRUE(isSplatValue(A)); |
| } |
| |
| TEST_F(VectorUtilsTest, isSplatValue_01) { |
| parseAssembly( |
| "define <2 x i8> @test(<2 x i8> %x) {\n" |
| " %A = shufflevector <2 x i8> %x, <2 x i8> undef, <2 x i32> <i32 0, i32 1>\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_FALSE(isSplatValue(A)); |
| } |
| |
| // FIXME: Constant (mask) splat analysis does not allow undef elements. |
| |
| TEST_F(VectorUtilsTest, isSplatValue_0u) { |
| parseAssembly( |
| "define <2 x i8> @test(<2 x i8> %x) {\n" |
| " %A = shufflevector <2 x i8> %x, <2 x i8> undef, <2 x i32> <i32 0, i32 undef>\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_FALSE(isSplatValue(A)); |
| } |
| |
| TEST_F(VectorUtilsTest, isSplatValue_Binop) { |
| parseAssembly( |
| "define <2 x i8> @test(<2 x i8> %x) {\n" |
| " %v0 = shufflevector <2 x i8> %x, <2 x i8> undef, <2 x i32> <i32 0, i32 0>\n" |
| " %v1 = shufflevector <2 x i8> %x, <2 x i8> undef, <2 x i32> <i32 1, i32 1>\n" |
| " %A = udiv <2 x i8> %v0, %v1\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_TRUE(isSplatValue(A)); |
| } |
| |
| TEST_F(VectorUtilsTest, isSplatValue_Binop_ConstantOp0) { |
| parseAssembly( |
| "define <2 x i8> @test(<2 x i8> %x) {\n" |
| " %v1 = shufflevector <2 x i8> %x, <2 x i8> undef, <2 x i32> <i32 1, i32 1>\n" |
| " %A = ashr <2 x i8> <i8 42, i8 42>, %v1\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_TRUE(isSplatValue(A)); |
| } |
| |
| TEST_F(VectorUtilsTest, isSplatValue_Binop_Not_Op0) { |
| parseAssembly( |
| "define <2 x i8> @test(<2 x i8> %x) {\n" |
| " %v0 = shufflevector <2 x i8> %x, <2 x i8> undef, <2 x i32> <i32 1, i32 0>\n" |
| " %v1 = shufflevector <2 x i8> %x, <2 x i8> undef, <2 x i32> <i32 1, i32 1>\n" |
| " %A = add <2 x i8> %v0, %v1\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_FALSE(isSplatValue(A)); |
| } |
| |
| TEST_F(VectorUtilsTest, isSplatValue_Binop_Not_Op1) { |
| parseAssembly( |
| "define <2 x i8> @test(<2 x i8> %x) {\n" |
| " %v0 = shufflevector <2 x i8> %x, <2 x i8> undef, <2 x i32> <i32 1, i32 1>\n" |
| " %v1 = shufflevector <2 x i8> %x, <2 x i8> undef, <2 x i32> <i32 0, i32 1>\n" |
| " %A = shl <2 x i8> %v0, %v1\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_FALSE(isSplatValue(A)); |
| } |
| |
| TEST_F(VectorUtilsTest, isSplatValue_Select) { |
| parseAssembly( |
| "define <2 x i8> @test(<2 x i1> %x, <2 x i8> %y, <2 x i8> %z) {\n" |
| " %v0 = shufflevector <2 x i1> %x, <2 x i1> undef, <2 x i32> <i32 1, i32 1>\n" |
| " %v1 = shufflevector <2 x i8> %y, <2 x i8> undef, <2 x i32> <i32 0, i32 0>\n" |
| " %v2 = shufflevector <2 x i8> %z, <2 x i8> undef, <2 x i32> <i32 1, i32 1>\n" |
| " %A = select <2 x i1> %v0, <2 x i8> %v1, <2 x i8> %v2\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_TRUE(isSplatValue(A)); |
| } |
| |
| TEST_F(VectorUtilsTest, isSplatValue_Select_ConstantOp) { |
| parseAssembly( |
| "define <2 x i8> @test(<2 x i1> %x, <2 x i8> %y, <2 x i8> %z) {\n" |
| " %v0 = shufflevector <2 x i1> %x, <2 x i1> undef, <2 x i32> <i32 1, i32 1>\n" |
| " %v2 = shufflevector <2 x i8> %z, <2 x i8> undef, <2 x i32> <i32 1, i32 1>\n" |
| " %A = select <2 x i1> %v0, <2 x i8> <i8 42, i8 42>, <2 x i8> %v2\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_TRUE(isSplatValue(A)); |
| } |
| |
| TEST_F(VectorUtilsTest, isSplatValue_Select_NotCond) { |
| parseAssembly( |
| "define <2 x i8> @test(<2 x i1> %x, <2 x i8> %y, <2 x i8> %z) {\n" |
| " %v1 = shufflevector <2 x i8> %y, <2 x i8> undef, <2 x i32> <i32 0, i32 0>\n" |
| " %v2 = shufflevector <2 x i8> %z, <2 x i8> undef, <2 x i32> <i32 1, i32 1>\n" |
| " %A = select <2 x i1> %x, <2 x i8> %v1, <2 x i8> %v2\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_FALSE(isSplatValue(A)); |
| } |
| |
| TEST_F(VectorUtilsTest, isSplatValue_Select_NotOp1) { |
| parseAssembly( |
| "define <2 x i8> @test(<2 x i1> %x, <2 x i8> %y, <2 x i8> %z) {\n" |
| " %v0 = shufflevector <2 x i1> %x, <2 x i1> undef, <2 x i32> <i32 1, i32 1>\n" |
| " %v2 = shufflevector <2 x i8> %z, <2 x i8> undef, <2 x i32> <i32 1, i32 1>\n" |
| " %A = select <2 x i1> %v0, <2 x i8> %y, <2 x i8> %v2\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_FALSE(isSplatValue(A)); |
| } |
| |
| TEST_F(VectorUtilsTest, isSplatValue_Select_NotOp2) { |
| parseAssembly( |
| "define <2 x i8> @test(<2 x i1> %x, <2 x i8> %y, <2 x i8> %z) {\n" |
| " %v0 = shufflevector <2 x i1> %x, <2 x i1> undef, <2 x i32> <i32 1, i32 1>\n" |
| " %v1 = shufflevector <2 x i8> %y, <2 x i8> undef, <2 x i32> <i32 0, i32 0>\n" |
| " %A = select <2 x i1> %v0, <2 x i8> %v1, <2 x i8> %z\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_FALSE(isSplatValue(A)); |
| } |
| |
| TEST_F(VectorUtilsTest, isSplatValue_SelectBinop) { |
| parseAssembly( |
| "define <2 x i8> @test(<2 x i1> %x, <2 x i8> %y, <2 x i8> %z) {\n" |
| " %v0 = shufflevector <2 x i1> %x, <2 x i1> undef, <2 x i32> <i32 1, i32 1>\n" |
| " %v1 = shufflevector <2 x i8> %y, <2 x i8> undef, <2 x i32> <i32 0, i32 0>\n" |
| " %v2 = shufflevector <2 x i8> %z, <2 x i8> undef, <2 x i32> <i32 1, i32 1>\n" |
| " %bo = xor <2 x i8> %v1, %v2\n" |
| " %A = select <2 x i1> %v0, <2 x i8> %bo, <2 x i8> %v2\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_TRUE(isSplatValue(A)); |
| } |
| |
| TEST_F(VectorUtilsTest, getSplatValueElt0) { |
| parseAssembly( |
| "define <2 x i8> @test(i8 %x) {\n" |
| " %ins = insertelement <2 x i8> undef, i8 %x, i32 0\n" |
| " %A = shufflevector <2 x i8> %ins, <2 x i8> undef, <2 x i32> zeroinitializer\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_EQ(getSplatValue(A)->getName(), "x"); |
| } |
| |
| TEST_F(VectorUtilsTest, getSplatValueEltMismatch) { |
| parseAssembly( |
| "define <2 x i8> @test(i8 %x) {\n" |
| " %ins = insertelement <2 x i8> undef, i8 %x, i32 1\n" |
| " %A = shufflevector <2 x i8> %ins, <2 x i8> undef, <2 x i32> zeroinitializer\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_EQ(getSplatValue(A), nullptr); |
| } |
| |
| // TODO: This is a splat, but we don't recognize it. |
| |
| TEST_F(VectorUtilsTest, getSplatValueElt1) { |
| parseAssembly( |
| "define <2 x i8> @test(i8 %x) {\n" |
| " %ins = insertelement <2 x i8> undef, i8 %x, i32 1\n" |
| " %A = shufflevector <2 x i8> %ins, <2 x i8> undef, <2 x i32> <i32 1, i32 1>\n" |
| " ret <2 x i8> %A\n" |
| "}\n"); |
| EXPECT_EQ(getSplatValue(A), nullptr); |
| } |