llvm/unittests/AsmParser/AsmParserTest.cpp - llvm-project - Git at Google

 //===- llvm/unittest/AsmParser/AsmParserTest.cpp - asm parser unittests ---===//
 //
 // 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/ADT/StringRef.h"
 #include "llvm/AsmParser/Parser.h"
 #include "llvm/AsmParser/SlotMapping.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/IR/DebugInfoMetadata.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
 #include "llvm/Support/Error.h"
 #include "llvm/Support/SourceMgr.h"
 #include "gtest/gtest.h"

 using namespace llvm;

 namespace {

 TEST(AsmParserTest, NullTerminatedInput) {
   LLVMContext Ctx;
   StringRef Source = "; Empty module \n";
   SMDiagnostic Error;
   auto Mod = parseAssemblyString(Source, Error, Ctx);

   EXPECT_TRUE(Mod != nullptr);
   EXPECT_TRUE(Error.getMessage().empty());
 }

 #ifdef GTEST_HAS_DEATH_TEST
 #ifndef NDEBUG

 TEST(AsmParserTest, NonNullTerminatedInput) {
   LLVMContext Ctx;
   StringRef Source = "; Empty module \n\1\2";
   SMDiagnostic Error;
   std::unique_ptr<Module> Mod;
   EXPECT_DEATH(Mod = parseAssemblyString(Source.substr(0, Source.size() - 2),
                                          Error, Ctx),
                "Buffer is not null terminated!");
 }

 #endif
 #endif

 TEST(AsmParserTest, SlotMappingTest) {
   LLVMContext Ctx;
   StringRef Source = "@0 = global i32 0\n !0 = !{}\n !42 = !{i32 42}";
   SMDiagnostic Error;
   SlotMapping Mapping;
   auto Mod = parseAssemblyString(Source, Error, Ctx, &Mapping);

   EXPECT_TRUE(Mod != nullptr);
   EXPECT_TRUE(Error.getMessage().empty());

   ASSERT_EQ(Mapping.GlobalValues.getNext(), 1u);
   EXPECT_TRUE(isa<GlobalVariable>(Mapping.GlobalValues.get(0)));

   EXPECT_EQ(Mapping.MetadataNodes.size(), 2u);
   EXPECT_EQ(Mapping.MetadataNodes.count(0), 1u);
   EXPECT_EQ(Mapping.MetadataNodes.count(42), 1u);
   EXPECT_EQ(Mapping.MetadataNodes.count(1), 0u);
 }

 TEST(AsmParserTest, TypeAndConstantValueParsing) {
   LLVMContext Ctx;
   SMDiagnostic Error;
   StringRef Source = "define void @test() {\n  entry:\n  ret void\n}";
   auto Mod = parseAssemblyString(Source, Error, Ctx);
   ASSERT_TRUE(Mod != nullptr);
   auto &M = *Mod;

   const Value *V;
   V = parseConstantValue("double 3.5", Error, M);
   ASSERT_TRUE(V);
   EXPECT_TRUE(V->getType()->isDoubleTy());
   ASSERT_TRUE(isa<ConstantFP>(V));
   EXPECT_TRUE(cast<ConstantFP>(V)->isExactlyValue(3.5));

   V = parseConstantValue("i32 42", Error, M);
   ASSERT_TRUE(V);
   EXPECT_TRUE(V->getType()->isIntegerTy());
   ASSERT_TRUE(isa<ConstantInt>(V));
   EXPECT_TRUE(cast<ConstantInt>(V)->equalsInt(42));

   V = parseConstantValue("<4 x i32> <i32 0, i32 1, i32 2, i32 3>", Error, M);
   ASSERT_TRUE(V);
   EXPECT_TRUE(V->getType()->isVectorTy());
   ASSERT_TRUE(isa<ConstantDataVector>(V));

   V = parseConstantValue("<4 x i32> splat (i32 -2)", Error, M);
   ASSERT_TRUE(V);
   EXPECT_TRUE(V->getType()->isVectorTy());
   ASSERT_TRUE(isa<ConstantDataVector>(V));

   V = parseConstantValue("<4 x i32> zeroinitializer", Error, M);
   ASSERT_TRUE(V);
   EXPECT_TRUE(V->getType()->isVectorTy());
   ASSERT_TRUE(isa<Constant>(V));
   EXPECT_TRUE(cast<Constant>(V)->isNullValue());

   V = parseConstantValue("<4 x i32> poison", Error, M);
   ASSERT_TRUE(V);
   EXPECT_TRUE(V->getType()->isVectorTy());
   ASSERT_TRUE(isa<PoisonValue>(V));

   V = parseConstantValue("i32 add (i32 1, i32 2)", Error, M);
   ASSERT_TRUE(V);
   ASSERT_TRUE(isa<ConstantInt>(V));

   V = parseConstantValue("ptr blockaddress(@test, %entry)", Error, M);
   ASSERT_TRUE(V);
   ASSERT_TRUE(isa<BlockAddress>(V));

   V = parseConstantValue("ptr undef", Error, M);
   ASSERT_TRUE(V);
   ASSERT_TRUE(isa<UndefValue>(V));

   V = parseConstantValue("ptr poison", Error, M);
   ASSERT_TRUE(V);
   ASSERT_TRUE(isa<PoisonValue>(V));

   EXPECT_FALSE(parseConstantValue("duble 3.25", Error, M));
   EXPECT_EQ(Error.getMessage(), "expected type");

   EXPECT_FALSE(parseConstantValue("i32 3.25", Error, M));
   EXPECT_EQ(Error.getMessage(), "floating point constant invalid for type");

   EXPECT_FALSE(parseConstantValue("ptr @foo", Error, M));
   EXPECT_EQ(Error.getMessage(), "expected a constant value");

   EXPECT_FALSE(parseConstantValue("i32 3, ", Error, M));
   EXPECT_EQ(Error.getMessage(), "expected end of string");
 }

 TEST(AsmParserTest, TypeAndConstantValueWithSlotMappingParsing) {
   LLVMContext Ctx;
   SMDiagnostic Error;
   StringRef Source =
       "%st = type { i32, i32 }\n"
       "@v = common global [50 x %st] zeroinitializer, align 16\n"
       "%0 = type { i32, i32, i32, i32 }\n"
       "@g = common global [50 x %0] zeroinitializer, align 16\n"
       "define void @marker4(i64 %d) {\n"
       "entry:\n"
       "  %conv = trunc i64 %d to i32\n"
       "  store i32 %conv, ptr getelementptr inbounds "
       "    ([50 x %st], ptr @v, i64 0, i64 1, i32 0), align 16\n"
       "  store i32 %conv, ptr getelementptr inbounds "
       "    ([50 x %0], ptr @g, i64 0, i64 1, i32 0), align 16\n"
       "  ret void\n"
       "}";
   SlotMapping Mapping;
   auto Mod = parseAssemblyString(Source, Error, Ctx, &Mapping);
   ASSERT_TRUE(Mod != nullptr);
   auto &M = *Mod;

   const Value *V;
   V = parseConstantValue("ptr getelementptr inbounds ([50 x %st], ptr "
                          "@v, i64 0, i64 1, i32 0)",
                          Error, M, &Mapping);
   ASSERT_TRUE(V);
   ASSERT_TRUE(isa<ConstantExpr>(V));

   V = parseConstantValue("ptr getelementptr inbounds ([50 x %0], ptr "
                          "@g, i64 0, i64 1, i32 0)",
                          Error, M, &Mapping);
   ASSERT_TRUE(V);
   ASSERT_TRUE(isa<ConstantExpr>(V));
 }

 TEST(AsmParserTest, TypeWithSlotMappingParsing) {
   LLVMContext Ctx;
   SMDiagnostic Error;
   StringRef Source =
       "%st = type { i32, i32 }\n"
       "@v = common global [50 x %st] zeroinitializer, align 16\n"
       "%0 = type { i32, i32, i32, i32 }\n"
       "@g = common global [50 x %0] zeroinitializer, align 16\n"
       "define void @marker4(i64 %d) {\n"
       "entry:\n"
       "  %conv = trunc i64 %d to i32\n"
       "  store i32 %conv, ptr getelementptr inbounds "
       "    ([50 x %st], ptr @v, i64 0, i64 0, i32 0), align 16\n"
       "  store i32 %conv, ptr getelementptr inbounds "
       "    ([50 x %0], ptr @g, i64 0, i64 0, i32 0), align 16\n"
       "  ret void\n"
       "}";
   SlotMapping Mapping;
   auto Mod = parseAssemblyString(Source, Error, Ctx, &Mapping);
   ASSERT_TRUE(Mod != nullptr);
   auto &M = *Mod;

   // Check we properly parse integer types.
   Type *Ty;
   Ty = parseType("i32", Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isIntegerTy());
   ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);

   // Check we properly parse integer types with exotic size.
   Ty = parseType("i13", Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isIntegerTy());
   ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 13);

   // Check we properly parse floating point types.
   Ty = parseType("float", Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isFloatTy());

   Ty = parseType("double", Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isDoubleTy());

   // Check we properly parse struct types.
   // Named struct.
   Ty = parseType("%st", Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isStructTy());

   // Check the details of the struct.
   StructType *ST = cast<StructType>(Ty);
   ASSERT_TRUE(ST->getNumElements() == 2);
   for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i) {
     Ty = ST->getElementType(i);
     ASSERT_TRUE(Ty->isIntegerTy());
     ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);
   }

   // Anonymous struct.
   Ty = parseType("%0", Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isStructTy());

   // Check the details of the struct.
   ST = cast<StructType>(Ty);
   ASSERT_TRUE(ST->getNumElements() == 4);
   for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i) {
     Ty = ST->getElementType(i);
     ASSERT_TRUE(Ty->isIntegerTy());
     ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);
   }

   // Check we properly parse vector types.
   Ty = parseType("<5 x i32>", Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isVectorTy());

   // Check the details of the vector.
   auto *VT = cast<FixedVectorType>(Ty);
   ASSERT_TRUE(VT->getNumElements() == 5);
   ASSERT_TRUE(VT->getPrimitiveSizeInBits().getFixedValue() == 160);
   Ty = VT->getElementType();
   ASSERT_TRUE(Ty->isIntegerTy());
   ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);

   // Opaque struct.
   Ty = parseType("%opaque", Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isStructTy());

   ST = cast<StructType>(Ty);
   ASSERT_TRUE(ST->isOpaque());

   // Check we properly parse pointer types.
   Ty = parseType("ptr", Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isPointerTy());

   // Check that we reject types with garbage.
   Ty = parseType("i32 garbage", Error, M, &Mapping);
   ASSERT_TRUE(!Ty);
 }

 TEST(AsmParserTest, TypeAtBeginningWithSlotMappingParsing) {
   LLVMContext Ctx;
   SMDiagnostic Error;
   StringRef Source =
       "%st = type { i32, i32 }\n"
       "@v = common global [50 x %st] zeroinitializer, align 16\n"
       "%0 = type { i32, i32, i32, i32 }\n"
       "@g = common global [50 x %0] zeroinitializer, align 16\n"
       "define void @marker4(i64 %d) {\n"
       "entry:\n"
       "  %conv = trunc i64 %d to i32\n"
       "  store i32 %conv, ptr getelementptr inbounds "
       "    ([50 x %st], ptr @v, i64 0, i64 0, i32 0), align 16\n"
       "  store i32 %conv, ptr getelementptr inbounds "
       "    ([50 x %0], ptr @g, i64 0, i64 0, i32 0), align 16\n"
       "  ret void\n"
       "}";
   SlotMapping Mapping;
   auto Mod = parseAssemblyString(Source, Error, Ctx, &Mapping);
   ASSERT_TRUE(Mod != nullptr);
   auto &M = *Mod;
   unsigned Read;

   // Check we properly parse integer types.
   Type *Ty;
   Ty = parseTypeAtBeginning("i32", Read, Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isIntegerTy());
   ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);
   ASSERT_TRUE(Read == 3);

   // Check we properly parse integer types with exotic size.
   Ty = parseTypeAtBeginning("i13", Read, Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isIntegerTy());
   ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 13);
   ASSERT_TRUE(Read == 3);

   // Check we properly parse floating point types.
   Ty = parseTypeAtBeginning("float", Read, Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isFloatTy());
   ASSERT_TRUE(Read == 5);

   Ty = parseTypeAtBeginning("double", Read, Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isDoubleTy());
   ASSERT_TRUE(Read == 6);

   // Check we properly parse struct types.
   // Named struct.
   Ty = parseTypeAtBeginning("%st", Read, Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isStructTy());
   ASSERT_TRUE(Read == 3);

   // Check the details of the struct.
   StructType *ST = cast<StructType>(Ty);
   ASSERT_TRUE(ST->getNumElements() == 2);
   for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i) {
     Ty = ST->getElementType(i);
     ASSERT_TRUE(Ty->isIntegerTy());
     ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);
   }

   // Anonymous struct.
   Ty = parseTypeAtBeginning("%0", Read, Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isStructTy());
   ASSERT_TRUE(Read == 2);

   // Check the details of the struct.
   ST = cast<StructType>(Ty);
   ASSERT_TRUE(ST->getNumElements() == 4);
   for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i) {
     Ty = ST->getElementType(i);
     ASSERT_TRUE(Ty->isIntegerTy());
     ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);
   }

   // Check we properly parse vector types.
   Ty = parseTypeAtBeginning("<5 x i32>", Read, Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isVectorTy());
   ASSERT_TRUE(Read == 9);

   // Check the details of the vector.
   auto *VT = cast<FixedVectorType>(Ty);
   ASSERT_TRUE(VT->getNumElements() == 5);
   ASSERT_TRUE(VT->getPrimitiveSizeInBits().getFixedValue() == 160);
   Ty = VT->getElementType();
   ASSERT_TRUE(Ty->isIntegerTy());
   ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);

   // Opaque struct.
   Ty = parseTypeAtBeginning("%opaque", Read, Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isStructTy());
   ASSERT_TRUE(Read == 7);

   ST = cast<StructType>(Ty);
   ASSERT_TRUE(ST->isOpaque());

   // Check we properly parse pointer types.
   // One indirection.
   Ty = parseTypeAtBeginning("ptr", Read, Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isPointerTy());
   ASSERT_TRUE(Read == 3);

   // Check that we reject types with garbage.
   Ty = parseTypeAtBeginning("i32 garbage", Read, Error, M, &Mapping);
   ASSERT_TRUE(Ty);
   ASSERT_TRUE(Ty->isIntegerTy());
   ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);
   // We go to the next token, i.e., we read "i32" + ' '.
   ASSERT_TRUE(Read == 4);
 }

 TEST(AsmParserTest, InvalidDataLayoutStringCallback) {
   LLVMContext Ctx;
   SMDiagnostic Error;
   // Note the invalid i8:7 part
   // Overalign i32 as marker so we can check that indeed this DL was used,
   // and not some default.
   StringRef InvalidDLStr =
       "e-m:e-p:64:64-i8:7-i16:16-i32:64-i64:64-f80:128-n8:16:32:64";
   StringRef FixedDLStr =
       "e-m:e-p:64:64-i8:8-i16:16-i32:64-i64:64-f80:128-n8:16:32:64";
   Expected<DataLayout> ExpectedFixedDL = DataLayout::parse(FixedDLStr);
   ASSERT_TRUE(!ExpectedFixedDL.takeError());
   DataLayout FixedDL = ExpectedFixedDL.get();
   std::string Source = ("target datalayout = \"" + InvalidDLStr + "\"\n").str();
   MemoryBufferRef SourceBuffer(Source, "<string>");

   // Check that we reject the source without a DL override.
   SlotMapping Mapping1;
   auto Mod1 = parseAssembly(SourceBuffer, Error, Ctx, &Mapping1);
   EXPECT_TRUE(Mod1 == nullptr);

   // Check that we pass the correct DL str to the callback,
   // that fixing the DL str from the callback works,
   // and that the resulting module has the correct DL.
   SlotMapping Mapping2;
   auto Mod2 = parseAssembly(
       SourceBuffer, Error, Ctx, &Mapping2,
       [&](StringRef Triple, StringRef DLStr) -> std::optional<std::string> {
         EXPECT_EQ(DLStr, InvalidDLStr);
         return std::string{FixedDLStr};
       });
   ASSERT_TRUE(Mod2 != nullptr);
   EXPECT_EQ(Mod2->getDataLayout(), FixedDL);
 }

 TEST(AsmParserTest, DIExpressionBodyAtBeginningWithSlotMappingParsing) {
   LLVMContext Ctx;
   SMDiagnostic Error;
   StringRef Source = "";
   SlotMapping Mapping;
   auto Mod = parseAssemblyString(Source, Error, Ctx, &Mapping);
   ASSERT_TRUE(Mod != nullptr);
   auto &M = *Mod;
   unsigned Read;

   ASSERT_EQ(Mapping.MetadataNodes.size(), 0u);

   DIExpression *Expr;

   Expr = parseDIExpressionBodyAtBeginning("()", Read, Error, M, &Mapping);
   ASSERT_TRUE(Expr);
   ASSERT_EQ(Expr->getNumElements(), 0u);

   Expr = parseDIExpressionBodyAtBeginning("(0)", Read, Error, M, &Mapping);
   ASSERT_TRUE(Expr);
   ASSERT_EQ(Expr->getNumElements(), 1u);

   Expr = parseDIExpressionBodyAtBeginning("(DW_OP_LLVM_fragment, 0, 1)", Read,
                                           Error, M, &Mapping);
   ASSERT_TRUE(Expr);
   ASSERT_EQ(Expr->getNumElements(), 3u);

   Expr = parseDIExpressionBodyAtBeginning(
       "(DW_OP_LLVM_fragment, 0, 1)  trailing source", Read, Error, M, &Mapping);
   ASSERT_TRUE(Expr);
   ASSERT_EQ(Expr->getNumElements(), 3u);
   ASSERT_EQ(Read, StringRef("(DW_OP_LLVM_fragment, 0, 1)  ").size());

   Error = {};
   Expr = parseDIExpressionBodyAtBeginning("i32", Read, Error, M, &Mapping);
   ASSERT_FALSE(Expr);
   ASSERT_EQ(Error.getMessage(), "expected '(' here");

   Error = {};
   Expr = parseDIExpressionBodyAtBeginning(
       "!DIExpression(DW_OP_LLVM_fragment, 0, 1)", Read, Error, M, &Mapping);
   ASSERT_FALSE(Expr);
   ASSERT_EQ(Error.getMessage(), "expected '(' here");

   ASSERT_EQ(Mapping.MetadataNodes.size(), 0u);
 }

 } // end anonymous namespace
	//===- llvm/unittest/AsmParser/AsmParserTest.cpp - asm parser unittests ---===//
	//
	// 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/ADT/StringRef.h"
	#include "llvm/AsmParser/Parser.h"
	#include "llvm/AsmParser/SlotMapping.h"
	#include "llvm/IR/Constants.h"
	#include "llvm/IR/DataLayout.h"
	#include "llvm/IR/DebugInfoMetadata.h"
	#include "llvm/IR/LLVMContext.h"
	#include "llvm/IR/Module.h"
	#include "llvm/Support/Error.h"
	#include "llvm/Support/SourceMgr.h"
	#include "gtest/gtest.h"

	using namespace llvm;

	namespace {

	TEST(AsmParserTest, NullTerminatedInput) {
	LLVMContext Ctx;
	StringRef Source = "; Empty module \n";
	SMDiagnostic Error;
	auto Mod = parseAssemblyString(Source, Error, Ctx);

	EXPECT_TRUE(Mod != nullptr);
	EXPECT_TRUE(Error.getMessage().empty());
	}

	#ifdef GTEST_HAS_DEATH_TEST
	#ifndef NDEBUG

	TEST(AsmParserTest, NonNullTerminatedInput) {
	LLVMContext Ctx;
	StringRef Source = "; Empty module \n\1\2";
	SMDiagnostic Error;
	std::unique_ptr<Module> Mod;
	EXPECT_DEATH(Mod = parseAssemblyString(Source.substr(0, Source.size() - 2),
	Error, Ctx),
	"Buffer is not null terminated!");
	}

	#endif
	#endif

	TEST(AsmParserTest, SlotMappingTest) {
	LLVMContext Ctx;
	StringRef Source = "@0 = global i32 0\n !0 = !{}\n !42 = !{i32 42}";
	SMDiagnostic Error;
	SlotMapping Mapping;
	auto Mod = parseAssemblyString(Source, Error, Ctx, &Mapping);

	EXPECT_TRUE(Mod != nullptr);
	EXPECT_TRUE(Error.getMessage().empty());

	ASSERT_EQ(Mapping.GlobalValues.getNext(), 1u);
	EXPECT_TRUE(isa<GlobalVariable>(Mapping.GlobalValues.get(0)));

	EXPECT_EQ(Mapping.MetadataNodes.size(), 2u);
	EXPECT_EQ(Mapping.MetadataNodes.count(0), 1u);
	EXPECT_EQ(Mapping.MetadataNodes.count(42), 1u);
	EXPECT_EQ(Mapping.MetadataNodes.count(1), 0u);
	}

	TEST(AsmParserTest, TypeAndConstantValueParsing) {
	LLVMContext Ctx;
	SMDiagnostic Error;
	StringRef Source = "define void @test() {\n entry:\n ret void\n}";
	auto Mod = parseAssemblyString(Source, Error, Ctx);
	ASSERT_TRUE(Mod != nullptr);
	auto &M = *Mod;

	const Value *V;
	V = parseConstantValue("double 3.5", Error, M);
	ASSERT_TRUE(V);
	EXPECT_TRUE(V->getType()->isDoubleTy());
	ASSERT_TRUE(isa<ConstantFP>(V));
	EXPECT_TRUE(cast<ConstantFP>(V)->isExactlyValue(3.5));

	V = parseConstantValue("i32 42", Error, M);
	ASSERT_TRUE(V);
	EXPECT_TRUE(V->getType()->isIntegerTy());
	ASSERT_TRUE(isa<ConstantInt>(V));
	EXPECT_TRUE(cast<ConstantInt>(V)->equalsInt(42));

	V = parseConstantValue("<4 x i32> <i32 0, i32 1, i32 2, i32 3>", Error, M);
	ASSERT_TRUE(V);
	EXPECT_TRUE(V->getType()->isVectorTy());
	ASSERT_TRUE(isa<ConstantDataVector>(V));

	V = parseConstantValue("<4 x i32> splat (i32 -2)", Error, M);
	ASSERT_TRUE(V);
	EXPECT_TRUE(V->getType()->isVectorTy());
	ASSERT_TRUE(isa<ConstantDataVector>(V));

	V = parseConstantValue("<4 x i32> zeroinitializer", Error, M);
	ASSERT_TRUE(V);
	EXPECT_TRUE(V->getType()->isVectorTy());
	ASSERT_TRUE(isa<Constant>(V));
	EXPECT_TRUE(cast<Constant>(V)->isNullValue());

	V = parseConstantValue("<4 x i32> poison", Error, M);
	ASSERT_TRUE(V);
	EXPECT_TRUE(V->getType()->isVectorTy());
	ASSERT_TRUE(isa<PoisonValue>(V));

	V = parseConstantValue("i32 add (i32 1, i32 2)", Error, M);
	ASSERT_TRUE(V);
	ASSERT_TRUE(isa<ConstantInt>(V));

	V = parseConstantValue("ptr blockaddress(@test, %entry)", Error, M);
	ASSERT_TRUE(V);
	ASSERT_TRUE(isa<BlockAddress>(V));

	V = parseConstantValue("ptr undef", Error, M);
	ASSERT_TRUE(V);
	ASSERT_TRUE(isa<UndefValue>(V));

	V = parseConstantValue("ptr poison", Error, M);
	ASSERT_TRUE(V);
	ASSERT_TRUE(isa<PoisonValue>(V));

	EXPECT_FALSE(parseConstantValue("duble 3.25", Error, M));
	EXPECT_EQ(Error.getMessage(), "expected type");

	EXPECT_FALSE(parseConstantValue("i32 3.25", Error, M));
	EXPECT_EQ(Error.getMessage(), "floating point constant invalid for type");

	EXPECT_FALSE(parseConstantValue("ptr @foo", Error, M));
	EXPECT_EQ(Error.getMessage(), "expected a constant value");

	EXPECT_FALSE(parseConstantValue("i32 3, ", Error, M));
	EXPECT_EQ(Error.getMessage(), "expected end of string");
	}

	TEST(AsmParserTest, TypeAndConstantValueWithSlotMappingParsing) {
	LLVMContext Ctx;
	SMDiagnostic Error;
	StringRef Source =
	"%st = type { i32, i32 }\n"
	"@v = common global [50 x %st] zeroinitializer, align 16\n"
	"%0 = type { i32, i32, i32, i32 }\n"
	"@g = common global [50 x %0] zeroinitializer, align 16\n"
	"define void @marker4(i64 %d) {\n"
	"entry:\n"
	" %conv = trunc i64 %d to i32\n"
	" store i32 %conv, ptr getelementptr inbounds "
	" ([50 x %st], ptr @v, i64 0, i64 1, i32 0), align 16\n"
	" store i32 %conv, ptr getelementptr inbounds "
	" ([50 x %0], ptr @g, i64 0, i64 1, i32 0), align 16\n"
	" ret void\n"
	"}";
	SlotMapping Mapping;
	auto Mod = parseAssemblyString(Source, Error, Ctx, &Mapping);
	ASSERT_TRUE(Mod != nullptr);
	auto &M = *Mod;

	const Value *V;
	V = parseConstantValue("ptr getelementptr inbounds ([50 x %st], ptr "
	"@v, i64 0, i64 1, i32 0)",
	Error, M, &Mapping);
	ASSERT_TRUE(V);
	ASSERT_TRUE(isa<ConstantExpr>(V));

	V = parseConstantValue("ptr getelementptr inbounds ([50 x %0], ptr "
	"@g, i64 0, i64 1, i32 0)",
	Error, M, &Mapping);
	ASSERT_TRUE(V);
	ASSERT_TRUE(isa<ConstantExpr>(V));
	}

	TEST(AsmParserTest, TypeWithSlotMappingParsing) {
	LLVMContext Ctx;
	SMDiagnostic Error;
	StringRef Source =
	"%st = type { i32, i32 }\n"
	"@v = common global [50 x %st] zeroinitializer, align 16\n"
	"%0 = type { i32, i32, i32, i32 }\n"
	"@g = common global [50 x %0] zeroinitializer, align 16\n"
	"define void @marker4(i64 %d) {\n"
	"entry:\n"
	" %conv = trunc i64 %d to i32\n"
	" store i32 %conv, ptr getelementptr inbounds "
	" ([50 x %st], ptr @v, i64 0, i64 0, i32 0), align 16\n"
	" store i32 %conv, ptr getelementptr inbounds "
	" ([50 x %0], ptr @g, i64 0, i64 0, i32 0), align 16\n"
	" ret void\n"
	"}";
	SlotMapping Mapping;
	auto Mod = parseAssemblyString(Source, Error, Ctx, &Mapping);
	ASSERT_TRUE(Mod != nullptr);
	auto &M = *Mod;

	// Check we properly parse integer types.
	Type *Ty;
	Ty = parseType("i32", Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isIntegerTy());
	ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);

	// Check we properly parse integer types with exotic size.
	Ty = parseType("i13", Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isIntegerTy());
	ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 13);

	// Check we properly parse floating point types.
	Ty = parseType("float", Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isFloatTy());

	Ty = parseType("double", Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isDoubleTy());

	// Check we properly parse struct types.
	// Named struct.
	Ty = parseType("%st", Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isStructTy());

	// Check the details of the struct.
	StructType *ST = cast<StructType>(Ty);
	ASSERT_TRUE(ST->getNumElements() == 2);
	for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i) {
	Ty = ST->getElementType(i);
	ASSERT_TRUE(Ty->isIntegerTy());
	ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);
	}

	// Anonymous struct.
	Ty = parseType("%0", Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isStructTy());

	// Check the details of the struct.
	ST = cast<StructType>(Ty);
	ASSERT_TRUE(ST->getNumElements() == 4);
	for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i) {
	Ty = ST->getElementType(i);
	ASSERT_TRUE(Ty->isIntegerTy());
	ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);
	}

	// Check we properly parse vector types.
	Ty = parseType("<5 x i32>", Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isVectorTy());

	// Check the details of the vector.
	auto *VT = cast<FixedVectorType>(Ty);
	ASSERT_TRUE(VT->getNumElements() == 5);
	ASSERT_TRUE(VT->getPrimitiveSizeInBits().getFixedValue() == 160);
	Ty = VT->getElementType();
	ASSERT_TRUE(Ty->isIntegerTy());
	ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);

	// Opaque struct.
	Ty = parseType("%opaque", Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isStructTy());

	ST = cast<StructType>(Ty);
	ASSERT_TRUE(ST->isOpaque());

	// Check we properly parse pointer types.
	Ty = parseType("ptr", Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isPointerTy());

	// Check that we reject types with garbage.
	Ty = parseType("i32 garbage", Error, M, &Mapping);
	ASSERT_TRUE(!Ty);
	}

	TEST(AsmParserTest, TypeAtBeginningWithSlotMappingParsing) {
	LLVMContext Ctx;
	SMDiagnostic Error;
	StringRef Source =
	"%st = type { i32, i32 }\n"
	"@v = common global [50 x %st] zeroinitializer, align 16\n"
	"%0 = type { i32, i32, i32, i32 }\n"
	"@g = common global [50 x %0] zeroinitializer, align 16\n"
	"define void @marker4(i64 %d) {\n"
	"entry:\n"
	" %conv = trunc i64 %d to i32\n"
	" store i32 %conv, ptr getelementptr inbounds "
	" ([50 x %st], ptr @v, i64 0, i64 0, i32 0), align 16\n"
	" store i32 %conv, ptr getelementptr inbounds "
	" ([50 x %0], ptr @g, i64 0, i64 0, i32 0), align 16\n"
	" ret void\n"
	"}";
	SlotMapping Mapping;
	auto Mod = parseAssemblyString(Source, Error, Ctx, &Mapping);
	ASSERT_TRUE(Mod != nullptr);
	auto &M = *Mod;
	unsigned Read;

	// Check we properly parse integer types.
	Type *Ty;
	Ty = parseTypeAtBeginning("i32", Read, Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isIntegerTy());
	ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);
	ASSERT_TRUE(Read == 3);

	// Check we properly parse integer types with exotic size.
	Ty = parseTypeAtBeginning("i13", Read, Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isIntegerTy());
	ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 13);
	ASSERT_TRUE(Read == 3);

	// Check we properly parse floating point types.
	Ty = parseTypeAtBeginning("float", Read, Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isFloatTy());
	ASSERT_TRUE(Read == 5);

	Ty = parseTypeAtBeginning("double", Read, Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isDoubleTy());
	ASSERT_TRUE(Read == 6);

	// Check we properly parse struct types.
	// Named struct.
	Ty = parseTypeAtBeginning("%st", Read, Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isStructTy());
	ASSERT_TRUE(Read == 3);

	// Check the details of the struct.
	StructType *ST = cast<StructType>(Ty);
	ASSERT_TRUE(ST->getNumElements() == 2);
	for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i) {
	Ty = ST->getElementType(i);
	ASSERT_TRUE(Ty->isIntegerTy());
	ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);
	}

	// Anonymous struct.
	Ty = parseTypeAtBeginning("%0", Read, Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isStructTy());
	ASSERT_TRUE(Read == 2);

	// Check the details of the struct.
	ST = cast<StructType>(Ty);
	ASSERT_TRUE(ST->getNumElements() == 4);
	for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i) {
	Ty = ST->getElementType(i);
	ASSERT_TRUE(Ty->isIntegerTy());
	ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);
	}

	// Check we properly parse vector types.
	Ty = parseTypeAtBeginning("<5 x i32>", Read, Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isVectorTy());
	ASSERT_TRUE(Read == 9);

	// Check the details of the vector.
	auto *VT = cast<FixedVectorType>(Ty);
	ASSERT_TRUE(VT->getNumElements() == 5);
	ASSERT_TRUE(VT->getPrimitiveSizeInBits().getFixedValue() == 160);
	Ty = VT->getElementType();
	ASSERT_TRUE(Ty->isIntegerTy());
	ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);

	// Opaque struct.
	Ty = parseTypeAtBeginning("%opaque", Read, Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isStructTy());
	ASSERT_TRUE(Read == 7);

	ST = cast<StructType>(Ty);
	ASSERT_TRUE(ST->isOpaque());

	// Check we properly parse pointer types.
	// One indirection.
	Ty = parseTypeAtBeginning("ptr", Read, Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isPointerTy());
	ASSERT_TRUE(Read == 3);

	// Check that we reject types with garbage.
	Ty = parseTypeAtBeginning("i32 garbage", Read, Error, M, &Mapping);
	ASSERT_TRUE(Ty);
	ASSERT_TRUE(Ty->isIntegerTy());
	ASSERT_TRUE(Ty->getPrimitiveSizeInBits() == 32);
	// We go to the next token, i.e., we read "i32" + ' '.
	ASSERT_TRUE(Read == 4);
	}

	TEST(AsmParserTest, InvalidDataLayoutStringCallback) {
	LLVMContext Ctx;
	SMDiagnostic Error;
	// Note the invalid i8:7 part
	// Overalign i32 as marker so we can check that indeed this DL was used,
	// and not some default.
	StringRef InvalidDLStr =
	"e-m:e-p:64:64-i8:7-i16:16-i32:64-i64:64-f80:128-n8:16:32:64";
	StringRef FixedDLStr =
	"e-m:e-p:64:64-i8:8-i16:16-i32:64-i64:64-f80:128-n8:16:32:64";
	Expected<DataLayout> ExpectedFixedDL = DataLayout::parse(FixedDLStr);
	ASSERT_TRUE(!ExpectedFixedDL.takeError());
	DataLayout FixedDL = ExpectedFixedDL.get();
	std::string Source = ("target datalayout = \"" + InvalidDLStr + "\"\n").str();
	MemoryBufferRef SourceBuffer(Source, "<string>");

	// Check that we reject the source without a DL override.
	SlotMapping Mapping1;
	auto Mod1 = parseAssembly(SourceBuffer, Error, Ctx, &Mapping1);
	EXPECT_TRUE(Mod1 == nullptr);

	// Check that we pass the correct DL str to the callback,
	// that fixing the DL str from the callback works,
	// and that the resulting module has the correct DL.
	SlotMapping Mapping2;
	auto Mod2 = parseAssembly(
	SourceBuffer, Error, Ctx, &Mapping2,
	[&](StringRef Triple, StringRef DLStr) -> std::optional<std::string> {
	EXPECT_EQ(DLStr, InvalidDLStr);
	return std::string{FixedDLStr};
	});
	ASSERT_TRUE(Mod2 != nullptr);
	EXPECT_EQ(Mod2->getDataLayout(), FixedDL);
	}

	TEST(AsmParserTest, DIExpressionBodyAtBeginningWithSlotMappingParsing) {
	LLVMContext Ctx;
	SMDiagnostic Error;
	StringRef Source = "";
	SlotMapping Mapping;
	auto Mod = parseAssemblyString(Source, Error, Ctx, &Mapping);
	ASSERT_TRUE(Mod != nullptr);
	auto &M = *Mod;
	unsigned Read;

	ASSERT_EQ(Mapping.MetadataNodes.size(), 0u);

	DIExpression *Expr;

	Expr = parseDIExpressionBodyAtBeginning("()", Read, Error, M, &Mapping);
	ASSERT_TRUE(Expr);
	ASSERT_EQ(Expr->getNumElements(), 0u);

	Expr = parseDIExpressionBodyAtBeginning("(0)", Read, Error, M, &Mapping);
	ASSERT_TRUE(Expr);
	ASSERT_EQ(Expr->getNumElements(), 1u);

	Expr = parseDIExpressionBodyAtBeginning("(DW_OP_LLVM_fragment, 0, 1)", Read,
	Error, M, &Mapping);
	ASSERT_TRUE(Expr);
	ASSERT_EQ(Expr->getNumElements(), 3u);

	Expr = parseDIExpressionBodyAtBeginning(
	"(DW_OP_LLVM_fragment, 0, 1) trailing source", Read, Error, M, &Mapping);
	ASSERT_TRUE(Expr);
	ASSERT_EQ(Expr->getNumElements(), 3u);
	ASSERT_EQ(Read, StringRef("(DW_OP_LLVM_fragment, 0, 1) ").size());

	Error = {};
	Expr = parseDIExpressionBodyAtBeginning("i32", Read, Error, M, &Mapping);
	ASSERT_FALSE(Expr);
	ASSERT_EQ(Error.getMessage(), "expected '(' here");

	Error = {};
	Expr = parseDIExpressionBodyAtBeginning(
	"!DIExpression(DW_OP_LLVM_fragment, 0, 1)", Read, Error, M, &Mapping);
	ASSERT_FALSE(Expr);
	ASSERT_EQ(Error.getMessage(), "expected '(' here");

	ASSERT_EQ(Mapping.MetadataNodes.size(), 0u);
	}

	} // end anonymous namespace