LLVMMemorySlot.cpp | Explore in Territory

//===- LLVMMemorySlot.cpp - MemorySlot interfaces ---------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file implements MemorySlot-related interfaces for LLVM dialect
// operations.
//
//===----------------------------------------------------------------------===//

#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
#include "mlir/Dialect/LLVMIR/LLVMTypes.h"
#include "mlir/IR/Matchers.h"
#include "mlir/IR/PatternMatch.h"
#include "mlir/Interfaces/DataLayoutInterfaces.h"
#include "mlir/Interfaces/MemorySlotInterfaces.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/TypeSwitch.h"

#define DEBUG_TYPE …

usingnamespacemlir;

//===----------------------------------------------------------------------===//
// Interfaces for AllocaOp
//===----------------------------------------------------------------------===//

llvm::SmallVector<MemorySlot> LLVM::AllocaOp::getPromotableSlots() { … }

Value LLVM::AllocaOp::getDefaultValue(const MemorySlot &slot,
                                      OpBuilder &builder) { … }

void LLVM::AllocaOp::handleBlockArgument(const MemorySlot &slot,
                                         BlockArgument argument,
                                         OpBuilder &builder) { … }

std::optional<PromotableAllocationOpInterface>
LLVM::AllocaOp::handlePromotionComplete(const MemorySlot &slot,
                                        Value defaultValue,
                                        OpBuilder &builder) { … }

SmallVector<DestructurableMemorySlot> LLVM::AllocaOp::getDestructurableSlots() { … }

DenseMap<Attribute, MemorySlot> LLVM::AllocaOp::destructure(
    const DestructurableMemorySlot &slot,
    const SmallPtrSetImpl<Attribute> &usedIndices, OpBuilder &builder,
    SmallVectorImpl<DestructurableAllocationOpInterface> &newAllocators) { … }

std::optional<DestructurableAllocationOpInterface>
LLVM::AllocaOp::handleDestructuringComplete(
    const DestructurableMemorySlot &slot, OpBuilder &builder) { … }

//===----------------------------------------------------------------------===//
// Interfaces for LoadOp/StoreOp
//===----------------------------------------------------------------------===//

bool LLVM::LoadOp::loadsFrom(const MemorySlot &slot) { … }

bool LLVM::LoadOp::storesTo(const MemorySlot &slot) { … }

Value LLVM::LoadOp::getStored(const MemorySlot &slot, OpBuilder &builder,
                              Value reachingDef, const DataLayout &dataLayout) { … }

bool LLVM::StoreOp::loadsFrom(const MemorySlot &slot) { … }

bool LLVM::StoreOp::storesTo(const MemorySlot &slot) { … }

/// Checks if `type` can be used in any kind of conversion sequences.
static bool isSupportedTypeForConversion(Type type) { … }

/// Checks that `rhs` can be converted to `lhs` by a sequence of casts and
/// truncations. Checks for narrowing or widening conversion compatibility
/// depending on `narrowingConversion`.
static bool areConversionCompatible(const DataLayout &layout, Type targetType,
                                    Type srcType, bool narrowingConversion) { … }

/// Checks if `dataLayout` describes a little endian layout.
static bool isBigEndian(const DataLayout &dataLayout) { … }

/// Converts a value to an integer type of the same size.
/// Assumes that the type can be converted.
static Value castToSameSizedInt(OpBuilder &builder, Location loc, Value val,
                                const DataLayout &dataLayout) { … }

/// Converts a value with an integer type to `targetType`.
static Value castIntValueToSameSizedType(OpBuilder &builder, Location loc,
                                         Value val, Type targetType) { … }

/// Constructs operations that convert `srcValue` into a new value of type
/// `targetType`. Assumes the types have the same bitsize.
static Value castSameSizedTypes(OpBuilder &builder, Location loc,
                                Value srcValue, Type targetType,
                                const DataLayout &dataLayout) { … }

/// Constructs operations that convert `srcValue` into a new value of type
/// `targetType`. Performs bit-level extraction if the source type is larger
/// than the target type. Assumes that this conversion is possible.
static Value createExtractAndCast(OpBuilder &builder, Location loc,
                                  Value srcValue, Type targetType,
                                  const DataLayout &dataLayout) { … }

/// Constructs operations that insert the bits of `srcValue` into the
/// "beginning" of `reachingDef` (beginning is endianness dependent).
/// Assumes that this conversion is possible.
static Value createInsertAndCast(OpBuilder &builder, Location loc,
                                 Value srcValue, Value reachingDef,
                                 const DataLayout &dataLayout) { … }

Value LLVM::StoreOp::getStored(const MemorySlot &slot, OpBuilder &builder,
                               Value reachingDef,
                               const DataLayout &dataLayout) { … }

bool LLVM::LoadOp::canUsesBeRemoved(
    const MemorySlot &slot, const SmallPtrSetImpl<OpOperand *> &blockingUses,
    SmallVectorImpl<OpOperand *> &newBlockingUses,
    const DataLayout &dataLayout) { … }

DeletionKind LLVM::LoadOp::removeBlockingUses(
    const MemorySlot &slot, const SmallPtrSetImpl<OpOperand *> &blockingUses,
    OpBuilder &builder, Value reachingDefinition,
    const DataLayout &dataLayout) { … }

bool LLVM::StoreOp::canUsesBeRemoved(
    const MemorySlot &slot, const SmallPtrSetImpl<OpOperand *> &blockingUses,
    SmallVectorImpl<OpOperand *> &newBlockingUses,
    const DataLayout &dataLayout) { … }

DeletionKind LLVM::StoreOp::removeBlockingUses(
    const MemorySlot &slot, const SmallPtrSetImpl<OpOperand *> &blockingUses,
    OpBuilder &builder, Value reachingDefinition,
    const DataLayout &dataLayout) { … }

/// Checks if `slot` can be accessed through the provided access type.
static bool isValidAccessType(const MemorySlot &slot, Type accessType,
                              const DataLayout &dataLayout) { … }

LogicalResult LLVM::LoadOp::ensureOnlySafeAccesses(
    const MemorySlot &slot, SmallVectorImpl<MemorySlot> &mustBeSafelyUsed,
    const DataLayout &dataLayout) { … }

LogicalResult LLVM::StoreOp::ensureOnlySafeAccesses(
    const MemorySlot &slot, SmallVectorImpl<MemorySlot> &mustBeSafelyUsed,
    const DataLayout &dataLayout) { … }

/// Returns the subslot's type at the requested index.
static Type getTypeAtIndex(const DestructurableMemorySlot &slot,
                           Attribute index) { … }

bool LLVM::LoadOp::canRewire(const DestructurableMemorySlot &slot,
                             SmallPtrSetImpl<Attribute> &usedIndices,
                             SmallVectorImpl<MemorySlot> &mustBeSafelyUsed,
                             const DataLayout &dataLayout) { … }

DeletionKind LLVM::LoadOp::rewire(const DestructurableMemorySlot &slot,
                                  DenseMap<Attribute, MemorySlot> &subslots,
                                  OpBuilder &builder,
                                  const DataLayout &dataLayout) { … }

bool LLVM::StoreOp::canRewire(const DestructurableMemorySlot &slot,
                              SmallPtrSetImpl<Attribute> &usedIndices,
                              SmallVectorImpl<MemorySlot> &mustBeSafelyUsed,
                              const DataLayout &dataLayout) { … }

DeletionKind LLVM::StoreOp::rewire(const DestructurableMemorySlot &slot,
                                   DenseMap<Attribute, MemorySlot> &subslots,
                                   OpBuilder &builder,
                                   const DataLayout &dataLayout) { … }

//===----------------------------------------------------------------------===//
// Interfaces for discardable OPs
//===----------------------------------------------------------------------===//

/// Conditions the deletion of the operation to the removal of all its uses.
static bool forwardToUsers(Operation *op,
                           SmallVectorImpl<OpOperand *> &newBlockingUses) { … }

bool LLVM::BitcastOp::canUsesBeRemoved(
    const SmallPtrSetImpl<OpOperand *> &blockingUses,
    SmallVectorImpl<OpOperand *> &newBlockingUses,
    const DataLayout &dataLayout) { … }

DeletionKind LLVM::BitcastOp::removeBlockingUses(
    const SmallPtrSetImpl<OpOperand *> &blockingUses, OpBuilder &builder) { … }

bool LLVM::AddrSpaceCastOp::canUsesBeRemoved(
    const SmallPtrSetImpl<OpOperand *> &blockingUses,
    SmallVectorImpl<OpOperand *> &newBlockingUses,
    const DataLayout &dataLayout) { … }

DeletionKind LLVM::AddrSpaceCastOp::removeBlockingUses(
    const SmallPtrSetImpl<OpOperand *> &blockingUses, OpBuilder &builder) { … }

bool LLVM::LifetimeStartOp::canUsesBeRemoved(
    const SmallPtrSetImpl<OpOperand *> &blockingUses,
    SmallVectorImpl<OpOperand *> &newBlockingUses,
    const DataLayout &dataLayout) { … }

DeletionKind LLVM::LifetimeStartOp::removeBlockingUses(
    const SmallPtrSetImpl<OpOperand *> &blockingUses, OpBuilder &builder) { … }

bool LLVM::LifetimeEndOp::canUsesBeRemoved(
    const SmallPtrSetImpl<OpOperand *> &blockingUses,
    SmallVectorImpl<OpOperand *> &newBlockingUses,
    const DataLayout &dataLayout) { … }

DeletionKind LLVM::LifetimeEndOp::removeBlockingUses(
    const SmallPtrSetImpl<OpOperand *> &blockingUses, OpBuilder &builder) { … }

bool LLVM::InvariantStartOp::canUsesBeRemoved(
    const SmallPtrSetImpl<OpOperand *> &blockingUses,
    SmallVectorImpl<OpOperand *> &newBlockingUses,
    const DataLayout &dataLayout) { … }

DeletionKind LLVM::InvariantStartOp::removeBlockingUses(
    const SmallPtrSetImpl<OpOperand *> &blockingUses, OpBuilder &builder) { … }

bool LLVM::InvariantEndOp::canUsesBeRemoved(
    const SmallPtrSetImpl<OpOperand *> &blockingUses,
    SmallVectorImpl<OpOperand *> &newBlockingUses,
    const DataLayout &dataLayout) { … }

DeletionKind LLVM::InvariantEndOp::removeBlockingUses(
    const SmallPtrSetImpl<OpOperand *> &blockingUses, OpBuilder &builder) { … }

bool LLVM::DbgDeclareOp::canUsesBeRemoved(
    const SmallPtrSetImpl<OpOperand *> &blockingUses,
    SmallVectorImpl<OpOperand *> &newBlockingUses,
    const DataLayout &dataLayout) { … }

DeletionKind LLVM::DbgDeclareOp::removeBlockingUses(
    const SmallPtrSetImpl<OpOperand *> &blockingUses, OpBuilder &builder) { … }

bool LLVM::DbgValueOp::canUsesBeRemoved(
    const SmallPtrSetImpl<OpOperand *> &blockingUses,
    SmallVectorImpl<OpOperand *> &newBlockingUses,
    const DataLayout &dataLayout) { … }

DeletionKind LLVM::DbgValueOp::removeBlockingUses(
    const SmallPtrSetImpl<OpOperand *> &blockingUses, OpBuilder &builder) { … }

bool LLVM::DbgDeclareOp::requiresReplacedValues() { … }

void LLVM::DbgDeclareOp::visitReplacedValues(
    ArrayRef<std::pair<Operation *, Value>> definitions, OpBuilder &builder) { … }

//===----------------------------------------------------------------------===//
// Interfaces for GEPOp
//===----------------------------------------------------------------------===//

static bool hasAllZeroIndices(LLVM::GEPOp gepOp) { … }

bool LLVM::GEPOp::canUsesBeRemoved(
    const SmallPtrSetImpl<OpOperand *> &blockingUses,
    SmallVectorImpl<OpOperand *> &newBlockingUses,
    const DataLayout &dataLayout) { … }

DeletionKind LLVM::GEPOp::removeBlockingUses(
    const SmallPtrSetImpl<OpOperand *> &blockingUses, OpBuilder &builder) { … }

/// Returns the amount of bytes the provided GEP elements will offset the
/// pointer by. Returns nullopt if no constant offset could be computed.
static std::optional<uint64_t> gepToByteOffset(const DataLayout &dataLayout,
                                               LLVM::GEPOp gep) { … }

namespace {
/// A struct that stores both the index into the aggregate type of the slot as
/// well as the corresponding byte offset in memory.
struct SubslotAccessInfo { … };
} // namespace

/// Computes subslot access information for an access into `slot` with the given
/// offset.
/// Returns nullopt when the offset is out-of-bounds or when the access is into
/// the padding of `slot`.
static std::optional<SubslotAccessInfo>
getSubslotAccessInfo(const DestructurableMemorySlot &slot,
                     const DataLayout &dataLayout, LLVM::GEPOp gep) { … }

/// Constructs a byte array type of the given size.
static LLVM::LLVMArrayType getByteArrayType(MLIRContext *context,
                                            unsigned size) { … }

LogicalResult LLVM::GEPOp::ensureOnlySafeAccesses(
    const MemorySlot &slot, SmallVectorImpl<MemorySlot> &mustBeSafelyUsed,
    const DataLayout &dataLayout) { … }

bool LLVM::GEPOp::canRewire(const DestructurableMemorySlot &slot,
                            SmallPtrSetImpl<Attribute> &usedIndices,
                            SmallVectorImpl<MemorySlot> &mustBeSafelyUsed,
                            const DataLayout &dataLayout) { … }

DeletionKind LLVM::GEPOp::rewire(const DestructurableMemorySlot &slot,
                                 DenseMap<Attribute, MemorySlot> &subslots,
                                 OpBuilder &builder,
                                 const DataLayout &dataLayout) { … }

//===----------------------------------------------------------------------===//
// Utilities for memory intrinsics
//===----------------------------------------------------------------------===//

namespace {

/// Returns the length of the given memory intrinsic in bytes if it can be known
/// at compile-time on a best-effort basis, nothing otherwise.
template <class MemIntr>
std::optional<uint64_t> getStaticMemIntrLen(MemIntr op) { … }

/// Returns the length of the given memory intrinsic in bytes if it can be known
/// at compile-time on a best-effort basis, nothing otherwise.
/// Because MemcpyInlineOp has its length encoded as an attribute, this requires
/// specialized handling.
template <>
std::optional<uint64_t> getStaticMemIntrLen(LLVM::MemcpyInlineOp op) { … }

} // namespace

/// Returns whether one can be sure the memory intrinsic does not write outside
/// of the bounds of the given slot, on a best-effort basis.
template <class MemIntr>
static bool definitelyWritesOnlyWithinSlot(MemIntr op, const MemorySlot &slot,
                                           const DataLayout &dataLayout) { … }

/// Checks whether all indices are i32. This is used to check GEPs can index
/// into them.
static bool areAllIndicesI32(const DestructurableMemorySlot &slot) { … }

//===----------------------------------------------------------------------===//
// Interfaces for memset
//===----------------------------------------------------------------------===//

bool LLVM::MemsetOp::loadsFrom(const MemorySlot &slot) { … }

bool LLVM::MemsetOp::storesTo(const MemorySlot &slot) { … }

Value LLVM::MemsetOp::getStored(const MemorySlot &slot, OpBuilder &builder,
                                Value reachingDef,
                                const DataLayout &dataLayout) { … }

bool LLVM::MemsetOp::canUsesBeRemoved(
    const MemorySlot &slot, const SmallPtrSetImpl<OpOperand *> &blockingUses,
    SmallVectorImpl<OpOperand *> &newBlockingUses,
    const DataLayout &dataLayout) { … }

DeletionKind LLVM::MemsetOp::removeBlockingUses(
    const MemorySlot &slot, const SmallPtrSetImpl<OpOperand *> &blockingUses,
    OpBuilder &builder, Value reachingDefinition,
    const DataLayout &dataLayout) { … }

LogicalResult LLVM::MemsetOp::ensureOnlySafeAccesses(
    const MemorySlot &slot, SmallVectorImpl<MemorySlot> &mustBeSafelyUsed,
    const DataLayout &dataLayout) { … }

bool LLVM::MemsetOp::canRewire(const DestructurableMemorySlot &slot,
                               SmallPtrSetImpl<Attribute> &usedIndices,
                               SmallVectorImpl<MemorySlot> &mustBeSafelyUsed,
                               const DataLayout &dataLayout) { … }

DeletionKind LLVM::MemsetOp::rewire(const DestructurableMemorySlot &slot,
                                    DenseMap<Attribute, MemorySlot> &subslots,
                                    OpBuilder &builder,
                                    const DataLayout &dataLayout) { … }

//===----------------------------------------------------------------------===//
// Interfaces for memcpy/memmove
//===----------------------------------------------------------------------===//

template <class MemcpyLike>
static bool memcpyLoadsFrom(MemcpyLike op, const MemorySlot &slot) { … }

template <class MemcpyLike>
static bool memcpyStoresTo(MemcpyLike op, const MemorySlot &slot) { … }

template <class MemcpyLike>
static Value memcpyGetStored(MemcpyLike op, const MemorySlot &slot,
                             OpBuilder &builder) { … }

template <class MemcpyLike>
static bool
memcpyCanUsesBeRemoved(MemcpyLike op, const MemorySlot &slot,
                       const SmallPtrSetImpl<OpOperand *> &blockingUses,
                       SmallVectorImpl<OpOperand *> &newBlockingUses,
                       const DataLayout &dataLayout) { … }

template <class MemcpyLike>
static DeletionKind
memcpyRemoveBlockingUses(MemcpyLike op, const MemorySlot &slot,
                         const SmallPtrSetImpl<OpOperand *> &blockingUses,
                         OpBuilder &builder, Value reachingDefinition) { … }

template <class MemcpyLike>
static LogicalResult
memcpyEnsureOnlySafeAccesses(MemcpyLike op, const MemorySlot &slot,
                             SmallVectorImpl<MemorySlot> &mustBeSafelyUsed) { … }

template <class MemcpyLike>
static bool memcpyCanRewire(MemcpyLike op, const DestructurableMemorySlot &slot,
                            SmallPtrSetImpl<Attribute> &usedIndices,
                            SmallVectorImpl<MemorySlot> &mustBeSafelyUsed,
                            const DataLayout &dataLayout) { … }

namespace {

template <class MemcpyLike>
void createMemcpyLikeToReplace(OpBuilder &builder, const DataLayout &layout,
                               MemcpyLike toReplace, Value dst, Value src,
                               Type toCpy, bool isVolatile) { … }

template <>
void createMemcpyLikeToReplace(OpBuilder &builder, const DataLayout &layout,
                               LLVM::MemcpyInlineOp toReplace, Value dst,
                               Value src, Type toCpy, bool isVolatile) { … }

} // namespace

/// Rewires a memcpy-like operation. Only copies to or from the full slot are
/// supported.
template <class MemcpyLike>
static DeletionKind
memcpyRewire(MemcpyLike op, const DestructurableMemorySlot &slot,
             DenseMap<Attribute, MemorySlot> &subslots, OpBuilder &builder,
             const DataLayout &dataLayout) { … }

bool LLVM::MemcpyOp::loadsFrom(const MemorySlot &slot) { … }

bool LLVM::MemcpyOp::storesTo(const MemorySlot &slot) { … }

Value LLVM::MemcpyOp::getStored(const MemorySlot &slot, OpBuilder &builder,
                                Value reachingDef,
                                const DataLayout &dataLayout) { … }

bool LLVM::MemcpyOp::canUsesBeRemoved(
    const MemorySlot &slot, const SmallPtrSetImpl<OpOperand *> &blockingUses,
    SmallVectorImpl<OpOperand *> &newBlockingUses,
    const DataLayout &dataLayout) { … }

DeletionKind LLVM::MemcpyOp::removeBlockingUses(
    const MemorySlot &slot, const SmallPtrSetImpl<OpOperand *> &blockingUses,
    OpBuilder &builder, Value reachingDefinition,
    const DataLayout &dataLayout) { … }

LogicalResult LLVM::MemcpyOp::ensureOnlySafeAccesses(
    const MemorySlot &slot, SmallVectorImpl<MemorySlot> &mustBeSafelyUsed,
    const DataLayout &dataLayout) { … }

bool LLVM::MemcpyOp::canRewire(const DestructurableMemorySlot &slot,
                               SmallPtrSetImpl<Attribute> &usedIndices,
                               SmallVectorImpl<MemorySlot> &mustBeSafelyUsed,
                               const DataLayout &dataLayout) { … }

DeletionKind LLVM::MemcpyOp::rewire(const DestructurableMemorySlot &slot,
                                    DenseMap<Attribute, MemorySlot> &subslots,
                                    OpBuilder &builder,
                                    const DataLayout &dataLayout) { … }

bool LLVM::MemcpyInlineOp::loadsFrom(const MemorySlot &slot) { … }

bool LLVM::MemcpyInlineOp::storesTo(const MemorySlot &slot) { … }

Value LLVM::MemcpyInlineOp::getStored(const MemorySlot &slot,
                                      OpBuilder &builder, Value reachingDef,
                                      const DataLayout &dataLayout) { … }

bool LLVM::MemcpyInlineOp::canUsesBeRemoved(
    const MemorySlot &slot, const SmallPtrSetImpl<OpOperand *> &blockingUses,
    SmallVectorImpl<OpOperand *> &newBlockingUses,
    const DataLayout &dataLayout) { … }

DeletionKind LLVM::MemcpyInlineOp::removeBlockingUses(
    const MemorySlot &slot, const SmallPtrSetImpl<OpOperand *> &blockingUses,
    OpBuilder &builder, Value reachingDefinition,
    const DataLayout &dataLayout) { … }

LogicalResult LLVM::MemcpyInlineOp::ensureOnlySafeAccesses(
    const MemorySlot &slot, SmallVectorImpl<MemorySlot> &mustBeSafelyUsed,
    const DataLayout &dataLayout) { … }

bool LLVM::MemcpyInlineOp::canRewire(
    const DestructurableMemorySlot &slot,
    SmallPtrSetImpl<Attribute> &usedIndices,
    SmallVectorImpl<MemorySlot> &mustBeSafelyUsed,
    const DataLayout &dataLayout) { … }

DeletionKind
LLVM::MemcpyInlineOp::rewire(const DestructurableMemorySlot &slot,
                             DenseMap<Attribute, MemorySlot> &subslots,
                             OpBuilder &builder, const DataLayout &dataLayout) { … }

bool LLVM::MemmoveOp::loadsFrom(const MemorySlot &slot) { … }

bool LLVM::MemmoveOp::storesTo(const MemorySlot &slot) { … }

Value LLVM::MemmoveOp::getStored(const MemorySlot &slot, OpBuilder &builder,
                                 Value reachingDef,
                                 const DataLayout &dataLayout) { … }

bool LLVM::MemmoveOp::canUsesBeRemoved(
    const MemorySlot &slot, const SmallPtrSetImpl<OpOperand *> &blockingUses,
    SmallVectorImpl<OpOperand *> &newBlockingUses,
    const DataLayout &dataLayout) { … }

DeletionKind LLVM::MemmoveOp::removeBlockingUses(
    const MemorySlot &slot, const SmallPtrSetImpl<OpOperand *> &blockingUses,
    OpBuilder &builder, Value reachingDefinition,
    const DataLayout &dataLayout) { … }

LogicalResult LLVM::MemmoveOp::ensureOnlySafeAccesses(
    const MemorySlot &slot, SmallVectorImpl<MemorySlot> &mustBeSafelyUsed,
    const DataLayout &dataLayout) { … }

bool LLVM::MemmoveOp::canRewire(const DestructurableMemorySlot &slot,
                                SmallPtrSetImpl<Attribute> &usedIndices,
                                SmallVectorImpl<MemorySlot> &mustBeSafelyUsed,
                                const DataLayout &dataLayout) { … }

DeletionKind LLVM::MemmoveOp::rewire(const DestructurableMemorySlot &slot,
                                     DenseMap<Attribute, MemorySlot> &subslots,
                                     OpBuilder &builder,
                                     const DataLayout &dataLayout) { … }

//===----------------------------------------------------------------------===//
// Interfaces for destructurable types
//===----------------------------------------------------------------------===//

std::optional<DenseMap<Attribute, Type>>
LLVM::LLVMStructType::getSubelementIndexMap() { … }

Type LLVM::LLVMStructType::getTypeAtIndex(Attribute index) { … }

std::optional<DenseMap<Attribute, Type>>
LLVM::LLVMArrayType::getSubelementIndexMap() const { … }

Type LLVM::LLVMArrayType::getTypeAtIndex(Attribute index) const { … }
llvm/mlir/lib/Dialect/LLVMIR/IR/LLVMMemorySlot.cpp
