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src Directory Reference

## Directories

| autoschedulers
| runtime

## Files

| AbstractGenerator.h
| AddAtomicMutex.h
| Defines the lowering pass that insert mutex allocation code & locks for the atomic nodes that require mutex locks.
| AddImageChecks.h
| Defines the lowering pass that adds the assertions that validate input and output buffers.
| AddParameterChecks.h
| Defines the lowering pass that adds the assertions that validate scalar parameters.
| AddSplitFactorChecks.h
| Defines the lowering pass that adds the assertions that all split factors are strictly positive.
| AlignLoads.h
| Defines a lowering pass that rewrites unaligned loads into sequences of aligned loads.
| AllocationBoundsInference.h
| Defines the lowering pass that determines how large internal allocations should be.
| ApplySplit.h
| Defines method that returns a list of let stmts, substitutions, and predicates to be added given a split schedule.
| Argument.h
| Defines a type used for expressing the type signature of a generated halide pipeline.
| AssociativeOpsTable.h
| Tables listing associative operators and their identities.
| Associativity.h
| Methods for extracting an associative operator from a Func's update definition if there is any and computing the identity of the associative operator.
| AsyncProducers.h
| Defines the lowering pass that injects task parallelism for producers that are scheduled as async.
| AutoScheduleUtils.h
| Defines util functions that used by auto scheduler.
| BoundaryConditions.h
| Support for imposing boundary conditions on Halide::Funcs.
| BoundConstantExtentLoops.h
| Defines the lowering pass that enforces a constant extent on all vectorized or unrolled loops.
| Bounds.h
| Methods for computing the upper and lower bounds of an expression, and the regions of a function read or written by a statement.
| BoundsInference.h
| Defines the bounds_inference lowering pass.
| BoundSmallAllocations.h
| Defines the lowering pass that attempts to rewrite small allocations to have constant size.
| Buffer.h
| Callable.h
| Defines the front-end class representing a jitted, callable Halide pipeline.
| CanonicalizeGPUVars.h
| Defines the lowering pass that canonicalize the GPU var names over.
| ClampUnsafeAccesses.h
| Defines the clamp_unsafe_accesses lowering pass.
| Closure.h
| Provides Closure class.
| CodeGen_C.h
| Defines an IRPrinter that emits C++ code equivalent to a halide stmt.
| CodeGen_D3D12Compute_Dev.h
| Defines the code-generator for producing D3D12-compatible HLSL kernel code.
| CodeGen_GPU_Dev.h
| Defines the code-generator interface for producing GPU device code.
| CodeGen_Internal.h
| Defines functionality that's useful to multiple target-specific CodeGen paths, but shouldn't live in CodeGen_LLVM.h (because that's the front-end-facing interface to CodeGen).
| CodeGen_LLVM.h
| Defines the base-class for all architecture-specific code generators that use llvm.
| CodeGen_Metal_Dev.h
| Defines the code-generator for producing Apple Metal shading language kernel code.
| CodeGen_OpenCL_Dev.h
| Defines the code-generator for producing OpenCL C kernel code.
| CodeGen_Posix.h
| Defines a base-class for code-generators on posixy cpu platforms.
| CodeGen_PTX_Dev.h
| Defines the code-generator for producing CUDA host code.
| CodeGen_PyTorch.h
| Defines an IRPrinter that emits C++ code that:
| CodeGen_Targets.h
| Provides constructors for code generators for various targets.
| CodeGen_Vulkan_Dev.h
| Defines the code-generator for producing SPIR-V binary modules for use with the Vulkan runtime.
| CodeGen_WebGPU_Dev.h
| Defines the code-generator for producing WebGPU shader code (WGSL).
| CompilerLogger.h
| Defines an interface used to gather and log compile-time information, stats, etc for use in evaluating internal Halide compilation rules and efficiency.
| ConciseCasts.h
| Defines concise cast and saturating cast operators to make it easier to read cast-heavy code.
| ConstantBounds.h
| Methods for computing compile-time constant int64_t upper and lower bounds of an expression.
| ConstantInterval.h
| Defines the ConstantInterval class, and operators on it.
| CPlusPlusMangle.h
| A simple function to get a C++ mangled function name for a function.
| CSE.h
| Defines a pass for introducing let expressions to wrap common sub-expressions.
| Debug.h
| Defines functions for debug logging during code generation.
| DebugArguments.h
| Defines a lowering pass that injects debug statements inside a LoweredFunc.
| DebugToFile.h
| Defines the lowering pass that injects code at the end of every realization to dump functions to a file for debugging.
| Definition.h
| Defines the internal representation of a halide function's definition and related classes.
| Deinterleave.h
| Defines methods for splitting up a vector into the even lanes and the odd lanes.
| Derivative.h
| Automatic differentiation.
| DerivativeUtils.h
| Deserialization.h
| DeviceAPI.h
| Defines DeviceAPI.
| DeviceArgument.h
| Defines helpers for passing arguments to separate devices, such as GPUs.
| DeviceInterface.h
| Methods for managing device allocations when jitting.
| Dimension.h
| Defines the Dimension utility class for Halide pipelines.
| DistributeShifts.h
| A tool to distribute shifts as multiplies, useful for some backends.
| EarlyFree.h
| Defines the lowering pass that injects markers just after the last use of each buffer so that they can potentially be freed earlier.
| Elf.h
| EliminateBoolVectors.h
| Method to eliminate vectors of booleans from IR.
| EmulateFloat16Math.h
| Methods for dealing with float16 arithmetic using float32 math, by casting back and forth with bit tricks.
| Error.h
| Expr.h
| Base classes for Halide expressions (Halide::Expr) and statements (Halide::Internal::Stmt).
| ExprUsesVar.h
| Defines a method to determine if an expression depends on some variables.
| Extern.h
| Convenience macros that lift functions that take C types into functions that take and return exprs, and call the original function at runtime under the hood.
| ExternFuncArgument.h
| Defines the internal representation of a halide ExternFuncArgument.
| ExtractTileOperations.h
| Defines the lowering pass that injects calls to tile intrinsics that support AMX instructions.
| FastIntegerDivide.h
| FindCalls.h
| Defines analyses to extract the functions called a function.
| FindIntrinsics.h
| Tools to replace common patterns with more readily recognizable intrinsics.
| FlattenNestedRamps.h
| Defines the lowering pass that flattens nested ramps and broadcasts.
| Float16.h
| Func.h
| Defines Func - the front-end handle on a halide function, and related classes.
| Function.h
| Defines the internal representation of a halide function and related classes.
| FunctionPtr.h
| FuseGPUThreadLoops.h
| Defines the lowering pass that fuses and normalizes loops over gpu threads to target CUDA, OpenCL, and Metal.
| FuzzFloatStores.h
| Defines a lowering pass that messes with floating point stores.
| Generator.h
| Generator is a class used to encapsulate the building of Funcs in user pipelines.
| HexagonAlignment.h
| Class for analyzing Alignment of loads and stores for Hexagon.
| HexagonOffload.h
| Defines a lowering pass to pull loops marked with the Hexagon device API to a separate module, and call them through the Hexagon host runtime module.
| HexagonOptimize.h
| Tools for optimizing IR for Hexagon.
| ImageParam.h
| Classes for declaring image parameters to halide pipelines.
| InferArguments.h
| Interface for a visitor to infer arguments used in a body Stmt.
| InjectHostDevBufferCopies.h
| Defines the lowering passes that deal with host and device buffer flow.
| Inline.h
| Methods for replacing calls to functions with their definitions.
| InlineReductions.h
| Defines some inline reductions: sum, product, minimum, maximum.
| IntegerDivisionTable.h
| Tables telling us how to do integer division via fixed-point multiplication for various small constants.
| Interval.h
| Defines the Interval class.
| IntrusivePtr.h
| Support classes for reference-counting via intrusive shared pointers.
| IR.h
| Subtypes for Halide expressions (Halide::Expr) and statements (Halide::Internal::Stmt).
| IREquality.h
| Methods to test Exprs and Stmts for equality of value.
| IRMatch.h
| Defines a method to match a fragment of IR against a pattern containing wildcards.
| IRMutator.h
| Defines a base class for passes over the IR that modify it.
| IROperator.h
| Defines various operator overloads and utility functions that make it more pleasant to work with Halide expressions.
| IRPrinter.h
| This header file defines operators that let you dump a Halide expression, statement, or type directly into an output stream in a human readable form.
| IRVisitor.h
| Defines the base class for things that recursively walk over the IR.
| JITModule.h
| Defines the struct representing lifetime and dependencies of a JIT compiled halide pipeline.
| Lambda.h
| Convenience functions for creating small anonymous Halide functions.
| Lerp.h
| Defines methods for converting a lerp intrinsic into Halide IR.
| LICM.h
| Methods for lifting loop invariants out of inner loops.
| LLVM_Headers.h
| LLVM_Output.h
| LLVM_Runtime_Linker.h
| Support for linking LLVM modules that comprise the runtime.
| LoopCarry.h
| LoopPartitioningDirective.h
| Defines the Partition enum.
| Lower.h
| Defines the function that generates a statement that computes a Halide function using its schedule.
| LowerParallelTasks.h
| Support for platform independent lowering of Halide parallel and async mechanisms.
| LowerWarpShuffles.h
| Defines the lowering pass that injects CUDA warp shuffle instructions to access storage outside of a GPULane loop.
| MainPage.h
| This file only exists to contain the front-page of the documentation.
| Memoization.h
| Defines the interface to the pass that injects support for compute_cached roots.
| Module.h
| Defines Module, an IR container that fully describes a Halide program.
| ModulusRemainder.h
| Routines for statically determining what expressions are divisible by.
| Monotonic.h
| Methods for computing whether expressions are monotonic.
| ObjectInstanceRegistry.h
| Provides a single global registry of Generators, GeneratorParams, and Params indexed by this pointer.
| OffloadGPULoops.h
| Defines a lowering pass to pull loops marked with GPU device APIs to a separate module, and call them through the appropriate host runtime module.
| OptimizeShuffles.h
| Defines a lowering pass that replace indirect loads with dynamic_shuffle intrinsics where possible.
| OutputImageParam.h
| Classes for declaring output image parameters to halide pipelines.
| ParallelRVar.h
| Method for checking if it's safe to parallelize an update definition across a reduction variable.
| Param.h
| Classes for declaring scalar parameters to halide pipelines.
| Parameter.h
| Defines the internal representation of parameters to halide piplines.
| PartitionLoops.h
| Defines a lowering pass that partitions loop bodies into three to handle boundary conditions: A prologue, a simplified steady-stage, and an epilogue.
| Pipeline.h
| Defines the front-end class representing an entire Halide imaging pipeline.
| Prefetch.h
| Defines the lowering pass that injects prefetch calls when prefetching appears in the schedule.
| PrefetchDirective.h
| Defines the PrefetchDirective struct.
| PrintLoopNest.h
| Defines methods to print out the loop nest corresponding to a schedule.
| Profiling.h
| Defines the lowering pass that injects print statements when profiling is turned on.
| PurifyIndexMath.h
| Removes side-effects in integer math.
| PythonExtensionGen.h
| Qualify.h
| Defines methods for prefixing names in an expression with a prefix string.
| Random.h
| Defines deterministic random functions, and methods to redirect front-end calls to random_float and random_int to use them.
| RDom.h
| Defines the front-end syntax for reduction domains and reduction variables.
| Realization.h
| Defines Realization - a vector of Buffer for use in pipelines with multiple outputs.
| RealizationOrder.h
| Defines the lowering pass that determines the order in which realizations are injected and groups functions with fused computation loops.
| RebaseLoopsToZero.h
| Defines the lowering pass that rewrites loop mins to be 0.
| Reduction.h
| Defines internal classes related to Reduction Domains.
| RegionCosts.h
| Defines RegionCosts - used by the auto scheduler to query the cost of computing some function regions.
| RemoveDeadAllocations.h
| Defines the lowering pass that removes allocate and free nodes that are not used.
| RemoveExternLoops.h
| Defines a lowering pass that removes placeholder loops for extern stages.
| RemoveUndef.h
| Defines a lowering pass that elides stores that depend on unitialized values.
| Schedule.h
| Defines the internal representation of the schedule for a function.
| ScheduleFunctions.h
| Defines the function that does initial lowering of Halide Functions into a loop nest using its schedule.
| Scope.h
| Defines the Scope class, which is used for keeping track of names in a scope while traversing IR.
| SelectGPUAPI.h
| Defines a lowering pass that selects which GPU api to use for each gpu for loop.
| Serialization.h
| Simplify.h
| Methods for simplifying halide statements and expressions.
| Simplify_Internal.h
| The simplifier is separated into multiple compilation units with this single shared header to speed up the build.
| SimplifyCorrelatedDifferences.h
| Defines a simplification pass for handling differences of correlated expressions.
| SimplifySpecializations.h
| Defines pass that try to simplify the RHS/LHS of a function's definition based on its specializations.
| SkipStages.h
| Defines a pass that dynamically avoids realizing unnecessary stages.
| SlidingWindow.h
| Defines the sliding_window lowering optimization pass, which avoids computing provably-already-computed values.
| Solve.h
| SpirvIR.h
| Defines methods for constructing and encoding instructions into the Khronos format specification known as the Standard Portable Intermediate Representation for Vulkan (SPIR-V).
| SplitTuples.h
| Defines the lowering pass that breaks up Tuple-valued realization and productions into several scalar-valued ones.
| StageStridedLoads.h
| Defines the compiler pass that converts strided loads into dense loads followed by shuffles.
| StmtToHTML.h
| Defines a function to dump an HTML-formatted visualization to a file.
| StorageFlattening.h
| Defines the lowering pass that flattens multi-dimensional storage into single-dimensional array access.
| StorageFolding.h
| Defines the lowering optimization pass that reduces large buffers down to smaller circular buffers when possible.
| StrictifyFloat.h
| Defines a lowering pass to make all floating-point strict for all top-level Exprs.
| StripAsserts.h
| Defines the lowering pass that strips asserts when NoAsserts is set.
| Substitute.h
| Defines methods for substituting out variables in expressions and statements.
| Target.h
| Defines the structure that describes a Halide target.
| TargetQueryOps.h
| Defines a lowering pass to lower all target_is() and target_has() helpers.
| Tracing.h
| Defines the lowering pass that injects print statements when tracing is turned on.
| TrimNoOps.h
| Defines a lowering pass that truncates loops to the region over which they actually do something.
| Tuple.h
| Defines Tuple - the front-end handle on small arrays of expressions.
| Type.h
| Defines halide types.
| UnifyDuplicateLets.h
| Defines the lowering pass that coalesces redundant let statements.
| UniquifyVariableNames.h
| Defines the lowering pass that renames all variables to have unique names.
| UnpackBuffers.h
| Defines the lowering pass that unpacks buffer arguments onto the symbol table.
| UnrollLoops.h
| Defines the lowering pass that unrolls loops marked as such.
| UnsafePromises.h
| Defines the lowering pass that removes unsafe promises.
| Util.h
| Various utility functions used internally Halide.
| Var.h
| Defines the Var - the front-end variable.
| VectorizeLoops.h
| Defines the lowering pass that vectorizes loops marked as such.
| WasmExecutor.h
| Support for running Halide-compiled Wasm code in-process.
| WrapCalls.h
| Defines pass to replace calls to wrapped Functions with their wrappers.