BufferDeallocationSimplification.cpp File Reference

#include "mlir/Dialect/Bufferization/IR/Bufferization.h"
#include "mlir/Dialect/Bufferization/Transforms/BufferViewFlowAnalysis.h"
#include "mlir/Dialect/Bufferization/Transforms/Passes.h"
#include "mlir/Dialect/Func/IR/FuncOps.h"
#include "mlir/Dialect/MemRef/IR/MemRef.h"
#include "mlir/IR/Matchers.h"
#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
#include "mlir/Dialect/Bufferization/Transforms/Passes.h.inc"

Go to the source code of this file.

Namespaces
	mlir
	Include the generated interface declarations.
	mlir::bufferization

Macros
#define	GEN_PASS_DEF_BUFFERDEALLOCATIONSIMPLIFICATION

Functions
static Value	getViewBase (Value value)
	Given a memref value, return the "base" value by skipping over all ViewLikeOpInterface ops (if any) in the reverse use-def chain. More...
static LogicalResult	updateDeallocIfChanged (DeallocOp deallocOp, ValueRange memrefs, ValueRange conditions, PatternRewriter &rewriter)
static bool	distinctAllocAndBlockArgument (Value v1, Value v2)
	Return "true" if the given values are guaranteed to be different (and non-aliasing) allocations based on the fact that one value is the result of an allocation and the other value is a block argument of a parent block. More...
static bool	potentiallyAliasesMemref (BufferOriginAnalysis &analysis, ValueRange otherList, Value memref)
	Checks if memref may potentially alias a MemRef in otherList. More...

Macro Definition Documentation

GEN_PASS_DEF_BUFFERDEALLOCATIONSIMPLIFICATION

#define GEN_PASS_DEF_BUFFERDEALLOCATIONSIMPLIFICATION

Definition at line 25 of file BufferDeallocationSimplification.cpp.

Function Documentation

distinctAllocAndBlockArgument()

static bool distinctAllocAndBlockArgument ( Value  v1, Value  v2  )

static

Return "true" if the given values are guaranteed to be different (and non-aliasing) allocations based on the fact that one value is the result of an allocation and the other value is a block argument of a parent block.

Note: This is a best-effort analysis that will eventually be replaced by a proper "is same allocation" analysis. This function may return "false" even though the two values are distinct allocations.

Definition at line 66 of file BufferDeallocationSimplification.cpp.

References mlir::Value::getDefiningOp(), and getViewBase().

Referenced by potentiallyAliasesMemref().

getViewBase()

static Value getViewBase ( Value  value )

static

Given a memref value, return the "base" value by skipping over all ViewLikeOpInterface ops (if any) in the reverse use-def chain.

Definition at line 39 of file BufferDeallocationSimplification.cpp.

References mlir::Value::getDefiningOp().

Referenced by distinctAllocAndBlockArgument().

potentiallyAliasesMemref()

static bool potentiallyAliasesMemref ( BufferOriginAnalysis &  analysis, ValueRange  otherList, Value  memref  )

static

Checks if memref may potentially alias a MemRef in otherList.

It is often a requirement of optimization patterns that there cannot be any aliasing memref in order to perform the desired simplification.

Definition at line 83 of file BufferDeallocationSimplification.cpp.

References distinctAllocAndBlockArgument(), and mlir::BufferOriginAnalysis::isSameAllocation().

updateDeallocIfChanged()

static LogicalResult updateDeallocIfChanged ( DeallocOp  deallocOp, ValueRange  memrefs, ValueRange  conditions, PatternRewriter &  rewriter  )

static

Definition at line 45 of file BufferDeallocationSimplification.cpp.

References mlir::RewriterBase::modifyOpInPlace().