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[mlir][affine]make affine-loop-unroll a FunctionOpInterface pass. #126475

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Merged
merged 3 commits into from
Feb 13, 2025
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[mlir][affine]make affine-loop-unroll a FunctionOpInterface pass. #126475

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824b650
make affine-loop-unroll a FunctionOpInterface pass.
linuxlonelyeagle Feb 10, 2025
0861464
use InterfacePass implement it.
linuxlonelyeagle Feb 11, 2025
4383806
update c++ impl and update test.
linuxlonelyeagle Feb 13, 2025
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3 changes: 2 additions & 1 deletion mlir/include/mlir/Dialect/Affine/Passes.h
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,7 @@
#ifndef MLIR_DIALECT_AFFINE_PASSES_H
#define MLIR_DIALECT_AFFINE_PASSES_H

#include "mlir/Interfaces/FunctionInterfaces.h"
#include "mlir/Pass/Pass.h"
#include <limits>

Expand Down Expand Up @@ -93,7 +94,7 @@ std::unique_ptr<OperationPass<func::FuncOp>> createLoopTilingPass();
/// factors supplied through other means. If -1 is passed as the unrollFactor
/// and no callback is provided, anything passed from the command-line (if at
/// all) or the default unroll factor is used (LoopUnroll:kDefaultUnrollFactor).
std::unique_ptr<OperationPass<func::FuncOp>> createLoopUnrollPass(
std::unique_ptr<InterfacePass<FunctionOpInterface>> createLoopUnrollPass(
int unrollFactor = -1, bool unrollUpToFactor = false,
bool unrollFull = false,
const std::function<unsigned(AffineForOp)> &getUnrollFactor = nullptr);
Expand Down
2 changes: 1 addition & 1 deletion mlir/include/mlir/Dialect/Affine/Passes.td
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Expand Up @@ -199,7 +199,7 @@ def AffineLoopTiling : Pass<"affine-loop-tile", "func::FuncOp"> {
];
}

def AffineLoopUnroll : Pass<"affine-loop-unroll", "func::FuncOp"> {
def AffineLoopUnroll : InterfacePass<"affine-loop-unroll", "FunctionOpInterface"> {
let summary = "Unroll affine loops";
let constructor = "mlir::affine::createLoopUnrollPass()";
let options = [
Expand Down
11 changes: 6 additions & 5 deletions mlir/lib/Dialect/Affine/Transforms/LoopUnroll.cpp
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Expand Up @@ -82,7 +82,7 @@ static bool isInnermostAffineForOp(AffineForOp op) {
}

/// Gathers loops that have no affine.for's nested within.
static void gatherInnermostLoops(func::FuncOp f,
static void gatherInnermostLoops(FunctionOpInterface f,
SmallVectorImpl<AffineForOp> &loops) {
f.walk([&](AffineForOp forOp) {
if (isInnermostAffineForOp(forOp))
Expand All @@ -91,7 +91,7 @@ static void gatherInnermostLoops(func::FuncOp f,
}

void LoopUnroll::runOnOperation() {
func::FuncOp func = getOperation();
FunctionOpInterface func = getOperation();
if (func.isExternal())
return;

Expand All @@ -100,8 +100,8 @@ void LoopUnroll::runOnOperation() {
SmallVector<AffineForOp, 4> loops;

// Gathers all loops with trip count <= minTripCount. Do a post order walk
// so that loops are gathered from innermost to outermost (or else unrolling
// an outer one may delete gathered inner ones).
// so that loops are gathered from innermost to outermost (or else
// unrolling an outer one may delete gathered inner ones).
getOperation().walk([&](AffineForOp forOp) {
std::optional<uint64_t> tripCount = getConstantTripCount(forOp);
if (tripCount && *tripCount <= unrollFullThreshold)
Expand Down Expand Up @@ -145,7 +145,8 @@ LogicalResult LoopUnroll::runOnAffineForOp(AffineForOp forOp) {
cleanUpUnroll);
}

std::unique_ptr<OperationPass<func::FuncOp>> mlir::affine::createLoopUnrollPass(
std::unique_ptr<InterfacePass<FunctionOpInterface>>
mlir::affine::createLoopUnrollPass(
int unrollFactor, bool unrollUpToFactor, bool unrollFull,
const std::function<unsigned(AffineForOp)> &getUnrollFactor) {
return std::make_unique<LoopUnroll>(
Expand Down
28 changes: 23 additions & 5 deletions mlir/test/Dialect/Affine/unroll.mlir
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@@ -1,8 +1,9 @@
// RUN: mlir-opt -allow-unregistered-dialect %s -affine-loop-unroll="unroll-full" | FileCheck %s --check-prefix UNROLL-FULL
// RUN: mlir-opt -allow-unregistered-dialect %s -affine-loop-unroll="unroll-full unroll-full-threshold=2" | FileCheck %s --check-prefix SHORT
// RUN: mlir-opt -allow-unregistered-dialect %s -affine-loop-unroll="unroll-factor=4" | FileCheck %s --check-prefix UNROLL-BY-4
// RUN: mlir-opt -allow-unregistered-dialect %s -affine-loop-unroll="unroll-factor=1" | FileCheck %s --check-prefix UNROLL-BY-1
// RUN: mlir-opt -allow-unregistered-dialect %s -affine-loop-unroll="unroll-factor=5 cleanup-unroll=true" | FileCheck %s --check-prefix UNROLL-CLEANUP-LOOP
// RUN: mlir-opt -allow-unregistered-dialect %s -pass-pipeline="builtin.module(func.func(affine-loop-unroll{unroll-full=true}))" | FileCheck %s --check-prefix UNROLL-FULL
// RUN: mlir-opt -allow-unregistered-dialect %s -pass-pipeline="builtin.module(func.func(affine-loop-unroll{unroll-full=true unroll-full-threshold=2}))" | FileCheck %s --check-prefix SHORT
// RUN: mlir-opt -allow-unregistered-dialect %s -pass-pipeline="builtin.module(func.func(affine-loop-unroll{unroll-factor=4}))" | FileCheck %s --check-prefix UNROLL-BY-4
// RUN: mlir-opt -allow-unregistered-dialect %s -pass-pipeline="builtin.module(func.func(affine-loop-unroll{unroll-factor=1}))" | FileCheck %s --check-prefix UNROLL-BY-1
// RUN: mlir-opt -allow-unregistered-dialect %s -pass-pipeline="builtin.module(func.func(affine-loop-unroll{unroll-factor=5 cleanup-unroll=true}))" | FileCheck %s --check-prefix UNROLL-CLEANUP-LOOP
// RUN: mlir-opt -allow-unregistered-dialect %s -pass-pipeline="builtin.module(gpu.module(gpu.func(affine-loop-unroll{unroll-full=true})))" | FileCheck %s --check-prefix GPU-UNROLL-FULL

// UNROLL-FULL-DAG: [[$MAP0:#map[0-9]*]] = affine_map<(d0) -> (d0 + 1)>
// UNROLL-FULL-DAG: [[$MAP1:#map[0-9]*]] = affine_map<(d0) -> (d0 + 2)>
Expand Down Expand Up @@ -240,6 +241,23 @@ func.func @loop_nest_unroll_full() {
return
} // UNROLL-FULL }

gpu.module @unroll_full {
// GPU-UNROLL-FULL-LABEL: func @gpu_loop_nest_simplest() {
gpu.func @gpu_loop_nest_simplest() {
// GPU-UNROLL-FULL: affine.for %arg0 = 0 to 100 step 2 {
affine.for %i = 0 to 100 step 2 {
// GPU-UNROLL-FULL: %c1_i32 = arith.constant 1 : i32
// GPU-UNROLL-FULL-NEXT: %c1_i32_0 = arith.constant 1 : i32
// GPU-UNROLL-FULL-NEXT: %c1_i32_1 = arith.constant 1 : i32
// GPU-UNROLL-FULL-NEXT: %c1_i32_2 = arith.constant 1 : i32
affine.for %j = 0 to 4 {
%x = arith.constant 1 : i32
}
} // GPU-UNROLL-FULL: }
gpu.return // GPU-UNROLL-FULL: return
}
}

// SHORT-LABEL: func @loop_nest_outer_unroll() {
func.func @loop_nest_outer_unroll() {
// SHORT: affine.for %arg0 = 0 to 4 {
Expand Down
6 changes: 3 additions & 3 deletions mlir/test/Dialect/SCF/loop-unroll.mlir
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Expand Up @@ -3,9 +3,9 @@
// RUN: mlir-opt %s -test-loop-unrolling='unroll-factor=2 loop-depth=0' | FileCheck %s --check-prefix UNROLL-OUTER-BY-2
// RUN: mlir-opt %s -test-loop-unrolling='unroll-factor=2 loop-depth=1' | FileCheck %s --check-prefix UNROLL-INNER-BY-2
// RUN: mlir-opt %s -test-loop-unrolling='unroll-factor=2 annotate=true' | FileCheck %s --check-prefix UNROLL-BY-2-ANNOTATE
// RUN: mlir-opt %s --affine-loop-unroll='unroll-factor=6 unroll-up-to-factor=true' | FileCheck %s --check-prefix UNROLL-UP-TO
// RUN: mlir-opt %s --affine-loop-unroll='unroll-factor=5 cleanup-unroll=true' | FileCheck %s --check-prefix CLEANUP-UNROLL-BY-5
// RUN: mlir-opt %s --affine-loop-unroll --split-input-file | FileCheck %s
// RUN: mlir-opt %s -pass-pipeline="builtin.module(func.func(affine-loop-unroll{unroll-factor=6 unroll-up-to-factor=true}))" | FileCheck %s --check-prefix UNROLL-UP-TO
// RUN: mlir-opt %s -pass-pipeline="builtin.module(func.func(affine-loop-unroll{unroll-factor=5 cleanup-unroll=true}))" | FileCheck %s --check-prefix CLEANUP-UNROLL-BY-5
// RUN: mlir-opt %s -pass-pipeline="builtin.module(func.func(affine-loop-unroll))" --split-input-file | FileCheck %s

func.func @dynamic_loop_unroll(%arg0 : index, %arg1 : index, %arg2 : index,
%arg3: memref<?xf32>) {
Expand Down