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//===- Ops.cpp - Loop MLIR Operations -------------------------------------===//
//
// Copyright 2019 The MLIR Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// =============================================================================
#include "mlir/Dialect/LoopOps/LoopOps.h"
#include "mlir/IR/AffineExpr.h"
#include "mlir/IR/AffineMap.h"
#include "mlir/IR/Builders.h"
#include "mlir/IR/Function.h"
#include "mlir/IR/Matchers.h"
#include "mlir/IR/Module.h"
#include "mlir/IR/OpImplementation.h"
#include "mlir/IR/PatternMatch.h"
#include "mlir/IR/StandardTypes.h"
#include "mlir/IR/Value.h"
#include "mlir/StandardOps/Ops.h"
#include "mlir/Support/MathExtras.h"
#include "mlir/Support/STLExtras.h"
using namespace mlir;
using namespace mlir::loop;
//===----------------------------------------------------------------------===//
// LoopOpsDialect
//===----------------------------------------------------------------------===//
LoopOpsDialect::LoopOpsDialect(MLIRContext *context)
: Dialect(getDialectNamespace(), context) {
addOperations<
#define GET_OP_LIST
#include "mlir/Dialect/LoopOps/LoopOps.cpp.inc"
>();
}
//===----------------------------------------------------------------------===//
// ForOp
//===----------------------------------------------------------------------===//
void ForOp::build(Builder *builder, OperationState *result, Value *lb,
Value *ub, Value *step) {
result->addOperands({lb, ub, step});
Region *bodyRegion = result->addRegion();
ForOp::ensureTerminator(*bodyRegion, *builder, result->location);
bodyRegion->front().addArgument(builder->getIndexType());
}
LogicalResult verify(ForOp op) {
if (auto cst = dyn_cast_or_null<ConstantIndexOp>(op.step()->getDefiningOp()))
if (cst.getValue() <= 0)
return op.emitOpError("constant step operand must be nonnegative");
// Check that the body defines as single block argument for the induction
// variable.
auto *body = op.getBody();
if (body->getNumArguments() != 1 ||
!body->getArgument(0)->getType().isIndex())
return op.emitOpError("expected body to have a single index argument for "
"the induction variable");
return success();
}
static void print(OpAsmPrinter *p, ForOp op) {
*p << op.getOperationName() << " " << *op.getInductionVar() << " = "
<< *op.lowerBound() << " to " << *op.upperBound() << " step "
<< *op.step();
p->printRegion(op.region(),
/*printEntryBlockArgs=*/false,
/*printBlockTerminators=*/false);
p->printOptionalAttrDict(op.getAttrs());
}
static ParseResult parseForOp(OpAsmParser *parser, OperationState *result) {
auto &builder = parser->getBuilder();
OpAsmParser::OperandType inductionVariable, lb, ub, step;
// Parse the induction variable followed by '='.
if (parser->parseRegionArgument(inductionVariable) || parser->parseEqual())
return failure();
// Parse loop bounds.
Type indexType = builder.getIndexType();
if (parser->parseOperand(lb) ||
parser->resolveOperand(lb, indexType, result->operands) ||
parser->parseKeyword("to") || parser->parseOperand(ub) ||
parser->resolveOperand(ub, indexType, result->operands) ||
parser->parseKeyword("step") || parser->parseOperand(step) ||
parser->resolveOperand(step, indexType, result->operands))
return failure();
// Parse the body region.
Region *body = result->addRegion();
if (parser->parseRegion(*body, inductionVariable, indexType))
return failure();
ForOp::ensureTerminator(*body, builder, result->location);
// Parse the optional attribute list.
if (parser->parseOptionalAttributeDict(result->attributes))
return failure();
return success();
}
ForOp mlir::loop::getForInductionVarOwner(Value *val) {
auto *ivArg = dyn_cast<BlockArgument>(val);
if (!ivArg)
return ForOp();
assert(ivArg->getOwner() && "unlinked block argument");
auto *containingInst = ivArg->getOwner()->getParentOp();
return dyn_cast_or_null<ForOp>(containingInst);
}
//===----------------------------------------------------------------------===//
// IfOp
//===----------------------------------------------------------------------===//
void IfOp::build(Builder *builder, OperationState *result, Value *cond,
bool withElseRegion) {
result->addOperands(cond);
Region *thenRegion = result->addRegion();
Region *elseRegion = result->addRegion();
IfOp::ensureTerminator(*thenRegion, *builder, result->location);
if (withElseRegion)
IfOp::ensureTerminator(*elseRegion, *builder, result->location);
}
static LogicalResult verify(IfOp op) {
// Verify that the entry of each child region does not have arguments.
for (auto ®ion : op.getOperation()->getRegions()) {
if (region.empty())
continue;
for (auto &b : region)
if (b.getNumArguments() != 0)
return op.emitOpError(
"requires that child entry blocks have no arguments");
}
return success();
}
static ParseResult parseIfOp(OpAsmParser *parser, OperationState *result) {
// Create the regions for 'then'.
result->regions.reserve(2);
Region *thenRegion = result->addRegion();
Region *elseRegion = result->addRegion();
auto &builder = parser->getBuilder();
OpAsmParser::OperandType cond;
Type i1Type = builder.getIntegerType(1);
if (parser->parseOperand(cond) ||
parser->resolveOperand(cond, i1Type, result->operands))
return failure();
// Parse the 'then' region.
if (parser->parseRegion(*thenRegion, {}, {}))
return failure();
IfOp::ensureTerminator(*thenRegion, parser->getBuilder(), result->location);
// If we find an 'else' keyword then parse the 'else' region.
if (!parser->parseOptionalKeyword("else")) {
if (parser->parseRegion(*elseRegion, {}, {}))
return failure();
IfOp::ensureTerminator(*elseRegion, parser->getBuilder(), result->location);
}
// Parse the optional attribute list.
if (parser->parseOptionalAttributeDict(result->attributes))
return failure();
return success();
}
static void print(OpAsmPrinter *p, IfOp op) {
*p << IfOp::getOperationName() << " " << *op.condition();
p->printRegion(op.thenRegion(),
/*printEntryBlockArgs=*/false,
/*printBlockTerminators=*/false);
// Print the 'else' regions if it exists and has a block.
auto &elseRegion = op.elseRegion();
if (!elseRegion.empty()) {
*p << " else";
p->printRegion(elseRegion,
/*printEntryBlockArgs=*/false,
/*printBlockTerminators=*/false);
}
p->printOptionalAttrDict(op.getAttrs());
}
//===----------------------------------------------------------------------===//
// TableGen'd op method definitions
//===----------------------------------------------------------------------===//
#define GET_OP_CLASSES
#include "mlir/Dialect/LoopOps/LoopOps.cpp.inc"
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