08521abb3a
When the IfOp returns values, it can easily be obtained from one of the Values. However, when no values are returned, the information is lost. This revision lets the caller specify a capture IfOp* to return the produced IfOp. Differential Revision: https://reviews.llvm.org/D84025
117 lines
4.5 KiB
C++
117 lines
4.5 KiB
C++
//===- Builders.cpp - MLIR Declarative Builder Classes --------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Dialect/SCF/EDSC/Builders.h"
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#include "mlir/Dialect/SCF/SCF.h"
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#include "mlir/IR/AffineExpr.h"
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#include "mlir/IR/AffineMap.h"
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using namespace mlir;
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using namespace mlir::edsc;
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mlir::scf::ValueVector
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mlir::edsc::loopNestBuilder(ValueRange lbs, ValueRange ubs, ValueRange steps,
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function_ref<void(ValueRange)> fun) {
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// Delegates actual construction to scf::buildLoopNest by wrapping `fun` into
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// the expected function interface.
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assert(ScopedContext::getContext() && "EDSC ScopedContext not set up");
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return mlir::scf::buildLoopNest(
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ScopedContext::getBuilderRef(), ScopedContext::getLocation(), lbs, ubs,
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steps, [&](OpBuilder &builder, Location loc, ValueRange ivs) {
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ScopedContext context(builder, loc);
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if (fun)
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fun(ivs);
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});
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}
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mlir::scf::ValueVector
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mlir::edsc::loopNestBuilder(Value lb, Value ub, Value step,
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function_ref<void(Value)> fun) {
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// Delegates to the ValueRange-based version by wrapping the lambda.
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auto wrapper = [&](ValueRange ivs) {
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assert(ivs.size() == 1);
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if (fun)
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fun(ivs[0]);
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};
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return loopNestBuilder(ValueRange(lb), ValueRange(ub), ValueRange(step),
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wrapper);
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}
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mlir::scf::ValueVector mlir::edsc::loopNestBuilder(
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Value lb, Value ub, Value step, ValueRange iterArgInitValues,
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function_ref<scf::ValueVector(Value, ValueRange)> fun) {
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// Delegates actual construction to scf::buildLoopNest by wrapping `fun` into
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// the expected function interface.
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assert(ScopedContext::getContext() && "EDSC ScopedContext not set up");
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return mlir::scf::buildLoopNest(
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ScopedContext::getBuilderRef(), ScopedContext::getLocation(), lb, ub,
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step, iterArgInitValues,
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[&](OpBuilder &builder, Location loc, ValueRange ivs, ValueRange args) {
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assert(ivs.size() == 1 && "expected one induction variable");
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ScopedContext context(builder, loc);
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if (fun)
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return fun(ivs[0], args);
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return scf::ValueVector(iterArgInitValues.begin(),
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iterArgInitValues.end());
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});
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}
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static std::function<void(OpBuilder &, Location)>
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wrapIfBody(function_ref<scf::ValueVector()> body, TypeRange expectedTypes) {
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(void)expectedTypes;
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return [=](OpBuilder &builder, Location loc) {
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ScopedContext context(builder, loc);
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scf::ValueVector returned = body();
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assert(ValueRange(returned).getTypes() == expectedTypes &&
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"'if' body builder returned values of unexpected type");
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builder.create<scf::YieldOp>(loc, returned);
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};
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}
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ValueRange
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mlir::edsc::conditionBuilder(TypeRange results, Value condition,
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function_ref<scf::ValueVector()> thenBody,
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function_ref<scf::ValueVector()> elseBody,
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scf::IfOp *ifOp) {
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assert(ScopedContext::getContext() && "EDSC ScopedContext not set up");
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assert(thenBody && "thenBody is mandatory");
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auto newOp = ScopedContext::getBuilderRef().create<scf::IfOp>(
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ScopedContext::getLocation(), results, condition,
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wrapIfBody(thenBody, results), wrapIfBody(elseBody, results));
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if (ifOp)
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*ifOp = newOp;
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return newOp.getResults();
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}
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static std::function<void(OpBuilder &, Location)>
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wrapZeroResultIfBody(function_ref<void()> body) {
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return [=](OpBuilder &builder, Location loc) {
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ScopedContext context(builder, loc);
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body();
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builder.create<scf::YieldOp>(loc);
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};
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}
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ValueRange mlir::edsc::conditionBuilder(Value condition,
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function_ref<void()> thenBody,
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function_ref<void()> elseBody,
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scf::IfOp *ifOp) {
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assert(ScopedContext::getContext() && "EDSC ScopedContext not set up");
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assert(thenBody && "thenBody is mandatory");
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auto newOp = ScopedContext::getBuilderRef().create<scf::IfOp>(
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ScopedContext::getLocation(), condition, wrapZeroResultIfBody(thenBody),
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elseBody ? llvm::function_ref<void(OpBuilder &, Location)>(
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wrapZeroResultIfBody(elseBody))
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: llvm::function_ref<void(OpBuilder &, Location)>(nullptr));
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if (ifOp)
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*ifOp = newOp;
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return {};
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}
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