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Integrate LLVM at llvm/llvm-project@fd0c6f53913f
Updates LLVM usage to match [fd0c6f53913f](llvm/llvm-project@fd0c6f53913f) PiperOrigin-RevId: 423461771 Change-Id: I053cc1ae6c55aea3de63fd1afccdfca97f2f7ac3
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tensorflow/compiler/mlir/hlo/lib/Dialect/disc-ral/transforms/ral_inject_execution_context.cc
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| /* Copyright 2021 The TensorFlow Authors. All Rights Reserved. | ||
| 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. | ||
| ==============================================================================*/ | ||
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| // This file implements logic for injecting execution context to the entry | ||
| // function. | ||
| // | ||
| // Below is an example. Before Conversion: | ||
| // ``` | ||
| // func @main(%arg0: memref<?x?xf32>, %arg1: memref<?x?xf32>) -> | ||
| // memref<?x?xf32> { | ||
| // %0 = memref.alloc(...) | ||
| // "lmhlo.add"(%arg0, %arg1, %0) : (memref<?x?xf32>, memref<?x?xf32>, | ||
| // memref<?x?xf32>) -> memref<?x?xf32> return %0 : memref<?x?xf32> | ||
| // } | ||
| // ``` | ||
| // After conversion: | ||
| // ``` | ||
| // func @main(%ctx: !disc_ral.context) { | ||
| // %c0 = arith.constant 0 : index | ||
| // %c1 = arith.constant 1 : index | ||
| // "disc_ral.recv_input"(%ctx, %c0) : (!disc_ral.context, index) -> | ||
| // memref<?x?xf32> "disc_ral.recv_input"(%ctx, %c1) : (!disc_ral.context, | ||
| // index) -> memref<?x?xf32> %0 = memref.alloc(...) "lmhlo.add"(%arg0, | ||
| // %arg1, %0) : (memref<?x?xf32>, memref<?x?xf32>, memref<?x?xf32>) -> | ||
| // memref<?x?xf32> "disc_ral.send_output"(%ctx, %c0, %0) : | ||
| // (!disc_ral.context, index, memref<?x?xf32>) -> () | ||
| // } | ||
| // ``` | ||
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| // 1. rewrite entry function (supposed that no other function directly calls the | ||
| // entry function) | ||
| // - function signature rewrite | ||
| // - return-like ops rewrite. | ||
| // 2. Currently we suppose that functions except the entry function are inlined | ||
| // to the entry function. Thus, we don't rewrite all call ops and other | ||
| // functions a.t.m. Re-visit this assumption if necessary. | ||
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| #include "mlir-hlo/Dialect/disc-ral/IR/disc_ral_ops.h" | ||
| #include "mlir-hlo/Dialect/disc-ral/transforms/PassDetail.h" | ||
| #include "mlir/Dialect/StandardOps/IR/Ops.h" | ||
| #include "mlir/IR/Attributes.h" | ||
| #include "mlir/IR/Builders.h" | ||
| #include "mlir/IR/BuiltinOps.h" | ||
| #include "mlir/IR/BuiltinTypes.h" | ||
| #include "mlir/IR/Location.h" | ||
| #include "mlir/IR/MLIRContext.h" | ||
| #include "mlir/IR/Operation.h" | ||
| #include "mlir/Pass/Pass.h" | ||
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| namespace mlir { | ||
| namespace disc_ral { | ||
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| namespace { | ||
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| struct RalInjectExecutionContextPass | ||
| : public RalInjectExecutionContextPassBase<RalInjectExecutionContextPass> { | ||
| explicit RalInjectExecutionContextPass(const std::string& entry_func_name) | ||
| : RalInjectExecutionContextPassBase<RalInjectExecutionContextPass>:: | ||
| RalInjectExecutionContextPassBase() { | ||
| this->entry_func_name_ = entry_func_name; | ||
| } | ||
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| void getDependentDialects(DialectRegistry& registry) const override { | ||
| registry.insert<RalDialect>(); | ||
| } | ||
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| void runOnOperation() override { | ||
| ModuleOp m = getOperation(); | ||
| FuncOp main = m.lookupSymbol<FuncOp>(entry_func_name_); | ||
| if (!main) { | ||
| m.emitError("entry func: " + entry_func_name_ + " not found"); | ||
| signalPassFailure(); | ||
| } | ||
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| Location loc = main.getLoc(); | ||
| FunctionType funcType = main.getType(); | ||
| OpBuilder b(&main.getBody()); | ||
| Block* entry_block = &main.getBody().front(); | ||
| Type ctx_type = RalExecutionContextType::get(b.getContext()); | ||
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| // 1. Prepend context to the entry block arguments | ||
| Value ctx = entry_block->insertArgument(0u, ctx_type, loc); | ||
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| // 2. remap original arguments to recv_input ops | ||
| for (auto&& en : llvm::enumerate( | ||
| llvm::zip(funcType.getInputs(), | ||
| entry_block->getArguments().drop_front(1)))) { | ||
| Value idx = b.create<arith::ConstantIndexOp>(loc, en.index()); | ||
| Type argType = std::get<0>(en.value()); | ||
| Value oldArgument = std::get<1>(en.value()); | ||
| Value newInput = b.create<RecvInputOp>(loc, argType, ctx, idx); | ||
| oldArgument.replaceAllUsesWith(newInput); | ||
| } | ||
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| // 3. remap all return-like ops to send_output ops | ||
| for (auto& block : main.getBody()) { | ||
| if (block.empty()) continue; | ||
| Operation& operation = block.back(); | ||
| if (!operation.hasTrait<OpTrait::ReturnLike>()) continue; | ||
| b.setInsertionPoint(&operation); | ||
| for (auto& en : llvm::enumerate(operation.getOperands())) { | ||
| Value idx = b.create<arith::ConstantIndexOp>(loc, en.index()); | ||
| b.create<SendOutputOp>(loc, ctx, idx, en.value()); | ||
| } | ||
| operation.eraseOperands(0, operation.getNumOperands()); | ||
| } | ||
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| // 4. remove unused block arguments of entry block | ||
| for (int i = 0, e = funcType.getInputs().size(); i < e; ++i) { | ||
| // continue to remove the 1st (starting from zero) argument | ||
| entry_block->eraseArgument(1); | ||
| } | ||
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| // 5. set entry func to new type | ||
| main.setType(b.getFunctionType({ctx_type}, {})); | ||
| } | ||
| }; | ||
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| } // namespace | ||
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| std::unique_ptr<OperationPass<ModuleOp>> createRalInjectExecutionContextPass( | ||
| const std::string& entry_func_name) { | ||
| return std::make_unique<RalInjectExecutionContextPass>(entry_func_name); | ||
| } | ||
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| } // namespace disc_ral | ||
| } // namespace mlir |
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