de907d8746
Another big change here is changing the use of this flag to use the value in the HloModule and not the global environment variable which was bad temporary behavior. PiperOrigin-RevId: 316844057 Change-Id: I995715ccc9009e9845fca77060b835fdc50fb4d2
272 lines
12 KiB
C++
272 lines
12 KiB
C++
/* Copyright 2017 The TensorFlow Authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#ifndef TENSORFLOW_COMPILER_XLA_SERVICE_ELEMENTAL_IR_EMITTER_H_
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#define TENSORFLOW_COMPILER_XLA_SERVICE_ELEMENTAL_IR_EMITTER_H_
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#include <unordered_map>
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#include <vector>
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#include "absl/strings/string_view.h"
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#include "absl/types/span.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Value.h"
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#include "tensorflow/compiler/xla/service/hlo_instruction.h"
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#include "tensorflow/compiler/xla/service/hlo_instructions.h"
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#include "tensorflow/compiler/xla/service/hlo_module_config.h"
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#include "tensorflow/compiler/xla/service/llvm_ir/ir_array.h"
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#include "tensorflow/compiler/xla/service/llvm_ir/ir_builder_mixin.h"
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#include "tensorflow/compiler/xla/service/llvm_ir/loop_emitter.h"
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#include "tensorflow/compiler/xla/statusor.h"
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namespace xla {
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class ElementalIrEmitter : public IrBuilderMixin<ElementalIrEmitter> {
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public:
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using HloToElementGeneratorMap =
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std::unordered_map<const HloInstruction*, llvm_ir::ElementGenerator>;
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ElementalIrEmitter(const HloModuleConfig& hlo_module_config,
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llvm::Module* module, llvm::IRBuilder<>* b)
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: b_(b), module_(module), hlo_module_config_(hlo_module_config) {}
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virtual ~ElementalIrEmitter() = default;
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virtual StatusOr<llvm::Value*> EmitUnaryOp(const HloInstruction* op,
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llvm::Value* operand_value);
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virtual StatusOr<llvm::Value*> EmitBinaryOp(const HloInstruction* op,
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llvm::Value* lhs_value,
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llvm::Value* rhs_value);
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// Returns a function to generate an element of the output of `hlo`, given a
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// map of functions to generate elements of its operands.
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virtual llvm_ir::ElementGenerator MakeElementGenerator(
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const HloInstruction* hlo,
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const HloToElementGeneratorMap& operand_to_generator);
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llvm::IRBuilder<>* b() { return b_; }
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// builder() is for IrBuilderMixin.
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llvm::IRBuilder<>* builder() { return b_; }
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llvm::Module* module() { return module_; }
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protected:
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virtual StatusOr<llvm::Value*> EmitIntegerUnaryOp(const HloInstruction* op,
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llvm::Value* operand_value);
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virtual StatusOr<llvm::Value*> EmitFloatUnaryOp(const HloInstruction* op,
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llvm::Value* operand_value);
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virtual StatusOr<llvm::Value*> EmitComplexUnaryOp(const HloInstruction* op,
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llvm::Value* operand_value);
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llvm::Value* IsZero(llvm::Value* v);
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llvm::Value* IsIntMinDivisionOverflow(llvm::Value* lhs, llvm::Value* rhs);
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llvm::Value* GetZero(llvm::Type* type);
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llvm::Value* GetOne(llvm::Type* type);
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llvm::Value* GetIntSMin(llvm::Type* type);
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llvm::Value* GetMinusOne(llvm::Type* type);
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llvm::Value* EmitIntegerDivide(llvm::Value* lhs, llvm::Value* rhs,
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bool is_signed);
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llvm::Value* EmitIntegerRemainder(llvm::Value* lhs, llvm::Value* rhs,
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bool is_signed);
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virtual StatusOr<llvm::Value*> EmitIntegerBinaryOp(const HloInstruction* op,
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llvm::Value* lhs_value,
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llvm::Value* rhs_value,
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bool is_signed);
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virtual StatusOr<llvm::Value*> EmitFloatBinaryOp(const HloInstruction* op,
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llvm::Value* lhs_value,
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llvm::Value* rhs_value);
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virtual StatusOr<llvm::Value*> EmitComplexBinaryOp(const HloInstruction* op,
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llvm::Value* lhs_value,
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llvm::Value* rhs_value);
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virtual llvm::Value* EmitFloatMax(llvm::Value* lhs_value,
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llvm::Value* rhs_value);
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virtual llvm::Value* EmitFloatMin(llvm::Value* lhs_value,
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llvm::Value* rhs_value);
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llvm::Value* EmitIntegralMax(llvm::Value* lhs_value, llvm::Value* rhs_value,
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bool is_signed);
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llvm::Value* EmitIntegralMin(llvm::Value* lhs_value, llvm::Value* rhs_value,
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bool is_signed);
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virtual StatusOr<llvm::Value*> EmitAtan2(PrimitiveType prim_type,
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llvm::Value* lhs, llvm::Value* rhs);
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virtual StatusOr<llvm::Value*> EmitLog(PrimitiveType prim_type,
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llvm::Value* value);
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virtual StatusOr<llvm::Value*> EmitSqrt(PrimitiveType prim_type,
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llvm::Value* value);
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virtual StatusOr<llvm::Value*> EmitCbrt(PrimitiveType prim_type,
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llvm::Value* value);
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virtual StatusOr<llvm::Value*> EmitRsqrt(PrimitiveType prim_type,
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llvm::Value* value);
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virtual StatusOr<llvm::Value*> EmitLog1p(PrimitiveType prim_type,
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llvm::Value* value);
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virtual StatusOr<llvm::Value*> EmitSin(PrimitiveType prim_type,
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llvm::Value* value);
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virtual StatusOr<llvm::Value*> EmitCos(PrimitiveType prim_type,
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llvm::Value* value);
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virtual StatusOr<llvm::Value*> EmitExp(PrimitiveType prim_type,
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llvm::Value* value);
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virtual StatusOr<llvm::Value*> EmitExpm1(PrimitiveType prim_type,
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llvm::Value* value);
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virtual StatusOr<llvm::Value*> EmitPow(PrimitiveType prim_type,
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llvm::Value* lhs, llvm::Value* rhs);
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virtual StatusOr<llvm::Value*> EmitTanh(PrimitiveType prim_type,
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llvm::Value* value);
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virtual StatusOr<llvm::Value*> EmitReducePrecision(const HloInstruction* hlo,
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llvm::Value* x);
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virtual StatusOr<std::tuple<llvm::Value*, llvm::Value*, llvm::Value*>>
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EmitComplexAbsHelper(PrimitiveType prim_type, llvm::Value* operand_value,
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bool return_sqrt);
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virtual StatusOr<llvm::Value*> EmitComplexAbs(PrimitiveType prim_type,
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llvm::Value* operand_value);
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virtual StatusOr<llvm::Value*> EmitSqrtComplexAbs(PrimitiveType prim_type,
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llvm::Value* operand_value);
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virtual StatusOr<llvm::Value*> EmitRsqrtComplexAbs(
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PrimitiveType prim_type, llvm::Value* operand_value);
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virtual StatusOr<llvm::Value*> EmitComplexSqrt(const HloInstruction* op,
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PrimitiveType prim_type,
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llvm::Value* operand_value);
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virtual StatusOr<llvm::Value*> EmitComplexCbrt(const HloInstruction* op,
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PrimitiveType prim_type,
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llvm::Value* operand_value);
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virtual StatusOr<llvm::Value*> EmitComplexRsqrt(const HloInstruction* op,
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PrimitiveType prim_type,
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llvm::Value* operand_value);
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virtual llvm::Value* EmitExtractReal(llvm::Value* value);
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virtual llvm::Value* EmitExtractImag(llvm::Value* value);
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// Composes a complex struct. imag may be nullptr for simple cast operations.
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llvm::Value* EmitComposeComplex(const HloInstruction* op, llvm::Value* real,
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llvm::Value* imag);
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// Identifier of the thread unique among all threads on the device
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virtual llvm::Value* EmitThreadId() { return b_->getIntN(128, 0); }
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StatusOr<llvm::Value*> EmitElementalSelect(
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const HloInstruction* hlo,
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const HloToElementGeneratorMap& operand_to_generator,
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const llvm_ir::IrArray::Index& index);
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StatusOr<llvm::Value*> EmitElementalClamp(
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const HloInstruction* hlo,
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const HloToElementGeneratorMap& operand_to_generator,
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const llvm_ir::IrArray::Index& index);
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StatusOr<llvm::Value*> EmitElementalConcatenate(
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const HloInstruction* hlo,
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const HloToElementGeneratorMap& operand_to_generator,
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const llvm_ir::IrArray::Index& target_index);
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StatusOr<llvm::Value*> EmitElementalDynamicSlice(
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const HloInstruction* hlo,
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const HloToElementGeneratorMap& operand_to_generator,
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const llvm_ir::IrArray::Index& index);
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StatusOr<llvm::Value*> EmitElementalGather(
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const HloInstruction* hlo,
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const HloToElementGeneratorMap& operand_to_generator,
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const llvm_ir::IrArray::Index& index);
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StatusOr<llvm::Value*> EmitElementalDynamicUpdateSlice(
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const HloInstruction* hlo,
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const HloToElementGeneratorMap& operand_to_generator,
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const llvm_ir::IrArray::Index& index);
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StatusOr<llvm::Value*> EmitElementalPad(
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const HloInstruction* hlo,
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const HloToElementGeneratorMap& operand_to_generator,
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const llvm_ir::IrArray::Index& padded_index);
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StatusOr<llvm::Value*> EmitElementalDot(
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const HloInstruction* hlo,
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const HloToElementGeneratorMap& operand_to_generator,
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const llvm_ir::IrArray::Index& dot_result_index);
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virtual StatusOr<std::vector<llvm::Value*>> EmitThreadLocalCall(
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const HloComputation& callee, absl::Span<llvm::Value* const> parameters,
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absl::string_view name) = 0;
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StatusOr<llvm::Value*> EmitElementalMap(
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const HloMapInstruction* map_instr,
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absl::Span<llvm::Value* const> elemental_operands);
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StatusOr<llvm::Value*> EmitElementalReduceWindow(
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const HloReduceWindowInstruction* reduce_window,
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const llvm_ir::ElementGenerator& input_generator,
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const llvm_ir::ElementGenerator& initial_value_generator,
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const llvm_ir::IrArray::Index& index);
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StatusOr<llvm::Value*> EmitElementalReduce(
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const HloReduceInstruction* reduce,
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std::vector<llvm_ir::ElementGenerator> input_generators,
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std::vector<llvm_ir::ElementGenerator> initial_value_generators,
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const llvm_ir::IrArray::Index& index);
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virtual bool fast_min_max() = 0;
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llvm::IRBuilder<>* const b_;
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llvm::Module* module_;
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// The HloModuleConfig which gathers all settings and values which affect the
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// compiled executable outside of the HLO code itself.
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const HloModuleConfig& hlo_module_config_;
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private:
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// Computes the complex power function, returns (a + i*b)^(c + i*d).
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StatusOr<llvm::Value*> EmitComplexPower(const HloInstruction* op,
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llvm::Value* a, llvm::Value* b,
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llvm::Value* c, llvm::Value* d);
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// Evaluates a polynomial using Horner's method.
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StatusOr<llvm::Value*> EvaluatePolynomial(
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llvm::Type* type, llvm::Value* x, absl::Span<const double> coefficients);
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};
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} // namespace xla
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#endif // TENSORFLOW_COMPILER_XLA_SERVICE_ELEMENTAL_IR_EMITTER_H_
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