ff1b01bb78
Some of this was needed to fix implicit conversions from MCRegister to unsigned when calling getReg() on MCOperand for example. The majority was done by reviewing parts of the code that dealt with registers, converting them to MCRegister and then seeing what new implicit conversions were created and fixing those. There were a few places where I used MCPhysReg instead of MCRegiser for static arrays since its uint16_t instead of unsigned.
66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
//===-- ParallelSnippetGenerator.h ------------------------------*- C++ -*-===//
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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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///
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/// \file
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/// A SnippetGenerator implementation to create parallel instruction snippets.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TOOLS_LLVM_EXEGESIS_PARALLELSNIPPETGENERATOR_H
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#define LLVM_TOOLS_LLVM_EXEGESIS_PARALLELSNIPPETGENERATOR_H
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#include "SnippetGenerator.h"
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namespace llvm {
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namespace exegesis {
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class ParallelSnippetGenerator : public SnippetGenerator {
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public:
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using SnippetGenerator::SnippetGenerator;
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~ParallelSnippetGenerator() override;
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Expected<std::vector<CodeTemplate>>
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generateCodeTemplates(InstructionTemplate Variant,
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const BitVector &ForbiddenRegisters) const override;
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static constexpr const size_t kMinNumDifferentAddresses = 6;
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private:
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// Instantiates memory operands within a snippet.
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// To make computations as parallel as possible, we generate independant
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// memory locations for instructions that load and store. If there are less
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// than kMinNumDifferentAddresses in the original snippet, we duplicate
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// instructions until there are this number of instructions.
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// For example, assuming kMinNumDifferentAddresses=5 and
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// getMaxMemoryAccessSize()=64, if the original snippet is:
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// mov eax, [memory]
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// we might generate:
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// mov eax, [rdi]
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// mov eax, [rdi + 64]
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// mov eax, [rdi + 128]
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// mov eax, [rdi + 192]
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// mov eax, [rdi + 256]
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// If the original snippet is:
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// mov eax, [memory]
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// add eax, [memory]
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// we might generate:
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// mov eax, [rdi]
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// add eax, [rdi + 64]
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// mov eax, [rdi + 128]
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// add eax, [rdi + 192]
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// mov eax, [rdi + 256]
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void instantiateMemoryOperands(
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MCRegister ScratchSpaceReg,
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std::vector<InstructionTemplate> &SnippetTemplate) const;
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};
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} // namespace exegesis
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} // namespace llvm
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#endif // LLVM_TOOLS_LLVM_EXEGESIS_PARALLELSNIPPETGENERATOR_H
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