214e6b40f8
This PR introduces support for inline assembly calls for SPIR-V Backend in general, and support for SPV_INTEL_inline_assembly [1] extension in particular. The former part of the PR is agnostic towards vendor-specific requirements and resolves the task of supporting successful transformation of inline assembly as long as it's possible without specific SPIR-V instruction codes. As a part of the PR there appears an opportunity to bring coherent inline assembly information up to latest passes of the transformation process (emitting final SPIR-V instructions), so that PR makes it easy to add any another required flavor of inline assembly, other then supported by the vendor specific SPV_INTEL_inline_assembly extension, if/when needed. At the moment, however, SPV_INTEL_inline_assembly is the only implemented way to bring LLVM IR inline assembly calls up to valid SPIR-V instructions and also the default one. This means that inline assembly calls will generate an error message of such extension is not used to prevent LLVM-generated error messages at the final stages of translation. When the SPV_INTEL_inline_assembly extension is mentioned among supported, translation of inline assembly is intercepted by this extension implementation on a pre-legalizer step, and this is a place where support for a new inline assembly extension may be added if needed. This PR also extends support for register classes, improves type inference during pre-legalizer pass, and fixes a minor bug with asm-printing of string literals. [1] https://github.com/intel/llvm/blob/sycl/sycl/doc/design/spirv-extensions/SPV_INTEL_inline_assembly.asciidoc
34 lines
1.2 KiB
C++
34 lines
1.2 KiB
C++
//===--- SPIRVInlineAsmLowering.h - Inline Asm lowering ---------*- 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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// This file describes how to lower LLVM inline asm calls to machine
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// code calls for GlobalISel.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_SPIRV_SPIRVINLINEASMLOWERING_H
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#define LLVM_LIB_TARGET_SPIRV_SPIRVINLINEASMLOWERING_H
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#include "llvm/CodeGen/GlobalISel/InlineAsmLowering.h"
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namespace llvm {
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class SPIRVTargetLowering;
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class SPIRVInlineAsmLowering : public InlineAsmLowering {
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public:
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SPIRVInlineAsmLowering(const SPIRVTargetLowering &TLI);
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bool
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lowerAsmOperandForConstraint(Value *Val, StringRef Constraint,
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std::vector<MachineOperand> &Ops,
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MachineIRBuilder &MIRBuilder) const override;
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};
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_SPIRV_SPIRVINLINEASMLOWERING_H
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