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5d88a6a71d
Summary: Renames `ExprType` to the more apt `BlockType` and adds a variant for multivalue blocks. Currently non-void blocks are only generated at the end of functions where the block return type needs to agree with the function return type, and that remains true for multivalue blocks. That invariant means that the actual signature does not need to be stored in the block signature `MachineOperand` because it can be inferred by `WebAssemblyMCInstLower` from the return type of the parent function. `WebAssemblyMCInstLower` continues to lower block signature operands to immediates when possible but lowers multivalue signatures to function type symbols. The AsmParser and Disassembler are updated to handle multivalue block types as well. Reviewers: aheejin, dschuff, aardappel Subscribers: sbc100, jgravelle-google, hiraditya, sunfish, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D68889 llvm-svn: 374933
48 lines
1.6 KiB
C++
48 lines
1.6 KiB
C++
//===-- WebAssemblyMCInstLower.h - Lower MachineInstr to MCInst -*- 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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/// This file declares the class to lower WebAssembly MachineInstrs to
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/// their corresponding MCInst records.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYMCINSTLOWER_H
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#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYMCINSTLOWER_H
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#include "llvm/BinaryFormat/Wasm.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/Support/Compiler.h"
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namespace llvm {
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class WebAssemblyAsmPrinter;
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class MCContext;
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class MCSymbol;
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class MachineInstr;
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class MachineOperand;
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/// This class is used to lower an MachineInstr into an MCInst.
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class LLVM_LIBRARY_VISIBILITY WebAssemblyMCInstLower {
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MCContext &Ctx;
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WebAssemblyAsmPrinter &Printer;
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MCSymbol *GetGlobalAddressSymbol(const MachineOperand &MO) const;
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MCSymbol *GetExternalSymbolSymbol(const MachineOperand &MO) const;
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MCOperand lowerSymbolOperand(const MachineOperand &MO, MCSymbol *Sym) const;
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MCOperand lowerTypeIndexOperand(SmallVector<wasm::ValType, 1> &&,
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SmallVector<wasm::ValType, 4> &&) const;
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public:
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WebAssemblyMCInstLower(MCContext &ctx, WebAssemblyAsmPrinter &printer)
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: Ctx(ctx), Printer(printer) {}
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void lower(const MachineInstr *MI, MCInst &OutMI) const;
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};
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} // end namespace llvm
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#endif
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