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d39c38d2bc
Switch to MC for instruction printing. This encompasses several changes which are all interconnected: - Use the MC framework for printing almost all instructions. - AsmStrings are now live. - This introduces an indirection between LLVM vregs and WebAssembly registers, and a new pass, WebAssemblyRegNumbering, for computing a basic the mapping. This addresses some basic issues with argument registers and unused registers. - The way ARGUMENT instructions are handled no longer generates redundant get_local+set_local for every argument. This also changes the assembly syntax somewhat; most notably, MC's printing does not use sigils on label names, so those are no longer present, and push/pop now have a sigil to keep them unambiguous. The usage of set_local/get_local/$push/$pop will continue to evolve significantly. This patch is just one step of a larger change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252910 91177308-0d34-0410-b5e6-96231b3b80d8
61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
// WebAssemblyMachineFunctionInfo.h-WebAssembly machine function info-*- C++ -*-
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// \brief This file declares WebAssembly-specific per-machine-function
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/// information.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYMACHINEFUNCTIONINFO_H
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#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYMACHINEFUNCTIONINFO_H
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#include "WebAssemblyRegisterInfo.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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namespace llvm {
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/// This class is derived from MachineFunctionInfo and contains private
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/// WebAssembly-specific information for each MachineFunction.
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class WebAssemblyFunctionInfo final : public MachineFunctionInfo {
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MachineFunction &MF;
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std::vector<MVT> Params;
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std::vector<MVT> Results;
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/// A mapping from CodeGen vreg index to WebAssembly register number.
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std::vector<unsigned> WARegs;
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public:
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explicit WebAssemblyFunctionInfo(MachineFunction &MF) : MF(MF) {}
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~WebAssemblyFunctionInfo() override;
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void addParam(MVT VT) { Params.push_back(VT); }
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const std::vector<MVT> &getParams() const { return Params; }
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void addResult(MVT VT) { Results.push_back(VT); }
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const std::vector<MVT> &getResults() const { return Results; }
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void initWARegs() {
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assert(WARegs.empty());
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WARegs.resize(MF.getRegInfo().getNumVirtRegs(), -1u);
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}
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void setWAReg(unsigned VReg, unsigned WAReg) {
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WARegs[TargetRegisterInfo::virtReg2Index(VReg)] = WAReg;
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}
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unsigned getWAReg(unsigned VReg) const {
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return WARegs[TargetRegisterInfo::virtReg2Index(VReg)];
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}
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};
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} // end namespace llvm
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#endif
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