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69e75ae695
This fixes what I consider to be an API flaw I've tripped over multiple times. The point this is constructed isn't well defined, so depending on where this is first called, you can conclude different information based on the MachineFunction. For example, the AMDGPU implementation inspected the MachineFrameInfo on construction for the stack objects and if the frame has calls. This kind of worked in SelectionDAG which visited all allocas up front, but broke in GlobalISel which hasn't visited any of the IR when arguments are lowered. I've run into similar problems before with the MIR parser and trying to make use of other MachineFunction fields, so I think it's best to just categorically disallow dependency on the MachineFunction state in the constructor and to always construct this at the same time as the MachineFunction itself. A missing feature I still could use is a way to access an custom analysis pass on the IR here.
61 lines
2.1 KiB
C++
61 lines
2.1 KiB
C++
//===- SparcMachineFunctionInfo.h - Sparc Machine Function Info -*- 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 declares Sparc specific per-machine-function information.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_SPARC_SPARCMACHINEFUNCTIONINFO_H
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#define LLVM_LIB_TARGET_SPARC_SPARCMACHINEFUNCTIONINFO_H
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#include "llvm/CodeGen/MachineFunction.h"
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namespace llvm {
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class SparcMachineFunctionInfo : public MachineFunctionInfo {
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virtual void anchor();
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private:
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Register GlobalBaseReg;
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/// VarArgsFrameOffset - Frame offset to start of varargs area.
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int VarArgsFrameOffset;
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/// SRetReturnReg - Holds the virtual register into which the sret
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/// argument is passed.
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Register SRetReturnReg;
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/// IsLeafProc - True if the function is a leaf procedure.
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bool IsLeafProc;
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public:
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SparcMachineFunctionInfo()
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: GlobalBaseReg(0), VarArgsFrameOffset(0), SRetReturnReg(0),
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IsLeafProc(false) {}
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SparcMachineFunctionInfo(const Function &F, const TargetSubtargetInfo *STI)
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: GlobalBaseReg(0), VarArgsFrameOffset(0), SRetReturnReg(0),
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IsLeafProc(false) {}
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MachineFunctionInfo *
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clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
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const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
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const override;
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Register getGlobalBaseReg() const { return GlobalBaseReg; }
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void setGlobalBaseReg(Register Reg) { GlobalBaseReg = Reg; }
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int getVarArgsFrameOffset() const { return VarArgsFrameOffset; }
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void setVarArgsFrameOffset(int Offset) { VarArgsFrameOffset = Offset; }
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Register getSRetReturnReg() const { return SRetReturnReg; }
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void setSRetReturnReg(Register Reg) { SRetReturnReg = Reg; }
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void setLeafProc(bool rhs) { IsLeafProc = rhs; }
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bool isLeafProc() const { return IsLeafProc; }
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};
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}
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#endif
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