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https://github.com/c64scene-ar/llvm-6502.git
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fba2a769a1
1) Fix a specific bug when certain conversion functions are called in a program compiled as mips16 with hard float and the program is linked as c++. There are two libraries that are reversed in the link order with gcc/g++ and clang/clang++ for mips16 in this case and the proper stubs will then not be called. These stubs are normally handled in the Mips16HardFloat pass but in this case we don't know at that time that we need to generate the stubs. This must all be handled later in code generation and we have moved this functionality to MipsAsmPrinter. When linked as C (gcc or clang) the proper stubs are linked in from libc. 2) Set up the infrastructure to handle 90% of what is in the Mips16HardFloat pass in this new area of MipsAsmPrinter. This is a more logical place to handle this and we have known for some time that we needed to move the code later and not implement it using inline asm as we do now but it was not clear exactly where to do this and what mechanism should be used. Now it's clear to us how to do this and this patch contains the infrastructure to move most of this to MipsAsmPrinter but the actual moving will be done in a follow on patch. The same infrastructure is used to fix this current bug as described in #1. This change was requested by the list during the original putback of the Mips16HardFloat pass but was not practical for us do at that time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201426 91177308-0d34-0410-b5e6-96231b3b80d8
132 lines
4.5 KiB
C++
132 lines
4.5 KiB
C++
//===-- MipsAsmPrinter.h - Mips LLVM Assembly Printer ----------*- 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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// Mips Assembly printer class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MIPSASMPRINTER_H
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#define MIPSASMPRINTER_H
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#include "Mips16HardFloatInfo.h"
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#include "MipsMCInstLower.h"
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#include "MipsMachineFunction.h"
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#include "MipsSubtarget.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Target/TargetMachine.h"
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namespace llvm {
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class MCStreamer;
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class MachineInstr;
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class MachineBasicBlock;
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class MipsTargetStreamer;
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class Module;
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class raw_ostream;
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class LLVM_LIBRARY_VISIBILITY MipsAsmPrinter : public AsmPrinter {
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MipsTargetStreamer &getTargetStreamer();
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void EmitInstrWithMacroNoAT(const MachineInstr *MI);
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private:
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// tblgen'erated function.
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bool emitPseudoExpansionLowering(MCStreamer &OutStreamer,
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const MachineInstr *MI);
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// lowerOperand - Convert a MachineOperand into the equivalent MCOperand.
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bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp);
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/// MCP - Keep a pointer to constantpool entries of the current
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/// MachineFunction.
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const MachineConstantPool *MCP;
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/// InConstantPool - Maintain state when emitting a sequence of constant
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/// pool entries so we can properly mark them as data regions.
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bool InConstantPool;
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std::map<const char *, const llvm::Mips16HardFloatInfo::FuncSignature *>
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StubsNeeded;
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void EmitJal(MCSymbol *Symbol);
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void EmitInstrReg(unsigned Opcode, unsigned Reg);
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void EmitInstrRegReg(unsigned Opcode, unsigned Reg1, unsigned Reg2);
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void EmitInstrRegRegReg(unsigned Opcode, unsigned Reg1, unsigned Reg2,
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unsigned Reg3);
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void EmitMovFPIntPair(unsigned MovOpc, unsigned Reg1, unsigned Reg2,
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unsigned FPReg1, unsigned FPReg2, bool LE);
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void EmitSwapFPIntParams(Mips16HardFloatInfo::FPParamVariant, bool LE,
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bool ToFP);
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void EmitSwapFPIntRetval(Mips16HardFloatInfo::FPReturnVariant, bool LE);
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void EmitFPCallStub(const char *, const Mips16HardFloatInfo::FuncSignature *);
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public:
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const MipsSubtarget *Subtarget;
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const MipsFunctionInfo *MipsFI;
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MipsMCInstLower MCInstLowering;
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explicit MipsAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
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: AsmPrinter(TM, Streamer), MCP(0), InConstantPool(false),
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MCInstLowering(*this) {
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Subtarget = &TM.getSubtarget<MipsSubtarget>();
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}
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virtual const char *getPassName() const {
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return "Mips Assembly Printer";
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}
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virtual bool runOnMachineFunction(MachineFunction &MF);
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virtual void EmitConstantPool() LLVM_OVERRIDE {
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bool UsingConstantPools =
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(Subtarget->inMips16Mode() && Subtarget->useConstantIslands());
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if (!UsingConstantPools)
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AsmPrinter::EmitConstantPool();
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// we emit constant pools customly!
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}
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void EmitInstruction(const MachineInstr *MI);
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void printSavedRegsBitmask();
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void emitFrameDirective();
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const char *getCurrentABIString() const;
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virtual void EmitFunctionEntryLabel();
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virtual void EmitFunctionBodyStart();
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virtual void EmitFunctionBodyEnd();
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virtual bool isBlockOnlyReachableByFallthrough(const MachineBasicBlock*
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MBB) const;
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bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
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unsigned AsmVariant, const char *ExtraCode,
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raw_ostream &O);
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bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
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unsigned AsmVariant, const char *ExtraCode,
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raw_ostream &O);
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void printOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
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void printUnsignedImm(const MachineInstr *MI, int opNum, raw_ostream &O);
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void printUnsignedImm8(const MachineInstr *MI, int opNum, raw_ostream &O);
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void printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
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void printMemOperandEA(const MachineInstr *MI, int opNum, raw_ostream &O);
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void printFCCOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
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const char *Modifier = 0);
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void EmitStartOfAsmFile(Module &M);
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void EmitEndOfAsmFile(Module &M);
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void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS);
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};
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}
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#endif
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