lib/Target/X86/X86AsmPrinter.h

   1 //===-- X86AsmPrinter.h - Convert X86 LLVM code to Intel assembly ---------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file was developed by the LLVM research group and is distributed under
   6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file the shared super class printer that converts from our internal
  11 // representation of machine-dependent LLVM code to Intel and AT&T format
  12 // assembly language.  This printer is the output mechanism used by `llc'.
  13 //
  14 //===----------------------------------------------------------------------===//
  15
  16 #ifndef X86ASMPRINTER_H
  17 #define X86ASMPRINTER_H
  18
  19 #include "X86.h"
  20 #include "X86TargetMachine.h"
  21 #include "llvm/CodeGen/AsmPrinter.h"
  22 #include "llvm/CodeGen/DwarfWriter.h"
  23 #include "llvm/CodeGen/MachineDebugInfo.h"
  24 #include "llvm/ADT/Statistic.h"
  25 #include <set>
  26
  27
  28 namespace llvm {
  29
  30 extern Statistic<> EmittedInsts;
  31
  32 /// X86DwarfWriter - Dwarf debug info writer customized for Darwin/Mac OS X
  33 ///
  34 struct X86DwarfWriter : public DwarfWriter {
  35  // Ctor.
  36 X86DwarfWriter(std::ostream &o, AsmPrinter *ap)
  37   : DwarfWriter(o, ap)
  38     {
  39       needsSet = true;
  40       DwarfAbbrevSection = ".section __DWARFA,__debug_abbrev";
  41       DwarfInfoSection = ".section __DWARFA,__debug_info";
  42       DwarfLineSection = ".section __DWARFA,__debug_line";
  43       DwarfFrameSection = ".section __DWARFA,__debug_frame";
  44       DwarfPubNamesSection = ".section __DWARFA,__debug_pubnames";
  45       DwarfPubTypesSection = ".section __DWARFA,__debug_pubtypes";
  46       DwarfStrSection = ".section __DWARFA,__debug_str";
  47       DwarfLocSection = ".section __DWARFA,__debug_loc";
  48       DwarfARangesSection = ".section __DWARFA,__debug_aranges";
  49       DwarfRangesSection = ".section __DWARFA,__debug_ranges";
  50       DwarfMacInfoSection = ".section __DWARFA,__debug_macinfo";
  51       TextSection = ".text";
  52        DataSection = ".data";
  53     }
  54 };
  55
  56 struct X86SharedAsmPrinter : public AsmPrinter {
  57   X86DwarfWriter DW;
  58
  59   X86SharedAsmPrinter(std::ostream &O, X86TargetMachine &TM)
  60     : AsmPrinter(O, TM), DW(O, this), forDarwin(false) { }
  61
  62   bool doInitialization(Module &M);
  63   bool doFinalization(Module &M);
  64
  65   void getAnalysisUsage(AnalysisUsage &AU) const {
  66     AU.setPreservesAll();
  67     AU.addRequired<MachineDebugInfo>();
  68     MachineFunctionPass::getAnalysisUsage(AU);
  69   }
  70
  71   bool forDarwin;  // FIXME: eliminate.
  72
  73   // Necessary for Darwin to print out the apprioriate types of linker stubs
  74   std::set<std::string> FnStubs, GVStubs, LinkOnceStubs;
  75
  76   inline static bool isScale(const MachineOperand &MO) {
  77     return MO.isImmediate() &&
  78           (MO.getImmedValue() == 1 || MO.getImmedValue() == 2 ||
  79           MO.getImmedValue() == 4 || MO.getImmedValue() == 8);
  80   }
  81
  82   inline static bool isMem(const MachineInstr *MI, unsigned Op) {
  83     if (MI->getOperand(Op).isFrameIndex()) return true;
  84     return Op+4 <= MI->getNumOperands() &&
  85       MI->getOperand(Op  ).isRegister() && isScale(MI->getOperand(Op+1)) &&
  86       MI->getOperand(Op+2).isRegister() &&
  87       (MI->getOperand(Op+3).isImmediate() ||
  88        MI->getOperand(Op+3).isGlobalAddress() ||
  89        MI->getOperand(Op+3).isConstantPoolIndex());
  90   }
  91 };
  92
  93 } // end namespace llvm
  94
  95 #endif