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https://github.com/c64scene-ar/llvm-6502.git
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6559bb96a9
convenience method. Fix typo in comment. lib/Target/X86/InstSelectSimple.cpp: Explicitly specify some implicit uses. Use MOVZX/MOVSX instead of MOV instructions with sign extend instructions. Take out LEAVE instructions. 32-bit IDIV and DIV use CDQ, not CWQ (CWQ is a typo). Fix typo in comment and remove some FIXME comments. lib/Target/X86/Printer.cpp: Include X86InstrInfo.h and llvm/Function.h. Add some simple code to Printer::runOnFunction to iterate over MachineBasicBlocks and call X86InstrInfo::print(). lib/Target/X86/X86InstrInfo.def: Make some more instructions with implicit defs "Void". Add more sign/zero extending "move" insns (movsx, movzx). lib/Target/X86/X86RegisterInfo.def: Add EFLAGS as a register. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4707 91177308-0d34-0410-b5e6-96231b3b80d8
69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
//===-- X86/Printer.cpp - Convert X86 code to human readable rep. ---------===//
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//
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// This file contains a printer that converts from our internal representation
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// of LLVM code to a nice human readable form that is suitable for debuggging.
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//
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//===----------------------------------------------------------------------===//
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#include "X86.h"
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#include "X86InstrInfo.h"
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#include "llvm/Pass.h"
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#include "llvm/Function.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include <iostream>
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namespace {
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struct Printer : public FunctionPass {
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TargetMachine &TM;
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std::ostream &O;
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Printer(TargetMachine &tm, std::ostream &o) : TM(tm), O(o) {}
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bool runOnFunction(Function &F);
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};
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}
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/// runOnFunction - This uses the X86InstructionInfo::print method
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/// to print assembly for each instruction.
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bool Printer::runOnFunction (Function & F)
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{
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static unsigned bbnumber = 0;
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MachineFunction & MF = MachineFunction::get (&F);
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const MachineInstrInfo & MII = TM.getInstrInfo ();
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const X86InstrInfo & x86ii = dynamic_cast <const X86InstrInfo &> (MII);
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O << "# x86 printing not implemented yet!\n";
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// Print out labels for the function.
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O << "\t.globl\t" << F.getName () << "\n";
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O << "\t.type\t" << F.getName () << ", @function\n";
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O << F.getName () << ":\n";
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// Print out code for the function.
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for (MachineFunction::const_iterator bb_i = MF.begin (), bb_e = MF.end ();
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bb_i != bb_e; ++bb_i)
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{
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// Print a label for the basic block.
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O << ".BB" << bbnumber++ << ":\n";
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for (MachineBasicBlock::const_iterator i_i = bb_i->begin (), i_e =
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bb_i->end (); i_i != i_e; ++i_i)
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{
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// Print the assembly for the instruction.
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O << "\t";
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x86ii.print (*i_i, O);
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}
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}
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// We didn't modify anything.
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return false;
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}
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/// createX86CodePrinterPass - Print out the specified machine code function to
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/// the specified stream. This function should work regardless of whether or
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/// not the function is in SSA form or not.
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///
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Pass *createX86CodePrinterPass(TargetMachine &TM, std::ostream &O) {
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return new Printer(TM, O);
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}
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