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https://github.com/c64scene-ar/llvm-6502.git
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6ffbf6ea8f
This let us to remove some custom code that matched constant offsets from globals at instruction selection time as a special addressing mode. No intended functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181126 91177308-0d34-0410-b5e6-96231b3b80d8
87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
//===-- XCoreInstPrinter.cpp - Convert XCore MCInst to assembly syntax ----===//
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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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// This class prints an XCore MCInst to a .s file.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "asm-printer"
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#include "XCoreInstPrinter.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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#include "XCoreGenAsmWriter.inc"
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void XCoreInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
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OS << StringRef(getRegisterName(RegNo)).lower();
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}
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void XCoreInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
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StringRef Annot) {
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printInstruction(MI, O);
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printAnnotation(O, Annot);
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}
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void XCoreInstPrinter::
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printInlineJT(const MCInst *MI, int opNum, raw_ostream &O) {
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report_fatal_error("can't handle InlineJT");
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}
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void XCoreInstPrinter::
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printInlineJT32(const MCInst *MI, int opNum, raw_ostream &O) {
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report_fatal_error("can't handle InlineJT32");
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}
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static void printExpr(const MCExpr *Expr, raw_ostream &OS) {
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int Offset = 0;
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const MCSymbolRefExpr *SRE;
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if (const MCBinaryExpr *BE = dyn_cast<MCBinaryExpr>(Expr)) {
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SRE = dyn_cast<MCSymbolRefExpr>(BE->getLHS());
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const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(BE->getRHS());
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assert(SRE && CE && "Binary expression must be sym+const.");
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Offset = CE->getValue();
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} else {
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SRE = dyn_cast<MCSymbolRefExpr>(Expr);
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assert(SRE && "Unexpected MCExpr type.");
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}
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assert(SRE->getKind() == MCSymbolRefExpr::VK_None);
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OS << SRE->getSymbol();
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if (Offset) {
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if (Offset > 0)
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OS << '+';
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OS << Offset;
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}
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}
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void XCoreInstPrinter::
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printOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O) {
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const MCOperand &Op = MI->getOperand(OpNo);
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if (Op.isReg()) {
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printRegName(O, Op.getReg());
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return;
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}
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if (Op.isImm()) {
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O << Op.getImm();
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return;
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}
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assert(Op.isExpr() && "unknown operand kind in printOperand");
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printExpr(Op.getExpr(), O);
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}
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