1 //===-- XtensaMCExpr.cpp - Xtensa specific MC expression classes ----------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 6 // See https://llvm.org/LICENSE.txt for license information. 7 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 8 // 9 //===----------------------------------------------------------------------===// 10 // 11 // This file contains the implementation of the assembly expression modifiers 12 // accepted by the Xtensa architecture 13 // 14 //===----------------------------------------------------------------------===// 15 16 #include "XtensaMCExpr.h" 17 #include "llvm/MC/MCAssembler.h" 18 #include "llvm/MC/MCContext.h" 19 #include "llvm/MC/MCStreamer.h" 20 #include "llvm/MC/MCSymbolELF.h" 21 #include "llvm/MC/MCValue.h" 22 #include "llvm/Object/ELF.h" 23 #include "llvm/Support/ErrorHandling.h" 24 25 using namespace llvm; 26 27 #define DEBUG_TYPE "xtensamcexpr" 28 29 const XtensaMCExpr *XtensaMCExpr::create(const MCExpr *Expr, VariantKind Kind, 30 MCContext &Ctx) { 31 return new (Ctx) XtensaMCExpr(Expr, Kind); 32 } 33 34 void XtensaMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const { 35 bool HasVariant = getKind() != VK_Xtensa_None; 36 if (HasVariant) 37 OS << '%' << getVariantKindName(getKind()) << '('; 38 Expr->print(OS, MAI); 39 if (HasVariant) 40 OS << ')'; 41 } 42 43 bool XtensaMCExpr::evaluateAsRelocatableImpl(MCValue &Res, 44 const MCAsmLayout *Layout, 45 const MCFixup *Fixup) const { 46 return getSubExpr()->evaluateAsRelocatable(Res, Layout, Fixup); 47 } 48 49 void XtensaMCExpr::visitUsedExpr(MCStreamer &Streamer) const { 50 Streamer.visitUsedExpr(*getSubExpr()); 51 } 52 53 XtensaMCExpr::VariantKind XtensaMCExpr::getVariantKindForName(StringRef name) { 54 return StringSwitch<XtensaMCExpr::VariantKind>(name).Default( 55 VK_Xtensa_Invalid); 56 } 57 58 StringRef XtensaMCExpr::getVariantKindName(VariantKind Kind) { 59 switch (Kind) { 60 default: 61 llvm_unreachable("Invalid ELF symbol kind"); 62 } 63 } 64