1 //===-- MipsMCExpr.cpp - Mips specific MC expression classes --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #define DEBUG_TYPE "mipsmcexpr"
11 #include "MipsMCExpr.h"
12 #include "llvm/MC/MCAsmInfo.h"
13 #include "llvm/MC/MCAssembler.h"
14 #include "llvm/MC/MCContext.h"
18 bool MipsMCExpr::isSupportedBinaryExpr(MCSymbolRefExpr::VariantKind VK,
19 const MCBinaryExpr *BE) {
21 case MCSymbolRefExpr::VK_Mips_ABS_LO:
22 case MCSymbolRefExpr::VK_Mips_ABS_HI:
23 case MCSymbolRefExpr::VK_Mips_HIGHER:
24 case MCSymbolRefExpr::VK_Mips_HIGHEST:
30 // We support expressions of the form "(sym1 binop1 sym2) binop2 const",
31 // where "binop2 const" is optional.
32 if (isa<MCBinaryExpr>(BE->getLHS())) {
33 if (!isa<MCConstantExpr>(BE->getRHS()))
35 BE = cast<MCBinaryExpr>(BE->getLHS());
37 return (isa<MCSymbolRefExpr>(BE->getLHS())
38 && isa<MCSymbolRefExpr>(BE->getRHS()));
42 MipsMCExpr::Create(MCSymbolRefExpr::VariantKind VK, const MCExpr *Expr,
46 case MCSymbolRefExpr::VK_Mips_ABS_LO:
49 case MCSymbolRefExpr::VK_Mips_ABS_HI:
52 case MCSymbolRefExpr::VK_Mips_HIGHER:
53 Kind = VK_Mips_HIGHER;
55 case MCSymbolRefExpr::VK_Mips_HIGHEST:
56 Kind = VK_Mips_HIGHEST;
59 llvm_unreachable("Invalid kind!");
62 return new (Ctx) MipsMCExpr(Kind, Expr);
65 void MipsMCExpr::PrintImpl(raw_ostream &OS) const {
67 default: llvm_unreachable("Invalid kind!");
68 case VK_Mips_LO: OS << "%lo"; break;
69 case VK_Mips_HI: OS << "%hi"; break;
70 case VK_Mips_HIGHER: OS << "%higher"; break;
71 case VK_Mips_HIGHEST: OS << "%highest"; break;
80 MipsMCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
81 const MCAsmLayout *Layout) const {
82 return getSubExpr()->EvaluateAsRelocatable(Res, Layout);
85 // FIXME: This basically copies MCObjectStreamer::AddValueSymbols. Perhaps
86 // that method should be made public?
87 static void AddValueSymbolsImpl(const MCExpr *Value, MCAssembler *Asm) {
88 switch (Value->getKind()) {
90 llvm_unreachable("Can't handle nested target expr!");
92 case MCExpr::Constant:
95 case MCExpr::Binary: {
96 const MCBinaryExpr *BE = cast<MCBinaryExpr>(Value);
97 AddValueSymbolsImpl(BE->getLHS(), Asm);
98 AddValueSymbolsImpl(BE->getRHS(), Asm);
102 case MCExpr::SymbolRef:
103 Asm->getOrCreateSymbolData(cast<MCSymbolRefExpr>(Value)->getSymbol());
107 AddValueSymbolsImpl(cast<MCUnaryExpr>(Value)->getSubExpr(), Asm);
112 void MipsMCExpr::AddValueSymbols(MCAssembler *Asm) const {
113 AddValueSymbolsImpl(getSubExpr(), Asm);