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 #include "MipsMCExpr.h"
11 #include "llvm/MC/MCAsmInfo.h"
12 #include "llvm/MC/MCAssembler.h"
13 #include "llvm/MC/MCContext.h"
17 #define DEBUG_TYPE "mipsmcexpr"
19 bool MipsMCExpr::isSupportedBinaryExpr(MCSymbolRefExpr::VariantKind VK,
20 const MCBinaryExpr *BE) {
22 case MCSymbolRefExpr::VK_Mips_ABS_LO:
23 case MCSymbolRefExpr::VK_Mips_ABS_HI:
24 case MCSymbolRefExpr::VK_Mips_HIGHER:
25 case MCSymbolRefExpr::VK_Mips_HIGHEST:
31 // We support expressions of the form "(sym1 binop1 sym2) binop2 const",
32 // where "binop2 const" is optional.
33 if (isa<MCBinaryExpr>(BE->getLHS())) {
34 if (!isa<MCConstantExpr>(BE->getRHS()))
36 BE = cast<MCBinaryExpr>(BE->getLHS());
38 return (isa<MCSymbolRefExpr>(BE->getLHS())
39 && isa<MCSymbolRefExpr>(BE->getRHS()));
43 MipsMCExpr::Create(MCSymbolRefExpr::VariantKind VK, const MCExpr *Expr,
47 case MCSymbolRefExpr::VK_Mips_ABS_LO:
50 case MCSymbolRefExpr::VK_Mips_ABS_HI:
53 case MCSymbolRefExpr::VK_Mips_HIGHER:
54 Kind = VK_Mips_HIGHER;
56 case MCSymbolRefExpr::VK_Mips_HIGHEST:
57 Kind = VK_Mips_HIGHEST;
60 llvm_unreachable("Invalid kind!");
63 return new (Ctx) MipsMCExpr(Kind, Expr);
66 void MipsMCExpr::PrintImpl(raw_ostream &OS) const {
68 default: llvm_unreachable("Invalid kind!");
69 case VK_Mips_LO: OS << "%lo"; break;
70 case VK_Mips_HI: OS << "%hi"; break;
71 case VK_Mips_HIGHER: OS << "%higher"; break;
72 case VK_Mips_HIGHEST: OS << "%highest"; break;
81 MipsMCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
82 const MCAsmLayout *Layout) const {
83 return getSubExpr()->EvaluateAsRelocatable(Res, Layout);
86 // FIXME: This basically copies MCObjectStreamer::AddValueSymbols. Perhaps
87 // that method should be made public?
88 static void AddValueSymbolsImpl(const MCExpr *Value, MCAssembler *Asm) {
89 switch (Value->getKind()) {
91 llvm_unreachable("Can't handle nested target expr!");
93 case MCExpr::Constant:
96 case MCExpr::Binary: {
97 const MCBinaryExpr *BE = cast<MCBinaryExpr>(Value);
98 AddValueSymbolsImpl(BE->getLHS(), Asm);
99 AddValueSymbolsImpl(BE->getRHS(), Asm);
103 case MCExpr::SymbolRef:
104 Asm->getOrCreateSymbolData(cast<MCSymbolRefExpr>(Value)->getSymbol());
108 AddValueSymbolsImpl(cast<MCUnaryExpr>(Value)->getSubExpr(), Asm);
113 void MipsMCExpr::AddValueSymbols(MCAssembler *Asm) const {
114 AddValueSymbolsImpl(getSubExpr(), Asm);