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gerrit-public.fairphone.software / toolchain / llvm-project / dd13643b971b58188012d1d82d17ac78651dbbce / . / llvm / lib / MC / MCExpr.cpp
blob: 83a245602cecbaae06b948ca1fa8d54727731642 [file] [log] [blame]
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]1//===- MCExpr.cpp - Assembly Level Expression Implementation --------------===//
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]10#include "llvm/MC/MCExpr.h"
Daniel Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]11#include "llvm/ADT/Statistic.h"
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]12#include "llvm/ADT/StringSwitch.h"
David Peixotto8ad70b32013-12-04 22:43:20 +0000[diff] [blame]13#include "llvm/MC/MCAsmInfo.h"
Daniel Dunbar5c5228a2010-03-11 05:53:37 +0000[diff] [blame]14#include "llvm/MC/MCAsmLayout.h"
15#include "llvm/MC/MCAssembler.h"
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]16#include "llvm/MC/MCContext.h"
Craig Topper6e80c282012-03-26 06:58:25 +0000[diff] [blame]17#include "llvm/MC/MCObjectWriter.h"
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]18#include "llvm/MC/MCSymbol.h"
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]19#include "llvm/MC/MCValue.h"
David Greenea8cbfb82010-01-05 01:28:07 +0000[diff] [blame]20#include "llvm/Support/Debug.h"
Chandler Carruthf3e85022012-01-10 18:08:01 +0000[diff] [blame]21#include "llvm/Support/ErrorHandling.h"
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]22#include "llvm/Support/raw_ostream.h"
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]23using namespace llvm;
24
Chandler Carruthf58e3762014-04-22 03:04:17 +0000[diff] [blame]25#define DEBUG_TYPE "mcexpr"
26
Daniel Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]27namespace {
28namespace stats {
29STATISTIC(MCExprEvaluate, "Number of MCExpr evaluations");
30}
31}
32
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]33void MCExpr::print(raw_ostream &OS) const {
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]34 switch (getKind()) {
Chris Lattner38d022e2010-02-08 19:41:07 +0000[diff] [blame]35 case MCExpr::Target:
36 return cast<MCTargetExpr>(this)->PrintImpl(OS);
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]37 case MCExpr::Constant:
38 OS << cast<MCConstantExpr>(*this).getValue();
39 return;
40
Chris Lattner22833a32009-09-08 23:20:50 +0000[diff] [blame]41 case MCExpr::SymbolRef: {
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]42 const MCSymbolRefExpr &SRE = cast<MCSymbolRefExpr>(*this);
43 const MCSymbol &Sym = SRE.getSymbol();
Chris Lattneredb9d842010-11-15 02:46:57 +0000[diff] [blame]44 // Parenthesize names that start with $ so that they don't look like
45 // absolute names.
46 bool UseParens = Sym.getName()[0] == '$';
Chris Lattneredb9d842010-11-15 02:46:57 +0000[diff] [blame]47 if (UseParens)
Chris Lattner8b5d55e2010-01-17 21:43:43 +0000[diff] [blame]48 OS << '(' << Sym << ')';
49 else
50 OS << Sym;
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]51
Benjamin Kramerdd136432014-10-11 17:57:27 +0000[diff] [blame^]52 if (SRE.getKind() != MCSymbolRefExpr::VK_None)
53 SRE.printVariantKind(OS);
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]54
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]55 return;
Chris Lattner22833a32009-09-08 23:20:50 +0000[diff] [blame]56 }
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]57
58 case MCExpr::Unary: {
59 const MCUnaryExpr &UE = cast<MCUnaryExpr>(*this);
60 switch (UE.getOpcode()) {
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]61 case MCUnaryExpr::LNot: OS << '!'; break;
62 case MCUnaryExpr::Minus: OS << '-'; break;
63 case MCUnaryExpr::Not: OS << '~'; break;
64 case MCUnaryExpr::Plus: OS << '+'; break;
65 }
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]66 OS << *UE.getSubExpr();
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]67 return;
68 }
69
70 case MCExpr::Binary: {
71 const MCBinaryExpr &BE = cast<MCBinaryExpr>(*this);
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]72
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]73 // Only print parens around the LHS if it is non-trivial.
74 if (isa<MCConstantExpr>(BE.getLHS()) || isa<MCSymbolRefExpr>(BE.getLHS())) {
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]75 OS << *BE.getLHS();
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]76 } else {
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]77 OS << '(' << *BE.getLHS() << ')';
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]78 }
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]79
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]80 switch (BE.getOpcode()) {
Chris Lattner7975b8f2009-09-08 06:37:35 +0000[diff] [blame]81 case MCBinaryExpr::Add:
82 // Print "X-42" instead of "X+-42".
83 if (const MCConstantExpr *RHSC = dyn_cast<MCConstantExpr>(BE.getRHS())) {
84 if (RHSC->getValue() < 0) {
85 OS << RHSC->getValue();
86 return;
87 }
88 }
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]89
Chris Lattner7975b8f2009-09-08 06:37:35 +0000[diff] [blame]90 OS << '+';
91 break;
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]92 case MCBinaryExpr::And: OS << '&'; break;
93 case MCBinaryExpr::Div: OS << '/'; break;
94 case MCBinaryExpr::EQ: OS << "=="; break;
95 case MCBinaryExpr::GT: OS << '>'; break;
96 case MCBinaryExpr::GTE: OS << ">="; break;
97 case MCBinaryExpr::LAnd: OS << "&&"; break;
98 case MCBinaryExpr::LOr: OS << "||"; break;
99 case MCBinaryExpr::LT: OS << '<'; break;
100 case MCBinaryExpr::LTE: OS << "<="; break;
101 case MCBinaryExpr::Mod: OS << '%'; break;
102 case MCBinaryExpr::Mul: OS << '*'; break;
103 case MCBinaryExpr::NE: OS << "!="; break;
104 case MCBinaryExpr::Or: OS << '|'; break;
105 case MCBinaryExpr::Shl: OS << "<<"; break;
106 case MCBinaryExpr::Shr: OS << ">>"; break;
107 case MCBinaryExpr::Sub: OS << '-'; break;
108 case MCBinaryExpr::Xor: OS << '^'; break;
109 }
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]110
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]111 // Only print parens around the LHS if it is non-trivial.
112 if (isa<MCConstantExpr>(BE.getRHS()) || isa<MCSymbolRefExpr>(BE.getRHS())) {
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]113 OS << *BE.getRHS();
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]114 } else {
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]115 OS << '(' << *BE.getRHS() << ')';
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]116 }
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]117 return;
118 }
119 }
120
Craig Toppera2886c22012-02-07 05:05:23 +0000[diff] [blame]121 llvm_unreachable("Invalid expression kind!");
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]122}
123
Manman Ren49d684e2012-09-12 05:06:18 +0000[diff] [blame]124#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]125void MCExpr::dump() const {
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]126 print(dbgs());
David Greenea8cbfb82010-01-05 01:28:07 +0000[diff] [blame]127 dbgs() << '\n';
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]128}
Manman Renc3366cc2012-09-06 19:55:56 +0000[diff] [blame]129#endif
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]130
131/* *** */
132
Chris Lattnera0020be2009-09-08 06:27:48 +0000[diff] [blame]133const MCBinaryExpr *MCBinaryExpr::Create(Opcode Opc, const MCExpr *LHS,
134 const MCExpr *RHS, MCContext &Ctx) {
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]135 return new (Ctx) MCBinaryExpr(Opc, LHS, RHS);
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]136}
137
Chris Lattnera0020be2009-09-08 06:27:48 +0000[diff] [blame]138const MCUnaryExpr *MCUnaryExpr::Create(Opcode Opc, const MCExpr *Expr,
139 MCContext &Ctx) {
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]140 return new (Ctx) MCUnaryExpr(Opc, Expr);
141}
142
143const MCConstantExpr *MCConstantExpr::Create(int64_t Value, MCContext &Ctx) {
144 return new (Ctx) MCConstantExpr(Value);
145}
146
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]147/* *** */
148
Benjamin Kramerdd136432014-10-11 17:57:27 +0000[diff] [blame^]149MCSymbolRefExpr::MCSymbolRefExpr(const MCSymbol *Symbol, VariantKind Kind,
150 const MCAsmInfo *MAI)
151 : MCExpr(MCExpr::SymbolRef), Kind(Kind),
152 UseParensForSymbolVariant(MAI->useParensForSymbolVariant()),
153 HasSubsectionsViaSymbols(MAI->hasSubsectionsViaSymbols()),
154 Symbol(Symbol) {
155 assert(Symbol);
156}
157
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]158const MCSymbolRefExpr *MCSymbolRefExpr::Create(const MCSymbol *Sym,
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]159 VariantKind Kind,
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]160 MCContext &Ctx) {
David Peixotto8ad70b32013-12-04 22:43:20 +0000[diff] [blame]161 return new (Ctx) MCSymbolRefExpr(Sym, Kind, Ctx.getAsmInfo());
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]162}
163
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]164const MCSymbolRefExpr *MCSymbolRefExpr::Create(StringRef Name, VariantKind Kind,
165 MCContext &Ctx) {
166 return Create(Ctx.GetOrCreateSymbol(Name), Kind, Ctx);
Chris Lattner6a833f62009-09-16 01:26:31 +0000[diff] [blame]167}
168
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]169StringRef MCSymbolRefExpr::getVariantKindName(VariantKind Kind) {
170 switch (Kind) {
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]171 case VK_Invalid: return "<<invalid>>";
172 case VK_None: return "<<none>>";
173
174 case VK_GOT: return "GOT";
175 case VK_GOTOFF: return "GOTOFF";
176 case VK_GOTPCREL: return "GOTPCREL";
177 case VK_GOTTPOFF: return "GOTTPOFF";
178 case VK_INDNTPOFF: return "INDNTPOFF";
179 case VK_NTPOFF: return "NTPOFF";
Rafael Espindolab3b49bb2010-10-28 14:22:44 +0000[diff] [blame]180 case VK_GOTNTPOFF: return "GOTNTPOFF";
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]181 case VK_PLT: return "PLT";
182 case VK_TLSGD: return "TLSGD";
Rafael Espindola2dbec3f2010-10-28 15:02:40 +0000[diff] [blame]183 case VK_TLSLD: return "TLSLD";
Rafael Espindola6f23eb32010-10-28 14:37:09 +0000[diff] [blame]184 case VK_TLSLDM: return "TLSLDM";
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]185 case VK_TPOFF: return "TPOFF";
Rafael Espindolae8f08be2010-10-28 14:48:59 +0000[diff] [blame]186 case VK_DTPOFF: return "DTPOFF";
Chris Lattner94f0c142010-11-14 22:22:59 +0000[diff] [blame]187 case VK_TLVP: return "TLVP";
Tim Northover00ed9962014-03-29 10:18:08 +0000[diff] [blame]188 case VK_TLVPPAGE: return "TLVPPAGE";
189 case VK_TLVPPAGEOFF: return "TLVPPAGEOFF";
190 case VK_PAGE: return "PAGE";
191 case VK_PAGEOFF: return "PAGEOFF";
192 case VK_GOTPAGE: return "GOTPAGE";
193 case VK_GOTPAGEOFF: return "GOTPAGEOFF";
Benjamin Kramer9c9e0a22013-03-30 16:21:50 +0000[diff] [blame]194 case VK_SECREL: return "SECREL32";
Rafael Espindola7fadc0e2014-03-20 02:12:01 +0000[diff] [blame]195 case VK_WEAKREF: return "WEAKREF";
David Peixotto8ad70b32013-12-04 22:43:20 +0000[diff] [blame]196 case VK_ARM_NONE: return "none";
197 case VK_ARM_TARGET1: return "target1";
198 case VK_ARM_TARGET2: return "target2";
199 case VK_ARM_PREL31: return "prel31";
Kai Nackee51c8132014-01-20 11:00:40 +0000[diff] [blame]200 case VK_ARM_TLSLDO: return "tlsldo";
Saleem Abdulrasool6e00ca82014-01-30 04:02:31 +0000[diff] [blame]201 case VK_ARM_TLSCALL: return "tlscall";
Saleem Abdulrasoola3f12bd2014-01-30 04:02:38 +0000[diff] [blame]202 case VK_ARM_TLSDESC: return "tlsdesc";
Saleem Abdulrasool56e06e82014-01-30 04:02:47 +0000[diff] [blame]203 case VK_ARM_TLSDESCSEQ: return "tlsdescseq";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]204 case VK_PPC_LO: return "l";
Ulrich Weigande67c5652013-06-21 14:42:49 +0000[diff] [blame]205 case VK_PPC_HI: return "h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]206 case VK_PPC_HA: return "ha";
Ulrich Weigande9126f52013-06-21 14:43:42 +0000[diff] [blame]207 case VK_PPC_HIGHER: return "higher";
208 case VK_PPC_HIGHERA: return "highera";
209 case VK_PPC_HIGHEST: return "highest";
210 case VK_PPC_HIGHESTA: return "highesta";
Ulrich Weigand93372b42013-06-25 16:49:50 +0000[diff] [blame]211 case VK_PPC_GOT_LO: return "got@l";
212 case VK_PPC_GOT_HI: return "got@h";
213 case VK_PPC_GOT_HA: return "got@ha";
Ulrich Weigand68e2e1b2013-06-20 22:39:42 +0000[diff] [blame]214 case VK_PPC_TOCBASE: return "tocbase";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]215 case VK_PPC_TOC: return "toc";
216 case VK_PPC_TOC_LO: return "toc@l";
Ulrich Weigand72ddbd62013-06-21 14:43:10 +0000[diff] [blame]217 case VK_PPC_TOC_HI: return "toc@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]218 case VK_PPC_TOC_HA: return "toc@ha";
Ulrich Weigandf11efe72013-07-01 23:33:29 +0000[diff] [blame]219 case VK_PPC_DTPMOD: return "dtpmod";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]220 case VK_PPC_TPREL: return "tprel";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]221 case VK_PPC_TPREL_LO: return "tprel@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]222 case VK_PPC_TPREL_HI: return "tprel@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]223 case VK_PPC_TPREL_HA: return "tprel@ha";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]224 case VK_PPC_TPREL_HIGHER: return "tprel@higher";
225 case VK_PPC_TPREL_HIGHERA: return "tprel@highera";
226 case VK_PPC_TPREL_HIGHEST: return "tprel@highest";
227 case VK_PPC_TPREL_HIGHESTA: return "tprel@highesta";
228 case VK_PPC_DTPREL: return "dtprel";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]229 case VK_PPC_DTPREL_LO: return "dtprel@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]230 case VK_PPC_DTPREL_HI: return "dtprel@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]231 case VK_PPC_DTPREL_HA: return "dtprel@ha";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]232 case VK_PPC_DTPREL_HIGHER: return "dtprel@higher";
233 case VK_PPC_DTPREL_HIGHERA: return "dtprel@highera";
234 case VK_PPC_DTPREL_HIGHEST: return "dtprel@highest";
235 case VK_PPC_DTPREL_HIGHESTA: return "dtprel@highesta";
236 case VK_PPC_GOT_TPREL: return "got@tprel";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]237 case VK_PPC_GOT_TPREL_LO: return "got@tprel@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]238 case VK_PPC_GOT_TPREL_HI: return "got@tprel@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]239 case VK_PPC_GOT_TPREL_HA: return "got@tprel@ha";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]240 case VK_PPC_GOT_DTPREL: return "got@dtprel";
241 case VK_PPC_GOT_DTPREL_LO: return "got@dtprel@l";
242 case VK_PPC_GOT_DTPREL_HI: return "got@dtprel@h";
243 case VK_PPC_GOT_DTPREL_HA: return "got@dtprel@ha";
Bill Schmidtca4a0c92012-12-04 16:18:08 +0000[diff] [blame]244 case VK_PPC_TLS: return "tls";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]245 case VK_PPC_GOT_TLSGD: return "got@tlsgd";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]246 case VK_PPC_GOT_TLSGD_LO: return "got@tlsgd@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]247 case VK_PPC_GOT_TLSGD_HI: return "got@tlsgd@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]248 case VK_PPC_GOT_TLSGD_HA: return "got@tlsgd@ha";
Ulrich Weigand52cf8e42013-07-09 16:41:09 +0000[diff] [blame]249 case VK_PPC_TLSGD: return "tlsgd";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]250 case VK_PPC_GOT_TLSLD: return "got@tlsld";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]251 case VK_PPC_GOT_TLSLD_LO: return "got@tlsld@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]252 case VK_PPC_GOT_TLSLD_HI: return "got@tlsld@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]253 case VK_PPC_GOT_TLSLD_HA: return "got@tlsld@ha";
Ulrich Weigand52cf8e42013-07-09 16:41:09 +0000[diff] [blame]254 case VK_PPC_TLSLD: return "tlsld";
Akira Hatanakae2eed962011-12-22 01:05:17 +0000[diff] [blame]255 case VK_Mips_GPREL: return "GPREL";
256 case VK_Mips_GOT_CALL: return "GOT_CALL";
257 case VK_Mips_GOT16: return "GOT16";
258 case VK_Mips_GOT: return "GOT";
259 case VK_Mips_ABS_HI: return "ABS_HI";
260 case VK_Mips_ABS_LO: return "ABS_LO";
261 case VK_Mips_TLSGD: return "TLSGD";
262 case VK_Mips_TLSLDM: return "TLSLDM";
263 case VK_Mips_DTPREL_HI: return "DTPREL_HI";
264 case VK_Mips_DTPREL_LO: return "DTPREL_LO";
265 case VK_Mips_GOTTPREL: return "GOTTPREL";
266 case VK_Mips_TPREL_HI: return "TPREL_HI";
267 case VK_Mips_TPREL_LO: return "TPREL_LO";
268 case VK_Mips_GPOFF_HI: return "GPOFF_HI";
269 case VK_Mips_GPOFF_LO: return "GPOFF_LO";
270 case VK_Mips_GOT_DISP: return "GOT_DISP";
271 case VK_Mips_GOT_PAGE: return "GOT_PAGE";
272 case VK_Mips_GOT_OFST: return "GOT_OFST";
Akira Hatanakaf73e3622012-07-21 02:15:19 +0000[diff] [blame]273 case VK_Mips_HIGHER: return "HIGHER";
274 case VK_Mips_HIGHEST: return "HIGHEST";
Akira Hatanaka64b52d82012-11-21 19:50:22 +0000[diff] [blame]275 case VK_Mips_GOT_HI16: return "GOT_HI16";
276 case VK_Mips_GOT_LO16: return "GOT_LO16";
277 case VK_Mips_CALL_HI16: return "CALL_HI16";
278 case VK_Mips_CALL_LO16: return "CALL_LO16";
Zoran Jovanovicb355e8f2014-05-27 14:58:51 +0000[diff] [blame]279 case VK_Mips_PCREL_HI16: return "PCREL_HI16";
280 case VK_Mips_PCREL_LO16: return "PCREL_LO16";
Reid Kleckner81782f02014-09-25 02:09:18 +0000[diff] [blame]281 case VK_COFF_IMGREL32: return "IMGREL";
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]282 }
Chandler Carruthf3e85022012-01-10 18:08:01 +0000[diff] [blame]283 llvm_unreachable("Invalid variant kind");
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]284}
285
286MCSymbolRefExpr::VariantKind
287MCSymbolRefExpr::getVariantKindForName(StringRef Name) {
288 return StringSwitch<VariantKind>(Name)
289 .Case("GOT", VK_GOT)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]290 .Case("got", VK_GOT)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]291 .Case("GOTOFF", VK_GOTOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]292 .Case("gotoff", VK_GOTOFF)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]293 .Case("GOTPCREL", VK_GOTPCREL)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]294 .Case("gotpcrel", VK_GOTPCREL)
Joerg Sonnenbergerdd18d5b2014-04-29 13:42:02 +0000[diff] [blame]295 .Case("GOT_PREL", VK_GOTPCREL)
296 .Case("got_prel", VK_GOTPCREL)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]297 .Case("GOTTPOFF", VK_GOTTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]298 .Case("gottpoff", VK_GOTTPOFF)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]299 .Case("INDNTPOFF", VK_INDNTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]300 .Case("indntpoff", VK_INDNTPOFF)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]301 .Case("NTPOFF", VK_NTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]302 .Case("ntpoff", VK_NTPOFF)
Rafael Espindolab3b49bb2010-10-28 14:22:44 +0000[diff] [blame]303 .Case("GOTNTPOFF", VK_GOTNTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]304 .Case("gotntpoff", VK_GOTNTPOFF)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]305 .Case("PLT", VK_PLT)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]306 .Case("plt", VK_PLT)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]307 .Case("TLSGD", VK_TLSGD)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]308 .Case("tlsgd", VK_TLSGD)
Rafael Espindola2dbec3f2010-10-28 15:02:40 +0000[diff] [blame]309 .Case("TLSLD", VK_TLSLD)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]310 .Case("tlsld", VK_TLSLD)
Rafael Espindola6f23eb32010-10-28 14:37:09 +0000[diff] [blame]311 .Case("TLSLDM", VK_TLSLDM)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]312 .Case("tlsldm", VK_TLSLDM)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]313 .Case("TPOFF", VK_TPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]314 .Case("tpoff", VK_TPOFF)
Rafael Espindolae8f08be2010-10-28 14:48:59 +0000[diff] [blame]315 .Case("DTPOFF", VK_DTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]316 .Case("dtpoff", VK_DTPOFF)
Eric Christophere7b64dc2010-05-26 00:02:12 +0000[diff] [blame]317 .Case("TLVP", VK_TLVP)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]318 .Case("tlvp", VK_TLVP)
Tim Northover00ed9962014-03-29 10:18:08 +0000[diff] [blame]319 .Case("TLVPPAGE", VK_TLVPPAGE)
320 .Case("tlvppage", VK_TLVPPAGE)
321 .Case("TLVPPAGEOFF", VK_TLVPPAGEOFF)
322 .Case("tlvppageoff", VK_TLVPPAGEOFF)
323 .Case("PAGE", VK_PAGE)
324 .Case("page", VK_PAGE)
325 .Case("PAGEOFF", VK_PAGEOFF)
326 .Case("pageoff", VK_PAGEOFF)
327 .Case("GOTPAGE", VK_GOTPAGE)
328 .Case("gotpage", VK_GOTPAGE)
329 .Case("GOTPAGEOFF", VK_GOTPAGEOFF)
330 .Case("gotpageoff", VK_GOTPAGEOFF)
Nico Rieck1da45292013-04-10 23:28:17 +0000[diff] [blame]331 .Case("IMGREL", VK_COFF_IMGREL32)
332 .Case("imgrel", VK_COFF_IMGREL32)
Rafael Espindolab770f892013-04-25 19:27:05 +0000[diff] [blame]333 .Case("SECREL32", VK_SECREL)
334 .Case("secrel32", VK_SECREL)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]335 .Case("L", VK_PPC_LO)
336 .Case("l", VK_PPC_LO)
Ulrich Weigande67c5652013-06-21 14:42:49 +0000[diff] [blame]337 .Case("H", VK_PPC_HI)
338 .Case("h", VK_PPC_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]339 .Case("HA", VK_PPC_HA)
340 .Case("ha", VK_PPC_HA)
Ulrich Weigande9126f52013-06-21 14:43:42 +0000[diff] [blame]341 .Case("HIGHER", VK_PPC_HIGHER)
342 .Case("higher", VK_PPC_HIGHER)
343 .Case("HIGHERA", VK_PPC_HIGHERA)
344 .Case("highera", VK_PPC_HIGHERA)
345 .Case("HIGHEST", VK_PPC_HIGHEST)
346 .Case("highest", VK_PPC_HIGHEST)
347 .Case("HIGHESTA", VK_PPC_HIGHESTA)
348 .Case("highesta", VK_PPC_HIGHESTA)
Ulrich Weigand93372b42013-06-25 16:49:50 +0000[diff] [blame]349 .Case("GOT@L", VK_PPC_GOT_LO)
350 .Case("got@l", VK_PPC_GOT_LO)
351 .Case("GOT@H", VK_PPC_GOT_HI)
352 .Case("got@h", VK_PPC_GOT_HI)
353 .Case("GOT@HA", VK_PPC_GOT_HA)
354 .Case("got@ha", VK_PPC_GOT_HA)
Ulrich Weigand68e2e1b2013-06-20 22:39:42 +0000[diff] [blame]355 .Case("TOCBASE", VK_PPC_TOCBASE)
356 .Case("tocbase", VK_PPC_TOCBASE)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]357 .Case("TOC", VK_PPC_TOC)
358 .Case("toc", VK_PPC_TOC)
359 .Case("TOC@L", VK_PPC_TOC_LO)
360 .Case("toc@l", VK_PPC_TOC_LO)
Ulrich Weigand72ddbd62013-06-21 14:43:10 +0000[diff] [blame]361 .Case("TOC@H", VK_PPC_TOC_HI)
362 .Case("toc@h", VK_PPC_TOC_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]363 .Case("TOC@HA", VK_PPC_TOC_HA)
364 .Case("toc@ha", VK_PPC_TOC_HA)
Ulrich Weigand2c3a2192013-05-03 19:52:35 +0000[diff] [blame]365 .Case("TLS", VK_PPC_TLS)
366 .Case("tls", VK_PPC_TLS)
Ulrich Weigandf11efe72013-07-01 23:33:29 +0000[diff] [blame]367 .Case("DTPMOD", VK_PPC_DTPMOD)
368 .Case("dtpmod", VK_PPC_DTPMOD)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]369 .Case("TPREL", VK_PPC_TPREL)
370 .Case("tprel", VK_PPC_TPREL)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]371 .Case("TPREL@L", VK_PPC_TPREL_LO)
372 .Case("tprel@l", VK_PPC_TPREL_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]373 .Case("TPREL@H", VK_PPC_TPREL_HI)
374 .Case("tprel@h", VK_PPC_TPREL_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]375 .Case("TPREL@HA", VK_PPC_TPREL_HA)
376 .Case("tprel@ha", VK_PPC_TPREL_HA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]377 .Case("TPREL@HIGHER", VK_PPC_TPREL_HIGHER)
378 .Case("tprel@higher", VK_PPC_TPREL_HIGHER)
379 .Case("TPREL@HIGHERA", VK_PPC_TPREL_HIGHERA)
380 .Case("tprel@highera", VK_PPC_TPREL_HIGHERA)
381 .Case("TPREL@HIGHEST", VK_PPC_TPREL_HIGHEST)
382 .Case("tprel@highest", VK_PPC_TPREL_HIGHEST)
383 .Case("TPREL@HIGHESTA", VK_PPC_TPREL_HIGHESTA)
384 .Case("tprel@highesta", VK_PPC_TPREL_HIGHESTA)
385 .Case("DTPREL", VK_PPC_DTPREL)
386 .Case("dtprel", VK_PPC_DTPREL)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]387 .Case("DTPREL@L", VK_PPC_DTPREL_LO)
388 .Case("dtprel@l", VK_PPC_DTPREL_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]389 .Case("DTPREL@H", VK_PPC_DTPREL_HI)
390 .Case("dtprel@h", VK_PPC_DTPREL_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]391 .Case("DTPREL@HA", VK_PPC_DTPREL_HA)
392 .Case("dtprel@ha", VK_PPC_DTPREL_HA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]393 .Case("DTPREL@HIGHER", VK_PPC_DTPREL_HIGHER)
394 .Case("dtprel@higher", VK_PPC_DTPREL_HIGHER)
395 .Case("DTPREL@HIGHERA", VK_PPC_DTPREL_HIGHERA)
396 .Case("dtprel@highera", VK_PPC_DTPREL_HIGHERA)
397 .Case("DTPREL@HIGHEST", VK_PPC_DTPREL_HIGHEST)
398 .Case("dtprel@highest", VK_PPC_DTPREL_HIGHEST)
399 .Case("DTPREL@HIGHESTA", VK_PPC_DTPREL_HIGHESTA)
400 .Case("dtprel@highesta", VK_PPC_DTPREL_HIGHESTA)
401 .Case("GOT@TPREL", VK_PPC_GOT_TPREL)
402 .Case("got@tprel", VK_PPC_GOT_TPREL)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]403 .Case("GOT@TPREL@L", VK_PPC_GOT_TPREL_LO)
404 .Case("got@tprel@l", VK_PPC_GOT_TPREL_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]405 .Case("GOT@TPREL@H", VK_PPC_GOT_TPREL_HI)
406 .Case("got@tprel@h", VK_PPC_GOT_TPREL_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]407 .Case("GOT@TPREL@HA", VK_PPC_GOT_TPREL_HA)
408 .Case("got@tprel@ha", VK_PPC_GOT_TPREL_HA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]409 .Case("GOT@DTPREL", VK_PPC_GOT_DTPREL)
410 .Case("got@dtprel", VK_PPC_GOT_DTPREL)
411 .Case("GOT@DTPREL@L", VK_PPC_GOT_DTPREL_LO)
412 .Case("got@dtprel@l", VK_PPC_GOT_DTPREL_LO)
413 .Case("GOT@DTPREL@H", VK_PPC_GOT_DTPREL_HI)
414 .Case("got@dtprel@h", VK_PPC_GOT_DTPREL_HI)
415 .Case("GOT@DTPREL@HA", VK_PPC_GOT_DTPREL_HA)
416 .Case("got@dtprel@ha", VK_PPC_GOT_DTPREL_HA)
417 .Case("GOT@TLSGD", VK_PPC_GOT_TLSGD)
418 .Case("got@tlsgd", VK_PPC_GOT_TLSGD)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]419 .Case("GOT@TLSGD@L", VK_PPC_GOT_TLSGD_LO)
420 .Case("got@tlsgd@l", VK_PPC_GOT_TLSGD_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]421 .Case("GOT@TLSGD@H", VK_PPC_GOT_TLSGD_HI)
422 .Case("got@tlsgd@h", VK_PPC_GOT_TLSGD_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]423 .Case("GOT@TLSGD@HA", VK_PPC_GOT_TLSGD_HA)
424 .Case("got@tlsgd@ha", VK_PPC_GOT_TLSGD_HA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]425 .Case("GOT@TLSLD", VK_PPC_GOT_TLSLD)
426 .Case("got@tlsld", VK_PPC_GOT_TLSLD)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]427 .Case("GOT@TLSLD@L", VK_PPC_GOT_TLSLD_LO)
428 .Case("got@tlsld@l", VK_PPC_GOT_TLSLD_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]429 .Case("GOT@TLSLD@H", VK_PPC_GOT_TLSLD_HI)
430 .Case("got@tlsld@h", VK_PPC_GOT_TLSLD_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]431 .Case("GOT@TLSLD@HA", VK_PPC_GOT_TLSLD_HA)
432 .Case("got@tlsld@ha", VK_PPC_GOT_TLSLD_HA)
David Peixotto8ad70b32013-12-04 22:43:20 +0000[diff] [blame]433 .Case("NONE", VK_ARM_NONE)
434 .Case("none", VK_ARM_NONE)
435 .Case("TARGET1", VK_ARM_TARGET1)
436 .Case("target1", VK_ARM_TARGET1)
437 .Case("TARGET2", VK_ARM_TARGET2)
438 .Case("target2", VK_ARM_TARGET2)
439 .Case("PREL31", VK_ARM_PREL31)
440 .Case("prel31", VK_ARM_PREL31)
Kai Nackee51c8132014-01-20 11:00:40 +0000[diff] [blame]441 .Case("TLSLDO", VK_ARM_TLSLDO)
442 .Case("tlsldo", VK_ARM_TLSLDO)
Saleem Abdulrasool6e00ca82014-01-30 04:02:31 +0000[diff] [blame]443 .Case("TLSCALL", VK_ARM_TLSCALL)
444 .Case("tlscall", VK_ARM_TLSCALL)
Saleem Abdulrasoola3f12bd2014-01-30 04:02:38 +0000[diff] [blame]445 .Case("TLSDESC", VK_ARM_TLSDESC)
446 .Case("tlsdesc", VK_ARM_TLSDESC)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]447 .Default(VK_Invalid);
448}
449
Benjamin Kramerdd136432014-10-11 17:57:27 +0000[diff] [blame^]450void MCSymbolRefExpr::printVariantKind(raw_ostream &OS) const {
451 if (UseParensForSymbolVariant)
452 OS << '(' << MCSymbolRefExpr::getVariantKindName(getKind()) << ')';
453 else
454 OS << '@' << MCSymbolRefExpr::getVariantKindName(getKind());
455}
456
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]457/* *** */
458
Craig Topper2a6a08b2012-09-26 06:36:36 +0000[diff] [blame]459void MCTargetExpr::anchor() {}
Chris Lattner6a833f62009-09-16 01:26:31 +0000[diff] [blame]460
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]461/* *** */
462
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]463bool MCExpr::EvaluateAsAbsolute(int64_t &Res) const {
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]464 return EvaluateAsAbsolute(Res, nullptr, nullptr, nullptr);
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]465}
466
467bool MCExpr::EvaluateAsAbsolute(int64_t &Res,
468 const MCAsmLayout &Layout) const {
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]469 return EvaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, nullptr);
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]470}
471
472bool MCExpr::EvaluateAsAbsolute(int64_t &Res,
473 const MCAsmLayout &Layout,
474 const SectionAddrMap &Addrs) const {
475 return EvaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, &Addrs);
476}
477
478bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAssembler &Asm) const {
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]479 return EvaluateAsAbsolute(Res, &Asm, nullptr, nullptr);
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]480}
481
Rafael Espindolaadbe0242014-08-15 14:20:32 +0000[diff] [blame]482int64_t MCExpr::evaluateKnownAbsolute(const MCAsmLayout &Layout) const {
483 int64_t Res;
484 bool Abs =
485 evaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, nullptr, true);
486 (void)Abs;
487 assert(Abs && "Not actually absolute");
488 return Res;
489}
490
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]491bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
492 const MCAsmLayout *Layout,
Rafael Espindola93e3cf02010-12-07 00:27:36 +0000[diff] [blame]493 const SectionAddrMap *Addrs) const {
Rafael Espindolaadbe0242014-08-15 14:20:32 +0000[diff] [blame]494 // FIXME: The use if InSet = Addrs is a hack. Setting InSet causes us
495 // absolutize differences across sections and that is what the MachO writer
496 // uses Addrs for.
497 return evaluateAsAbsolute(Res, Asm, Layout, Addrs, Addrs);
498}
499
500bool MCExpr::evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
501 const MCAsmLayout *Layout,
502 const SectionAddrMap *Addrs, bool InSet) const {
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]503 MCValue Value;
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]504
Daniel Dunbar5cfb5872010-03-23 23:47:07 +0000[diff] [blame]505 // Fast path constants.
506 if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(this)) {
507 Res = CE->getValue();
508 return true;
509 }
510
Rafael Espindolaadbe0242014-08-15 14:20:32 +0000[diff] [blame]511 bool IsRelocatable = EvaluateAsRelocatableImpl(
512 Value, Asm, Layout, nullptr, Addrs, InSet, /*ForceVarExpansion*/ false);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]513
Rafael Espindola4124ab12010-12-22 22:16:24 +0000[diff] [blame]514 // Record the current value.
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]515 Res = Value.getConstant();
Rafael Espindola4124ab12010-12-22 22:16:24 +0000[diff] [blame]516
517 return IsRelocatable && Value.isAbsolute();
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]518}
519
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]520/// \brief Helper method for \see EvaluateSymbolAdd().
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]521static void AttemptToFoldSymbolOffsetDifference(const MCAssembler *Asm,
522 const MCAsmLayout *Layout,
523 const SectionAddrMap *Addrs,
524 bool InSet,
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]525 const MCSymbolRefExpr *&A,
526 const MCSymbolRefExpr *&B,
527 int64_t &Addend) {
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]528 if (!A || !B)
529 return;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]530
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]531 const MCSymbol &SA = A->getSymbol();
532 const MCSymbol &SB = B->getSymbol();
533
534 if (SA.isUndefined() || SB.isUndefined())
535 return;
536
537 if (!Asm->getWriter().IsSymbolRefDifferenceFullyResolved(*Asm, A, B, InSet))
538 return;
539
David Blaikie908f4d42014-04-24 16:59:40 +0000[diff] [blame]540 const MCSymbolData &AD = Asm->getSymbolData(SA);
541 const MCSymbolData &BD = Asm->getSymbolData(SB);
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]542
543 if (AD.getFragment() == BD.getFragment()) {
544 Addend += (AD.getOffset() - BD.getOffset());
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]545
Owen Anderson97462862011-03-21 23:13:43 +0000[diff] [blame]546 // Pointers to Thumb symbols need to have their low-bit set to allow
547 // for interworking.
548 if (Asm->isThumbFunc(&SA))
549 Addend |= 1;
550
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]551 // Clear the symbol expr pointers to indicate we have folded these
552 // operands.
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]553 A = B = nullptr;
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]554 return;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]555 }
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]556
557 if (!Layout)
558 return;
559
560 const MCSectionData &SecA = *AD.getFragment()->getParent();
561 const MCSectionData &SecB = *BD.getFragment()->getParent();
562
563 if ((&SecA != &SecB) && !Addrs)
564 return;
565
566 // Eagerly evaluate.
567 Addend += (Layout->getSymbolOffset(&Asm->getSymbolData(A->getSymbol())) -
568 Layout->getSymbolOffset(&Asm->getSymbolData(B->getSymbol())));
569 if (Addrs && (&SecA != &SecB))
570 Addend += (Addrs->lookup(&SecA) - Addrs->lookup(&SecB));
571
Jim Grosbach213039a2012-02-24 05:12:18 +0000[diff] [blame]572 // Pointers to Thumb symbols need to have their low-bit set to allow
573 // for interworking.
574 if (Asm->isThumbFunc(&SA))
575 Addend |= 1;
576
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]577 // Clear the symbol expr pointers to indicate we have folded these
578 // operands.
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]579 A = B = nullptr;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]580}
581
Daniel Dunbar395a0992010-12-16 18:36:25 +0000[diff] [blame]582/// \brief Evaluate the result of an add between (conceptually) two MCValues.
583///
584/// This routine conceptually attempts to construct an MCValue:
585/// Result = (Result_A - Result_B + Result_Cst)
586/// from two MCValue's LHS and RHS where
587/// Result = LHS + RHS
588/// and
589/// Result = (LHS_A - LHS_B + LHS_Cst) + (RHS_A - RHS_B + RHS_Cst).
590///
591/// This routine attempts to aggresively fold the operands such that the result
592/// is representable in an MCValue, but may not always succeed.
593///
594/// \returns True on success, false if the result is not representable in an
595/// MCValue.
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]596
597/// NOTE: It is really important to have both the Asm and Layout arguments.
598/// They might look redundant, but this function can be used before layout
599/// is done (see the object streamer for example) and having the Asm argument
Rafael Espindola1ea7f182010-12-18 04:01:45 +0000[diff] [blame]600/// lets us avoid relaxations early.
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]601static bool EvaluateSymbolicAdd(const MCAssembler *Asm,
602 const MCAsmLayout *Layout,
Rafael Espindola93e3cf02010-12-07 00:27:36 +0000[diff] [blame]603 const SectionAddrMap *Addrs,
Rafael Espindola57ab7082010-12-03 00:55:40 +0000[diff] [blame]604 bool InSet,
Rafael Espindola4262a222010-10-16 18:23:53 +0000[diff] [blame]605 const MCValue &LHS,const MCSymbolRefExpr *RHS_A,
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]606 const MCSymbolRefExpr *RHS_B, int64_t RHS_Cst,
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]607 MCValue &Res) {
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]608 // FIXME: This routine (and other evaluation parts) are *incredibly* sloppy
609 // about dealing with modifiers. This will ultimately bite us, one day.
610 const MCSymbolRefExpr *LHS_A = LHS.getSymA();
611 const MCSymbolRefExpr *LHS_B = LHS.getSymB();
612 int64_t LHS_Cst = LHS.getConstant();
613
614 // Fold the result constant immediately.
615 int64_t Result_Cst = LHS_Cst + RHS_Cst;
616
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]617 assert((!Layout || Asm) &&
618 "Must have an assembler object if layout is given!");
619
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]620 // If we have a layout, we can fold resolved differences.
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]621 if (Asm) {
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]622 // First, fold out any differences which are fully resolved. By
623 // reassociating terms in
624 // Result = (LHS_A - LHS_B + LHS_Cst) + (RHS_A - RHS_B + RHS_Cst).
625 // we have the four possible differences:
626 // (LHS_A - LHS_B),
627 // (LHS_A - RHS_B),
628 // (RHS_A - LHS_B),
629 // (RHS_A - RHS_B).
Chris Lattner0ab5e2c2011-04-15 05:18:47 +0000[diff] [blame]630 // Since we are attempting to be as aggressive as possible about folding, we
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]631 // attempt to evaluate each possible alternative.
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]632 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, LHS_A, LHS_B,
633 Result_Cst);
634 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, LHS_A, RHS_B,
635 Result_Cst);
636 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, RHS_A, LHS_B,
637 Result_Cst);
638 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, RHS_A, RHS_B,
639 Result_Cst);
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]640 }
641
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]642 // We can't represent the addition or subtraction of two symbols.
643 if ((LHS_A && RHS_A) || (LHS_B && RHS_B))
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]644 return false;
645
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]646 // At this point, we have at most one additive symbol and one subtractive
647 // symbol -- find them.
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]648 const MCSymbolRefExpr *A = LHS_A ? LHS_A : RHS_A;
649 const MCSymbolRefExpr *B = LHS_B ? LHS_B : RHS_B;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]650
651 // If we have a negated symbol, then we must have also have a non-negated
652 // symbol in order to encode the expression.
653 if (B && !A)
654 return false;
Rafael Espindola4262a222010-10-16 18:23:53 +0000[diff] [blame]655
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]656 Res = MCValue::get(A, B, Result_Cst);
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]657 return true;
658}
659
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]660bool MCExpr::EvaluateAsRelocatable(MCValue &Res,
Joerg Sonnenberger752b91b2014-08-10 11:35:12 +0000[diff] [blame]661 const MCAsmLayout *Layout,
Joerg Sonnenbergerb696d462014-08-10 11:37:07 +0000[diff] [blame]662 const MCFixup *Fixup) const {
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]663 MCAssembler *Assembler = Layout ? &Layout->getAssembler() : nullptr;
Joerg Sonnenberger752b91b2014-08-10 11:35:12 +0000[diff] [blame]664 return EvaluateAsRelocatableImpl(Res, Assembler, Layout, Fixup, nullptr,
665 false, /*ForceVarExpansion*/ false);
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]666}
667
Joerg Sonnenberger752b91b2014-08-10 11:35:12 +0000[diff] [blame]668bool MCExpr::EvaluateAsValue(MCValue &Res, const MCAsmLayout *Layout,
669 const MCFixup *Fixup) const {
Rafael Espindolabc91d7e2014-04-28 20:53:11 +0000[diff] [blame]670 MCAssembler *Assembler = Layout ? &Layout->getAssembler() : nullptr;
Joerg Sonnenberger752b91b2014-08-10 11:35:12 +0000[diff] [blame]671 return EvaluateAsRelocatableImpl(Res, Assembler, Layout, Fixup, nullptr,
672 false, /*ForceVarExpansion*/ true);
Rafael Espindolabc91d7e2014-04-28 20:53:11 +0000[diff] [blame]673}
674
675bool MCExpr::EvaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm,
Rafael Espindola4262a222010-10-16 18:23:53 +0000[diff] [blame]676 const MCAsmLayout *Layout,
Joerg Sonnenberger752b91b2014-08-10 11:35:12 +0000[diff] [blame]677 const MCFixup *Fixup,
Rafael Espindolabc91d7e2014-04-28 20:53:11 +0000[diff] [blame]678 const SectionAddrMap *Addrs, bool InSet,
679 bool ForceVarExpansion) const {
Daniel Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]680 ++stats::MCExprEvaluate;
681
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]682 switch (getKind()) {
Chris Lattner38d022e2010-02-08 19:41:07 +0000[diff] [blame]683 case Target:
Joerg Sonnenberger752b91b2014-08-10 11:35:12 +0000[diff] [blame]684 return cast<MCTargetExpr>(this)->EvaluateAsRelocatableImpl(Res, Layout,
685 Fixup);
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]686
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]687 case Constant:
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]688 Res = MCValue::get(cast<MCConstantExpr>(this)->getValue());
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]689 return true;
690
691 case SymbolRef: {
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]692 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
693 const MCSymbol &Sym = SRE->getSymbol();
Daniel Dunbar17b90272009-10-16 01:33:57 +0000[diff] [blame]694
695 // Evaluate recursively if this is a variable.
Rafael Espindola3d082fa2014-05-03 19:57:04 +0000[diff] [blame]696 if (Sym.isVariable() && SRE->getKind() == MCSymbolRefExpr::VK_None) {
Rafael Espindolabc91d7e2014-04-28 20:53:11 +0000[diff] [blame]697 if (Sym.getVariableValue()->EvaluateAsRelocatableImpl(
Joerg Sonnenberger752b91b2014-08-10 11:35:12 +0000[diff] [blame]698 Res, Asm, Layout, Fixup, Addrs, true, ForceVarExpansion)) {
Rafael Espindola7fadc0e2014-03-20 02:12:01 +0000[diff] [blame]699 const MCSymbolRefExpr *A = Res.getSymA();
700 const MCSymbolRefExpr *B = Res.getSymB();
701
Benjamin Kramerdd136432014-10-11 17:57:27 +0000[diff] [blame^]702 if (SRE->hasSubsectionsViaSymbols()) {
Rafael Espindola7fadc0e2014-03-20 02:12:01 +0000[diff] [blame]703 // FIXME: This is small hack. Given
704 // a = b + 4
705 // .long a
706 // the OS X assembler will completely drop the 4. We should probably
707 // include it in the relocation or produce an error if that is not
708 // possible.
709 if (!A && !B)
710 return true;
711 } else {
Rafael Espindolabc91d7e2014-04-28 20:53:11 +0000[diff] [blame]712 if (ForceVarExpansion)
713 return true;
Rafael Espindola7fadc0e2014-03-20 02:12:01 +0000[diff] [blame]714 bool IsSymbol = A && A->getSymbol().isDefined();
Rafael Espindolabc91d7e2014-04-28 20:53:11 +0000[diff] [blame]715 if (!IsSymbol)
Rafael Espindola7fadc0e2014-03-20 02:12:01 +0000[diff] [blame]716 return true;
717 }
718 }
Rafael Espindola8c3039b2010-11-15 16:33:49 +0000[diff] [blame]719 }
Daniel Dunbar17b90272009-10-16 01:33:57 +0000[diff] [blame]720
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]721 Res = MCValue::get(SRE, nullptr, 0);
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]722 return true;
723 }
724
725 case Unary: {
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]726 const MCUnaryExpr *AUE = cast<MCUnaryExpr>(this);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]727 MCValue Value;
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]728
Joerg Sonnenberger752b91b2014-08-10 11:35:12 +0000[diff] [blame]729 if (!AUE->getSubExpr()->EvaluateAsRelocatableImpl(Value, Asm, Layout,
730 Fixup, Addrs, InSet,
Joerg Sonnenbergerb696d462014-08-10 11:37:07 +0000[diff] [blame]731 ForceVarExpansion))
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]732 return false;
733
734 switch (AUE->getOpcode()) {
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]735 case MCUnaryExpr::LNot:
Daniel Dunbar0d5fc9a2009-07-01 06:48:00 +0000[diff] [blame]736 if (!Value.isAbsolute())
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]737 return false;
738 Res = MCValue::get(!Value.getConstant());
739 break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]740 case MCUnaryExpr::Minus:
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]741 /// -(a - b + const) ==> (b - a - const)
Daniel Dunbar7f8a9eb2009-08-11 17:47:52 +0000[diff] [blame]742 if (Value.getSymA() && !Value.getSymB())
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]743 return false;
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]744 Res = MCValue::get(Value.getSymB(), Value.getSymA(),
745 -Value.getConstant());
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]746 break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]747 case MCUnaryExpr::Not:
Daniel Dunbar0d5fc9a2009-07-01 06:48:00 +0000[diff] [blame]748 if (!Value.isAbsolute())
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]749 return false;
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]750 Res = MCValue::get(~Value.getConstant());
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]751 break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]752 case MCUnaryExpr::Plus:
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]753 Res = Value;
754 break;
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]755 }
756
757 return true;
758 }
759
760 case Binary: {
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]761 const MCBinaryExpr *ABE = cast<MCBinaryExpr>(this);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]762 MCValue LHSValue, RHSValue;
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]763
Joerg Sonnenberger752b91b2014-08-10 11:35:12 +0000[diff] [blame]764 if (!ABE->getLHS()->EvaluateAsRelocatableImpl(LHSValue, Asm, Layout,
765 Fixup, Addrs, InSet,
Joerg Sonnenbergerb696d462014-08-10 11:37:07 +0000[diff] [blame]766 ForceVarExpansion) ||
Joerg Sonnenberger752b91b2014-08-10 11:35:12 +0000[diff] [blame]767 !ABE->getRHS()->EvaluateAsRelocatableImpl(RHSValue, Asm, Layout,
768 Fixup, Addrs, InSet,
Joerg Sonnenbergerb696d462014-08-10 11:37:07 +0000[diff] [blame]769 ForceVarExpansion))
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]770 return false;
771
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]772 // We only support a few operations on non-constant expressions, handle
773 // those first.
Daniel Dunbar0d5fc9a2009-07-01 06:48:00 +0000[diff] [blame]774 if (!LHSValue.isAbsolute() || !RHSValue.isAbsolute()) {
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]775 switch (ABE->getOpcode()) {
776 default:
777 return false;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]778 case MCBinaryExpr::Sub:
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]779 // Negate RHS and add.
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]780 return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]781 RHSValue.getSymB(), RHSValue.getSymA(),
782 -RHSValue.getConstant(),
783 Res);
784
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]785 case MCBinaryExpr::Add:
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]786 return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]787 RHSValue.getSymA(), RHSValue.getSymB(),
788 RHSValue.getConstant(),
789 Res);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]790 }
791 }
792
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]793 // FIXME: We need target hooks for the evaluation. It may be limited in
Dan Gohman9a9d9ea2010-02-08 23:58:47 +0000[diff] [blame]794 // width, and gas defines the result of comparisons and right shifts
795 // differently from Apple as.
Daniel Dunbar39712732009-06-30 16:02:47 +0000[diff] [blame]796 int64_t LHS = LHSValue.getConstant(), RHS = RHSValue.getConstant();
797 int64_t Result = 0;
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]798 switch (ABE->getOpcode()) {
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]799 case MCBinaryExpr::Add: Result = LHS + RHS; break;
800 case MCBinaryExpr::And: Result = LHS & RHS; break;
801 case MCBinaryExpr::Div: Result = LHS / RHS; break;
802 case MCBinaryExpr::EQ: Result = LHS == RHS; break;
803 case MCBinaryExpr::GT: Result = LHS > RHS; break;
804 case MCBinaryExpr::GTE: Result = LHS >= RHS; break;
805 case MCBinaryExpr::LAnd: Result = LHS && RHS; break;
806 case MCBinaryExpr::LOr: Result = LHS || RHS; break;
807 case MCBinaryExpr::LT: Result = LHS < RHS; break;
808 case MCBinaryExpr::LTE: Result = LHS <= RHS; break;
809 case MCBinaryExpr::Mod: Result = LHS % RHS; break;
810 case MCBinaryExpr::Mul: Result = LHS * RHS; break;
811 case MCBinaryExpr::NE: Result = LHS != RHS; break;
812 case MCBinaryExpr::Or: Result = LHS | RHS; break;
813 case MCBinaryExpr::Shl: Result = LHS << RHS; break;
814 case MCBinaryExpr::Shr: Result = LHS >> RHS; break;
815 case MCBinaryExpr::Sub: Result = LHS - RHS; break;
816 case MCBinaryExpr::Xor: Result = LHS ^ RHS; break;
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]817 }
818
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]819 Res = MCValue::get(Result);
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]820 return true;
821 }
822 }
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]823
Craig Toppera2886c22012-02-07 05:05:23 +0000[diff] [blame]824 llvm_unreachable("Invalid assembly expression kind!");
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]825}
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]826
827const MCSection *MCExpr::FindAssociatedSection() const {
828 switch (getKind()) {
829 case Target:
830 // We never look through target specific expressions.
831 return cast<MCTargetExpr>(this)->FindAssociatedSection();
832
833 case Constant:
834 return MCSymbol::AbsolutePseudoSection;
835
836 case SymbolRef: {
837 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
838 const MCSymbol &Sym = SRE->getSymbol();
839
840 if (Sym.isDefined())
841 return &Sym.getSection();
842
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]843 return nullptr;
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]844 }
845
846 case Unary:
847 return cast<MCUnaryExpr>(this)->getSubExpr()->FindAssociatedSection();
848
849 case Binary: {
850 const MCBinaryExpr *BE = cast<MCBinaryExpr>(this);
851 const MCSection *LHS_S = BE->getLHS()->FindAssociatedSection();
852 const MCSection *RHS_S = BE->getRHS()->FindAssociatedSection();
853
854 // If either section is absolute, return the other.
855 if (LHS_S == MCSymbol::AbsolutePseudoSection)
856 return RHS_S;
857 if (RHS_S == MCSymbol::AbsolutePseudoSection)
858 return LHS_S;
859
860 // Otherwise, return the first non-null section.
861 return LHS_S ? LHS_S : RHS_S;
862 }
863 }
864
Craig Toppera2886c22012-02-07 05:05:23 +0000[diff] [blame]865 llvm_unreachable("Invalid assembly expression kind!");
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]866}