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gerrit-public.fairphone.software / toolchain / llvm-project / 00ed9964c65962e2afc8e3c83a2f7114b0ce25a0 / . / llvm / lib / MC / MCExpr.cpp
blob: 7f2c478dee58fbf0f389b8abaf012313eef0b24d [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 Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]10#define DEBUG_TYPE "mcexpr"
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]11#include "llvm/MC/MCExpr.h"
Daniel Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]12#include "llvm/ADT/Statistic.h"
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]13#include "llvm/ADT/StringSwitch.h"
David Peixotto8ad70b32013-12-04 22:43:20 +0000[diff] [blame]14#include "llvm/MC/MCAsmInfo.h"
Daniel Dunbar5c5228a2010-03-11 05:53:37 +0000[diff] [blame]15#include "llvm/MC/MCAsmLayout.h"
16#include "llvm/MC/MCAssembler.h"
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]17#include "llvm/MC/MCContext.h"
Craig Topper6e80c282012-03-26 06:58:25 +0000[diff] [blame]18#include "llvm/MC/MCObjectWriter.h"
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]19#include "llvm/MC/MCSymbol.h"
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]20#include "llvm/MC/MCValue.h"
David Greenea8cbfb82010-01-05 01:28:07 +0000[diff] [blame]21#include "llvm/Support/Debug.h"
Chandler Carruthf3e85022012-01-10 18:08:01 +0000[diff] [blame]22#include "llvm/Support/ErrorHandling.h"
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]23#include "llvm/Support/raw_ostream.h"
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]24using namespace llvm;
25
Daniel Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]26namespace {
27namespace stats {
28STATISTIC(MCExprEvaluate, "Number of MCExpr evaluations");
29}
30}
31
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]32void MCExpr::print(raw_ostream &OS) const {
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]33 switch (getKind()) {
Chris Lattner38d022e2010-02-08 19:41:07 +0000[diff] [blame]34 case MCExpr::Target:
35 return cast<MCTargetExpr>(this)->PrintImpl(OS);
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]36 case MCExpr::Constant:
37 OS << cast<MCConstantExpr>(*this).getValue();
38 return;
39
Chris Lattner22833a32009-09-08 23:20:50 +0000[diff] [blame]40 case MCExpr::SymbolRef: {
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]41 const MCSymbolRefExpr &SRE = cast<MCSymbolRefExpr>(*this);
42 const MCSymbol &Sym = SRE.getSymbol();
Chris Lattneredb9d842010-11-15 02:46:57 +0000[diff] [blame]43 // Parenthesize names that start with $ so that they don't look like
44 // absolute names.
45 bool UseParens = Sym.getName()[0] == '$';
Chris Lattneredb9d842010-11-15 02:46:57 +0000[diff] [blame]46 if (UseParens)
Chris Lattner8b5d55e2010-01-17 21:43:43 +0000[diff] [blame]47 OS << '(' << Sym << ')';
48 else
49 OS << Sym;
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]50
David Peixotto8ad70b32013-12-04 22:43:20 +0000[diff] [blame]51 if (SRE.getKind() != MCSymbolRefExpr::VK_None) {
52 if (SRE.getMCAsmInfo().useParensForSymbolVariant())
53 OS << '(' << MCSymbolRefExpr::getVariantKindName(SRE.getKind()) << ')';
54 else
55 OS << '@' << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
56 }
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]57
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]58 return;
Chris Lattner22833a32009-09-08 23:20:50 +0000[diff] [blame]59 }
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]60
61 case MCExpr::Unary: {
62 const MCUnaryExpr &UE = cast<MCUnaryExpr>(*this);
63 switch (UE.getOpcode()) {
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]64 case MCUnaryExpr::LNot: OS << '!'; break;
65 case MCUnaryExpr::Minus: OS << '-'; break;
66 case MCUnaryExpr::Not: OS << '~'; break;
67 case MCUnaryExpr::Plus: OS << '+'; break;
68 }
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]69 OS << *UE.getSubExpr();
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]70 return;
71 }
72
73 case MCExpr::Binary: {
74 const MCBinaryExpr &BE = cast<MCBinaryExpr>(*this);
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]75
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]76 // Only print parens around the LHS if it is non-trivial.
77 if (isa<MCConstantExpr>(BE.getLHS()) || isa<MCSymbolRefExpr>(BE.getLHS())) {
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]78 OS << *BE.getLHS();
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]79 } else {
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]80 OS << '(' << *BE.getLHS() << ')';
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]81 }
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]82
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]83 switch (BE.getOpcode()) {
Chris Lattner7975b8f2009-09-08 06:37:35 +0000[diff] [blame]84 case MCBinaryExpr::Add:
85 // Print "X-42" instead of "X+-42".
86 if (const MCConstantExpr *RHSC = dyn_cast<MCConstantExpr>(BE.getRHS())) {
87 if (RHSC->getValue() < 0) {
88 OS << RHSC->getValue();
89 return;
90 }
91 }
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]92
Chris Lattner7975b8f2009-09-08 06:37:35 +0000[diff] [blame]93 OS << '+';
94 break;
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]95 case MCBinaryExpr::And: OS << '&'; break;
96 case MCBinaryExpr::Div: OS << '/'; break;
97 case MCBinaryExpr::EQ: OS << "=="; break;
98 case MCBinaryExpr::GT: OS << '>'; break;
99 case MCBinaryExpr::GTE: OS << ">="; break;
100 case MCBinaryExpr::LAnd: OS << "&&"; break;
101 case MCBinaryExpr::LOr: OS << "||"; break;
102 case MCBinaryExpr::LT: OS << '<'; break;
103 case MCBinaryExpr::LTE: OS << "<="; break;
104 case MCBinaryExpr::Mod: OS << '%'; break;
105 case MCBinaryExpr::Mul: OS << '*'; break;
106 case MCBinaryExpr::NE: OS << "!="; break;
107 case MCBinaryExpr::Or: OS << '|'; break;
108 case MCBinaryExpr::Shl: OS << "<<"; break;
109 case MCBinaryExpr::Shr: OS << ">>"; break;
110 case MCBinaryExpr::Sub: OS << '-'; break;
111 case MCBinaryExpr::Xor: OS << '^'; break;
112 }
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]113
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]114 // Only print parens around the LHS if it is non-trivial.
115 if (isa<MCConstantExpr>(BE.getRHS()) || isa<MCSymbolRefExpr>(BE.getRHS())) {
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]116 OS << *BE.getRHS();
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]117 } else {
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]118 OS << '(' << *BE.getRHS() << ')';
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]119 }
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]120 return;
121 }
122 }
123
Craig Toppera2886c22012-02-07 05:05:23 +0000[diff] [blame]124 llvm_unreachable("Invalid expression kind!");
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]125}
126
Manman Ren49d684e2012-09-12 05:06:18 +0000[diff] [blame]127#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]128void MCExpr::dump() const {
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]129 print(dbgs());
David Greenea8cbfb82010-01-05 01:28:07 +0000[diff] [blame]130 dbgs() << '\n';
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]131}
Manman Renc3366cc2012-09-06 19:55:56 +0000[diff] [blame]132#endif
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]133
134/* *** */
135
Chris Lattnera0020be2009-09-08 06:27:48 +0000[diff] [blame]136const MCBinaryExpr *MCBinaryExpr::Create(Opcode Opc, const MCExpr *LHS,
137 const MCExpr *RHS, MCContext &Ctx) {
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]138 return new (Ctx) MCBinaryExpr(Opc, LHS, RHS);
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]139}
140
Chris Lattnera0020be2009-09-08 06:27:48 +0000[diff] [blame]141const MCUnaryExpr *MCUnaryExpr::Create(Opcode Opc, const MCExpr *Expr,
142 MCContext &Ctx) {
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]143 return new (Ctx) MCUnaryExpr(Opc, Expr);
144}
145
146const MCConstantExpr *MCConstantExpr::Create(int64_t Value, MCContext &Ctx) {
147 return new (Ctx) MCConstantExpr(Value);
148}
149
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]150/* *** */
151
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]152const MCSymbolRefExpr *MCSymbolRefExpr::Create(const MCSymbol *Sym,
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]153 VariantKind Kind,
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]154 MCContext &Ctx) {
David Peixotto8ad70b32013-12-04 22:43:20 +0000[diff] [blame]155 return new (Ctx) MCSymbolRefExpr(Sym, Kind, Ctx.getAsmInfo());
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]156}
157
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]158const MCSymbolRefExpr *MCSymbolRefExpr::Create(StringRef Name, VariantKind Kind,
159 MCContext &Ctx) {
160 return Create(Ctx.GetOrCreateSymbol(Name), Kind, Ctx);
Chris Lattner6a833f62009-09-16 01:26:31 +0000[diff] [blame]161}
162
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]163StringRef MCSymbolRefExpr::getVariantKindName(VariantKind Kind) {
164 switch (Kind) {
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]165 case VK_Invalid: return "<<invalid>>";
166 case VK_None: return "<<none>>";
167
168 case VK_GOT: return "GOT";
169 case VK_GOTOFF: return "GOTOFF";
170 case VK_GOTPCREL: return "GOTPCREL";
171 case VK_GOTTPOFF: return "GOTTPOFF";
172 case VK_INDNTPOFF: return "INDNTPOFF";
173 case VK_NTPOFF: return "NTPOFF";
Rafael Espindolab3b49bb2010-10-28 14:22:44 +0000[diff] [blame]174 case VK_GOTNTPOFF: return "GOTNTPOFF";
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]175 case VK_PLT: return "PLT";
176 case VK_TLSGD: return "TLSGD";
Rafael Espindola2dbec3f2010-10-28 15:02:40 +0000[diff] [blame]177 case VK_TLSLD: return "TLSLD";
Rafael Espindola6f23eb32010-10-28 14:37:09 +0000[diff] [blame]178 case VK_TLSLDM: return "TLSLDM";
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]179 case VK_TPOFF: return "TPOFF";
Rafael Espindolae8f08be2010-10-28 14:48:59 +0000[diff] [blame]180 case VK_DTPOFF: return "DTPOFF";
Chris Lattner94f0c142010-11-14 22:22:59 +0000[diff] [blame]181 case VK_TLVP: return "TLVP";
Tim Northover00ed9962014-03-29 10:18:08 +0000[diff] [blame^]182 case VK_TLVPPAGE: return "TLVPPAGE";
183 case VK_TLVPPAGEOFF: return "TLVPPAGEOFF";
184 case VK_PAGE: return "PAGE";
185 case VK_PAGEOFF: return "PAGEOFF";
186 case VK_GOTPAGE: return "GOTPAGE";
187 case VK_GOTPAGEOFF: return "GOTPAGEOFF";
Benjamin Kramer9c9e0a22013-03-30 16:21:50 +0000[diff] [blame]188 case VK_SECREL: return "SECREL32";
Rafael Espindola7fadc0e2014-03-20 02:12:01 +0000[diff] [blame]189 case VK_WEAKREF: return "WEAKREF";
David Peixotto8ad70b32013-12-04 22:43:20 +0000[diff] [blame]190 case VK_ARM_NONE: return "none";
191 case VK_ARM_TARGET1: return "target1";
192 case VK_ARM_TARGET2: return "target2";
193 case VK_ARM_PREL31: return "prel31";
Kai Nackee51c8132014-01-20 11:00:40 +0000[diff] [blame]194 case VK_ARM_TLSLDO: return "tlsldo";
Saleem Abdulrasool6e00ca82014-01-30 04:02:31 +0000[diff] [blame]195 case VK_ARM_TLSCALL: return "tlscall";
Saleem Abdulrasoola3f12bd2014-01-30 04:02:38 +0000[diff] [blame]196 case VK_ARM_TLSDESC: return "tlsdesc";
Saleem Abdulrasool56e06e82014-01-30 04:02:47 +0000[diff] [blame]197 case VK_ARM_TLSDESCSEQ: return "tlsdescseq";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]198 case VK_PPC_LO: return "l";
Ulrich Weigande67c5652013-06-21 14:42:49 +0000[diff] [blame]199 case VK_PPC_HI: return "h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]200 case VK_PPC_HA: return "ha";
Ulrich Weigande9126f52013-06-21 14:43:42 +0000[diff] [blame]201 case VK_PPC_HIGHER: return "higher";
202 case VK_PPC_HIGHERA: return "highera";
203 case VK_PPC_HIGHEST: return "highest";
204 case VK_PPC_HIGHESTA: return "highesta";
Ulrich Weigand93372b42013-06-25 16:49:50 +0000[diff] [blame]205 case VK_PPC_GOT_LO: return "got@l";
206 case VK_PPC_GOT_HI: return "got@h";
207 case VK_PPC_GOT_HA: return "got@ha";
Ulrich Weigand68e2e1b2013-06-20 22:39:42 +0000[diff] [blame]208 case VK_PPC_TOCBASE: return "tocbase";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]209 case VK_PPC_TOC: return "toc";
210 case VK_PPC_TOC_LO: return "toc@l";
Ulrich Weigand72ddbd62013-06-21 14:43:10 +0000[diff] [blame]211 case VK_PPC_TOC_HI: return "toc@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]212 case VK_PPC_TOC_HA: return "toc@ha";
Ulrich Weigandf11efe72013-07-01 23:33:29 +0000[diff] [blame]213 case VK_PPC_DTPMOD: return "dtpmod";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]214 case VK_PPC_TPREL: return "tprel";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]215 case VK_PPC_TPREL_LO: return "tprel@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]216 case VK_PPC_TPREL_HI: return "tprel@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]217 case VK_PPC_TPREL_HA: return "tprel@ha";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]218 case VK_PPC_TPREL_HIGHER: return "tprel@higher";
219 case VK_PPC_TPREL_HIGHERA: return "tprel@highera";
220 case VK_PPC_TPREL_HIGHEST: return "tprel@highest";
221 case VK_PPC_TPREL_HIGHESTA: return "tprel@highesta";
222 case VK_PPC_DTPREL: return "dtprel";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]223 case VK_PPC_DTPREL_LO: return "dtprel@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]224 case VK_PPC_DTPREL_HI: return "dtprel@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]225 case VK_PPC_DTPREL_HA: return "dtprel@ha";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]226 case VK_PPC_DTPREL_HIGHER: return "dtprel@higher";
227 case VK_PPC_DTPREL_HIGHERA: return "dtprel@highera";
228 case VK_PPC_DTPREL_HIGHEST: return "dtprel@highest";
229 case VK_PPC_DTPREL_HIGHESTA: return "dtprel@highesta";
230 case VK_PPC_GOT_TPREL: return "got@tprel";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]231 case VK_PPC_GOT_TPREL_LO: return "got@tprel@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]232 case VK_PPC_GOT_TPREL_HI: return "got@tprel@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]233 case VK_PPC_GOT_TPREL_HA: return "got@tprel@ha";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]234 case VK_PPC_GOT_DTPREL: return "got@dtprel";
235 case VK_PPC_GOT_DTPREL_LO: return "got@dtprel@l";
236 case VK_PPC_GOT_DTPREL_HI: return "got@dtprel@h";
237 case VK_PPC_GOT_DTPREL_HA: return "got@dtprel@ha";
Bill Schmidtca4a0c92012-12-04 16:18:08 +0000[diff] [blame]238 case VK_PPC_TLS: return "tls";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]239 case VK_PPC_GOT_TLSGD: return "got@tlsgd";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]240 case VK_PPC_GOT_TLSGD_LO: return "got@tlsgd@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]241 case VK_PPC_GOT_TLSGD_HI: return "got@tlsgd@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]242 case VK_PPC_GOT_TLSGD_HA: return "got@tlsgd@ha";
Ulrich Weigand52cf8e42013-07-09 16:41:09 +0000[diff] [blame]243 case VK_PPC_TLSGD: return "tlsgd";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]244 case VK_PPC_GOT_TLSLD: return "got@tlsld";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]245 case VK_PPC_GOT_TLSLD_LO: return "got@tlsld@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]246 case VK_PPC_GOT_TLSLD_HI: return "got@tlsld@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]247 case VK_PPC_GOT_TLSLD_HA: return "got@tlsld@ha";
Ulrich Weigand52cf8e42013-07-09 16:41:09 +0000[diff] [blame]248 case VK_PPC_TLSLD: return "tlsld";
Akira Hatanakae2eed962011-12-22 01:05:17 +0000[diff] [blame]249 case VK_Mips_GPREL: return "GPREL";
250 case VK_Mips_GOT_CALL: return "GOT_CALL";
251 case VK_Mips_GOT16: return "GOT16";
252 case VK_Mips_GOT: return "GOT";
253 case VK_Mips_ABS_HI: return "ABS_HI";
254 case VK_Mips_ABS_LO: return "ABS_LO";
255 case VK_Mips_TLSGD: return "TLSGD";
256 case VK_Mips_TLSLDM: return "TLSLDM";
257 case VK_Mips_DTPREL_HI: return "DTPREL_HI";
258 case VK_Mips_DTPREL_LO: return "DTPREL_LO";
259 case VK_Mips_GOTTPREL: return "GOTTPREL";
260 case VK_Mips_TPREL_HI: return "TPREL_HI";
261 case VK_Mips_TPREL_LO: return "TPREL_LO";
262 case VK_Mips_GPOFF_HI: return "GPOFF_HI";
263 case VK_Mips_GPOFF_LO: return "GPOFF_LO";
264 case VK_Mips_GOT_DISP: return "GOT_DISP";
265 case VK_Mips_GOT_PAGE: return "GOT_PAGE";
266 case VK_Mips_GOT_OFST: return "GOT_OFST";
Akira Hatanakaf73e3622012-07-21 02:15:19 +0000[diff] [blame]267 case VK_Mips_HIGHER: return "HIGHER";
268 case VK_Mips_HIGHEST: return "HIGHEST";
Akira Hatanaka64b52d82012-11-21 19:50:22 +0000[diff] [blame]269 case VK_Mips_GOT_HI16: return "GOT_HI16";
270 case VK_Mips_GOT_LO16: return "GOT_LO16";
271 case VK_Mips_CALL_HI16: return "CALL_HI16";
272 case VK_Mips_CALL_LO16: return "CALL_LO16";
Nico Rieck1da45292013-04-10 23:28:17 +0000[diff] [blame]273 case VK_COFF_IMGREL32: return "IMGREL32";
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]274 }
Chandler Carruthf3e85022012-01-10 18:08:01 +0000[diff] [blame]275 llvm_unreachable("Invalid variant kind");
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]276}
277
278MCSymbolRefExpr::VariantKind
279MCSymbolRefExpr::getVariantKindForName(StringRef Name) {
280 return StringSwitch<VariantKind>(Name)
281 .Case("GOT", VK_GOT)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]282 .Case("got", VK_GOT)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]283 .Case("GOTOFF", VK_GOTOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]284 .Case("gotoff", VK_GOTOFF)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]285 .Case("GOTPCREL", VK_GOTPCREL)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]286 .Case("gotpcrel", VK_GOTPCREL)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]287 .Case("GOTTPOFF", VK_GOTTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]288 .Case("gottpoff", VK_GOTTPOFF)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]289 .Case("INDNTPOFF", VK_INDNTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]290 .Case("indntpoff", VK_INDNTPOFF)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]291 .Case("NTPOFF", VK_NTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]292 .Case("ntpoff", VK_NTPOFF)
Rafael Espindolab3b49bb2010-10-28 14:22:44 +0000[diff] [blame]293 .Case("GOTNTPOFF", VK_GOTNTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]294 .Case("gotntpoff", VK_GOTNTPOFF)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]295 .Case("PLT", VK_PLT)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]296 .Case("plt", VK_PLT)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]297 .Case("TLSGD", VK_TLSGD)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]298 .Case("tlsgd", VK_TLSGD)
Rafael Espindola2dbec3f2010-10-28 15:02:40 +0000[diff] [blame]299 .Case("TLSLD", VK_TLSLD)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]300 .Case("tlsld", VK_TLSLD)
Rafael Espindola6f23eb32010-10-28 14:37:09 +0000[diff] [blame]301 .Case("TLSLDM", VK_TLSLDM)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]302 .Case("tlsldm", VK_TLSLDM)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]303 .Case("TPOFF", VK_TPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]304 .Case("tpoff", VK_TPOFF)
Rafael Espindolae8f08be2010-10-28 14:48:59 +0000[diff] [blame]305 .Case("DTPOFF", VK_DTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]306 .Case("dtpoff", VK_DTPOFF)
Eric Christophere7b64dc2010-05-26 00:02:12 +0000[diff] [blame]307 .Case("TLVP", VK_TLVP)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]308 .Case("tlvp", VK_TLVP)
Tim Northover00ed9962014-03-29 10:18:08 +0000[diff] [blame^]309 .Case("TLVPPAGE", VK_TLVPPAGE)
310 .Case("tlvppage", VK_TLVPPAGE)
311 .Case("TLVPPAGEOFF", VK_TLVPPAGEOFF)
312 .Case("tlvppageoff", VK_TLVPPAGEOFF)
313 .Case("PAGE", VK_PAGE)
314 .Case("page", VK_PAGE)
315 .Case("PAGEOFF", VK_PAGEOFF)
316 .Case("pageoff", VK_PAGEOFF)
317 .Case("GOTPAGE", VK_GOTPAGE)
318 .Case("gotpage", VK_GOTPAGE)
319 .Case("GOTPAGEOFF", VK_GOTPAGEOFF)
320 .Case("gotpageoff", VK_GOTPAGEOFF)
Nico Rieck1da45292013-04-10 23:28:17 +0000[diff] [blame]321 .Case("IMGREL", VK_COFF_IMGREL32)
322 .Case("imgrel", VK_COFF_IMGREL32)
Rafael Espindolab770f892013-04-25 19:27:05 +0000[diff] [blame]323 .Case("SECREL32", VK_SECREL)
324 .Case("secrel32", VK_SECREL)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]325 .Case("L", VK_PPC_LO)
326 .Case("l", VK_PPC_LO)
Ulrich Weigande67c5652013-06-21 14:42:49 +0000[diff] [blame]327 .Case("H", VK_PPC_HI)
328 .Case("h", VK_PPC_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]329 .Case("HA", VK_PPC_HA)
330 .Case("ha", VK_PPC_HA)
Ulrich Weigande9126f52013-06-21 14:43:42 +0000[diff] [blame]331 .Case("HIGHER", VK_PPC_HIGHER)
332 .Case("higher", VK_PPC_HIGHER)
333 .Case("HIGHERA", VK_PPC_HIGHERA)
334 .Case("highera", VK_PPC_HIGHERA)
335 .Case("HIGHEST", VK_PPC_HIGHEST)
336 .Case("highest", VK_PPC_HIGHEST)
337 .Case("HIGHESTA", VK_PPC_HIGHESTA)
338 .Case("highesta", VK_PPC_HIGHESTA)
Ulrich Weigand93372b42013-06-25 16:49:50 +0000[diff] [blame]339 .Case("GOT@L", VK_PPC_GOT_LO)
340 .Case("got@l", VK_PPC_GOT_LO)
341 .Case("GOT@H", VK_PPC_GOT_HI)
342 .Case("got@h", VK_PPC_GOT_HI)
343 .Case("GOT@HA", VK_PPC_GOT_HA)
344 .Case("got@ha", VK_PPC_GOT_HA)
Ulrich Weigand68e2e1b2013-06-20 22:39:42 +0000[diff] [blame]345 .Case("TOCBASE", VK_PPC_TOCBASE)
346 .Case("tocbase", VK_PPC_TOCBASE)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]347 .Case("TOC", VK_PPC_TOC)
348 .Case("toc", VK_PPC_TOC)
349 .Case("TOC@L", VK_PPC_TOC_LO)
350 .Case("toc@l", VK_PPC_TOC_LO)
Ulrich Weigand72ddbd62013-06-21 14:43:10 +0000[diff] [blame]351 .Case("TOC@H", VK_PPC_TOC_HI)
352 .Case("toc@h", VK_PPC_TOC_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]353 .Case("TOC@HA", VK_PPC_TOC_HA)
354 .Case("toc@ha", VK_PPC_TOC_HA)
Ulrich Weigand2c3a2192013-05-03 19:52:35 +0000[diff] [blame]355 .Case("TLS", VK_PPC_TLS)
356 .Case("tls", VK_PPC_TLS)
Ulrich Weigandf11efe72013-07-01 23:33:29 +0000[diff] [blame]357 .Case("DTPMOD", VK_PPC_DTPMOD)
358 .Case("dtpmod", VK_PPC_DTPMOD)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]359 .Case("TPREL", VK_PPC_TPREL)
360 .Case("tprel", VK_PPC_TPREL)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]361 .Case("TPREL@L", VK_PPC_TPREL_LO)
362 .Case("tprel@l", VK_PPC_TPREL_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]363 .Case("TPREL@H", VK_PPC_TPREL_HI)
364 .Case("tprel@h", VK_PPC_TPREL_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]365 .Case("TPREL@HA", VK_PPC_TPREL_HA)
366 .Case("tprel@ha", VK_PPC_TPREL_HA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]367 .Case("TPREL@HIGHER", VK_PPC_TPREL_HIGHER)
368 .Case("tprel@higher", VK_PPC_TPREL_HIGHER)
369 .Case("TPREL@HIGHERA", VK_PPC_TPREL_HIGHERA)
370 .Case("tprel@highera", VK_PPC_TPREL_HIGHERA)
371 .Case("TPREL@HIGHEST", VK_PPC_TPREL_HIGHEST)
372 .Case("tprel@highest", VK_PPC_TPREL_HIGHEST)
373 .Case("TPREL@HIGHESTA", VK_PPC_TPREL_HIGHESTA)
374 .Case("tprel@highesta", VK_PPC_TPREL_HIGHESTA)
375 .Case("DTPREL", VK_PPC_DTPREL)
376 .Case("dtprel", VK_PPC_DTPREL)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]377 .Case("DTPREL@L", VK_PPC_DTPREL_LO)
378 .Case("dtprel@l", VK_PPC_DTPREL_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]379 .Case("DTPREL@H", VK_PPC_DTPREL_HI)
380 .Case("dtprel@h", VK_PPC_DTPREL_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]381 .Case("DTPREL@HA", VK_PPC_DTPREL_HA)
382 .Case("dtprel@ha", VK_PPC_DTPREL_HA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]383 .Case("DTPREL@HIGHER", VK_PPC_DTPREL_HIGHER)
384 .Case("dtprel@higher", VK_PPC_DTPREL_HIGHER)
385 .Case("DTPREL@HIGHERA", VK_PPC_DTPREL_HIGHERA)
386 .Case("dtprel@highera", VK_PPC_DTPREL_HIGHERA)
387 .Case("DTPREL@HIGHEST", VK_PPC_DTPREL_HIGHEST)
388 .Case("dtprel@highest", VK_PPC_DTPREL_HIGHEST)
389 .Case("DTPREL@HIGHESTA", VK_PPC_DTPREL_HIGHESTA)
390 .Case("dtprel@highesta", VK_PPC_DTPREL_HIGHESTA)
391 .Case("GOT@TPREL", VK_PPC_GOT_TPREL)
392 .Case("got@tprel", VK_PPC_GOT_TPREL)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]393 .Case("GOT@TPREL@L", VK_PPC_GOT_TPREL_LO)
394 .Case("got@tprel@l", VK_PPC_GOT_TPREL_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]395 .Case("GOT@TPREL@H", VK_PPC_GOT_TPREL_HI)
396 .Case("got@tprel@h", VK_PPC_GOT_TPREL_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]397 .Case("GOT@TPREL@HA", VK_PPC_GOT_TPREL_HA)
398 .Case("got@tprel@ha", VK_PPC_GOT_TPREL_HA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]399 .Case("GOT@DTPREL", VK_PPC_GOT_DTPREL)
400 .Case("got@dtprel", VK_PPC_GOT_DTPREL)
401 .Case("GOT@DTPREL@L", VK_PPC_GOT_DTPREL_LO)
402 .Case("got@dtprel@l", VK_PPC_GOT_DTPREL_LO)
403 .Case("GOT@DTPREL@H", VK_PPC_GOT_DTPREL_HI)
404 .Case("got@dtprel@h", VK_PPC_GOT_DTPREL_HI)
405 .Case("GOT@DTPREL@HA", VK_PPC_GOT_DTPREL_HA)
406 .Case("got@dtprel@ha", VK_PPC_GOT_DTPREL_HA)
407 .Case("GOT@TLSGD", VK_PPC_GOT_TLSGD)
408 .Case("got@tlsgd", VK_PPC_GOT_TLSGD)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]409 .Case("GOT@TLSGD@L", VK_PPC_GOT_TLSGD_LO)
410 .Case("got@tlsgd@l", VK_PPC_GOT_TLSGD_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]411 .Case("GOT@TLSGD@H", VK_PPC_GOT_TLSGD_HI)
412 .Case("got@tlsgd@h", VK_PPC_GOT_TLSGD_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]413 .Case("GOT@TLSGD@HA", VK_PPC_GOT_TLSGD_HA)
414 .Case("got@tlsgd@ha", VK_PPC_GOT_TLSGD_HA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]415 .Case("GOT@TLSLD", VK_PPC_GOT_TLSLD)
416 .Case("got@tlsld", VK_PPC_GOT_TLSLD)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]417 .Case("GOT@TLSLD@L", VK_PPC_GOT_TLSLD_LO)
418 .Case("got@tlsld@l", VK_PPC_GOT_TLSLD_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]419 .Case("GOT@TLSLD@H", VK_PPC_GOT_TLSLD_HI)
420 .Case("got@tlsld@h", VK_PPC_GOT_TLSLD_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]421 .Case("GOT@TLSLD@HA", VK_PPC_GOT_TLSLD_HA)
422 .Case("got@tlsld@ha", VK_PPC_GOT_TLSLD_HA)
David Peixotto8ad70b32013-12-04 22:43:20 +0000[diff] [blame]423 .Case("NONE", VK_ARM_NONE)
424 .Case("none", VK_ARM_NONE)
425 .Case("TARGET1", VK_ARM_TARGET1)
426 .Case("target1", VK_ARM_TARGET1)
427 .Case("TARGET2", VK_ARM_TARGET2)
428 .Case("target2", VK_ARM_TARGET2)
429 .Case("PREL31", VK_ARM_PREL31)
430 .Case("prel31", VK_ARM_PREL31)
Kai Nackee51c8132014-01-20 11:00:40 +0000[diff] [blame]431 .Case("TLSLDO", VK_ARM_TLSLDO)
432 .Case("tlsldo", VK_ARM_TLSLDO)
Saleem Abdulrasool6e00ca82014-01-30 04:02:31 +0000[diff] [blame]433 .Case("TLSCALL", VK_ARM_TLSCALL)
434 .Case("tlscall", VK_ARM_TLSCALL)
Saleem Abdulrasoola3f12bd2014-01-30 04:02:38 +0000[diff] [blame]435 .Case("TLSDESC", VK_ARM_TLSDESC)
436 .Case("tlsdesc", VK_ARM_TLSDESC)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]437 .Default(VK_Invalid);
438}
439
440/* *** */
441
Craig Topper2a6a08b2012-09-26 06:36:36 +0000[diff] [blame]442void MCTargetExpr::anchor() {}
Chris Lattner6a833f62009-09-16 01:26:31 +0000[diff] [blame]443
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]444/* *** */
445
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]446bool MCExpr::EvaluateAsAbsolute(int64_t &Res) const {
447 return EvaluateAsAbsolute(Res, 0, 0, 0);
448}
449
450bool MCExpr::EvaluateAsAbsolute(int64_t &Res,
451 const MCAsmLayout &Layout) const {
452 return EvaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, 0);
453}
454
455bool MCExpr::EvaluateAsAbsolute(int64_t &Res,
456 const MCAsmLayout &Layout,
457 const SectionAddrMap &Addrs) const {
458 return EvaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, &Addrs);
459}
460
461bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAssembler &Asm) const {
462 return EvaluateAsAbsolute(Res, &Asm, 0, 0);
463}
464
465bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
466 const MCAsmLayout *Layout,
Rafael Espindola93e3cf02010-12-07 00:27:36 +0000[diff] [blame]467 const SectionAddrMap *Addrs) const {
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]468 MCValue Value;
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]469
Daniel Dunbar5cfb5872010-03-23 23:47:07 +0000[diff] [blame]470 // Fast path constants.
471 if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(this)) {
472 Res = CE->getValue();
473 return true;
474 }
475
Rafael Espindola293a7c12010-12-18 04:19:20 +0000[diff] [blame]476 // FIXME: The use if InSet = Addrs is a hack. Setting InSet causes us
477 // absolutize differences across sections and that is what the MachO writer
478 // uses Addrs for.
Rafael Espindola4124ab12010-12-22 22:16:24 +0000[diff] [blame]479 bool IsRelocatable =
480 EvaluateAsRelocatableImpl(Value, Asm, Layout, Addrs, /*InSet*/ Addrs);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]481
Rafael Espindola4124ab12010-12-22 22:16:24 +0000[diff] [blame]482 // Record the current value.
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]483 Res = Value.getConstant();
Rafael Espindola4124ab12010-12-22 22:16:24 +0000[diff] [blame]484
485 return IsRelocatable && Value.isAbsolute();
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]486}
487
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]488/// \brief Helper method for \see EvaluateSymbolAdd().
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]489static void AttemptToFoldSymbolOffsetDifference(const MCAssembler *Asm,
490 const MCAsmLayout *Layout,
491 const SectionAddrMap *Addrs,
492 bool InSet,
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]493 const MCSymbolRefExpr *&A,
494 const MCSymbolRefExpr *&B,
495 int64_t &Addend) {
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]496 if (!A || !B)
497 return;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]498
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]499 const MCSymbol &SA = A->getSymbol();
500 const MCSymbol &SB = B->getSymbol();
501
502 if (SA.isUndefined() || SB.isUndefined())
503 return;
504
505 if (!Asm->getWriter().IsSymbolRefDifferenceFullyResolved(*Asm, A, B, InSet))
506 return;
507
508 MCSymbolData &AD = Asm->getSymbolData(SA);
509 MCSymbolData &BD = Asm->getSymbolData(SB);
510
511 if (AD.getFragment() == BD.getFragment()) {
512 Addend += (AD.getOffset() - BD.getOffset());
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]513
Owen Anderson97462862011-03-21 23:13:43 +0000[diff] [blame]514 // Pointers to Thumb symbols need to have their low-bit set to allow
515 // for interworking.
516 if (Asm->isThumbFunc(&SA))
517 Addend |= 1;
518
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]519 // Clear the symbol expr pointers to indicate we have folded these
520 // operands.
521 A = B = 0;
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]522 return;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]523 }
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]524
525 if (!Layout)
526 return;
527
528 const MCSectionData &SecA = *AD.getFragment()->getParent();
529 const MCSectionData &SecB = *BD.getFragment()->getParent();
530
531 if ((&SecA != &SecB) && !Addrs)
532 return;
533
534 // Eagerly evaluate.
535 Addend += (Layout->getSymbolOffset(&Asm->getSymbolData(A->getSymbol())) -
536 Layout->getSymbolOffset(&Asm->getSymbolData(B->getSymbol())));
537 if (Addrs && (&SecA != &SecB))
538 Addend += (Addrs->lookup(&SecA) - Addrs->lookup(&SecB));
539
Jim Grosbach213039a2012-02-24 05:12:18 +0000[diff] [blame]540 // Pointers to Thumb symbols need to have their low-bit set to allow
541 // for interworking.
542 if (Asm->isThumbFunc(&SA))
543 Addend |= 1;
544
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]545 // Clear the symbol expr pointers to indicate we have folded these
546 // operands.
547 A = B = 0;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]548}
549
Daniel Dunbar395a0992010-12-16 18:36:25 +0000[diff] [blame]550/// \brief Evaluate the result of an add between (conceptually) two MCValues.
551///
552/// This routine conceptually attempts to construct an MCValue:
553/// Result = (Result_A - Result_B + Result_Cst)
554/// from two MCValue's LHS and RHS where
555/// Result = LHS + RHS
556/// and
557/// Result = (LHS_A - LHS_B + LHS_Cst) + (RHS_A - RHS_B + RHS_Cst).
558///
559/// This routine attempts to aggresively fold the operands such that the result
560/// is representable in an MCValue, but may not always succeed.
561///
562/// \returns True on success, false if the result is not representable in an
563/// MCValue.
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]564
565/// NOTE: It is really important to have both the Asm and Layout arguments.
566/// They might look redundant, but this function can be used before layout
567/// is done (see the object streamer for example) and having the Asm argument
Rafael Espindola1ea7f182010-12-18 04:01:45 +0000[diff] [blame]568/// lets us avoid relaxations early.
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]569static bool EvaluateSymbolicAdd(const MCAssembler *Asm,
570 const MCAsmLayout *Layout,
Rafael Espindola93e3cf02010-12-07 00:27:36 +0000[diff] [blame]571 const SectionAddrMap *Addrs,
Rafael Espindola57ab7082010-12-03 00:55:40 +0000[diff] [blame]572 bool InSet,
Rafael Espindola4262a222010-10-16 18:23:53 +0000[diff] [blame]573 const MCValue &LHS,const MCSymbolRefExpr *RHS_A,
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]574 const MCSymbolRefExpr *RHS_B, int64_t RHS_Cst,
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]575 MCValue &Res) {
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]576 // FIXME: This routine (and other evaluation parts) are *incredibly* sloppy
577 // about dealing with modifiers. This will ultimately bite us, one day.
578 const MCSymbolRefExpr *LHS_A = LHS.getSymA();
579 const MCSymbolRefExpr *LHS_B = LHS.getSymB();
580 int64_t LHS_Cst = LHS.getConstant();
581
582 // Fold the result constant immediately.
583 int64_t Result_Cst = LHS_Cst + RHS_Cst;
584
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]585 assert((!Layout || Asm) &&
586 "Must have an assembler object if layout is given!");
587
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]588 // If we have a layout, we can fold resolved differences.
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]589 if (Asm) {
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]590 // First, fold out any differences which are fully resolved. By
591 // reassociating terms in
592 // Result = (LHS_A - LHS_B + LHS_Cst) + (RHS_A - RHS_B + RHS_Cst).
593 // we have the four possible differences:
594 // (LHS_A - LHS_B),
595 // (LHS_A - RHS_B),
596 // (RHS_A - LHS_B),
597 // (RHS_A - RHS_B).
Chris Lattner0ab5e2c2011-04-15 05:18:47 +0000[diff] [blame]598 // Since we are attempting to be as aggressive as possible about folding, we
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]599 // attempt to evaluate each possible alternative.
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]600 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, LHS_A, LHS_B,
601 Result_Cst);
602 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, LHS_A, RHS_B,
603 Result_Cst);
604 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, RHS_A, LHS_B,
605 Result_Cst);
606 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, RHS_A, RHS_B,
607 Result_Cst);
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]608 }
609
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]610 // We can't represent the addition or subtraction of two symbols.
611 if ((LHS_A && RHS_A) || (LHS_B && RHS_B))
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]612 return false;
613
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]614 // At this point, we have at most one additive symbol and one subtractive
615 // symbol -- find them.
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]616 const MCSymbolRefExpr *A = LHS_A ? LHS_A : RHS_A;
617 const MCSymbolRefExpr *B = LHS_B ? LHS_B : RHS_B;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]618
619 // If we have a negated symbol, then we must have also have a non-negated
620 // symbol in order to encode the expression.
621 if (B && !A)
622 return false;
Rafael Espindola4262a222010-10-16 18:23:53 +0000[diff] [blame]623
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]624 Res = MCValue::get(A, B, Result_Cst);
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]625 return true;
626}
627
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]628bool MCExpr::EvaluateAsRelocatable(MCValue &Res,
Rafael Espindola3d5d4642014-03-12 16:55:59 +0000[diff] [blame]629 const MCAsmLayout *Layout) const {
630 MCAssembler *Assembler = Layout ? &Layout->getAssembler() : 0;
631 return EvaluateAsRelocatableImpl(Res, Assembler, Layout, 0, false);
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]632}
633
Rafael Espindola4262a222010-10-16 18:23:53 +0000[diff] [blame]634bool MCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]635 const MCAssembler *Asm,
Rafael Espindola4262a222010-10-16 18:23:53 +0000[diff] [blame]636 const MCAsmLayout *Layout,
Rafael Espindola93e3cf02010-12-07 00:27:36 +0000[diff] [blame]637 const SectionAddrMap *Addrs,
Rafael Espindola4262a222010-10-16 18:23:53 +0000[diff] [blame]638 bool InSet) const {
Daniel Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]639 ++stats::MCExprEvaluate;
640
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]641 switch (getKind()) {
Chris Lattner38d022e2010-02-08 19:41:07 +0000[diff] [blame]642 case Target:
Daniel Dunbarac8a9542010-03-11 02:28:59 +0000[diff] [blame]643 return cast<MCTargetExpr>(this)->EvaluateAsRelocatableImpl(Res, Layout);
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]644
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]645 case Constant:
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]646 Res = MCValue::get(cast<MCConstantExpr>(this)->getValue());
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]647 return true;
648
649 case SymbolRef: {
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]650 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
651 const MCSymbol &Sym = SRE->getSymbol();
Rafael Espindola7fadc0e2014-03-20 02:12:01 +0000[diff] [blame]652 const MCAsmInfo &MCAsmInfo = SRE->getMCAsmInfo();
Daniel Dunbar17b90272009-10-16 01:33:57 +0000[diff] [blame]653
654 // Evaluate recursively if this is a variable.
Rafael Espindola7fadc0e2014-03-20 02:12:01 +0000[diff] [blame]655 if (Sym.isVariable()) {
656 if (Sym.getVariableValue()->EvaluateAsRelocatableImpl(Res, Asm, Layout,
657 Addrs, true)) {
658 const MCSymbolRefExpr *A = Res.getSymA();
659 const MCSymbolRefExpr *B = Res.getSymB();
660
661 if (MCAsmInfo.hasSubsectionsViaSymbols()) {
662 // FIXME: This is small hack. Given
663 // a = b + 4
664 // .long a
665 // the OS X assembler will completely drop the 4. We should probably
666 // include it in the relocation or produce an error if that is not
667 // possible.
668 if (!A && !B)
669 return true;
670 } else {
671 bool IsSymbol = A && A->getSymbol().isDefined();
672 bool IsWeakRef = SRE->getKind() == MCSymbolRefExpr::VK_WEAKREF;
673 if (!IsSymbol && !IsWeakRef)
674 return true;
675 }
676 }
Rafael Espindola8c3039b2010-11-15 16:33:49 +0000[diff] [blame]677 }
Daniel Dunbar17b90272009-10-16 01:33:57 +0000[diff] [blame]678
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]679 Res = MCValue::get(SRE, 0, 0);
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]680 return true;
681 }
682
683 case Unary: {
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]684 const MCUnaryExpr *AUE = cast<MCUnaryExpr>(this);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]685 MCValue Value;
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]686
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]687 if (!AUE->getSubExpr()->EvaluateAsRelocatableImpl(Value, Asm, Layout,
Rafael Espindola93e3cf02010-12-07 00:27:36 +0000[diff] [blame]688 Addrs, InSet))
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]689 return false;
690
691 switch (AUE->getOpcode()) {
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]692 case MCUnaryExpr::LNot:
Daniel Dunbar0d5fc9a2009-07-01 06:48:00 +0000[diff] [blame]693 if (!Value.isAbsolute())
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]694 return false;
695 Res = MCValue::get(!Value.getConstant());
696 break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]697 case MCUnaryExpr::Minus:
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]698 /// -(a - b + const) ==> (b - a - const)
Daniel Dunbar7f8a9eb2009-08-11 17:47:52 +0000[diff] [blame]699 if (Value.getSymA() && !Value.getSymB())
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]700 return false;
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]701 Res = MCValue::get(Value.getSymB(), Value.getSymA(),
702 -Value.getConstant());
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]703 break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]704 case MCUnaryExpr::Not:
Daniel Dunbar0d5fc9a2009-07-01 06:48:00 +0000[diff] [blame]705 if (!Value.isAbsolute())
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]706 return false;
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]707 Res = MCValue::get(~Value.getConstant());
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]708 break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]709 case MCUnaryExpr::Plus:
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]710 Res = Value;
711 break;
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]712 }
713
714 return true;
715 }
716
717 case Binary: {
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]718 const MCBinaryExpr *ABE = cast<MCBinaryExpr>(this);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]719 MCValue LHSValue, RHSValue;
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]720
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]721 if (!ABE->getLHS()->EvaluateAsRelocatableImpl(LHSValue, Asm, Layout,
Rafael Espindola93e3cf02010-12-07 00:27:36 +0000[diff] [blame]722 Addrs, InSet) ||
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]723 !ABE->getRHS()->EvaluateAsRelocatableImpl(RHSValue, Asm, Layout,
Rafael Espindola93e3cf02010-12-07 00:27:36 +0000[diff] [blame]724 Addrs, InSet))
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]725 return false;
726
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]727 // We only support a few operations on non-constant expressions, handle
728 // those first.
Daniel Dunbar0d5fc9a2009-07-01 06:48:00 +0000[diff] [blame]729 if (!LHSValue.isAbsolute() || !RHSValue.isAbsolute()) {
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]730 switch (ABE->getOpcode()) {
731 default:
732 return false;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]733 case MCBinaryExpr::Sub:
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]734 // Negate RHS and add.
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]735 return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]736 RHSValue.getSymB(), RHSValue.getSymA(),
737 -RHSValue.getConstant(),
738 Res);
739
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]740 case MCBinaryExpr::Add:
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]741 return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]742 RHSValue.getSymA(), RHSValue.getSymB(),
743 RHSValue.getConstant(),
744 Res);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]745 }
746 }
747
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]748 // FIXME: We need target hooks for the evaluation. It may be limited in
Dan Gohman9a9d9ea2010-02-08 23:58:47 +0000[diff] [blame]749 // width, and gas defines the result of comparisons and right shifts
750 // differently from Apple as.
Daniel Dunbar39712732009-06-30 16:02:47 +0000[diff] [blame]751 int64_t LHS = LHSValue.getConstant(), RHS = RHSValue.getConstant();
752 int64_t Result = 0;
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]753 switch (ABE->getOpcode()) {
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]754 case MCBinaryExpr::Add: Result = LHS + RHS; break;
755 case MCBinaryExpr::And: Result = LHS & RHS; break;
756 case MCBinaryExpr::Div: Result = LHS / RHS; break;
757 case MCBinaryExpr::EQ: Result = LHS == RHS; break;
758 case MCBinaryExpr::GT: Result = LHS > RHS; break;
759 case MCBinaryExpr::GTE: Result = LHS >= RHS; break;
760 case MCBinaryExpr::LAnd: Result = LHS && RHS; break;
761 case MCBinaryExpr::LOr: Result = LHS || RHS; break;
762 case MCBinaryExpr::LT: Result = LHS < RHS; break;
763 case MCBinaryExpr::LTE: Result = LHS <= RHS; break;
764 case MCBinaryExpr::Mod: Result = LHS % RHS; break;
765 case MCBinaryExpr::Mul: Result = LHS * RHS; break;
766 case MCBinaryExpr::NE: Result = LHS != RHS; break;
767 case MCBinaryExpr::Or: Result = LHS | RHS; break;
768 case MCBinaryExpr::Shl: Result = LHS << RHS; break;
769 case MCBinaryExpr::Shr: Result = LHS >> RHS; break;
770 case MCBinaryExpr::Sub: Result = LHS - RHS; break;
771 case MCBinaryExpr::Xor: Result = LHS ^ RHS; break;
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]772 }
773
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]774 Res = MCValue::get(Result);
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]775 return true;
776 }
777 }
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]778
Craig Toppera2886c22012-02-07 05:05:23 +0000[diff] [blame]779 llvm_unreachable("Invalid assembly expression kind!");
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]780}
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]781
782const MCSection *MCExpr::FindAssociatedSection() const {
783 switch (getKind()) {
784 case Target:
785 // We never look through target specific expressions.
786 return cast<MCTargetExpr>(this)->FindAssociatedSection();
787
788 case Constant:
789 return MCSymbol::AbsolutePseudoSection;
790
791 case SymbolRef: {
792 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
793 const MCSymbol &Sym = SRE->getSymbol();
794
795 if (Sym.isDefined())
796 return &Sym.getSection();
797
798 return 0;
799 }
800
801 case Unary:
802 return cast<MCUnaryExpr>(this)->getSubExpr()->FindAssociatedSection();
803
804 case Binary: {
805 const MCBinaryExpr *BE = cast<MCBinaryExpr>(this);
806 const MCSection *LHS_S = BE->getLHS()->FindAssociatedSection();
807 const MCSection *RHS_S = BE->getRHS()->FindAssociatedSection();
808
809 // If either section is absolute, return the other.
810 if (LHS_S == MCSymbol::AbsolutePseudoSection)
811 return RHS_S;
812 if (RHS_S == MCSymbol::AbsolutePseudoSection)
813 return LHS_S;
814
815 // Otherwise, return the first non-null section.
816 return LHS_S ? LHS_S : RHS_S;
817 }
818 }
819
Craig Toppera2886c22012-02-07 05:05:23 +0000[diff] [blame]820 llvm_unreachable("Invalid assembly expression kind!");
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]821}