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gerrit-public.fairphone.software / toolchain / llvm-project / c242be40a140df8959ce08bc6d593d9ee14ca319 / . / llvm / lib / MC / MCExpr.cpp
blob: fe14272a189b63ef0f0a73c30ff14712ef9220e4 [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//
Chandler Carruth2946cd72019-01-19 08:50:56 +0000[diff] [blame]3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]6//
7//===----------------------------------------------------------------------===//
8
Chandler Carruth6bda14b2017-06-06 11:49:48 +0000[diff] [blame]9#include "llvm/MC/MCExpr.h"
Daniel Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]10#include "llvm/ADT/Statistic.h"
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]11#include "llvm/ADT/StringSwitch.h"
Nico Weber432a3882018-04-30 14:59:11 +0000[diff] [blame]12#include "llvm/Config/llvm-config.h"
Alex Bradbury257d5b52018-05-23 12:36:18 +0000[diff] [blame]13#include "llvm/MC/MCAsmBackend.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"
Eugene Zelenko1d435522017-02-07 23:02:00 +0000[diff] [blame]21#include "llvm/Support/Casting.h"
22#include "llvm/Support/Compiler.h"
David Greenea8cbfb82010-01-05 01:28:07 +0000[diff] [blame]23#include "llvm/Support/Debug.h"
Chandler Carruthf3e85022012-01-10 18:08:01 +0000[diff] [blame]24#include "llvm/Support/ErrorHandling.h"
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]25#include "llvm/Support/raw_ostream.h"
Eugene Zelenko1d435522017-02-07 23:02:00 +0000[diff] [blame]26#include <cassert>
27#include <cstdint>
28
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]29using namespace llvm;
30
Chandler Carruthf58e3762014-04-22 03:04:17 +0000[diff] [blame]31#define DEBUG_TYPE "mcexpr"
32
Daniel Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]33namespace {
34namespace stats {
Eugene Zelenko1d435522017-02-07 23:02:00 +0000[diff] [blame]35
Daniel Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]36STATISTIC(MCExprEvaluate, "Number of MCExpr evaluations");
Eugene Zelenko1d435522017-02-07 23:02:00 +0000[diff] [blame]37
38} // end namespace stats
39} // end anonymous namespace
Daniel Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]40
Daniel Sandersfe98b2f2016-05-03 13:35:44 +0000[diff] [blame]41void MCExpr::print(raw_ostream &OS, const MCAsmInfo *MAI, bool InParens) const {
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]42 switch (getKind()) {
Chris Lattner38d022e2010-02-08 19:41:07 +0000[diff] [blame]43 case MCExpr::Target:
Matt Arsenault8b643552015-06-09 00:31:39 +0000[diff] [blame]44 return cast<MCTargetExpr>(this)->printImpl(OS, MAI);
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]45 case MCExpr::Constant:
46 OS << cast<MCConstantExpr>(*this).getValue();
47 return;
48
Chris Lattner22833a32009-09-08 23:20:50 +0000[diff] [blame]49 case MCExpr::SymbolRef: {
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]50 const MCSymbolRefExpr &SRE = cast<MCSymbolRefExpr>(*this);
51 const MCSymbol &Sym = SRE.getSymbol();
Chris Lattneredb9d842010-11-15 02:46:57 +0000[diff] [blame]52 // Parenthesize names that start with $ so that they don't look like
53 // absolute names.
Daniel Sandersfe98b2f2016-05-03 13:35:44 +0000[diff] [blame]54 bool UseParens =
Eugene Zelenko1d435522017-02-07 23:02:00 +0000[diff] [blame]55 !InParens && !Sym.getName().empty() && Sym.getName()[0] == '$';
Matt Arsenault8b643552015-06-09 00:31:39 +0000[diff] [blame]56 if (UseParens) {
57 OS << '(';
58 Sym.print(OS, MAI);
59 OS << ')';
60 } else
61 Sym.print(OS, MAI);
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]62
Benjamin Kramerdd136432014-10-11 17:57:27 +0000[diff] [blame]63 if (SRE.getKind() != MCSymbolRefExpr::VK_None)
64 SRE.printVariantKind(OS);
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]65
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]66 return;
Chris Lattner22833a32009-09-08 23:20:50 +0000[diff] [blame]67 }
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]68
69 case MCExpr::Unary: {
70 const MCUnaryExpr &UE = cast<MCUnaryExpr>(*this);
71 switch (UE.getOpcode()) {
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]72 case MCUnaryExpr::LNot: OS << '!'; break;
73 case MCUnaryExpr::Minus: OS << '-'; break;
74 case MCUnaryExpr::Not: OS << '~'; break;
75 case MCUnaryExpr::Plus: OS << '+'; break;
76 }
Bill Wendling2a302212018-05-14 05:25:36 +0000[diff] [blame]77 bool Binary = UE.getSubExpr()->getKind() == MCExpr::Binary;
78 if (Binary) OS << "(";
Matt Arsenault8b643552015-06-09 00:31:39 +0000[diff] [blame]79 UE.getSubExpr()->print(OS, MAI);
Bill Wendling2a302212018-05-14 05:25:36 +0000[diff] [blame]80 if (Binary) OS << ")";
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]81 return;
82 }
83
84 case MCExpr::Binary: {
85 const MCBinaryExpr &BE = cast<MCBinaryExpr>(*this);
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]86
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]87 // Only print parens around the LHS if it is non-trivial.
88 if (isa<MCConstantExpr>(BE.getLHS()) || isa<MCSymbolRefExpr>(BE.getLHS())) {
Matt Arsenault8b643552015-06-09 00:31:39 +0000[diff] [blame]89 BE.getLHS()->print(OS, MAI);
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]90 } else {
Matt Arsenault8b643552015-06-09 00:31:39 +0000[diff] [blame]91 OS << '(';
92 BE.getLHS()->print(OS, MAI);
93 OS << ')';
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]94 }
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]95
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]96 switch (BE.getOpcode()) {
Chris Lattner7975b8f2009-09-08 06:37:35 +0000[diff] [blame]97 case MCBinaryExpr::Add:
98 // Print "X-42" instead of "X+-42".
99 if (const MCConstantExpr *RHSC = dyn_cast<MCConstantExpr>(BE.getRHS())) {
100 if (RHSC->getValue() < 0) {
101 OS << RHSC->getValue();
102 return;
103 }
104 }
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]105
Chris Lattner7975b8f2009-09-08 06:37:35 +0000[diff] [blame]106 OS << '+';
107 break;
Ahmed Bougacha177c1482015-04-28 00:21:32 +0000[diff] [blame]108 case MCBinaryExpr::AShr: OS << ">>"; break;
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]109 case MCBinaryExpr::And: OS << '&'; break;
110 case MCBinaryExpr::Div: OS << '/'; break;
111 case MCBinaryExpr::EQ: OS << "=="; break;
112 case MCBinaryExpr::GT: OS << '>'; break;
113 case MCBinaryExpr::GTE: OS << ">="; break;
114 case MCBinaryExpr::LAnd: OS << "&&"; break;
115 case MCBinaryExpr::LOr: OS << "||"; break;
Ahmed Bougacha177c1482015-04-28 00:21:32 +0000[diff] [blame]116 case MCBinaryExpr::LShr: OS << ">>"; break;
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]117 case MCBinaryExpr::LT: OS << '<'; break;
118 case MCBinaryExpr::LTE: OS << "<="; break;
119 case MCBinaryExpr::Mod: OS << '%'; break;
120 case MCBinaryExpr::Mul: OS << '*'; break;
121 case MCBinaryExpr::NE: OS << "!="; break;
122 case MCBinaryExpr::Or: OS << '|'; break;
123 case MCBinaryExpr::Shl: OS << "<<"; break;
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]124 case MCBinaryExpr::Sub: OS << '-'; break;
125 case MCBinaryExpr::Xor: OS << '^'; break;
126 }
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]127
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]128 // Only print parens around the LHS if it is non-trivial.
129 if (isa<MCConstantExpr>(BE.getRHS()) || isa<MCSymbolRefExpr>(BE.getRHS())) {
Matt Arsenault8b643552015-06-09 00:31:39 +0000[diff] [blame]130 BE.getRHS()->print(OS, MAI);
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]131 } else {
Matt Arsenault8b643552015-06-09 00:31:39 +0000[diff] [blame]132 OS << '(';
133 BE.getRHS()->print(OS, MAI);
134 OS << ')';
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]135 }
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]136 return;
137 }
138 }
139
Craig Toppera2886c22012-02-07 05:05:23 +0000[diff] [blame]140 llvm_unreachable("Invalid expression kind!");
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]141}
142
Aaron Ballman615eb472017-10-15 14:32:27 +0000[diff] [blame]143#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
Yaron Kereneb2a2542016-01-29 20:50:44 +0000[diff] [blame]144LLVM_DUMP_METHOD void MCExpr::dump() const {
Rafael Espindolaf4a13652015-05-27 13:05:42 +0000[diff] [blame]145 dbgs() << *this;
David Greenea8cbfb82010-01-05 01:28:07 +0000[diff] [blame]146 dbgs() << '\n';
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]147}
Matthias Braun8c209aa2017-01-28 02:02:38 +0000[diff] [blame]148#endif
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]149
150/* *** */
151
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]152const MCBinaryExpr *MCBinaryExpr::create(Opcode Opc, const MCExpr *LHS,
Chad Rosier9245e122017-01-19 20:06:32 +0000[diff] [blame]153 const MCExpr *RHS, MCContext &Ctx,
154 SMLoc Loc) {
155 return new (Ctx) MCBinaryExpr(Opc, LHS, RHS, Loc);
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]156}
157
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]158const MCUnaryExpr *MCUnaryExpr::create(Opcode Opc, const MCExpr *Expr,
Sanne Wouda9dfa6ad2017-03-10 13:08:20 +0000[diff] [blame]159 MCContext &Ctx, SMLoc Loc) {
160 return new (Ctx) MCUnaryExpr(Opc, Expr, Loc);
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]161}
162
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]163const MCConstantExpr *MCConstantExpr::create(int64_t Value, MCContext &Ctx) {
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]164 return new (Ctx) MCConstantExpr(Value);
165}
166
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]167/* *** */
168
Benjamin Kramerdd136432014-10-11 17:57:27 +0000[diff] [blame]169MCSymbolRefExpr::MCSymbolRefExpr(const MCSymbol *Symbol, VariantKind Kind,
Chad Rosier9245e122017-01-19 20:06:32 +0000[diff] [blame]170 const MCAsmInfo *MAI, SMLoc Loc)
171 : MCExpr(MCExpr::SymbolRef, Loc), Kind(Kind),
Benjamin Kramerdd136432014-10-11 17:57:27 +0000[diff] [blame]172 UseParensForSymbolVariant(MAI->useParensForSymbolVariant()),
173 HasSubsectionsViaSymbols(MAI->hasSubsectionsViaSymbols()),
174 Symbol(Symbol) {
175 assert(Symbol);
176}
177
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]178const MCSymbolRefExpr *MCSymbolRefExpr::create(const MCSymbol *Sym,
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]179 VariantKind Kind,
Chad Rosier9245e122017-01-19 20:06:32 +0000[diff] [blame]180 MCContext &Ctx, SMLoc Loc) {
181 return new (Ctx) MCSymbolRefExpr(Sym, Kind, Ctx.getAsmInfo(), Loc);
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]182}
183
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]184const MCSymbolRefExpr *MCSymbolRefExpr::create(StringRef Name, VariantKind Kind,
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]185 MCContext &Ctx) {
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]186 return create(Ctx.getOrCreateSymbol(Name), Kind, Ctx);
Chris Lattner6a833f62009-09-16 01:26:31 +0000[diff] [blame]187}
188
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]189StringRef MCSymbolRefExpr::getVariantKindName(VariantKind Kind) {
190 switch (Kind) {
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]191 case VK_Invalid: return "<<invalid>>";
192 case VK_None: return "<<none>>";
193
Colin LeMahieu0e051922016-02-10 18:32:01 +0000[diff] [blame]194 case VK_DTPOFF: return "DTPOFF";
195 case VK_DTPREL: return "DTPREL";
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]196 case VK_GOT: return "GOT";
197 case VK_GOTOFF: return "GOTOFF";
Colin LeMahieuea211422016-02-09 19:17:34 +0000[diff] [blame]198 case VK_GOTREL: return "GOTREL";
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]199 case VK_GOTPCREL: return "GOTPCREL";
200 case VK_GOTTPOFF: return "GOTTPOFF";
201 case VK_INDNTPOFF: return "INDNTPOFF";
202 case VK_NTPOFF: return "NTPOFF";
Rafael Espindolab3b49bb2010-10-28 14:22:44 +0000[diff] [blame]203 case VK_GOTNTPOFF: return "GOTNTPOFF";
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]204 case VK_PLT: return "PLT";
205 case VK_TLSGD: return "TLSGD";
Rafael Espindola2dbec3f2010-10-28 15:02:40 +0000[diff] [blame]206 case VK_TLSLD: return "TLSLD";
Rafael Espindola6f23eb32010-10-28 14:37:09 +0000[diff] [blame]207 case VK_TLSLDM: return "TLSLDM";
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]208 case VK_TPOFF: return "TPOFF";
Colin LeMahieu0e051922016-02-10 18:32:01 +0000[diff] [blame]209 case VK_TPREL: return "TPREL";
Davide Italiano249c45d2016-03-15 00:25:22 +0000[diff] [blame]210 case VK_TLSCALL: return "tlscall";
Davide Italianodfdf2782016-03-15 17:29:52 +0000[diff] [blame]211 case VK_TLSDESC: return "tlsdesc";
Chris Lattner94f0c142010-11-14 22:22:59 +0000[diff] [blame]212 case VK_TLVP: return "TLVP";
Tim Northover00ed9962014-03-29 10:18:08 +0000[diff] [blame]213 case VK_TLVPPAGE: return "TLVPPAGE";
214 case VK_TLVPPAGEOFF: return "TLVPPAGEOFF";
215 case VK_PAGE: return "PAGE";
216 case VK_PAGEOFF: return "PAGEOFF";
217 case VK_GOTPAGE: return "GOTPAGE";
218 case VK_GOTPAGEOFF: return "GOTPAGEOFF";
Benjamin Kramer9c9e0a22013-03-30 16:21:50 +0000[diff] [blame]219 case VK_SECREL: return "SECREL32";
Davide Italianofcae9342015-03-04 06:49:39 +0000[diff] [blame]220 case VK_SIZE: return "SIZE";
Rafael Espindola7fadc0e2014-03-20 02:12:01 +0000[diff] [blame]221 case VK_WEAKREF: return "WEAKREF";
Peter Collingbourned763c4c2017-01-31 18:28:44 +0000[diff] [blame]222 case VK_X86_ABS8: return "ABS8";
David Peixotto8ad70b32013-12-04 22:43:20 +0000[diff] [blame]223 case VK_ARM_NONE: return "none";
Peter Collingbourne97aae402015-10-26 18:23:16 +0000[diff] [blame]224 case VK_ARM_GOT_PREL: return "GOT_PREL";
David Peixotto8ad70b32013-12-04 22:43:20 +0000[diff] [blame]225 case VK_ARM_TARGET1: return "target1";
226 case VK_ARM_TARGET2: return "target2";
227 case VK_ARM_PREL31: return "prel31";
Saleem Abdulrasoolfe781972015-01-11 04:39:18 +0000[diff] [blame]228 case VK_ARM_SBREL: return "sbrel";
Kai Nackee51c8132014-01-20 11:00:40 +0000[diff] [blame]229 case VK_ARM_TLSLDO: return "tlsldo";
Saleem Abdulrasool56e06e82014-01-30 04:02:47 +0000[diff] [blame]230 case VK_ARM_TLSDESCSEQ: return "tlsdescseq";
Dylan McKayba233432017-12-09 08:01:28 +0000[diff] [blame]231 case VK_AVR_NONE: return "none";
232 case VK_AVR_LO8: return "lo8";
233 case VK_AVR_HI8: return "hi8";
234 case VK_AVR_HLO8: return "hlo8";
235 case VK_AVR_DIFF8: return "diff8";
236 case VK_AVR_DIFF16: return "diff16";
237 case VK_AVR_DIFF32: return "diff32";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]238 case VK_PPC_LO: return "l";
Ulrich Weigande67c5652013-06-21 14:42:49 +0000[diff] [blame]239 case VK_PPC_HI: return "h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]240 case VK_PPC_HA: return "ha";
Sean Fertile80b8f822018-06-15 19:47:11 +0000[diff] [blame]241 case VK_PPC_HIGH: return "high";
242 case VK_PPC_HIGHA: return "higha";
Ulrich Weigande9126f52013-06-21 14:43:42 +0000[diff] [blame]243 case VK_PPC_HIGHER: return "higher";
244 case VK_PPC_HIGHERA: return "highera";
245 case VK_PPC_HIGHEST: return "highest";
246 case VK_PPC_HIGHESTA: return "highesta";
Ulrich Weigand93372b42013-06-25 16:49:50 +0000[diff] [blame]247 case VK_PPC_GOT_LO: return "got@l";
248 case VK_PPC_GOT_HI: return "got@h";
249 case VK_PPC_GOT_HA: return "got@ha";
Ulrich Weigand68e2e1b2013-06-20 22:39:42 +0000[diff] [blame]250 case VK_PPC_TOCBASE: return "tocbase";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]251 case VK_PPC_TOC: return "toc";
252 case VK_PPC_TOC_LO: return "toc@l";
Ulrich Weigand72ddbd62013-06-21 14:43:10 +0000[diff] [blame]253 case VK_PPC_TOC_HI: return "toc@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]254 case VK_PPC_TOC_HA: return "toc@ha";
Ulrich Weigandf11efe72013-07-01 23:33:29 +0000[diff] [blame]255 case VK_PPC_DTPMOD: return "dtpmod";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]256 case VK_PPC_TPREL_LO: return "tprel@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]257 case VK_PPC_TPREL_HI: return "tprel@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]258 case VK_PPC_TPREL_HA: return "tprel@ha";
Sean Fertilecac28ae2018-06-15 19:47:16 +0000[diff] [blame]259 case VK_PPC_TPREL_HIGH: return "tprel@high";
260 case VK_PPC_TPREL_HIGHA: return "tprel@higha";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]261 case VK_PPC_TPREL_HIGHER: return "tprel@higher";
262 case VK_PPC_TPREL_HIGHERA: return "tprel@highera";
263 case VK_PPC_TPREL_HIGHEST: return "tprel@highest";
264 case VK_PPC_TPREL_HIGHESTA: return "tprel@highesta";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]265 case VK_PPC_DTPREL_LO: return "dtprel@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]266 case VK_PPC_DTPREL_HI: return "dtprel@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]267 case VK_PPC_DTPREL_HA: return "dtprel@ha";
Sean Fertilecac28ae2018-06-15 19:47:16 +0000[diff] [blame]268 case VK_PPC_DTPREL_HIGH: return "dtprel@high";
269 case VK_PPC_DTPREL_HIGHA: return "dtprel@higha";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]270 case VK_PPC_DTPREL_HIGHER: return "dtprel@higher";
271 case VK_PPC_DTPREL_HIGHERA: return "dtprel@highera";
272 case VK_PPC_DTPREL_HIGHEST: return "dtprel@highest";
273 case VK_PPC_DTPREL_HIGHESTA: return "dtprel@highesta";
274 case VK_PPC_GOT_TPREL: return "got@tprel";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]275 case VK_PPC_GOT_TPREL_LO: return "got@tprel@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]276 case VK_PPC_GOT_TPREL_HI: return "got@tprel@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]277 case VK_PPC_GOT_TPREL_HA: return "got@tprel@ha";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]278 case VK_PPC_GOT_DTPREL: return "got@dtprel";
279 case VK_PPC_GOT_DTPREL_LO: return "got@dtprel@l";
280 case VK_PPC_GOT_DTPREL_HI: return "got@dtprel@h";
281 case VK_PPC_GOT_DTPREL_HA: return "got@dtprel@ha";
Bill Schmidtca4a0c92012-12-04 16:18:08 +0000[diff] [blame]282 case VK_PPC_TLS: return "tls";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]283 case VK_PPC_GOT_TLSGD: return "got@tlsgd";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]284 case VK_PPC_GOT_TLSGD_LO: return "got@tlsgd@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]285 case VK_PPC_GOT_TLSGD_HI: return "got@tlsgd@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]286 case VK_PPC_GOT_TLSGD_HA: return "got@tlsgd@ha";
Ulrich Weigand52cf8e42013-07-09 16:41:09 +0000[diff] [blame]287 case VK_PPC_TLSGD: return "tlsgd";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]288 case VK_PPC_GOT_TLSLD: return "got@tlsld";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]289 case VK_PPC_GOT_TLSLD_LO: return "got@tlsld@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]290 case VK_PPC_GOT_TLSLD_HI: return "got@tlsld@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]291 case VK_PPC_GOT_TLSLD_HA: return "got@tlsld@ha";
Ulrich Weigand52cf8e42013-07-09 16:41:09 +0000[diff] [blame]292 case VK_PPC_TLSLD: return "tlsld";
Justin Hibbitsa88b6052014-11-12 15:16:30 +0000[diff] [blame]293 case VK_PPC_LOCAL: return "local";
Reid Kleckner81782f02014-09-25 02:09:18 +0000[diff] [blame]294 case VK_COFF_IMGREL32: return "IMGREL";
Colin LeMahieub6625652015-05-01 21:14:21 +0000[diff] [blame]295 case VK_Hexagon_PCREL: return "PCREL";
296 case VK_Hexagon_LO16: return "LO16";
297 case VK_Hexagon_HI16: return "HI16";
298 case VK_Hexagon_GPREL: return "GPREL";
299 case VK_Hexagon_GD_GOT: return "GDGOT";
300 case VK_Hexagon_LD_GOT: return "LDGOT";
301 case VK_Hexagon_GD_PLT: return "GDPLT";
302 case VK_Hexagon_LD_PLT: return "LDPLT";
303 case VK_Hexagon_IE: return "IE";
304 case VK_Hexagon_IE_GOT: return "IEGOT";
Sam Clegg2a7cac92019-04-04 17:43:50 +0000[diff] [blame]305 case VK_WASM_TYPEINDEX: return "TYPEINDEX";
306 case VK_WASM_MBREL: return "MBREL";
307 case VK_WASM_TBREL: return "TBREL";
Konstantin Zhuravlyov2a2ac372016-10-14 04:21:32 +0000[diff] [blame]308 case VK_AMDGPU_GOTPCREL32_LO: return "gotpcrel32@lo";
309 case VK_AMDGPU_GOTPCREL32_HI: return "gotpcrel32@hi";
310 case VK_AMDGPU_REL32_LO: return "rel32@lo";
311 case VK_AMDGPU_REL32_HI: return "rel32@hi";
Konstantin Zhuravlyov3e5d66a2018-06-11 21:37:57 +0000[diff] [blame]312 case VK_AMDGPU_REL64: return "rel64";
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]313 }
Chandler Carruthf3e85022012-01-10 18:08:01 +0000[diff] [blame]314 llvm_unreachable("Invalid variant kind");
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]315}
316
317MCSymbolRefExpr::VariantKind
318MCSymbolRefExpr::getVariantKindForName(StringRef Name) {
Roman Divackya93d0022014-12-18 23:12:34 +0000[diff] [blame]319 return StringSwitch<VariantKind>(Name.lower())
Colin LeMahieu0e051922016-02-10 18:32:01 +0000[diff] [blame]320 .Case("dtprel", VK_DTPREL)
321 .Case("dtpoff", VK_DTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]322 .Case("got", VK_GOT)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]323 .Case("gotoff", VK_GOTOFF)
Colin LeMahieuea211422016-02-09 19:17:34 +0000[diff] [blame]324 .Case("gotrel", VK_GOTREL)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]325 .Case("gotpcrel", VK_GOTPCREL)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]326 .Case("gottpoff", VK_GOTTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]327 .Case("indntpoff", VK_INDNTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]328 .Case("ntpoff", VK_NTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]329 .Case("gotntpoff", VK_GOTNTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]330 .Case("plt", VK_PLT)
Davide Italiano249c45d2016-03-15 00:25:22 +0000[diff] [blame]331 .Case("tlscall", VK_TLSCALL)
Davide Italianodfdf2782016-03-15 17:29:52 +0000[diff] [blame]332 .Case("tlsdesc", VK_TLSDESC)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]333 .Case("tlsgd", VK_TLSGD)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]334 .Case("tlsld", VK_TLSLD)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]335 .Case("tlsldm", VK_TLSLDM)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]336 .Case("tpoff", VK_TPOFF)
Colin LeMahieu0e051922016-02-10 18:32:01 +0000[diff] [blame]337 .Case("tprel", VK_TPREL)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]338 .Case("tlvp", VK_TLVP)
Tim Northover00ed9962014-03-29 10:18:08 +0000[diff] [blame]339 .Case("tlvppage", VK_TLVPPAGE)
Tim Northover00ed9962014-03-29 10:18:08 +0000[diff] [blame]340 .Case("tlvppageoff", VK_TLVPPAGEOFF)
Tim Northover00ed9962014-03-29 10:18:08 +0000[diff] [blame]341 .Case("page", VK_PAGE)
Tim Northover00ed9962014-03-29 10:18:08 +0000[diff] [blame]342 .Case("pageoff", VK_PAGEOFF)
Tim Northover00ed9962014-03-29 10:18:08 +0000[diff] [blame]343 .Case("gotpage", VK_GOTPAGE)
Tim Northover00ed9962014-03-29 10:18:08 +0000[diff] [blame]344 .Case("gotpageoff", VK_GOTPAGEOFF)
Nico Rieck1da45292013-04-10 23:28:17 +0000[diff] [blame]345 .Case("imgrel", VK_COFF_IMGREL32)
Rafael Espindolab770f892013-04-25 19:27:05 +0000[diff] [blame]346 .Case("secrel32", VK_SECREL)
Davide Italianofcae9342015-03-04 06:49:39 +0000[diff] [blame]347 .Case("size", VK_SIZE)
Peter Collingbourned763c4c2017-01-31 18:28:44 +0000[diff] [blame]348 .Case("abs8", VK_X86_ABS8)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]349 .Case("l", VK_PPC_LO)
Ulrich Weigande67c5652013-06-21 14:42:49 +0000[diff] [blame]350 .Case("h", VK_PPC_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]351 .Case("ha", VK_PPC_HA)
Sean Fertile80b8f822018-06-15 19:47:11 +0000[diff] [blame]352 .Case("high", VK_PPC_HIGH)
353 .Case("higha", VK_PPC_HIGHA)
Ulrich Weigande9126f52013-06-21 14:43:42 +0000[diff] [blame]354 .Case("higher", VK_PPC_HIGHER)
Ulrich Weigande9126f52013-06-21 14:43:42 +0000[diff] [blame]355 .Case("highera", VK_PPC_HIGHERA)
Ulrich Weigande9126f52013-06-21 14:43:42 +0000[diff] [blame]356 .Case("highest", VK_PPC_HIGHEST)
Ulrich Weigande9126f52013-06-21 14:43:42 +0000[diff] [blame]357 .Case("highesta", VK_PPC_HIGHESTA)
Ulrich Weigand93372b42013-06-25 16:49:50 +0000[diff] [blame]358 .Case("got@l", VK_PPC_GOT_LO)
Ulrich Weigand93372b42013-06-25 16:49:50 +0000[diff] [blame]359 .Case("got@h", VK_PPC_GOT_HI)
Ulrich Weigand93372b42013-06-25 16:49:50 +0000[diff] [blame]360 .Case("got@ha", VK_PPC_GOT_HA)
Justin Hibbits0c0d5de2014-12-17 06:23:35 +0000[diff] [blame]361 .Case("local", VK_PPC_LOCAL)
Ulrich Weigand68e2e1b2013-06-20 22:39:42 +0000[diff] [blame]362 .Case("tocbase", VK_PPC_TOCBASE)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]363 .Case("toc", VK_PPC_TOC)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]364 .Case("toc@l", VK_PPC_TOC_LO)
Ulrich Weigand72ddbd62013-06-21 14:43:10 +0000[diff] [blame]365 .Case("toc@h", VK_PPC_TOC_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]366 .Case("toc@ha", VK_PPC_TOC_HA)
Ulrich Weigand2c3a2192013-05-03 19:52:35 +0000[diff] [blame]367 .Case("tls", VK_PPC_TLS)
Ulrich Weigandf11efe72013-07-01 23:33:29 +0000[diff] [blame]368 .Case("dtpmod", VK_PPC_DTPMOD)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]369 .Case("tprel@l", VK_PPC_TPREL_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]370 .Case("tprel@h", VK_PPC_TPREL_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]371 .Case("tprel@ha", VK_PPC_TPREL_HA)
Sean Fertilecac28ae2018-06-15 19:47:16 +0000[diff] [blame]372 .Case("tprel@high", VK_PPC_TPREL_HIGH)
373 .Case("tprel@higha", VK_PPC_TPREL_HIGHA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]374 .Case("tprel@higher", VK_PPC_TPREL_HIGHER)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]375 .Case("tprel@highera", VK_PPC_TPREL_HIGHERA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]376 .Case("tprel@highest", VK_PPC_TPREL_HIGHEST)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]377 .Case("tprel@highesta", VK_PPC_TPREL_HIGHESTA)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]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)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]380 .Case("dtprel@ha", VK_PPC_DTPREL_HA)
Sean Fertilecac28ae2018-06-15 19:47:16 +0000[diff] [blame]381 .Case("dtprel@high", VK_PPC_DTPREL_HIGH)
382 .Case("dtprel@higha", VK_PPC_DTPREL_HIGHA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]383 .Case("dtprel@higher", VK_PPC_DTPREL_HIGHER)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]384 .Case("dtprel@highera", VK_PPC_DTPREL_HIGHERA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]385 .Case("dtprel@highest", VK_PPC_DTPREL_HIGHEST)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]386 .Case("dtprel@highesta", VK_PPC_DTPREL_HIGHESTA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]387 .Case("got@tprel", VK_PPC_GOT_TPREL)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]388 .Case("got@tprel@l", VK_PPC_GOT_TPREL_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]389 .Case("got@tprel@h", VK_PPC_GOT_TPREL_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]390 .Case("got@tprel@ha", VK_PPC_GOT_TPREL_HA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]391 .Case("got@dtprel", VK_PPC_GOT_DTPREL)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]392 .Case("got@dtprel@l", VK_PPC_GOT_DTPREL_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]393 .Case("got@dtprel@h", VK_PPC_GOT_DTPREL_HI)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]394 .Case("got@dtprel@ha", VK_PPC_GOT_DTPREL_HA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]395 .Case("got@tlsgd", VK_PPC_GOT_TLSGD)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]396 .Case("got@tlsgd@l", VK_PPC_GOT_TLSGD_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]397 .Case("got@tlsgd@h", VK_PPC_GOT_TLSGD_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]398 .Case("got@tlsgd@ha", VK_PPC_GOT_TLSGD_HA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]399 .Case("got@tlsld", VK_PPC_GOT_TLSLD)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]400 .Case("got@tlsld@l", VK_PPC_GOT_TLSLD_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]401 .Case("got@tlsld@h", VK_PPC_GOT_TLSLD_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]402 .Case("got@tlsld@ha", VK_PPC_GOT_TLSLD_HA)
Krzysztof Parzyszeka45c0e02015-12-18 18:47:27 +0000[diff] [blame]403 .Case("gdgot", VK_Hexagon_GD_GOT)
404 .Case("gdplt", VK_Hexagon_GD_PLT)
405 .Case("iegot", VK_Hexagon_IE_GOT)
406 .Case("ie", VK_Hexagon_IE)
407 .Case("ldgot", VK_Hexagon_LD_GOT)
408 .Case("ldplt", VK_Hexagon_LD_PLT)
409 .Case("pcrel", VK_Hexagon_PCREL)
David Peixotto8ad70b32013-12-04 22:43:20 +0000[diff] [blame]410 .Case("none", VK_ARM_NONE)
Peter Collingbourne97aae402015-10-26 18:23:16 +0000[diff] [blame]411 .Case("got_prel", VK_ARM_GOT_PREL)
David Peixotto8ad70b32013-12-04 22:43:20 +0000[diff] [blame]412 .Case("target1", VK_ARM_TARGET1)
David Peixotto8ad70b32013-12-04 22:43:20 +0000[diff] [blame]413 .Case("target2", VK_ARM_TARGET2)
David Peixotto8ad70b32013-12-04 22:43:20 +0000[diff] [blame]414 .Case("prel31", VK_ARM_PREL31)
Saleem Abdulrasoolfe781972015-01-11 04:39:18 +0000[diff] [blame]415 .Case("sbrel", VK_ARM_SBREL)
Kai Nackee51c8132014-01-20 11:00:40 +0000[diff] [blame]416 .Case("tlsldo", VK_ARM_TLSLDO)
Dylan McKayba233432017-12-09 08:01:28 +0000[diff] [blame]417 .Case("lo8", VK_AVR_LO8)
418 .Case("hi8", VK_AVR_HI8)
419 .Case("hlo8", VK_AVR_HLO8)
Sam Clegg2a7cac92019-04-04 17:43:50 +0000[diff] [blame]420 .Case("typeindex", VK_WASM_TYPEINDEX)
421 .Case("tbrel", VK_WASM_TBREL)
422 .Case("mbrel", VK_WASM_MBREL)
Konstantin Zhuravlyov2a2ac372016-10-14 04:21:32 +0000[diff] [blame]423 .Case("gotpcrel32@lo", VK_AMDGPU_GOTPCREL32_LO)
424 .Case("gotpcrel32@hi", VK_AMDGPU_GOTPCREL32_HI)
425 .Case("rel32@lo", VK_AMDGPU_REL32_LO)
426 .Case("rel32@hi", VK_AMDGPU_REL32_HI)
Konstantin Zhuravlyov3e5d66a2018-06-11 21:37:57 +0000[diff] [blame]427 .Case("rel64", VK_AMDGPU_REL64)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]428 .Default(VK_Invalid);
429}
430
Benjamin Kramerdd136432014-10-11 17:57:27 +0000[diff] [blame]431void MCSymbolRefExpr::printVariantKind(raw_ostream &OS) const {
432 if (UseParensForSymbolVariant)
433 OS << '(' << MCSymbolRefExpr::getVariantKindName(getKind()) << ')';
434 else
435 OS << '@' << MCSymbolRefExpr::getVariantKindName(getKind());
436}
437
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]438/* *** */
439
Craig Topper2a6a08b2012-09-26 06:36:36 +0000[diff] [blame]440void MCTargetExpr::anchor() {}
Chris Lattner6a833f62009-09-16 01:26:31 +0000[diff] [blame]441
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]442/* *** */
443
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]444bool MCExpr::evaluateAsAbsolute(int64_t &Res) const {
445 return evaluateAsAbsolute(Res, nullptr, nullptr, nullptr);
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]446}
447
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]448bool MCExpr::evaluateAsAbsolute(int64_t &Res,
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]449 const MCAsmLayout &Layout) const {
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]450 return evaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, nullptr);
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]451}
452
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]453bool MCExpr::evaluateAsAbsolute(int64_t &Res,
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]454 const MCAsmLayout &Layout,
455 const SectionAddrMap &Addrs) const {
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]456 return evaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, &Addrs);
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]457}
458
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]459bool MCExpr::evaluateAsAbsolute(int64_t &Res, const MCAssembler &Asm) const {
460 return evaluateAsAbsolute(Res, &Asm, nullptr, nullptr);
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]461}
462
Nirav Dave6c0665e2018-04-30 19:22:40 +0000[diff] [blame]463bool MCExpr::evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm) const {
464 return evaluateAsAbsolute(Res, Asm, nullptr, nullptr);
465}
466
Rafael Espindoladbb40212015-03-25 00:25:37 +0000[diff] [blame]467bool MCExpr::evaluateKnownAbsolute(int64_t &Res,
468 const MCAsmLayout &Layout) const {
469 return evaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, nullptr,
470 true);
Rafael Espindolaadbe0242014-08-15 14:20:32 +0000[diff] [blame]471}
472
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]473bool MCExpr::evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]474 const MCAsmLayout *Layout,
Rafael Espindola93e3cf02010-12-07 00:27:36 +0000[diff] [blame]475 const SectionAddrMap *Addrs) const {
Rafael Espindolaadbe0242014-08-15 14:20:32 +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.
479 return evaluateAsAbsolute(Res, Asm, Layout, Addrs, Addrs);
480}
481
482bool MCExpr::evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
483 const MCAsmLayout *Layout,
484 const SectionAddrMap *Addrs, bool InSet) const {
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]485 MCValue Value;
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]486
Daniel Dunbar5cfb5872010-03-23 23:47:07 +0000[diff] [blame]487 // Fast path constants.
488 if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(this)) {
489 Res = CE->getValue();
490 return true;
491 }
492
Rafael Espindolaf275ad82015-03-25 13:16:53 +0000[diff] [blame]493 bool IsRelocatable =
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]494 evaluateAsRelocatableImpl(Value, Asm, Layout, nullptr, Addrs, InSet);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]495
Rafael Espindola4124ab12010-12-22 22:16:24 +0000[diff] [blame]496 // Record the current value.
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]497 Res = Value.getConstant();
Rafael Espindola4124ab12010-12-22 22:16:24 +0000[diff] [blame]498
499 return IsRelocatable && Value.isAbsolute();
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]500}
501
Adrian Prantl5f8f34e42018-05-01 15:54:18 +0000[diff] [blame]502/// Helper method for \see EvaluateSymbolAdd().
Rafael Espindola59f90b22015-03-25 19:24:39 +0000[diff] [blame]503static void AttemptToFoldSymbolOffsetDifference(
504 const MCAssembler *Asm, const MCAsmLayout *Layout,
505 const SectionAddrMap *Addrs, bool InSet, const MCSymbolRefExpr *&A,
506 const MCSymbolRefExpr *&B, int64_t &Addend) {
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]507 if (!A || !B)
508 return;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]509
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]510 const MCSymbol &SA = A->getSymbol();
511 const MCSymbol &SB = B->getSymbol();
512
513 if (SA.isUndefined() || SB.isUndefined())
514 return;
515
Jim Grosbach36e60e92015-06-04 22:24:41 +0000[diff] [blame]516 if (!Asm->getWriter().isSymbolRefDifferenceFullyResolved(*Asm, A, B, InSet))
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]517 return;
518
Rafael Espindolae3a20f52015-10-05 12:07:05 +0000[diff] [blame]519 if (SA.getFragment() == SB.getFragment() && !SA.isVariable() &&
Nirav Dave6c0665e2018-04-30 19:22:40 +0000[diff] [blame]520 !SA.isUnset() && !SB.isVariable() && !SB.isUnset()) {
Rafael Espindola14672502015-05-29 17:48:04 +0000[diff] [blame]521 Addend += (SA.getOffset() - SB.getOffset());
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]522
Owen Anderson97462862011-03-21 23:13:43 +0000[diff] [blame]523 // Pointers to Thumb symbols need to have their low-bit set to allow
524 // for interworking.
525 if (Asm->isThumbFunc(&SA))
526 Addend |= 1;
527
Aleksandar Beserminjia5949432018-10-16 08:27:28 +0000[diff] [blame]528 // If symbol is labeled as micromips, we set low-bit to ensure
529 // correct offset in .gcc_except_table
530 if (Asm->getBackend().isMicroMips(&SA))
531 Addend |= 1;
532
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]533 // Clear the symbol expr pointers to indicate we have folded these
534 // operands.
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]535 A = B = nullptr;
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]536 return;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]537 }
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]538
539 if (!Layout)
540 return;
541
Rafael Espindola4d37b2a2015-05-29 21:45:01 +0000[diff] [blame]542 const MCSection &SecA = *SA.getFragment()->getParent();
543 const MCSection &SecB = *SB.getFragment()->getParent();
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]544
545 if ((&SecA != &SecB) && !Addrs)
546 return;
547
548 // Eagerly evaluate.
Duncan P. N. Exon Smith2a404832015-05-19 23:53:20 +0000[diff] [blame]549 Addend += Layout->getSymbolOffset(A->getSymbol()) -
550 Layout->getSymbolOffset(B->getSymbol());
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]551 if (Addrs && (&SecA != &SecB))
Rafael Espindola079027e2015-05-26 00:52:18 +0000[diff] [blame]552 Addend += (Addrs->lookup(&SecA) - Addrs->lookup(&SecB));
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]553
Jim Grosbach213039a2012-02-24 05:12:18 +0000[diff] [blame]554 // Pointers to Thumb symbols need to have their low-bit set to allow
555 // for interworking.
556 if (Asm->isThumbFunc(&SA))
557 Addend |= 1;
558
Petar Jovanovic3cfcd752019-02-07 22:57:33 +0000[diff] [blame]559 // If symbol is labeled as micromips, we set low-bit to ensure
560 // correct offset in .gcc_except_table
561 if (Asm->getBackend().isMicroMips(&SA))
562 Addend |= 1;
563
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]564 // Clear the symbol expr pointers to indicate we have folded these
565 // operands.
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]566 A = B = nullptr;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]567}
568
Adrian Prantl5f8f34e42018-05-01 15:54:18 +0000[diff] [blame]569/// Evaluate the result of an add between (conceptually) two MCValues.
Daniel Dunbar395a0992010-12-16 18:36:25 +0000[diff] [blame]570///
571/// This routine conceptually attempts to construct an MCValue:
572/// Result = (Result_A - Result_B + Result_Cst)
573/// from two MCValue's LHS and RHS where
574/// Result = LHS + RHS
575/// and
576/// Result = (LHS_A - LHS_B + LHS_Cst) + (RHS_A - RHS_B + RHS_Cst).
577///
578/// This routine attempts to aggresively fold the operands such that the result
579/// is representable in an MCValue, but may not always succeed.
580///
581/// \returns True on success, false if the result is not representable in an
582/// MCValue.
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]583
584/// NOTE: It is really important to have both the Asm and Layout arguments.
585/// They might look redundant, but this function can be used before layout
586/// is done (see the object streamer for example) and having the Asm argument
Rafael Espindola1ea7f182010-12-18 04:01:45 +0000[diff] [blame]587/// lets us avoid relaxations early.
Rafael Espindola59f90b22015-03-25 19:24:39 +0000[diff] [blame]588static bool
589EvaluateSymbolicAdd(const MCAssembler *Asm, const MCAsmLayout *Layout,
590 const SectionAddrMap *Addrs, bool InSet, const MCValue &LHS,
591 const MCSymbolRefExpr *RHS_A, const MCSymbolRefExpr *RHS_B,
592 int64_t RHS_Cst, MCValue &Res) {
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]593 // FIXME: This routine (and other evaluation parts) are *incredibly* sloppy
594 // about dealing with modifiers. This will ultimately bite us, one day.
595 const MCSymbolRefExpr *LHS_A = LHS.getSymA();
596 const MCSymbolRefExpr *LHS_B = LHS.getSymB();
597 int64_t LHS_Cst = LHS.getConstant();
598
599 // Fold the result constant immediately.
600 int64_t Result_Cst = LHS_Cst + RHS_Cst;
601
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]602 assert((!Layout || Asm) &&
603 "Must have an assembler object if layout is given!");
604
Alex Bradbury257d5b52018-05-23 12:36:18 +0000[diff] [blame]605 // If we have a layout, we can fold resolved differences. Do not do this if
606 // the backend requires this to be emitted as individual relocations, unless
607 // the InSet flag is set to get the current difference anyway (used for
608 // example to calculate symbol sizes).
609 if (Asm &&
610 (InSet || !Asm->getBackend().requiresDiffExpressionRelocations())) {
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]611 // First, fold out any differences which are fully resolved. By
612 // reassociating terms in
613 // Result = (LHS_A - LHS_B + LHS_Cst) + (RHS_A - RHS_B + RHS_Cst).
614 // we have the four possible differences:
615 // (LHS_A - LHS_B),
616 // (LHS_A - RHS_B),
617 // (RHS_A - LHS_B),
618 // (RHS_A - RHS_B).
Chris Lattner0ab5e2c2011-04-15 05:18:47 +0000[diff] [blame]619 // Since we are attempting to be as aggressive as possible about folding, we
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]620 // attempt to evaluate each possible alternative.
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]621 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, LHS_A, LHS_B,
622 Result_Cst);
623 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, LHS_A, RHS_B,
624 Result_Cst);
625 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, RHS_A, LHS_B,
626 Result_Cst);
627 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, RHS_A, RHS_B,
628 Result_Cst);
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]629 }
630
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]631 // We can't represent the addition or subtraction of two symbols.
632 if ((LHS_A && RHS_A) || (LHS_B && RHS_B))
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]633 return false;
634
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]635 // At this point, we have at most one additive symbol and one subtractive
636 // symbol -- find them.
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]637 const MCSymbolRefExpr *A = LHS_A ? LHS_A : RHS_A;
638 const MCSymbolRefExpr *B = LHS_B ? LHS_B : RHS_B;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]639
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]640 Res = MCValue::get(A, B, Result_Cst);
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]641 return true;
642}
643
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]644bool MCExpr::evaluateAsRelocatable(MCValue &Res,
Joerg Sonnenberger752b91b2014-08-10 11:35:12 +0000[diff] [blame]645 const MCAsmLayout *Layout,
Joerg Sonnenbergerb696d462014-08-10 11:37:07 +0000[diff] [blame]646 const MCFixup *Fixup) const {
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]647 MCAssembler *Assembler = Layout ? &Layout->getAssembler() : nullptr;
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]648 return evaluateAsRelocatableImpl(Res, Assembler, Layout, Fixup, nullptr,
Rafael Espindolaf275ad82015-03-25 13:16:53 +0000[diff] [blame]649 false);
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]650}
651
Rafael Espindolaaeed3cb2015-03-26 21:11:00 +0000[diff] [blame]652bool MCExpr::evaluateAsValue(MCValue &Res, const MCAsmLayout &Layout) const {
653 MCAssembler *Assembler = &Layout.getAssembler();
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]654 return evaluateAsRelocatableImpl(Res, Assembler, &Layout, nullptr, nullptr,
Rafael Espindolaaeed3cb2015-03-26 21:11:00 +0000[diff] [blame]655 true);
656}
657
Rafael Espindolae3a20f52015-10-05 12:07:05 +0000[diff] [blame]658static bool canExpand(const MCSymbol &Sym, bool InSet) {
Rafael Espindola212fdde2015-06-03 21:52:06 +0000[diff] [blame]659 const MCExpr *Expr = Sym.getVariableValue();
660 const auto *Inner = dyn_cast<MCSymbolRefExpr>(Expr);
661 if (Inner) {
662 if (Inner->getKind() == MCSymbolRefExpr::VK_WEAKREF)
663 return false;
664 }
665
Rafael Espindolaaeed3cb2015-03-26 21:11:00 +0000[diff] [blame]666 if (InSet)
667 return true;
Rafael Espindolae3a20f52015-10-05 12:07:05 +0000[diff] [blame]668 return !Sym.isInSection();
Rafael Espindolabc91d7e2014-04-28 20:53:11 +0000[diff] [blame]669}
670
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]671bool MCExpr::evaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm,
Rafael Espindola4262a222010-10-16 18:23:53 +0000[diff] [blame]672 const MCAsmLayout *Layout,
Joerg Sonnenberger752b91b2014-08-10 11:35:12 +0000[diff] [blame]673 const MCFixup *Fixup,
Rafael Espindolaf275ad82015-03-25 13:16:53 +0000[diff] [blame]674 const SectionAddrMap *Addrs,
675 bool InSet) const {
Daniel Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]676 ++stats::MCExprEvaluate;
677
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]678 switch (getKind()) {
Chris Lattner38d022e2010-02-08 19:41:07 +0000[diff] [blame]679 case Target:
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]680 return cast<MCTargetExpr>(this)->evaluateAsRelocatableImpl(Res, Layout,
Joerg Sonnenberger752b91b2014-08-10 11:35:12 +0000[diff] [blame]681 Fixup);
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]682
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]683 case Constant:
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]684 Res = MCValue::get(cast<MCConstantExpr>(this)->getValue());
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]685 return true;
686
687 case SymbolRef: {
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]688 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
689 const MCSymbol &Sym = SRE->getSymbol();
Daniel Dunbar17b90272009-10-16 01:33:57 +0000[diff] [blame]690
691 // Evaluate recursively if this is a variable.
Rafael Espindolaf275ad82015-03-25 13:16:53 +0000[diff] [blame]692 if (Sym.isVariable() && SRE->getKind() == MCSymbolRefExpr::VK_None &&
Rafael Espindolae3a20f52015-10-05 12:07:05 +0000[diff] [blame]693 canExpand(Sym, InSet)) {
Rafael Espindolaaeed3cb2015-03-26 21:11:00 +0000[diff] [blame]694 bool IsMachO = SRE->hasSubsectionsViaSymbols();
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]695 if (Sym.getVariableValue()->evaluateAsRelocatableImpl(
Rafael Espindolaaeed3cb2015-03-26 21:11:00 +0000[diff] [blame]696 Res, Asm, Layout, Fixup, Addrs, InSet || IsMachO)) {
697 if (!IsMachO)
Rafael Espindolaf275ad82015-03-25 13:16:53 +0000[diff] [blame]698 return true;
699
Rafael Espindola7fadc0e2014-03-20 02:12:01 +0000[diff] [blame]700 const MCSymbolRefExpr *A = Res.getSymA();
701 const MCSymbolRefExpr *B = Res.getSymB();
Rafael Espindolaf275ad82015-03-25 13:16:53 +0000[diff] [blame]702 // FIXME: This is small hack. Given
703 // a = b + 4
704 // .long a
705 // the OS X assembler will completely drop the 4. We should probably
706 // include it in the relocation or produce an error if that is not
707 // possible.
Evgeniy Stepanov60d411b2017-06-08 20:49:03 +0000[diff] [blame]708 // Allow constant expressions.
Rafael Espindolaf275ad82015-03-25 13:16:53 +0000[diff] [blame]709 if (!A && !B)
710 return true;
Evgeniy Stepanov60d411b2017-06-08 20:49:03 +0000[diff] [blame]711 // Allows aliases with zero offset.
712 if (Res.getConstant() == 0 && (!A || !B))
713 return true;
Rafael Espindola7fadc0e2014-03-20 02:12:01 +0000[diff] [blame]714 }
Rafael Espindola8c3039b2010-11-15 16:33:49 +0000[diff] [blame]715 }
Daniel Dunbar17b90272009-10-16 01:33:57 +0000[diff] [blame]716
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]717 Res = MCValue::get(SRE, nullptr, 0);
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]718 return true;
719 }
720
721 case Unary: {
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]722 const MCUnaryExpr *AUE = cast<MCUnaryExpr>(this);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]723 MCValue Value;
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]724
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]725 if (!AUE->getSubExpr()->evaluateAsRelocatableImpl(Value, Asm, Layout, Fixup,
Rafael Espindolaf275ad82015-03-25 13:16:53 +0000[diff] [blame]726 Addrs, InSet))
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]727 return false;
728
729 switch (AUE->getOpcode()) {
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]730 case MCUnaryExpr::LNot:
Daniel Dunbar0d5fc9a2009-07-01 06:48:00 +0000[diff] [blame]731 if (!Value.isAbsolute())
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]732 return false;
733 Res = MCValue::get(!Value.getConstant());
734 break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]735 case MCUnaryExpr::Minus:
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]736 /// -(a - b + const) ==> (b - a - const)
Daniel Dunbar7f8a9eb2009-08-11 17:47:52 +0000[diff] [blame]737 if (Value.getSymA() && !Value.getSymB())
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]738 return false;
Sanjay Patel42bbe772016-05-20 14:09:41 +0000[diff] [blame]739
740 // The cast avoids undefined behavior if the constant is INT64_MIN.
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]741 Res = MCValue::get(Value.getSymB(), Value.getSymA(),
Sanjay Patel42bbe772016-05-20 14:09:41 +0000[diff] [blame]742 -(uint64_t)Value.getConstant());
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]743 break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]744 case MCUnaryExpr::Not:
Daniel Dunbar0d5fc9a2009-07-01 06:48:00 +0000[diff] [blame]745 if (!Value.isAbsolute())
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]746 return false;
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]747 Res = MCValue::get(~Value.getConstant());
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]748 break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]749 case MCUnaryExpr::Plus:
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]750 Res = Value;
751 break;
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]752 }
753
754 return true;
755 }
756
757 case Binary: {
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]758 const MCBinaryExpr *ABE = cast<MCBinaryExpr>(this);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]759 MCValue LHSValue, RHSValue;
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]760
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]761 if (!ABE->getLHS()->evaluateAsRelocatableImpl(LHSValue, Asm, Layout, Fixup,
Rafael Espindolaf275ad82015-03-25 13:16:53 +0000[diff] [blame]762 Addrs, InSet) ||
Jim Grosbach13760bd2015-05-30 01:25:56 +0000[diff] [blame]763 !ABE->getRHS()->evaluateAsRelocatableImpl(RHSValue, Asm, Layout, Fixup,
Nirav Dave7fd992a2018-08-16 16:31:14 +0000[diff] [blame]764 Addrs, InSet)) {
765 // Check if both are Target Expressions, see if we can compare them.
766 if (const MCTargetExpr *L = dyn_cast<MCTargetExpr>(ABE->getLHS()))
767 if (const MCTargetExpr *R = cast<MCTargetExpr>(ABE->getRHS())) {
768 switch (ABE->getOpcode()) {
769 case MCBinaryExpr::EQ:
770 Res = MCValue::get((L->isEqualTo(R)) ? -1 : 0);
771 return true;
772 case MCBinaryExpr::NE:
773 Res = MCValue::get((R->isEqualTo(R)) ? 0 : -1);
774 return true;
Nirav Daveeb189a02018-08-16 17:22:31 +0000[diff] [blame]775 default: break;
Nirav Dave7fd992a2018-08-16 16:31:14 +0000[diff] [blame]776 }
777 }
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]778 return false;
Nirav Dave7fd992a2018-08-16 16:31:14 +0000[diff] [blame]779 }
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]780
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]781 // We only support a few operations on non-constant expressions, handle
782 // those first.
Daniel Dunbar0d5fc9a2009-07-01 06:48:00 +0000[diff] [blame]783 if (!LHSValue.isAbsolute() || !RHSValue.isAbsolute()) {
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]784 switch (ABE->getOpcode()) {
785 default:
786 return false;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]787 case MCBinaryExpr::Sub:
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]788 // Negate RHS and add.
Sanjay Patel42bbe772016-05-20 14:09:41 +0000[diff] [blame]789 // The cast avoids undefined behavior if the constant is INT64_MIN.
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]790 return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]791 RHSValue.getSymB(), RHSValue.getSymA(),
Sanjay Patel42bbe772016-05-20 14:09:41 +0000[diff] [blame]792 -(uint64_t)RHSValue.getConstant(), Res);
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]793
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]794 case MCBinaryExpr::Add:
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]795 return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]796 RHSValue.getSymA(), RHSValue.getSymB(),
Rafael Espindola59f90b22015-03-25 19:24:39 +0000[diff] [blame]797 RHSValue.getConstant(), Res);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]798 }
799 }
800
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]801 // FIXME: We need target hooks for the evaluation. It may be limited in
Ahmed Bougacha177c1482015-04-28 00:21:32 +0000[diff] [blame]802 // width, and gas defines the result of comparisons differently from
803 // Apple as.
Daniel Dunbar39712732009-06-30 16:02:47 +0000[diff] [blame]804 int64_t LHS = LHSValue.getConstant(), RHS = RHSValue.getConstant();
805 int64_t Result = 0;
Bill Wendling2a302212018-05-14 05:25:36 +0000[diff] [blame]806 auto Op = ABE->getOpcode();
807 switch (Op) {
Ahmed Bougacha177c1482015-04-28 00:21:32 +0000[diff] [blame]808 case MCBinaryExpr::AShr: Result = LHS >> RHS; break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]809 case MCBinaryExpr::Add: Result = LHS + RHS; break;
810 case MCBinaryExpr::And: Result = LHS & RHS; break;
Davide Italiano983366a2015-09-11 22:04:21 +0000[diff] [blame]811 case MCBinaryExpr::Div:
Simon Pilgrim8831f6e2018-02-22 18:06:48 +0000[diff] [blame]812 case MCBinaryExpr::Mod:
Davide Italiano63cee812015-09-11 20:47:35 +0000[diff] [blame]813 // Handle division by zero. gas just emits a warning and keeps going,
814 // we try to be stricter.
815 // FIXME: Currently the caller of this function has no way to understand
816 // we're bailing out because of 'division by zero'. Therefore, it will
817 // emit a 'expected relocatable expression' error. It would be nice to
818 // change this code to emit a better diagnostic.
819 if (RHS == 0)
820 return false;
Simon Pilgrim8831f6e2018-02-22 18:06:48 +0000[diff] [blame]821 if (ABE->getOpcode() == MCBinaryExpr::Div)
822 Result = LHS / RHS;
823 else
824 Result = LHS % RHS;
Davide Italiano983366a2015-09-11 22:04:21 +0000[diff] [blame]825 break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]826 case MCBinaryExpr::EQ: Result = LHS == RHS; break;
827 case MCBinaryExpr::GT: Result = LHS > RHS; break;
828 case MCBinaryExpr::GTE: Result = LHS >= RHS; break;
829 case MCBinaryExpr::LAnd: Result = LHS && RHS; break;
830 case MCBinaryExpr::LOr: Result = LHS || RHS; break;
Ahmed Bougacha177c1482015-04-28 00:21:32 +0000[diff] [blame]831 case MCBinaryExpr::LShr: Result = uint64_t(LHS) >> uint64_t(RHS); break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]832 case MCBinaryExpr::LT: Result = LHS < RHS; break;
833 case MCBinaryExpr::LTE: Result = LHS <= RHS; break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]834 case MCBinaryExpr::Mul: Result = LHS * RHS; break;
835 case MCBinaryExpr::NE: Result = LHS != RHS; break;
836 case MCBinaryExpr::Or: Result = LHS | RHS; break;
Justin Bognerc1602152015-06-23 07:32:55 +0000[diff] [blame]837 case MCBinaryExpr::Shl: Result = uint64_t(LHS) << uint64_t(RHS); break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]838 case MCBinaryExpr::Sub: Result = LHS - RHS; break;
839 case MCBinaryExpr::Xor: Result = LHS ^ RHS; break;
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]840 }
841
Bill Wendling2a302212018-05-14 05:25:36 +0000[diff] [blame]842 switch (Op) {
843 default:
844 Res = MCValue::get(Result);
845 break;
846 case MCBinaryExpr::EQ:
847 case MCBinaryExpr::GT:
848 case MCBinaryExpr::GTE:
849 case MCBinaryExpr::LT:
850 case MCBinaryExpr::LTE:
851 case MCBinaryExpr::NE:
852 // A comparison operator returns a -1 if true and 0 if false.
853 Res = MCValue::get(Result ? -1 : 0);
854 break;
855 }
856
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]857 return true;
858 }
859 }
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]860
Craig Toppera2886c22012-02-07 05:05:23 +0000[diff] [blame]861 llvm_unreachable("Invalid assembly expression kind!");
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]862}
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]863
Rafael Espindolae3a20f52015-10-05 12:07:05 +0000[diff] [blame]864MCFragment *MCExpr::findAssociatedFragment() const {
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]865 switch (getKind()) {
866 case Target:
867 // We never look through target specific expressions.
Rafael Espindolae3a20f52015-10-05 12:07:05 +0000[diff] [blame]868 return cast<MCTargetExpr>(this)->findAssociatedFragment();
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]869
870 case Constant:
Rafael Espindolae3a20f52015-10-05 12:07:05 +0000[diff] [blame]871 return MCSymbol::AbsolutePseudoFragment;
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]872
873 case SymbolRef: {
874 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
875 const MCSymbol &Sym = SRE->getSymbol();
Rafael Espindolae3a20f52015-10-05 12:07:05 +0000[diff] [blame]876 return Sym.getFragment();
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]877 }
878
879 case Unary:
Rafael Espindolae3a20f52015-10-05 12:07:05 +0000[diff] [blame]880 return cast<MCUnaryExpr>(this)->getSubExpr()->findAssociatedFragment();
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]881
882 case Binary: {
883 const MCBinaryExpr *BE = cast<MCBinaryExpr>(this);
Rafael Espindolae3a20f52015-10-05 12:07:05 +0000[diff] [blame]884 MCFragment *LHS_F = BE->getLHS()->findAssociatedFragment();
885 MCFragment *RHS_F = BE->getRHS()->findAssociatedFragment();
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]886
Rafael Espindolae3a20f52015-10-05 12:07:05 +0000[diff] [blame]887 // If either is absolute, return the other.
888 if (LHS_F == MCSymbol::AbsolutePseudoFragment)
889 return RHS_F;
890 if (RHS_F == MCSymbol::AbsolutePseudoFragment)
891 return LHS_F;
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]892
Peter Collingbourne10d362c2015-04-03 01:46:11 +0000[diff] [blame]893 // Not always correct, but probably the best we can do without more context.
894 if (BE->getOpcode() == MCBinaryExpr::Sub)
Rafael Espindolae3a20f52015-10-05 12:07:05 +0000[diff] [blame]895 return MCSymbol::AbsolutePseudoFragment;
Peter Collingbourne10d362c2015-04-03 01:46:11 +0000[diff] [blame]896
Rafael Espindolae3a20f52015-10-05 12:07:05 +0000[diff] [blame]897 // Otherwise, return the first non-null fragment.
898 return LHS_F ? LHS_F : RHS_F;
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]899 }
900 }
901
Craig Toppera2886c22012-02-07 05:05:23 +0000[diff] [blame]902 llvm_unreachable("Invalid assembly expression kind!");
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]903}