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review.blissroms.org / platform_external_llvm80 / refs/heads/r / . / lib / MC / MCExpr.cpp
blob: 0e4174a7a4c94794e9193bddef95997a67e54f78 [file] [log] [blame]
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]1//===- MCExpr.cpp - Assembly Level Expression Implementation --------------===//
Daniel Dunbarfc6877a2009-06-29 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
Chandler Carruthe3e43d92017-06-06 11:49:48 +0000[diff] [blame]10#include "llvm/MC/MCExpr.h"
Daniel Dunbarff547842010-03-23 23:47:14 +0000[diff] [blame]11#include "llvm/ADT/Statistic.h"
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]12#include "llvm/ADT/StringSwitch.h"
Nico Weber0f38c602018-04-30 14:59:11 +0000[diff] [blame]13#include "llvm/Config/llvm-config.h"
Alex Bradburye54d5392018-05-23 12:36:18 +0000[diff] [blame]14#include "llvm/MC/MCAsmBackend.h"
David Peixotto0fc8c682013-12-04 22:43:20 +0000[diff] [blame]15#include "llvm/MC/MCAsmInfo.h"
Daniel Dunbar979ba5b2010-03-11 05:53:37 +0000[diff] [blame]16#include "llvm/MC/MCAsmLayout.h"
17#include "llvm/MC/MCAssembler.h"
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]18#include "llvm/MC/MCContext.h"
Craig Topperf1d0f772012-03-26 06:58:25 +0000[diff] [blame]19#include "llvm/MC/MCObjectWriter.h"
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]20#include "llvm/MC/MCSymbol.h"
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]21#include "llvm/MC/MCValue.h"
Eugene Zelenkof31871c2017-02-07 23:02:00 +0000[diff] [blame]22#include "llvm/Support/Casting.h"
23#include "llvm/Support/Compiler.h"
David Greene5d2bcb12010-01-05 01:28:07 +0000[diff] [blame]24#include "llvm/Support/Debug.h"
Chandler Carruth732f05c2012-01-10 18:08:01 +0000[diff] [blame]25#include "llvm/Support/ErrorHandling.h"
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]26#include "llvm/Support/raw_ostream.h"
Eugene Zelenkof31871c2017-02-07 23:02:00 +0000[diff] [blame]27#include <cassert>
28#include <cstdint>
29
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]30using namespace llvm;
31
Chandler Carruth0d338a52014-04-22 03:04:17 +0000[diff] [blame]32#define DEBUG_TYPE "mcexpr"
33
Daniel Dunbarff547842010-03-23 23:47:14 +0000[diff] [blame]34namespace {
35namespace stats {
Eugene Zelenkof31871c2017-02-07 23:02:00 +0000[diff] [blame]36
Daniel Dunbarff547842010-03-23 23:47:14 +0000[diff] [blame]37STATISTIC(MCExprEvaluate, "Number of MCExpr evaluations");
Eugene Zelenkof31871c2017-02-07 23:02:00 +0000[diff] [blame]38
39} // end namespace stats
40} // end anonymous namespace
Daniel Dunbarff547842010-03-23 23:47:14 +0000[diff] [blame]41
Daniel Sandersc8b0a112016-05-03 13:35:44 +0000[diff] [blame]42void MCExpr::print(raw_ostream &OS, const MCAsmInfo *MAI, bool InParens) const {
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]43 switch (getKind()) {
Chris Lattner5d917a82010-02-08 19:41:07 +0000[diff] [blame]44 case MCExpr::Target:
Matt Arsenaultd99ce2f2015-06-09 00:31:39 +0000[diff] [blame]45 return cast<MCTargetExpr>(this)->printImpl(OS, MAI);
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]46 case MCExpr::Constant:
47 OS << cast<MCConstantExpr>(*this).getValue();
48 return;
49
Chris Lattnerd50c2b92009-09-08 23:20:50 +0000[diff] [blame]50 case MCExpr::SymbolRef: {
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]51 const MCSymbolRefExpr &SRE = cast<MCSymbolRefExpr>(*this);
52 const MCSymbol &Sym = SRE.getSymbol();
Chris Lattner1e61e692010-11-15 02:46:57 +0000[diff] [blame]53 // Parenthesize names that start with $ so that they don't look like
54 // absolute names.
Daniel Sandersc8b0a112016-05-03 13:35:44 +0000[diff] [blame]55 bool UseParens =
Eugene Zelenkof31871c2017-02-07 23:02:00 +0000[diff] [blame]56 !InParens && !Sym.getName().empty() && Sym.getName()[0] == '$';
Matt Arsenaultd99ce2f2015-06-09 00:31:39 +0000[diff] [blame]57 if (UseParens) {
58 OS << '(';
59 Sym.print(OS, MAI);
60 OS << ')';
61 } else
62 Sym.print(OS, MAI);
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]63
Benjamin Kramerb1bba1a2014-10-11 17:57:27 +0000[diff] [blame]64 if (SRE.getKind() != MCSymbolRefExpr::VK_None)
65 SRE.printVariantKind(OS);
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]66
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]67 return;
Chris Lattnerd50c2b92009-09-08 23:20:50 +0000[diff] [blame]68 }
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]69
70 case MCExpr::Unary: {
71 const MCUnaryExpr &UE = cast<MCUnaryExpr>(*this);
72 switch (UE.getOpcode()) {
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]73 case MCUnaryExpr::LNot: OS << '!'; break;
74 case MCUnaryExpr::Minus: OS << '-'; break;
75 case MCUnaryExpr::Not: OS << '~'; break;
76 case MCUnaryExpr::Plus: OS << '+'; break;
77 }
Bill Wendling558d7242018-05-14 05:25:36 +0000[diff] [blame]78 bool Binary = UE.getSubExpr()->getKind() == MCExpr::Binary;
79 if (Binary) OS << "(";
Matt Arsenaultd99ce2f2015-06-09 00:31:39 +0000[diff] [blame]80 UE.getSubExpr()->print(OS, MAI);
Bill Wendling558d7242018-05-14 05:25:36 +0000[diff] [blame]81 if (Binary) OS << ")";
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]82 return;
83 }
84
85 case MCExpr::Binary: {
86 const MCBinaryExpr &BE = cast<MCBinaryExpr>(*this);
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]87
Chris Lattnerbe73e8c2009-09-08 06:34:07 +0000[diff] [blame]88 // Only print parens around the LHS if it is non-trivial.
89 if (isa<MCConstantExpr>(BE.getLHS()) || isa<MCSymbolRefExpr>(BE.getLHS())) {
Matt Arsenaultd99ce2f2015-06-09 00:31:39 +0000[diff] [blame]90 BE.getLHS()->print(OS, MAI);
Chris Lattnerbe73e8c2009-09-08 06:34:07 +0000[diff] [blame]91 } else {
Matt Arsenaultd99ce2f2015-06-09 00:31:39 +0000[diff] [blame]92 OS << '(';
93 BE.getLHS()->print(OS, MAI);
94 OS << ')';
Chris Lattnerbe73e8c2009-09-08 06:34:07 +0000[diff] [blame]95 }
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]96
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]97 switch (BE.getOpcode()) {
Chris Lattnerd19ceb92009-09-08 06:37:35 +0000[diff] [blame]98 case MCBinaryExpr::Add:
99 // Print "X-42" instead of "X+-42".
100 if (const MCConstantExpr *RHSC = dyn_cast<MCConstantExpr>(BE.getRHS())) {
101 if (RHSC->getValue() < 0) {
102 OS << RHSC->getValue();
103 return;
104 }
105 }
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]106
Chris Lattnerd19ceb92009-09-08 06:37:35 +0000[diff] [blame]107 OS << '+';
108 break;
Ahmed Bougachadac39b12015-04-28 00:21:32 +0000[diff] [blame]109 case MCBinaryExpr::AShr: OS << ">>"; break;
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]110 case MCBinaryExpr::And: OS << '&'; break;
111 case MCBinaryExpr::Div: OS << '/'; break;
112 case MCBinaryExpr::EQ: OS << "=="; break;
113 case MCBinaryExpr::GT: OS << '>'; break;
114 case MCBinaryExpr::GTE: OS << ">="; break;
115 case MCBinaryExpr::LAnd: OS << "&&"; break;
116 case MCBinaryExpr::LOr: OS << "||"; break;
Ahmed Bougachadac39b12015-04-28 00:21:32 +0000[diff] [blame]117 case MCBinaryExpr::LShr: OS << ">>"; break;
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]118 case MCBinaryExpr::LT: OS << '<'; break;
119 case MCBinaryExpr::LTE: OS << "<="; break;
120 case MCBinaryExpr::Mod: OS << '%'; break;
121 case MCBinaryExpr::Mul: OS << '*'; break;
122 case MCBinaryExpr::NE: OS << "!="; break;
123 case MCBinaryExpr::Or: OS << '|'; break;
124 case MCBinaryExpr::Shl: OS << "<<"; break;
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]125 case MCBinaryExpr::Sub: OS << '-'; break;
126 case MCBinaryExpr::Xor: OS << '^'; break;
127 }
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]128
Chris Lattnerbe73e8c2009-09-08 06:34:07 +0000[diff] [blame]129 // Only print parens around the LHS if it is non-trivial.
130 if (isa<MCConstantExpr>(BE.getRHS()) || isa<MCSymbolRefExpr>(BE.getRHS())) {
Matt Arsenaultd99ce2f2015-06-09 00:31:39 +0000[diff] [blame]131 BE.getRHS()->print(OS, MAI);
Chris Lattnerbe73e8c2009-09-08 06:34:07 +0000[diff] [blame]132 } else {
Matt Arsenaultd99ce2f2015-06-09 00:31:39 +0000[diff] [blame]133 OS << '(';
134 BE.getRHS()->print(OS, MAI);
135 OS << ')';
Chris Lattnerbe73e8c2009-09-08 06:34:07 +0000[diff] [blame]136 }
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]137 return;
138 }
139 }
140
Craig Topper85814382012-02-07 05:05:23 +0000[diff] [blame]141 llvm_unreachable("Invalid expression kind!");
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]142}
143
Aaron Ballman1d03d382017-10-15 14:32:27 +0000[diff] [blame]144#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
Yaron Keren55307982016-01-29 20:50:44 +0000[diff] [blame]145LLVM_DUMP_METHOD void MCExpr::dump() const {
Rafael Espindolaeac1f662015-05-27 13:05:42 +0000[diff] [blame]146 dbgs() << *this;
David Greene5d2bcb12010-01-05 01:28:07 +0000[diff] [blame]147 dbgs() << '\n';
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]148}
Matthias Braun88d20752017-01-28 02:02:38 +0000[diff] [blame]149#endif
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]150
151/* *** */
152
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]153const MCBinaryExpr *MCBinaryExpr::create(Opcode Opc, const MCExpr *LHS,
Chad Rosierb1330a52017-01-19 20:06:32 +0000[diff] [blame]154 const MCExpr *RHS, MCContext &Ctx,
155 SMLoc Loc) {
156 return new (Ctx) MCBinaryExpr(Opc, LHS, RHS, Loc);
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]157}
158
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]159const MCUnaryExpr *MCUnaryExpr::create(Opcode Opc, const MCExpr *Expr,
Sanne Wouda9f316a52017-03-10 13:08:20 +0000[diff] [blame]160 MCContext &Ctx, SMLoc Loc) {
161 return new (Ctx) MCUnaryExpr(Opc, Expr, Loc);
Daniel Dunbar9643ac52009-08-31 08:07:22 +0000[diff] [blame]162}
163
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]164const MCConstantExpr *MCConstantExpr::create(int64_t Value, MCContext &Ctx) {
Daniel Dunbar9643ac52009-08-31 08:07:22 +0000[diff] [blame]165 return new (Ctx) MCConstantExpr(Value);
166}
167
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]168/* *** */
169
Benjamin Kramerb1bba1a2014-10-11 17:57:27 +0000[diff] [blame]170MCSymbolRefExpr::MCSymbolRefExpr(const MCSymbol *Symbol, VariantKind Kind,
Chad Rosierb1330a52017-01-19 20:06:32 +0000[diff] [blame]171 const MCAsmInfo *MAI, SMLoc Loc)
172 : MCExpr(MCExpr::SymbolRef, Loc), Kind(Kind),
Benjamin Kramerb1bba1a2014-10-11 17:57:27 +0000[diff] [blame]173 UseParensForSymbolVariant(MAI->useParensForSymbolVariant()),
174 HasSubsectionsViaSymbols(MAI->hasSubsectionsViaSymbols()),
175 Symbol(Symbol) {
176 assert(Symbol);
177}
178
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]179const MCSymbolRefExpr *MCSymbolRefExpr::create(const MCSymbol *Sym,
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]180 VariantKind Kind,
Chad Rosierb1330a52017-01-19 20:06:32 +0000[diff] [blame]181 MCContext &Ctx, SMLoc Loc) {
182 return new (Ctx) MCSymbolRefExpr(Sym, Kind, Ctx.getAsmInfo(), Loc);
Daniel Dunbar9643ac52009-08-31 08:07:22 +0000[diff] [blame]183}
184
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]185const MCSymbolRefExpr *MCSymbolRefExpr::create(StringRef Name, VariantKind Kind,
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]186 MCContext &Ctx) {
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]187 return create(Ctx.getOrCreateSymbol(Name), Kind, Ctx);
Chris Lattner4f3e7aa2009-09-16 01:26:31 +0000[diff] [blame]188}
189
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]190StringRef MCSymbolRefExpr::getVariantKindName(VariantKind Kind) {
191 switch (Kind) {
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]192 case VK_Invalid: return "<<invalid>>";
193 case VK_None: return "<<none>>";
194
Colin LeMahieu89dcdff2016-02-10 18:32:01 +0000[diff] [blame]195 case VK_DTPOFF: return "DTPOFF";
196 case VK_DTPREL: return "DTPREL";
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]197 case VK_GOT: return "GOT";
198 case VK_GOTOFF: return "GOTOFF";
Colin LeMahieu3f9e7722016-02-09 19:17:34 +0000[diff] [blame]199 case VK_GOTREL: return "GOTREL";
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]200 case VK_GOTPCREL: return "GOTPCREL";
201 case VK_GOTTPOFF: return "GOTTPOFF";
202 case VK_INDNTPOFF: return "INDNTPOFF";
203 case VK_NTPOFF: return "NTPOFF";
Rafael Espindolaa0a2f872010-10-28 14:22:44 +0000[diff] [blame]204 case VK_GOTNTPOFF: return "GOTNTPOFF";
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]205 case VK_PLT: return "PLT";
206 case VK_TLSGD: return "TLSGD";
Rafael Espindolab4d17212010-10-28 15:02:40 +0000[diff] [blame]207 case VK_TLSLD: return "TLSLD";
Rafael Espindolaa264f722010-10-28 14:37:09 +0000[diff] [blame]208 case VK_TLSLDM: return "TLSLDM";
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]209 case VK_TPOFF: return "TPOFF";
Colin LeMahieu89dcdff2016-02-10 18:32:01 +0000[diff] [blame]210 case VK_TPREL: return "TPREL";
Davide Italiano32556002016-03-15 00:25:22 +0000[diff] [blame]211 case VK_TLSCALL: return "tlscall";
Davide Italiano87a6f752016-03-15 17:29:52 +0000[diff] [blame]212 case VK_TLSDESC: return "tlsdesc";
Chris Lattner6135a962010-11-14 22:22:59 +0000[diff] [blame]213 case VK_TLVP: return "TLVP";
Tim Northover7b837d82014-03-29 10:18:08 +0000[diff] [blame]214 case VK_TLVPPAGE: return "TLVPPAGE";
215 case VK_TLVPPAGEOFF: return "TLVPPAGEOFF";
216 case VK_PAGE: return "PAGE";
217 case VK_PAGEOFF: return "PAGEOFF";
218 case VK_GOTPAGE: return "GOTPAGE";
219 case VK_GOTPAGEOFF: return "GOTPAGEOFF";
Benjamin Kramer42734cf2013-03-30 16:21:50 +0000[diff] [blame]220 case VK_SECREL: return "SECREL32";
Davide Italiano8667ab72015-03-04 06:49:39 +0000[diff] [blame]221 case VK_SIZE: return "SIZE";
Rafael Espindola0a70f9b2014-03-20 02:12:01 +0000[diff] [blame]222 case VK_WEAKREF: return "WEAKREF";
Peter Collingbourne043d1a92017-01-31 18:28:44 +0000[diff] [blame]223 case VK_X86_ABS8: return "ABS8";
David Peixotto0fc8c682013-12-04 22:43:20 +0000[diff] [blame]224 case VK_ARM_NONE: return "none";
Peter Collingbourne7da53572015-10-26 18:23:16 +0000[diff] [blame]225 case VK_ARM_GOT_PREL: return "GOT_PREL";
David Peixotto0fc8c682013-12-04 22:43:20 +0000[diff] [blame]226 case VK_ARM_TARGET1: return "target1";
227 case VK_ARM_TARGET2: return "target2";
228 case VK_ARM_PREL31: return "prel31";
Saleem Abdulrasool5e3c87e2015-01-11 04:39:18 +0000[diff] [blame]229 case VK_ARM_SBREL: return "sbrel";
Kai Nacke843fa742014-01-20 11:00:40 +0000[diff] [blame]230 case VK_ARM_TLSLDO: return "tlsldo";
Saleem Abdulrasool2c9ed5d2014-01-30 04:02:47 +0000[diff] [blame]231 case VK_ARM_TLSDESCSEQ: return "tlsdescseq";
Dylan McKay4f045482017-12-09 08:01:28 +0000[diff] [blame]232 case VK_AVR_NONE: return "none";
233 case VK_AVR_LO8: return "lo8";
234 case VK_AVR_HI8: return "hi8";
235 case VK_AVR_HLO8: return "hlo8";
236 case VK_AVR_DIFF8: return "diff8";
237 case VK_AVR_DIFF16: return "diff16";
238 case VK_AVR_DIFF32: return "diff32";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]239 case VK_PPC_LO: return "l";
Ulrich Weigandd2849572013-06-21 14:42:49 +0000[diff] [blame]240 case VK_PPC_HI: return "h";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]241 case VK_PPC_HA: return "ha";
Sean Fertile80cb5472018-06-15 19:47:11 +0000[diff] [blame]242 case VK_PPC_HIGH: return "high";
243 case VK_PPC_HIGHA: return "higha";
Ulrich Weigandf7c1ee72013-06-21 14:43:42 +0000[diff] [blame]244 case VK_PPC_HIGHER: return "higher";
245 case VK_PPC_HIGHERA: return "highera";
246 case VK_PPC_HIGHEST: return "highest";
247 case VK_PPC_HIGHESTA: return "highesta";
Ulrich Weigand5de735a2013-06-25 16:49:50 +0000[diff] [blame]248 case VK_PPC_GOT_LO: return "got@l";
249 case VK_PPC_GOT_HI: return "got@h";
250 case VK_PPC_GOT_HA: return "got@ha";
Ulrich Weigand84656592013-06-20 22:39:42 +0000[diff] [blame]251 case VK_PPC_TOCBASE: return "tocbase";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]252 case VK_PPC_TOC: return "toc";
253 case VK_PPC_TOC_LO: return "toc@l";
Ulrich Weigandf8f87dc2013-06-21 14:43:10 +0000[diff] [blame]254 case VK_PPC_TOC_HI: return "toc@h";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]255 case VK_PPC_TOC_HA: return "toc@ha";
Ulrich Weigand228e0af2013-07-01 23:33:29 +0000[diff] [blame]256 case VK_PPC_DTPMOD: return "dtpmod";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]257 case VK_PPC_TPREL_LO: return "tprel@l";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]258 case VK_PPC_TPREL_HI: return "tprel@h";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]259 case VK_PPC_TPREL_HA: return "tprel@ha";
Sean Fertilea2448532018-06-15 19:47:16 +0000[diff] [blame]260 case VK_PPC_TPREL_HIGH: return "tprel@high";
261 case VK_PPC_TPREL_HIGHA: return "tprel@higha";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]262 case VK_PPC_TPREL_HIGHER: return "tprel@higher";
263 case VK_PPC_TPREL_HIGHERA: return "tprel@highera";
264 case VK_PPC_TPREL_HIGHEST: return "tprel@highest";
265 case VK_PPC_TPREL_HIGHESTA: return "tprel@highesta";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]266 case VK_PPC_DTPREL_LO: return "dtprel@l";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]267 case VK_PPC_DTPREL_HI: return "dtprel@h";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]268 case VK_PPC_DTPREL_HA: return "dtprel@ha";
Sean Fertilea2448532018-06-15 19:47:16 +0000[diff] [blame]269 case VK_PPC_DTPREL_HIGH: return "dtprel@high";
270 case VK_PPC_DTPREL_HIGHA: return "dtprel@higha";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]271 case VK_PPC_DTPREL_HIGHER: return "dtprel@higher";
272 case VK_PPC_DTPREL_HIGHERA: return "dtprel@highera";
273 case VK_PPC_DTPREL_HIGHEST: return "dtprel@highest";
274 case VK_PPC_DTPREL_HIGHESTA: return "dtprel@highesta";
275 case VK_PPC_GOT_TPREL: return "got@tprel";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]276 case VK_PPC_GOT_TPREL_LO: return "got@tprel@l";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]277 case VK_PPC_GOT_TPREL_HI: return "got@tprel@h";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]278 case VK_PPC_GOT_TPREL_HA: return "got@tprel@ha";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]279 case VK_PPC_GOT_DTPREL: return "got@dtprel";
280 case VK_PPC_GOT_DTPREL_LO: return "got@dtprel@l";
281 case VK_PPC_GOT_DTPREL_HI: return "got@dtprel@h";
282 case VK_PPC_GOT_DTPREL_HA: return "got@dtprel@ha";
Bill Schmidtd7802bf2012-12-04 16:18:08 +0000[diff] [blame]283 case VK_PPC_TLS: return "tls";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]284 case VK_PPC_GOT_TLSGD: return "got@tlsgd";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]285 case VK_PPC_GOT_TLSGD_LO: return "got@tlsgd@l";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]286 case VK_PPC_GOT_TLSGD_HI: return "got@tlsgd@h";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]287 case VK_PPC_GOT_TLSGD_HA: return "got@tlsgd@ha";
Ulrich Weigand7a345992013-07-09 16:41:09 +0000[diff] [blame]288 case VK_PPC_TLSGD: return "tlsgd";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]289 case VK_PPC_GOT_TLSLD: return "got@tlsld";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]290 case VK_PPC_GOT_TLSLD_LO: return "got@tlsld@l";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]291 case VK_PPC_GOT_TLSLD_HI: return "got@tlsld@h";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]292 case VK_PPC_GOT_TLSLD_HA: return "got@tlsld@ha";
Ulrich Weigand7a345992013-07-09 16:41:09 +0000[diff] [blame]293 case VK_PPC_TLSLD: return "tlsld";
Justin Hibbitsfcd08c22014-11-12 15:16:30 +0000[diff] [blame]294 case VK_PPC_LOCAL: return "local";
Reid Klecknerdd8ce122014-09-25 02:09:18 +0000[diff] [blame]295 case VK_COFF_IMGREL32: return "IMGREL";
Colin LeMahieua0362402015-05-01 21:14:21 +0000[diff] [blame]296 case VK_Hexagon_PCREL: return "PCREL";
297 case VK_Hexagon_LO16: return "LO16";
298 case VK_Hexagon_HI16: return "HI16";
299 case VK_Hexagon_GPREL: return "GPREL";
300 case VK_Hexagon_GD_GOT: return "GDGOT";
301 case VK_Hexagon_LD_GOT: return "LDGOT";
302 case VK_Hexagon_GD_PLT: return "GDPLT";
303 case VK_Hexagon_LD_PLT: return "LDPLT";
304 case VK_Hexagon_IE: return "IE";
305 case VK_Hexagon_IE_GOT: return "IEGOT";
Dan Gohmand73b41a2016-01-11 23:38:05 +0000[diff] [blame]306 case VK_WebAssembly_FUNCTION: return "FUNCTION";
Nicholas Wilson54c13542018-08-03 14:33:37 +0000[diff] [blame]307 case VK_WebAssembly_GLOBAL: return "GLOBAL";
Dan Gohman53ff96a2017-02-24 23:18:00 +0000[diff] [blame]308 case VK_WebAssembly_TYPEINDEX: return "TYPEINDEX";
Heejin Ahn8bcdd042018-11-14 02:46:21 +0000[diff] [blame]309 case VK_WebAssembly_EVENT: return "EVENT";
Konstantin Zhuravlyov84208dd2016-10-14 04:21:32 +0000[diff] [blame]310 case VK_AMDGPU_GOTPCREL32_LO: return "gotpcrel32@lo";
311 case VK_AMDGPU_GOTPCREL32_HI: return "gotpcrel32@hi";
312 case VK_AMDGPU_REL32_LO: return "rel32@lo";
313 case VK_AMDGPU_REL32_HI: return "rel32@hi";
Konstantin Zhuravlyovdb963fc2018-06-11 21:37:57 +0000[diff] [blame]314 case VK_AMDGPU_REL64: return "rel64";
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]315 }
Chandler Carruth732f05c2012-01-10 18:08:01 +0000[diff] [blame]316 llvm_unreachable("Invalid variant kind");
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]317}
318
319MCSymbolRefExpr::VariantKind
320MCSymbolRefExpr::getVariantKindForName(StringRef Name) {
Roman Divacky4be95032014-12-18 23:12:34 +0000[diff] [blame]321 return StringSwitch<VariantKind>(Name.lower())
Colin LeMahieu89dcdff2016-02-10 18:32:01 +0000[diff] [blame]322 .Case("dtprel", VK_DTPREL)
323 .Case("dtpoff", VK_DTPOFF)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]324 .Case("got", VK_GOT)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]325 .Case("gotoff", VK_GOTOFF)
Colin LeMahieu3f9e7722016-02-09 19:17:34 +0000[diff] [blame]326 .Case("gotrel", VK_GOTREL)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]327 .Case("gotpcrel", VK_GOTPCREL)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]328 .Case("gottpoff", VK_GOTTPOFF)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]329 .Case("indntpoff", VK_INDNTPOFF)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]330 .Case("ntpoff", VK_NTPOFF)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]331 .Case("gotntpoff", VK_GOTNTPOFF)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]332 .Case("plt", VK_PLT)
Davide Italiano32556002016-03-15 00:25:22 +0000[diff] [blame]333 .Case("tlscall", VK_TLSCALL)
Davide Italiano87a6f752016-03-15 17:29:52 +0000[diff] [blame]334 .Case("tlsdesc", VK_TLSDESC)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]335 .Case("tlsgd", VK_TLSGD)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]336 .Case("tlsld", VK_TLSLD)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]337 .Case("tlsldm", VK_TLSLDM)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]338 .Case("tpoff", VK_TPOFF)
Colin LeMahieu89dcdff2016-02-10 18:32:01 +0000[diff] [blame]339 .Case("tprel", VK_TPREL)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]340 .Case("tlvp", VK_TLVP)
Tim Northover7b837d82014-03-29 10:18:08 +0000[diff] [blame]341 .Case("tlvppage", VK_TLVPPAGE)
Tim Northover7b837d82014-03-29 10:18:08 +0000[diff] [blame]342 .Case("tlvppageoff", VK_TLVPPAGEOFF)
Tim Northover7b837d82014-03-29 10:18:08 +0000[diff] [blame]343 .Case("page", VK_PAGE)
Tim Northover7b837d82014-03-29 10:18:08 +0000[diff] [blame]344 .Case("pageoff", VK_PAGEOFF)
Tim Northover7b837d82014-03-29 10:18:08 +0000[diff] [blame]345 .Case("gotpage", VK_GOTPAGE)
Tim Northover7b837d82014-03-29 10:18:08 +0000[diff] [blame]346 .Case("gotpageoff", VK_GOTPAGEOFF)
Nico Rieck18d49ac2013-04-10 23:28:17 +0000[diff] [blame]347 .Case("imgrel", VK_COFF_IMGREL32)
Rafael Espindola93d0b062013-04-25 19:27:05 +0000[diff] [blame]348 .Case("secrel32", VK_SECREL)
Davide Italiano8667ab72015-03-04 06:49:39 +0000[diff] [blame]349 .Case("size", VK_SIZE)
Peter Collingbourne043d1a92017-01-31 18:28:44 +0000[diff] [blame]350 .Case("abs8", VK_X86_ABS8)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]351 .Case("l", VK_PPC_LO)
Ulrich Weigandd2849572013-06-21 14:42:49 +0000[diff] [blame]352 .Case("h", VK_PPC_HI)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]353 .Case("ha", VK_PPC_HA)
Sean Fertile80cb5472018-06-15 19:47:11 +0000[diff] [blame]354 .Case("high", VK_PPC_HIGH)
355 .Case("higha", VK_PPC_HIGHA)
Ulrich Weigandf7c1ee72013-06-21 14:43:42 +0000[diff] [blame]356 .Case("higher", VK_PPC_HIGHER)
Ulrich Weigandf7c1ee72013-06-21 14:43:42 +0000[diff] [blame]357 .Case("highera", VK_PPC_HIGHERA)
Ulrich Weigandf7c1ee72013-06-21 14:43:42 +0000[diff] [blame]358 .Case("highest", VK_PPC_HIGHEST)
Ulrich Weigandf7c1ee72013-06-21 14:43:42 +0000[diff] [blame]359 .Case("highesta", VK_PPC_HIGHESTA)
Ulrich Weigand5de735a2013-06-25 16:49:50 +0000[diff] [blame]360 .Case("got@l", VK_PPC_GOT_LO)
Ulrich Weigand5de735a2013-06-25 16:49:50 +0000[diff] [blame]361 .Case("got@h", VK_PPC_GOT_HI)
Ulrich Weigand5de735a2013-06-25 16:49:50 +0000[diff] [blame]362 .Case("got@ha", VK_PPC_GOT_HA)
Justin Hibbits5fa882a2014-12-17 06:23:35 +0000[diff] [blame]363 .Case("local", VK_PPC_LOCAL)
Ulrich Weigand84656592013-06-20 22:39:42 +0000[diff] [blame]364 .Case("tocbase", VK_PPC_TOCBASE)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]365 .Case("toc", VK_PPC_TOC)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]366 .Case("toc@l", VK_PPC_TOC_LO)
Ulrich Weigandf8f87dc2013-06-21 14:43:10 +0000[diff] [blame]367 .Case("toc@h", VK_PPC_TOC_HI)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]368 .Case("toc@ha", VK_PPC_TOC_HA)
Ulrich Weiganda7e5e6b2013-05-03 19:52:35 +0000[diff] [blame]369 .Case("tls", VK_PPC_TLS)
Ulrich Weigand228e0af2013-07-01 23:33:29 +0000[diff] [blame]370 .Case("dtpmod", VK_PPC_DTPMOD)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]371 .Case("tprel@l", VK_PPC_TPREL_LO)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]372 .Case("tprel@h", VK_PPC_TPREL_HI)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]373 .Case("tprel@ha", VK_PPC_TPREL_HA)
Sean Fertilea2448532018-06-15 19:47:16 +0000[diff] [blame]374 .Case("tprel@high", VK_PPC_TPREL_HIGH)
375 .Case("tprel@higha", VK_PPC_TPREL_HIGHA)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]376 .Case("tprel@higher", VK_PPC_TPREL_HIGHER)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]377 .Case("tprel@highera", VK_PPC_TPREL_HIGHERA)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]378 .Case("tprel@highest", VK_PPC_TPREL_HIGHEST)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]379 .Case("tprel@highesta", VK_PPC_TPREL_HIGHESTA)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]380 .Case("dtprel@l", VK_PPC_DTPREL_LO)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]381 .Case("dtprel@h", VK_PPC_DTPREL_HI)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]382 .Case("dtprel@ha", VK_PPC_DTPREL_HA)
Sean Fertilea2448532018-06-15 19:47:16 +0000[diff] [blame]383 .Case("dtprel@high", VK_PPC_DTPREL_HIGH)
384 .Case("dtprel@higha", VK_PPC_DTPREL_HIGHA)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]385 .Case("dtprel@higher", VK_PPC_DTPREL_HIGHER)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]386 .Case("dtprel@highera", VK_PPC_DTPREL_HIGHERA)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]387 .Case("dtprel@highest", VK_PPC_DTPREL_HIGHEST)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]388 .Case("dtprel@highesta", VK_PPC_DTPREL_HIGHESTA)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]389 .Case("got@tprel", VK_PPC_GOT_TPREL)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]390 .Case("got@tprel@l", VK_PPC_GOT_TPREL_LO)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]391 .Case("got@tprel@h", VK_PPC_GOT_TPREL_HI)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]392 .Case("got@tprel@ha", VK_PPC_GOT_TPREL_HA)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]393 .Case("got@dtprel", VK_PPC_GOT_DTPREL)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]394 .Case("got@dtprel@l", VK_PPC_GOT_DTPREL_LO)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]395 .Case("got@dtprel@h", VK_PPC_GOT_DTPREL_HI)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]396 .Case("got@dtprel@ha", VK_PPC_GOT_DTPREL_HA)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]397 .Case("got@tlsgd", VK_PPC_GOT_TLSGD)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]398 .Case("got@tlsgd@l", VK_PPC_GOT_TLSGD_LO)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]399 .Case("got@tlsgd@h", VK_PPC_GOT_TLSGD_HI)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]400 .Case("got@tlsgd@ha", VK_PPC_GOT_TLSGD_HA)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]401 .Case("got@tlsld", VK_PPC_GOT_TLSLD)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]402 .Case("got@tlsld@l", VK_PPC_GOT_TLSLD_LO)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame]403 .Case("got@tlsld@h", VK_PPC_GOT_TLSLD_HI)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]404 .Case("got@tlsld@ha", VK_PPC_GOT_TLSLD_HA)
Krzysztof Parzyszek4aba1842015-12-18 18:47:27 +0000[diff] [blame]405 .Case("gdgot", VK_Hexagon_GD_GOT)
406 .Case("gdplt", VK_Hexagon_GD_PLT)
407 .Case("iegot", VK_Hexagon_IE_GOT)
408 .Case("ie", VK_Hexagon_IE)
409 .Case("ldgot", VK_Hexagon_LD_GOT)
410 .Case("ldplt", VK_Hexagon_LD_PLT)
411 .Case("pcrel", VK_Hexagon_PCREL)
David Peixotto0fc8c682013-12-04 22:43:20 +0000[diff] [blame]412 .Case("none", VK_ARM_NONE)
Peter Collingbourne7da53572015-10-26 18:23:16 +0000[diff] [blame]413 .Case("got_prel", VK_ARM_GOT_PREL)
David Peixotto0fc8c682013-12-04 22:43:20 +0000[diff] [blame]414 .Case("target1", VK_ARM_TARGET1)
David Peixotto0fc8c682013-12-04 22:43:20 +0000[diff] [blame]415 .Case("target2", VK_ARM_TARGET2)
David Peixotto0fc8c682013-12-04 22:43:20 +0000[diff] [blame]416 .Case("prel31", VK_ARM_PREL31)
Saleem Abdulrasool5e3c87e2015-01-11 04:39:18 +0000[diff] [blame]417 .Case("sbrel", VK_ARM_SBREL)
Kai Nacke843fa742014-01-20 11:00:40 +0000[diff] [blame]418 .Case("tlsldo", VK_ARM_TLSLDO)
Dylan McKay4f045482017-12-09 08:01:28 +0000[diff] [blame]419 .Case("lo8", VK_AVR_LO8)
420 .Case("hi8", VK_AVR_HI8)
421 .Case("hlo8", VK_AVR_HLO8)
Derek Schuffa1774992018-03-20 20:06:35 +0000[diff] [blame]422 .Case("function", VK_WebAssembly_FUNCTION)
Wouter van Oortmerssen11a31132018-10-04 23:48:53 +0000[diff] [blame]423 .Case("global", VK_WebAssembly_GLOBAL)
Derek Schuffa1774992018-03-20 20:06:35 +0000[diff] [blame]424 .Case("typeindex", VK_WebAssembly_TYPEINDEX)
Heejin Ahn8bcdd042018-11-14 02:46:21 +0000[diff] [blame]425 .Case("event", VK_WebAssembly_EVENT)
Konstantin Zhuravlyov84208dd2016-10-14 04:21:32 +0000[diff] [blame]426 .Case("gotpcrel32@lo", VK_AMDGPU_GOTPCREL32_LO)
427 .Case("gotpcrel32@hi", VK_AMDGPU_GOTPCREL32_HI)
428 .Case("rel32@lo", VK_AMDGPU_REL32_LO)
429 .Case("rel32@hi", VK_AMDGPU_REL32_HI)
Konstantin Zhuravlyovdb963fc2018-06-11 21:37:57 +0000[diff] [blame]430 .Case("rel64", VK_AMDGPU_REL64)
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]431 .Default(VK_Invalid);
432}
433
Benjamin Kramerb1bba1a2014-10-11 17:57:27 +0000[diff] [blame]434void MCSymbolRefExpr::printVariantKind(raw_ostream &OS) const {
435 if (UseParensForSymbolVariant)
436 OS << '(' << MCSymbolRefExpr::getVariantKindName(getKind()) << ')';
437 else
438 OS << '@' << MCSymbolRefExpr::getVariantKindName(getKind());
439}
440
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]441/* *** */
442
Craig Topper4bb51cc2012-09-26 06:36:36 +0000[diff] [blame]443void MCTargetExpr::anchor() {}
Chris Lattner4f3e7aa2009-09-16 01:26:31 +0000[diff] [blame]444
Daniel Dunbar9643ac52009-08-31 08:07:22 +0000[diff] [blame]445/* *** */
446
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]447bool MCExpr::evaluateAsAbsolute(int64_t &Res) const {
448 return evaluateAsAbsolute(Res, nullptr, nullptr, nullptr);
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]449}
450
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]451bool MCExpr::evaluateAsAbsolute(int64_t &Res,
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]452 const MCAsmLayout &Layout) const {
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]453 return evaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, nullptr);
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]454}
455
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]456bool MCExpr::evaluateAsAbsolute(int64_t &Res,
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]457 const MCAsmLayout &Layout,
458 const SectionAddrMap &Addrs) const {
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]459 return evaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, &Addrs);
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]460}
461
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]462bool MCExpr::evaluateAsAbsolute(int64_t &Res, const MCAssembler &Asm) const {
463 return evaluateAsAbsolute(Res, &Asm, nullptr, nullptr);
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]464}
465
Nirav Dave4d344622018-04-30 19:22:40 +0000[diff] [blame]466bool MCExpr::evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm) const {
467 return evaluateAsAbsolute(Res, Asm, nullptr, nullptr);
468}
469
Rafael Espindola49dba992015-03-25 00:25:37 +0000[diff] [blame]470bool MCExpr::evaluateKnownAbsolute(int64_t &Res,
471 const MCAsmLayout &Layout) const {
472 return evaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, nullptr,
473 true);
Rafael Espindola216fdfe2014-08-15 14:20:32 +0000[diff] [blame]474}
475
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]476bool MCExpr::evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]477 const MCAsmLayout *Layout,
Rafael Espindola85f2ecc2010-12-07 00:27:36 +0000[diff] [blame]478 const SectionAddrMap *Addrs) const {
Rafael Espindola216fdfe2014-08-15 14:20:32 +0000[diff] [blame]479 // FIXME: The use if InSet = Addrs is a hack. Setting InSet causes us
480 // absolutize differences across sections and that is what the MachO writer
481 // uses Addrs for.
482 return evaluateAsAbsolute(Res, Asm, Layout, Addrs, Addrs);
483}
484
485bool MCExpr::evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
486 const MCAsmLayout *Layout,
487 const SectionAddrMap *Addrs, bool InSet) const {
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]488 MCValue Value;
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]489
Daniel Dunbaref6e96f2010-03-23 23:47:07 +0000[diff] [blame]490 // Fast path constants.
491 if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(this)) {
492 Res = CE->getValue();
493 return true;
494 }
495
Rafael Espindolad033c4b2015-03-25 13:16:53 +0000[diff] [blame]496 bool IsRelocatable =
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]497 evaluateAsRelocatableImpl(Value, Asm, Layout, nullptr, Addrs, InSet);
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]498
Rafael Espindola10b6d332010-12-22 22:16:24 +0000[diff] [blame]499 // Record the current value.
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]500 Res = Value.getConstant();
Rafael Espindola10b6d332010-12-22 22:16:24 +0000[diff] [blame]501
502 return IsRelocatable && Value.isAbsolute();
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]503}
504
Adrian Prantl26b584c2018-05-01 15:54:18 +0000[diff] [blame]505/// Helper method for \see EvaluateSymbolAdd().
Rafael Espindola55f6e3b2015-03-25 19:24:39 +0000[diff] [blame]506static void AttemptToFoldSymbolOffsetDifference(
507 const MCAssembler *Asm, const MCAsmLayout *Layout,
508 const SectionAddrMap *Addrs, bool InSet, const MCSymbolRefExpr *&A,
509 const MCSymbolRefExpr *&B, int64_t &Addend) {
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]510 if (!A || !B)
511 return;
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]512
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]513 const MCSymbol &SA = A->getSymbol();
514 const MCSymbol &SB = B->getSymbol();
515
516 if (SA.isUndefined() || SB.isUndefined())
517 return;
518
Jim Grosbachbc812862015-06-04 22:24:41 +0000[diff] [blame]519 if (!Asm->getWriter().isSymbolRefDifferenceFullyResolved(*Asm, A, B, InSet))
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]520 return;
521
Rafael Espindola0eba49c2015-10-05 12:07:05 +0000[diff] [blame]522 if (SA.getFragment() == SB.getFragment() && !SA.isVariable() &&
Nirav Dave4d344622018-04-30 19:22:40 +0000[diff] [blame]523 !SA.isUnset() && !SB.isVariable() && !SB.isUnset()) {
Rafael Espindola82fdcc02015-05-29 17:48:04 +0000[diff] [blame]524 Addend += (SA.getOffset() - SB.getOffset());
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]525
Owen Andersonce3a1ba2011-03-21 23:13:43 +0000[diff] [blame]526 // Pointers to Thumb symbols need to have their low-bit set to allow
527 // for interworking.
528 if (Asm->isThumbFunc(&SA))
529 Addend |= 1;
530
Aleksandar Beserminjie3a3e262018-10-16 08:27:28 +0000[diff] [blame]531 // If symbol is labeled as micromips, we set low-bit to ensure
532 // correct offset in .gcc_except_table
533 if (Asm->getBackend().isMicroMips(&SA))
534 Addend |= 1;
535
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]536 // Clear the symbol expr pointers to indicate we have folded these
537 // operands.
Craig Topper4266ae82014-04-13 04:57:38 +0000[diff] [blame]538 A = B = nullptr;
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]539 return;
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]540 }
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]541
542 if (!Layout)
543 return;
544
Rafael Espindolacfac75a2015-05-29 21:45:01 +0000[diff] [blame]545 const MCSection &SecA = *SA.getFragment()->getParent();
546 const MCSection &SecB = *SB.getFragment()->getParent();
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]547
548 if ((&SecA != &SecB) && !Addrs)
549 return;
550
551 // Eagerly evaluate.
Duncan P. N. Exon Smithe1fce862015-05-19 23:53:20 +0000[diff] [blame]552 Addend += Layout->getSymbolOffset(A->getSymbol()) -
553 Layout->getSymbolOffset(B->getSymbol());
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]554 if (Addrs && (&SecA != &SecB))
Rafael Espindola504473e2015-05-26 00:52:18 +0000[diff] [blame]555 Addend += (Addrs->lookup(&SecA) - Addrs->lookup(&SecB));
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]556
Jim Grosbach0db12412012-02-24 05:12:18 +0000[diff] [blame]557 // Pointers to Thumb symbols need to have their low-bit set to allow
558 // for interworking.
559 if (Asm->isThumbFunc(&SA))
560 Addend |= 1;
561
Hans Wennborgeaad8e92019-02-12 11:05:22 +0000[diff] [blame]562 // If symbol is labeled as micromips, we set low-bit to ensure
563 // correct offset in .gcc_except_table
564 if (Asm->getBackend().isMicroMips(&SA))
565 Addend |= 1;
566
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]567 // Clear the symbol expr pointers to indicate we have folded these
568 // operands.
Craig Topper4266ae82014-04-13 04:57:38 +0000[diff] [blame]569 A = B = nullptr;
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]570}
571
Adrian Prantl26b584c2018-05-01 15:54:18 +0000[diff] [blame]572/// Evaluate the result of an add between (conceptually) two MCValues.
Daniel Dunbardd18e282010-12-16 18:36:25 +0000[diff] [blame]573///
574/// This routine conceptually attempts to construct an MCValue:
575/// Result = (Result_A - Result_B + Result_Cst)
576/// from two MCValue's LHS and RHS where
577/// Result = LHS + RHS
578/// and
579/// Result = (LHS_A - LHS_B + LHS_Cst) + (RHS_A - RHS_B + RHS_Cst).
580///
581/// This routine attempts to aggresively fold the operands such that the result
582/// is representable in an MCValue, but may not always succeed.
583///
584/// \returns True on success, false if the result is not representable in an
585/// MCValue.
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]586
587/// NOTE: It is really important to have both the Asm and Layout arguments.
588/// They might look redundant, but this function can be used before layout
589/// is done (see the object streamer for example) and having the Asm argument
Rafael Espindolaf705a7e2010-12-18 04:01:45 +0000[diff] [blame]590/// lets us avoid relaxations early.
Rafael Espindola55f6e3b2015-03-25 19:24:39 +0000[diff] [blame]591static bool
592EvaluateSymbolicAdd(const MCAssembler *Asm, const MCAsmLayout *Layout,
593 const SectionAddrMap *Addrs, bool InSet, const MCValue &LHS,
594 const MCSymbolRefExpr *RHS_A, const MCSymbolRefExpr *RHS_B,
595 int64_t RHS_Cst, MCValue &Res) {
Daniel Dunbarf2ed62d2010-12-17 01:07:20 +0000[diff] [blame]596 // FIXME: This routine (and other evaluation parts) are *incredibly* sloppy
597 // about dealing with modifiers. This will ultimately bite us, one day.
598 const MCSymbolRefExpr *LHS_A = LHS.getSymA();
599 const MCSymbolRefExpr *LHS_B = LHS.getSymB();
600 int64_t LHS_Cst = LHS.getConstant();
601
602 // Fold the result constant immediately.
603 int64_t Result_Cst = LHS_Cst + RHS_Cst;
604
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]605 assert((!Layout || Asm) &&
606 "Must have an assembler object if layout is given!");
607
Alex Bradburye54d5392018-05-23 12:36:18 +0000[diff] [blame]608 // If we have a layout, we can fold resolved differences. Do not do this if
609 // the backend requires this to be emitted as individual relocations, unless
610 // the InSet flag is set to get the current difference anyway (used for
611 // example to calculate symbol sizes).
612 if (Asm &&
613 (InSet || !Asm->getBackend().requiresDiffExpressionRelocations())) {
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]614 // First, fold out any differences which are fully resolved. By
615 // reassociating terms in
616 // Result = (LHS_A - LHS_B + LHS_Cst) + (RHS_A - RHS_B + RHS_Cst).
617 // we have the four possible differences:
618 // (LHS_A - LHS_B),
619 // (LHS_A - RHS_B),
620 // (RHS_A - LHS_B),
621 // (RHS_A - RHS_B).
Chris Lattner7a2bdde2011-04-15 05:18:47 +0000[diff] [blame]622 // Since we are attempting to be as aggressive as possible about folding, we
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]623 // attempt to evaluate each possible alternative.
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]624 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, LHS_A, LHS_B,
625 Result_Cst);
626 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, LHS_A, RHS_B,
627 Result_Cst);
628 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, RHS_A, LHS_B,
629 Result_Cst);
630 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, RHS_A, RHS_B,
631 Result_Cst);
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]632 }
633
Daniel Dunbarf2ed62d2010-12-17 01:07:20 +0000[diff] [blame]634 // We can't represent the addition or subtraction of two symbols.
635 if ((LHS_A && RHS_A) || (LHS_B && RHS_B))
Daniel Dunbar35976042009-06-30 02:08:27 +0000[diff] [blame]636 return false;
637
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]638 // At this point, we have at most one additive symbol and one subtractive
639 // symbol -- find them.
Daniel Dunbarf2ed62d2010-12-17 01:07:20 +0000[diff] [blame]640 const MCSymbolRefExpr *A = LHS_A ? LHS_A : RHS_A;
641 const MCSymbolRefExpr *B = LHS_B ? LHS_B : RHS_B;
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]642
Daniel Dunbarf2ed62d2010-12-17 01:07:20 +0000[diff] [blame]643 Res = MCValue::get(A, B, Result_Cst);
Daniel Dunbar35976042009-06-30 02:08:27 +0000[diff] [blame]644 return true;
645}
646
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]647bool MCExpr::evaluateAsRelocatable(MCValue &Res,
Joerg Sonnenbergerb2b36342014-08-10 11:35:12 +0000[diff] [blame]648 const MCAsmLayout *Layout,
Joerg Sonnenberger901a1b82014-08-10 11:37:07 +0000[diff] [blame]649 const MCFixup *Fixup) const {
Craig Topper4266ae82014-04-13 04:57:38 +0000[diff] [blame]650 MCAssembler *Assembler = Layout ? &Layout->getAssembler() : nullptr;
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]651 return evaluateAsRelocatableImpl(Res, Assembler, Layout, Fixup, nullptr,
Rafael Espindolad033c4b2015-03-25 13:16:53 +0000[diff] [blame]652 false);
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]653}
654
Rafael Espindola9d2f0da2015-03-26 21:11:00 +0000[diff] [blame]655bool MCExpr::evaluateAsValue(MCValue &Res, const MCAsmLayout &Layout) const {
656 MCAssembler *Assembler = &Layout.getAssembler();
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]657 return evaluateAsRelocatableImpl(Res, Assembler, &Layout, nullptr, nullptr,
Rafael Espindola9d2f0da2015-03-26 21:11:00 +0000[diff] [blame]658 true);
659}
660
Rafael Espindola0eba49c2015-10-05 12:07:05 +0000[diff] [blame]661static bool canExpand(const MCSymbol &Sym, bool InSet) {
Rafael Espindola5eb74812015-06-03 21:52:06 +0000[diff] [blame]662 const MCExpr *Expr = Sym.getVariableValue();
663 const auto *Inner = dyn_cast<MCSymbolRefExpr>(Expr);
664 if (Inner) {
665 if (Inner->getKind() == MCSymbolRefExpr::VK_WEAKREF)
666 return false;
667 }
668
Rafael Espindola9d2f0da2015-03-26 21:11:00 +0000[diff] [blame]669 if (InSet)
670 return true;
Rafael Espindola0eba49c2015-10-05 12:07:05 +0000[diff] [blame]671 return !Sym.isInSection();
Rafael Espindola1c509552014-04-28 20:53:11 +0000[diff] [blame]672}
673
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]674bool MCExpr::evaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm,
Rafael Espindolaf230df92010-10-16 18:23:53 +0000[diff] [blame]675 const MCAsmLayout *Layout,
Joerg Sonnenbergerb2b36342014-08-10 11:35:12 +0000[diff] [blame]676 const MCFixup *Fixup,
Rafael Espindolad033c4b2015-03-25 13:16:53 +0000[diff] [blame]677 const SectionAddrMap *Addrs,
678 bool InSet) const {
Daniel Dunbarff547842010-03-23 23:47:14 +0000[diff] [blame]679 ++stats::MCExprEvaluate;
680
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]681 switch (getKind()) {
Chris Lattner5d917a82010-02-08 19:41:07 +0000[diff] [blame]682 case Target:
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]683 return cast<MCTargetExpr>(this)->evaluateAsRelocatableImpl(Res, Layout,
Joerg Sonnenbergerb2b36342014-08-10 11:35:12 +0000[diff] [blame]684 Fixup);
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]685
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]686 case Constant:
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]687 Res = MCValue::get(cast<MCConstantExpr>(this)->getValue());
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]688 return true;
689
690 case SymbolRef: {
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]691 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
692 const MCSymbol &Sym = SRE->getSymbol();
Daniel Dunbar7c3600d2009-10-16 01:33:57 +0000[diff] [blame]693
694 // Evaluate recursively if this is a variable.
Rafael Espindolad033c4b2015-03-25 13:16:53 +0000[diff] [blame]695 if (Sym.isVariable() && SRE->getKind() == MCSymbolRefExpr::VK_None &&
Rafael Espindola0eba49c2015-10-05 12:07:05 +0000[diff] [blame]696 canExpand(Sym, InSet)) {
Rafael Espindola9d2f0da2015-03-26 21:11:00 +0000[diff] [blame]697 bool IsMachO = SRE->hasSubsectionsViaSymbols();
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]698 if (Sym.getVariableValue()->evaluateAsRelocatableImpl(
Rafael Espindola9d2f0da2015-03-26 21:11:00 +0000[diff] [blame]699 Res, Asm, Layout, Fixup, Addrs, InSet || IsMachO)) {
700 if (!IsMachO)
Rafael Espindolad033c4b2015-03-25 13:16:53 +0000[diff] [blame]701 return true;
702
Rafael Espindola0a70f9b2014-03-20 02:12:01 +0000[diff] [blame]703 const MCSymbolRefExpr *A = Res.getSymA();
704 const MCSymbolRefExpr *B = Res.getSymB();
Rafael Espindolad033c4b2015-03-25 13:16:53 +0000[diff] [blame]705 // FIXME: This is small hack. Given
706 // a = b + 4
707 // .long a
708 // the OS X assembler will completely drop the 4. We should probably
709 // include it in the relocation or produce an error if that is not
710 // possible.
Evgeniy Stepanov8efab372017-06-08 20:49:03 +0000[diff] [blame]711 // Allow constant expressions.
Rafael Espindolad033c4b2015-03-25 13:16:53 +0000[diff] [blame]712 if (!A && !B)
713 return true;
Evgeniy Stepanov8efab372017-06-08 20:49:03 +0000[diff] [blame]714 // Allows aliases with zero offset.
715 if (Res.getConstant() == 0 && (!A || !B))
716 return true;
Rafael Espindola0a70f9b2014-03-20 02:12:01 +0000[diff] [blame]717 }
Rafael Espindola94ed5fc2010-11-15 16:33:49 +0000[diff] [blame]718 }
Daniel Dunbar7c3600d2009-10-16 01:33:57 +0000[diff] [blame]719
Craig Topper4266ae82014-04-13 04:57:38 +0000[diff] [blame]720 Res = MCValue::get(SRE, nullptr, 0);
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]721 return true;
722 }
723
724 case Unary: {
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]725 const MCUnaryExpr *AUE = cast<MCUnaryExpr>(this);
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]726 MCValue Value;
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]727
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]728 if (!AUE->getSubExpr()->evaluateAsRelocatableImpl(Value, Asm, Layout, Fixup,
Rafael Espindolad033c4b2015-03-25 13:16:53 +0000[diff] [blame]729 Addrs, InSet))
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]730 return false;
731
732 switch (AUE->getOpcode()) {
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]733 case MCUnaryExpr::LNot:
Daniel Dunbar80f62d02009-07-01 06:48:00 +0000[diff] [blame]734 if (!Value.isAbsolute())
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]735 return false;
736 Res = MCValue::get(!Value.getConstant());
737 break;
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]738 case MCUnaryExpr::Minus:
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]739 /// -(a - b + const) ==> (b - a - const)
Daniel Dunbarb27a41b2009-08-11 17:47:52 +0000[diff] [blame]740 if (Value.getSymA() && !Value.getSymB())
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]741 return false;
Sanjay Patel760078b2016-05-20 14:09:41 +0000[diff] [blame]742
743 // The cast avoids undefined behavior if the constant is INT64_MIN.
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]744 Res = MCValue::get(Value.getSymB(), Value.getSymA(),
Sanjay Patel760078b2016-05-20 14:09:41 +0000[diff] [blame]745 -(uint64_t)Value.getConstant());
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]746 break;
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]747 case MCUnaryExpr::Not:
Daniel Dunbar80f62d02009-07-01 06:48:00 +0000[diff] [blame]748 if (!Value.isAbsolute())
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]749 return false;
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]750 Res = MCValue::get(~Value.getConstant());
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]751 break;
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]752 case MCUnaryExpr::Plus:
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]753 Res = Value;
754 break;
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]755 }
756
757 return true;
758 }
759
760 case Binary: {
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]761 const MCBinaryExpr *ABE = cast<MCBinaryExpr>(this);
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]762 MCValue LHSValue, RHSValue;
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]763
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]764 if (!ABE->getLHS()->evaluateAsRelocatableImpl(LHSValue, Asm, Layout, Fixup,
Rafael Espindolad033c4b2015-03-25 13:16:53 +0000[diff] [blame]765 Addrs, InSet) ||
Jim Grosbach586c0042015-05-30 01:25:56 +0000[diff] [blame]766 !ABE->getRHS()->evaluateAsRelocatableImpl(RHSValue, Asm, Layout, Fixup,
Nirav Davefd8c4122018-08-16 16:31:14 +0000[diff] [blame]767 Addrs, InSet)) {
768 // Check if both are Target Expressions, see if we can compare them.
769 if (const MCTargetExpr *L = dyn_cast<MCTargetExpr>(ABE->getLHS()))
770 if (const MCTargetExpr *R = cast<MCTargetExpr>(ABE->getRHS())) {
771 switch (ABE->getOpcode()) {
772 case MCBinaryExpr::EQ:
773 Res = MCValue::get((L->isEqualTo(R)) ? -1 : 0);
774 return true;
775 case MCBinaryExpr::NE:
776 Res = MCValue::get((R->isEqualTo(R)) ? 0 : -1);
777 return true;
Nirav Davecd2d2cf2018-08-16 17:22:31 +0000[diff] [blame]778 default: break;
Nirav Davefd8c4122018-08-16 16:31:14 +0000[diff] [blame]779 }
780 }
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]781 return false;
Nirav Davefd8c4122018-08-16 16:31:14 +0000[diff] [blame]782 }
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]783
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]784 // We only support a few operations on non-constant expressions, handle
785 // those first.
Daniel Dunbar80f62d02009-07-01 06:48:00 +0000[diff] [blame]786 if (!LHSValue.isAbsolute() || !RHSValue.isAbsolute()) {
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]787 switch (ABE->getOpcode()) {
788 default:
789 return false;
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]790 case MCBinaryExpr::Sub:
Daniel Dunbar35976042009-06-30 02:08:27 +0000[diff] [blame]791 // Negate RHS and add.
Sanjay Patel760078b2016-05-20 14:09:41 +0000[diff] [blame]792 // The cast avoids undefined behavior if the constant is INT64_MIN.
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]793 return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
Daniel Dunbar35976042009-06-30 02:08:27 +0000[diff] [blame]794 RHSValue.getSymB(), RHSValue.getSymA(),
Sanjay Patel760078b2016-05-20 14:09:41 +0000[diff] [blame]795 -(uint64_t)RHSValue.getConstant(), Res);
Daniel Dunbar35976042009-06-30 02:08:27 +0000[diff] [blame]796
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]797 case MCBinaryExpr::Add:
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]798 return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
Daniel Dunbar35976042009-06-30 02:08:27 +0000[diff] [blame]799 RHSValue.getSymA(), RHSValue.getSymB(),
Rafael Espindola55f6e3b2015-03-25 19:24:39 +0000[diff] [blame]800 RHSValue.getConstant(), Res);
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]801 }
802 }
803
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]804 // FIXME: We need target hooks for the evaluation. It may be limited in
Ahmed Bougachadac39b12015-04-28 00:21:32 +0000[diff] [blame]805 // width, and gas defines the result of comparisons differently from
806 // Apple as.
Daniel Dunbarb79742c2009-06-30 16:02:47 +0000[diff] [blame]807 int64_t LHS = LHSValue.getConstant(), RHS = RHSValue.getConstant();
808 int64_t Result = 0;
Bill Wendling558d7242018-05-14 05:25:36 +0000[diff] [blame]809 auto Op = ABE->getOpcode();
810 switch (Op) {
Ahmed Bougachadac39b12015-04-28 00:21:32 +0000[diff] [blame]811 case MCBinaryExpr::AShr: Result = LHS >> RHS; break;
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]812 case MCBinaryExpr::Add: Result = LHS + RHS; break;
813 case MCBinaryExpr::And: Result = LHS & RHS; break;
Davide Italiano830d0f82015-09-11 22:04:21 +0000[diff] [blame]814 case MCBinaryExpr::Div:
Simon Pilgrim0bbd02e2018-02-22 18:06:48 +0000[diff] [blame]815 case MCBinaryExpr::Mod:
Davide Italiano125be702015-09-11 20:47:35 +0000[diff] [blame]816 // Handle division by zero. gas just emits a warning and keeps going,
817 // we try to be stricter.
818 // FIXME: Currently the caller of this function has no way to understand
819 // we're bailing out because of 'division by zero'. Therefore, it will
820 // emit a 'expected relocatable expression' error. It would be nice to
821 // change this code to emit a better diagnostic.
822 if (RHS == 0)
823 return false;
Simon Pilgrim0bbd02e2018-02-22 18:06:48 +0000[diff] [blame]824 if (ABE->getOpcode() == MCBinaryExpr::Div)
825 Result = LHS / RHS;
826 else
827 Result = LHS % RHS;
Davide Italiano830d0f82015-09-11 22:04:21 +0000[diff] [blame]828 break;
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]829 case MCBinaryExpr::EQ: Result = LHS == RHS; break;
830 case MCBinaryExpr::GT: Result = LHS > RHS; break;
831 case MCBinaryExpr::GTE: Result = LHS >= RHS; break;
832 case MCBinaryExpr::LAnd: Result = LHS && RHS; break;
833 case MCBinaryExpr::LOr: Result = LHS || RHS; break;
Ahmed Bougachadac39b12015-04-28 00:21:32 +0000[diff] [blame]834 case MCBinaryExpr::LShr: Result = uint64_t(LHS) >> uint64_t(RHS); break;
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]835 case MCBinaryExpr::LT: Result = LHS < RHS; break;
836 case MCBinaryExpr::LTE: Result = LHS <= RHS; break;
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]837 case MCBinaryExpr::Mul: Result = LHS * RHS; break;
838 case MCBinaryExpr::NE: Result = LHS != RHS; break;
839 case MCBinaryExpr::Or: Result = LHS | RHS; break;
Justin Bogner1e4a7e02015-06-23 07:32:55 +0000[diff] [blame]840 case MCBinaryExpr::Shl: Result = uint64_t(LHS) << uint64_t(RHS); break;
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]841 case MCBinaryExpr::Sub: Result = LHS - RHS; break;
842 case MCBinaryExpr::Xor: Result = LHS ^ RHS; break;
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]843 }
844
Bill Wendling558d7242018-05-14 05:25:36 +0000[diff] [blame]845 switch (Op) {
846 default:
847 Res = MCValue::get(Result);
848 break;
849 case MCBinaryExpr::EQ:
850 case MCBinaryExpr::GT:
851 case MCBinaryExpr::GTE:
852 case MCBinaryExpr::LT:
853 case MCBinaryExpr::LTE:
854 case MCBinaryExpr::NE:
855 // A comparison operator returns a -1 if true and 0 if false.
856 Res = MCValue::get(Result ? -1 : 0);
857 break;
858 }
859
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]860 return true;
861 }
862 }
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]863
Craig Topper85814382012-02-07 05:05:23 +0000[diff] [blame]864 llvm_unreachable("Invalid assembly expression kind!");
Daniel Dunbar9643ac52009-08-31 08:07:22 +0000[diff] [blame]865}
Daniel Dunbar0eab5c42011-04-29 18:00:03 +0000[diff] [blame]866
Rafael Espindola0eba49c2015-10-05 12:07:05 +0000[diff] [blame]867MCFragment *MCExpr::findAssociatedFragment() const {
Daniel Dunbar0eab5c42011-04-29 18:00:03 +0000[diff] [blame]868 switch (getKind()) {
869 case Target:
870 // We never look through target specific expressions.
Rafael Espindola0eba49c2015-10-05 12:07:05 +0000[diff] [blame]871 return cast<MCTargetExpr>(this)->findAssociatedFragment();
Daniel Dunbar0eab5c42011-04-29 18:00:03 +0000[diff] [blame]872
873 case Constant:
Rafael Espindola0eba49c2015-10-05 12:07:05 +0000[diff] [blame]874 return MCSymbol::AbsolutePseudoFragment;
Daniel Dunbar0eab5c42011-04-29 18:00:03 +0000[diff] [blame]875
876 case SymbolRef: {
877 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
878 const MCSymbol &Sym = SRE->getSymbol();
Rafael Espindola0eba49c2015-10-05 12:07:05 +0000[diff] [blame]879 return Sym.getFragment();
Daniel Dunbar0eab5c42011-04-29 18:00:03 +0000[diff] [blame]880 }
881
882 case Unary:
Rafael Espindola0eba49c2015-10-05 12:07:05 +0000[diff] [blame]883 return cast<MCUnaryExpr>(this)->getSubExpr()->findAssociatedFragment();
Daniel Dunbar0eab5c42011-04-29 18:00:03 +0000[diff] [blame]884
885 case Binary: {
886 const MCBinaryExpr *BE = cast<MCBinaryExpr>(this);
Rafael Espindola0eba49c2015-10-05 12:07:05 +0000[diff] [blame]887 MCFragment *LHS_F = BE->getLHS()->findAssociatedFragment();
888 MCFragment *RHS_F = BE->getRHS()->findAssociatedFragment();
Daniel Dunbar0eab5c42011-04-29 18:00:03 +0000[diff] [blame]889
Rafael Espindola0eba49c2015-10-05 12:07:05 +0000[diff] [blame]890 // If either is absolute, return the other.
891 if (LHS_F == MCSymbol::AbsolutePseudoFragment)
892 return RHS_F;
893 if (RHS_F == MCSymbol::AbsolutePseudoFragment)
894 return LHS_F;
Daniel Dunbar0eab5c42011-04-29 18:00:03 +0000[diff] [blame]895
Peter Collingbournec39f5dd2015-04-03 01:46:11 +0000[diff] [blame]896 // Not always correct, but probably the best we can do without more context.
897 if (BE->getOpcode() == MCBinaryExpr::Sub)
Rafael Espindola0eba49c2015-10-05 12:07:05 +0000[diff] [blame]898 return MCSymbol::AbsolutePseudoFragment;
Peter Collingbournec39f5dd2015-04-03 01:46:11 +0000[diff] [blame]899
Rafael Espindola0eba49c2015-10-05 12:07:05 +0000[diff] [blame]900 // Otherwise, return the first non-null fragment.
901 return LHS_F ? LHS_F : RHS_F;
Daniel Dunbar0eab5c42011-04-29 18:00:03 +0000[diff] [blame]902 }
903 }
904
Craig Topper85814382012-02-07 05:05:23 +0000[diff] [blame]905 llvm_unreachable("Invalid assembly expression kind!");
Daniel Dunbar0eab5c42011-04-29 18:00:03 +0000[diff] [blame]906}