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gerrit-public.fairphone.software / toolchain / llvm-project / f11efe7f48ed47144c2c1f998c01a997803345cb / . / llvm / lib / MC / MCExpr.cpp
blob: c777e648bdc6d1ca25024cdb75c31fa23063677f [file] [log] [blame]
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]1//===- MCExpr.cpp - Assembly Level Expression Implementation --------------===//
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
Daniel Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]10#define DEBUG_TYPE "mcexpr"
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]11#include "llvm/MC/MCExpr.h"
Daniel Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]12#include "llvm/ADT/Statistic.h"
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]13#include "llvm/ADT/StringSwitch.h"
Daniel Dunbar5c5228a2010-03-11 05:53:37 +0000[diff] [blame]14#include "llvm/MC/MCAsmLayout.h"
15#include "llvm/MC/MCAssembler.h"
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]16#include "llvm/MC/MCContext.h"
Craig Topper6e80c282012-03-26 06:58:25 +0000[diff] [blame]17#include "llvm/MC/MCObjectWriter.h"
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]18#include "llvm/MC/MCSymbol.h"
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]19#include "llvm/MC/MCValue.h"
David Greenea8cbfb82010-01-05 01:28:07 +0000[diff] [blame]20#include "llvm/Support/Debug.h"
Chandler Carruthf3e85022012-01-10 18:08:01 +0000[diff] [blame]21#include "llvm/Support/ErrorHandling.h"
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]22#include "llvm/Support/raw_ostream.h"
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]23using namespace llvm;
24
Daniel Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]25namespace {
26namespace stats {
27STATISTIC(MCExprEvaluate, "Number of MCExpr evaluations");
28}
29}
30
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]31void MCExpr::print(raw_ostream &OS) const {
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]32 switch (getKind()) {
Chris Lattner38d022e2010-02-08 19:41:07 +0000[diff] [blame]33 case MCExpr::Target:
34 return cast<MCTargetExpr>(this)->PrintImpl(OS);
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]35 case MCExpr::Constant:
36 OS << cast<MCConstantExpr>(*this).getValue();
37 return;
38
Chris Lattner22833a32009-09-08 23:20:50 +0000[diff] [blame]39 case MCExpr::SymbolRef: {
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]40 const MCSymbolRefExpr &SRE = cast<MCSymbolRefExpr>(*this);
41 const MCSymbol &Sym = SRE.getSymbol();
Chris Lattneredb9d842010-11-15 02:46:57 +0000[diff] [blame]42 // Parenthesize names that start with $ so that they don't look like
43 // absolute names.
44 bool UseParens = Sym.getName()[0] == '$';
Chris Lattneredb9d842010-11-15 02:46:57 +0000[diff] [blame]45 if (UseParens)
Chris Lattner8b5d55e2010-01-17 21:43:43 +0000[diff] [blame]46 OS << '(' << Sym << ')';
47 else
48 OS << Sym;
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]49
Logan Chien4dd14fb2012-12-12 07:14:46 +0000[diff] [blame]50 if (SRE.getKind() == MCSymbolRefExpr::VK_ARM_NONE ||
51 SRE.getKind() == MCSymbolRefExpr::VK_ARM_PLT ||
Jim Grosbachf23b2d92010-11-10 03:26:07 +0000[diff] [blame]52 SRE.getKind() == MCSymbolRefExpr::VK_ARM_TLSGD ||
53 SRE.getKind() == MCSymbolRefExpr::VK_ARM_GOT ||
54 SRE.getKind() == MCSymbolRefExpr::VK_ARM_GOTOFF ||
55 SRE.getKind() == MCSymbolRefExpr::VK_ARM_TPOFF ||
James Molloy6685c082012-01-26 09:25:43 +0000[diff] [blame]56 SRE.getKind() == MCSymbolRefExpr::VK_ARM_GOTTPOFF ||
Anton Korobeynikova305ea52012-11-09 20:20:12 +0000[diff] [blame]57 SRE.getKind() == MCSymbolRefExpr::VK_ARM_TARGET1 ||
Logan Chien4dd14fb2012-12-12 07:14:46 +0000[diff] [blame]58 SRE.getKind() == MCSymbolRefExpr::VK_ARM_TARGET2 ||
59 SRE.getKind() == MCSymbolRefExpr::VK_ARM_PREL31)
Jim Grosbach85dcd3d2010-09-22 23:27:36 +0000[diff] [blame]60 OS << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
Ulrich Weigand41789de2013-05-23 22:26:41 +0000[diff] [blame]61 else if (SRE.getKind() != MCSymbolRefExpr::VK_None)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]62 OS << '@' << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
63
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]64 return;
Chris Lattner22833a32009-09-08 23:20:50 +0000[diff] [blame]65 }
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]66
67 case MCExpr::Unary: {
68 const MCUnaryExpr &UE = cast<MCUnaryExpr>(*this);
69 switch (UE.getOpcode()) {
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]70 case MCUnaryExpr::LNot: OS << '!'; break;
71 case MCUnaryExpr::Minus: OS << '-'; break;
72 case MCUnaryExpr::Not: OS << '~'; break;
73 case MCUnaryExpr::Plus: OS << '+'; break;
74 }
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]75 OS << *UE.getSubExpr();
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]76 return;
77 }
78
79 case MCExpr::Binary: {
80 const MCBinaryExpr &BE = cast<MCBinaryExpr>(*this);
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]81
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]82 // Only print parens around the LHS if it is non-trivial.
83 if (isa<MCConstantExpr>(BE.getLHS()) || isa<MCSymbolRefExpr>(BE.getLHS())) {
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]84 OS << *BE.getLHS();
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]85 } else {
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]86 OS << '(' << *BE.getLHS() << ')';
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]87 }
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]88
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]89 switch (BE.getOpcode()) {
Chris Lattner7975b8f2009-09-08 06:37:35 +0000[diff] [blame]90 case MCBinaryExpr::Add:
91 // Print "X-42" instead of "X+-42".
92 if (const MCConstantExpr *RHSC = dyn_cast<MCConstantExpr>(BE.getRHS())) {
93 if (RHSC->getValue() < 0) {
94 OS << RHSC->getValue();
95 return;
96 }
97 }
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]98
Chris Lattner7975b8f2009-09-08 06:37:35 +0000[diff] [blame]99 OS << '+';
100 break;
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]101 case MCBinaryExpr::And: OS << '&'; break;
102 case MCBinaryExpr::Div: OS << '/'; break;
103 case MCBinaryExpr::EQ: OS << "=="; break;
104 case MCBinaryExpr::GT: OS << '>'; break;
105 case MCBinaryExpr::GTE: OS << ">="; break;
106 case MCBinaryExpr::LAnd: OS << "&&"; break;
107 case MCBinaryExpr::LOr: OS << "||"; break;
108 case MCBinaryExpr::LT: OS << '<'; break;
109 case MCBinaryExpr::LTE: OS << "<="; break;
110 case MCBinaryExpr::Mod: OS << '%'; break;
111 case MCBinaryExpr::Mul: OS << '*'; break;
112 case MCBinaryExpr::NE: OS << "!="; break;
113 case MCBinaryExpr::Or: OS << '|'; break;
114 case MCBinaryExpr::Shl: OS << "<<"; break;
115 case MCBinaryExpr::Shr: OS << ">>"; break;
116 case MCBinaryExpr::Sub: OS << '-'; break;
117 case MCBinaryExpr::Xor: OS << '^'; break;
118 }
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]119
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]120 // Only print parens around the LHS if it is non-trivial.
121 if (isa<MCConstantExpr>(BE.getRHS()) || isa<MCSymbolRefExpr>(BE.getRHS())) {
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]122 OS << *BE.getRHS();
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]123 } else {
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]124 OS << '(' << *BE.getRHS() << ')';
Chris Lattner3cfc5512009-09-08 06:34:07 +0000[diff] [blame]125 }
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]126 return;
127 }
128 }
129
Craig Toppera2886c22012-02-07 05:05:23 +0000[diff] [blame]130 llvm_unreachable("Invalid expression kind!");
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]131}
132
Manman Ren49d684e2012-09-12 05:06:18 +0000[diff] [blame]133#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]134void MCExpr::dump() const {
Chris Lattnerc8f77172010-01-18 00:37:40 +0000[diff] [blame]135 print(dbgs());
David Greenea8cbfb82010-01-05 01:28:07 +0000[diff] [blame]136 dbgs() << '\n';
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]137}
Manman Renc3366cc2012-09-06 19:55:56 +0000[diff] [blame]138#endif
Daniel Dunbarb34a2b92009-08-31 08:07:33 +0000[diff] [blame]139
140/* *** */
141
Chris Lattnera0020be2009-09-08 06:27:48 +0000[diff] [blame]142const MCBinaryExpr *MCBinaryExpr::Create(Opcode Opc, const MCExpr *LHS,
143 const MCExpr *RHS, MCContext &Ctx) {
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]144 return new (Ctx) MCBinaryExpr(Opc, LHS, RHS);
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]145}
146
Chris Lattnera0020be2009-09-08 06:27:48 +0000[diff] [blame]147const MCUnaryExpr *MCUnaryExpr::Create(Opcode Opc, const MCExpr *Expr,
148 MCContext &Ctx) {
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]149 return new (Ctx) MCUnaryExpr(Opc, Expr);
150}
151
152const MCConstantExpr *MCConstantExpr::Create(int64_t Value, MCContext &Ctx) {
153 return new (Ctx) MCConstantExpr(Value);
154}
155
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]156/* *** */
157
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]158const MCSymbolRefExpr *MCSymbolRefExpr::Create(const MCSymbol *Sym,
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]159 VariantKind Kind,
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]160 MCContext &Ctx) {
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]161 return new (Ctx) MCSymbolRefExpr(Sym, Kind);
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]162}
163
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]164const MCSymbolRefExpr *MCSymbolRefExpr::Create(StringRef Name, VariantKind Kind,
165 MCContext &Ctx) {
166 return Create(Ctx.GetOrCreateSymbol(Name), Kind, Ctx);
Chris Lattner6a833f62009-09-16 01:26:31 +0000[diff] [blame]167}
168
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]169StringRef MCSymbolRefExpr::getVariantKindName(VariantKind Kind) {
170 switch (Kind) {
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]171 case VK_Invalid: return "<<invalid>>";
172 case VK_None: return "<<none>>";
173
174 case VK_GOT: return "GOT";
175 case VK_GOTOFF: return "GOTOFF";
176 case VK_GOTPCREL: return "GOTPCREL";
177 case VK_GOTTPOFF: return "GOTTPOFF";
178 case VK_INDNTPOFF: return "INDNTPOFF";
179 case VK_NTPOFF: return "NTPOFF";
Rafael Espindolab3b49bb2010-10-28 14:22:44 +0000[diff] [blame]180 case VK_GOTNTPOFF: return "GOTNTPOFF";
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]181 case VK_PLT: return "PLT";
182 case VK_TLSGD: return "TLSGD";
Rafael Espindola2dbec3f2010-10-28 15:02:40 +0000[diff] [blame]183 case VK_TLSLD: return "TLSLD";
Rafael Espindola6f23eb32010-10-28 14:37:09 +0000[diff] [blame]184 case VK_TLSLDM: return "TLSLDM";
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]185 case VK_TPOFF: return "TPOFF";
Rafael Espindolae8f08be2010-10-28 14:48:59 +0000[diff] [blame]186 case VK_DTPOFF: return "DTPOFF";
Chris Lattner94f0c142010-11-14 22:22:59 +0000[diff] [blame]187 case VK_TLVP: return "TLVP";
Benjamin Kramer9c9e0a22013-03-30 16:21:50 +0000[diff] [blame]188 case VK_SECREL: return "SECREL32";
Logan Chien4dd14fb2012-12-12 07:14:46 +0000[diff] [blame]189 case VK_ARM_NONE: return "(NONE)";
Jim Grosbach85dcd3d2010-09-22 23:27:36 +0000[diff] [blame]190 case VK_ARM_PLT: return "(PLT)";
Jim Grosbachf23b2d92010-11-10 03:26:07 +0000[diff] [blame]191 case VK_ARM_GOT: return "(GOT)";
192 case VK_ARM_GOTOFF: return "(GOTOFF)";
193 case VK_ARM_TPOFF: return "(tpoff)";
194 case VK_ARM_GOTTPOFF: return "(gottpoff)";
Jim Grosbachd82684c72010-11-17 19:30:11 +0000[diff] [blame]195 case VK_ARM_TLSGD: return "(tlsgd)";
James Molloy6685c082012-01-26 09:25:43 +0000[diff] [blame]196 case VK_ARM_TARGET1: return "(target1)";
Anton Korobeynikova305ea52012-11-09 20:20:12 +0000[diff] [blame]197 case VK_ARM_TARGET2: return "(target2)";
Logan Chien4dd14fb2012-12-12 07:14:46 +0000[diff] [blame]198 case VK_ARM_PREL31: return "(prel31)";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]199 case VK_PPC_LO: return "l";
Ulrich Weigande67c5652013-06-21 14:42:49 +0000[diff] [blame]200 case VK_PPC_HI: return "h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]201 case VK_PPC_HA: return "ha";
Ulrich Weigande9126f52013-06-21 14:43:42 +0000[diff] [blame]202 case VK_PPC_HIGHER: return "higher";
203 case VK_PPC_HIGHERA: return "highera";
204 case VK_PPC_HIGHEST: return "highest";
205 case VK_PPC_HIGHESTA: return "highesta";
Ulrich Weigand93372b42013-06-25 16:49:50 +0000[diff] [blame]206 case VK_PPC_GOT_LO: return "got@l";
207 case VK_PPC_GOT_HI: return "got@h";
208 case VK_PPC_GOT_HA: return "got@ha";
Ulrich Weigand68e2e1b2013-06-20 22:39:42 +0000[diff] [blame]209 case VK_PPC_TOCBASE: return "tocbase";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]210 case VK_PPC_TOC: return "toc";
211 case VK_PPC_TOC_LO: return "toc@l";
Ulrich Weigand72ddbd62013-06-21 14:43:10 +0000[diff] [blame]212 case VK_PPC_TOC_HI: return "toc@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]213 case VK_PPC_TOC_HA: return "toc@ha";
Ulrich Weigandf11efe72013-07-01 23:33:29 +0000[diff] [blame^]214 case VK_PPC_DTPMOD: return "dtpmod";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]215 case VK_PPC_TPREL: return "tprel";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]216 case VK_PPC_TPREL_LO: return "tprel@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]217 case VK_PPC_TPREL_HI: return "tprel@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]218 case VK_PPC_TPREL_HA: return "tprel@ha";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]219 case VK_PPC_TPREL_HIGHER: return "tprel@higher";
220 case VK_PPC_TPREL_HIGHERA: return "tprel@highera";
221 case VK_PPC_TPREL_HIGHEST: return "tprel@highest";
222 case VK_PPC_TPREL_HIGHESTA: return "tprel@highesta";
223 case VK_PPC_DTPREL: return "dtprel";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]224 case VK_PPC_DTPREL_LO: return "dtprel@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]225 case VK_PPC_DTPREL_HI: return "dtprel@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]226 case VK_PPC_DTPREL_HA: return "dtprel@ha";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]227 case VK_PPC_DTPREL_HIGHER: return "dtprel@higher";
228 case VK_PPC_DTPREL_HIGHERA: return "dtprel@highera";
229 case VK_PPC_DTPREL_HIGHEST: return "dtprel@highest";
230 case VK_PPC_DTPREL_HIGHESTA: return "dtprel@highesta";
231 case VK_PPC_GOT_TPREL: return "got@tprel";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]232 case VK_PPC_GOT_TPREL_LO: return "got@tprel@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]233 case VK_PPC_GOT_TPREL_HI: return "got@tprel@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]234 case VK_PPC_GOT_TPREL_HA: return "got@tprel@ha";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]235 case VK_PPC_GOT_DTPREL: return "got@dtprel";
236 case VK_PPC_GOT_DTPREL_LO: return "got@dtprel@l";
237 case VK_PPC_GOT_DTPREL_HI: return "got@dtprel@h";
238 case VK_PPC_GOT_DTPREL_HA: return "got@dtprel@ha";
Bill Schmidtca4a0c92012-12-04 16:18:08 +0000[diff] [blame]239 case VK_PPC_TLS: return "tls";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]240 case VK_PPC_GOT_TLSGD: return "got@tlsgd";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]241 case VK_PPC_GOT_TLSGD_LO: return "got@tlsgd@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]242 case VK_PPC_GOT_TLSGD_HI: return "got@tlsgd@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]243 case VK_PPC_GOT_TLSGD_HA: return "got@tlsgd@ha";
Bill Schmidtc56f1d32012-12-11 20:30:11 +0000[diff] [blame]244 case VK_PPC_TLSGD: return "tlsgd";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]245 case VK_PPC_GOT_TLSLD: return "got@tlsld";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]246 case VK_PPC_GOT_TLSLD_LO: return "got@tlsld@l";
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]247 case VK_PPC_GOT_TLSLD_HI: return "got@tlsld@h";
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]248 case VK_PPC_GOT_TLSLD_HA: return "got@tlsld@ha";
Bill Schmidt24b8dd62012-12-12 19:29:35 +0000[diff] [blame]249 case VK_PPC_TLSLD: return "tlsld";
Akira Hatanakae2eed962011-12-22 01:05:17 +0000[diff] [blame]250 case VK_Mips_GPREL: return "GPREL";
251 case VK_Mips_GOT_CALL: return "GOT_CALL";
252 case VK_Mips_GOT16: return "GOT16";
253 case VK_Mips_GOT: return "GOT";
254 case VK_Mips_ABS_HI: return "ABS_HI";
255 case VK_Mips_ABS_LO: return "ABS_LO";
256 case VK_Mips_TLSGD: return "TLSGD";
257 case VK_Mips_TLSLDM: return "TLSLDM";
258 case VK_Mips_DTPREL_HI: return "DTPREL_HI";
259 case VK_Mips_DTPREL_LO: return "DTPREL_LO";
260 case VK_Mips_GOTTPREL: return "GOTTPREL";
261 case VK_Mips_TPREL_HI: return "TPREL_HI";
262 case VK_Mips_TPREL_LO: return "TPREL_LO";
263 case VK_Mips_GPOFF_HI: return "GPOFF_HI";
264 case VK_Mips_GPOFF_LO: return "GPOFF_LO";
265 case VK_Mips_GOT_DISP: return "GOT_DISP";
266 case VK_Mips_GOT_PAGE: return "GOT_PAGE";
267 case VK_Mips_GOT_OFST: return "GOT_OFST";
Akira Hatanakaf73e3622012-07-21 02:15:19 +0000[diff] [blame]268 case VK_Mips_HIGHER: return "HIGHER";
269 case VK_Mips_HIGHEST: return "HIGHEST";
Akira Hatanaka64b52d82012-11-21 19:50:22 +0000[diff] [blame]270 case VK_Mips_GOT_HI16: return "GOT_HI16";
271 case VK_Mips_GOT_LO16: return "GOT_LO16";
272 case VK_Mips_CALL_HI16: return "CALL_HI16";
273 case VK_Mips_CALL_LO16: return "CALL_LO16";
Nico Rieck1da45292013-04-10 23:28:17 +0000[diff] [blame]274 case VK_COFF_IMGREL32: return "IMGREL32";
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]275 }
Chandler Carruthf3e85022012-01-10 18:08:01 +0000[diff] [blame]276 llvm_unreachable("Invalid variant kind");
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]277}
278
279MCSymbolRefExpr::VariantKind
280MCSymbolRefExpr::getVariantKindForName(StringRef Name) {
281 return StringSwitch<VariantKind>(Name)
282 .Case("GOT", VK_GOT)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]283 .Case("got", VK_GOT)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]284 .Case("GOTOFF", VK_GOTOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]285 .Case("gotoff", VK_GOTOFF)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]286 .Case("GOTPCREL", VK_GOTPCREL)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]287 .Case("gotpcrel", VK_GOTPCREL)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]288 .Case("GOTTPOFF", VK_GOTTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]289 .Case("gottpoff", VK_GOTTPOFF)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]290 .Case("INDNTPOFF", VK_INDNTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]291 .Case("indntpoff", VK_INDNTPOFF)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]292 .Case("NTPOFF", VK_NTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]293 .Case("ntpoff", VK_NTPOFF)
Rafael Espindolab3b49bb2010-10-28 14:22:44 +0000[diff] [blame]294 .Case("GOTNTPOFF", VK_GOTNTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]295 .Case("gotntpoff", VK_GOTNTPOFF)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]296 .Case("PLT", VK_PLT)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]297 .Case("plt", VK_PLT)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]298 .Case("TLSGD", VK_TLSGD)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]299 .Case("tlsgd", VK_TLSGD)
Rafael Espindola2dbec3f2010-10-28 15:02:40 +0000[diff] [blame]300 .Case("TLSLD", VK_TLSLD)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]301 .Case("tlsld", VK_TLSLD)
Rafael Espindola6f23eb32010-10-28 14:37:09 +0000[diff] [blame]302 .Case("TLSLDM", VK_TLSLDM)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]303 .Case("tlsldm", VK_TLSLDM)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]304 .Case("TPOFF", VK_TPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]305 .Case("tpoff", VK_TPOFF)
Rafael Espindolae8f08be2010-10-28 14:48:59 +0000[diff] [blame]306 .Case("DTPOFF", VK_DTPOFF)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]307 .Case("dtpoff", VK_DTPOFF)
Eric Christophere7b64dc2010-05-26 00:02:12 +0000[diff] [blame]308 .Case("TLVP", VK_TLVP)
Rafael Espindola8bac4232011-01-23 16:11:25 +0000[diff] [blame]309 .Case("tlvp", VK_TLVP)
Nico Rieck1da45292013-04-10 23:28:17 +0000[diff] [blame]310 .Case("IMGREL", VK_COFF_IMGREL32)
311 .Case("imgrel", VK_COFF_IMGREL32)
Rafael Espindolab770f892013-04-25 19:27:05 +0000[diff] [blame]312 .Case("SECREL32", VK_SECREL)
313 .Case("secrel32", VK_SECREL)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]314 .Case("L", VK_PPC_LO)
315 .Case("l", VK_PPC_LO)
Ulrich Weigande67c5652013-06-21 14:42:49 +0000[diff] [blame]316 .Case("H", VK_PPC_HI)
317 .Case("h", VK_PPC_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]318 .Case("HA", VK_PPC_HA)
319 .Case("ha", VK_PPC_HA)
Ulrich Weigande9126f52013-06-21 14:43:42 +0000[diff] [blame]320 .Case("HIGHER", VK_PPC_HIGHER)
321 .Case("higher", VK_PPC_HIGHER)
322 .Case("HIGHERA", VK_PPC_HIGHERA)
323 .Case("highera", VK_PPC_HIGHERA)
324 .Case("HIGHEST", VK_PPC_HIGHEST)
325 .Case("highest", VK_PPC_HIGHEST)
326 .Case("HIGHESTA", VK_PPC_HIGHESTA)
327 .Case("highesta", VK_PPC_HIGHESTA)
Ulrich Weigand93372b42013-06-25 16:49:50 +0000[diff] [blame]328 .Case("GOT@L", VK_PPC_GOT_LO)
329 .Case("got@l", VK_PPC_GOT_LO)
330 .Case("GOT@H", VK_PPC_GOT_HI)
331 .Case("got@h", VK_PPC_GOT_HI)
332 .Case("GOT@HA", VK_PPC_GOT_HA)
333 .Case("got@ha", VK_PPC_GOT_HA)
Ulrich Weigand68e2e1b2013-06-20 22:39:42 +0000[diff] [blame]334 .Case("TOCBASE", VK_PPC_TOCBASE)
335 .Case("tocbase", VK_PPC_TOCBASE)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]336 .Case("TOC", VK_PPC_TOC)
337 .Case("toc", VK_PPC_TOC)
338 .Case("TOC@L", VK_PPC_TOC_LO)
339 .Case("toc@l", VK_PPC_TOC_LO)
Ulrich Weigand72ddbd62013-06-21 14:43:10 +0000[diff] [blame]340 .Case("TOC@H", VK_PPC_TOC_HI)
341 .Case("toc@h", VK_PPC_TOC_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]342 .Case("TOC@HA", VK_PPC_TOC_HA)
343 .Case("toc@ha", VK_PPC_TOC_HA)
Ulrich Weigand2c3a2192013-05-03 19:52:35 +0000[diff] [blame]344 .Case("TLS", VK_PPC_TLS)
345 .Case("tls", VK_PPC_TLS)
Ulrich Weigandf11efe72013-07-01 23:33:29 +0000[diff] [blame^]346 .Case("DTPMOD", VK_PPC_DTPMOD)
347 .Case("dtpmod", VK_PPC_DTPMOD)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]348 .Case("TPREL", VK_PPC_TPREL)
349 .Case("tprel", VK_PPC_TPREL)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]350 .Case("TPREL@L", VK_PPC_TPREL_LO)
351 .Case("tprel@l", VK_PPC_TPREL_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]352 .Case("TPREL@H", VK_PPC_TPREL_HI)
353 .Case("tprel@h", VK_PPC_TPREL_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]354 .Case("TPREL@HA", VK_PPC_TPREL_HA)
355 .Case("tprel@ha", VK_PPC_TPREL_HA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]356 .Case("TPREL@HIGHER", VK_PPC_TPREL_HIGHER)
357 .Case("tprel@higher", VK_PPC_TPREL_HIGHER)
358 .Case("TPREL@HIGHERA", VK_PPC_TPREL_HIGHERA)
359 .Case("tprel@highera", VK_PPC_TPREL_HIGHERA)
360 .Case("TPREL@HIGHEST", VK_PPC_TPREL_HIGHEST)
361 .Case("tprel@highest", VK_PPC_TPREL_HIGHEST)
362 .Case("TPREL@HIGHESTA", VK_PPC_TPREL_HIGHESTA)
363 .Case("tprel@highesta", VK_PPC_TPREL_HIGHESTA)
364 .Case("DTPREL", VK_PPC_DTPREL)
365 .Case("dtprel", VK_PPC_DTPREL)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]366 .Case("DTPREL@L", VK_PPC_DTPREL_LO)
367 .Case("dtprel@l", VK_PPC_DTPREL_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]368 .Case("DTPREL@H", VK_PPC_DTPREL_HI)
369 .Case("dtprel@h", VK_PPC_DTPREL_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]370 .Case("DTPREL@HA", VK_PPC_DTPREL_HA)
371 .Case("dtprel@ha", VK_PPC_DTPREL_HA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]372 .Case("DTPREL@HIGHER", VK_PPC_DTPREL_HIGHER)
373 .Case("dtprel@higher", VK_PPC_DTPREL_HIGHER)
374 .Case("DTPREL@HIGHERA", VK_PPC_DTPREL_HIGHERA)
375 .Case("dtprel@highera", VK_PPC_DTPREL_HIGHERA)
376 .Case("DTPREL@HIGHEST", VK_PPC_DTPREL_HIGHEST)
377 .Case("dtprel@highest", VK_PPC_DTPREL_HIGHEST)
378 .Case("DTPREL@HIGHESTA", VK_PPC_DTPREL_HIGHESTA)
379 .Case("dtprel@highesta", VK_PPC_DTPREL_HIGHESTA)
380 .Case("GOT@TPREL", VK_PPC_GOT_TPREL)
381 .Case("got@tprel", VK_PPC_GOT_TPREL)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]382 .Case("GOT@TPREL@L", VK_PPC_GOT_TPREL_LO)
383 .Case("got@tprel@l", VK_PPC_GOT_TPREL_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]384 .Case("GOT@TPREL@H", VK_PPC_GOT_TPREL_HI)
385 .Case("got@tprel@h", VK_PPC_GOT_TPREL_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]386 .Case("GOT@TPREL@HA", VK_PPC_GOT_TPREL_HA)
387 .Case("got@tprel@ha", VK_PPC_GOT_TPREL_HA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]388 .Case("GOT@DTPREL", VK_PPC_GOT_DTPREL)
389 .Case("got@dtprel", VK_PPC_GOT_DTPREL)
390 .Case("GOT@DTPREL@L", VK_PPC_GOT_DTPREL_LO)
391 .Case("got@dtprel@l", VK_PPC_GOT_DTPREL_LO)
392 .Case("GOT@DTPREL@H", VK_PPC_GOT_DTPREL_HI)
393 .Case("got@dtprel@h", VK_PPC_GOT_DTPREL_HI)
394 .Case("GOT@DTPREL@HA", VK_PPC_GOT_DTPREL_HA)
395 .Case("got@dtprel@ha", VK_PPC_GOT_DTPREL_HA)
396 .Case("GOT@TLSGD", VK_PPC_GOT_TLSGD)
397 .Case("got@tlsgd", VK_PPC_GOT_TLSGD)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]398 .Case("GOT@TLSGD@L", VK_PPC_GOT_TLSGD_LO)
399 .Case("got@tlsgd@l", VK_PPC_GOT_TLSGD_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]400 .Case("GOT@TLSGD@H", VK_PPC_GOT_TLSGD_HI)
401 .Case("got@tlsgd@h", VK_PPC_GOT_TLSGD_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]402 .Case("GOT@TLSGD@HA", VK_PPC_GOT_TLSGD_HA)
403 .Case("got@tlsgd@ha", VK_PPC_GOT_TLSGD_HA)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]404 .Case("GOT@TLSLD", VK_PPC_GOT_TLSLD)
405 .Case("got@tlsld", VK_PPC_GOT_TLSLD)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]406 .Case("GOT@TLSLD@L", VK_PPC_GOT_TLSLD_LO)
407 .Case("got@tlsld@l", VK_PPC_GOT_TLSLD_LO)
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame]408 .Case("GOT@TLSLD@H", VK_PPC_GOT_TLSLD_HI)
409 .Case("got@tlsld@h", VK_PPC_GOT_TLSLD_HI)
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]410 .Case("GOT@TLSLD@HA", VK_PPC_GOT_TLSLD_HA)
411 .Case("got@tlsld@ha", VK_PPC_GOT_TLSLD_HA)
Daniel Dunbar55992562010-03-15 23:51:06 +0000[diff] [blame]412 .Default(VK_Invalid);
413}
414
415/* *** */
416
Craig Topper2a6a08b2012-09-26 06:36:36 +0000[diff] [blame]417void MCTargetExpr::anchor() {}
Chris Lattner6a833f62009-09-16 01:26:31 +0000[diff] [blame]418
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]419/* *** */
420
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]421bool MCExpr::EvaluateAsAbsolute(int64_t &Res) const {
422 return EvaluateAsAbsolute(Res, 0, 0, 0);
423}
424
425bool MCExpr::EvaluateAsAbsolute(int64_t &Res,
426 const MCAsmLayout &Layout) const {
427 return EvaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, 0);
428}
429
430bool MCExpr::EvaluateAsAbsolute(int64_t &Res,
431 const MCAsmLayout &Layout,
432 const SectionAddrMap &Addrs) const {
433 return EvaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, &Addrs);
434}
435
436bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAssembler &Asm) const {
437 return EvaluateAsAbsolute(Res, &Asm, 0, 0);
438}
439
440bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
441 const MCAsmLayout *Layout,
Rafael Espindola93e3cf02010-12-07 00:27:36 +0000[diff] [blame]442 const SectionAddrMap *Addrs) const {
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]443 MCValue Value;
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]444
Daniel Dunbar5cfb5872010-03-23 23:47:07 +0000[diff] [blame]445 // Fast path constants.
446 if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(this)) {
447 Res = CE->getValue();
448 return true;
449 }
450
Rafael Espindola293a7c12010-12-18 04:19:20 +0000[diff] [blame]451 // FIXME: The use if InSet = Addrs is a hack. Setting InSet causes us
452 // absolutize differences across sections and that is what the MachO writer
453 // uses Addrs for.
Rafael Espindola4124ab12010-12-22 22:16:24 +0000[diff] [blame]454 bool IsRelocatable =
455 EvaluateAsRelocatableImpl(Value, Asm, Layout, Addrs, /*InSet*/ Addrs);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]456
Rafael Espindola4124ab12010-12-22 22:16:24 +0000[diff] [blame]457 // Record the current value.
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]458 Res = Value.getConstant();
Rafael Espindola4124ab12010-12-22 22:16:24 +0000[diff] [blame]459
460 return IsRelocatable && Value.isAbsolute();
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]461}
462
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]463/// \brief Helper method for \see EvaluateSymbolAdd().
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]464static void AttemptToFoldSymbolOffsetDifference(const MCAssembler *Asm,
465 const MCAsmLayout *Layout,
466 const SectionAddrMap *Addrs,
467 bool InSet,
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]468 const MCSymbolRefExpr *&A,
469 const MCSymbolRefExpr *&B,
470 int64_t &Addend) {
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]471 if (!A || !B)
472 return;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]473
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]474 const MCSymbol &SA = A->getSymbol();
475 const MCSymbol &SB = B->getSymbol();
476
477 if (SA.isUndefined() || SB.isUndefined())
478 return;
479
480 if (!Asm->getWriter().IsSymbolRefDifferenceFullyResolved(*Asm, A, B, InSet))
481 return;
482
483 MCSymbolData &AD = Asm->getSymbolData(SA);
484 MCSymbolData &BD = Asm->getSymbolData(SB);
485
486 if (AD.getFragment() == BD.getFragment()) {
487 Addend += (AD.getOffset() - BD.getOffset());
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]488
Owen Anderson97462862011-03-21 23:13:43 +0000[diff] [blame]489 // Pointers to Thumb symbols need to have their low-bit set to allow
490 // for interworking.
491 if (Asm->isThumbFunc(&SA))
492 Addend |= 1;
493
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]494 // Clear the symbol expr pointers to indicate we have folded these
495 // operands.
496 A = B = 0;
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]497 return;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]498 }
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]499
500 if (!Layout)
501 return;
502
503 const MCSectionData &SecA = *AD.getFragment()->getParent();
504 const MCSectionData &SecB = *BD.getFragment()->getParent();
505
506 if ((&SecA != &SecB) && !Addrs)
507 return;
508
509 // Eagerly evaluate.
510 Addend += (Layout->getSymbolOffset(&Asm->getSymbolData(A->getSymbol())) -
511 Layout->getSymbolOffset(&Asm->getSymbolData(B->getSymbol())));
512 if (Addrs && (&SecA != &SecB))
513 Addend += (Addrs->lookup(&SecA) - Addrs->lookup(&SecB));
514
Jim Grosbach213039a2012-02-24 05:12:18 +0000[diff] [blame]515 // Pointers to Thumb symbols need to have their low-bit set to allow
516 // for interworking.
517 if (Asm->isThumbFunc(&SA))
518 Addend |= 1;
519
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]520 // Clear the symbol expr pointers to indicate we have folded these
521 // operands.
522 A = B = 0;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]523}
524
Daniel Dunbar395a0992010-12-16 18:36:25 +0000[diff] [blame]525/// \brief Evaluate the result of an add between (conceptually) two MCValues.
526///
527/// This routine conceptually attempts to construct an MCValue:
528/// Result = (Result_A - Result_B + Result_Cst)
529/// from two MCValue's LHS and RHS where
530/// Result = LHS + RHS
531/// and
532/// Result = (LHS_A - LHS_B + LHS_Cst) + (RHS_A - RHS_B + RHS_Cst).
533///
534/// This routine attempts to aggresively fold the operands such that the result
535/// is representable in an MCValue, but may not always succeed.
536///
537/// \returns True on success, false if the result is not representable in an
538/// MCValue.
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]539
540/// NOTE: It is really important to have both the Asm and Layout arguments.
541/// They might look redundant, but this function can be used before layout
542/// is done (see the object streamer for example) and having the Asm argument
Rafael Espindola1ea7f182010-12-18 04:01:45 +0000[diff] [blame]543/// lets us avoid relaxations early.
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]544static bool EvaluateSymbolicAdd(const MCAssembler *Asm,
545 const MCAsmLayout *Layout,
Rafael Espindola93e3cf02010-12-07 00:27:36 +0000[diff] [blame]546 const SectionAddrMap *Addrs,
Rafael Espindola57ab7082010-12-03 00:55:40 +0000[diff] [blame]547 bool InSet,
Rafael Espindola4262a222010-10-16 18:23:53 +0000[diff] [blame]548 const MCValue &LHS,const MCSymbolRefExpr *RHS_A,
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]549 const MCSymbolRefExpr *RHS_B, int64_t RHS_Cst,
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]550 MCValue &Res) {
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]551 // FIXME: This routine (and other evaluation parts) are *incredibly* sloppy
552 // about dealing with modifiers. This will ultimately bite us, one day.
553 const MCSymbolRefExpr *LHS_A = LHS.getSymA();
554 const MCSymbolRefExpr *LHS_B = LHS.getSymB();
555 int64_t LHS_Cst = LHS.getConstant();
556
557 // Fold the result constant immediately.
558 int64_t Result_Cst = LHS_Cst + RHS_Cst;
559
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]560 assert((!Layout || Asm) &&
561 "Must have an assembler object if layout is given!");
562
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]563 // If we have a layout, we can fold resolved differences.
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]564 if (Asm) {
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]565 // First, fold out any differences which are fully resolved. By
566 // reassociating terms in
567 // Result = (LHS_A - LHS_B + LHS_Cst) + (RHS_A - RHS_B + RHS_Cst).
568 // we have the four possible differences:
569 // (LHS_A - LHS_B),
570 // (LHS_A - RHS_B),
571 // (RHS_A - LHS_B),
572 // (RHS_A - RHS_B).
Chris Lattner0ab5e2c2011-04-15 05:18:47 +0000[diff] [blame]573 // Since we are attempting to be as aggressive as possible about folding, we
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]574 // attempt to evaluate each possible alternative.
Rafael Espindolaee546362010-12-19 04:18:56 +0000[diff] [blame]575 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, LHS_A, LHS_B,
576 Result_Cst);
577 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, LHS_A, RHS_B,
578 Result_Cst);
579 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, RHS_A, LHS_B,
580 Result_Cst);
581 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, RHS_A, RHS_B,
582 Result_Cst);
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]583 }
584
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]585 // We can't represent the addition or subtraction of two symbols.
586 if ((LHS_A && RHS_A) || (LHS_B && RHS_B))
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]587 return false;
588
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]589 // At this point, we have at most one additive symbol and one subtractive
590 // symbol -- find them.
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]591 const MCSymbolRefExpr *A = LHS_A ? LHS_A : RHS_A;
592 const MCSymbolRefExpr *B = LHS_B ? LHS_B : RHS_B;
Daniel Dunbar137d4222010-12-17 05:50:33 +0000[diff] [blame]593
594 // If we have a negated symbol, then we must have also have a non-negated
595 // symbol in order to encode the expression.
596 if (B && !A)
597 return false;
Rafael Espindola4262a222010-10-16 18:23:53 +0000[diff] [blame]598
Daniel Dunbar76793ba2010-12-17 01:07:20 +0000[diff] [blame]599 Res = MCValue::get(A, B, Result_Cst);
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]600 return true;
601}
602
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]603bool MCExpr::EvaluateAsRelocatable(MCValue &Res,
Rafael Espindola50ce2f02010-12-22 16:11:57 +0000[diff] [blame]604 const MCAsmLayout &Layout) const {
605 return EvaluateAsRelocatableImpl(Res, &Layout.getAssembler(), &Layout,
606 0, false);
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]607}
608
Rafael Espindola4262a222010-10-16 18:23:53 +0000[diff] [blame]609bool MCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]610 const MCAssembler *Asm,
Rafael Espindola4262a222010-10-16 18:23:53 +0000[diff] [blame]611 const MCAsmLayout *Layout,
Rafael Espindola93e3cf02010-12-07 00:27:36 +0000[diff] [blame]612 const SectionAddrMap *Addrs,
Rafael Espindola4262a222010-10-16 18:23:53 +0000[diff] [blame]613 bool InSet) const {
Daniel Dunbar5376c2a2010-03-23 23:47:14 +0000[diff] [blame]614 ++stats::MCExprEvaluate;
615
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]616 switch (getKind()) {
Chris Lattner38d022e2010-02-08 19:41:07 +0000[diff] [blame]617 case Target:
Daniel Dunbarac8a9542010-03-11 02:28:59 +0000[diff] [blame]618 return cast<MCTargetExpr>(this)->EvaluateAsRelocatableImpl(Res, Layout);
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]619
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]620 case Constant:
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]621 Res = MCValue::get(cast<MCConstantExpr>(this)->getValue());
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]622 return true;
623
624 case SymbolRef: {
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]625 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
626 const MCSymbol &Sym = SRE->getSymbol();
Daniel Dunbar17b90272009-10-16 01:33:57 +0000[diff] [blame]627
628 // Evaluate recursively if this is a variable.
Rafael Espindola8c3039b2010-11-15 16:33:49 +0000[diff] [blame]629 if (Sym.isVariable() && SRE->getKind() == MCSymbolRefExpr::VK_None) {
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]630 bool Ret = Sym.getVariableValue()->EvaluateAsRelocatableImpl(Res, Asm,
631 Layout,
632 Addrs,
633 true);
Rafael Espindola8c3039b2010-11-15 16:33:49 +0000[diff] [blame]634 // If we failed to simplify this to a constant, let the target
635 // handle it.
636 if (Ret && !Res.getSymA() && !Res.getSymB())
637 return true;
638 }
Daniel Dunbar17b90272009-10-16 01:33:57 +0000[diff] [blame]639
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]640 Res = MCValue::get(SRE, 0, 0);
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]641 return true;
642 }
643
644 case Unary: {
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]645 const MCUnaryExpr *AUE = cast<MCUnaryExpr>(this);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]646 MCValue Value;
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]647
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]648 if (!AUE->getSubExpr()->EvaluateAsRelocatableImpl(Value, Asm, Layout,
Rafael Espindola93e3cf02010-12-07 00:27:36 +0000[diff] [blame]649 Addrs, InSet))
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]650 return false;
651
652 switch (AUE->getOpcode()) {
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]653 case MCUnaryExpr::LNot:
Daniel Dunbar0d5fc9a2009-07-01 06:48:00 +0000[diff] [blame]654 if (!Value.isAbsolute())
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]655 return false;
656 Res = MCValue::get(!Value.getConstant());
657 break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]658 case MCUnaryExpr::Minus:
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]659 /// -(a - b + const) ==> (b - a - const)
Daniel Dunbar7f8a9eb2009-08-11 17:47:52 +0000[diff] [blame]660 if (Value.getSymA() && !Value.getSymB())
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]661 return false;
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]662 Res = MCValue::get(Value.getSymB(), Value.getSymA(),
663 -Value.getConstant());
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]664 break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]665 case MCUnaryExpr::Not:
Daniel Dunbar0d5fc9a2009-07-01 06:48:00 +0000[diff] [blame]666 if (!Value.isAbsolute())
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]667 return false;
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]668 Res = MCValue::get(~Value.getConstant());
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]669 break;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]670 case MCUnaryExpr::Plus:
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]671 Res = Value;
672 break;
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]673 }
674
675 return true;
676 }
677
678 case Binary: {
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]679 const MCBinaryExpr *ABE = cast<MCBinaryExpr>(this);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]680 MCValue LHSValue, RHSValue;
Daniel Dunbar9c64ec02010-03-18 00:59:10 +0000[diff] [blame]681
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]682 if (!ABE->getLHS()->EvaluateAsRelocatableImpl(LHSValue, Asm, Layout,
Rafael Espindola93e3cf02010-12-07 00:27:36 +0000[diff] [blame]683 Addrs, InSet) ||
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]684 !ABE->getRHS()->EvaluateAsRelocatableImpl(RHSValue, Asm, Layout,
Rafael Espindola93e3cf02010-12-07 00:27:36 +0000[diff] [blame]685 Addrs, InSet))
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]686 return false;
687
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]688 // We only support a few operations on non-constant expressions, handle
689 // those first.
Daniel Dunbar0d5fc9a2009-07-01 06:48:00 +0000[diff] [blame]690 if (!LHSValue.isAbsolute() || !RHSValue.isAbsolute()) {
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]691 switch (ABE->getOpcode()) {
692 default:
693 return false;
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]694 case MCBinaryExpr::Sub:
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]695 // Negate RHS and add.
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]696 return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]697 RHSValue.getSymB(), RHSValue.getSymA(),
698 -RHSValue.getConstant(),
699 Res);
700
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]701 case MCBinaryExpr::Add:
Rafael Espindola5004f4a2010-12-18 03:57:21 +0000[diff] [blame]702 return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
Daniel Dunbar19f847f2009-06-30 02:08:27 +0000[diff] [blame]703 RHSValue.getSymA(), RHSValue.getSymB(),
704 RHSValue.getConstant(),
705 Res);
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]706 }
707 }
708
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]709 // FIXME: We need target hooks for the evaluation. It may be limited in
Dan Gohman9a9d9ea2010-02-08 23:58:47 +0000[diff] [blame]710 // width, and gas defines the result of comparisons and right shifts
711 // differently from Apple as.
Daniel Dunbar39712732009-06-30 16:02:47 +0000[diff] [blame]712 int64_t LHS = LHSValue.getConstant(), RHS = RHSValue.getConstant();
713 int64_t Result = 0;
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]714 switch (ABE->getOpcode()) {
Daniel Dunbar115e4d62009-08-31 08:06:59 +0000[diff] [blame]715 case MCBinaryExpr::Add: Result = LHS + RHS; break;
716 case MCBinaryExpr::And: Result = LHS & RHS; break;
717 case MCBinaryExpr::Div: Result = LHS / RHS; break;
718 case MCBinaryExpr::EQ: Result = LHS == RHS; break;
719 case MCBinaryExpr::GT: Result = LHS > RHS; break;
720 case MCBinaryExpr::GTE: Result = LHS >= RHS; break;
721 case MCBinaryExpr::LAnd: Result = LHS && RHS; break;
722 case MCBinaryExpr::LOr: Result = LHS || RHS; break;
723 case MCBinaryExpr::LT: Result = LHS < RHS; break;
724 case MCBinaryExpr::LTE: Result = LHS <= RHS; break;
725 case MCBinaryExpr::Mod: Result = LHS % RHS; break;
726 case MCBinaryExpr::Mul: Result = LHS * RHS; break;
727 case MCBinaryExpr::NE: Result = LHS != RHS; break;
728 case MCBinaryExpr::Or: Result = LHS | RHS; break;
729 case MCBinaryExpr::Shl: Result = LHS << RHS; break;
730 case MCBinaryExpr::Shr: Result = LHS >> RHS; break;
731 case MCBinaryExpr::Sub: Result = LHS - RHS; break;
732 case MCBinaryExpr::Xor: Result = LHS ^ RHS; break;
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]733 }
734
Daniel Dunbarbd4bf3d2009-06-30 01:49:52 +0000[diff] [blame]735 Res = MCValue::get(Result);
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]736 return true;
737 }
738 }
Daniel Dunbar84bfd7b2009-06-29 20:40:36 +0000[diff] [blame]739
Craig Toppera2886c22012-02-07 05:05:23 +0000[diff] [blame]740 llvm_unreachable("Invalid assembly expression kind!");
Daniel Dunbarf3636452009-08-31 08:07:22 +0000[diff] [blame]741}
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]742
743const MCSection *MCExpr::FindAssociatedSection() const {
744 switch (getKind()) {
745 case Target:
746 // We never look through target specific expressions.
747 return cast<MCTargetExpr>(this)->FindAssociatedSection();
748
749 case Constant:
750 return MCSymbol::AbsolutePseudoSection;
751
752 case SymbolRef: {
753 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
754 const MCSymbol &Sym = SRE->getSymbol();
755
756 if (Sym.isDefined())
757 return &Sym.getSection();
758
759 return 0;
760 }
761
762 case Unary:
763 return cast<MCUnaryExpr>(this)->getSubExpr()->FindAssociatedSection();
764
765 case Binary: {
766 const MCBinaryExpr *BE = cast<MCBinaryExpr>(this);
767 const MCSection *LHS_S = BE->getLHS()->FindAssociatedSection();
768 const MCSection *RHS_S = BE->getRHS()->FindAssociatedSection();
769
770 // If either section is absolute, return the other.
771 if (LHS_S == MCSymbol::AbsolutePseudoSection)
772 return RHS_S;
773 if (RHS_S == MCSymbol::AbsolutePseudoSection)
774 return LHS_S;
775
776 // Otherwise, return the first non-null section.
777 return LHS_S ? LHS_S : RHS_S;
778 }
779 }
780
Craig Toppera2886c22012-02-07 05:05:23 +0000[diff] [blame]781 llvm_unreachable("Invalid assembly expression kind!");
Daniel Dunbardc3e4cc2011-04-29 18:00:03 +0000[diff] [blame]782}