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gerrit-public.fairphone.software / fp2-dev / platform / external / llvm / cab0a1933875935c717136d251e2af9749533ba8 / . / lib / MC / MCExpr.cpp
blob: 24412021f394e908b60a3c37a6fdeea83e171d7b [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
Daniel Dunbarff547842010-03-23 23:47:14 +0000[diff] [blame]10#define DEBUG_TYPE "mcexpr"
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]11#include "llvm/MC/MCExpr.h"
Daniel Dunbarff547842010-03-23 23:47:14 +0000[diff] [blame]12#include "llvm/ADT/Statistic.h"
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]13#include "llvm/ADT/StringSwitch.h"
Daniel Dunbar979ba5b2010-03-11 05:53:37 +0000[diff] [blame]14#include "llvm/MC/MCAsmLayout.h"
15#include "llvm/MC/MCAssembler.h"
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]16#include "llvm/MC/MCContext.h"
Craig Topperf1d0f772012-03-26 06:58:25 +0000[diff] [blame]17#include "llvm/MC/MCObjectWriter.h"
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]18#include "llvm/MC/MCSymbol.h"
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]19#include "llvm/MC/MCValue.h"
David Greene5d2bcb12010-01-05 01:28:07 +0000[diff] [blame]20#include "llvm/Support/Debug.h"
Chandler Carruth732f05c2012-01-10 18:08:01 +0000[diff] [blame]21#include "llvm/Support/ErrorHandling.h"
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]22#include "llvm/Support/raw_ostream.h"
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]23using namespace llvm;
24
Daniel Dunbarff547842010-03-23 23:47:14 +0000[diff] [blame]25namespace {
26namespace stats {
27STATISTIC(MCExprEvaluate, "Number of MCExpr evaluations");
28}
29}
30
Chris Lattner8cb9a3b2010-01-18 00:37:40 +0000[diff] [blame]31void MCExpr::print(raw_ostream &OS) const {
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]32 switch (getKind()) {
Chris Lattner5d917a82010-02-08 19:41:07 +0000[diff] [blame]33 case MCExpr::Target:
34 return cast<MCTargetExpr>(this)->PrintImpl(OS);
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]35 case MCExpr::Constant:
36 OS << cast<MCConstantExpr>(*this).getValue();
37 return;
38
Chris Lattnerd50c2b92009-09-08 23:20:50 +0000[diff] [blame]39 case MCExpr::SymbolRef: {
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]40 const MCSymbolRefExpr &SRE = cast<MCSymbolRefExpr>(*this);
41 const MCSymbol &Sym = SRE.getSymbol();
Chris Lattner1e61e692010-11-15 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 Lattner1e61e692010-11-15 02:46:57 +0000[diff] [blame]45 if (UseParens)
Chris Lattner10b318b2010-01-17 21:43:43 +0000[diff] [blame]46 OS << '(' << Sym << ')';
47 else
48 OS << Sym;
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]49
Logan Chien37c74612012-12-12 07:14:46 +0000[diff] [blame]50 if (SRE.getKind() == MCSymbolRefExpr::VK_ARM_NONE ||
51 SRE.getKind() == MCSymbolRefExpr::VK_ARM_PLT ||
Jim Grosbach2c4d5122010-11-10 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 Molloy34982572012-01-26 09:25:43 +0000[diff] [blame]56 SRE.getKind() == MCSymbolRefExpr::VK_ARM_GOTTPOFF ||
Anton Korobeynikov12cfa112012-11-09 20:20:12 +0000[diff] [blame]57 SRE.getKind() == MCSymbolRefExpr::VK_ARM_TARGET1 ||
Logan Chien37c74612012-12-12 07:14:46 +0000[diff] [blame]58 SRE.getKind() == MCSymbolRefExpr::VK_ARM_TARGET2 ||
59 SRE.getKind() == MCSymbolRefExpr::VK_ARM_PREL31)
Jim Grosbach637d89f2010-09-22 23:27:36 +0000[diff] [blame]60 OS << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
Ulrich Weigandedaa58e2013-05-23 22:26:41 +0000[diff] [blame]61 else if (SRE.getKind() != MCSymbolRefExpr::VK_None)
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]62 OS << '@' << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
63
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]64 return;
Chris Lattnerd50c2b92009-09-08 23:20:50 +0000[diff] [blame]65 }
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]66
67 case MCExpr::Unary: {
68 const MCUnaryExpr &UE = cast<MCUnaryExpr>(*this);
69 switch (UE.getOpcode()) {
Daniel Dunbar87392fd2009-08-31 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 Lattner8cb9a3b2010-01-18 00:37:40 +0000[diff] [blame]75 OS << *UE.getSubExpr();
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]76 return;
77 }
78
79 case MCExpr::Binary: {
80 const MCBinaryExpr &BE = cast<MCBinaryExpr>(*this);
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]81
Chris Lattnerbe73e8c2009-09-08 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 Lattner8cb9a3b2010-01-18 00:37:40 +0000[diff] [blame]84 OS << *BE.getLHS();
Chris Lattnerbe73e8c2009-09-08 06:34:07 +0000[diff] [blame]85 } else {
Chris Lattner8cb9a3b2010-01-18 00:37:40 +0000[diff] [blame]86 OS << '(' << *BE.getLHS() << ')';
Chris Lattnerbe73e8c2009-09-08 06:34:07 +0000[diff] [blame]87 }
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]88
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]89 switch (BE.getOpcode()) {
Chris Lattnerd19ceb92009-09-08 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 Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]98
Chris Lattnerd19ceb92009-09-08 06:37:35 +0000[diff] [blame]99 OS << '+';
100 break;
Daniel Dunbar87392fd2009-08-31 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 Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]119
Chris Lattnerbe73e8c2009-09-08 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 Lattner8cb9a3b2010-01-18 00:37:40 +0000[diff] [blame]122 OS << *BE.getRHS();
Chris Lattnerbe73e8c2009-09-08 06:34:07 +0000[diff] [blame]123 } else {
Chris Lattner8cb9a3b2010-01-18 00:37:40 +0000[diff] [blame]124 OS << '(' << *BE.getRHS() << ')';
Chris Lattnerbe73e8c2009-09-08 06:34:07 +0000[diff] [blame]125 }
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]126 return;
127 }
128 }
129
Craig Topper85814382012-02-07 05:05:23 +0000[diff] [blame]130 llvm_unreachable("Invalid expression kind!");
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]131}
132
Manman Ren286c4dc2012-09-12 05:06:18 +0000[diff] [blame]133#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]134void MCExpr::dump() const {
Chris Lattner8cb9a3b2010-01-18 00:37:40 +0000[diff] [blame]135 print(dbgs());
David Greene5d2bcb12010-01-05 01:28:07 +0000[diff] [blame]136 dbgs() << '\n';
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]137}
Manman Rencc77eec2012-09-06 19:55:56 +0000[diff] [blame]138#endif
Daniel Dunbar87392fd2009-08-31 08:07:33 +0000[diff] [blame]139
140/* *** */
141
Chris Lattner8b4ada22009-09-08 06:27:48 +0000[diff] [blame]142const MCBinaryExpr *MCBinaryExpr::Create(Opcode Opc, const MCExpr *LHS,
143 const MCExpr *RHS, MCContext &Ctx) {
Daniel Dunbar9643ac52009-08-31 08:07:22 +0000[diff] [blame]144 return new (Ctx) MCBinaryExpr(Opc, LHS, RHS);
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]145}
146
Chris Lattner8b4ada22009-09-08 06:27:48 +0000[diff] [blame]147const MCUnaryExpr *MCUnaryExpr::Create(Opcode Opc, const MCExpr *Expr,
148 MCContext &Ctx) {
Daniel Dunbar9643ac52009-08-31 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 Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]156/* *** */
157
Daniel Dunbar9643ac52009-08-31 08:07:22 +0000[diff] [blame]158const MCSymbolRefExpr *MCSymbolRefExpr::Create(const MCSymbol *Sym,
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]159 VariantKind Kind,
Daniel Dunbar9643ac52009-08-31 08:07:22 +0000[diff] [blame]160 MCContext &Ctx) {
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]161 return new (Ctx) MCSymbolRefExpr(Sym, Kind);
Daniel Dunbar9643ac52009-08-31 08:07:22 +0000[diff] [blame]162}
163
Daniel Dunbar4e815f82010-03-15 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 Lattner4f3e7aa2009-09-16 01:26:31 +0000[diff] [blame]167}
168
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]169StringRef MCSymbolRefExpr::getVariantKindName(VariantKind Kind) {
170 switch (Kind) {
Daniel Dunbar4e815f82010-03-15 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 Espindolaa0a2f872010-10-28 14:22:44 +0000[diff] [blame]180 case VK_GOTNTPOFF: return "GOTNTPOFF";
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]181 case VK_PLT: return "PLT";
182 case VK_TLSGD: return "TLSGD";
Rafael Espindolab4d17212010-10-28 15:02:40 +0000[diff] [blame]183 case VK_TLSLD: return "TLSLD";
Rafael Espindolaa264f722010-10-28 14:37:09 +0000[diff] [blame]184 case VK_TLSLDM: return "TLSLDM";
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]185 case VK_TPOFF: return "TPOFF";
Rafael Espindola0cf15d62010-10-28 14:48:59 +0000[diff] [blame]186 case VK_DTPOFF: return "DTPOFF";
Chris Lattner6135a962010-11-14 22:22:59 +0000[diff] [blame]187 case VK_TLVP: return "TLVP";
Benjamin Kramer42734cf2013-03-30 16:21:50 +0000[diff] [blame]188 case VK_SECREL: return "SECREL32";
Logan Chien37c74612012-12-12 07:14:46 +0000[diff] [blame]189 case VK_ARM_NONE: return "(NONE)";
Jim Grosbach637d89f2010-09-22 23:27:36 +0000[diff] [blame]190 case VK_ARM_PLT: return "(PLT)";
Jim Grosbach2c4d5122010-11-10 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 Grosbach4d088632010-11-17 19:30:11 +0000[diff] [blame]195 case VK_ARM_TLSGD: return "(tlsgd)";
James Molloy34982572012-01-26 09:25:43 +0000[diff] [blame]196 case VK_ARM_TARGET1: return "(target1)";
Anton Korobeynikov12cfa112012-11-09 20:20:12 +0000[diff] [blame]197 case VK_ARM_TARGET2: return "(target2)";
Logan Chien37c74612012-12-12 07:14:46 +0000[diff] [blame]198 case VK_ARM_PREL31: return "(prel31)";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]199 case VK_PPC_LO: return "l";
Ulrich Weigandd2849572013-06-21 14:42:49 +0000[diff] [blame]200 case VK_PPC_HI: return "h";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]201 case VK_PPC_HA: return "ha";
Ulrich Weigandf7c1ee72013-06-21 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 Weigand84656592013-06-20 22:39:42 +0000[diff] [blame]206 case VK_PPC_TOCBASE: return "tocbase";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]207 case VK_PPC_TOC: return "toc";
208 case VK_PPC_TOC_LO: return "toc@l";
Ulrich Weigandf8f87dc2013-06-21 14:43:10 +0000[diff] [blame]209 case VK_PPC_TOC_HI: return "toc@h";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]210 case VK_PPC_TOC_HA: return "toc@ha";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]211 case VK_PPC_TPREL: return "tprel";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]212 case VK_PPC_TPREL_LO: return "tprel@l";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]213 case VK_PPC_TPREL_HI: return "tprel@h";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]214 case VK_PPC_TPREL_HA: return "tprel@ha";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]215 case VK_PPC_TPREL_HIGHER: return "tprel@higher";
216 case VK_PPC_TPREL_HIGHERA: return "tprel@highera";
217 case VK_PPC_TPREL_HIGHEST: return "tprel@highest";
218 case VK_PPC_TPREL_HIGHESTA: return "tprel@highesta";
219 case VK_PPC_DTPREL: return "dtprel";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]220 case VK_PPC_DTPREL_LO: return "dtprel@l";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]221 case VK_PPC_DTPREL_HI: return "dtprel@h";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]222 case VK_PPC_DTPREL_HA: return "dtprel@ha";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]223 case VK_PPC_DTPREL_HIGHER: return "dtprel@higher";
224 case VK_PPC_DTPREL_HIGHERA: return "dtprel@highera";
225 case VK_PPC_DTPREL_HIGHEST: return "dtprel@highest";
226 case VK_PPC_DTPREL_HIGHESTA: return "dtprel@highesta";
227 case VK_PPC_GOT_TPREL: return "got@tprel";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]228 case VK_PPC_GOT_TPREL_LO: return "got@tprel@l";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]229 case VK_PPC_GOT_TPREL_HI: return "got@tprel@h";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]230 case VK_PPC_GOT_TPREL_HA: return "got@tprel@ha";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]231 case VK_PPC_GOT_DTPREL: return "got@dtprel";
232 case VK_PPC_GOT_DTPREL_LO: return "got@dtprel@l";
233 case VK_PPC_GOT_DTPREL_HI: return "got@dtprel@h";
234 case VK_PPC_GOT_DTPREL_HA: return "got@dtprel@ha";
Bill Schmidtd7802bf2012-12-04 16:18:08 +0000[diff] [blame]235 case VK_PPC_TLS: return "tls";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]236 case VK_PPC_GOT_TLSGD: return "got@tlsgd";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]237 case VK_PPC_GOT_TLSGD_LO: return "got@tlsgd@l";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]238 case VK_PPC_GOT_TLSGD_HI: return "got@tlsgd@h";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]239 case VK_PPC_GOT_TLSGD_HA: return "got@tlsgd@ha";
Bill Schmidt57ac1f42012-12-11 20:30:11 +0000[diff] [blame]240 case VK_PPC_TLSGD: return "tlsgd";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]241 case VK_PPC_GOT_TLSLD: return "got@tlsld";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]242 case VK_PPC_GOT_TLSLD_LO: return "got@tlsld@l";
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]243 case VK_PPC_GOT_TLSLD_HI: return "got@tlsld@h";
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]244 case VK_PPC_GOT_TLSLD_HA: return "got@tlsld@ha";
Bill Schmidt349c2782012-12-12 19:29:35 +0000[diff] [blame]245 case VK_PPC_TLSLD: return "tlsld";
Akira Hatanakabc249852011-12-22 01:05:17 +0000[diff] [blame]246 case VK_Mips_GPREL: return "GPREL";
247 case VK_Mips_GOT_CALL: return "GOT_CALL";
248 case VK_Mips_GOT16: return "GOT16";
249 case VK_Mips_GOT: return "GOT";
250 case VK_Mips_ABS_HI: return "ABS_HI";
251 case VK_Mips_ABS_LO: return "ABS_LO";
252 case VK_Mips_TLSGD: return "TLSGD";
253 case VK_Mips_TLSLDM: return "TLSLDM";
254 case VK_Mips_DTPREL_HI: return "DTPREL_HI";
255 case VK_Mips_DTPREL_LO: return "DTPREL_LO";
256 case VK_Mips_GOTTPREL: return "GOTTPREL";
257 case VK_Mips_TPREL_HI: return "TPREL_HI";
258 case VK_Mips_TPREL_LO: return "TPREL_LO";
259 case VK_Mips_GPOFF_HI: return "GPOFF_HI";
260 case VK_Mips_GPOFF_LO: return "GPOFF_LO";
261 case VK_Mips_GOT_DISP: return "GOT_DISP";
262 case VK_Mips_GOT_PAGE: return "GOT_PAGE";
263 case VK_Mips_GOT_OFST: return "GOT_OFST";
Akira Hatanakab7dd9fc2012-07-21 02:15:19 +0000[diff] [blame]264 case VK_Mips_HIGHER: return "HIGHER";
265 case VK_Mips_HIGHEST: return "HIGHEST";
Akira Hatanakae3904342012-11-21 19:50:22 +0000[diff] [blame]266 case VK_Mips_GOT_HI16: return "GOT_HI16";
267 case VK_Mips_GOT_LO16: return "GOT_LO16";
268 case VK_Mips_CALL_HI16: return "CALL_HI16";
269 case VK_Mips_CALL_LO16: return "CALL_LO16";
Nico Rieck18d49ac2013-04-10 23:28:17 +0000[diff] [blame]270 case VK_COFF_IMGREL32: return "IMGREL32";
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]271 }
Chandler Carruth732f05c2012-01-10 18:08:01 +0000[diff] [blame]272 llvm_unreachable("Invalid variant kind");
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]273}
274
275MCSymbolRefExpr::VariantKind
276MCSymbolRefExpr::getVariantKindForName(StringRef Name) {
277 return StringSwitch<VariantKind>(Name)
278 .Case("GOT", VK_GOT)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]279 .Case("got", VK_GOT)
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]280 .Case("GOTOFF", VK_GOTOFF)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]281 .Case("gotoff", VK_GOTOFF)
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]282 .Case("GOTPCREL", VK_GOTPCREL)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]283 .Case("gotpcrel", VK_GOTPCREL)
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]284 .Case("GOTTPOFF", VK_GOTTPOFF)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]285 .Case("gottpoff", VK_GOTTPOFF)
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]286 .Case("INDNTPOFF", VK_INDNTPOFF)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]287 .Case("indntpoff", VK_INDNTPOFF)
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]288 .Case("NTPOFF", VK_NTPOFF)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]289 .Case("ntpoff", VK_NTPOFF)
Rafael Espindolaa0a2f872010-10-28 14:22:44 +0000[diff] [blame]290 .Case("GOTNTPOFF", VK_GOTNTPOFF)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]291 .Case("gotntpoff", VK_GOTNTPOFF)
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]292 .Case("PLT", VK_PLT)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]293 .Case("plt", VK_PLT)
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]294 .Case("TLSGD", VK_TLSGD)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]295 .Case("tlsgd", VK_TLSGD)
Rafael Espindolab4d17212010-10-28 15:02:40 +0000[diff] [blame]296 .Case("TLSLD", VK_TLSLD)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]297 .Case("tlsld", VK_TLSLD)
Rafael Espindolaa264f722010-10-28 14:37:09 +0000[diff] [blame]298 .Case("TLSLDM", VK_TLSLDM)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]299 .Case("tlsldm", VK_TLSLDM)
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]300 .Case("TPOFF", VK_TPOFF)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]301 .Case("tpoff", VK_TPOFF)
Rafael Espindola0cf15d62010-10-28 14:48:59 +0000[diff] [blame]302 .Case("DTPOFF", VK_DTPOFF)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]303 .Case("dtpoff", VK_DTPOFF)
Eric Christopher96ac5152010-05-26 00:02:12 +0000[diff] [blame]304 .Case("TLVP", VK_TLVP)
Rafael Espindola54104db2011-01-23 16:11:25 +0000[diff] [blame]305 .Case("tlvp", VK_TLVP)
Nico Rieck18d49ac2013-04-10 23:28:17 +0000[diff] [blame]306 .Case("IMGREL", VK_COFF_IMGREL32)
307 .Case("imgrel", VK_COFF_IMGREL32)
Rafael Espindola93d0b062013-04-25 19:27:05 +0000[diff] [blame]308 .Case("SECREL32", VK_SECREL)
309 .Case("secrel32", VK_SECREL)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]310 .Case("L", VK_PPC_LO)
311 .Case("l", VK_PPC_LO)
Ulrich Weigandd2849572013-06-21 14:42:49 +0000[diff] [blame]312 .Case("H", VK_PPC_HI)
313 .Case("h", VK_PPC_HI)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]314 .Case("HA", VK_PPC_HA)
315 .Case("ha", VK_PPC_HA)
Ulrich Weigandf7c1ee72013-06-21 14:43:42 +0000[diff] [blame]316 .Case("HIGHER", VK_PPC_HIGHER)
317 .Case("higher", VK_PPC_HIGHER)
318 .Case("HIGHERA", VK_PPC_HIGHERA)
319 .Case("highera", VK_PPC_HIGHERA)
320 .Case("HIGHEST", VK_PPC_HIGHEST)
321 .Case("highest", VK_PPC_HIGHEST)
322 .Case("HIGHESTA", VK_PPC_HIGHESTA)
323 .Case("highesta", VK_PPC_HIGHESTA)
Ulrich Weigand84656592013-06-20 22:39:42 +0000[diff] [blame]324 .Case("TOCBASE", VK_PPC_TOCBASE)
325 .Case("tocbase", VK_PPC_TOCBASE)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]326 .Case("TOC", VK_PPC_TOC)
327 .Case("toc", VK_PPC_TOC)
328 .Case("TOC@L", VK_PPC_TOC_LO)
329 .Case("toc@l", VK_PPC_TOC_LO)
Ulrich Weigandf8f87dc2013-06-21 14:43:10 +0000[diff] [blame]330 .Case("TOC@H", VK_PPC_TOC_HI)
331 .Case("toc@h", VK_PPC_TOC_HI)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]332 .Case("TOC@HA", VK_PPC_TOC_HA)
333 .Case("toc@ha", VK_PPC_TOC_HA)
Ulrich Weiganda7e5e6b2013-05-03 19:52:35 +0000[diff] [blame]334 .Case("TLS", VK_PPC_TLS)
335 .Case("tls", VK_PPC_TLS)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]336 .Case("TPREL", VK_PPC_TPREL)
337 .Case("tprel", VK_PPC_TPREL)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]338 .Case("TPREL@L", VK_PPC_TPREL_LO)
339 .Case("tprel@l", VK_PPC_TPREL_LO)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]340 .Case("TPREL@H", VK_PPC_TPREL_HI)
341 .Case("tprel@h", VK_PPC_TPREL_HI)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]342 .Case("TPREL@HA", VK_PPC_TPREL_HA)
343 .Case("tprel@ha", VK_PPC_TPREL_HA)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]344 .Case("TPREL@HIGHER", VK_PPC_TPREL_HIGHER)
345 .Case("tprel@higher", VK_PPC_TPREL_HIGHER)
346 .Case("TPREL@HIGHERA", VK_PPC_TPREL_HIGHERA)
347 .Case("tprel@highera", VK_PPC_TPREL_HIGHERA)
348 .Case("TPREL@HIGHEST", VK_PPC_TPREL_HIGHEST)
349 .Case("tprel@highest", VK_PPC_TPREL_HIGHEST)
350 .Case("TPREL@HIGHESTA", VK_PPC_TPREL_HIGHESTA)
351 .Case("tprel@highesta", VK_PPC_TPREL_HIGHESTA)
352 .Case("DTPREL", VK_PPC_DTPREL)
353 .Case("dtprel", VK_PPC_DTPREL)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]354 .Case("DTPREL@L", VK_PPC_DTPREL_LO)
355 .Case("dtprel@l", VK_PPC_DTPREL_LO)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]356 .Case("DTPREL@H", VK_PPC_DTPREL_HI)
357 .Case("dtprel@h", VK_PPC_DTPREL_HI)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]358 .Case("DTPREL@HA", VK_PPC_DTPREL_HA)
359 .Case("dtprel@ha", VK_PPC_DTPREL_HA)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]360 .Case("DTPREL@HIGHER", VK_PPC_DTPREL_HIGHER)
361 .Case("dtprel@higher", VK_PPC_DTPREL_HIGHER)
362 .Case("DTPREL@HIGHERA", VK_PPC_DTPREL_HIGHERA)
363 .Case("dtprel@highera", VK_PPC_DTPREL_HIGHERA)
364 .Case("DTPREL@HIGHEST", VK_PPC_DTPREL_HIGHEST)
365 .Case("dtprel@highest", VK_PPC_DTPREL_HIGHEST)
366 .Case("DTPREL@HIGHESTA", VK_PPC_DTPREL_HIGHESTA)
367 .Case("dtprel@highesta", VK_PPC_DTPREL_HIGHESTA)
368 .Case("GOT@TPREL", VK_PPC_GOT_TPREL)
369 .Case("got@tprel", VK_PPC_GOT_TPREL)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]370 .Case("GOT@TPREL@L", VK_PPC_GOT_TPREL_LO)
371 .Case("got@tprel@l", VK_PPC_GOT_TPREL_LO)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]372 .Case("GOT@TPREL@H", VK_PPC_GOT_TPREL_HI)
373 .Case("got@tprel@h", VK_PPC_GOT_TPREL_HI)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]374 .Case("GOT@TPREL@HA", VK_PPC_GOT_TPREL_HA)
375 .Case("got@tprel@ha", VK_PPC_GOT_TPREL_HA)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]376 .Case("GOT@DTPREL", VK_PPC_GOT_DTPREL)
377 .Case("got@dtprel", VK_PPC_GOT_DTPREL)
378 .Case("GOT@DTPREL@L", VK_PPC_GOT_DTPREL_LO)
379 .Case("got@dtprel@l", VK_PPC_GOT_DTPREL_LO)
380 .Case("GOT@DTPREL@H", VK_PPC_GOT_DTPREL_HI)
381 .Case("got@dtprel@h", VK_PPC_GOT_DTPREL_HI)
382 .Case("GOT@DTPREL@HA", VK_PPC_GOT_DTPREL_HA)
383 .Case("got@dtprel@ha", VK_PPC_GOT_DTPREL_HA)
384 .Case("GOT@TLSGD", VK_PPC_GOT_TLSGD)
385 .Case("got@tlsgd", VK_PPC_GOT_TLSGD)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]386 .Case("GOT@TLSGD@L", VK_PPC_GOT_TLSGD_LO)
387 .Case("got@tlsgd@l", VK_PPC_GOT_TLSGD_LO)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]388 .Case("GOT@TLSGD@H", VK_PPC_GOT_TLSGD_HI)
389 .Case("got@tlsgd@h", VK_PPC_GOT_TLSGD_HI)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]390 .Case("GOT@TLSGD@HA", VK_PPC_GOT_TLSGD_HA)
391 .Case("got@tlsgd@ha", VK_PPC_GOT_TLSGD_HA)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]392 .Case("GOT@TLSLD", VK_PPC_GOT_TLSLD)
393 .Case("got@tlsld", VK_PPC_GOT_TLSLD)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]394 .Case("GOT@TLSLD@L", VK_PPC_GOT_TLSLD_LO)
395 .Case("got@tlsld@l", VK_PPC_GOT_TLSLD_LO)
Ulrich Weigandcab0a192013-06-21 14:44:15 +0000[diff] [blame^]396 .Case("GOT@TLSLD@H", VK_PPC_GOT_TLSLD_HI)
397 .Case("got@tlsld@h", VK_PPC_GOT_TLSLD_HI)
Ulrich Weigand92cfa612013-06-21 14:42:20 +0000[diff] [blame]398 .Case("GOT@TLSLD@HA", VK_PPC_GOT_TLSLD_HA)
399 .Case("got@tlsld@ha", VK_PPC_GOT_TLSLD_HA)
Daniel Dunbar4e815f82010-03-15 23:51:06 +0000[diff] [blame]400 .Default(VK_Invalid);
401}
402
403/* *** */
404
Craig Topper4bb51cc2012-09-26 06:36:36 +0000[diff] [blame]405void MCTargetExpr::anchor() {}
Chris Lattner4f3e7aa2009-09-16 01:26:31 +0000[diff] [blame]406
Daniel Dunbar9643ac52009-08-31 08:07:22 +0000[diff] [blame]407/* *** */
408
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]409bool MCExpr::EvaluateAsAbsolute(int64_t &Res) const {
410 return EvaluateAsAbsolute(Res, 0, 0, 0);
411}
412
413bool MCExpr::EvaluateAsAbsolute(int64_t &Res,
414 const MCAsmLayout &Layout) const {
415 return EvaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, 0);
416}
417
418bool MCExpr::EvaluateAsAbsolute(int64_t &Res,
419 const MCAsmLayout &Layout,
420 const SectionAddrMap &Addrs) const {
421 return EvaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, &Addrs);
422}
423
424bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAssembler &Asm) const {
425 return EvaluateAsAbsolute(Res, &Asm, 0, 0);
426}
427
428bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
429 const MCAsmLayout *Layout,
Rafael Espindola85f2ecc2010-12-07 00:27:36 +0000[diff] [blame]430 const SectionAddrMap *Addrs) const {
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]431 MCValue Value;
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]432
Daniel Dunbaref6e96f2010-03-23 23:47:07 +0000[diff] [blame]433 // Fast path constants.
434 if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(this)) {
435 Res = CE->getValue();
436 return true;
437 }
438
Rafael Espindola3f037ef2010-12-18 04:19:20 +0000[diff] [blame]439 // FIXME: The use if InSet = Addrs is a hack. Setting InSet causes us
440 // absolutize differences across sections and that is what the MachO writer
441 // uses Addrs for.
Rafael Espindola10b6d332010-12-22 22:16:24 +0000[diff] [blame]442 bool IsRelocatable =
443 EvaluateAsRelocatableImpl(Value, Asm, Layout, Addrs, /*InSet*/ Addrs);
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]444
Rafael Espindola10b6d332010-12-22 22:16:24 +0000[diff] [blame]445 // Record the current value.
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]446 Res = Value.getConstant();
Rafael Espindola10b6d332010-12-22 22:16:24 +0000[diff] [blame]447
448 return IsRelocatable && Value.isAbsolute();
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]449}
450
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]451/// \brief Helper method for \see EvaluateSymbolAdd().
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]452static void AttemptToFoldSymbolOffsetDifference(const MCAssembler *Asm,
453 const MCAsmLayout *Layout,
454 const SectionAddrMap *Addrs,
455 bool InSet,
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]456 const MCSymbolRefExpr *&A,
457 const MCSymbolRefExpr *&B,
458 int64_t &Addend) {
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]459 if (!A || !B)
460 return;
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]461
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]462 const MCSymbol &SA = A->getSymbol();
463 const MCSymbol &SB = B->getSymbol();
464
465 if (SA.isUndefined() || SB.isUndefined())
466 return;
467
468 if (!Asm->getWriter().IsSymbolRefDifferenceFullyResolved(*Asm, A, B, InSet))
469 return;
470
471 MCSymbolData &AD = Asm->getSymbolData(SA);
472 MCSymbolData &BD = Asm->getSymbolData(SB);
473
474 if (AD.getFragment() == BD.getFragment()) {
475 Addend += (AD.getOffset() - BD.getOffset());
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]476
Owen Andersonce3a1ba2011-03-21 23:13:43 +0000[diff] [blame]477 // Pointers to Thumb symbols need to have their low-bit set to allow
478 // for interworking.
479 if (Asm->isThumbFunc(&SA))
480 Addend |= 1;
481
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]482 // Clear the symbol expr pointers to indicate we have folded these
483 // operands.
484 A = B = 0;
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]485 return;
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]486 }
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]487
488 if (!Layout)
489 return;
490
491 const MCSectionData &SecA = *AD.getFragment()->getParent();
492 const MCSectionData &SecB = *BD.getFragment()->getParent();
493
494 if ((&SecA != &SecB) && !Addrs)
495 return;
496
497 // Eagerly evaluate.
498 Addend += (Layout->getSymbolOffset(&Asm->getSymbolData(A->getSymbol())) -
499 Layout->getSymbolOffset(&Asm->getSymbolData(B->getSymbol())));
500 if (Addrs && (&SecA != &SecB))
501 Addend += (Addrs->lookup(&SecA) - Addrs->lookup(&SecB));
502
Jim Grosbach0db12412012-02-24 05:12:18 +0000[diff] [blame]503 // Pointers to Thumb symbols need to have their low-bit set to allow
504 // for interworking.
505 if (Asm->isThumbFunc(&SA))
506 Addend |= 1;
507
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]508 // Clear the symbol expr pointers to indicate we have folded these
509 // operands.
510 A = B = 0;
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]511}
512
Daniel Dunbardd18e282010-12-16 18:36:25 +0000[diff] [blame]513/// \brief Evaluate the result of an add between (conceptually) two MCValues.
514///
515/// This routine conceptually attempts to construct an MCValue:
516/// Result = (Result_A - Result_B + Result_Cst)
517/// from two MCValue's LHS and RHS where
518/// Result = LHS + RHS
519/// and
520/// Result = (LHS_A - LHS_B + LHS_Cst) + (RHS_A - RHS_B + RHS_Cst).
521///
522/// This routine attempts to aggresively fold the operands such that the result
523/// is representable in an MCValue, but may not always succeed.
524///
525/// \returns True on success, false if the result is not representable in an
526/// MCValue.
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]527
528/// NOTE: It is really important to have both the Asm and Layout arguments.
529/// They might look redundant, but this function can be used before layout
530/// is done (see the object streamer for example) and having the Asm argument
Rafael Espindolaf705a7e2010-12-18 04:01:45 +0000[diff] [blame]531/// lets us avoid relaxations early.
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]532static bool EvaluateSymbolicAdd(const MCAssembler *Asm,
533 const MCAsmLayout *Layout,
Rafael Espindola85f2ecc2010-12-07 00:27:36 +0000[diff] [blame]534 const SectionAddrMap *Addrs,
Rafael Espindola32a006e2010-12-03 00:55:40 +0000[diff] [blame]535 bool InSet,
Rafael Espindolaf230df92010-10-16 18:23:53 +0000[diff] [blame]536 const MCValue &LHS,const MCSymbolRefExpr *RHS_A,
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]537 const MCSymbolRefExpr *RHS_B, int64_t RHS_Cst,
Daniel Dunbar35976042009-06-30 02:08:27 +0000[diff] [blame]538 MCValue &Res) {
Daniel Dunbarf2ed62d2010-12-17 01:07:20 +0000[diff] [blame]539 // FIXME: This routine (and other evaluation parts) are *incredibly* sloppy
540 // about dealing with modifiers. This will ultimately bite us, one day.
541 const MCSymbolRefExpr *LHS_A = LHS.getSymA();
542 const MCSymbolRefExpr *LHS_B = LHS.getSymB();
543 int64_t LHS_Cst = LHS.getConstant();
544
545 // Fold the result constant immediately.
546 int64_t Result_Cst = LHS_Cst + RHS_Cst;
547
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]548 assert((!Layout || Asm) &&
549 "Must have an assembler object if layout is given!");
550
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]551 // If we have a layout, we can fold resolved differences.
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]552 if (Asm) {
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]553 // First, fold out any differences which are fully resolved. By
554 // reassociating terms in
555 // Result = (LHS_A - LHS_B + LHS_Cst) + (RHS_A - RHS_B + RHS_Cst).
556 // we have the four possible differences:
557 // (LHS_A - LHS_B),
558 // (LHS_A - RHS_B),
559 // (RHS_A - LHS_B),
560 // (RHS_A - RHS_B).
Chris Lattner7a2bdde2011-04-15 05:18:47 +0000[diff] [blame]561 // Since we are attempting to be as aggressive as possible about folding, we
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]562 // attempt to evaluate each possible alternative.
Rafael Espindolac5b0e442010-12-19 04:18:56 +0000[diff] [blame]563 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, LHS_A, LHS_B,
564 Result_Cst);
565 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, LHS_A, RHS_B,
566 Result_Cst);
567 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, RHS_A, LHS_B,
568 Result_Cst);
569 AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, RHS_A, RHS_B,
570 Result_Cst);
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]571 }
572
Daniel Dunbarf2ed62d2010-12-17 01:07:20 +0000[diff] [blame]573 // We can't represent the addition or subtraction of two symbols.
574 if ((LHS_A && RHS_A) || (LHS_B && RHS_B))
Daniel Dunbar35976042009-06-30 02:08:27 +0000[diff] [blame]575 return false;
576
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]577 // At this point, we have at most one additive symbol and one subtractive
578 // symbol -- find them.
Daniel Dunbarf2ed62d2010-12-17 01:07:20 +0000[diff] [blame]579 const MCSymbolRefExpr *A = LHS_A ? LHS_A : RHS_A;
580 const MCSymbolRefExpr *B = LHS_B ? LHS_B : RHS_B;
Daniel Dunbar17304b32010-12-17 05:50:33 +0000[diff] [blame]581
582 // If we have a negated symbol, then we must have also have a non-negated
583 // symbol in order to encode the expression.
584 if (B && !A)
585 return false;
Rafael Espindolaf230df92010-10-16 18:23:53 +0000[diff] [blame]586
Daniel Dunbarf2ed62d2010-12-17 01:07:20 +0000[diff] [blame]587 Res = MCValue::get(A, B, Result_Cst);
Daniel Dunbar35976042009-06-30 02:08:27 +0000[diff] [blame]588 return true;
589}
590
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]591bool MCExpr::EvaluateAsRelocatable(MCValue &Res,
Rafael Espindola33a38a12010-12-22 16:11:57 +0000[diff] [blame]592 const MCAsmLayout &Layout) const {
593 return EvaluateAsRelocatableImpl(Res, &Layout.getAssembler(), &Layout,
594 0, false);
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]595}
596
Rafael Espindolaf230df92010-10-16 18:23:53 +0000[diff] [blame]597bool MCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]598 const MCAssembler *Asm,
Rafael Espindolaf230df92010-10-16 18:23:53 +0000[diff] [blame]599 const MCAsmLayout *Layout,
Rafael Espindola85f2ecc2010-12-07 00:27:36 +0000[diff] [blame]600 const SectionAddrMap *Addrs,
Rafael Espindolaf230df92010-10-16 18:23:53 +0000[diff] [blame]601 bool InSet) const {
Daniel Dunbarff547842010-03-23 23:47:14 +0000[diff] [blame]602 ++stats::MCExprEvaluate;
603
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]604 switch (getKind()) {
Chris Lattner5d917a82010-02-08 19:41:07 +0000[diff] [blame]605 case Target:
Daniel Dunbarf82f4492010-03-11 02:28:59 +0000[diff] [blame]606 return cast<MCTargetExpr>(this)->EvaluateAsRelocatableImpl(Res, Layout);
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]607
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]608 case Constant:
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]609 Res = MCValue::get(cast<MCConstantExpr>(this)->getValue());
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]610 return true;
611
612 case SymbolRef: {
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]613 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
614 const MCSymbol &Sym = SRE->getSymbol();
Daniel Dunbar7c3600d2009-10-16 01:33:57 +0000[diff] [blame]615
616 // Evaluate recursively if this is a variable.
Rafael Espindola94ed5fc2010-11-15 16:33:49 +0000[diff] [blame]617 if (Sym.isVariable() && SRE->getKind() == MCSymbolRefExpr::VK_None) {
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]618 bool Ret = Sym.getVariableValue()->EvaluateAsRelocatableImpl(Res, Asm,
619 Layout,
620 Addrs,
621 true);
Rafael Espindola94ed5fc2010-11-15 16:33:49 +0000[diff] [blame]622 // If we failed to simplify this to a constant, let the target
623 // handle it.
624 if (Ret && !Res.getSymA() && !Res.getSymB())
625 return true;
626 }
Daniel Dunbar7c3600d2009-10-16 01:33:57 +0000[diff] [blame]627
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]628 Res = MCValue::get(SRE, 0, 0);
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]629 return true;
630 }
631
632 case Unary: {
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]633 const MCUnaryExpr *AUE = cast<MCUnaryExpr>(this);
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]634 MCValue Value;
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]635
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]636 if (!AUE->getSubExpr()->EvaluateAsRelocatableImpl(Value, Asm, Layout,
Rafael Espindola85f2ecc2010-12-07 00:27:36 +0000[diff] [blame]637 Addrs, InSet))
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]638 return false;
639
640 switch (AUE->getOpcode()) {
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]641 case MCUnaryExpr::LNot:
Daniel Dunbar80f62d02009-07-01 06:48:00 +0000[diff] [blame]642 if (!Value.isAbsolute())
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]643 return false;
644 Res = MCValue::get(!Value.getConstant());
645 break;
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]646 case MCUnaryExpr::Minus:
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]647 /// -(a - b + const) ==> (b - a - const)
Daniel Dunbarb27a41b2009-08-11 17:47:52 +0000[diff] [blame]648 if (Value.getSymA() && !Value.getSymB())
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]649 return false;
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]650 Res = MCValue::get(Value.getSymB(), Value.getSymA(),
651 -Value.getConstant());
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]652 break;
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]653 case MCUnaryExpr::Not:
Daniel Dunbar80f62d02009-07-01 06:48:00 +0000[diff] [blame]654 if (!Value.isAbsolute())
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]655 return false;
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]656 Res = MCValue::get(~Value.getConstant());
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]657 break;
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]658 case MCUnaryExpr::Plus:
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]659 Res = Value;
660 break;
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]661 }
662
663 return true;
664 }
665
666 case Binary: {
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]667 const MCBinaryExpr *ABE = cast<MCBinaryExpr>(this);
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]668 MCValue LHSValue, RHSValue;
Daniel Dunbar9a1d2002010-03-18 00:59:10 +0000[diff] [blame]669
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]670 if (!ABE->getLHS()->EvaluateAsRelocatableImpl(LHSValue, Asm, Layout,
Rafael Espindola85f2ecc2010-12-07 00:27:36 +0000[diff] [blame]671 Addrs, InSet) ||
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]672 !ABE->getRHS()->EvaluateAsRelocatableImpl(RHSValue, Asm, Layout,
Rafael Espindola85f2ecc2010-12-07 00:27:36 +0000[diff] [blame]673 Addrs, InSet))
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]674 return false;
675
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]676 // We only support a few operations on non-constant expressions, handle
677 // those first.
Daniel Dunbar80f62d02009-07-01 06:48:00 +0000[diff] [blame]678 if (!LHSValue.isAbsolute() || !RHSValue.isAbsolute()) {
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]679 switch (ABE->getOpcode()) {
680 default:
681 return false;
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]682 case MCBinaryExpr::Sub:
Daniel Dunbar35976042009-06-30 02:08:27 +0000[diff] [blame]683 // Negate RHS and add.
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]684 return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
Daniel Dunbar35976042009-06-30 02:08:27 +0000[diff] [blame]685 RHSValue.getSymB(), RHSValue.getSymA(),
686 -RHSValue.getConstant(),
687 Res);
688
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]689 case MCBinaryExpr::Add:
Rafael Espindolad0764822010-12-18 03:57:21 +0000[diff] [blame]690 return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
Daniel Dunbar35976042009-06-30 02:08:27 +0000[diff] [blame]691 RHSValue.getSymA(), RHSValue.getSymB(),
692 RHSValue.getConstant(),
693 Res);
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]694 }
695 }
696
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]697 // FIXME: We need target hooks for the evaluation. It may be limited in
Dan Gohman036c1302010-02-08 23:58:47 +0000[diff] [blame]698 // width, and gas defines the result of comparisons and right shifts
699 // differently from Apple as.
Daniel Dunbarb79742c2009-06-30 16:02:47 +0000[diff] [blame]700 int64_t LHS = LHSValue.getConstant(), RHS = RHSValue.getConstant();
701 int64_t Result = 0;
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]702 switch (ABE->getOpcode()) {
Daniel Dunbar28c251b2009-08-31 08:06:59 +0000[diff] [blame]703 case MCBinaryExpr::Add: Result = LHS + RHS; break;
704 case MCBinaryExpr::And: Result = LHS & RHS; break;
705 case MCBinaryExpr::Div: Result = LHS / RHS; break;
706 case MCBinaryExpr::EQ: Result = LHS == RHS; break;
707 case MCBinaryExpr::GT: Result = LHS > RHS; break;
708 case MCBinaryExpr::GTE: Result = LHS >= RHS; break;
709 case MCBinaryExpr::LAnd: Result = LHS && RHS; break;
710 case MCBinaryExpr::LOr: Result = LHS || RHS; break;
711 case MCBinaryExpr::LT: Result = LHS < RHS; break;
712 case MCBinaryExpr::LTE: Result = LHS <= RHS; break;
713 case MCBinaryExpr::Mod: Result = LHS % RHS; break;
714 case MCBinaryExpr::Mul: Result = LHS * RHS; break;
715 case MCBinaryExpr::NE: Result = LHS != RHS; break;
716 case MCBinaryExpr::Or: Result = LHS | RHS; break;
717 case MCBinaryExpr::Shl: Result = LHS << RHS; break;
718 case MCBinaryExpr::Shr: Result = LHS >> RHS; break;
719 case MCBinaryExpr::Sub: Result = LHS - RHS; break;
720 case MCBinaryExpr::Xor: Result = LHS ^ RHS; break;
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]721 }
722
Daniel Dunbar15d17072009-06-30 01:49:52 +0000[diff] [blame]723 Res = MCValue::get(Result);
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]724 return true;
725 }
726 }
Daniel Dunbarfc6877a2009-06-29 20:40:36 +0000[diff] [blame]727
Craig Topper85814382012-02-07 05:05:23 +0000[diff] [blame]728 llvm_unreachable("Invalid assembly expression kind!");
Daniel Dunbar9643ac52009-08-31 08:07:22 +0000[diff] [blame]729}
Daniel Dunbar0eab5c42011-04-29 18:00:03 +0000[diff] [blame]730
731const MCSection *MCExpr::FindAssociatedSection() const {
732 switch (getKind()) {
733 case Target:
734 // We never look through target specific expressions.
735 return cast<MCTargetExpr>(this)->FindAssociatedSection();
736
737 case Constant:
738 return MCSymbol::AbsolutePseudoSection;
739
740 case SymbolRef: {
741 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
742 const MCSymbol &Sym = SRE->getSymbol();
743
744 if (Sym.isDefined())
745 return &Sym.getSection();
746
747 return 0;
748 }
749
750 case Unary:
751 return cast<MCUnaryExpr>(this)->getSubExpr()->FindAssociatedSection();
752
753 case Binary: {
754 const MCBinaryExpr *BE = cast<MCBinaryExpr>(this);
755 const MCSection *LHS_S = BE->getLHS()->FindAssociatedSection();
756 const MCSection *RHS_S = BE->getRHS()->FindAssociatedSection();
757
758 // If either section is absolute, return the other.
759 if (LHS_S == MCSymbol::AbsolutePseudoSection)
760 return RHS_S;
761 if (RHS_S == MCSymbol::AbsolutePseudoSection)
762 return LHS_S;
763
764 // Otherwise, return the first non-null section.
765 return LHS_S ? LHS_S : RHS_S;
766 }
767 }
768
Craig Topper85814382012-02-07 05:05:23 +0000[diff] [blame]769 llvm_unreachable("Invalid assembly expression kind!");
Daniel Dunbar0eab5c42011-04-29 18:00:03 +0000[diff] [blame]770}