2009-08-31 08:06:59 +00:00
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//===- MCExpr.cpp - Assembly Level Expression Implementation --------------===//
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2009-06-29 20:40:36 +00:00
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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2010-03-23 23:47:14 +00:00
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#define DEBUG_TYPE "mcexpr"
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2009-08-31 08:06:59 +00:00
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#include "llvm/MC/MCExpr.h"
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2010-03-23 23:47:14 +00:00
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#include "llvm/ADT/Statistic.h"
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2010-03-15 23:51:06 +00:00
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#include "llvm/ADT/StringSwitch.h"
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2010-03-11 05:53:37 +00:00
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#include "llvm/MC/MCAsmLayout.h"
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#include "llvm/MC/MCAssembler.h"
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2009-06-29 20:40:36 +00:00
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#include "llvm/MC/MCContext.h"
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2012-03-26 06:58:25 +00:00
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#include "llvm/MC/MCObjectWriter.h"
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2009-06-30 01:49:52 +00:00
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#include "llvm/MC/MCSymbol.h"
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2009-06-29 20:40:36 +00:00
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#include "llvm/MC/MCValue.h"
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2010-01-05 01:28:07 +00:00
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#include "llvm/Support/Debug.h"
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2012-01-10 18:08:01 +00:00
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#include "llvm/Support/ErrorHandling.h"
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2009-08-31 08:07:33 +00:00
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#include "llvm/Support/raw_ostream.h"
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2009-06-29 20:40:36 +00:00
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using namespace llvm;
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2010-03-23 23:47:14 +00:00
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namespace {
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namespace stats {
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STATISTIC(MCExprEvaluate, "Number of MCExpr evaluations");
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}
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}
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2010-01-18 00:37:40 +00:00
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void MCExpr::print(raw_ostream &OS) const {
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2009-08-31 08:07:33 +00:00
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switch (getKind()) {
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2010-02-08 19:41:07 +00:00
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case MCExpr::Target:
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return cast<MCTargetExpr>(this)->PrintImpl(OS);
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2009-08-31 08:07:33 +00:00
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case MCExpr::Constant:
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OS << cast<MCConstantExpr>(*this).getValue();
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return;
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2009-09-08 23:20:50 +00:00
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case MCExpr::SymbolRef: {
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2010-03-15 23:51:06 +00:00
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const MCSymbolRefExpr &SRE = cast<MCSymbolRefExpr>(*this);
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const MCSymbol &Sym = SRE.getSymbol();
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2010-11-15 02:46:57 +00:00
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// Parenthesize names that start with $ so that they don't look like
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// absolute names.
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bool UseParens = Sym.getName()[0] == '$';
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if (UseParens)
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2010-01-17 21:43:43 +00:00
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OS << '(' << Sym << ')';
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else
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OS << Sym;
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2010-03-15 23:51:06 +00:00
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2012-12-12 07:14:46 +00:00
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if (SRE.getKind() == MCSymbolRefExpr::VK_ARM_NONE ||
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SRE.getKind() == MCSymbolRefExpr::VK_ARM_PLT ||
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2010-11-10 03:26:07 +00:00
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SRE.getKind() == MCSymbolRefExpr::VK_ARM_TLSGD ||
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SRE.getKind() == MCSymbolRefExpr::VK_ARM_GOT ||
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SRE.getKind() == MCSymbolRefExpr::VK_ARM_GOTOFF ||
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SRE.getKind() == MCSymbolRefExpr::VK_ARM_TPOFF ||
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2012-01-26 09:25:43 +00:00
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SRE.getKind() == MCSymbolRefExpr::VK_ARM_GOTTPOFF ||
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2012-11-09 20:20:12 +00:00
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SRE.getKind() == MCSymbolRefExpr::VK_ARM_TARGET1 ||
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2012-12-12 07:14:46 +00:00
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SRE.getKind() == MCSymbolRefExpr::VK_ARM_TARGET2 ||
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SRE.getKind() == MCSymbolRefExpr::VK_ARM_PREL31)
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2010-09-22 23:27:36 +00:00
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OS << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
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2013-05-23 22:26:41 +00:00
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else if (SRE.getKind() != MCSymbolRefExpr::VK_None)
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2010-03-15 23:51:06 +00:00
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OS << '@' << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
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2009-08-31 08:07:33 +00:00
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return;
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2009-09-08 23:20:50 +00:00
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}
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2009-08-31 08:07:33 +00:00
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case MCExpr::Unary: {
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const MCUnaryExpr &UE = cast<MCUnaryExpr>(*this);
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switch (UE.getOpcode()) {
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case MCUnaryExpr::LNot: OS << '!'; break;
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case MCUnaryExpr::Minus: OS << '-'; break;
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case MCUnaryExpr::Not: OS << '~'; break;
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case MCUnaryExpr::Plus: OS << '+'; break;
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}
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2010-01-18 00:37:40 +00:00
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OS << *UE.getSubExpr();
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2009-08-31 08:07:33 +00:00
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return;
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}
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case MCExpr::Binary: {
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const MCBinaryExpr &BE = cast<MCBinaryExpr>(*this);
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2010-03-18 00:59:10 +00:00
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2009-09-08 06:34:07 +00:00
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// Only print parens around the LHS if it is non-trivial.
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if (isa<MCConstantExpr>(BE.getLHS()) || isa<MCSymbolRefExpr>(BE.getLHS())) {
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2010-01-18 00:37:40 +00:00
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OS << *BE.getLHS();
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2009-09-08 06:34:07 +00:00
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} else {
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2010-01-18 00:37:40 +00:00
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OS << '(' << *BE.getLHS() << ')';
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2009-09-08 06:34:07 +00:00
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}
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2010-03-18 00:59:10 +00:00
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2009-08-31 08:07:33 +00:00
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switch (BE.getOpcode()) {
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2009-09-08 06:37:35 +00:00
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case MCBinaryExpr::Add:
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// Print "X-42" instead of "X+-42".
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if (const MCConstantExpr *RHSC = dyn_cast<MCConstantExpr>(BE.getRHS())) {
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if (RHSC->getValue() < 0) {
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OS << RHSC->getValue();
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return;
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}
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}
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2010-03-18 00:59:10 +00:00
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2009-09-08 06:37:35 +00:00
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OS << '+';
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break;
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2009-08-31 08:07:33 +00:00
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case MCBinaryExpr::And: OS << '&'; break;
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case MCBinaryExpr::Div: OS << '/'; break;
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case MCBinaryExpr::EQ: OS << "=="; break;
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case MCBinaryExpr::GT: OS << '>'; break;
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case MCBinaryExpr::GTE: OS << ">="; break;
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case MCBinaryExpr::LAnd: OS << "&&"; break;
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case MCBinaryExpr::LOr: OS << "||"; break;
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case MCBinaryExpr::LT: OS << '<'; break;
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case MCBinaryExpr::LTE: OS << "<="; break;
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case MCBinaryExpr::Mod: OS << '%'; break;
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case MCBinaryExpr::Mul: OS << '*'; break;
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case MCBinaryExpr::NE: OS << "!="; break;
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case MCBinaryExpr::Or: OS << '|'; break;
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case MCBinaryExpr::Shl: OS << "<<"; break;
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case MCBinaryExpr::Shr: OS << ">>"; break;
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case MCBinaryExpr::Sub: OS << '-'; break;
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case MCBinaryExpr::Xor: OS << '^'; break;
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}
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2010-03-18 00:59:10 +00:00
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2009-09-08 06:34:07 +00:00
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// Only print parens around the LHS if it is non-trivial.
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if (isa<MCConstantExpr>(BE.getRHS()) || isa<MCSymbolRefExpr>(BE.getRHS())) {
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2010-01-18 00:37:40 +00:00
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OS << *BE.getRHS();
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2009-09-08 06:34:07 +00:00
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} else {
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2010-01-18 00:37:40 +00:00
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OS << '(' << *BE.getRHS() << ')';
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2009-09-08 06:34:07 +00:00
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}
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2009-08-31 08:07:33 +00:00
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return;
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}
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}
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2012-02-07 05:05:23 +00:00
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llvm_unreachable("Invalid expression kind!");
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2009-08-31 08:07:33 +00:00
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}
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2012-09-12 05:06:18 +00:00
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#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
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2009-08-31 08:07:33 +00:00
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void MCExpr::dump() const {
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2010-01-18 00:37:40 +00:00
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print(dbgs());
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2010-01-05 01:28:07 +00:00
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dbgs() << '\n';
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2009-08-31 08:07:33 +00:00
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}
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2012-09-06 19:55:56 +00:00
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#endif
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2009-08-31 08:07:33 +00:00
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/* *** */
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2009-09-08 06:27:48 +00:00
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const MCBinaryExpr *MCBinaryExpr::Create(Opcode Opc, const MCExpr *LHS,
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const MCExpr *RHS, MCContext &Ctx) {
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2009-08-31 08:07:22 +00:00
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return new (Ctx) MCBinaryExpr(Opc, LHS, RHS);
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2009-06-29 20:40:36 +00:00
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}
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2009-09-08 06:27:48 +00:00
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const MCUnaryExpr *MCUnaryExpr::Create(Opcode Opc, const MCExpr *Expr,
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MCContext &Ctx) {
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2009-08-31 08:07:22 +00:00
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return new (Ctx) MCUnaryExpr(Opc, Expr);
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}
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const MCConstantExpr *MCConstantExpr::Create(int64_t Value, MCContext &Ctx) {
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return new (Ctx) MCConstantExpr(Value);
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}
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2010-03-15 23:51:06 +00:00
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/* *** */
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2009-08-31 08:07:22 +00:00
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const MCSymbolRefExpr *MCSymbolRefExpr::Create(const MCSymbol *Sym,
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2010-03-15 23:51:06 +00:00
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VariantKind Kind,
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2009-08-31 08:07:22 +00:00
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MCContext &Ctx) {
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2010-03-15 23:51:06 +00:00
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return new (Ctx) MCSymbolRefExpr(Sym, Kind);
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2009-08-31 08:07:22 +00:00
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}
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2010-03-15 23:51:06 +00:00
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const MCSymbolRefExpr *MCSymbolRefExpr::Create(StringRef Name, VariantKind Kind,
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MCContext &Ctx) {
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return Create(Ctx.GetOrCreateSymbol(Name), Kind, Ctx);
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2009-09-16 01:26:31 +00:00
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}
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2010-03-15 23:51:06 +00:00
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StringRef MCSymbolRefExpr::getVariantKindName(VariantKind Kind) {
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switch (Kind) {
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case VK_Invalid: return "<<invalid>>";
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case VK_None: return "<<none>>";
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case VK_GOT: return "GOT";
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case VK_GOTOFF: return "GOTOFF";
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case VK_GOTPCREL: return "GOTPCREL";
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case VK_GOTTPOFF: return "GOTTPOFF";
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case VK_INDNTPOFF: return "INDNTPOFF";
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case VK_NTPOFF: return "NTPOFF";
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2010-10-28 14:22:44 +00:00
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case VK_GOTNTPOFF: return "GOTNTPOFF";
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2010-03-15 23:51:06 +00:00
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case VK_PLT: return "PLT";
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case VK_TLSGD: return "TLSGD";
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2010-10-28 15:02:40 +00:00
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case VK_TLSLD: return "TLSLD";
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2010-10-28 14:37:09 +00:00
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case VK_TLSLDM: return "TLSLDM";
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2010-03-15 23:51:06 +00:00
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case VK_TPOFF: return "TPOFF";
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2010-10-28 14:48:59 +00:00
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case VK_DTPOFF: return "DTPOFF";
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2010-11-14 22:22:59 +00:00
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case VK_TLVP: return "TLVP";
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2013-03-30 16:21:50 +00:00
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case VK_SECREL: return "SECREL32";
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2012-12-12 07:14:46 +00:00
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case VK_ARM_NONE: return "(NONE)";
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2010-09-22 23:27:36 +00:00
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case VK_ARM_PLT: return "(PLT)";
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2010-11-10 03:26:07 +00:00
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case VK_ARM_GOT: return "(GOT)";
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case VK_ARM_GOTOFF: return "(GOTOFF)";
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case VK_ARM_TPOFF: return "(tpoff)";
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case VK_ARM_GOTTPOFF: return "(gottpoff)";
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2010-11-17 19:30:11 +00:00
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case VK_ARM_TLSGD: return "(tlsgd)";
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2012-01-26 09:25:43 +00:00
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case VK_ARM_TARGET1: return "(target1)";
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2012-11-09 20:20:12 +00:00
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case VK_ARM_TARGET2: return "(target2)";
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2012-12-12 07:14:46 +00:00
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case VK_ARM_PREL31: return "(prel31)";
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2013-06-21 14:42:20 +00:00
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case VK_PPC_LO: return "l";
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2013-06-21 14:42:49 +00:00
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case VK_PPC_HI: return "h";
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2013-06-21 14:42:20 +00:00
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case VK_PPC_HA: return "ha";
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2013-06-21 14:43:42 +00:00
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case VK_PPC_HIGHER: return "higher";
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case VK_PPC_HIGHERA: return "highera";
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case VK_PPC_HIGHEST: return "highest";
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case VK_PPC_HIGHESTA: return "highesta";
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2013-06-25 16:49:50 +00:00
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case VK_PPC_GOT_LO: return "got@l";
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case VK_PPC_GOT_HI: return "got@h";
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case VK_PPC_GOT_HA: return "got@ha";
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2013-06-20 22:39:42 +00:00
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case VK_PPC_TOCBASE: return "tocbase";
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2013-06-21 14:42:20 +00:00
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case VK_PPC_TOC: return "toc";
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case VK_PPC_TOC_LO: return "toc@l";
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2013-06-21 14:43:10 +00:00
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case VK_PPC_TOC_HI: return "toc@h";
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2013-06-21 14:42:20 +00:00
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case VK_PPC_TOC_HA: return "toc@ha";
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2013-07-01 23:33:29 +00:00
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case VK_PPC_DTPMOD: return "dtpmod";
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2013-06-21 14:44:15 +00:00
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case VK_PPC_TPREL: return "tprel";
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2013-06-21 14:42:20 +00:00
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case VK_PPC_TPREL_LO: return "tprel@l";
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2013-06-21 14:44:15 +00:00
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case VK_PPC_TPREL_HI: return "tprel@h";
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2013-06-21 14:42:20 +00:00
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case VK_PPC_TPREL_HA: return "tprel@ha";
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2013-06-21 14:44:15 +00:00
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case VK_PPC_TPREL_HIGHER: return "tprel@higher";
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case VK_PPC_TPREL_HIGHERA: return "tprel@highera";
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case VK_PPC_TPREL_HIGHEST: return "tprel@highest";
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case VK_PPC_TPREL_HIGHESTA: return "tprel@highesta";
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case VK_PPC_DTPREL: return "dtprel";
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2013-06-21 14:42:20 +00:00
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case VK_PPC_DTPREL_LO: return "dtprel@l";
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2013-06-21 14:44:15 +00:00
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case VK_PPC_DTPREL_HI: return "dtprel@h";
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2013-06-21 14:42:20 +00:00
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case VK_PPC_DTPREL_HA: return "dtprel@ha";
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2013-06-21 14:44:15 +00:00
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case VK_PPC_DTPREL_HIGHER: return "dtprel@higher";
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case VK_PPC_DTPREL_HIGHERA: return "dtprel@highera";
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case VK_PPC_DTPREL_HIGHEST: return "dtprel@highest";
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case VK_PPC_DTPREL_HIGHESTA: return "dtprel@highesta";
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case VK_PPC_GOT_TPREL: return "got@tprel";
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2013-06-21 14:42:20 +00:00
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case VK_PPC_GOT_TPREL_LO: return "got@tprel@l";
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2013-06-21 14:44:15 +00:00
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case VK_PPC_GOT_TPREL_HI: return "got@tprel@h";
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2013-06-21 14:42:20 +00:00
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case VK_PPC_GOT_TPREL_HA: return "got@tprel@ha";
|
2013-06-21 14:44:15 +00:00
|
|
|
case VK_PPC_GOT_DTPREL: return "got@dtprel";
|
|
|
|
|
case VK_PPC_GOT_DTPREL_LO: return "got@dtprel@l";
|
|
|
|
|
case VK_PPC_GOT_DTPREL_HI: return "got@dtprel@h";
|
|
|
|
|
case VK_PPC_GOT_DTPREL_HA: return "got@dtprel@ha";
|
2012-12-04 16:18:08 +00:00
|
|
|
case VK_PPC_TLS: return "tls";
|
2013-06-21 14:44:15 +00:00
|
|
|
case VK_PPC_GOT_TLSGD: return "got@tlsgd";
|
2013-06-21 14:42:20 +00:00
|
|
|
case VK_PPC_GOT_TLSGD_LO: return "got@tlsgd@l";
|
2013-06-21 14:44:15 +00:00
|
|
|
case VK_PPC_GOT_TLSGD_HI: return "got@tlsgd@h";
|
2013-06-21 14:42:20 +00:00
|
|
|
case VK_PPC_GOT_TLSGD_HA: return "got@tlsgd@ha";
|
[PowerPC] Revert r185476 and fix up TLS variant kinds
In the commit message to r185476 I wrote:
>The PowerPC-specific modifiers VK_PPC_TLSGD and VK_PPC_TLSLD
>correspond exactly to the generic modifiers VK_TLSGD and VK_TLSLD.
>This causes some confusion with the asm parser, since VK_PPC_TLSGD
>is output as @tlsgd, which is then read back in as VK_TLSGD.
>
>To avoid this confusion, this patch removes the PowerPC-specific
>modifiers and uses the generic modifiers throughout. (The only
>drawback is that the generic modifiers are printed in upper case
>while the usual convention on PowerPC is to use lower-case modifiers.
>But this is just a cosmetic issue.)
This was unfortunately incorrect, there is is fact another,
serious drawback to using the default VK_TLSLD/VK_TLSGD
variant kinds: using these causes ELFObjectWriter::RelocNeedsGOT
to return true, which in turn causes the ELFObjectWriter to emit
an undefined reference to _GLOBAL_OFFSET_TABLE_.
This is a problem on powerpc64, because it uses the TOC instead
of the GOT, and the linker does not provide _GLOBAL_OFFSET_TABLE_,
so the symbol remains undefined. This means shared libraries
using TLS built with the integrated assembler are currently
broken.
While the whole RelocNeedsGOT / _GLOBAL_OFFSET_TABLE_ situation
probably ought to be properly fixed at some point, for now I'm
simply reverting the r185476 commit. Now this in turn exposes
the breakage of handling @tlsgd/@tlsld in the asm parser that
this check-in was originally intended to fix.
To avoid this regression, I'm also adding a different fix for
this problem: while common code now parses @tlsgd as VK_TLSGD,
a special hack in the asm parser translates this code to the
platform-specific VK_PPC_TLSGD that the back-end now expects.
While this is not really pretty, it's self-contained and
shouldn't hurt anything else for now. One the underlying
problem is fixed, this hack can be reverted again.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185945 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-09 16:41:09 +00:00
|
|
|
case VK_PPC_TLSGD: return "tlsgd";
|
2013-06-21 14:44:15 +00:00
|
|
|
case VK_PPC_GOT_TLSLD: return "got@tlsld";
|
2013-06-21 14:42:20 +00:00
|
|
|
case VK_PPC_GOT_TLSLD_LO: return "got@tlsld@l";
|
2013-06-21 14:44:15 +00:00
|
|
|
case VK_PPC_GOT_TLSLD_HI: return "got@tlsld@h";
|
2013-06-21 14:42:20 +00:00
|
|
|
case VK_PPC_GOT_TLSLD_HA: return "got@tlsld@ha";
|
[PowerPC] Revert r185476 and fix up TLS variant kinds
In the commit message to r185476 I wrote:
>The PowerPC-specific modifiers VK_PPC_TLSGD and VK_PPC_TLSLD
>correspond exactly to the generic modifiers VK_TLSGD and VK_TLSLD.
>This causes some confusion with the asm parser, since VK_PPC_TLSGD
>is output as @tlsgd, which is then read back in as VK_TLSGD.
>
>To avoid this confusion, this patch removes the PowerPC-specific
>modifiers and uses the generic modifiers throughout. (The only
>drawback is that the generic modifiers are printed in upper case
>while the usual convention on PowerPC is to use lower-case modifiers.
>But this is just a cosmetic issue.)
This was unfortunately incorrect, there is is fact another,
serious drawback to using the default VK_TLSLD/VK_TLSGD
variant kinds: using these causes ELFObjectWriter::RelocNeedsGOT
to return true, which in turn causes the ELFObjectWriter to emit
an undefined reference to _GLOBAL_OFFSET_TABLE_.
This is a problem on powerpc64, because it uses the TOC instead
of the GOT, and the linker does not provide _GLOBAL_OFFSET_TABLE_,
so the symbol remains undefined. This means shared libraries
using TLS built with the integrated assembler are currently
broken.
While the whole RelocNeedsGOT / _GLOBAL_OFFSET_TABLE_ situation
probably ought to be properly fixed at some point, for now I'm
simply reverting the r185476 commit. Now this in turn exposes
the breakage of handling @tlsgd/@tlsld in the asm parser that
this check-in was originally intended to fix.
To avoid this regression, I'm also adding a different fix for
this problem: while common code now parses @tlsgd as VK_TLSGD,
a special hack in the asm parser translates this code to the
platform-specific VK_PPC_TLSGD that the back-end now expects.
While this is not really pretty, it's self-contained and
shouldn't hurt anything else for now. One the underlying
problem is fixed, this hack can be reverted again.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185945 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-09 16:41:09 +00:00
|
|
|
case VK_PPC_TLSLD: return "tlsld";
|
2011-12-22 01:05:17 +00:00
|
|
|
case VK_Mips_GPREL: return "GPREL";
|
|
|
|
|
case VK_Mips_GOT_CALL: return "GOT_CALL";
|
|
|
|
|
case VK_Mips_GOT16: return "GOT16";
|
|
|
|
|
case VK_Mips_GOT: return "GOT";
|
|
|
|
|
case VK_Mips_ABS_HI: return "ABS_HI";
|
|
|
|
|
case VK_Mips_ABS_LO: return "ABS_LO";
|
|
|
|
|
case VK_Mips_TLSGD: return "TLSGD";
|
|
|
|
|
case VK_Mips_TLSLDM: return "TLSLDM";
|
|
|
|
|
case VK_Mips_DTPREL_HI: return "DTPREL_HI";
|
|
|
|
|
case VK_Mips_DTPREL_LO: return "DTPREL_LO";
|
|
|
|
|
case VK_Mips_GOTTPREL: return "GOTTPREL";
|
|
|
|
|
case VK_Mips_TPREL_HI: return "TPREL_HI";
|
|
|
|
|
case VK_Mips_TPREL_LO: return "TPREL_LO";
|
|
|
|
|
case VK_Mips_GPOFF_HI: return "GPOFF_HI";
|
|
|
|
|
case VK_Mips_GPOFF_LO: return "GPOFF_LO";
|
|
|
|
|
case VK_Mips_GOT_DISP: return "GOT_DISP";
|
|
|
|
|
case VK_Mips_GOT_PAGE: return "GOT_PAGE";
|
|
|
|
|
case VK_Mips_GOT_OFST: return "GOT_OFST";
|
2012-07-21 02:15:19 +00:00
|
|
|
case VK_Mips_HIGHER: return "HIGHER";
|
|
|
|
|
case VK_Mips_HIGHEST: return "HIGHEST";
|
2012-11-21 19:50:22 +00:00
|
|
|
case VK_Mips_GOT_HI16: return "GOT_HI16";
|
|
|
|
|
case VK_Mips_GOT_LO16: return "GOT_LO16";
|
|
|
|
|
case VK_Mips_CALL_HI16: return "CALL_HI16";
|
|
|
|
|
case VK_Mips_CALL_LO16: return "CALL_LO16";
|
2013-04-10 23:28:17 +00:00
|
|
|
case VK_COFF_IMGREL32: return "IMGREL32";
|
2010-03-15 23:51:06 +00:00
|
|
|
}
|
2012-01-10 18:08:01 +00:00
|
|
|
llvm_unreachable("Invalid variant kind");
|
2010-03-15 23:51:06 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
MCSymbolRefExpr::VariantKind
|
|
|
|
|
MCSymbolRefExpr::getVariantKindForName(StringRef Name) {
|
|
|
|
|
return StringSwitch<VariantKind>(Name)
|
|
|
|
|
.Case("GOT", VK_GOT)
|
2011-01-23 16:11:25 +00:00
|
|
|
.Case("got", VK_GOT)
|
2010-03-15 23:51:06 +00:00
|
|
|
.Case("GOTOFF", VK_GOTOFF)
|
2011-01-23 16:11:25 +00:00
|
|
|
.Case("gotoff", VK_GOTOFF)
|
2010-03-15 23:51:06 +00:00
|
|
|
.Case("GOTPCREL", VK_GOTPCREL)
|
2011-01-23 16:11:25 +00:00
|
|
|
.Case("gotpcrel", VK_GOTPCREL)
|
2010-03-15 23:51:06 +00:00
|
|
|
.Case("GOTTPOFF", VK_GOTTPOFF)
|
2011-01-23 16:11:25 +00:00
|
|
|
.Case("gottpoff", VK_GOTTPOFF)
|
2010-03-15 23:51:06 +00:00
|
|
|
.Case("INDNTPOFF", VK_INDNTPOFF)
|
2011-01-23 16:11:25 +00:00
|
|
|
.Case("indntpoff", VK_INDNTPOFF)
|
2010-03-15 23:51:06 +00:00
|
|
|
.Case("NTPOFF", VK_NTPOFF)
|
2011-01-23 16:11:25 +00:00
|
|
|
.Case("ntpoff", VK_NTPOFF)
|
2010-10-28 14:22:44 +00:00
|
|
|
.Case("GOTNTPOFF", VK_GOTNTPOFF)
|
2011-01-23 16:11:25 +00:00
|
|
|
.Case("gotntpoff", VK_GOTNTPOFF)
|
2010-03-15 23:51:06 +00:00
|
|
|
.Case("PLT", VK_PLT)
|
2011-01-23 16:11:25 +00:00
|
|
|
.Case("plt", VK_PLT)
|
2010-03-15 23:51:06 +00:00
|
|
|
.Case("TLSGD", VK_TLSGD)
|
2011-01-23 16:11:25 +00:00
|
|
|
.Case("tlsgd", VK_TLSGD)
|
2010-10-28 15:02:40 +00:00
|
|
|
.Case("TLSLD", VK_TLSLD)
|
2011-01-23 16:11:25 +00:00
|
|
|
.Case("tlsld", VK_TLSLD)
|
2010-10-28 14:37:09 +00:00
|
|
|
.Case("TLSLDM", VK_TLSLDM)
|
2011-01-23 16:11:25 +00:00
|
|
|
.Case("tlsldm", VK_TLSLDM)
|
2010-03-15 23:51:06 +00:00
|
|
|
.Case("TPOFF", VK_TPOFF)
|
2011-01-23 16:11:25 +00:00
|
|
|
.Case("tpoff", VK_TPOFF)
|
2010-10-28 14:48:59 +00:00
|
|
|
.Case("DTPOFF", VK_DTPOFF)
|
2011-01-23 16:11:25 +00:00
|
|
|
.Case("dtpoff", VK_DTPOFF)
|
2010-05-26 00:02:12 +00:00
|
|
|
.Case("TLVP", VK_TLVP)
|
2011-01-23 16:11:25 +00:00
|
|
|
.Case("tlvp", VK_TLVP)
|
2013-04-10 23:28:17 +00:00
|
|
|
.Case("IMGREL", VK_COFF_IMGREL32)
|
|
|
|
|
.Case("imgrel", VK_COFF_IMGREL32)
|
2013-04-25 19:27:05 +00:00
|
|
|
.Case("SECREL32", VK_SECREL)
|
|
|
|
|
.Case("secrel32", VK_SECREL)
|
2013-06-21 14:42:20 +00:00
|
|
|
.Case("L", VK_PPC_LO)
|
|
|
|
|
.Case("l", VK_PPC_LO)
|
2013-06-21 14:42:49 +00:00
|
|
|
.Case("H", VK_PPC_HI)
|
|
|
|
|
.Case("h", VK_PPC_HI)
|
2013-06-21 14:42:20 +00:00
|
|
|
.Case("HA", VK_PPC_HA)
|
|
|
|
|
.Case("ha", VK_PPC_HA)
|
2013-06-21 14:43:42 +00:00
|
|
|
.Case("HIGHER", VK_PPC_HIGHER)
|
|
|
|
|
.Case("higher", VK_PPC_HIGHER)
|
|
|
|
|
.Case("HIGHERA", VK_PPC_HIGHERA)
|
|
|
|
|
.Case("highera", VK_PPC_HIGHERA)
|
|
|
|
|
.Case("HIGHEST", VK_PPC_HIGHEST)
|
|
|
|
|
.Case("highest", VK_PPC_HIGHEST)
|
|
|
|
|
.Case("HIGHESTA", VK_PPC_HIGHESTA)
|
|
|
|
|
.Case("highesta", VK_PPC_HIGHESTA)
|
2013-06-25 16:49:50 +00:00
|
|
|
.Case("GOT@L", VK_PPC_GOT_LO)
|
|
|
|
|
.Case("got@l", VK_PPC_GOT_LO)
|
|
|
|
|
.Case("GOT@H", VK_PPC_GOT_HI)
|
|
|
|
|
.Case("got@h", VK_PPC_GOT_HI)
|
|
|
|
|
.Case("GOT@HA", VK_PPC_GOT_HA)
|
|
|
|
|
.Case("got@ha", VK_PPC_GOT_HA)
|
2013-06-20 22:39:42 +00:00
|
|
|
.Case("TOCBASE", VK_PPC_TOCBASE)
|
|
|
|
|
.Case("tocbase", VK_PPC_TOCBASE)
|
2013-06-21 14:42:20 +00:00
|
|
|
.Case("TOC", VK_PPC_TOC)
|
|
|
|
|
.Case("toc", VK_PPC_TOC)
|
|
|
|
|
.Case("TOC@L", VK_PPC_TOC_LO)
|
|
|
|
|
.Case("toc@l", VK_PPC_TOC_LO)
|
2013-06-21 14:43:10 +00:00
|
|
|
.Case("TOC@H", VK_PPC_TOC_HI)
|
|
|
|
|
.Case("toc@h", VK_PPC_TOC_HI)
|
2013-06-21 14:42:20 +00:00
|
|
|
.Case("TOC@HA", VK_PPC_TOC_HA)
|
|
|
|
|
.Case("toc@ha", VK_PPC_TOC_HA)
|
2013-05-03 19:52:35 +00:00
|
|
|
.Case("TLS", VK_PPC_TLS)
|
|
|
|
|
.Case("tls", VK_PPC_TLS)
|
2013-07-01 23:33:29 +00:00
|
|
|
.Case("DTPMOD", VK_PPC_DTPMOD)
|
|
|
|
|
.Case("dtpmod", VK_PPC_DTPMOD)
|
2013-06-21 14:44:15 +00:00
|
|
|
.Case("TPREL", VK_PPC_TPREL)
|
|
|
|
|
.Case("tprel", VK_PPC_TPREL)
|
2013-06-21 14:42:20 +00:00
|
|
|
.Case("TPREL@L", VK_PPC_TPREL_LO)
|
|
|
|
|
.Case("tprel@l", VK_PPC_TPREL_LO)
|
2013-06-21 14:44:15 +00:00
|
|
|
.Case("TPREL@H", VK_PPC_TPREL_HI)
|
|
|
|
|
.Case("tprel@h", VK_PPC_TPREL_HI)
|
2013-06-21 14:42:20 +00:00
|
|
|
.Case("TPREL@HA", VK_PPC_TPREL_HA)
|
|
|
|
|
.Case("tprel@ha", VK_PPC_TPREL_HA)
|
2013-06-21 14:44:15 +00:00
|
|
|
.Case("TPREL@HIGHER", VK_PPC_TPREL_HIGHER)
|
|
|
|
|
.Case("tprel@higher", VK_PPC_TPREL_HIGHER)
|
|
|
|
|
.Case("TPREL@HIGHERA", VK_PPC_TPREL_HIGHERA)
|
|
|
|
|
.Case("tprel@highera", VK_PPC_TPREL_HIGHERA)
|
|
|
|
|
.Case("TPREL@HIGHEST", VK_PPC_TPREL_HIGHEST)
|
|
|
|
|
.Case("tprel@highest", VK_PPC_TPREL_HIGHEST)
|
|
|
|
|
.Case("TPREL@HIGHESTA", VK_PPC_TPREL_HIGHESTA)
|
|
|
|
|
.Case("tprel@highesta", VK_PPC_TPREL_HIGHESTA)
|
|
|
|
|
.Case("DTPREL", VK_PPC_DTPREL)
|
|
|
|
|
.Case("dtprel", VK_PPC_DTPREL)
|
2013-06-21 14:42:20 +00:00
|
|
|
.Case("DTPREL@L", VK_PPC_DTPREL_LO)
|
|
|
|
|
.Case("dtprel@l", VK_PPC_DTPREL_LO)
|
2013-06-21 14:44:15 +00:00
|
|
|
.Case("DTPREL@H", VK_PPC_DTPREL_HI)
|
|
|
|
|
.Case("dtprel@h", VK_PPC_DTPREL_HI)
|
2013-06-21 14:42:20 +00:00
|
|
|
.Case("DTPREL@HA", VK_PPC_DTPREL_HA)
|
|
|
|
|
.Case("dtprel@ha", VK_PPC_DTPREL_HA)
|
2013-06-21 14:44:15 +00:00
|
|
|
.Case("DTPREL@HIGHER", VK_PPC_DTPREL_HIGHER)
|
|
|
|
|
.Case("dtprel@higher", VK_PPC_DTPREL_HIGHER)
|
|
|
|
|
.Case("DTPREL@HIGHERA", VK_PPC_DTPREL_HIGHERA)
|
|
|
|
|
.Case("dtprel@highera", VK_PPC_DTPREL_HIGHERA)
|
|
|
|
|
.Case("DTPREL@HIGHEST", VK_PPC_DTPREL_HIGHEST)
|
|
|
|
|
.Case("dtprel@highest", VK_PPC_DTPREL_HIGHEST)
|
|
|
|
|
.Case("DTPREL@HIGHESTA", VK_PPC_DTPREL_HIGHESTA)
|
|
|
|
|
.Case("dtprel@highesta", VK_PPC_DTPREL_HIGHESTA)
|
|
|
|
|
.Case("GOT@TPREL", VK_PPC_GOT_TPREL)
|
|
|
|
|
.Case("got@tprel", VK_PPC_GOT_TPREL)
|
2013-06-21 14:42:20 +00:00
|
|
|
.Case("GOT@TPREL@L", VK_PPC_GOT_TPREL_LO)
|
|
|
|
|
.Case("got@tprel@l", VK_PPC_GOT_TPREL_LO)
|
2013-06-21 14:44:15 +00:00
|
|
|
.Case("GOT@TPREL@H", VK_PPC_GOT_TPREL_HI)
|
|
|
|
|
.Case("got@tprel@h", VK_PPC_GOT_TPREL_HI)
|
2013-06-21 14:42:20 +00:00
|
|
|
.Case("GOT@TPREL@HA", VK_PPC_GOT_TPREL_HA)
|
|
|
|
|
.Case("got@tprel@ha", VK_PPC_GOT_TPREL_HA)
|
2013-06-21 14:44:15 +00:00
|
|
|
.Case("GOT@DTPREL", VK_PPC_GOT_DTPREL)
|
|
|
|
|
.Case("got@dtprel", VK_PPC_GOT_DTPREL)
|
|
|
|
|
.Case("GOT@DTPREL@L", VK_PPC_GOT_DTPREL_LO)
|
|
|
|
|
.Case("got@dtprel@l", VK_PPC_GOT_DTPREL_LO)
|
|
|
|
|
.Case("GOT@DTPREL@H", VK_PPC_GOT_DTPREL_HI)
|
|
|
|
|
.Case("got@dtprel@h", VK_PPC_GOT_DTPREL_HI)
|
|
|
|
|
.Case("GOT@DTPREL@HA", VK_PPC_GOT_DTPREL_HA)
|
|
|
|
|
.Case("got@dtprel@ha", VK_PPC_GOT_DTPREL_HA)
|
|
|
|
|
.Case("GOT@TLSGD", VK_PPC_GOT_TLSGD)
|
|
|
|
|
.Case("got@tlsgd", VK_PPC_GOT_TLSGD)
|
2013-06-21 14:42:20 +00:00
|
|
|
.Case("GOT@TLSGD@L", VK_PPC_GOT_TLSGD_LO)
|
|
|
|
|
.Case("got@tlsgd@l", VK_PPC_GOT_TLSGD_LO)
|
2013-06-21 14:44:15 +00:00
|
|
|
.Case("GOT@TLSGD@H", VK_PPC_GOT_TLSGD_HI)
|
|
|
|
|
.Case("got@tlsgd@h", VK_PPC_GOT_TLSGD_HI)
|
2013-06-21 14:42:20 +00:00
|
|
|
.Case("GOT@TLSGD@HA", VK_PPC_GOT_TLSGD_HA)
|
|
|
|
|
.Case("got@tlsgd@ha", VK_PPC_GOT_TLSGD_HA)
|
2013-06-21 14:44:15 +00:00
|
|
|
.Case("GOT@TLSLD", VK_PPC_GOT_TLSLD)
|
|
|
|
|
.Case("got@tlsld", VK_PPC_GOT_TLSLD)
|
2013-06-21 14:42:20 +00:00
|
|
|
.Case("GOT@TLSLD@L", VK_PPC_GOT_TLSLD_LO)
|
|
|
|
|
.Case("got@tlsld@l", VK_PPC_GOT_TLSLD_LO)
|
2013-06-21 14:44:15 +00:00
|
|
|
.Case("GOT@TLSLD@H", VK_PPC_GOT_TLSLD_HI)
|
|
|
|
|
.Case("got@tlsld@h", VK_PPC_GOT_TLSLD_HI)
|
2013-06-21 14:42:20 +00:00
|
|
|
.Case("GOT@TLSLD@HA", VK_PPC_GOT_TLSLD_HA)
|
|
|
|
|
.Case("got@tlsld@ha", VK_PPC_GOT_TLSLD_HA)
|
2010-03-15 23:51:06 +00:00
|
|
|
.Default(VK_Invalid);
|
2010-03-10 02:25:11 +00:00
|
|
|
}
|
|
|
|
|
|
2010-03-15 23:51:06 +00:00
|
|
|
/* *** */
|
|
|
|
|
|
2012-09-26 06:36:36 +00:00
|
|
|
void MCTargetExpr::anchor() {}
|
2009-09-16 01:26:31 +00:00
|
|
|
|
2009-08-31 08:07:22 +00:00
|
|
|
/* *** */
|
|
|
|
|
|
2010-12-18 03:57:21 +00:00
|
|
|
bool MCExpr::EvaluateAsAbsolute(int64_t &Res) const {
|
|
|
|
|
return EvaluateAsAbsolute(Res, 0, 0, 0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bool MCExpr::EvaluateAsAbsolute(int64_t &Res,
|
|
|
|
|
const MCAsmLayout &Layout) const {
|
|
|
|
|
return EvaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, 0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bool MCExpr::EvaluateAsAbsolute(int64_t &Res,
|
|
|
|
|
const MCAsmLayout &Layout,
|
|
|
|
|
const SectionAddrMap &Addrs) const {
|
|
|
|
|
return EvaluateAsAbsolute(Res, &Layout.getAssembler(), &Layout, &Addrs);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAssembler &Asm) const {
|
|
|
|
|
return EvaluateAsAbsolute(Res, &Asm, 0, 0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
|
|
|
|
|
const MCAsmLayout *Layout,
|
2010-12-07 00:27:36 +00:00
|
|
|
const SectionAddrMap *Addrs) const {
|
2009-06-30 01:49:52 +00:00
|
|
|
MCValue Value;
|
2010-03-18 00:59:10 +00:00
|
|
|
|
2010-03-23 23:47:07 +00:00
|
|
|
// Fast path constants.
|
|
|
|
|
if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(this)) {
|
|
|
|
|
Res = CE->getValue();
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
2010-12-18 04:19:20 +00:00
|
|
|
// FIXME: The use if InSet = Addrs is a hack. Setting InSet causes us
|
|
|
|
|
// absolutize differences across sections and that is what the MachO writer
|
|
|
|
|
// uses Addrs for.
|
2010-12-22 22:16:24 +00:00
|
|
|
bool IsRelocatable =
|
|
|
|
|
EvaluateAsRelocatableImpl(Value, Asm, Layout, Addrs, /*InSet*/ Addrs);
|
2009-06-30 01:49:52 +00:00
|
|
|
|
2010-12-22 22:16:24 +00:00
|
|
|
// Record the current value.
|
2009-06-30 01:49:52 +00:00
|
|
|
Res = Value.getConstant();
|
2010-12-22 22:16:24 +00:00
|
|
|
|
|
|
|
|
return IsRelocatable && Value.isAbsolute();
|
2009-06-30 01:49:52 +00:00
|
|
|
}
|
|
|
|
|
|
2010-12-17 05:50:33 +00:00
|
|
|
/// \brief Helper method for \see EvaluateSymbolAdd().
|
2010-12-19 04:18:56 +00:00
|
|
|
static void AttemptToFoldSymbolOffsetDifference(const MCAssembler *Asm,
|
|
|
|
|
const MCAsmLayout *Layout,
|
|
|
|
|
const SectionAddrMap *Addrs,
|
|
|
|
|
bool InSet,
|
2010-12-17 05:50:33 +00:00
|
|
|
const MCSymbolRefExpr *&A,
|
|
|
|
|
const MCSymbolRefExpr *&B,
|
|
|
|
|
int64_t &Addend) {
|
2010-12-19 04:18:56 +00:00
|
|
|
if (!A || !B)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
const MCSymbol &SA = A->getSymbol();
|
|
|
|
|
const MCSymbol &SB = B->getSymbol();
|
|
|
|
|
|
|
|
|
|
if (SA.isUndefined() || SB.isUndefined())
|
|
|
|
|
return;
|
2010-12-17 05:50:33 +00:00
|
|
|
|
2010-12-19 04:18:56 +00:00
|
|
|
if (!Asm->getWriter().IsSymbolRefDifferenceFullyResolved(*Asm, A, B, InSet))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
MCSymbolData &AD = Asm->getSymbolData(SA);
|
|
|
|
|
MCSymbolData &BD = Asm->getSymbolData(SB);
|
|
|
|
|
|
|
|
|
|
if (AD.getFragment() == BD.getFragment()) {
|
|
|
|
|
Addend += (AD.getOffset() - BD.getOffset());
|
2010-12-17 05:50:33 +00:00
|
|
|
|
2011-03-21 23:13:43 +00:00
|
|
|
// Pointers to Thumb symbols need to have their low-bit set to allow
|
|
|
|
|
// for interworking.
|
|
|
|
|
if (Asm->isThumbFunc(&SA))
|
|
|
|
|
Addend |= 1;
|
|
|
|
|
|
2010-12-17 05:50:33 +00:00
|
|
|
// Clear the symbol expr pointers to indicate we have folded these
|
|
|
|
|
// operands.
|
|
|
|
|
A = B = 0;
|
2010-12-19 04:18:56 +00:00
|
|
|
return;
|
2010-12-17 05:50:33 +00:00
|
|
|
}
|
2010-12-19 04:18:56 +00:00
|
|
|
|
|
|
|
|
if (!Layout)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
const MCSectionData &SecA = *AD.getFragment()->getParent();
|
|
|
|
|
const MCSectionData &SecB = *BD.getFragment()->getParent();
|
|
|
|
|
|
|
|
|
|
if ((&SecA != &SecB) && !Addrs)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
// Eagerly evaluate.
|
|
|
|
|
Addend += (Layout->getSymbolOffset(&Asm->getSymbolData(A->getSymbol())) -
|
|
|
|
|
Layout->getSymbolOffset(&Asm->getSymbolData(B->getSymbol())));
|
|
|
|
|
if (Addrs && (&SecA != &SecB))
|
|
|
|
|
Addend += (Addrs->lookup(&SecA) - Addrs->lookup(&SecB));
|
|
|
|
|
|
2012-02-24 05:12:18 +00:00
|
|
|
// Pointers to Thumb symbols need to have their low-bit set to allow
|
|
|
|
|
// for interworking.
|
|
|
|
|
if (Asm->isThumbFunc(&SA))
|
|
|
|
|
Addend |= 1;
|
|
|
|
|
|
2010-12-19 04:18:56 +00:00
|
|
|
// Clear the symbol expr pointers to indicate we have folded these
|
|
|
|
|
// operands.
|
|
|
|
|
A = B = 0;
|
2010-12-17 05:50:33 +00:00
|
|
|
}
|
|
|
|
|
|
2010-12-16 18:36:25 +00:00
|
|
|
/// \brief Evaluate the result of an add between (conceptually) two MCValues.
|
|
|
|
|
///
|
|
|
|
|
/// This routine conceptually attempts to construct an MCValue:
|
|
|
|
|
/// Result = (Result_A - Result_B + Result_Cst)
|
|
|
|
|
/// from two MCValue's LHS and RHS where
|
|
|
|
|
/// Result = LHS + RHS
|
|
|
|
|
/// and
|
|
|
|
|
/// Result = (LHS_A - LHS_B + LHS_Cst) + (RHS_A - RHS_B + RHS_Cst).
|
|
|
|
|
///
|
|
|
|
|
/// This routine attempts to aggresively fold the operands such that the result
|
|
|
|
|
/// is representable in an MCValue, but may not always succeed.
|
|
|
|
|
///
|
|
|
|
|
/// \returns True on success, false if the result is not representable in an
|
|
|
|
|
/// MCValue.
|
2010-12-18 03:57:21 +00:00
|
|
|
|
|
|
|
|
/// NOTE: It is really important to have both the Asm and Layout arguments.
|
|
|
|
|
/// They might look redundant, but this function can be used before layout
|
|
|
|
|
/// is done (see the object streamer for example) and having the Asm argument
|
2010-12-18 04:01:45 +00:00
|
|
|
/// lets us avoid relaxations early.
|
2010-12-18 03:57:21 +00:00
|
|
|
static bool EvaluateSymbolicAdd(const MCAssembler *Asm,
|
|
|
|
|
const MCAsmLayout *Layout,
|
2010-12-07 00:27:36 +00:00
|
|
|
const SectionAddrMap *Addrs,
|
2010-12-03 00:55:40 +00:00
|
|
|
bool InSet,
|
2010-10-16 18:23:53 +00:00
|
|
|
const MCValue &LHS,const MCSymbolRefExpr *RHS_A,
|
2010-03-18 00:59:10 +00:00
|
|
|
const MCSymbolRefExpr *RHS_B, int64_t RHS_Cst,
|
2009-06-30 02:08:27 +00:00
|
|
|
MCValue &Res) {
|
2010-12-17 01:07:20 +00:00
|
|
|
// FIXME: This routine (and other evaluation parts) are *incredibly* sloppy
|
|
|
|
|
// about dealing with modifiers. This will ultimately bite us, one day.
|
|
|
|
|
const MCSymbolRefExpr *LHS_A = LHS.getSymA();
|
|
|
|
|
const MCSymbolRefExpr *LHS_B = LHS.getSymB();
|
|
|
|
|
int64_t LHS_Cst = LHS.getConstant();
|
|
|
|
|
|
|
|
|
|
// Fold the result constant immediately.
|
|
|
|
|
int64_t Result_Cst = LHS_Cst + RHS_Cst;
|
|
|
|
|
|
2010-12-19 04:18:56 +00:00
|
|
|
assert((!Layout || Asm) &&
|
|
|
|
|
"Must have an assembler object if layout is given!");
|
|
|
|
|
|
2010-12-17 05:50:33 +00:00
|
|
|
// If we have a layout, we can fold resolved differences.
|
2010-12-19 04:18:56 +00:00
|
|
|
if (Asm) {
|
2010-12-17 05:50:33 +00:00
|
|
|
// First, fold out any differences which are fully resolved. By
|
|
|
|
|
// reassociating terms in
|
|
|
|
|
// Result = (LHS_A - LHS_B + LHS_Cst) + (RHS_A - RHS_B + RHS_Cst).
|
|
|
|
|
// we have the four possible differences:
|
|
|
|
|
// (LHS_A - LHS_B),
|
|
|
|
|
// (LHS_A - RHS_B),
|
|
|
|
|
// (RHS_A - LHS_B),
|
|
|
|
|
// (RHS_A - RHS_B).
|
2011-04-15 05:18:47 +00:00
|
|
|
// Since we are attempting to be as aggressive as possible about folding, we
|
2010-12-17 05:50:33 +00:00
|
|
|
// attempt to evaluate each possible alternative.
|
2010-12-19 04:18:56 +00:00
|
|
|
AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, LHS_A, LHS_B,
|
|
|
|
|
Result_Cst);
|
|
|
|
|
AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, LHS_A, RHS_B,
|
|
|
|
|
Result_Cst);
|
|
|
|
|
AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, RHS_A, LHS_B,
|
|
|
|
|
Result_Cst);
|
|
|
|
|
AttemptToFoldSymbolOffsetDifference(Asm, Layout, Addrs, InSet, RHS_A, RHS_B,
|
|
|
|
|
Result_Cst);
|
2010-12-17 05:50:33 +00:00
|
|
|
}
|
|
|
|
|
|
2010-12-17 01:07:20 +00:00
|
|
|
// We can't represent the addition or subtraction of two symbols.
|
|
|
|
|
if ((LHS_A && RHS_A) || (LHS_B && RHS_B))
|
2009-06-30 02:08:27 +00:00
|
|
|
return false;
|
|
|
|
|
|
2010-12-17 05:50:33 +00:00
|
|
|
// At this point, we have at most one additive symbol and one subtractive
|
|
|
|
|
// symbol -- find them.
|
2010-12-17 01:07:20 +00:00
|
|
|
const MCSymbolRefExpr *A = LHS_A ? LHS_A : RHS_A;
|
|
|
|
|
const MCSymbolRefExpr *B = LHS_B ? LHS_B : RHS_B;
|
2010-12-17 05:50:33 +00:00
|
|
|
|
|
|
|
|
// If we have a negated symbol, then we must have also have a non-negated
|
|
|
|
|
// symbol in order to encode the expression.
|
|
|
|
|
if (B && !A)
|
|
|
|
|
return false;
|
2010-10-16 18:23:53 +00:00
|
|
|
|
2010-12-17 01:07:20 +00:00
|
|
|
Res = MCValue::get(A, B, Result_Cst);
|
2009-06-30 02:08:27 +00:00
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
2010-12-18 03:57:21 +00:00
|
|
|
bool MCExpr::EvaluateAsRelocatable(MCValue &Res,
|
2010-12-22 16:11:57 +00:00
|
|
|
const MCAsmLayout &Layout) const {
|
|
|
|
|
return EvaluateAsRelocatableImpl(Res, &Layout.getAssembler(), &Layout,
|
|
|
|
|
0, false);
|
2010-12-18 03:57:21 +00:00
|
|
|
}
|
|
|
|
|
|
2010-10-16 18:23:53 +00:00
|
|
|
bool MCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
|
2010-12-18 03:57:21 +00:00
|
|
|
const MCAssembler *Asm,
|
2010-10-16 18:23:53 +00:00
|
|
|
const MCAsmLayout *Layout,
|
2010-12-07 00:27:36 +00:00
|
|
|
const SectionAddrMap *Addrs,
|
2010-10-16 18:23:53 +00:00
|
|
|
bool InSet) const {
|
2010-03-23 23:47:14 +00:00
|
|
|
++stats::MCExprEvaluate;
|
|
|
|
|
|
2009-06-29 20:40:36 +00:00
|
|
|
switch (getKind()) {
|
2010-02-08 19:41:07 +00:00
|
|
|
case Target:
|
2010-03-11 02:28:59 +00:00
|
|
|
return cast<MCTargetExpr>(this)->EvaluateAsRelocatableImpl(Res, Layout);
|
2010-03-18 00:59:10 +00:00
|
|
|
|
2009-06-29 20:40:36 +00:00
|
|
|
case Constant:
|
2009-08-31 08:06:59 +00:00
|
|
|
Res = MCValue::get(cast<MCConstantExpr>(this)->getValue());
|
2009-06-29 20:40:36 +00:00
|
|
|
return true;
|
|
|
|
|
|
|
|
|
|
case SymbolRef: {
|
2010-03-18 00:59:10 +00:00
|
|
|
const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
|
|
|
|
|
const MCSymbol &Sym = SRE->getSymbol();
|
2009-10-16 01:33:57 +00:00
|
|
|
|
|
|
|
|
// Evaluate recursively if this is a variable.
|
2010-11-15 16:33:49 +00:00
|
|
|
if (Sym.isVariable() && SRE->getKind() == MCSymbolRefExpr::VK_None) {
|
2010-12-18 03:57:21 +00:00
|
|
|
bool Ret = Sym.getVariableValue()->EvaluateAsRelocatableImpl(Res, Asm,
|
|
|
|
|
Layout,
|
|
|
|
|
Addrs,
|
|
|
|
|
true);
|
2010-11-15 16:33:49 +00:00
|
|
|
// If we failed to simplify this to a constant, let the target
|
|
|
|
|
// handle it.
|
|
|
|
|
if (Ret && !Res.getSymA() && !Res.getSymB())
|
|
|
|
|
return true;
|
|
|
|
|
}
|
2009-10-16 01:33:57 +00:00
|
|
|
|
2010-03-18 00:59:10 +00:00
|
|
|
Res = MCValue::get(SRE, 0, 0);
|
2009-06-29 20:40:36 +00:00
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
case Unary: {
|
2009-08-31 08:06:59 +00:00
|
|
|
const MCUnaryExpr *AUE = cast<MCUnaryExpr>(this);
|
2009-06-30 01:49:52 +00:00
|
|
|
MCValue Value;
|
2009-06-29 20:40:36 +00:00
|
|
|
|
2010-12-18 03:57:21 +00:00
|
|
|
if (!AUE->getSubExpr()->EvaluateAsRelocatableImpl(Value, Asm, Layout,
|
2010-12-07 00:27:36 +00:00
|
|
|
Addrs, InSet))
|
2009-06-29 20:40:36 +00:00
|
|
|
return false;
|
|
|
|
|
|
|
|
|
|
switch (AUE->getOpcode()) {
|
2009-08-31 08:06:59 +00:00
|
|
|
case MCUnaryExpr::LNot:
|
2009-07-01 06:48:00 +00:00
|
|
|
if (!Value.isAbsolute())
|
2009-06-30 01:49:52 +00:00
|
|
|
return false;
|
|
|
|
|
Res = MCValue::get(!Value.getConstant());
|
|
|
|
|
break;
|
2009-08-31 08:06:59 +00:00
|
|
|
case MCUnaryExpr::Minus:
|
2009-06-30 01:49:52 +00:00
|
|
|
/// -(a - b + const) ==> (b - a - const)
|
2009-08-11 17:47:52 +00:00
|
|
|
if (Value.getSymA() && !Value.getSymB())
|
2009-06-30 01:49:52 +00:00
|
|
|
return false;
|
2010-03-18 00:59:10 +00:00
|
|
|
Res = MCValue::get(Value.getSymB(), Value.getSymA(),
|
|
|
|
|
-Value.getConstant());
|
2009-06-30 01:49:52 +00:00
|
|
|
break;
|
2009-08-31 08:06:59 +00:00
|
|
|
case MCUnaryExpr::Not:
|
2009-07-01 06:48:00 +00:00
|
|
|
if (!Value.isAbsolute())
|
2009-06-30 01:49:52 +00:00
|
|
|
return false;
|
2010-03-18 00:59:10 +00:00
|
|
|
Res = MCValue::get(~Value.getConstant());
|
2009-06-30 01:49:52 +00:00
|
|
|
break;
|
2009-08-31 08:06:59 +00:00
|
|
|
case MCUnaryExpr::Plus:
|
2009-06-30 01:49:52 +00:00
|
|
|
Res = Value;
|
|
|
|
|
break;
|
2009-06-29 20:40:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
case Binary: {
|
2009-08-31 08:06:59 +00:00
|
|
|
const MCBinaryExpr *ABE = cast<MCBinaryExpr>(this);
|
2009-06-30 01:49:52 +00:00
|
|
|
MCValue LHSValue, RHSValue;
|
2010-03-18 00:59:10 +00:00
|
|
|
|
2010-12-18 03:57:21 +00:00
|
|
|
if (!ABE->getLHS()->EvaluateAsRelocatableImpl(LHSValue, Asm, Layout,
|
2010-12-07 00:27:36 +00:00
|
|
|
Addrs, InSet) ||
|
2010-12-18 03:57:21 +00:00
|
|
|
!ABE->getRHS()->EvaluateAsRelocatableImpl(RHSValue, Asm, Layout,
|
2010-12-07 00:27:36 +00:00
|
|
|
Addrs, InSet))
|
2009-06-29 20:40:36 +00:00
|
|
|
return false;
|
|
|
|
|
|
2009-06-30 01:49:52 +00:00
|
|
|
// We only support a few operations on non-constant expressions, handle
|
|
|
|
|
// those first.
|
2009-07-01 06:48:00 +00:00
|
|
|
if (!LHSValue.isAbsolute() || !RHSValue.isAbsolute()) {
|
2009-06-30 01:49:52 +00:00
|
|
|
switch (ABE->getOpcode()) {
|
|
|
|
|
default:
|
|
|
|
|
return false;
|
2009-08-31 08:06:59 +00:00
|
|
|
case MCBinaryExpr::Sub:
|
2009-06-30 02:08:27 +00:00
|
|
|
// Negate RHS and add.
|
2010-12-18 03:57:21 +00:00
|
|
|
return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
|
2009-06-30 02:08:27 +00:00
|
|
|
RHSValue.getSymB(), RHSValue.getSymA(),
|
|
|
|
|
-RHSValue.getConstant(),
|
|
|
|
|
Res);
|
|
|
|
|
|
2009-08-31 08:06:59 +00:00
|
|
|
case MCBinaryExpr::Add:
|
2010-12-18 03:57:21 +00:00
|
|
|
return EvaluateSymbolicAdd(Asm, Layout, Addrs, InSet, LHSValue,
|
2009-06-30 02:08:27 +00:00
|
|
|
RHSValue.getSymA(), RHSValue.getSymB(),
|
|
|
|
|
RHSValue.getConstant(),
|
|
|
|
|
Res);
|
2009-06-30 01:49:52 +00:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2009-06-29 20:40:36 +00:00
|
|
|
// FIXME: We need target hooks for the evaluation. It may be limited in
|
2010-02-08 23:58:47 +00:00
|
|
|
// width, and gas defines the result of comparisons and right shifts
|
|
|
|
|
// differently from Apple as.
|
2009-06-30 16:02:47 +00:00
|
|
|
int64_t LHS = LHSValue.getConstant(), RHS = RHSValue.getConstant();
|
|
|
|
|
int64_t Result = 0;
|
2009-06-29 20:40:36 +00:00
|
|
|
switch (ABE->getOpcode()) {
|
2009-08-31 08:06:59 +00:00
|
|
|
case MCBinaryExpr::Add: Result = LHS + RHS; break;
|
|
|
|
|
case MCBinaryExpr::And: Result = LHS & RHS; break;
|
|
|
|
|
case MCBinaryExpr::Div: Result = LHS / RHS; break;
|
|
|
|
|
case MCBinaryExpr::EQ: Result = LHS == RHS; break;
|
|
|
|
|
case MCBinaryExpr::GT: Result = LHS > RHS; break;
|
|
|
|
|
case MCBinaryExpr::GTE: Result = LHS >= RHS; break;
|
|
|
|
|
case MCBinaryExpr::LAnd: Result = LHS && RHS; break;
|
|
|
|
|
case MCBinaryExpr::LOr: Result = LHS || RHS; break;
|
|
|
|
|
case MCBinaryExpr::LT: Result = LHS < RHS; break;
|
|
|
|
|
case MCBinaryExpr::LTE: Result = LHS <= RHS; break;
|
|
|
|
|
case MCBinaryExpr::Mod: Result = LHS % RHS; break;
|
|
|
|
|
case MCBinaryExpr::Mul: Result = LHS * RHS; break;
|
|
|
|
|
case MCBinaryExpr::NE: Result = LHS != RHS; break;
|
|
|
|
|
case MCBinaryExpr::Or: Result = LHS | RHS; break;
|
|
|
|
|
case MCBinaryExpr::Shl: Result = LHS << RHS; break;
|
|
|
|
|
case MCBinaryExpr::Shr: Result = LHS >> RHS; break;
|
|
|
|
|
case MCBinaryExpr::Sub: Result = LHS - RHS; break;
|
|
|
|
|
case MCBinaryExpr::Xor: Result = LHS ^ RHS; break;
|
2009-06-29 20:40:36 +00:00
|
|
|
}
|
|
|
|
|
|
2009-06-30 01:49:52 +00:00
|
|
|
Res = MCValue::get(Result);
|
2009-06-29 20:40:36 +00:00
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2012-02-07 05:05:23 +00:00
|
|
|
llvm_unreachable("Invalid assembly expression kind!");
|
2009-08-31 08:07:22 +00:00
|
|
|
}
|
2011-04-29 18:00:03 +00:00
|
|
|
|
|
|
|
|
const MCSection *MCExpr::FindAssociatedSection() const {
|
|
|
|
|
switch (getKind()) {
|
|
|
|
|
case Target:
|
|
|
|
|
// We never look through target specific expressions.
|
|
|
|
|
return cast<MCTargetExpr>(this)->FindAssociatedSection();
|
|
|
|
|
|
|
|
|
|
case Constant:
|
|
|
|
|
return MCSymbol::AbsolutePseudoSection;
|
|
|
|
|
|
|
|
|
|
case SymbolRef: {
|
|
|
|
|
const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
|
|
|
|
|
const MCSymbol &Sym = SRE->getSymbol();
|
|
|
|
|
|
|
|
|
|
if (Sym.isDefined())
|
|
|
|
|
return &Sym.getSection();
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
case Unary:
|
|
|
|
|
return cast<MCUnaryExpr>(this)->getSubExpr()->FindAssociatedSection();
|
|
|
|
|
|
|
|
|
|
case Binary: {
|
|
|
|
|
const MCBinaryExpr *BE = cast<MCBinaryExpr>(this);
|
|
|
|
|
const MCSection *LHS_S = BE->getLHS()->FindAssociatedSection();
|
|
|
|
|
const MCSection *RHS_S = BE->getRHS()->FindAssociatedSection();
|
|
|
|
|
|
|
|
|
|
// If either section is absolute, return the other.
|
|
|
|
|
if (LHS_S == MCSymbol::AbsolutePseudoSection)
|
|
|
|
|
return RHS_S;
|
|
|
|
|
if (RHS_S == MCSymbol::AbsolutePseudoSection)
|
|
|
|
|
return LHS_S;
|
|
|
|
|
|
|
|
|
|
// Otherwise, return the first non-null section.
|
|
|
|
|
return LHS_S ? LHS_S : RHS_S;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2012-02-07 05:05:23 +00:00
|
|
|
llvm_unreachable("Invalid assembly expression kind!");
|
2011-04-29 18:00:03 +00:00
|
|
|
}
|
