LCOV - code coverage report
Current view: top level - lib/Target/AArch64/MCTargetDesc - AArch64MCExpr.cpp (source / functions) Hit Total Coverage
Test: llvm-toolchain.info Lines: 66 75 88.0 %
Date: 2018-02-23 15:42:53 Functions: 7 8 87.5 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : //===-- AArch64MCExpr.cpp - AArch64 specific MC expression classes --------===//
       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             : //
      10             : // This file contains the implementation of the assembly expression modifiers
      11             : // accepted by the AArch64 architecture (e.g. ":lo12:", ":gottprel_g1:", ...).
      12             : //
      13             : //===----------------------------------------------------------------------===//
      14             : 
      15             : #include "AArch64MCExpr.h"
      16             : #include "llvm/MC/MCContext.h"
      17             : #include "llvm/MC/MCStreamer.h"
      18             : #include "llvm/MC/MCSymbolELF.h"
      19             : #include "llvm/MC/MCValue.h"
      20             : #include "llvm/Object/ELF.h"
      21             : #include "llvm/Support/ErrorHandling.h"
      22             : 
      23             : using namespace llvm;
      24             : 
      25             : #define DEBUG_TYPE "aarch64symbolrefexpr"
      26             : 
      27        8515 : const AArch64MCExpr *AArch64MCExpr::create(const MCExpr *Expr, VariantKind Kind,
      28             :                                        MCContext &Ctx) {
      29        8515 :   return new (Ctx) AArch64MCExpr(Expr, Kind);
      30             : }
      31             : 
      32        8138 : StringRef AArch64MCExpr::getVariantKindName() const {
      33        8138 :   switch (static_cast<uint32_t>(getKind())) {
      34        1331 :   case VK_CALL:                return "";
      35        3185 :   case VK_LO12:                return ":lo12:";
      36          40 :   case VK_ABS_G3:              return ":abs_g3:";
      37           5 :   case VK_ABS_G2:              return ":abs_g2:";
      38           4 :   case VK_ABS_G2_S:            return ":abs_g2_s:";
      39          37 :   case VK_ABS_G2_NC:           return ":abs_g2_nc:";
      40           5 :   case VK_ABS_G1:              return ":abs_g1:";
      41           8 :   case VK_ABS_G1_S:            return ":abs_g1_s:";
      42          37 :   case VK_ABS_G1_NC:           return ":abs_g1_nc:";
      43           5 :   case VK_ABS_G0:              return ":abs_g0:";
      44           8 :   case VK_ABS_G0_S:            return ":abs_g0_s:";
      45          37 :   case VK_ABS_G0_NC:           return ":abs_g0_nc:";
      46          12 :   case VK_DTPREL_G2:           return ":dtprel_g2:";
      47          14 :   case VK_DTPREL_G1:           return ":dtprel_g1:";
      48           8 :   case VK_DTPREL_G1_NC:        return ":dtprel_g1_nc:";
      49          14 :   case VK_DTPREL_G0:           return ":dtprel_g0:";
      50           8 :   case VK_DTPREL_G0_NC:        return ":dtprel_g0_nc:";
      51           8 :   case VK_DTPREL_HI12:         return ":dtprel_hi12:";
      52          78 :   case VK_DTPREL_LO12:         return ":dtprel_lo12:";
      53          88 :   case VK_DTPREL_LO12_NC:      return ":dtprel_lo12_nc:";
      54           8 :   case VK_TPREL_G2:            return ":tprel_g2:";
      55          14 :   case VK_TPREL_G1:            return ":tprel_g1:";
      56           8 :   case VK_TPREL_G1_NC:         return ":tprel_g1_nc:";
      57          14 :   case VK_TPREL_G0:            return ":tprel_g0:";
      58           8 :   case VK_TPREL_G0_NC:         return ":tprel_g0_nc:";
      59           8 :   case VK_TPREL_HI12:          return ":tprel_hi12:";
      60          78 :   case VK_TPREL_LO12:          return ":tprel_lo12:";
      61          88 :   case VK_TPREL_LO12_NC:       return ":tprel_lo12_nc:";
      62          58 :   case VK_TLSDESC_LO12:        return ":tlsdesc_lo12:";
      63        2700 :   case VK_ABS_PAGE:            return "";
      64           0 :   case VK_ABS_PAGE_NC:         return ":pg_hi21_nc:";
      65          63 :   case VK_GOT_PAGE:            return ":got:";
      66          69 :   case VK_GOT_LO12:            return ":got_lo12:";
      67          18 :   case VK_GOTTPREL_PAGE:       return ":gottprel:";
      68          20 :   case VK_GOTTPREL_LO12_NC:    return ":gottprel_lo12:";
      69           6 :   case VK_GOTTPREL_G1:         return ":gottprel_g1:";
      70           6 :   case VK_GOTTPREL_G0_NC:      return ":gottprel_g0_nc:";
      71          17 :   case VK_TLSDESC:             return "";
      72          23 :   case VK_TLSDESC_PAGE:        return ":tlsdesc:";
      73           0 :   default:
      74           0 :     llvm_unreachable("Invalid ELF symbol kind");
      75             :   }
      76             : }
      77             : 
      78        8138 : void AArch64MCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
      79        8138 :   if (getKind() != VK_NONE)
      80        8138 :     OS << getVariantKindName();
      81        8138 :   Expr->print(OS, MAI);
      82        8138 : }
      83             : 
      84         690 : void AArch64MCExpr::visitUsedExpr(MCStreamer &Streamer) const {
      85         690 :   Streamer.visitUsedExpr(*getSubExpr());
      86         690 : }
      87             : 
      88           0 : MCFragment *AArch64MCExpr::findAssociatedFragment() const {
      89           0 :   llvm_unreachable("FIXME: what goes here?");
      90             : }
      91             : 
      92         690 : bool AArch64MCExpr::evaluateAsRelocatableImpl(MCValue &Res,
      93             :                                               const MCAsmLayout *Layout,
      94             :                                               const MCFixup *Fixup) const {
      95         690 :   if (!getSubExpr()->evaluateAsRelocatable(Res, Layout, Fixup))
      96             :     return false;
      97             : 
      98         690 :   Res =
      99         690 :       MCValue::get(Res.getSymA(), Res.getSymB(), Res.getConstant(), getKind());
     100             : 
     101         690 :   return true;
     102             : }
     103             : 
     104         354 : static void fixELFSymbolsInTLSFixupsImpl(const MCExpr *Expr, MCAssembler &Asm) {
     105         364 :   switch (Expr->getKind()) {
     106           0 :   case MCExpr::Target:
     107           0 :     llvm_unreachable("Can't handle nested target expression");
     108             :     break;
     109             :   case MCExpr::Constant:
     110             :     break;
     111             : 
     112             :   case MCExpr::Binary: {
     113             :     const MCBinaryExpr *BE = cast<MCBinaryExpr>(Expr);
     114          10 :     fixELFSymbolsInTLSFixupsImpl(BE->getLHS(), Asm);
     115          10 :     fixELFSymbolsInTLSFixupsImpl(BE->getRHS(), Asm);
     116          10 :     break;
     117             :   }
     118             : 
     119             :   case MCExpr::SymbolRef: {
     120             :     // We're known to be under a TLS fixup, so any symbol should be
     121             :     // modified. There should be only one.
     122             :     const MCSymbolRefExpr &SymRef = *cast<MCSymbolRefExpr>(Expr);
     123         344 :     cast<MCSymbolELF>(SymRef.getSymbol()).setType(ELF::STT_TLS);
     124         344 :     break;
     125             :   }
     126             : 
     127             :   case MCExpr::Unary:
     128           0 :     fixELFSymbolsInTLSFixupsImpl(cast<MCUnaryExpr>(Expr)->getSubExpr(), Asm);
     129           0 :     break;
     130             :   }
     131         354 : }
     132             : 
     133         681 : void AArch64MCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {
     134         681 :   switch (getSymbolLoc(Kind)) {
     135             :   default:
     136             :     return;
     137             :   case VK_DTPREL:
     138             :   case VK_GOTTPREL:
     139             :   case VK_TPREL:
     140             :   case VK_TLSDESC:
     141             :     break;
     142             :   }
     143             : 
     144         344 :   fixELFSymbolsInTLSFixupsImpl(getSubExpr(), Asm);
     145             : }

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