#include "llvm/GlobalVariable.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/Mangler.h"
#include "llvm/Target/TargetData.h"
// Generic Code
//===----------------------------------------------------------------------===//
-TargetLoweringObjectFile::TargetLoweringObjectFile() : Ctx(0) {
- TextSection = 0;
- DataSection = 0;
- BSSSection = 0;
- ReadOnlySection = 0;
- StaticCtorSection = 0;
- StaticDtorSection = 0;
- LSDASection = 0;
- EHFrameSection = 0;
-
- DwarfAbbrevSection = 0;
- DwarfInfoSection = 0;
- DwarfLineSection = 0;
- DwarfFrameSection = 0;
- DwarfPubNamesSection = 0;
- DwarfPubTypesSection = 0;
- DwarfDebugInlineSection = 0;
- DwarfStrSection = 0;
- DwarfLocSection = 0;
- DwarfARangesSection = 0;
- DwarfRangesSection = 0;
- DwarfMacroInfoSection = 0;
-
- IsFunctionEHSymbolGlobal = false;
- IsFunctionEHFrameSymbolPrivate = true;
- SupportsWeakOmittedEHFrame = true;
+/// Initialize - this method must be called before any actual lowering is
+/// done. This specifies the current context for codegen, and gives the
+/// lowering implementations a chance to set up their default sections.
+void TargetLoweringObjectFile::Initialize(MCContext &ctx,
+ const TargetMachine &TM) {
+ Ctx = &ctx;
+ InitMCObjectFileInfo(TM.getTargetTriple(), TM.getRelocationModel(), *Ctx);
}
-
+
TargetLoweringObjectFile::~TargetLoweringObjectFile() {
}
static bool isSuitableForBSS(const GlobalVariable *GV) {
- Constant *C = GV->getInitializer();
+ const Constant *C = GV->getInitializer();
// Must have zero initializer.
if (!C->isNullValue())
/// known to have a type that is an array of 1/2/4 byte elements) ends with a
/// nul value and contains no other nuls in it.
static bool IsNullTerminatedString(const Constant *C) {
-
const ArrayType *ATy = cast<ArrayType>(C->getType());
+ ArrayType *ATy = cast<ArrayType>(C->getType());
// First check: is we have constant array of i8 terminated with zero
if (const ConstantArray *CVA = dyn_cast<ConstantArray>(C)) {
ConstantInt *Null =
dyn_cast<ConstantInt>(CVA->getOperand(ATy->getNumElements()-1));
- if (Null == 0 || Null->getZExtValue() != 0)
+ if (Null == 0 || !Null->isZero())
return false; // Not null terminated.
// Verify that the null doesn't occur anywhere else in the string.
return false;
}
+MCSymbol *TargetLoweringObjectFile::
+getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
+ MachineModuleInfo *MMI) const {
+ return Mang->getSymbol(GV);
+}
+
+void TargetLoweringObjectFile::emitPersonalityValue(MCStreamer &Streamer,
+ const TargetMachine &TM,
+ const MCSymbol *Sym) const {
+}
+
+
/// getKindForGlobal - This is a top-level target-independent classifier for
/// a global variable. Given an global variable and information from TM, it
/// classifies the global in a variety of ways that make various target
return SectionKind::getBSS();
}
- Constant *C = GVar->getInitializer();
+ const Constant *C = GVar->getInitializer();
// If the global is marked constant, we can put it into a mergable section,
// a mergable string section, or general .data if it contains relocations.
switch (C->getRelocationInfo()) {
default: assert(0 && "unknown relocation info kind");
case Constant::NoRelocation:
+ // If the global is required to have a unique address, it can't be put
+ // into a mergable section: just drop it into the general read-only
+ // section instead.
+ if (!GVar->hasUnnamedAddr())
+ return SectionKind::getReadOnly();
+
// If initializer is a null-terminated string, put it in a "cstring"
// section of the right width.
- if (
const ArrayType *ATy = dyn_cast<ArrayType>(C->getType())) {
- if (const IntegerType *ITy =
+ if (ArrayType *ATy = dyn_cast<ArrayType>(C->getType())) {
+ if (IntegerType *ITy =
dyn_cast<IntegerType>(ATy->getElementType())) {
if ((ITy->getBitWidth() == 8 || ITy->getBitWidth() == 16 ||
ITy->getBitWidth() == 32) &&
return DataSection;
}
-/// getSymbolForDwarfGlobalReference - Return an MCExpr to use for a
+/// getExprForDwarfGlobalReference - Return an MCExpr to use for a
/// reference to the specified global variable from exception
/// handling information.
const MCExpr *TargetLoweringObjectFile::
-getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
- MachineModuleInfo *MMI, unsigned Encoding) const {
- // FIXME: Use GetGlobalValueSymbol.
- SmallString<128> Name;
- Mang->getNameWithPrefix(Name, GV, false);
- const MCSymbol *Sym;
-
- if (GV->hasPrivateLinkage())
- Sym = getContext().GetOrCreateTemporarySymbol(Name.str());
- else
- Sym = getContext().GetOrCreateSymbol(Name.str());
-
- return getSymbolForDwarfReference(Sym, MMI, Encoding);
+getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
+ MachineModuleInfo *MMI, unsigned Encoding,
+ MCStreamer &Streamer) const {
+ const MCSymbol *Sym = Mang->getSymbol(GV);
+ return getExprForDwarfReference(Sym, Encoding, Streamer);
}
const MCExpr *TargetLoweringObjectFile::
-getSymbolForDwarfReference(const MCSymbol *Sym, MachineModuleInfo *MMI,
- unsigned Encoding) const {
+getExprForDwarfReference(const MCSymbol *Sym, unsigned Encoding,
+ MCStreamer &Streamer) const {
const MCExpr *Res = MCSymbolRefExpr::Create(Sym, getContext());
- switch (Encoding & 0xF0) {
+ switch (Encoding & 0x70) {
default:
- llvm_report_error("We do not support this DWARF encoding yet!");
- break;
+ report_fatal_error("We do not support this DWARF encoding yet!");
case dwarf::DW_EH_PE_absptr:
// Do nothing special
- break;
- case dwarf::DW_EH_PE_pcrel:
- // FIXME: PCSymbol
- const MCExpr *PC = MCSymbolRefExpr::Create(".", getContext());
- Res = MCBinaryExpr::CreateSub(Res, PC, getContext());
- break;
+ return Res;
+ case dwarf::DW_EH_PE_pcrel: {
+ // Emit a label to the streamer for the current position. This gives us
+ // .-foo addressing.
+ MCSymbol *PCSym = getContext().CreateTempSymbol();
+ Streamer.EmitLabel(PCSym);
+ const MCExpr *PC = MCSymbolRefExpr::Create(PCSym, getContext());
+ return MCBinaryExpr::CreateSub(Res, PC, getContext());
+ }
}
-
- return Res;
}
unsigned TargetLoweringObjectFile::getPersonalityEncoding() const {
return dwarf::DW_EH_PE_absptr;
}
-unsigned TargetLoweringObjectFile::getFDEEncoding() const {
+unsigned TargetLoweringObjectFile::getFDEEncoding(bool CFI) const {
return dwarf::DW_EH_PE_absptr;
}
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