summaryrefslogtreecommitdiffstats
path: root/contrib/llvm/lib/MC/MCDwarf.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/llvm/lib/MC/MCDwarf.cpp')
-rw-r--r--contrib/llvm/lib/MC/MCDwarf.cpp95
1 files changed, 51 insertions, 44 deletions
diff --git a/contrib/llvm/lib/MC/MCDwarf.cpp b/contrib/llvm/lib/MC/MCDwarf.cpp
index ad86db1..4658a30 100644
--- a/contrib/llvm/lib/MC/MCDwarf.cpp
+++ b/contrib/llvm/lib/MC/MCDwarf.cpp
@@ -7,17 +7,18 @@
//
//===----------------------------------------------------------------------===//
-#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCDwarf.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCObjectWriter.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
@@ -196,7 +197,7 @@ static inline void EmitDwarfLineTable(MCStreamer *MCOS,
MCOS->EmitLabel(SectionEnd);
// Switch back the the dwarf line section.
- MCOS->SwitchSection(context.getTargetAsmInfo().getDwarfLineSection());
+ MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfLineSection());
const MCAsmInfo &asmInfo = MCOS->getContext().getAsmInfo();
MCOS->EmitDwarfAdvanceLineAddr(INT64_MAX, LastLabel, SectionEnd,
@@ -209,7 +210,7 @@ static inline void EmitDwarfLineTable(MCStreamer *MCOS,
void MCDwarfFileTable::Emit(MCStreamer *MCOS) {
MCContext &context = MCOS->getContext();
// Switch to the section where the table will be emitted into.
- MCOS->SwitchSection(context.getTargetAsmInfo().getDwarfLineSection());
+ MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfLineSection());
// Create a symbol at the beginning of this section.
MCSymbol *LineStartSym = context.CreateTempSymbol();
@@ -485,11 +486,11 @@ static void EmitPersonality(MCStreamer &streamer, const MCSymbol &symbol,
}
static const MachineLocation TranslateMachineLocation(
- const TargetAsmInfo &TAI,
+ const MCRegisterInfo &MRI,
const MachineLocation &Loc) {
unsigned Reg = Loc.getReg() == MachineLocation::VirtualFP ?
MachineLocation::VirtualFP :
- unsigned(TAI.getDwarfRegNum(Loc.getReg(), true));
+ unsigned(MRI.getDwarfRegNum(Loc.getReg(), true));
const MachineLocation &NewLoc = Loc.isReg() ?
MachineLocation(Reg) : MachineLocation(Reg, Loc.getOffset());
return NewLoc;
@@ -503,10 +504,11 @@ namespace {
bool IsEH;
const MCSymbol *SectionStart;
public:
- FrameEmitterImpl(bool usingCFI, bool isEH, const MCSymbol *sectionStart) :
- CFAOffset(0), CIENum(0), UsingCFI(usingCFI), IsEH(isEH),
- SectionStart(sectionStart) {
- }
+ FrameEmitterImpl(bool usingCFI, bool isEH)
+ : CFAOffset(0), CIENum(0), UsingCFI(usingCFI), IsEH(isEH),
+ SectionStart(0) {}
+
+ void setSectionStart(const MCSymbol *Label) { SectionStart = Label; }
/// EmitCompactUnwind - Emit the unwind information in a compact way. If
/// we're successful, return 'true'. Otherwise, return 'false' and it will
@@ -687,11 +689,8 @@ void FrameEmitterImpl::EmitCFIInstructions(MCStreamer &streamer,
/// normal CIE and FDE.
bool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer,
const MCDwarfFrameInfo &Frame) {
-#if 1
- return false;
-#else
MCContext &Context = Streamer.getContext();
- const TargetAsmInfo &TAI = Context.getTargetAsmInfo();
+ const MCObjectFileInfo *MOFI = Context.getObjectFileInfo();
bool VerboseAsm = Streamer.isVerboseAsm();
// range-start range-length compact-unwind-enc personality-func lsda
@@ -716,19 +715,17 @@ bool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer,
// .quad __gxx_personality
// .quad except_tab1
- uint32_t Encoding =
- TAI.getCompactUnwindEncoding(Frame.Instructions,
- getDataAlignmentFactor(Streamer), IsEH);
+ uint32_t Encoding = Frame.CompactUnwindEncoding;
if (!Encoding) return false;
// The encoding needs to know we have an LSDA.
if (Frame.Lsda)
Encoding |= 0x40000000;
- Streamer.SwitchSection(TAI.getCompactUnwindSection());
+ Streamer.SwitchSection(MOFI->getCompactUnwindSection());
// Range Start
- unsigned FDEEncoding = TAI.getFDEEncoding(UsingCFI);
+ unsigned FDEEncoding = MOFI->getFDEEncoding(UsingCFI);
unsigned Size = getSizeForEncoding(Streamer, FDEEncoding);
if (VerboseAsm) Streamer.AddComment("Range Start");
Streamer.EmitSymbolValue(Frame.Function, Size);
@@ -745,6 +742,7 @@ bool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer,
Twine(llvm::utohexstr(Encoding)));
Streamer.EmitIntValue(Encoding, Size);
+
// Personality Function
Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_absptr);
if (VerboseAsm) Streamer.AddComment("Personality Function");
@@ -762,7 +760,6 @@ bool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer,
Streamer.EmitIntValue(0, Size); // No LSDA
return true;
-#endif
}
const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer,
@@ -771,11 +768,12 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer,
const MCSymbol *lsda,
unsigned lsdaEncoding) {
MCContext &context = streamer.getContext();
- const TargetAsmInfo &TAI = context.getTargetAsmInfo();
+ const MCRegisterInfo &MRI = context.getRegisterInfo();
+ const MCObjectFileInfo *MOFI = context.getObjectFileInfo();
bool verboseAsm = streamer.isVerboseAsm();
MCSymbol *sectionStart;
- if (TAI.isFunctionEHFrameSymbolPrivate() || !IsEH)
+ if (MOFI->isFunctionEHFrameSymbolPrivate() || !IsEH)
sectionStart = context.CreateTempSymbol();
else
sectionStart = context.GetOrCreateSymbol(Twine("EH_frame") + Twine(CIENum));
@@ -824,7 +822,7 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer,
// Return Address Register
if (verboseAsm) streamer.AddComment("CIE Return Address Column");
- streamer.EmitULEB128IntValue(TAI.getDwarfRARegNum(true));
+ streamer.EmitULEB128IntValue(MRI.getDwarfRegNum(MRI.getRARegister(), true));
// Augmentation Data Length (optional)
@@ -858,21 +856,22 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer,
EmitEncodingByte(streamer, lsdaEncoding, "LSDA Encoding");
// Encoding of the FDE pointers
- EmitEncodingByte(streamer, TAI.getFDEEncoding(UsingCFI),
+ EmitEncodingByte(streamer, MOFI->getFDEEncoding(UsingCFI),
"FDE Encoding");
}
// Initial Instructions
- const std::vector<MachineMove> &Moves = TAI.getInitialFrameState();
+ const MCAsmInfo &MAI = context.getAsmInfo();
+ const std::vector<MachineMove> &Moves = MAI.getInitialFrameState();
std::vector<MCCFIInstruction> Instructions;
for (int i = 0, n = Moves.size(); i != n; ++i) {
MCSymbol *Label = Moves[i].getLabel();
const MachineLocation &Dst =
- TranslateMachineLocation(TAI, Moves[i].getDestination());
+ TranslateMachineLocation(MRI, Moves[i].getDestination());
const MachineLocation &Src =
- TranslateMachineLocation(TAI, Moves[i].getSource());
+ TranslateMachineLocation(MRI, Moves[i].getSource());
MCCFIInstruction Inst(Label, Dst, Src);
Instructions.push_back(Inst);
}
@@ -893,10 +892,10 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer,
MCContext &context = streamer.getContext();
MCSymbol *fdeStart = context.CreateTempSymbol();
MCSymbol *fdeEnd = context.CreateTempSymbol();
- const TargetAsmInfo &TAI = context.getTargetAsmInfo();
+ const MCObjectFileInfo *MOFI = context.getObjectFileInfo();
bool verboseAsm = streamer.isVerboseAsm();
- if (!TAI.isFunctionEHFrameSymbolPrivate() && IsEH) {
+ if (IsEH && frame.Function && !MOFI->isFunctionEHFrameSymbolPrivate()) {
MCSymbol *EHSym =
context.GetOrCreateSymbol(frame.Function->getName() + Twine(".eh"));
streamer.EmitEHSymAttributes(frame.Function, EHSym);
@@ -925,7 +924,7 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer,
streamer.EmitSymbolValue(&cieStart, 4);
}
- unsigned fdeEncoding = TAI.getFDEEncoding(UsingCFI);
+ unsigned fdeEncoding = MOFI->getFDEEncoding(UsingCFI);
unsigned size = getSizeForEncoding(streamer, fdeEncoding);
// PC Begin
@@ -1011,26 +1010,34 @@ void MCDwarfFrameEmitter::Emit(MCStreamer &Streamer,
bool UsingCFI,
bool IsEH) {
MCContext &Context = Streamer.getContext();
- const TargetAsmInfo &TAI = Context.getTargetAsmInfo();
- const MCSection &Section = IsEH ? *TAI.getEHFrameSection() :
- *TAI.getDwarfFrameSection();
+ MCObjectFileInfo *MOFI =
+ const_cast<MCObjectFileInfo*>(Context.getObjectFileInfo());
+ FrameEmitterImpl Emitter(UsingCFI, IsEH);
+ ArrayRef<MCDwarfFrameInfo> FrameArray = Streamer.getFrameInfos();
+
+ // Emit the compact unwind info if available.
+ // FIXME: This emits both the compact unwind and the old CIE/FDE
+ // information. Only one of those is needed.
+ if (IsEH && MOFI->getCompactUnwindSection())
+ for (unsigned i = 0, n = Streamer.getNumFrameInfos(); i < n; ++i) {
+ const MCDwarfFrameInfo &Frame = Streamer.getFrameInfo(i);
+ if (!Frame.CompactUnwindEncoding)
+ Emitter.EmitCompactUnwind(Streamer, Frame);
+ }
+
+ const MCSection &Section = IsEH ? *MOFI->getEHFrameSection() :
+ *MOFI->getDwarfFrameSection();
Streamer.SwitchSection(&Section);
MCSymbol *SectionStart = Context.CreateTempSymbol();
Streamer.EmitLabel(SectionStart);
+ Emitter.setSectionStart(SectionStart);
MCSymbol *FDEEnd = NULL;
DenseMap<CIEKey, const MCSymbol*> CIEStarts;
- FrameEmitterImpl Emitter(UsingCFI, IsEH, SectionStart);
const MCSymbol *DummyDebugKey = NULL;
- for (unsigned i = 0, n = Streamer.getNumFrameInfos(); i < n; ++i) {
- const MCDwarfFrameInfo &Frame = Streamer.getFrameInfo(i);
- if (IsEH && TAI.getCompactUnwindSection() &&
- Emitter.EmitCompactUnwind(Streamer, Frame)) {
- FDEEnd = NULL;
- continue;
- }
-
+ for (unsigned i = 0, n = FrameArray.size(); i < n; ++i) {
+ const MCDwarfFrameInfo &Frame = FrameArray[i];
CIEKey Key(Frame.Personality, Frame.PersonalityEncoding,
Frame.LsdaEncoding);
const MCSymbol *&CIEStart = IsEH ? CIEStarts[Key] : DummyDebugKey;
OpenPOWER on IntegriCloud