[AsmPrinter] Prune dead code. NFC.

[oota-llvm.git] / lib / CodeGen / AsmPrinter / AsmPrinterDwarf.cpp

diff --git a/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp b/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
index 38ebedc9939b8e2df010dc6abd46f7e336fdc6ba..8efa03a88620e8fc7c8bcd87f65bbd2b0ecbc190 100644 (file)
--- a/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
@@ -47,7 +47,7 @@ void AsmPrinter::EmitSLEB128(int64_t Value, const char *Desc) const {
   OutStreamer->EmitSLEB128IntValue(Value);
 }
 
-/// EmitULEB128 - emit the specified signed leb128 value.
+/// EmitULEB128 - emit the specified unsigned leb128 value.
 void AsmPrinter::EmitULEB128(uint64_t Value, const char *Desc,
                              unsigned PadTo) const {
   if (isVerbose() && Desc)
@@ -56,18 +56,6 @@ void AsmPrinter::EmitULEB128(uint64_t Value, const char *Desc,
   OutStreamer->EmitULEB128IntValue(Value, PadTo);
 }
 
-/// EmitCFAByte - Emit a .byte 42 directive for a DW_CFA_xxx value.
-void AsmPrinter::EmitCFAByte(unsigned Val) const {
-  if (isVerbose()) {
-    if (Val >= dwarf::DW_CFA_offset && Val < dwarf::DW_CFA_offset + 64)
-      OutStreamer->AddComment("DW_CFA_offset + Reg (" +
-                              Twine(Val - dwarf::DW_CFA_offset) + ")");
-    else
-      OutStreamer->AddComment(dwarf::CallFrameString(Val));
-  }
-  OutStreamer->EmitIntValue(Val, 1);
-}
-
 static const char *DecodeDWARFEncoding(unsigned Encoding) {
   switch (Encoding) {
   case dwarf::DW_EH_PE_absptr:
@@ -134,7 +122,7 @@ unsigned AsmPrinter::GetSizeOfEncodedValue(unsigned Encoding) const {
   default:
     llvm_unreachable("Invalid encoded value.");
   case dwarf::DW_EH_PE_absptr:
-    return TM.getDataLayout()->getPointerSize();
+    return MF->getDataLayout().getPointerSize();
   case dwarf::DW_EH_PE_udata2:
     return 2;
   case dwarf::DW_EH_PE_udata4:
@@ -157,24 +145,20 @@ void AsmPrinter::EmitTTypeReference(const GlobalValue *GV,
     OutStreamer->EmitIntValue(0, GetSizeOfEncodedValue(Encoding));
 }
 
-/// EmitSectionOffset - Emit the 4-byte offset of Label from the start of its
-/// section.  This can be done with a special directive if the target supports
-/// it (e.g. cygwin) or by emitting it as an offset from a label at the start
-/// of the section.
-///
-/// SectionLabel is a temporary label emitted at the start of the section that
-/// Label lives in.
-void AsmPrinter::emitSectionOffset(const MCSymbol *Label) const {
-  // On COFF targets, we have to emit the special .secrel32 directive.
-  if (MAI->needsDwarfSectionOffsetDirective()) {
-    OutStreamer->EmitCOFFSecRel32(Label);
-    return;
-  }
+void AsmPrinter::emitDwarfSymbolReference(const MCSymbol *Label,
+                                          bool ForceOffset) const {
+  if (!ForceOffset) {
+    // On COFF targets, we have to emit the special .secrel32 directive.
+    if (MAI->needsDwarfSectionOffsetDirective()) {
+      OutStreamer->EmitCOFFSecRel32(Label);
+      return;
+    }
 
-  // If the format uses relocations with dwarf, refer to the symbol directly.
-  if (MAI->doesDwarfUseRelocationsAcrossSections()) {
-    OutStreamer->EmitSymbolValue(Label, 4);
-    return;
+    // If the format uses relocations with dwarf, refer to the symbol directly.
+    if (MAI->doesDwarfUseRelocationsAcrossSections()) {
+      OutStreamer->EmitSymbolValue(Label, 4);
+      return;
+    }
   }
 
   // Otherwise, emit it as a label difference from the start of the section.
@@ -183,7 +167,7 @@ void AsmPrinter::emitSectionOffset(const MCSymbol *Label) const {
 
 void AsmPrinter::emitDwarfStringOffset(DwarfStringPoolEntryRef S) const {
   if (MAI->doesDwarfUseRelocationsAcrossSections()) {
-    emitSectionOffset(S.getSymbol());
+    emitDwarfSymbolReference(S.getSymbol());
     return;
   }
 
@@ -250,6 +234,12 @@ void AsmPrinter::emitCFIInstruction(const MCCFIInstruction &Inst) const {
   case MCCFIInstruction::OpSameValue:
     OutStreamer->EmitCFISameValue(Inst.getRegister());
     break;
+  case MCCFIInstruction::OpGnuArgsSize:
+    OutStreamer->EmitCFIGnuArgsSize(Inst.getOffset());
+    break;
+  case MCCFIInstruction::OpEscape:
+    OutStreamer->EmitCFIEscape(Inst.getValues());
+    break;
   }
 }
 
@@ -262,29 +252,26 @@ void AsmPrinter::emitDwarfDIE(const DIE &Die) const {
                             dwarf::TagString(Die.getTag()));
   EmitULEB128(Die.getAbbrevNumber());
 
-  const SmallVectorImpl<DIEValue> &Values = Die.getValues();
-
   // Emit the DIE attribute values.
-  for (unsigned i = 0, N = Values.size(); i < N; ++i) {
-    dwarf::Attribute Attr = Values[i].getAttribute();
-    dwarf::Form Form = Values[i].getForm();
-    assert(Form && "Too many attributes for DIE (check abbreviation)");
+  for (const auto &V : Die.values()) {
+    dwarf::Attribute Attr = V.getAttribute();
+    assert(V.getForm() && "Too many attributes for DIE (check abbreviation)");
 
     if (isVerbose()) {
       OutStreamer->AddComment(dwarf::AttributeString(Attr));
       if (Attr == dwarf::DW_AT_accessibility)
         OutStreamer->AddComment(
-            dwarf::AccessibilityString(Values[i].getDIEInteger().getValue()));
+            dwarf::AccessibilityString(V.getDIEInteger().getValue()));
     }
 
     // Emit an attribute using the defined form.
-    Values[i].EmitValue(this, Form);
+    V.EmitValue(this);
   }
 
   // Emit the DIE children if any.
   if (Die.hasChildren()) {
-    for (auto &Child : Die.getChildren())
-      emitDwarfDIE(*Child);
+    for (auto &Child : Die.children())
+      emitDwarfDIE(Child);
 
     OutStreamer->AddComment("End Of Children Mark");
     EmitInt8(0);
@@ -293,9 +280,9 @@ void AsmPrinter::emitDwarfDIE(const DIE &Die) const {
 
 void
 AsmPrinter::emitDwarfAbbrevs(const std::vector<DIEAbbrev *>& Abbrevs) const {
-  // For each abbrevation.
+  // For each abbreviation.
   for (const DIEAbbrev *Abbrev : Abbrevs) {
-    // Emit the abbrevations code (base 1 index.)
+    // Emit the abbreviations code (base 1 index.)
     EmitULEB128(Abbrev->getNumber(), "Abbreviation Code");
 
     // Emit the abbreviations data.