1. Make MCSection an abstract class.

2. Move section switch printing to MCSection virtual method which takes a
   TAI.  This eliminates textual formatting stuff from TLOF.
3. Eliminate SwitchToSectionDirective, getSectionFlagsAsString, and 
   TLOFELF::AtIsCommentChar.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78510 91177308-0d34-0410-b5e6-96231b3b80d8

lib/MC/MCSection.cpp

@@ -9,8 +9,14 @@
 
 #include "llvm/MC/MCSection.h"
 #include "llvm/MC/MCContext.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
+//===----------------------------------------------------------------------===//
+// MCSection
+//===----------------------------------------------------------------------===//
+
 MCSection::~MCSection() {
 }
 
@@ -22,26 +28,124 @@ MCSection::MCSection(const StringRef &N, bool isDirective, SectionKind K,
   Entry = this;
 }
 
-MCSection *MCSection::
-Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) {
-  return new (Ctx) MCSection(Name, IsDirective, K, Ctx);
-}
-
+//===----------------------------------------------------------------------===//
+// MCSectionELF
+//===----------------------------------------------------------------------===//
 
 MCSectionELF *MCSectionELF::
 Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) {
   return new (Ctx) MCSectionELF(Name, IsDirective, K, Ctx);
 }
 
+void MCSectionELF::PrintSwitchToSection(const TargetAsmInfo &TAI,
+                                        raw_ostream &OS) const {
+  if (isDirective()) {
+    OS << getName() << '\n';
+    return;
+  }
+
+  OS << "\t.section\t" << getName();
+  
+  // Handle the weird solaris syntax if desired.
+  if (TAI.usesSunStyleELFSectionSwitchSyntax() &&
+      !getKind().isMergeableConst() && !getKind().isMergeableCString()) {
+    if (!getKind().isMetadata())
+      OS << ",#alloc";
+    if (getKind().isText())
+      OS << ",#execinstr";
+    if (getKind().isWriteable())
+      OS << ",#write";
+    if (getKind().isThreadLocal())
+      OS << ",#tls";
+  } else {
+    OS << ",\"";
+  
+    if (!getKind().isMetadata())
+      OS << 'a';
+    if (getKind().isText())
+      OS << 'x';
+    if (getKind().isWriteable())
+      OS << 'w';
+    if (getKind().isMergeable1ByteCString() ||
+        getKind().isMergeable2ByteCString() ||
+        getKind().isMergeable4ByteCString() ||
+        getKind().isMergeableConst4() ||
+        getKind().isMergeableConst8() ||
+        getKind().isMergeableConst16())
+      OS << 'M';
+    if (getKind().isMergeable1ByteCString() ||
+        getKind().isMergeable2ByteCString() ||
+        getKind().isMergeable4ByteCString())
+      OS << 'S';
+    if (getKind().isThreadLocal())
+      OS << 'T';
+    
+    OS << "\",";
+    
+    // If comment string is '@', e.g. as on ARM - use '%' instead
+    if (TAI.getCommentString()[0] == '@')
+      OS << '%';
+    else
+      OS << '@';
+    
+    if (getKind().isBSS() || getKind().isThreadBSS())
+      OS << "nobits";
+    else
+      OS << "progbits";
+    
+    if (getKind().isMergeable1ByteCString()) {
+      OS << ",1";
+    } else if (getKind().isMergeable2ByteCString()) {
+      OS << ",2";
+    } else if (getKind().isMergeable4ByteCString()) {
+      OS << ",4";
+    } else if (getKind().isMergeableConst4()) {
+      OS << ",4";
+    } else if (getKind().isMergeableConst8()) {
+      OS << ",8";
+    } else if (getKind().isMergeableConst16()) {
+      OS << ",16";
+    }
+  }
+}
+
+//===----------------------------------------------------------------------===//
+// MCSectionMachO
+//===----------------------------------------------------------------------===//
 
 MCSectionMachO *MCSectionMachO::
 Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) {
   return new (Ctx) MCSectionMachO(Name, IsDirective, K, Ctx);
 }
 
+void MCSectionMachO::PrintSwitchToSection(const TargetAsmInfo &TAI,
+                                          raw_ostream &OS) const {
+  if (!isDirective())
+    OS << "\t.section\t" << getName() << '\n';
+  else
+    OS << getName() << '\n';
+}
+
+//===----------------------------------------------------------------------===//
+// MCSectionCOFF
+//===----------------------------------------------------------------------===//
 
 MCSectionCOFF *MCSectionCOFF::
 Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) {
   return new (Ctx) MCSectionCOFF(Name, IsDirective, K, Ctx);
 }
 
+void MCSectionCOFF::PrintSwitchToSection(const TargetAsmInfo &TAI,
+                                         raw_ostream &OS) const {
+  
+  if (isDirective()) {
+    OS << getName() << '\n';
+    return;
+  }
+  OS << "\t.section\t" << getName() << ",\"";
+  if (getKind().isText())
+    OS << 'x';
+  if (getKind().isWriteable())
+    OS << 'w';
+  OS << "\"\n";
+}