[MC/AsmParser] Avoid setting MCSymbol.IsUsed in some cases

[oota-llvm.git] / lib / MC / MCSectionCOFF.cpp

diff --git a/lib/MC/MCSectionCOFF.cpp b/lib/MC/MCSectionCOFF.cpp
index d15146654ebf8c4a2afcc688aa5c29dda3c736c9..ce0b4f5fb411ea12d1f8bd1aaa5c24bf9f975334 100644 (file)
--- a/lib/MC/MCSectionCOFF.cpp
+++ b/lib/MC/MCSectionCOFF.cpp
@@ -20,7 +20,9 @@ MCSectionCOFF::~MCSectionCOFF() {} // anchor.
 // should be printed before the section name
 bool MCSectionCOFF::ShouldOmitSectionDirective(StringRef Name,
                                                const MCAsmInfo &MAI) const {
-  
+  if (COMDATSymbol)
+    return false;
+
   // FIXME: Does .section .bss/.data/.text work everywhere??
   if (Name == ".text" || Name == ".data" || Name == ".bss")
     return true;
@@ -28,22 +30,79 @@ bool MCSectionCOFF::ShouldOmitSectionDirective(StringRef Name,
   return false;
 }
 
+void MCSectionCOFF::setSelection(int Selection) const {
+  assert(Selection != 0 && "invalid COMDAT selection type");
+  this->Selection = Selection;
+  Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
+}
+
 void MCSectionCOFF::PrintSwitchToSection(const MCAsmInfo &MAI,
-                                         raw_ostream &OS) const {
-  
+                                         raw_ostream &OS,
+                                         const MCExpr *Subsection) const {
+
+  // standard sections don't require the '.section'
   if (ShouldOmitSectionDirective(SectionName, MAI)) {
     OS << '\t' << getSectionName() << '\n';
     return;
   }
 
   OS << "\t.section\t" << getSectionName() << ",\"";
-  if (getKind().isText())
+  if (getCharacteristics() & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)
+    OS << 'd';
+  if (getCharacteristics() & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)
+    OS << 'b';
+  if (getCharacteristics() & COFF::IMAGE_SCN_MEM_EXECUTE)
     OS << 'x';
-  if (getKind().isWriteable())
+  if (getCharacteristics() & COFF::IMAGE_SCN_MEM_WRITE)
     OS << 'w';
-  else
+  else if (getCharacteristics() & COFF::IMAGE_SCN_MEM_READ)
     OS << 'r';
-  if (getCharacteristics() & MCSectionCOFF::IMAGE_SCN_MEM_DISCARDABLE)
+  else
+    OS << 'y';
+  if (getCharacteristics() & COFF::IMAGE_SCN_LNK_REMOVE)
     OS << 'n';
-  OS << "\"\n";
+  if (getCharacteristics() & COFF::IMAGE_SCN_MEM_SHARED)
+    OS << 's';
+  OS << '"';
+
+  if (getCharacteristics() & COFF::IMAGE_SCN_LNK_COMDAT) {
+    OS << ",";
+    switch (Selection) {
+      case COFF::IMAGE_COMDAT_SELECT_NODUPLICATES:
+        OS << "one_only,";
+        break;
+      case COFF::IMAGE_COMDAT_SELECT_ANY:
+        OS << "discard,";
+        break;
+      case COFF::IMAGE_COMDAT_SELECT_SAME_SIZE:
+        OS << "same_size,";
+        break;
+      case COFF::IMAGE_COMDAT_SELECT_EXACT_MATCH:
+        OS << "same_contents,";
+        break;
+      case COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE:
+        OS << "associative,";
+        break;
+      case COFF::IMAGE_COMDAT_SELECT_LARGEST:
+        OS << "largest,";
+        break;
+      case COFF::IMAGE_COMDAT_SELECT_NEWEST:
+        OS << "newest,";
+        break;
+      default:
+        assert (0 && "unsupported COFF selection type");
+        break;
+    }
+    assert(COMDATSymbol);
+    COMDATSymbol->print(OS, &MAI);
+  }
+  OS << '\n';
+}
+
+bool MCSectionCOFF::UseCodeAlign() const {
+  return getKind().isText();
+}
+
+bool MCSectionCOFF::isVirtualSection() const {
+  return getCharacteristics() & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA;
 }