MC: Implement COFF .linkonce directive
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185753 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCSectionCOFF.cpp b/lib/MC/MCSectionCOFF.cpp
index 6cedf06..64aa2c5 100644
--- a/lib/MC/MCSectionCOFF.cpp
+++ b/lib/MC/MCSectionCOFF.cpp
@@ -28,6 +28,17 @@
return false;
}
+void MCSectionCOFF::setSelection(int Selection,
+ const MCSectionCOFF *Assoc) const {
+ assert(Selection != 0 && "invalid COMDAT selection type");
+ assert((Selection == COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE) ==
+ (Assoc != 0) &&
+ "associative COMDAT section must have an associated section");
+ this->Selection = Selection;
+ this->Assoc = Assoc;
+ Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
+}
+
void MCSectionCOFF::PrintSwitchToSection(const MCAsmInfo &MAI,
raw_ostream &OS,
const MCExpr *Subsection) const {
@@ -63,12 +74,15 @@
case COFF::IMAGE_COMDAT_SELECT_EXACT_MATCH:
OS << "\t.linkonce same_contents\n";
break;
- //NOTE: as of binutils 2.20, there is no way to specifiy select largest
- // with the .linkonce directive. For now, we treat it as an invalid
- // comdat selection value.
+ case COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE:
+ OS << "\t.linkonce associative " << Assoc->getSectionName() << "\n";
+ break;
case COFF::IMAGE_COMDAT_SELECT_LARGEST:
- // OS << "\t.linkonce largest\n";
- // break;
+ OS << "\t.linkonce largest\n";
+ break;
+ case COFF::IMAGE_COMDAT_SELECT_NEWEST:
+ OS << "\t.linkonce newest\n";
+ break;
default:
assert (0 && "unsupported COFF selection type");
break;