MC/Mach-O: Find section ordinal's by looking at the symbol, instead of assuming they are present in a fragment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130519 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MachObjectWriter.cpp b/lib/MC/MachObjectWriter.cpp
index afa3b5c..dde1c5d 100644
--- a/lib/MC/MachObjectWriter.cpp
+++ b/lib/MC/MachObjectWriter.cpp
@@ -1050,8 +1050,10 @@
           FixedValue -= Layout.getSymbolOffset(SD);
       } else {
         // The index is the section ordinal (1-based).
-        Index = SD->getFragment()->getParent()->getOrdinal() + 1;
-        FixedValue += getSectionAddress(SD->getFragment()->getParent());
+        const MCSectionData &SymSD = Asm.getSectionData(
+          SD->getSymbol().getSection());
+        Index = SymSD.getOrdinal() + 1;
+        FixedValue += getSectionAddress(&SymSD);
       }
       if (IsPCRel)
         FixedValue -= getSectionAddress(Fragment->getParent());
@@ -1149,8 +1151,10 @@
           FixedValue -= Layout.getSymbolOffset(SD);
       } else {
         // The index is the section ordinal (1-based).
-        Index = SD->getFragment()->getParent()->getOrdinal() + 1;
-        FixedValue += getSectionAddress(SD->getFragment()->getParent());
+        const MCSectionData &SymSD = Asm.getSectionData(
+          SD->getSymbol().getSection());
+        Index = SymSD.getOrdinal() + 1;
+        FixedValue += getSectionAddress(&SymSD);
       }
       if (IsPCRel)
         FixedValue -= getSectionAddress(Fragment->getParent());