MC: Add section layout order indices to MCSectionData.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103715 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCAssembler.cpp b/lib/MC/MCAssembler.cpp
index ac91bad..f41b25f 100644
--- a/lib/MC/MCAssembler.cpp
+++ b/lib/MC/MCAssembler.cpp
@@ -601,6 +601,10 @@
   // Create the layout object.
   MCAsmLayout Layout(*this);
 
+  // Assign layout order indices.
+  for (unsigned i = 0, e = Layout.getSectionOrder().size(); i != e; ++i)
+    Layout.getSectionOrder()[i]->setLayoutOrder(i);
+
   // Insert additional align fragments for concrete sections to explicitly pad
   // the previous section to match their alignment requirements. This is for
   // 'gas' compatibility, it shouldn't strictly be necessary.