MC: Change variable symbols to be recognized as defined, by assigning their sections based on FindAssociatedSection().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130523 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCSymbol.cpp b/lib/MC/MCSymbol.cpp
index 1c71f26..c2fad167 100644
--- a/lib/MC/MCSymbol.cpp
+++ b/lib/MC/MCSymbol.cpp
@@ -58,9 +58,13 @@
          "Invalid redefinition!");
   this->Value = Value;
 
-  // Mark the variable as absolute as appropriate.
-  if (isa<MCConstantExpr>(Value))
-    setAbsolute();
+  // Variables should always be marked as in the same "section" as the value.
+  const MCSection *Section = Value->FindAssociatedSection();
+  if (Section) {
+    setSection(*Section);
+  } else {
+    setUndefined();
+  }
 }
 
 void MCSymbol::print(raw_ostream &OS) const {