MC: Direct all {fragment,section,symbol} address access through the MCAsmLayout object.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99380 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCExpr.cpp b/lib/MC/MCExpr.cpp
index a9256b6..1d6a316 100644
--- a/lib/MC/MCExpr.cpp
+++ b/lib/MC/MCExpr.cpp
@@ -268,8 +268,8 @@
           Layout->getAssembler().getSymbolData(Res.getSymA()->getSymbol());
         MCSymbolData &B =
           Layout->getAssembler().getSymbolData(Res.getSymB()->getSymbol());
-        Res = MCValue::get(+ A.getFragment()->getAddress() + A.getOffset()
-                           - B.getFragment()->getAddress() - B.getOffset()
+        Res = MCValue::get(+ Layout->getSymbolAddress(&A) + A.getOffset()
+                           - Layout->getSymbolAddress(&B) - B.getOffset()
                            + Res.getConstant());
       }