Standardize accesses to the TargetInfo in IR-gen.

Patch by Stephen Lin!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179638 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExprAgg.cpp b/lib/CodeGen/CGExprAgg.cpp
index 1ac13c0..6b29b31 100644
--- a/lib/CodeGen/CGExprAgg.cpp
+++ b/lib/CodeGen/CGExprAgg.cpp
@@ -1341,7 +1341,7 @@
         // Reference values are always non-null and have the width of a pointer.
         if (Field->getType()->isReferenceType())
           NumNonZeroBytes += CGF.getContext().toCharUnitsFromBits(
-              CGF.getContext().getTargetInfo().getPointerWidth(0));
+              CGF.getTarget().getPointerWidth(0));
         else
           NumNonZeroBytes += GetNumNonZeroBytesInInit(E, CGF);
       }