diff --git a/llvm/lib/Target/CBackend/CBackend.cpp b/llvm/lib/Target/CBackend/CBackend.cpp
index 96ed5d0..4f0a5a8 100644
--- a/llvm/lib/Target/CBackend/CBackend.cpp
+++ b/llvm/lib/Target/CBackend/CBackend.cpp
@@ -1238,7 +1238,7 @@
       Out << '{';
       if (AT->getNumElements()) {
         Out << ' ';
-        Constant *CZ = Context->getNullValue(AT->getElementType());
+        Constant *CZ = CPV->getContext().getNullValue(AT->getElementType());
         printConstant(CZ, Static);
         for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
           Out << ", ";
@@ -1263,7 +1263,7 @@
       assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
       const VectorType *VT = cast<VectorType>(CPV->getType());
       Out << "{ ";
-      Constant *CZ = Context->getNullValue(VT->getElementType());
+      Constant *CZ = CPV->getContext().getNullValue(VT->getElementType());
       printConstant(CZ, Static);
       for (unsigned i = 1, e = VT->getNumElements(); i != e; ++i) {
         Out << ", ";
@@ -1285,10 +1285,12 @@
       Out << '{';
       if (ST->getNumElements()) {
         Out << ' ';
-        printConstant(Context->getNullValue(ST->getElementType(0)), Static);
+        printConstant(
+                 CPV->getContext().getNullValue(ST->getElementType(0)), Static);
         for (unsigned i = 1, e = ST->getNumElements(); i != e; ++i) {
           Out << ", ";
-          printConstant(Context->getNullValue(ST->getElementType(i)), Static);
+          printConstant(
+            CPV->getContext().getNullValue(ST->getElementType(i)), Static);
         }
       }
       Out << " }";
@@ -3498,7 +3500,7 @@
     if (!ITy->isPowerOf2ByteWidth())
       // We have a bit width that doesn't match an even power-of-2 byte
       // size. Consequently we must & the value with the type's bit mask
-      BitMask = Context->getConstantInt(ITy, ITy->getBitMask());
+      BitMask = I.getContext().getConstantInt(ITy, ITy->getBitMask());
   if (BitMask)
     Out << "((";
   writeOperand(Operand);