diff --git a/llvm/lib/CodeGen/Analysis.cpp b/llvm/lib/CodeGen/Analysis.cpp
index 6c05966..4f24f07 100644
--- a/llvm/lib/CodeGen/Analysis.cpp
+++ b/llvm/lib/CodeGen/Analysis.cpp
@@ -309,7 +309,8 @@
         NoopInput = Op;
     } else if (isa<TruncInst>(I) &&
                TLI.allowTruncateForTailCall(Op->getType(), I->getType())) {
-      DataBits = std::min(DataBits, I->getType()->getPrimitiveSizeInBits());
+      DataBits = std::min((uint64_t)DataBits,
+                         I->getType()->getPrimitiveSizeInBits().getFixedSize());
       NoopInput = Op;
     } else if (auto CS = ImmutableCallSite(I)) {
       const Value *ReturnedOp = CS.getReturnedArgOperand();