diff --git a/clang/lib/CodeGen/CGStmt.cpp b/clang/lib/CodeGen/CGStmt.cpp
index 707db04..c058b4b 100644
--- a/clang/lib/CodeGen/CGStmt.cpp
+++ b/clang/lib/CodeGen/CGStmt.cpp
@@ -2073,8 +2073,8 @@
 
       // Update largest vector width for any vector types.
       if (auto *VT = dyn_cast<llvm::VectorType>(ResultRegTypes.back()))
-        LargestVectorWidth = std::max(LargestVectorWidth,
-                                      VT->getPrimitiveSizeInBits());
+        LargestVectorWidth = std::max((uint64_t)LargestVectorWidth,
+                                   VT->getPrimitiveSizeInBits().getFixedSize());
     } else {
       ArgTypes.push_back(Dest.getAddress().getType());
       Args.push_back(Dest.getPointer());
@@ -2098,8 +2098,8 @@
 
       // Update largest vector width for any vector types.
       if (auto *VT = dyn_cast<llvm::VectorType>(Arg->getType()))
-        LargestVectorWidth = std::max(LargestVectorWidth,
-                                      VT->getPrimitiveSizeInBits());
+        LargestVectorWidth = std::max((uint64_t)LargestVectorWidth,
+                                   VT->getPrimitiveSizeInBits().getFixedSize());
       if (Info.allowsRegister())
         InOutConstraints += llvm::utostr(i);
       else
@@ -2185,8 +2185,8 @@
 
     // Update largest vector width for any vector types.
     if (auto *VT = dyn_cast<llvm::VectorType>(Arg->getType()))
-      LargestVectorWidth = std::max(LargestVectorWidth,
-                                    VT->getPrimitiveSizeInBits());
+      LargestVectorWidth = std::max((uint64_t)LargestVectorWidth,
+                                   VT->getPrimitiveSizeInBits().getFixedSize());
 
     ArgTypes.push_back(Arg->getType());
     Args.push_back(Arg);