diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -3268,6 +3268,9 @@
       ExtraBitsSize = alignTo(ExtraBitsSize, 8);
       ExtraBits = Realigned.getRawData()[0] &
         (((uint64_t)-1) >> (64 - ExtraBitsSize));
+
+      if (BitWidth < 64)
+        Realigned = Realigned.zext(ExtraBitsSize);
       Realigned.lshrInPlace(ExtraBitsSize);
     } else
       ExtraBits = Realigned.getRawData()[BitWidth / 64];
diff --git a/llvm/test/CodeGen/AArch64/aarch64_be-global-const.ll b/llvm/test/CodeGen/AArch64/aarch64_be-global-const.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/aarch64_be-global-const.ll
@@ -0,0 +1,6 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=aarch64_be < %s | FileCheck %s
+
+@G = global <4 x i1> <i1 true, i1 false, i1 true, i1 true>
+;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
+; CHECK: {{.*}}