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
@@ -3369,7 +3369,8 @@
       ExtraBitsSize = alignTo(ExtraBitsSize, 8);
       ExtraBits = Realigned.getRawData()[0] &
         (((uint64_t)-1) >> (64 - ExtraBitsSize));
-      Realigned.lshrInPlace(ExtraBitsSize);
+      if (BitWidth >= 64)
+        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 @@
+; RUN: llc -mtriple=aarch64_be < %s | FileCheck %s
+
+; CHECK-LABEL: G:
+; CHECK: .byte 11
+; CHECK: .size G, 1
+@G = global <4 x i1> <i1 true, i1 false, i1 true, i1 true>