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diff --git a/test/CodeGen/SystemZ/bswap-01.ll b/test/CodeGen/SystemZ/bswap-01.ll
new file mode 100644
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+++ b/test/CodeGen/SystemZ/bswap-01.ll
@@ -0,0 +1,24 @@
+; Test byteswaps between registers.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+declare i32 @llvm.bswap.i32(i32 %a)
+declare i64 @llvm.bswap.i64(i64 %a)
+
+; Check 32-bit register-to-register byteswaps.
+define i32 @f1(i32 %a) {
+; CHECK: f1:
+; CHECK: lrvr [[REGISTER:%r[0-5]]], %r2
+; CHECk: br %r14
+  %swapped = call i32 @llvm.bswap.i32(i32 %a)
+  ret i32 %swapped
+}
+
+; Check 64-bit register-to-register byteswaps.
+define i64 @f2(i64 %a) {
+; CHECK: f2:
+; CHECK: lrvgr %r2, %r2
+; CHECk: br %r14
+  %swapped = call i64 @llvm.bswap.i64(i64 %a)
+  ret i64 %swapped
+}