1 files changed, 39 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/strlen-01.ll b/test/CodeGen/SystemZ/strlen-01.ll
new file mode 100644
index 000000000000..16161d4d2c82
--- /dev/null
+++ b/test/CodeGen/SystemZ/strlen-01.ll
@@ -0,0 +1,39 @@
+; Test strlen using SRST, i64 version.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+declare i64 @strlen(i8 *%src)
+declare i64 @strnlen(i8 *%src, i64 %len)
+
+; Test strlen with its proper i64 prototype.  It would also be valid for
+; the uses of %r3 and REG after the LGR to be swapped.
+define i64 @f1(i32 %dummy, i8 *%src) {
+; CHECK-LABEL: f1:
+; CHECK-DAG: lhi %r0, 0
+; CHECK-DAG: lghi %r2, 0
+; CHECK-DAG: lgr [[REG:%r[145]]], %r3
+; CHECK: [[LABEL:\.[^:]*]]:
+; CHECK-NEXT: srst %r2, [[REG]]
+; CHECK-NEXT: jo [[LABEL]]
+; CHECK-NEXT: BB#{{[0-9]+}}
+; CHECK-NEXT: sgr %r2, %r3
+; CHECK: br %r14
+  %res = call i64 @strlen(i8 *%src)
+  ret i64 %res
+}
+
+; Test strnlen with its proper i64 prototype.
+define i64 @f2(i64 %len, i8 *%src) {
+; CHECK-LABEL: f2:
+; CHECK-DAG: agr %r2, %r3
+; CHECK-DAG: lhi %r0, 0
+; CHECK-DAG: lgr [[REG:%r[145]]], %r3
+; CHECK: [[LABEL:\.[^:]*]]:
+; CHECK-NEXT: srst %r2, [[REG]]
+; CHECK-NEXT: jo [[LABEL]]
+; CHECK-NEXT: BB#{{[0-9]+}}
+; CHECK-NEXT: sgr %r2, %r3
+; CHECK: br %r14
+  %res = call i64 @strnlen(i8 *%src, i64 %len)
+  ret i64 %res
+}