1 files changed, 21 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/memchr-01.ll b/test/CodeGen/SystemZ/memchr-01.ll
new file mode 100644
index 0000000..c51690b
--- /dev/null
+++ b/test/CodeGen/SystemZ/memchr-01.ll
@@ -0,0 +1,21 @@
+; Test memchr using SRST, with a weird but usable prototype.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+declare i8 *@memchr(i8 *%src, i16 %char, i32 %len)
+
+; Test a simple forwarded call.
+define i8 *@f1(i8 *%src, i16 %char, i32 %len) {
+; CHECK-LABEL: f1:
+; CHECK-DAG: lgr [[REG:%r[1-5]]], %r2
+; CHECK-DAG: algfr %r2, %r4
+; CHECK-DAG: llcr %r0, %r3
+; CHECK: [[LABEL:\.[^:]*]]:
+; CHECK: srst %r2, [[REG]]
+; CHECK-NEXT: jo [[LABEL]]
+; CHECK: jl {{\.L.*}}
+; CHECK: lghi %r2, 0
+; CHECK: br %r14
+  %res = call i8 *@memchr(i8 *%src, i16 %char, i32 %len)
+  ret i8 *%res
+}