1 files changed, 49 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/atomicrmw-xor-03.ll b/test/CodeGen/SystemZ/atomicrmw-xor-03.ll
new file mode 100644
index 0000000000000..23884f888e13b
--- /dev/null
+++ b/test/CodeGen/SystemZ/atomicrmw-xor-03.ll
@@ -0,0 +1,49 @@
+; Test 32-bit atomic XORs.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check XORs of a variable.
+define i32 @f1(i32 %dummy, i32 *%src, i32 %b) {
+; CHECK: f1:
+; CHECK: l %r2, 0(%r3)
+; CHECK: [[LABEL:\.[^ ]*]]:
+; CHECK: lr %r0, %r2
+; CHECK: xr %r0, %r4
+; CHECK: cs %r2, %r0, 0(%r3)
+; CHECK: j{{g?}}lh [[LABEL]]
+; CHECK: br %r14
+  %res = atomicrmw xor i32 *%src, i32 %b seq_cst
+  ret i32 %res
+}
+
+; Check the lowest useful constant.
+define i32 @f2(i32 %dummy, i32 *%src) {
+; CHECK: f2:
+; CHECK: l %r2, 0(%r3)
+; CHECK: [[LABEL:\.[^ ]*]]:
+; CHECK: lr %r0, %r2
+; CHECK: xilf %r0, 1
+; CHECK: cs %r2, %r0, 0(%r3)
+; CHECK: j{{g?}}lh [[LABEL]]
+; CHECK: br %r14
+  %res = atomicrmw xor i32 *%src, i32 1 seq_cst
+  ret i32 %res
+}
+
+; Check an arbitrary constant.
+define i32 @f3(i32 %dummy, i32 *%src) {
+; CHECK: f3:
+; CHECK: xilf %r0, 3000000000
+; CHECK: br %r14
+  %res = atomicrmw xor i32 *%src, i32 3000000000 seq_cst
+  ret i32 %res
+}
+
+; Check bitwise negation.
+define i32 @f4(i32 %dummy, i32 *%src) {
+; CHECK: f4:
+; CHECK: xilf %r0, 4294967295
+; CHECK: br %r14
+  %res = atomicrmw xor i32 *%src, i32 -1 seq_cst
+  ret i32 %res
+}