1 files changed, 69 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/atomicrmw-sub-05.ll b/test/CodeGen/SystemZ/atomicrmw-sub-05.ll
new file mode 100644
index 0000000..7668f0e
--- /dev/null
+++ b/test/CodeGen/SystemZ/atomicrmw-sub-05.ll
@@ -0,0 +1,69 @@
+; Test 32-bit atomic subtractions, z196 version.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
+
+; Check addition of a variable.
+define i32 @f1(i32 %dummy, i32 *%src, i32 %b) {
+; CHECK-LABEL: f1:
+; CHECK: lcr [[NEG:%r[0-5]]], %r4
+; CHECK: laa %r2, [[NEG]], 0(%r3)
+; CHECK: br %r14
+  %res = atomicrmw sub i32 *%src, i32 %b seq_cst
+  ret i32 %res
+}
+
+; Check addition of 1, which needs a temporary.
+define i32 @f2(i32 %dummy, i32 *%src) {
+; CHECK-LABEL: f2:
+; CHECK: lhi [[TMP:%r[0-5]]], -1
+; CHECK: laa %r2, [[TMP]], 0(%r3)
+; CHECK: br %r14
+  %res = atomicrmw sub i32 *%src, i32 1 seq_cst
+  ret i32 %res
+}
+
+; Check the high end of the LAA range.
+define i32 @f3(i32 %dummy, i32 *%src, i32 %b) {
+; CHECK-LABEL: f3:
+; CHECK: lcr [[NEG:%r[0-5]]], %r4
+; CHECK: laa %r2, [[NEG]], 524284(%r3)
+; CHECK: br %r14
+  %ptr = getelementptr i32 *%src, i32 131071
+  %res = atomicrmw sub i32 *%ptr, i32 %b seq_cst
+  ret i32 %res
+}
+
+; Check the next word up, which needs separate address logic.
+define i32 @f4(i32 %dummy, i32 *%src, i32 %b) {
+; CHECK-LABEL: f4:
+; CHECK-DAG: lcr [[NEG:%r[0-5]]], %r4
+; CHECK-DAG: agfi %r3, 524288
+; CHECK: laa %r2, [[NEG]], 0(%r3)
+; CHECK: br %r14
+  %ptr = getelementptr i32 *%src, i32 131072
+  %res = atomicrmw sub i32 *%ptr, i32 %b seq_cst
+  ret i32 %res
+}
+
+; Check the low end of the LAA range.
+define i32 @f5(i32 %dummy, i32 *%src, i32 %b) {
+; CHECK-LABEL: f5:
+; CHECK: lcr [[NEG:%r[0-5]]], %r4
+; CHECK: laa %r2, [[NEG]], -524288(%r3)
+; CHECK: br %r14
+  %ptr = getelementptr i32 *%src, i32 -131072
+  %res = atomicrmw sub i32 *%ptr, i32 %b seq_cst
+  ret i32 %res
+}
+
+; Check the next word down, which needs separate address logic.
+define i32 @f6(i32 %dummy, i32 *%src, i32 %b) {
+; CHECK-LABEL: f6:
+; CHECK-DAG: lcr [[NEG:%r[0-5]]], %r4
+; CHECK-DAG: agfi %r3, -524292
+; CHECK: laa %r2, [[NEG]], 0(%r3)
+; CHECK: br %r14
+  %ptr = getelementptr i32 *%src, i32 -131073
+  %res = atomicrmw sub i32 *%ptr, i32 %b seq_cst
+  ret i32 %res
+}