1 files changed, 111 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/int-const-04.ll b/test/CodeGen/SystemZ/int-const-04.ll
new file mode 100644
index 0000000000000..41c7306c89aa2
--- /dev/null
+++ b/test/CodeGen/SystemZ/int-const-04.ll
@@ -0,0 +1,111 @@
+; Test moves of integers to 2-byte memory locations.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check the low end of the unsigned range.
+define void @f1(i16 *%ptr) {
+; CHECK: f1:
+; CHECK: mvhhi 0(%r2), 0
+; CHECK: br %r14
+  store i16 0, i16 *%ptr
+  ret void
+}
+
+; Check the high end of the signed range.
+define void @f2(i16 *%ptr) {
+; CHECK: f2:
+; CHECK: mvhhi 0(%r2), 32767
+; CHECK: br %r14
+  store i16 32767, i16 *%ptr
+  ret void
+}
+
+; Check the next value up.
+define void @f3(i16 *%ptr) {
+; CHECK: f3:
+; CHECK: mvhhi 0(%r2), -32768
+; CHECK: br %r14
+  store i16 -32768, i16 *%ptr
+  ret void
+}
+
+; Check the high end of the unsigned range.
+define void @f4(i16 *%ptr) {
+; CHECK: f4:
+; CHECK: mvhhi 0(%r2), -1
+; CHECK: br %r14
+  store i16 65535, i16 *%ptr
+  ret void
+}
+
+; Check -1.
+define void @f5(i16 *%ptr) {
+; CHECK: f5:
+; CHECK: mvhhi 0(%r2), -1
+; CHECK: br %r14
+  store i16 -1, i16 *%ptr
+  ret void
+}
+
+; Check the low end of the signed range.
+define void @f6(i16 *%ptr) {
+; CHECK: f6:
+; CHECK: mvhhi 0(%r2), -32768
+; CHECK: br %r14
+  store i16 -32768, i16 *%ptr
+  ret void
+}
+
+; Check the next value down.
+define void @f7(i16 *%ptr) {
+; CHECK: f7:
+; CHECK: mvhhi 0(%r2), 32767
+; CHECK: br %r14
+  store i16 -32769, i16 *%ptr
+  ret void
+}
+
+; Check the high end of the MVHHI range.
+define void @f8(i16 *%a) {
+; CHECK: f8:
+; CHECK: mvhhi 4094(%r2), 42
+; CHECK: br %r14
+  %ptr = getelementptr i16 *%a, i64 2047
+  store i16 42, i16 *%ptr
+  ret void
+}
+
+; Check the next halfword up, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define void @f9(i16 *%a) {
+; CHECK: f9:
+; CHECK: aghi %r2, 4096
+; CHECK: mvhhi 0(%r2), 42
+; CHECK: br %r14
+  %ptr = getelementptr i16 *%a, i64 2048
+  store i16 42, i16 *%ptr
+  ret void
+}
+
+; Check negative displacements, which also need separate address logic.
+define void @f10(i16 *%a) {
+; CHECK: f10:
+; CHECK: aghi %r2, -2
+; CHECK: mvhhi 0(%r2), 42
+; CHECK: br %r14
+  %ptr = getelementptr i16 *%a, i64 -1
+  store i16 42, i16 *%ptr
+  ret void
+}
+
+; Check that MVHHI does not allow an index
+define void @f11(i64 %src, i64 %index) {
+; CHECK: f11:
+; CHECK: agr %r2, %r3
+; CHECK: mvhhi 0(%r2), 42
+; CHECK: br %r14
+  %add = add i64 %src, %index
+  %ptr = inttoptr i64 %add to i16 *
+  store i16 42, i16 *%ptr
+  ret void
+}