1 files changed, 160 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/memset-01.ll b/test/CodeGen/SystemZ/memset-01.ll
new file mode 100644
index 0000000000000..f17901cc73ab4
--- /dev/null
+++ b/test/CodeGen/SystemZ/memset-01.ll
@@ -0,0 +1,160 @@
+; Test memset in cases where the set value is variable.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+declare void @llvm.memset.p0i8.i32(i8 *nocapture, i8, i32, i32, i1) nounwind
+declare void @llvm.memset.p0i8.i64(i8 *nocapture, i8, i64, i32, i1) nounwind
+
+; No bytes, i32 version.
+define void @f1(i8 *%dest, i8 %val) {
+; CHECK-LABEL: f1:
+; CHECK-NOT: %r2
+; CHECK-NOT: %r3
+; CHECK: br %r14
+  call void @llvm.memset.p0i8.i32(i8 *%dest, i8 %val, i32 0, i32 1, i1 false)
+  ret void
+}
+
+; No bytes, i64 version.
+define void @f2(i8 *%dest, i8 %val) {
+; CHECK-LABEL: f2:
+; CHECK-NOT: %r2
+; CHECK-NOT: %r3
+; CHECK: br %r14
+  call void @llvm.memset.p0i8.i64(i8 *%dest, i8 %val, i64 0, i32 1, i1 false)
+  ret void
+}
+
+; 1 byte, i32 version.
+define void @f3(i8 *%dest, i8 %val) {
+; CHECK-LABEL: f3:
+; CHECK: stc %r3, 0(%r2)
+; CHECK: br %r14
+  call void @llvm.memset.p0i8.i32(i8 *%dest, i8 %val, i32 1, i32 1, i1 false)
+  ret void
+}
+
+; 1 byte, i64 version.
+define void @f4(i8 *%dest, i8 %val) {
+; CHECK-LABEL: f4:
+; CHECK: stc %r3, 0(%r2)
+; CHECK: br %r14
+  call void @llvm.memset.p0i8.i64(i8 *%dest, i8 %val, i64 1, i32 1, i1 false)
+  ret void
+}
+
+; 2 bytes, i32 version.
+define void @f5(i8 *%dest, i8 %val) {
+; CHECK-LABEL: f5:
+; CHECK-DAG: stc %r3, 0(%r2)
+; CHECK-DAG: stc %r3, 1(%r2)
+; CHECK: br %r14
+  call void @llvm.memset.p0i8.i32(i8 *%dest, i8 %val, i32 2, i32 1, i1 false)
+  ret void
+}
+
+; 2 bytes, i64 version.
+define void @f6(i8 *%dest, i8 %val) {
+; CHECK-LABEL: f6:
+; CHECK-DAG: stc %r3, 0(%r2)
+; CHECK-DAG: stc %r3, 1(%r2)
+; CHECK: br %r14
+  call void @llvm.memset.p0i8.i64(i8 *%dest, i8 %val, i64 2, i32 1, i1 false)
+  ret void
+}
+
+; 3 bytes, i32 version.
+define void @f7(i8 *%dest, i8 %val) {
+; CHECK-LABEL: f7:
+; CHECK: stc %r3, 0(%r2)
+; CHECK: mvc 1(2,%r2), 0(%r2)
+; CHECK: br %r14
+  call void @llvm.memset.p0i8.i32(i8 *%dest, i8 %val, i32 3, i32 1, i1 false)
+  ret void
+}
+
+; 3 bytes, i64 version.
+define void @f8(i8 *%dest, i8 %val) {
+; CHECK-LABEL: f8:
+; CHECK: stc %r3, 0(%r2)
+; CHECK: mvc 1(2,%r2), 0(%r2)
+; CHECK: br %r14
+  call void @llvm.memset.p0i8.i64(i8 *%dest, i8 %val, i64 3, i32 1, i1 false)
+  ret void
+}
+
+; 257 bytes, i32 version.
+define void @f9(i8 *%dest, i8 %val) {
+; CHECK-LABEL: f9:
+; CHECK: stc %r3, 0(%r2)
+; CHECK: mvc 1(256,%r2), 0(%r2)
+; CHECK: br %r14
+  call void @llvm.memset.p0i8.i32(i8 *%dest, i8 %val, i32 257, i32 1, i1 false)
+  ret void
+}
+
+; 257 bytes, i64 version.
+define void @f10(i8 *%dest, i8 %val) {
+; CHECK-LABEL: f10:
+; CHECK: stc %r3, 0(%r2)
+; CHECK: mvc 1(256,%r2), 0(%r2)
+; CHECK: br %r14
+  call void @llvm.memset.p0i8.i64(i8 *%dest, i8 %val, i64 257, i32 1, i1 false)
+  ret void
+}
+
+; 258 bytes, i32 version.  We need two MVCs.
+define void @f11(i8 *%dest, i8 %val) {
+; CHECK-LABEL: f11:
+; CHECK: stc %r3, 0(%r2)
+; CHECK: mvc 1(256,%r2), 0(%r2)
+; CHECK: mvc 257(1,%r2), 256(%r2)
+; CHECK: br %r14
+  call void @llvm.memset.p0i8.i32(i8 *%dest, i8 %val, i32 258, i32 1, i1 false)
+  ret void
+}
+
+; 258 bytes, i64 version.
+define void @f12(i8 *%dest, i8 %val) {
+; CHECK-LABEL: f12:
+; CHECK: stc %r3, 0(%r2)
+; CHECK: mvc 1(256,%r2), 0(%r2)
+; CHECK: mvc 257(1,%r2), 256(%r2)
+; CHECK: br %r14
+  call void @llvm.memset.p0i8.i64(i8 *%dest, i8 %val, i64 258, i32 1, i1 false)
+  ret void
+}
+
+; Test the largest case for which straight-line code is used.
+define void @f13(i8 *%dest, i8 %val) {
+; CHECK-LABEL: f13:
+; CHECK: stc %r3, 0(%r2)
+; CHECK: mvc 1(256,%r2), 0(%r2)
+; CHECK: mvc 257(256,%r2), 256(%r2)
+; CHECK: mvc 513(256,%r2), 512(%r2)
+; CHECK: mvc 769(256,%r2), 768(%r2)
+; CHECK: mvc 1025(256,%r2), 1024(%r2)
+; CHECK: mvc 1281(256,%r2), 1280(%r2)
+; CHECK: br %r14
+  call void @llvm.memset.p0i8.i64(i8 *%dest, i8 %val, i64 1537, i32 1,
+                                  i1 false)
+  ret void
+}
+
+; Test the next size up, which uses a loop.  We leave the other corner
+; cases to memcpy-01.ll.
+define void @f14(i8 *%dest, i8 %val) {
+; CHECK-LABEL: f14:
+; CHECK: stc %r3, 0(%r2)
+; CHECK: lghi [[COUNT:%r[0-5]]], 6
+; CHECK: [[LABEL:\.L[^:]*]]:
+; CHECK: pfd 2, 769(%r2)
+; CHECK: mvc 1(256,%r2), 0(%r2)
+; CHECK: la %r2, 256(%r2)
+; CHECK: brctg [[COUNT]], [[LABEL]]
+; CHECK: mvc 1(1,%r2), 0(%r2)
+; CHECK: br %r14
+  call void @llvm.memset.p0i8.i64(i8 *%dest, i8 %val, i64 1538, i32 1,
+                                  i1 false)
+  ret void
+}