1 files changed, 70 insertions, 0 deletions
diff --git a/test/Transforms/LoopVectorize/SystemZ/mem-interleaving-costs.ll b/test/Transforms/LoopVectorize/SystemZ/mem-interleaving-costs.ll
new file mode 100644
index 0000000000000..5c15ee4f2d9f1
--- /dev/null
+++ b/test/Transforms/LoopVectorize/SystemZ/mem-interleaving-costs.ll
@@ -0,0 +1,70 @@
+; REQUIRES: asserts
+; RUN: opt -mtriple=s390x-unknown-linux -mcpu=z13 -loop-vectorize \
+; RUN:   -force-vector-width=4 -debug-only=loop-vectorize \
+; RUN:   -disable-output < %s 2>&1 | FileCheck %s
+;
+; Check that the loop vectorizer performs memory interleaving with accurate
+; cost estimations.
+
+
+; Simple case where just the load is interleaved, because the store group
+; would have gaps.
+define void @fun0(i32* %data, i64 %n) {
+entry:
+  br label %for.body
+
+for.body:
+  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
+  %tmp0 = getelementptr inbounds i32, i32* %data, i64 %i
+  %tmp1 = load i32, i32* %tmp0, align 4
+  %tmp2 = add i32 %tmp1, 1
+  store i32 %tmp2, i32* %tmp0, align 4
+  %i.next = add nuw nsw i64 %i, 2
+  %cond = icmp slt i64 %i.next, %n
+  br i1 %cond, label %for.body, label %for.end
+
+for.end:
+  ret void
+
+; CHECK: LV: Creating an interleave group with:  %tmp1 = load i32, i32* %tmp0, align 4
+; CHECK: LV: Found an estimated cost of 3 for VF 4 For instruction:   %tmp1 = load i32, i32* %tmp0, align 4
+;        (vl; vl; vperm)
+}
+
+; Interleaving of both load and stores.
+define void @fun1(i32* %data, i64 %n) {
+entry:
+  br label %for.body
+
+for.body:
+  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
+  %tmp0 = getelementptr inbounds i32, i32* %data, i64 %i
+  %tmp1 = load i32, i32* %tmp0, align 4
+  %i_1  = add i64 %i, 1
+  %tmp2 = getelementptr inbounds i32, i32* %data, i64 %i_1
+  %tmp3 = load i32, i32* %tmp2, align 4
+  store i32 %tmp1, i32* %tmp2, align 4
+  store i32 %tmp3, i32* %tmp0, align 4
+  %i.next = add nuw nsw i64 %i, 2
+  %cond = icmp slt i64 %i.next, %n
+  br i1 %cond, label %for.body, label %for.end
+
+for.end:
+  ret void
+
+; CHECK: LV: Creating an interleave group with:  store i32 %tmp3, i32* %tmp0, align 4
+; CHECK: LV: Inserted:  store i32 %tmp1, i32* %tmp2, align 4
+; CHECK:     into the interleave group with  store i32 %tmp3, i32* %tmp0, align 4
+; CHECK: LV: Creating an interleave group with:  %tmp3 = load i32, i32* %tmp2, align 4
+; CHECK: LV: Inserted:  %tmp1 = load i32, i32* %tmp0, align 4
+; CHECK:     into the interleave group with  %tmp3 = load i32, i32* %tmp2, align 4
+
+; CHECK: LV: Found an estimated cost of 4 for VF 4 For instruction:   %tmp1 = load i32, i32* %tmp0, align 4
+; CHECK: LV: Found an estimated cost of 0 for VF 4 For instruction:   %tmp3 = load i32, i32* %tmp2, align 4
+;            (vl; vl; vperm, vpkg)
+
+; CHECK: LV: Found an estimated cost of 0 for VF 4 For instruction:   store i32 %tmp1, i32* %tmp2, align 4
+; CHECK: LV: Found an estimated cost of 4 for VF 4 For instruction:   store i32 %tmp3, i32* %tmp0, align 4
+;            (vmrlf; vmrhf; vst; vst)
+}
+