1 files changed, 67 insertions, 0 deletions
diff --git a/test/CodeGen/AArch64/falkor-hwpf-fix.ll b/test/CodeGen/AArch64/falkor-hwpf-fix.ll
new file mode 100644
index 0000000000000..9f2af5adce71a
--- /dev/null
+++ b/test/CodeGen/AArch64/falkor-hwpf-fix.ll
@@ -0,0 +1,67 @@
+; RUN: llc < %s -mtriple aarch64 -mcpu=falkor -disable-post-ra | FileCheck %s
+
+; Check that strided load tag collisions are avoided on Falkor.
+
+; CHECK-LABEL: hwpf1:
+; CHECK: ldp {{w[0-9]+}}, {{w[0-9]+}}, [x[[BASE:[0-9]+]], #-16]
+; CHECK: mov x[[BASE2:[0-9]+]], x[[BASE]]
+; CHECK: ldp {{w[0-9]+}}, {{w[0-9]+}}, [x[[BASE2]], #-8]
+; CHECK: ldp {{w[0-9]+}}, {{w[0-9]+}}, [x[[BASE3:[0-9]+]]]
+; CHECK: mov x[[BASE4:[0-9]+]], x[[BASE3]]
+; CHECK: ldp {{w[0-9]+}}, {{w[0-9]+}}, [x[[BASE4]], #8]
+
+define void @hwpf1(i32* %p, i32* %sp, i32* %sp2, i32* %sp3, i32* %sp4) {
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry ], [ %inc, %loop ]
+
+  %gep = getelementptr inbounds i32, i32* %p, i32 %iv
+  %load1 = load i32, i32* %gep
+
+  %gep2 = getelementptr inbounds i32, i32* %gep, i32 1
+  %load2 = load i32, i32* %gep2
+
+  %add = add i32 %load1, %load2
+  %storegep = getelementptr inbounds i32, i32* %sp, i32 %iv
+  store i32 %add, i32* %storegep
+
+  %gep3 = getelementptr inbounds i32, i32* %gep, i32 2
+  %load3 = load i32, i32* %gep3
+
+  %gep4 = getelementptr inbounds i32, i32* %gep, i32 3
+  %load4 = load i32, i32* %gep4
+
+  %add2 = add i32 %load3, %load4
+  %storegep2 = getelementptr inbounds i32, i32* %sp2, i32 %iv
+  store i32 %add2, i32* %storegep2
+
+  %gep5 = getelementptr inbounds i32, i32* %gep, i32 4
+  %load5 = load i32, i32* %gep5
+
+  %gep6 = getelementptr inbounds i32, i32* %gep, i32 5
+  %load6 = load i32, i32* %gep6
+
+  %add3 = add i32 %load5, %load6
+  %storegep3 = getelementptr inbounds i32, i32* %sp3, i32 %iv
+  store i32 %add3, i32* %storegep3
+
+  %gep7 = getelementptr inbounds i32, i32* %gep, i32 6
+  %load7 = load i32, i32* %gep7
+
+  %gep8 = getelementptr inbounds i32, i32* %gep, i32 7
+  %load8 = load i32, i32* %gep8
+
+  %add4 = add i32 %load7, %load8
+  %storegep4 = getelementptr inbounds i32, i32* %sp4, i32 %iv
+  store i32 %add4, i32* %storegep4
+
+  %inc = add i32 %iv, 8
+  %exitcnd = icmp uge i32 %inc, 1024
+  br i1 %exitcnd, label %exit, label %loop
+
+exit:
+  ret void
+}
+