[Hexagon] Use loop data prefetch on Hexagon
llvm-svn: 276422
diff --git a/llvm/test/CodeGen/Hexagon/loop-prefetch.ll b/llvm/test/CodeGen/Hexagon/loop-prefetch.ll
new file mode 100644
index 0000000..0c6e458
--- /dev/null
+++ b/llvm/test/CodeGen/Hexagon/loop-prefetch.ll
@@ -0,0 +1,27 @@
+; RUN: llc -march=hexagon -hexagon-loop-prefetch < %s | FileCheck %s
+; CHECK: dcfetch
+
+target triple = "hexagon"
+
+define void @copy(i32* nocapture %d, i32* nocapture readonly %s, i32 %n) local_unnamed_addr #0 {
+entry:
+ %tobool2 = icmp eq i32 %n, 0
+ br i1 %tobool2, label %while.end, label %while.body
+
+while.body: ; preds = %entry, %while.body
+ %n.addr.05 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
+ %s.addr.04 = phi i32* [ %incdec.ptr, %while.body ], [ %s, %entry ]
+ %d.addr.03 = phi i32* [ %incdec.ptr1, %while.body ], [ %d, %entry ]
+ %dec = add i32 %n.addr.05, -1
+ %incdec.ptr = getelementptr inbounds i32, i32* %s.addr.04, i32 1
+ %0 = load i32, i32* %s.addr.04, align 4
+ %incdec.ptr1 = getelementptr inbounds i32, i32* %d.addr.03, i32 1
+ store i32 %0, i32* %d.addr.03, align 4
+ %tobool = icmp eq i32 %dec, 0
+ br i1 %tobool, label %while.end, label %while.body
+
+while.end: ; preds = %while.body, %entry
+ ret void
+}
+
+attributes #0 = { norecurse nounwind "target-cpu"="hexagonv60" "target-features"="-hvx,-hvx-double" }