1 ; RUN: opt < %s -hexagon-vlcr -adce -S | FileCheck %s
3 ; CHECK: %.hexagon.vlcr = tail call <32 x i32> @llvm.hexagon.V6.vmaxub.128B
4 ; ModuleID = 'hexagon_vector_loop_carried_reuse.c'
5 source_filename = "hexagon_vector_loop_carried_reuse.c"
6 target datalayout = "e-m:e-p:32:32:32-a:0-n16:32-i64:64:64-i32:32:32-i16:16:16-i1:8:8-f32:32:32-f64:64:64-v32:32:32-v64:64:64-v512:512:512-v1024:1024:1024-v2048:2048:2048"
7 target triple = "hexagon"
9 @W = external local_unnamed_addr global i32, align 4
11 ; Function Attrs: nounwind
12 define void @foo(i8* noalias nocapture readonly %src, i8* noalias nocapture %dst, i32 %stride) local_unnamed_addr #0 {
14 %add.ptr = getelementptr inbounds i8, i8* %src, i32 %stride
15 %mul = mul nsw i32 %stride, 2
16 %add.ptr1 = getelementptr inbounds i8, i8* %src, i32 %mul
17 %0 = load i32, i32* @W, align 4, !tbaa !1
18 %cmp55 = icmp sgt i32 %0, 0
19 br i1 %cmp55, label %for.body.lr.ph, label %for.end
21 for.body.lr.ph: ; preds = %entry
22 %1 = bitcast i8* %add.ptr1 to <32 x i32>*
23 %2 = load <32 x i32>, <32 x i32>* %1, align 128, !tbaa !5
24 %incdec.ptr4 = getelementptr inbounds i8, i8* %add.ptr1, i32 128
25 %3 = bitcast i8* %incdec.ptr4 to <32 x i32>*
26 %4 = bitcast i8* %add.ptr to <32 x i32>*
27 %5 = load <32 x i32>, <32 x i32>* %4, align 128, !tbaa !5
28 %incdec.ptr2 = getelementptr inbounds i8, i8* %add.ptr, i32 128
29 %6 = bitcast i8* %incdec.ptr2 to <32 x i32>*
30 %7 = bitcast i8* %src to <32 x i32>*
31 %8 = load <32 x i32>, <32 x i32>* %7, align 128, !tbaa !5
32 %incdec.ptr = getelementptr inbounds i8, i8* %src, i32 128
33 %9 = bitcast i8* %incdec.ptr to <32 x i32>*
34 %10 = bitcast i8* %dst to <32 x i32>*
37 for.body: ; preds = %for.body.lr.ph, %for.body
38 %out.063 = phi <32 x i32>* [ %10, %for.body.lr.ph ], [ %incdec.ptr18, %for.body ]
39 %p2.062 = phi <32 x i32>* [ %3, %for.body.lr.ph ], [ %incdec.ptr10, %for.body ]
40 %p1.061 = phi <32 x i32>* [ %6, %for.body.lr.ph ], [ %incdec.ptr8, %for.body ]
41 %p0.060 = phi <32 x i32>* [ %9, %for.body.lr.ph ], [ %incdec.ptr6, %for.body ]
42 %i.059 = phi i32 [ 0, %for.body.lr.ph ], [ %add, %for.body ]
43 %a.sroa.0.058 = phi <32 x i32> [ %8, %for.body.lr.ph ], [ %11, %for.body ]
44 %b.sroa.0.057 = phi <32 x i32> [ %5, %for.body.lr.ph ], [ %12, %for.body ]
45 %c.sroa.0.056 = phi <32 x i32> [ %2, %for.body.lr.ph ], [ %13, %for.body ]
46 %incdec.ptr6 = getelementptr inbounds <32 x i32>, <32 x i32>* %p0.060, i32 1
47 %11 = load <32 x i32>, <32 x i32>* %p0.060, align 128, !tbaa !5
48 %incdec.ptr8 = getelementptr inbounds <32 x i32>, <32 x i32>* %p1.061, i32 1
49 %12 = load <32 x i32>, <32 x i32>* %p1.061, align 128, !tbaa !5
50 %incdec.ptr10 = getelementptr inbounds <32 x i32>, <32 x i32>* %p2.062, i32 1
51 %13 = load <32 x i32>, <32 x i32>* %p2.062, align 128, !tbaa !5
52 %14 = tail call <32 x i32> @llvm.hexagon.V6.vmaxub.128B(<32 x i32> %a.sroa.0.058, <32 x i32> %b.sroa.0.057)
53 %15 = tail call <32 x i32> @llvm.hexagon.V6.vmaxub.128B(<32 x i32> %14, <32 x i32> %c.sroa.0.056)
54 %16 = tail call <32 x i32> @llvm.hexagon.V6.vmaxub.128B(<32 x i32> %11, <32 x i32> %12)
55 %17 = tail call <32 x i32> @llvm.hexagon.V6.vmaxub.128B(<32 x i32> %16, <32 x i32> %13)
56 %18 = tail call <32 x i32> @llvm.hexagon.V6.valignbi.128B(<32 x i32> %17, <32 x i32> %15, i32 1)
57 %incdec.ptr18 = getelementptr inbounds <32 x i32>, <32 x i32>* %out.063, i32 1
58 store <32 x i32> %18, <32 x i32>* %out.063, align 128, !tbaa !5
59 %add = add nuw nsw i32 %i.059, 128
60 %cmp = icmp slt i32 %add, %0
61 br i1 %cmp, label %for.body, label %for.end.loopexit
63 for.end.loopexit: ; preds = %for.body
66 for.end: ; preds = %for.end.loopexit, %entry
70 ; Function Attrs: nounwind readnone
71 declare <32 x i32> @llvm.hexagon.V6.vmaxub.128B(<32 x i32>, <32 x i32>) #1
73 ; Function Attrs: nounwind readnone
74 declare <32 x i32> @llvm.hexagon.V6.valignbi.128B(<32 x i32>, <32 x i32>, i32) #1
76 attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="hexagonv60" "target-features"="+hvx,+hvx-length128b,-long-calls" "unsafe-fp-math"="false" "use-soft-float"="false" }
77 attributes #1 = { nounwind readnone }
81 !0 = !{!"QuIC LLVM Hexagon Clang version hexagon-clang-82-2622 (based on LLVM 5.0.0)"}
83 !2 = !{!"int", !3, i64 0}
84 !3 = !{!"omnipotent char", !4, i64 0}
85 !4 = !{!"Simple C/C++ TBAA"}