1 ; RUN: opt < %s -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -dce -instcombine -S -simplifycfg | FileCheck %s
3 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
4 target triple = "x86_64-apple-macosx10.8.0"
7 ; We want to make sure that we are vectorizeing the scalar loop only once
8 ; even if the pass manager runs the vectorizer multiple times due to inlining.
11 ; This test checks that we add metadata to vectorized loops
12 ; CHECK-LABEL: @_Z4foo1Pii(
17 ; This test comes from the loop:
19 ;int foo (int *A, int n) {
20 ; return std::accumulate(A, A + n, 0);
22 define i32 @_Z4foo1Pii(i32* %A, i32 %n) #0 {
24 %idx.ext = sext i32 %n to i64
25 %add.ptr = getelementptr inbounds i32* %A, i64 %idx.ext
26 %cmp3.i = icmp eq i32 %n, 0
27 br i1 %cmp3.i, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %for.body.i
29 for.body.i: ; preds = %entry, %for.body.i
30 %__init.addr.05.i = phi i32 [ %add.i, %for.body.i ], [ 0, %entry ]
31 %__first.addr.04.i = phi i32* [ %incdec.ptr.i, %for.body.i ], [ %A, %entry ]
32 %0 = load i32* %__first.addr.04.i, align 4
33 %add.i = add nsw i32 %0, %__init.addr.05.i
34 %incdec.ptr.i = getelementptr inbounds i32* %__first.addr.04.i, i64 1
35 %cmp.i = icmp eq i32* %incdec.ptr.i, %add.ptr
36 br i1 %cmp.i, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %for.body.i
38 _ZSt10accumulateIPiiET0_T_S2_S1_.exit: ; preds = %for.body.i, %entry
39 %__init.addr.0.lcssa.i = phi i32 [ 0, %entry ], [ %add.i, %for.body.i ]
40 ret i32 %__init.addr.0.lcssa.i
43 ; This test checks that we don't vectorize loops that are marked with the "width" == 1 metadata.
44 ; CHECK-LABEL: @_Z4foo2Pii(
45 ; CHECK-NOT: <4 x i32>
48 define i32 @_Z4foo2Pii(i32* %A, i32 %n) #0 {
50 %idx.ext = sext i32 %n to i64
51 %add.ptr = getelementptr inbounds i32* %A, i64 %idx.ext
52 %cmp3.i = icmp eq i32 %n, 0
53 br i1 %cmp3.i, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %for.body.i
55 for.body.i: ; preds = %entry, %for.body.i
56 %__init.addr.05.i = phi i32 [ %add.i, %for.body.i ], [ 0, %entry ]
57 %__first.addr.04.i = phi i32* [ %incdec.ptr.i, %for.body.i ], [ %A, %entry ]
58 %0 = load i32* %__first.addr.04.i, align 4
59 %add.i = add nsw i32 %0, %__init.addr.05.i
60 %incdec.ptr.i = getelementptr inbounds i32* %__first.addr.04.i, i64 1
61 %cmp.i = icmp eq i32* %incdec.ptr.i, %add.ptr
62 br i1 %cmp.i, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %for.body.i, !llvm.loop !0
64 _ZSt10accumulateIPiiET0_T_S2_S1_.exit: ; preds = %for.body.i, %entry
65 %__init.addr.0.lcssa.i = phi i32 [ 0, %entry ], [ %add.i, %for.body.i ]
66 ret i32 %__init.addr.0.lcssa.i
69 attributes #0 = { nounwind readonly ssp uwtable "fp-contract-model"="standard" "no-frame-pointer-elim" "no-frame-pointer-elim-non-leaf" "realign-stack" "relocation-model"="pic" "ssp-buffers-size"="8" }
71 ; CHECK: !0 = metadata !{metadata !0, metadata !1, metadata !2}
72 ; CHECK: !1 = metadata !{metadata !"llvm.loop.vectorize.width", i32 1}
73 ; CHECK: !2 = metadata !{metadata !"llvm.loop.interleave.count", i32 1}
74 ; CHECK: !3 = metadata !{metadata !3, metadata !1, metadata !2}
76 !0 = metadata !{metadata !0, metadata !1}
77 !1 = metadata !{metadata !"llvm.loop.vectorize.width", i32 1}