1 ; RUN: opt < %s -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -dce -instcombine -S | 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"
6 @a = common global [2048 x i32] zeroinitializer, align 16
13 ;CHECK: load <4 x i32>
14 ;CHECK: add nsw <4 x i32>
15 ;CHECK: store <4 x i32>
17 define void @inc(i32 %n) nounwind uwtable noinline ssp {
18 %1 = icmp sgt i32 %n, 0
19 br i1 %1, label %.lr.ph, label %._crit_edge
21 .lr.ph: ; preds = %0, %.lr.ph
22 %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
23 %2 = getelementptr inbounds [2048 x i32]* @a, i64 0, i64 %indvars.iv
24 %3 = load i32* %2, align 4
25 %4 = trunc i64 %indvars.iv to i32
26 %5 = add nsw i32 %3, %4
27 store i32 %5, i32* %2, align 4
28 %indvars.iv.next = add i64 %indvars.iv, 1
29 %lftr.wideiv = trunc i64 %indvars.iv.next to i32
30 %exitcond = icmp eq i32 %lftr.wideiv, %n
31 br i1 %exitcond, label %._crit_edge, label %.lr.ph
33 ._crit_edge: ; preds = %.lr.ph, %0
37 ; Can't vectorize this loop because the access to A[X] is non linear.
39 ; for (i = 0; i < n; ++i) {
45 define i32 @histogram(i32* nocapture noalias %A, i32* nocapture noalias %B, i32 %n) nounwind uwtable ssp {
47 %cmp6 = icmp sgt i32 %n, 0
48 br i1 %cmp6, label %for.body, label %for.end
50 for.body: ; preds = %entry, %for.body
51 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
52 %arrayidx = getelementptr inbounds i32* %B, i64 %indvars.iv
53 %0 = load i32* %arrayidx, align 4
54 %idxprom1 = sext i32 %0 to i64
55 %arrayidx2 = getelementptr inbounds i32* %A, i64 %idxprom1
56 %1 = load i32* %arrayidx2, align 4
57 %inc = add nsw i32 %1, 1
58 store i32 %inc, i32* %arrayidx2, align 4
59 %indvars.iv.next = add i64 %indvars.iv, 1
60 %lftr.wideiv = trunc i64 %indvars.iv.next to i32
61 %exitcond = icmp eq i32 %lftr.wideiv, %n
62 br i1 %exitcond, label %for.end, label %for.body
64 for.end: ; preds = %for.body, %entry