1 ; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -dce -instcombine -S -enable-if-conversion | 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-macosx10.9.0"
6 ; This is kernel11 from "LivermoreLoops". We can't vectorize it because we
7 ; access both x[k] and x[k-1].
9 ; void kernel11(double *x, double *y, int n) {
10 ; for ( int k=1 ; k<n ; k++ )
11 ; x[k] = x[k-1] + y[k];
14 ; CHECK-LABEL: @kernel11(
15 ; CHECK-NOT: <4 x double>
17 define i32 @kernel11(double* %x, double* %y, i32 %n) nounwind uwtable ssp {
18 %1 = alloca double*, align 8
19 %2 = alloca double*, align 8
20 %3 = alloca i32, align 4
21 %k = alloca i32, align 4
22 store double* %x, double** %1, align 8
23 store double* %y, double** %2, align 8
24 store i32 %n, i32* %3, align 4
25 store i32 1, i32* %k, align 4
28 ; <label>:4 ; preds = %25, %0
29 %5 = load i32* %k, align 4
30 %6 = load i32* %3, align 4
31 %7 = icmp slt i32 %5, %6
32 br i1 %7, label %8, label %28
34 ; <label>:8 ; preds = %4
35 %9 = load i32* %k, align 4
36 %10 = sub nsw i32 %9, 1
37 %11 = sext i32 %10 to i64
38 %12 = load double** %1, align 8
39 %13 = getelementptr inbounds double* %12, i64 %11
40 %14 = load double* %13, align 8
41 %15 = load i32* %k, align 4
42 %16 = sext i32 %15 to i64
43 %17 = load double** %2, align 8
44 %18 = getelementptr inbounds double* %17, i64 %16
45 %19 = load double* %18, align 8
46 %20 = fadd double %14, %19
47 %21 = load i32* %k, align 4
48 %22 = sext i32 %21 to i64
49 %23 = load double** %1, align 8
50 %24 = getelementptr inbounds double* %23, i64 %22
51 store double %20, double* %24, align 8
54 ; <label>:25 ; preds = %8
55 %26 = load i32* %k, align 4
56 %27 = add nsw i32 %26, 1
57 store i32 %27, i32* %k, align 4
60 ; <label>:28 ; preds = %4
66 ; We don't vectorize this function because A[i*7] is scalarized, and the
67 ; different scalars can in theory wrap around and overwrite other scalar
68 ; elements. At the moment we only allow read/write access to arrays
69 ; that are consecutive.
72 ; for (int i=0; i<256; ++i) {
80 ; CHECK-LABEL: @func2(
81 ; CHECK-NOT: <4 x i32>
83 define i32 @func2(i32* nocapture %a) nounwind uwtable ssp {
86 ; <label>:1 ; preds = %7, %0
87 %indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %7 ]
88 %2 = mul nsw i64 %indvars.iv, 7
89 %3 = getelementptr inbounds i32* %a, i64 %2
90 %4 = load i32* %3, align 4
91 %5 = icmp sgt i32 %4, 3
92 br i1 %5, label %6, label %7
94 ; <label>:6 ; preds = %1
96 %tmp1 = mul i32 %tmp, %4
99 ; <label>:7 ; preds = %6, %1
100 %x.0 = phi i32 [ %tmp1, %6 ], [ %4, %1 ]
101 %8 = add nsw i32 %x.0, 3
102 store i32 %8, i32* %3, align 4
103 %indvars.iv.next = add i64 %indvars.iv, 1
104 %lftr.wideiv = trunc i64 %indvars.iv.next to i32
105 %exitcond = icmp eq i32 %lftr.wideiv, 256
106 br i1 %exitcond, label %9, label %1
108 ; <label>:9 ; preds = %7