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annotate test/Transforms/LoopVectorize/same-base-access.ll @ 100:7d135dc70f03 LLVM 3.9

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LLVM 3.9
author Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
date Tue, 26 Jan 2016 22:53:40 +0900
parents afa8332a0e37
children 1172e4bd9c6f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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83
60c9769439b8 LLVM 3.7
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 0
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1 ; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -dce -instcombine -S -enable-if-conversion | FileCheck %s
0
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2
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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"
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4 target triple = "x86_64-apple-macosx10.9.0"
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5
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6 ; This is kernel11 from "LivermoreLoops". We can't vectorize it because we
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7 ; access both x[k] and x[k-1].
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8 ;
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9 ; void kernel11(double *x, double *y, int n) {
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10 ; for ( int k=1 ; k<n ; k++ )
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11 ; x[k] = x[k-1] + y[k];
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12 ; }
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13
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14 ; CHECK-LABEL: @kernel11(
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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15 ; CHECK-NOT: <4 x double>
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16 ; CHECK: ret
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17 define i32 @kernel11(double* %x, double* %y, i32 %n) nounwind uwtable ssp {
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18 %1 = alloca double*, align 8
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19 %2 = alloca double*, align 8
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20 %3 = alloca i32, align 4
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21 %k = alloca i32, align 4
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22 store double* %x, double** %1, align 8
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23 store double* %y, double** %2, align 8
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24 store i32 %n, i32* %3, align 4
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25 store i32 1, i32* %k, align 4
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26 br label %4
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27
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28 ; <label>:4 ; preds = %25, %0
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29 %5 = load i32, i32* %k, align 4
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30 %6 = load i32, i32* %3, align 4
0
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31 %7 = icmp slt i32 %5, %6
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32 br i1 %7, label %8, label %28
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33
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34 ; <label>:8 ; preds = %4
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35 %9 = load i32, i32* %k, align 4
0
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36 %10 = sub nsw i32 %9, 1
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37 %11 = sext i32 %10 to i64
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38 %12 = load double*, double** %1, align 8
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39 %13 = getelementptr inbounds double, double* %12, i64 %11
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40 %14 = load double, double* %13, align 8
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parents: 83
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41 %15 = load i32, i32* %k, align 4
0
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42 %16 = sext i32 %15 to i64
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43 %17 = load double*, double** %2, align 8
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parents: 83
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44 %18 = getelementptr inbounds double, double* %17, i64 %16
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parents: 83
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45 %19 = load double, double* %18, align 8
0
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46 %20 = fadd double %14, %19
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47 %21 = load i32, i32* %k, align 4
0
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48 %22 = sext i32 %21 to i64
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49 %23 = load double*, double** %1, align 8
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parents: 83
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50 %24 = getelementptr inbounds double, double* %23, i64 %22
0
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51 store double %20, double* %24, align 8
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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52 br label %25
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53
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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54 ; <label>:25 ; preds = %8
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55 %26 = load i32, i32* %k, align 4
0
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56 %27 = add nsw i32 %26, 1
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57 store i32 %27, i32* %k, align 4
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58 br label %4
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59
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60 ; <label>:28 ; preds = %4
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61 ret i32 0
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62 }
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63
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64
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65
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66 ; We don't vectorize this function because A[i*7] is scalarized, and the
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67 ; different scalars can in theory wrap around and overwrite other scalar
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68 ; elements. At the moment we only allow read/write access to arrays
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69 ; that are consecutive.
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70 ;
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71 ; void foo(int *a) {
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72 ; for (int i=0; i<256; ++i) {
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73 ; int x = a[i*7];
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74 ; if (x>3)
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75 ; x = x*x+x*4;
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76 ; a[i*7] = x+3;
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77 ; }
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78 ; }
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79
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80 ; CHECK-LABEL: @func2(
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81 ; CHECK-NOT: <4 x i32>
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82 ; CHECK: ret
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83 define i32 @func2(i32* nocapture %a) nounwind uwtable ssp {
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84 br label %1
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85
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86 ; <label>:1 ; preds = %7, %0
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87 %indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %7 ]
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88 %2 = mul nsw i64 %indvars.iv, 7
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89 %3 = getelementptr inbounds i32, i32* %a, i64 %2
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90 %4 = load i32, i32* %3, align 4
0
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91 %5 = icmp sgt i32 %4, 3
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92 br i1 %5, label %6, label %7
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93
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94 ; <label>:6 ; preds = %1
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95 %tmp = add i32 %4, 4
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96 %tmp1 = mul i32 %tmp, %4
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97 br label %7
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98
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99 ; <label>:7 ; preds = %6, %1
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100 %x.0 = phi i32 [ %tmp1, %6 ], [ %4, %1 ]
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101 %8 = add nsw i32 %x.0, 3
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102 store i32 %8, i32* %3, align 4
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103 %indvars.iv.next = add i64 %indvars.iv, 1
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104 %lftr.wideiv = trunc i64 %indvars.iv.next to i32
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105 %exitcond = icmp eq i32 %lftr.wideiv, 256
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106 br i1 %exitcond, label %9, label %1
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107
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108 ; <label>:9 ; preds = %7
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109 ret i32 0
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110 }