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annotate test/CodeGen/ARM/test-sharedidx.ll @ 95:afa8332a0e37

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LLVM 3.8
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Tue, 13 Oct 2015 17:48:58 +0900
parents 95c75e76d11b
children
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95c75e76d11b LLVM 3.4
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1 ; RUN: llc < %s -mtriple=armv7-apple-ios -mcpu=cortex-a9 -stress-ivchain | FileCheck %s
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2 ; REQUIRES: asserts
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3
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4 ; @sharedidx is an unrolled variant of this loop:
95c75e76d11b LLVM 3.4
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5 ; for (unsigned long i = 0; i < len; i += s) {
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6 ; c[i] = a[i] + b[i];
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7 ; }
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8 ; where 's' cannot be folded into the addressing mode.
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9 ;
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10 ; This is not quite profitable to chain. But with -stress-ivchain, we
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11 ; can form three address chains in place of the shared induction
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12 ; variable.
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13
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14 ; rdar://10674430
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15 define void @sharedidx(i8* nocapture %a, i8* nocapture %b, i8* nocapture %c, i32 %s, i32 %len) nounwind ssp {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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16 entry:
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17 ; CHECK-LABEL: sharedidx:
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18 %cmp8 = icmp eq i32 %len, 0
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19 br i1 %cmp8, label %for.end, label %for.body
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20
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21 for.body: ; preds = %entry, %for.body.3
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22 ; CHECK: %for.body
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23 ; CHECK: ldrb {{r[0-9]+|lr}}, [{{r[0-9]+|lr}}, {{r[0-9]+|lr}}]!
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24 ; CHECK: ldrb {{r[0-9]+|lr}}, [{{r[0-9]+|lr}}, {{r[0-9]+|lr}}]!
0
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25 %i.09 = phi i32 [ %add5.3, %for.body.3 ], [ 0, %entry ]
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26 %arrayidx = getelementptr inbounds i8, i8* %a, i32 %i.09
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27 %0 = load i8, i8* %arrayidx, align 1
0
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28 %conv6 = zext i8 %0 to i32
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29 %arrayidx1 = getelementptr inbounds i8, i8* %b, i32 %i.09
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30 %1 = load i8, i8* %arrayidx1, align 1
0
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31 %conv27 = zext i8 %1 to i32
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32 %add = add nsw i32 %conv27, %conv6
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33 %conv3 = trunc i32 %add to i8
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34 %arrayidx4 = getelementptr inbounds i8, i8* %c, i32 %i.09
0
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35 store i8 %conv3, i8* %arrayidx4, align 1
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36 %add5 = add i32 %i.09, %s
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37 %cmp = icmp ult i32 %add5, %len
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38 br i1 %cmp, label %for.body.1, label %for.end
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39
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40 for.end: ; preds = %for.body, %for.body.1, %for.body.2, %for.body.3, %entry
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41 ret void
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42
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43 for.body.1: ; preds = %for.body
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44 ; CHECK: %for.body.1
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45 ; CHECK: ldrb {{r[0-9]+|lr}}, [{{r[0-9]+|lr}}, {{r[0-9]+|lr}}]!
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46 ; CHECK: ldrb {{r[0-9]+|lr}}, [{{r[0-9]+|lr}}, {{r[0-9]+|lr}}]!
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47 %arrayidx.1 = getelementptr inbounds i8, i8* %a, i32 %add5
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48 %2 = load i8, i8* %arrayidx.1, align 1
0
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49 %conv6.1 = zext i8 %2 to i32
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50 %arrayidx1.1 = getelementptr inbounds i8, i8* %b, i32 %add5
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51 %3 = load i8, i8* %arrayidx1.1, align 1
0
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52 %conv27.1 = zext i8 %3 to i32
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53 %add.1 = add nsw i32 %conv27.1, %conv6.1
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54 %conv3.1 = trunc i32 %add.1 to i8
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55 %arrayidx4.1 = getelementptr inbounds i8, i8* %c, i32 %add5
0
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56 store i8 %conv3.1, i8* %arrayidx4.1, align 1
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57 %add5.1 = add i32 %add5, %s
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58 %cmp.1 = icmp ult i32 %add5.1, %len
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59 br i1 %cmp.1, label %for.body.2, label %for.end
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60
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61 for.body.2: ; preds = %for.body.1
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62 %arrayidx.2 = getelementptr inbounds i8, i8* %a, i32 %add5.1
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63 %4 = load i8, i8* %arrayidx.2, align 1
0
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64 %conv6.2 = zext i8 %4 to i32
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65 %arrayidx1.2 = getelementptr inbounds i8, i8* %b, i32 %add5.1
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66 %5 = load i8, i8* %arrayidx1.2, align 1
0
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67 %conv27.2 = zext i8 %5 to i32
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68 %add.2 = add nsw i32 %conv27.2, %conv6.2
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69 %conv3.2 = trunc i32 %add.2 to i8
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70 %arrayidx4.2 = getelementptr inbounds i8, i8* %c, i32 %add5.1
0
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71 store i8 %conv3.2, i8* %arrayidx4.2, align 1
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72 %add5.2 = add i32 %add5.1, %s
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73 %cmp.2 = icmp ult i32 %add5.2, %len
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74 br i1 %cmp.2, label %for.body.3, label %for.end
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75
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76 for.body.3: ; preds = %for.body.2
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77 ; CHECK: %for.body.3
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78 ; CHECK: ldrb {{r[0-9]+|lr}}, [{{r[0-9]+|lr}}, {{r[0-9]+|lr}}]!
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79 ; CHECK: ldrb {{r[0-9]+|lr}}, [{{r[0-9]+|lr}}, {{r[0-9]+|lr}}]!
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80 %arrayidx.3 = getelementptr inbounds i8, i8* %a, i32 %add5.2
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81 %6 = load i8, i8* %arrayidx.3, align 1
0
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82 %conv6.3 = zext i8 %6 to i32
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83 %arrayidx1.3 = getelementptr inbounds i8, i8* %b, i32 %add5.2
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84 %7 = load i8, i8* %arrayidx1.3, align 1
0
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85 %conv27.3 = zext i8 %7 to i32
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86 %add.3 = add nsw i32 %conv27.3, %conv6.3
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87 %conv3.3 = trunc i32 %add.3 to i8
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88 %arrayidx4.3 = getelementptr inbounds i8, i8* %c, i32 %add5.2
0
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89 store i8 %conv3.3, i8* %arrayidx4.3, align 1
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90 %add5.3 = add i32 %add5.2, %s
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91 %cmp.3 = icmp ult i32 %add5.3, %len
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92 br i1 %cmp.3, label %for.body, label %for.end
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93 }