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150
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1 ; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-optree -analyze < %s | FileCheck %s -match-full-lines
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2 ;
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3 ; To forward %val, B[j] cannot be reused in bodyC because it is overwritten
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4 ; between. Verify that instead the alternative C[j] is used.
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5 ;
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6 ; for (int j = 0; j < n; j += 1) {
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7 ; bodyA:
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8 ; double val = B[j];
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9 ;
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10 ; bodyB:
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11 ; B[j] = 0;
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12 ; C[j] = val;
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13 ;
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14 ; bodyC:
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15 ; A[j] = val;
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16 ; }
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17 ;
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18 define void @func(i32 %n, double* noalias nonnull %A, double* noalias nonnull %B, double* noalias nonnull %C) {
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19 entry:
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20 br label %for
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21
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22 for:
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23 %j = phi i32 [0, %entry], [%j.inc, %inc]
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24 %j.cmp = icmp slt i32 %j, %n
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25 br i1 %j.cmp, label %bodyA, label %exit
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26
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27 bodyA:
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28 %B_idx = getelementptr inbounds double, double* %B, i32 %j
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29 %val = load double, double* %B_idx
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30 br label %bodyB
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31
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32 bodyB:
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33 store double 0.0, double* %B_idx
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34 %C_idx = getelementptr inbounds double, double* %C, i32 %j
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35 store double %val, double* %C_idx
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36 br label %bodyC
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37
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38 bodyC:
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39 %A_idx = getelementptr inbounds double, double* %A, i32 %j
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40 store double %val, double* %A_idx
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41 br label %inc
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42
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43 inc:
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44 %j.inc = add nuw nsw i32 %j, 1
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45 br label %for
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46
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47 exit:
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48 br label %return
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49
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50 return:
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51 ret void
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52 }
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53
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54
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55 ; CHECK: Statistics {
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56 ; CHECK: Known loads forwarded: 2
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57 ; CHECK: Operand trees forwarded: 2
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58 ; CHECK: Statements with forwarded operand trees: 2
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59 ; CHECK: }
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60
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61 ; CHECK-NEXT: After statements {
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62 ; CHECK-NEXT: Stmt_bodyA
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63 ; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
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64 ; CHECK-NEXT: [n] -> { Stmt_bodyA[i0] -> MemRef_B[i0] };
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65 ; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
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66 ; CHECK-NEXT: [n] -> { Stmt_bodyA[i0] -> MemRef_val[] };
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67 ; CHECK-NEXT: Instructions {
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173
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68 ; CHECK-NEXT: %val = load double, double* %B_idx, align 8
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150
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69 ; CHECK-NEXT: }
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70 ; CHECK-NEXT: Stmt_bodyB
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71 ; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
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72 ; CHECK-NEXT: ;
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73 ; CHECK-NEXT: new: [n] -> { Stmt_bodyB[i0] -> MemRef_B[i0] };
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74 ; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
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75 ; CHECK-NEXT: [n] -> { Stmt_bodyB[i0] -> MemRef_B[i0] };
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76 ; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
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77 ; CHECK-NEXT: [n] -> { Stmt_bodyB[i0] -> MemRef_C[i0] };
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78 ; CHECK-NEXT: Instructions {
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173
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79 ; CHECK-NEXT: %val = load double, double* %B_idx, align 8
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80 ; CHECK-NEXT: store double 0.000000e+00, double* %B_idx, align 8
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81 ; CHECK-NEXT: store double %val, double* %C_idx, align 8
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150
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82 ; CHECK-NEXT: }
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83 ; CHECK-NEXT: Stmt_bodyC
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84 ; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
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85 ; CHECK-NEXT: ;
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86 ; CHECK-NEXT: new: [n] -> { Stmt_bodyC[i0] -> MemRef_C[i0] };
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87 ; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
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88 ; CHECK-NEXT: [n] -> { Stmt_bodyC[i0] -> MemRef_A[i0] };
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89 ; CHECK-NEXT: Instructions {
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173
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90 ; CHECK-NEXT: %val = load double, double* %B_idx, align 8
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91 ; CHECK-NEXT: store double %val, double* %A_idx, align 8
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150
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92 ; CHECK-NEXT: }
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93 ; CHECK-NEXT: }
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