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annotate test/Transforms/LoopVectorize/runtime-check.ll @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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children 60c9769439b8
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: opt < %s -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -dce -instcombine -S | FileCheck %s
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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 ; Make sure we vectorize this loop:
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7 ; int foo(float *a, float *b, int n) {
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8 ; for (int i=0; i<n; ++i)
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9 ; a[i] = b[i] * 3;
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10 ; }
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11
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12 ;CHECK: for.body.preheader:
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13 ;CHECK: br i1 %cmp.zero, label %middle.block, label %vector.memcheck
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14 ;CHECK: vector.memcheck:
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15 ;CHECK: br i1 %memcheck.conflict, label %middle.block, label %vector.ph
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16 ;CHECK: load <4 x float>
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17 define i32 @foo(float* nocapture %a, float* nocapture %b, i32 %n) nounwind uwtable ssp {
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18 entry:
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19 %cmp6 = icmp sgt i32 %n, 0
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20 br i1 %cmp6, label %for.body, label %for.end
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21
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22 for.body: ; preds = %entry, %for.body
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23 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
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24 %arrayidx = getelementptr inbounds float* %b, i64 %indvars.iv
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25 %0 = load float* %arrayidx, align 4
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26 %mul = fmul float %0, 3.000000e+00
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27 %arrayidx2 = getelementptr inbounds float* %a, i64 %indvars.iv
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28 store float %mul, float* %arrayidx2, align 4
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29 %indvars.iv.next = add i64 %indvars.iv, 1
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30 %lftr.wideiv = trunc i64 %indvars.iv.next to i32
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31 %exitcond = icmp eq i32 %lftr.wideiv, %n
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32 br i1 %exitcond, label %for.end, label %for.body
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33
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34 for.end: ; preds = %for.body, %entry
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35 ret i32 undef
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36 }
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37
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38 ; Make sure that we try to vectorize loops with a runtime check if the
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39 ; dependency check fails.
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40
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41 ; CHECK-LABEL: test_runtime_check
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42 ; CHECK: <4 x float>
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43 define void @test_runtime_check(float* %a, float %b, i64 %offset, i64 %offset2, i64 %n) {
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44 entry:
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45 br label %for.body
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46
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47 for.body:
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48 %iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
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49 %ind.sum = add i64 %iv, %offset
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50 %arr.idx = getelementptr inbounds float* %a, i64 %ind.sum
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51 %l1 = load float* %arr.idx, align 4
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52 %ind.sum2 = add i64 %iv, %offset2
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53 %arr.idx2 = getelementptr inbounds float* %a, i64 %ind.sum2
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54 %l2 = load float* %arr.idx2, align 4
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55 %m = fmul fast float %b, %l2
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56 %ad = fadd fast float %l1, %m
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57 store float %ad, float* %arr.idx, align 4
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58 %iv.next = add nuw nsw i64 %iv, 1
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59 %exitcond = icmp eq i64 %iv.next, %n
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60 br i1 %exitcond, label %loopexit, label %for.body
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61
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62 loopexit:
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63 ret void
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64 }