Mercurial > hg > CbC > CbC_llvm

annotate test/Analysis/BasicAA/phi-aa.ll @ 120:1172e4bd9c6f

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update 4.0.0
author mir3636
date Fri, 25 Nov 2016 19:14:25 +0900
parents afa8332a0e37
children c2174574ed3a
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1 ; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
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2 ; RUN: opt < %s -aa-pipeline=basic-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
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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-unknown-linux-gnu"
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6 ; rdar://7282591
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7
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8 @X = common global i32 0
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9 @Y = common global i32 0
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10 @Z = common global i32 0
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11
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12 ; CHECK-LABEL: foo
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13 ; CHECK: NoAlias: i32* %P, i32* @Z
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15 define void @foo(i32 %cond) nounwind {
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16 entry:
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17 %"alloca point" = bitcast i32 0 to i32
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18 %tmp = icmp ne i32 %cond, 0
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19 br i1 %tmp, label %bb, label %bb1
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21 bb:
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22 br label %bb2
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24 bb1:
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25 br label %bb2
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27 bb2:
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28 %P = phi i32* [ @X, %bb ], [ @Y, %bb1 ]
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29 %tmp1 = load i32, i32* @Z, align 4
0
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30 store i32 123, i32* %P, align 4
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31 %tmp2 = load i32, i32* @Z, align 4
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32 br label %return
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33
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34 return:
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35 ret void
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36 }
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38 ; Pointers can vary in between iterations of loops.
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39 ; PR18068
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41 ; CHECK-LABEL: pr18068
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42 ; CHECK: MayAlias: i32* %0, i32* %arrayidx5
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43 ; CHECK: NoAlias: i32* %arrayidx13, i32* %arrayidx5
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45 define i32 @pr18068(i32* %jj7, i32* %j) {
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46 entry:
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47 %oa5 = alloca [100 x i32], align 16
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48 br label %codeRepl
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49
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50 codeRepl:
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51 %0 = phi i32* [ %arrayidx13, %for.body ], [ %j, %entry ]
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52 %targetBlock = call i1 @cond(i32* %jj7)
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53 br i1 %targetBlock, label %for.body, label %bye
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55 for.body:
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56 %1 = load i32, i32* %jj7, align 4
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57 %idxprom4 = zext i32 %1 to i64
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58 %arrayidx5 = getelementptr inbounds [100 x i32], [100 x i32]* %oa5, i64 0, i64 %idxprom4
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59 %2 = load i32, i32* %arrayidx5, align 4
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60 %sub6 = sub i32 %2, 6
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61 store i32 %sub6, i32* %arrayidx5, align 4
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62 ; %0 and %arrayidx5 can alias! It is not safe to DSE the above store.
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63 %3 = load i32, i32* %0, align 4
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64 store i32 %3, i32* %arrayidx5, align 4
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65 %sub11 = add i32 %1, -1
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66 %idxprom12 = zext i32 %sub11 to i64
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67 %arrayidx13 = getelementptr inbounds [100 x i32], [100 x i32]* %oa5, i64 0, i64 %idxprom12
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68 call void @inc(i32* %jj7)
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69 br label %codeRepl
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71 bye:
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72 %.reload = load i32, i32* %jj7, align 4
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73 ret i32 %.reload
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74 }
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76 declare i1 @cond(i32*)
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78 declare void @inc(i32*)
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