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annotate test/Analysis/BasicAA/dag.ll @ 95:afa8332a0e37 LLVM3.8

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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: opt < %s -basicaa -aa-eval -print-all-alias-modref-info 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"
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5 ; BasicAA's guard against use-def cycles shouldn't prevent it from
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6 ; analyzing use-def dags.
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8 ; CHECK: MustAlias: i8* %base, i8* %phi
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9 ; CHECK: MustAlias: i8* %phi, i8* %wwa
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10 ; CHECK: MustAlias: i8* %phi, i8* %wwb
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11 ; CHECK: MustAlias: i16* %bigbase, i8* %phi
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12 define i8 @foo(i8* %base, i1 %x, i1 %w) {
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13 entry:
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14 br i1 %w, label %wa, label %wb
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15 wa:
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16 %wwa = bitcast i8* %base to i8*
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17 br label %wc
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18 wb:
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19 %wwb = bitcast i8* %base to i8*
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20 br label %wc
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21 wc:
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22 %first = phi i8* [ %wwa, %wa ], [ %wwb, %wb ]
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23 %fc = bitcast i8* %first to i8*
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24 br i1 %x, label %xa, label %xb
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25 xa:
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26 %xxa = bitcast i8* %fc to i8*
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27 br label %xc
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28 xb:
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29 %xxb = bitcast i8* %fc to i8*
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30 br label %xc
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31 xc:
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32 %phi = phi i8* [ %xxa, %xa ], [ %xxb, %xb ]
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33
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34 store i8 0, i8* %phi
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36 %bigbase = bitcast i8* %base to i16*
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37 store i16 -1, i16* %bigbase
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39 %loaded = load i8, i8* %phi
0
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40 ret i8 %loaded
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41 }