Mercurial > hg > CbC > CbC_llvm

annotate test/Transforms/IndVarSimplify/2014-06-21-congruent-constant.ll @ 123:923c9a525fb0

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rename IListTest.cpp
author mir3636
date Thu, 30 Nov 2017 18:21:27 +0900
parents afa8332a0e37
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 ; RUN: opt -S -loop-unswitch -instcombine -indvars < %s | FileCheck %s
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2
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3 ; This used to crash in SCEVExpander when there were congruent phis with and
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4 ; undef incoming value from the loop header. The -loop-unswitch -instcombine is
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5 ; necessary to create just this pattern, which is essentially a nop and gets
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6 ; folded away aggressively if spelled out in IR directly.
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7 ; PR 20093
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8
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9 @c = external global i32**, align 8
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10
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11 define void @test1() {
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12 entry:
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13 br i1 undef, label %for.end12, label %for.cond.preheader
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14
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15 for.cond.preheader: ; preds = %entry
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16 %0 = load i32**, i32*** @c, align 8
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17 %1 = load i32*, i32** %0, align 8
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18 %2 = load i32, i32* %1, align 4
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19 br label %for.body
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20
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21 for.body: ; preds = %for.cond.backedge, %for.body9.us, %for.cond.preheader
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22 %3 = phi i32* [ %1, %for.cond.preheader ], [ %3, %for.cond.backedge ], [ %6, %for.body9.us ]
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23 %4 = phi i32 [ %2, %for.cond.preheader ], [ undef, %for.cond.backedge ], [ %7, %for.body9.us ]
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24 %i.024 = phi i32 [ 0, %for.cond.preheader ], [ %inc, %for.cond.backedge ], [ 0, %for.body9.us ]
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25 %tobool1 = icmp eq i32 %4, 0
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26 br i1 %tobool1, label %if.end, label %for.cond.backedge
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28 if.end: ; preds = %for.body
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29 %5 = load i32, i32* %3, align 4
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30 %tobool4 = icmp eq i32 %5, 0
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31 br i1 %tobool4, label %for.cond3, label %for.body9.preheader
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32
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33 for.body9.preheader: ; preds = %if.end
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34 %tobool8 = icmp eq i32 %i.024, 1
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35 br i1 %tobool8, label %for.body9.us, label %for.body9
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37 for.body9.us: ; preds = %for.body9.preheader
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38 %6 = load i32*, i32** undef, align 8
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39 %7 = load i32, i32* %6, align 4
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40 br label %for.body
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42 for.cond3: ; preds = %for.cond3, %if.end
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43 br label %for.cond3
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45 for.body9: ; preds = %for.body9, %for.body9.preheader
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46 br label %for.body9
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48 for.cond.backedge: ; preds = %for.body
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49 %inc = add nsw i32 %i.024, 1
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50 br i1 false, label %for.body, label %for.end12
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52 for.end12: ; preds = %for.cond.backedge, %entry
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53 ret void
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54
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55 ; CHECK-LABEL: @test1
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56 ; CHECK-NOT: phi
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57 }