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annotate llvm/test/Transforms/IndVarSimplify/bbi-63564.ll @ 252:1f2b6ac9f198 llvm-original

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LLVM16-1
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Fri, 18 Aug 2023 09:04:13 +0900
parents c4bab56944e8
children
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1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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2 ; RUN: opt -passes='loop-mssa(indvars,indvars)' -S < %s | FileCheck %s
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3
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4 target triple = "x86_64-unknown-linux-gnu"
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5
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6 @c = external global i16, align 1
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7 @a = external global i16, align 1
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8
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9 ; When we delete %c.promoted, we need to ensure we clear the getSCEVAtScope
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10 ; cache or we'll crash trying to access loop disposition of the exit value
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11 ; for the remaining IV.
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12 define void @f() {
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13 ; CHECK-LABEL: @f(
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14 ; CHECK-NEXT: entry:
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15 ; CHECK-NEXT: br label [[FOR_COND:%.*]]
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16 ; CHECK: for.cond:
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17 ; CHECK-NEXT: br i1 false, label [[FOR_BODY:%.*]], label [[FOR_END4:%.*]]
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18 ; CHECK: for.body:
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19 ; CHECK-NEXT: br label [[FOR_BODY2:%.*]]
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20 ; CHECK: for.body2:
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21 ; CHECK-NEXT: [[INC2:%.*]] = phi i16 [ undef, [[FOR_BODY]] ], [ [[INC:%.*]], [[FOR_BODY2]] ]
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22 ; CHECK-NEXT: [[INC]] = add nuw nsw i16 [[INC2]], 1
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23 ; CHECK-NEXT: store i16 [[INC]], ptr undef, align 1
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24 ; CHECK-NEXT: br i1 true, label [[FOR_BODY2]], label [[CRIT_EDGE:%.*]]
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25 ; CHECK: crit_edge:
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26 ; CHECK-NEXT: [[INC_LCSSA:%.*]] = phi i16 [ [[INC]], [[FOR_BODY2]] ]
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27 ; CHECK-NEXT: store i16 [[INC_LCSSA]], ptr @a, align 1
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28 ; CHECK-NEXT: unreachable
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29 ; CHECK: for.end4:
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30 ; CHECK-NEXT: ret void
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31 ;
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32 entry:
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33 br label %for.cond
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34
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35 for.cond: ; preds = %entry
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36 br i1 false, label %for.body, label %for.end4
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37
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38 for.body: ; preds = %for.cond
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39 %c.promoted = load i16, ptr @c, align 1
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40 br label %for.body2
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41
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42 for.body2: ; preds = %for.body2, %for.body
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43 %inc33 = phi i16 [ %c.promoted, %for.body ], [ %inc3, %for.body2 ]
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44 %inc2 = phi i16 [ undef, %for.body ], [ %inc, %for.body2 ]
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45 %inc = add nsw i16 %inc2, 1
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46 store i16 %inc, ptr undef, align 1
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47 %inc3 = add nsw i16 %inc33, 1
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48 %tobool = icmp ne i16 %inc3, 0
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49 br i1 %tobool, label %for.body2, label %crit_edge
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50
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51 crit_edge: ; preds = %for.body2
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52 %inc.lcssa = phi i16 [ %inc, %for.body2 ]
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53 store i16 %inc.lcssa, ptr @a, align 1
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54 unreachable
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55
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56 for.end4: ; preds = %for.cond
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57 ret void
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58 }