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120
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1 ; RUN: llc -march=hexagon < %s | FileCheck %s
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2
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3 ; The early return is predicated, and the save-restore code is mixed together:
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4 ; {
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5 ; p0 = cmp.eq(r0, #0)
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6 ; if (p0.new) r17:16 = memd(r29 + #0)
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7 ; memd(r29+#0) = r17:16
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8 ; }
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9 ; {
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10 ; if (p0) dealloc_return
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11 ; }
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12 ; The problem is that the load will execute before the store, clobbering the
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13 ; pair r17:16.
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14 ;
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15 ; Check that the store and the load are not in the same packet.
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16 ; CHECK: memd{{.*}} = r17:16
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17 ; CHECK: }
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18 ; CHECK: r17:16 = memd
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19 ; CHECK-LABEL: LBB0_1:
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20
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21 target triple = "hexagon"
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22
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23 %struct.0 = type { i8*, %struct.1*, %struct.2*, %struct.0*, %struct.0* }
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24 %struct.1 = type { [60 x i8], i32, %struct.1* }
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25 %struct.2 = type { i8, i8, i8, i8, %union.anon }
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26 %union.anon = type { %struct.3* }
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27 %struct.3 = type { %struct.3*, %struct.2* }
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28
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29 @var = external hidden unnamed_addr global %struct.0*, align 4
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30
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31 declare void @bar(i8*, i32) local_unnamed_addr #0
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32
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33 define void @foo() local_unnamed_addr #1 {
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34 entry:
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35 %.pr = load %struct.0*, %struct.0** @var, align 4, !tbaa !1
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36 %cmp2 = icmp eq %struct.0* %.pr, null
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37 br i1 %cmp2, label %while.end, label %while.body.preheader
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38
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39 while.body.preheader: ; preds = %entry
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40 br label %while.body
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41
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42 while.body: ; preds = %while.body.preheader, %while.body
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43 %0 = phi %struct.0* [ %4, %while.body ], [ %.pr, %while.body.preheader ]
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44 %right = getelementptr inbounds %struct.0, %struct.0* %0, i32 0, i32 4
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45 %1 = bitcast %struct.0** %right to i32*
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46 %2 = load i32, i32* %1, align 4, !tbaa !5
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47 %3 = bitcast %struct.0* %0 to i8*
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48 tail call void @bar(i8* %3, i32 20) #1
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49 store i32 %2, i32* bitcast (%struct.0** @var to i32*), align 4, !tbaa !1
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50 %4 = inttoptr i32 %2 to %struct.0*
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51 %cmp = icmp eq i32 %2, 0
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52 br i1 %cmp, label %while.end.loopexit, label %while.body
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53
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54 while.end.loopexit: ; preds = %while.body
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55 br label %while.end
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56
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57 while.end: ; preds = %while.end.loopexit, %entry
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58 ret void
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59 }
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60
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61 attributes #0 = { optsize }
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62 attributes #1 = { nounwind optsize }
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63
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64 !1 = !{!2, !2, i64 0}
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65 !2 = !{!"any pointer", !3, i64 0}
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66 !3 = !{!"omnipotent char", !4, i64 0}
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67 !4 = !{!"Simple C/C++ TBAA"}
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68 !5 = !{!6, !2, i64 16}
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69 !6 = !{!"0", !2, i64 0, !2, i64 4, !2, i64 8, !2, i64 12, !2, i64 16}
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