| Krzysztof Parzyszek | 6448811 | 2016-08-31 13:52:17 +0000 | [diff] [blame] | 1 | ; RUN: llc -march=hexagon < %s | FileCheck %s |
| 2 | |
| 3 | ; The early return is predicated, and the save-restore code is mixed together: |
| 4 | ; { |
| 5 | ; p0 = cmp.eq(r0, #0) |
| 6 | ; if (p0.new) r17:16 = memd(r29 + #0) |
| 7 | ; memd(r29+#0) = r17:16 |
| 8 | ; } |
| 9 | ; { |
| 10 | ; if (p0) dealloc_return |
| 11 | ; } |
| 12 | ; The problem is that the load will execute before the store, clobbering the |
| 13 | ; pair r17:16. |
| 14 | ; |
| 15 | ; Check that the store and the load are not in the same packet. |
| 16 | ; CHECK: memd{{.*}} = r17:16 |
| 17 | ; CHECK: } |
| 18 | ; CHECK: r17:16 = memd |
| 19 | ; CHECK-LABEL: LBB0_1: |
| 20 | |
| 21 | target triple = "hexagon" |
| 22 | |
| 23 | %struct.0 = type { i8*, %struct.1*, %struct.2*, %struct.0*, %struct.0* } |
| 24 | %struct.1 = type { [60 x i8], i32, %struct.1* } |
| 25 | %struct.2 = type { i8, i8, i8, i8, %union.anon } |
| 26 | %union.anon = type { %struct.3* } |
| 27 | %struct.3 = type { %struct.3*, %struct.2* } |
| 28 | |
| 29 | @var = external hidden unnamed_addr global %struct.0*, align 4 |
| 30 | |
| 31 | declare void @bar(i8*, i32) local_unnamed_addr #0 |
| 32 | |
| 33 | define void @foo() local_unnamed_addr #1 { |
| 34 | entry: |
| 35 | %.pr = load %struct.0*, %struct.0** @var, align 4, !tbaa !1 |
| 36 | %cmp2 = icmp eq %struct.0* %.pr, null |
| 37 | br i1 %cmp2, label %while.end, label %while.body.preheader |
| 38 | |
| 39 | while.body.preheader: ; preds = %entry |
| 40 | br label %while.body |
| 41 | |
| 42 | while.body: ; preds = %while.body.preheader, %while.body |
| 43 | %0 = phi %struct.0* [ %4, %while.body ], [ %.pr, %while.body.preheader ] |
| 44 | %right = getelementptr inbounds %struct.0, %struct.0* %0, i32 0, i32 4 |
| 45 | %1 = bitcast %struct.0** %right to i32* |
| 46 | %2 = load i32, i32* %1, align 4, !tbaa !5 |
| 47 | %3 = bitcast %struct.0* %0 to i8* |
| 48 | tail call void @bar(i8* %3, i32 20) #1 |
| 49 | store i32 %2, i32* bitcast (%struct.0** @var to i32*), align 4, !tbaa !1 |
| 50 | %4 = inttoptr i32 %2 to %struct.0* |
| 51 | %cmp = icmp eq i32 %2, 0 |
| 52 | br i1 %cmp, label %while.end.loopexit, label %while.body |
| 53 | |
| 54 | while.end.loopexit: ; preds = %while.body |
| 55 | br label %while.end |
| 56 | |
| 57 | while.end: ; preds = %while.end.loopexit, %entry |
| 58 | ret void |
| 59 | } |
| 60 | |
| 61 | attributes #0 = { optsize } |
| 62 | attributes #1 = { nounwind optsize } |
| 63 | |
| 64 | !1 = !{!2, !2, i64 0} |
| 65 | !2 = !{!"any pointer", !3, i64 0} |
| 66 | !3 = !{!"omnipotent char", !4, i64 0} |
| 67 | !4 = !{!"Simple C/C++ TBAA"} |
| 68 | !5 = !{!6, !2, i64 16} |
| 69 | !6 = !{!"0", !2, i64 0, !2, i64 4, !2, i64 8, !2, i64 12, !2, i64 16} |