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llvm-project/llvm/test/CodeGen/Hexagon/misched-top-rptracker-sync.ll

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Reset the TopRPTracker's position in ScheduleDAGMILive::initQueues ScheduleDAGMI::initQueues changes the RegionBegin to the first non-debug instruction. Since it does not track register pressure, it does not affect any RP trackers. ScheduleDAGMILive inherits initQueues from ScheduleDAGMI, and it does reset the TopTPTracker in its schedule method. Any derived, target-specific scheduler will need to do it as well, but the TopRPTracker is only exposed as a "const" object to derived classes. Without the ability to modify the tracker directly, this leaves a derived scheduler with a potential of having the TopRPTracker out-of-sync with the CurrentTop. The symptom of the problem: void llvm::ScheduleDAGMILive::scheduleMI(llvm::SUnit *, bool): Assertion `TopRPTracker.getPos() == CurrentTop && "out of sync"' failed. Differential Revision: http://reviews.llvm.org/D19438 llvm-svn: 267918
2016-04-29 03:17:44 +08:00
; RUN: llc -march=hexagon < %s
; REQUIRES: asserts
; Check that we no longer get this error:
; void llvm::ScheduleDAGMILive::scheduleMI(llvm::SUnit *, bool):
; Assertion `TopRPTracker.getPos() == CurrentTop && "out of sync"' failed.
target triple = "hexagon"
%struct.A = type { %struct.B*, %struct.B* }
%struct.B = type { i8*, %struct.B*, %struct.B* }
@.str.4 = external hidden unnamed_addr constant [41 x i8], align 1
@__func__.fred = external hidden unnamed_addr constant [16 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [43 x i8], align 1
; Function Attrs: nounwind
declare void @_Assert(i8*, i8*) #0
; Function Attrs: nounwind
define void @fred(%struct.A* %pA, %struct.B* %p) #0 !dbg !6 {
entry:
tail call void @llvm.dbg.value(metadata %struct.A* %pA, i64 0, metadata !26, metadata !28), !dbg !29
tail call void @llvm.dbg.value(metadata %struct.B* %p, i64 0, metadata !27, metadata !28), !dbg !30
%cmp = icmp eq %struct.B* %p, null, !dbg !31
br i1 %cmp, label %cond.false, label %cond.end, !dbg !31
cond.false: ; preds = %entry
tail call void @_Assert(i8* getelementptr inbounds ([41 x i8], [41 x i8]* @.str.4, i32 0, i32 0), i8* getelementptr inbounds ([16 x i8], [16 x i8]* @__func__.fred, i32 0, i32 0)) #0, !dbg !32
br label %cond.end, !dbg !32
cond.end: ; preds = %cond.false, %entry
%cmp1 = icmp eq %struct.A* %pA, null, !dbg !34
br i1 %cmp1, label %cond.false3, label %cond.end4, !dbg !34
cond.false3: ; preds = %cond.end
tail call void @_Assert(i8* getelementptr inbounds ([43 x i8], [43 x i8]* @.str.5, i32 0, i32 0), i8* getelementptr inbounds ([16 x i8], [16 x i8]* @__func__.fred, i32 0, i32 0)) #0, !dbg !35
br label %cond.end4, !dbg !35
cond.end4: ; preds = %cond.false3, %cond.end
%p2 = getelementptr inbounds %struct.A, %struct.A* %pA, i32 0, i32 0, !dbg !36
%0 = load %struct.B*, %struct.B** %p2, align 4, !dbg !38, !tbaa !39
%cmp5 = icmp eq %struct.B* %0, null, !dbg !44
br i1 %cmp5, label %if.then, label %if.end, !dbg !45
if.then: ; preds = %cond.end4
%p1 = getelementptr inbounds %struct.A, %struct.A* %pA, i32 0, i32 1, !dbg !46
store %struct.B* %p, %struct.B** %p1, align 4, !dbg !48, !tbaa !49
store %struct.B* %p, %struct.B** %p2, align 4, !dbg !50, !tbaa !39
%p4 = getelementptr inbounds %struct.B, %struct.B* %p, i32 0, i32 1, !dbg !51
store %struct.B* null, %struct.B** %p4, align 4, !dbg !52, !tbaa !53
%p5 = getelementptr inbounds %struct.B, %struct.B* %p, i32 0, i32 2, !dbg !55
store %struct.B* null, %struct.B** %p5, align 4, !dbg !56, !tbaa !57
br label %return, !dbg !58
if.end: ; preds = %cond.end4
%1 = ptrtoint %struct.B* %0 to i32, !dbg !59
%p57 = getelementptr inbounds %struct.B, %struct.B* %p, i32 0, i32 2, !dbg !60
store %struct.B* null, %struct.B** %p57, align 4, !dbg !61, !tbaa !57
%p49 = getelementptr inbounds %struct.B, %struct.B* %p, i32 0, i32 1, !dbg !62
%2 = bitcast %struct.B** %p49 to i32*, !dbg !63
store i32 %1, i32* %2, align 4, !dbg !63, !tbaa !53
%p511 = getelementptr inbounds %struct.B, %struct.B* %0, i32 0, i32 2, !dbg !64
store %struct.B* %p, %struct.B** %p511, align 4, !dbg !65, !tbaa !57
store %struct.B* %p, %struct.B** %p2, align 4, !dbg !66, !tbaa !39
br label %return, !dbg !67
return: ; preds = %if.end, %if.then
ret void, !dbg !68
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
attributes #0 = { nounwind }
attributes #1 = { nounwind readnone }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4}
!llvm.ident = !{!5}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 (http://llvm.org/git/clang.git 4b380bc1db8b0c72bdbdaf0e4697b1a84100a369) (http://llvm.org/git/llvm.git 6217a62bc009d55e160dbb694f2e94a22c80809f)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "bug.c", directory: "/")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{!"clang version 3.9.0 (http://llvm.org/git/clang.git 4b380bc1db8b0c72bdbdaf0e4697b1a84100a369) (http://llvm.org/git/llvm.git 6217a62bc009d55e160dbb694f2e94a22c80809f)"}
!6 = distinct !DISubprogram(name: "fred", scope: !1, file: !1, line: 138, type: !7, isLocal: false, isDefinition: true, scopeLine: 139, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !25)
!7 = !DISubroutineType(types: !8)
!8 = !{null, !9, !15}
!9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 32, align: 32)
!10 = !DIDerivedType(tag: DW_TAG_typedef, name: "A", file: !11, line: 57, baseType: !12)
!11 = !DIFile(filename: "bug.h", directory: "/")
!12 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !11, line: 54, size: 64, align: 32, elements: !13)
!13 = !{!14, !24}
!14 = !DIDerivedType(tag: DW_TAG_member, name: "p2", scope: !12, file: !11, line: 55, baseType: !15, size: 32, align: 32)
!15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 32, align: 32)
!16 = !DIDerivedType(tag: DW_TAG_typedef, name: "B", file: !11, line: 50, baseType: !17)
!17 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "B", file: !11, line: 45, size: 96, align: 32, elements: !18)
!18 = !{!19, !21, !23}
!19 = !DIDerivedType(tag: DW_TAG_member, name: "p3", scope: !17, file: !11, line: 47, baseType: !20, size: 32, align: 32)
!20 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 32, align: 32)
!21 = !DIDerivedType(tag: DW_TAG_member, name: "p4", scope: !17, file: !11, line: 48, baseType: !22, size: 32, align: 32, offset: 32)
!22 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !17, size: 32, align: 32)
!23 = !DIDerivedType(tag: DW_TAG_member, name: "p5", scope: !17, file: !11, line: 49, baseType: !22, size: 32, align: 32, offset: 64)
!24 = !DIDerivedType(tag: DW_TAG_member, name: "p1", scope: !12, file: !11, line: 56, baseType: !15, size: 32, align: 32, offset: 32)
!25 = !{!26, !27}
!26 = !DILocalVariable(name: "pA", arg: 1, scope: !6, file: !1, line: 138, type: !9)
!27 = !DILocalVariable(name: "p", arg: 2, scope: !6, file: !1, line: 138, type: !15)
!28 = !DIExpression()
!29 = !DILocation(line: 138, column: 34, scope: !6)
!30 = !DILocation(line: 138, column: 57, scope: !6)
!31 = !DILocation(line: 140, column: 5, scope: !6)
!32 = !DILocation(line: 140, column: 5, scope: !33)
!33 = !DILexicalBlockFile(scope: !6, file: !1, discriminator: 2)
!34 = !DILocation(line: 141, column: 5, scope: !6)
!35 = !DILocation(line: 141, column: 5, scope: !33)
!36 = !DILocation(line: 143, column: 30, scope: !37)
!37 = distinct !DILexicalBlock(scope: !6, file: !1, line: 143, column: 9)
!38 = !DILocation(line: 155, column: 18, scope: !6)
!39 = !{!40, !41, i64 0}
!40 = !{!"", !41, i64 0, !41, i64 4}
!41 = !{!"any pointer", !42, i64 0}
!42 = !{!"omnipotent char", !43, i64 0}
!43 = !{!"Simple C/C++ TBAA"}
!44 = !DILocation(line: 143, column: 14, scope: !37)
!45 = !DILocation(line: 143, column: 9, scope: !6)
!46 = !DILocation(line: 146, column: 26, scope: !47)
!47 = distinct !DILexicalBlock(scope: !37, file: !1, line: 143, column: 41)
!48 = !DILocation(line: 146, column: 36, scope: !47)
!49 = !{!40, !41, i64 4}
!50 = !DILocation(line: 145, column: 32, scope: !47)
!51 = !DILocation(line: 147, column: 20, scope: !47)
!52 = !DILocation(line: 147, column: 29, scope: !47)
!53 = !{!54, !41, i64 4}
!54 = !{!"B", !41, i64 0, !41, i64 4, !41, i64 8}
!55 = !DILocation(line: 148, column: 20, scope: !47)
!56 = !DILocation(line: 148, column: 29, scope: !47)
!57 = !{!54, !41, i64 8}
!58 = !DILocation(line: 149, column: 9, scope: !47)
!59 = !DILocation(line: 154, column: 41, scope: !6)
!60 = !DILocation(line: 153, column: 16, scope: !6)
!61 = !DILocation(line: 153, column: 25, scope: !6)
!62 = !DILocation(line: 154, column: 16, scope: !6)
!63 = !DILocation(line: 154, column: 26, scope: !6)
!64 = !DILocation(line: 155, column: 29, scope: !6)
!65 = !DILocation(line: 155, column: 39, scope: !6)
!66 = !DILocation(line: 156, column: 28, scope: !6)
!67 = !DILocation(line: 157, column: 1, scope: !6)
!68 = !DILocation(line: 157, column: 1, scope: !69)
!69 = !DILexicalBlockFile(scope: !6, file: !1, discriminator: 1)