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clang-p2996/llvm/test/CodeGen/Hexagon/misched-top-rptracker-sync.ll
Shiva Chen 2c864551df [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 
In order to set breakpoints on labels and list source code around
labels, we need collect debug information for labels, i.e., label
name, the function label belong, line number in the file, and the
address label located. In order to keep these information in LLVM
IR and to allow backend to generate debug information correctly.
We create a new kind of metadata for labels, DILabel. The format
of DILabel is

!DILabel(scope: !1, name: "foo", file: !2, line: 3)

We hope to keep debug information as much as possible even the
code is optimized. So, we create a new kind of intrinsic for label
metadata to avoid the metadata is eliminated with basic block.
The intrinsic will keep existing if we keep it from optimized out.
The format of the intrinsic is

llvm.dbg.label(metadata !1)

It has only one argument, that is the DILabel metadata. The
intrinsic will follow the label immediately. Backend could get the
label metadata through the intrinsic's parameter.

We also create DIBuilder API for labels to be used by Frontend.
Frontend could use createLabel() to allocate DILabel objects, and use
insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR.

Differential Revision: https://reviews.llvm.org/D45024

Patch by Hsiangkai Wang.

llvm-svn: 331841
2018-05-09 02:40:45 +00:00

152 lines
8.3 KiB
LLVM
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; 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, retainedNodes: !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)
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