shylie/llvm-project
1
0
Fork 0
Code Issues Pull Requests Actions 6 Packages Projects Releases Wiki Activity
llvm-project/llvm/test/DebugInfo/COFF/enum-co.ll
Martin Storsjö 36c64af9d7 [CodeGen] [WinException] Only produce handler data at the end of the function if needed 
If we are going to write handler data (that is written as variable
length data following after the unwind info in .xdata), we need to
emit the handler data immediately, but for cases where no such
info is going to be written, skip emitting it right away. (Unwind
info for all remaining functions that hasn't gotten it emitted
directly is emitted at the end.)

This does slightly change the ordering of sections (triggering a
bunch of updates to DebugInfo/COFF tests), but the change should be
benign.

This also matches GCC's assembly output, which doesn't output
.seh_handlerdata unless it actually is needed.

For ARM64, the unwind info can be packed into the runtime function
entry itself (leaving no data in the .xdata section at all), but
that can only be done if there's no follow-on data in the .xdata
section. If emission of the unwind info is triggered via
EmitWinEHHandlerData (or the .seh_handlerdata directive), which
implicitly switches to the .xdata section, there's a chance of the
caller wanting to pass further data there, so the packed format
can't be used in that case.

Differential Revision: https://reviews.llvm.org/D87448
2020-09-21 23:42:59 +03:00

181 lines
8.6 KiB
LLVM
Raw Blame History

; RUN: llc < %s -filetype=obj | llvm-readobj - --codeview | FileCheck %s
; RUN: llc < %s | llvm-mc -filetype=obj --triple=x86_64-windows | llvm-readobj - --codeview | FileCheck %s
; Command to generate enum-co.ll
; $ clang++ enum-co.cpp -S -emit-llvm -g -gcodeview -o enum-co.ll
;
;
; #define DEFINE_FUNCTION(T) \
; T Func_##T(T &arg) { return arg; };
;
; enum Enum { ON, OFF }; // Expect: CO = HasUniqueName
; Enum Func_Enum(Enum &arg) { return arg; }
;
; enum class EnumClass { RED, BLUE, NOTCARE }; // Expect: CO = HasUniqueName
; EnumClass Func_EnumClass(EnumClass &arg) { return arg; }
;
; void Func() {
; enum ScopedEnum { ON, OFF }; // Expected: CO = HasUniqueName | Scoped
; ScopedEnum SE;
;
; struct Struct {
; union Union {
; enum NestedEnum { RED, BLUE }; // Expected: CO = HasUniqueName | Nested
; };
; Union U;
; };
; Struct S;
; }
; CHECK: Format: COFF-x86-64
; CHECK: Arch: x86_64
; CHECK: AddressSize: 64bit
; CHECK: CodeViewTypes [
; CHECK: Section: .debug$T (5)
; CHECK: Magic: 0x4
; CHECK: Enum ({{.*}}) {
; CHECK: TypeLeafKind: LF_ENUM (0x1507)
; CHECK: NumEnumerators: 2
; CHECK: Properties [ (0x200)
; CHECK: HasUniqueName (0x200)
; CHECK: ]
; CHECK: UnderlyingType: int (0x74)
; CHECK: FieldListType: <field list> ({{.*}})
; CHECK: Name: Enum
; CHECK: LinkageName: .?AW4Enum@@
; CHECK: }
; CHECK: Enum ({{.*}}) {
; CHECK: TypeLeafKind: LF_ENUM (0x1507)
; CHECK: NumEnumerators: 3
; CHECK: Properties [ (0x200)
; CHECK: HasUniqueName (0x200)
; CHECK: ]
; CHECK: UnderlyingType: int (0x74)
; CHECK: FieldListType: <field list> ({{.*}})
; CHECK: Name: EnumClass
; CHECK: LinkageName: .?AW4EnumClass@@
; CHECK: }
; CHECK: Enum ({{.*}}) {
; CHECK: TypeLeafKind: LF_ENUM (0x1507)
; CHECK: NumEnumerators: 2
; CHECK: Properties [ (0x300)
; CHECK: HasUniqueName (0x200)
; CHECK: Scoped (0x100)
; CHECK: ]
; CHECK: UnderlyingType: int (0x74)
; CHECK: FieldListType: <field list> ({{.*}})
; CHECK: Func::ScopedEnum
; CHECK: LinkageName: .?AW4ScopedEnum@?1??Func@@YAXXZ@
; CHECK: }
; CHECK: Enum ({{.*}}) {
; CHECK: TypeLeafKind: LF_ENUM (0x1507)
; CHECK: NumEnumerators: 2
; CHECK: Properties [ (0x208)
; CHECK: HasUniqueName (0x200)
; CHECK: Nested (0x8)
; CHECK: ]
; CHECK: UnderlyingType: int (0x74)
; CHECK: FieldListType: <field list> ({{.*}})
; CHECK: Name: Func::Struct::Union::NestedEnum
; CHECK: LinkageName: .?AW4NestedEnum@Union@Struct@?1??Func@@YAXXZ@
; CHECK: }
; ModuleID = 'enum-co.cpp'
source_filename = "enum-co.cpp"
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc19.15.26729"
%struct.Struct = type { %"union.Func()::Struct::Union" }
%"union.Func()::Struct::Union" = type { i8 }
; Function Attrs: noinline nounwind optnone uwtable
define dso_local i32 @"?Func_Enum@@YA?AW4Enum@@AEAW41@@Z"(i32* dereferenceable(4) %arg) #0 !dbg !30 {
entry:
%arg.addr = alloca i32*, align 8
store i32* %arg, i32** %arg.addr, align 8
call void @llvm.dbg.declare(metadata i32** %arg.addr, metadata !34, metadata !DIExpression()), !dbg !35
%0 = load i32*, i32** %arg.addr, align 8, !dbg !35
%1 = load i32, i32* %0, align 4, !dbg !35
ret i32 %1, !dbg !35
}
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
; Function Attrs: noinline nounwind optnone uwtable
define dso_local i32 @"?Func_EnumClass@@YA?AW4EnumClass@@AEAW41@@Z"(i32* dereferenceable(4) %arg) #0 !dbg !36 {
entry:
%arg.addr = alloca i32*, align 8
store i32* %arg, i32** %arg.addr, align 8
call void @llvm.dbg.declare(metadata i32** %arg.addr, metadata !40, metadata !DIExpression()), !dbg !41
%0 = load i32*, i32** %arg.addr, align 8, !dbg !41
%1 = load i32, i32* %0, align 4, !dbg !41
ret i32 %1, !dbg !41
}
; Function Attrs: noinline nounwind optnone uwtable
define dso_local void @"?Func@@YAXXZ"() #0 !dbg !14 {
entry:
%SE = alloca i32, align 4
%S = alloca %struct.Struct, align 1
call void @llvm.dbg.declare(metadata i32* %SE, metadata !42, metadata !DIExpression()), !dbg !43
call void @llvm.dbg.declare(metadata %struct.Struct* %S, metadata !44, metadata !DIExpression()), !dbg !45
ret void, !dbg !46
}
attributes #0 = { noinline nounwind optnone uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind readnone speculatable }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!25, !26, !27, !28}
!llvm.ident = !{!29}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 8.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
!1 = !DIFile(filename: "enum-co.cpp", directory: "D:\5Cupstream\5Cllvm\5Ctest\5CDebugInfo\5CCOFF", checksumkind: CSK_MD5, checksum: "2e53b90441669acca735bad28ed3a1ab")
!2 = !{!3, !8, !13, !18}
!3 = !DICompositeType(tag: DW_TAG_enumeration_type, name: "Enum", file: !1, line: 4, baseType: !4, size: 32, elements: !5, identifier: ".?AW4Enum@@")
!4 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!5 = !{!6, !7}
!6 = !DIEnumerator(name: "ON", value: 0)
!7 = !DIEnumerator(name: "OFF", value: 1)
!8 = !DICompositeType(tag: DW_TAG_enumeration_type, name: "EnumClass", file: !1, line: 7, baseType: !4, size: 32, flags: DIFlagEnumClass, elements: !9, identifier: ".?AW4EnumClass@@")
!9 = !{!10, !11, !12}
!10 = !DIEnumerator(name: "RED", value: 0)
!11 = !DIEnumerator(name: "BLUE", value: 1)
!12 = !DIEnumerator(name: "NOTCARE", value: 2)
!13 = !DICompositeType(tag: DW_TAG_enumeration_type, name: "ScopedEnum", scope: !14, file: !1, line: 11, baseType: !4, size: 32, elements: !5, identifier: ".?AW4ScopedEnum@?1??Func@@YAXXZ@")
!14 = distinct !DISubprogram(name: "Func", linkageName: "?Func@@YAXXZ", scope: !1, file: !1, line: 10, type: !15, isLocal: false, isDefinition: true, scopeLine: 10, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !17)
!15 = !DISubroutineType(types: !16)
!16 = !{null}
!17 = !{}
!18 = !DICompositeType(tag: DW_TAG_enumeration_type, name: "NestedEnum", scope: !19, file: !1, line: 16, baseType: !4, size: 32, elements: !24, identifier: ".?AW4NestedEnum@Union@Struct@?1??Func@@YAXXZ@")
!19 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "Union", scope: !20, file: !1, line: 15, size: 8, flags: DIFlagTypePassByValue, elements: !23, identifier: ".?ATUnion@Struct@?1??Func@@YAXXZ@")
!20 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "Struct", scope: !14, file: !1, line: 14, size: 8, flags: DIFlagTypePassByValue, elements: !21, identifier: ".?AUStruct@?1??Func@@YAXXZ@")
!21 = !{!19, !22}
!22 = !DIDerivedType(tag: DW_TAG_member, name: "U", scope: !20, file: !1, line: 18, baseType: !19, size: 8)
!23 = !{!18}
!24 = !{!10, !11}
!25 = !{i32 2, !"CodeView", i32 1}
!26 = !{i32 2, !"Debug Info Version", i32 3}
!27 = !{i32 1, !"wchar_size", i32 2}
!28 = !{i32 7, !"PIC Level", i32 2}
!29 = !{!"clang version 8.0.0"}
!30 = distinct !DISubprogram(name: "Func_Enum", linkageName: "?Func_Enum@@YA?AW4Enum@@AEAW41@@Z", scope: !1, file: !1, line: 5, type: !31, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !17)
!31 = !DISubroutineType(types: !32)
!32 = !{!3, !33}
!33 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !3, size: 64)
!34 = !DILocalVariable(name: "arg", arg: 1, scope: !30, file: !1, line: 5, type: !33)
!35 = !DILocation(line: 5, scope: !30)
!36 = distinct !DISubprogram(name: "Func_EnumClass", linkageName: "?Func_EnumClass@@YA?AW4EnumClass@@AEAW41@@Z", scope: !1, file: !1, line: 8, type: !37, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !17)
!37 = !DISubroutineType(types: !38)
!38 = !{!8, !39}
!39 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !8, size: 64)
!40 = !DILocalVariable(name: "arg", arg: 1, scope: !36, file: !1, line: 8, type: !39)
!41 = !DILocation(line: 8, scope: !36)
!42 = !DILocalVariable(name: "SE", scope: !14, file: !1, line: 12, type: !13)
!43 = !DILocation(line: 12, scope: !14)
!44 = !DILocalVariable(name: "S", scope: !14, file: !1, line: 20, type: !20)
!45 = !DILocation(line: 20, scope: !14)
!46 = !DILocation(line: 21, scope: !14, isImplicitCode: true)
Reference in New Issue View Git Blame Copy Permalink