Make the default triple optional by allowing an empty string

When building LLVM as a (potentially dynamic) library that can be linked against
by multiple compilers, the default triple is not really meaningful.
We allow to explicitely set it to an empty string when configuring LLVM.
In this case, said "target independent" tests in the test suite that are using
the default triple are disabled by matching the newly available feature
"default_triple".

Reviewers: probinson, echristo
Differential Revision: http://reviews.llvm.org/D12660

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 247775

1 files changed, 154 insertions, 0 deletions

diff --git a/llvm/test/DebugInfo/Generic/inheritance.ll b/llvm/test/DebugInfo/Generic/inheritance.ll
new file mode 100644
index 00000000000..802c4f195d4
--- /dev/null
+++ b/llvm/test/DebugInfo/Generic/inheritance.ll
@@ -0,0 +1,154 @@
+; RUN: llc %s -o /dev/null
+; PR 2613.
+
+%struct.__class_type_info_pseudo = type { %struct.__type_info_pseudo }
+%struct.__type_info_pseudo = type { i8*, i8* }
+%struct.test1 = type { i32 (...)** }
+
+@_ZTV5test1 = weak_odr constant [4 x i32 (...)*] [i32 (...)* null, i32 (...)* bitcast (%struct.__class_type_info_pseudo* @_ZTI5test1 to i32 (...)*), i32 (...)* bitcast (void (%struct.test1*)* @_ZN5test1D1Ev to i32 (...)*), i32 (...)* bitcast (void (%struct.test1*)* @_ZN5test1D0Ev to i32 (...)*)], align 32 ; <[4 x i32 (...)*]*> [#uses=1]
+@_ZTI5test1 = weak_odr constant %struct.__class_type_info_pseudo { %struct.__type_info_pseudo { i8* inttoptr (i64 add (i64 ptrtoint ([0 x i32 (...)*]* @_ZTVN10__cxxabiv117__class_type_infoE to i64), i64 16) to i8*), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @_ZTS5test1, i64 0, i64 0) } }, align 16 ; <%struct.__class_type_info_pseudo*> [#uses=1]
+@_ZTVN10__cxxabiv117__class_type_infoE = external constant [0 x i32 (...)*] ; <[0 x i32 (...)*]*> [#uses=1]
+@_ZTS5test1 = weak_odr constant [7 x i8] c"5test1\00" ; <[7 x i8]*> [#uses=2]
+
+define i32 @main() nounwind ssp {
+entry:
+  %retval = alloca i32                            ; <i32*> [#uses=2]
+  %0 = alloca i32                                 ; <i32*> [#uses=2]
+  %tst = alloca %struct.test1                     ; <%struct.test1*> [#uses=1]
+  %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+  call void @llvm.dbg.declare(metadata %struct.test1* %tst, metadata !0, metadata !DIExpression()), !dbg !21
+  call void @_ZN5test1C1Ev(%struct.test1* %tst) nounwind, !dbg !22
+  store i32 0, i32* %0, align 4, !dbg !23
+  %1 = load i32, i32* %0, align 4, !dbg !23            ; <i32> [#uses=1]
+  store i32 %1, i32* %retval, align 4, !dbg !23
+  br label %return, !dbg !23
+
+return:                                           ; preds = %entry
+  %retval1 = load i32, i32* %retval, !dbg !23          ; <i32> [#uses=1]
+  ret i32 %retval1, !dbg !23
+}
+
+define linkonce_odr void @_ZN5test1C1Ev(%struct.test1* %this) nounwind ssp align 2 {
+entry:
+  %this_addr = alloca %struct.test1*              ; <%struct.test1**> [#uses=2]
+  %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+  call void @llvm.dbg.declare(metadata %struct.test1** %this_addr, metadata !24, metadata !DIExpression()), !dbg !28
+  store %struct.test1* %this, %struct.test1** %this_addr
+  %0 = load %struct.test1*, %struct.test1** %this_addr, align 8, !dbg !28 ; <%struct.test1*> [#uses=1]
+  %1 = getelementptr inbounds %struct.test1, %struct.test1* %0, i32 0, i32 0, !dbg !28 ; <i32 (...)***> [#uses=1]
+  store i32 (...)** getelementptr inbounds ([4 x i32 (...)*], [4 x i32 (...)*]* @_ZTV5test1, i64 0, i64 2), i32 (...)*** %1, align 8, !dbg !28
+  br label %return, !dbg !28
+
+return:                                           ; preds = %entry
+  ret void, !dbg !29
+}
+
+declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
+
+define linkonce_odr void @_ZN5test1D1Ev(%struct.test1* %this) nounwind ssp align 2 {
+entry:
+  %this_addr = alloca %struct.test1*              ; <%struct.test1**> [#uses=3]
+  %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+  call void @llvm.dbg.declare(metadata %struct.test1** %this_addr, metadata !32, metadata !DIExpression()), !dbg !34
+  store %struct.test1* %this, %struct.test1** %this_addr
+  %0 = load %struct.test1*, %struct.test1** %this_addr, align 8, !dbg !35 ; <%struct.test1*> [#uses=1]
+  %1 = getelementptr inbounds %struct.test1, %struct.test1* %0, i32 0, i32 0, !dbg !35 ; <i32 (...)***> [#uses=1]
+  store i32 (...)** getelementptr inbounds ([4 x i32 (...)*], [4 x i32 (...)*]* @_ZTV5test1, i64 0, i64 2), i32 (...)*** %1, align 8, !dbg !35
+  br label %bb, !dbg !37
+
+bb:                                               ; preds = %entry
+  %2 = trunc i32 0 to i8, !dbg !37                ; <i8> [#uses=1]
+  %toBool = icmp ne i8 %2, 0, !dbg !37            ; <i1> [#uses=1]
+  br i1 %toBool, label %bb1, label %bb2, !dbg !37
+
+bb1:                                              ; preds = %bb
+  %3 = load %struct.test1*, %struct.test1** %this_addr, align 8, !dbg !37 ; <%struct.test1*> [#uses=1]
+  %4 = bitcast %struct.test1* %3 to i8*, !dbg !37 ; <i8*> [#uses=1]
+  call void @_ZdlPv(i8* %4) nounwind, !dbg !37
+  br label %bb2, !dbg !37
+
+bb2:                                              ; preds = %bb1, %bb
+  br label %return, !dbg !37
+
+return:                                           ; preds = %bb2
+  ret void, !dbg !37
+}
+
+define linkonce_odr void @_ZN5test1D0Ev(%struct.test1* %this) nounwind ssp align 2 {
+entry:
+  %this_addr = alloca %struct.test1*              ; <%struct.test1**> [#uses=3]
+  %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+  call void @llvm.dbg.declare(metadata %struct.test1** %this_addr, metadata !38, metadata !DIExpression()), !dbg !40
+  store %struct.test1* %this, %struct.test1** %this_addr
+  %0 = load %struct.test1*, %struct.test1** %this_addr, align 8, !dbg !41 ; <%struct.test1*> [#uses=1]
+  %1 = getelementptr inbounds %struct.test1, %struct.test1* %0, i32 0, i32 0, !dbg !41 ; <i32 (...)***> [#uses=1]
+  store i32 (...)** getelementptr inbounds ([4 x i32 (...)*], [4 x i32 (...)*]* @_ZTV5test1, i64 0, i64 2), i32 (...)*** %1, align 8, !dbg !41
+  br label %bb, !dbg !43
+
+bb:                                               ; preds = %entry
+  %2 = trunc i32 1 to i8, !dbg !43                ; <i8> [#uses=1]
+  %toBool = icmp ne i8 %2, 0, !dbg !43            ; <i1> [#uses=1]
+  br i1 %toBool, label %bb1, label %bb2, !dbg !43
+
+bb1:                                              ; preds = %bb
+  %3 = load %struct.test1*, %struct.test1** %this_addr, align 8, !dbg !43 ; <%struct.test1*> [#uses=1]
+  %4 = bitcast %struct.test1* %3 to i8*, !dbg !43 ; <i8*> [#uses=1]
+  call void @_ZdlPv(i8* %4) nounwind, !dbg !43
+  br label %bb2, !dbg !43
+
+bb2:                                              ; preds = %bb1, %bb
+  br label %return, !dbg !43
+
+return:                                           ; preds = %bb2
+  ret void, !dbg !43
+}
+
+declare void @_ZdlPv(i8*) nounwind
+
+!0 = !DILocalVariable(name: "tst", line: 13, scope: !1, file: !4, type: !8)
+!1 = distinct !DILexicalBlock(line: 0, column: 0, file: !44, scope: !2)
+!2 = distinct !DILexicalBlock(line: 0, column: 0, file: !44, scope: !3)
+!3 = distinct !DISubprogram(name: "main", linkageName: "main", line: 11, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, scope: !4, type: !5)
+!4 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", isOptimized: true, emissionKind: 0, file: !44, enums: !45, retainedTypes: !45)
+!5 = !DISubroutineType(types: !6)
+!6 = !{!7}
+!7 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+!8 = !DICompositeType(tag: DW_TAG_structure_type, name: "test1", line: 1, size: 64, align: 64, file: !44, scope: !4, elements: !9, vtableHolder: !8)
+!9 = !{!10, !14, !18}
+!10 = !DIDerivedType(tag: DW_TAG_member, name: "_vptr$test1", line: 1, size: 64, align: 64, file: !44, scope: !8, baseType: !11)
+!11 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, file: !4, baseType: !12)
+!12 = !DIDerivedType(tag: DW_TAG_pointer_type, name: "__vtbl_ptr_type", scope: !4, baseType: !5)
+!13 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", isOptimized: false, emissionKind: 0, file: !46, enums: !45, retainedTypes: !45)
+!14 = !DISubprogram(name: "test1", line: 1, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrivate, isOptimized: false, scope: !8, type: !15)
+!15 = !DISubroutineType(types: !16)
+!16 = !{null, !17}
+!17 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial, file: !4, baseType: !8)
+!18 = !DISubprogram(name: "~test1", line: 4, isLocal: false, isDefinition: false, virtuality: DW_VIRTUALITY_virtual, virtualIndex: 6, isOptimized: false, scope: !8, type: !19, containingType: !8)
+!19 = !DISubroutineType(types: !20)
+!20 = !{null, !17, !7}
+!21 = !DILocation(line: 11, scope: !1)
+!22 = !DILocation(line: 13, scope: !1)
+!23 = !DILocation(line: 14, scope: !1)
+!24 = !DILocalVariable(name: "this", line: 13, arg: 1, scope: !25, file: !4, type: !26)
+!25 = distinct !DISubprogram(name: "test1", linkageName: "_ZN5test1C1Ev", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, scope: !4, type: !15)
+!26 = !DIDerivedType(tag: DW_TAG_const_type, size: 64, align: 64, flags: DIFlagArtificial, file: !4, baseType: !27)
+!27 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, file: !4, baseType: !8)
+!28 = !DILocation(line: 1, scope: !25)
+!29 = !DILocation(line: 1, scope: !30)
+!30 = distinct !DILexicalBlock(line: 0, column: 0, file: !44, scope: !31)
+!31 = distinct !DILexicalBlock(line: 0, column: 0, file: !44, scope: !25)
+!32 = !DILocalVariable(name: "this", line: 4, arg: 1, scope: !33, file: !4, type: !26)
+!33 = distinct !DISubprogram(name: "~test1", linkageName: "_ZN5test1D1Ev", line: 4, isLocal: false, isDefinition: true, virtuality: DW_VIRTUALITY_virtual, virtualIndex: 6, isOptimized: false, scope: !8, type: !15, containingType: !8)
+!34 = !DILocation(line: 4, scope: !33)
+!35 = !DILocation(line: 5, scope: !36)
+!36 = distinct !DILexicalBlock(line: 0, column: 0, file: !44, scope: !33)
+!37 = !DILocation(line: 6, scope: !36)
+!38 = !DILocalVariable(name: "this", line: 4, arg: 1, scope: !39, file: !4, type: !26)
+!39 = distinct !DISubprogram(name: "~test1", linkageName: "_ZN5test1D0Ev", line: 4, isLocal: false, isDefinition: true, virtuality: DW_VIRTUALITY_virtual, virtualIndex: 6, isOptimized: false, scope: !8, type: !15, containingType: !8)
+!40 = !DILocation(line: 4, scope: !39)
+!41 = !DILocation(line: 5, scope: !42)
+!42 = distinct !DILexicalBlock(line: 0, column: 0, file: !44, scope: !39)
+!43 = !DILocation(line: 6, scope: !42)
+!44 = !DIFile(filename: "inheritance.cpp", directory: "/tmp/")
+!45 = !{i32 0}
+!46 = !DIFile(filename: "<built-in>", directory: "/tmp/")