200cc952a2
D63932 added a module flag to indicate that we are executing the regular LTO post merge pipeline, so that GlobalDCE could perform more aggressive optimization for Dead Virtual Function Elimination. This caused issues trying to reuse bitcode that had already been through the LTO pipeline (see context in D139816). Instead support this by passing down a parameter flag to the GlobalDCEPass constructor, which is the more usual way for indicating this information. Most test changes are to remove incidental uses of this flag. Of the 2 real uses, llvm/test/LTO/ARM/lto-linking-metadata.ll is now obsolete and removed in this patch, and the virtual-functions-visibility-post-lto.ll test is updated to use the regular LTO default pipeline where this parameter is set to true. Differential Revision: https://reviews.llvm.org/D153655
93 lines
4.7 KiB
LLVM
93 lines
4.7 KiB
LLVM
; RUN: llc %s -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o %t
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; RUN: llvm-dwarfdump -verify %t
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; RUN: llvm-dwarfdump -debug-info %t | FileCheck %s
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; RUN: rm %t
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;
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;$ cat -n 1.cpp
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; 1 struct HHH;
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; 2 HHH *zzz;
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;
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;$ cat -n 2.cpp
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; 1 void __attribute__((optnone)) __attribute__((nodebug)) f1() { }
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; 2
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; 3 struct HHH {
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; 4 template <typename bbb>
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; 5 static int __attribute__((always_inline)) ccc() {
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; 6 f1();
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; 7 }
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; 8 };
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; 9
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; 10 int main() {
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; 11 struct local { };
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; 12 HHH::ccc<local>();
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; 13 }
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;
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; $ clang -flto -O2 -g 1.cpp 2.cpp -o a.out
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;
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; Given this input, LLVM attempts to create a DIE for subprogram "main" in the
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; wrong context. The definition of struct "HHH" is placed in the CU for 1.cpp.
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; While creating the template instance in "HHH", function "ccc" is referenced
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; via the struct local type, and "main" is created in the CU for 1.cpp, which
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; is incorrect.
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;
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; See PR48790 for more discussion and original compile commands.
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;
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; Check that there are no verifier failures, and that the SP for "main" appears
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; in the correct CU.
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; CHECK-LABEL: DW_TAG_compile_unit
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; CHECK: DW_AT_name ("1.cpp")
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; CHECK-NOT: DW_AT_name ("main")
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; CHECK-LABEL: DW_TAG_compile_unit
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; CHECK: DW_AT_name ("2.cpp")
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; CHECK: DW_TAG_subprogram
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; CHECK: DW_AT_name ("main")
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source_filename = "ld-temp.o"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: noinline norecurse nounwind optnone uwtable mustprogress
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define internal fastcc void @_Z2f1v() unnamed_addr {
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entry:
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ret void
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}
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; Function Attrs: norecurse noreturn nounwind uwtable mustprogress
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define dso_local i32 @main() local_unnamed_addr !dbg !17 {
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entry:
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tail call fastcc void @_Z2f1v(), !dbg !21
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unreachable, !dbg !21
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}
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!llvm.dbg.cu = !{!0, !9}
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!llvm.ident = !{!10, !10}
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!llvm.module.flags = !{!11, !12, !13, !14, !15}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 12.0.0 (git@github.com:llvm/llvm-project bc9ab9a5cd6bafc5e1293f3d5d51638f8f5cd26c)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "1.cpp", directory: "/tmp/bees")
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!2 = !{}
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!3 = !{!4}
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!4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
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!5 = distinct !DIGlobalVariable(name: "zzz", scope: !0, file: !1, line: 2, type: !6, isLocal: false, isDefinition: true)
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!6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64)
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!7 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "HHH", file: !8, line: 3, size: 8, flags: DIFlagTypePassByValue, elements: !2, identifier: "_ZTS3HHH")
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!8 = !DIFile(filename: "2.cpp", directory: "/tmp/bees")
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!9 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !8, producer: "clang version 12.0.0 (git@github.com:llvm/llvm-project bc9ab9a5cd6bafc5e1293f3d5d51638f8f5cd26c)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!10 = !{!"clang version 12.0.0 (git@github.com:llvm/llvm-project bc9ab9a5cd6bafc5e1293f3d5d51638f8f5cd26c)"}
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!11 = !{i32 7, !"Dwarf Version", i32 4}
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!12 = !{i32 2, !"Debug Info Version", i32 3}
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!13 = !{i32 1, !"wchar_size", i32 4}
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!14 = !{i32 1, !"ThinLTO", i32 0}
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!15 = !{i32 1, !"EnableSplitLTOUnit", i32 1}
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!17 = distinct !DISubprogram(name: "main", scope: !8, file: !8, line: 10, type: !18, scopeLine: 10, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !9, retainedNodes: !2)
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!18 = !DISubroutineType(types: !19)
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!19 = !{!20}
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!20 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!21 = !DILocation(line: 6, column: 5, scope: !22, inlinedAt: !27)
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!22 = distinct !DISubprogram(name: "ccc<local>", linkageName: "_ZN3HHH3cccIZ4mainE5localEEiv", scope: !7, file: !8, line: 5, type: !18, scopeLine: 5, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !9, templateParams: !24, declaration: !23, retainedNodes: !2)
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!23 = !DISubprogram(name: "ccc<local>", linkageName: "_ZN3HHH3cccIZ4mainE5localEEiv", scope: !7, file: !8, line: 5, type: !18, scopeLine: 5, flags: DIFlagPrototyped | DIFlagStaticMember, spFlags: DISPFlagOptimized, templateParams: !24)
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!24 = !{!25}
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!25 = !DITemplateTypeParameter(name: "bbb", type: !26)
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!26 = !DICompositeType(tag: DW_TAG_structure_type, name: "local", scope: !17, file: !8, line: 11, size: 8, flags: DIFlagFwdDecl)
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!27 = distinct !DILocation(line: 12, column: 3, scope: !17)
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