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https://github.com/c64scene-ar/llvm-6502.git
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e0e66b9dfa
The current version of StripDeadDebugInfo became stale and no longer actually worked since it was expecting an older version of debug info. This patch updates it to use DebugInfoFinder and the modern DebugInfo classes as much as possible to make it more redundent to such changes. Additionally, the only place where that was avoided (the code where we replace the old sets with the new), I call verify on the DIContextUnit implying that if the format changes and my live set changes no longer make sense an assert will be hit. In order to ensure that that occurs I have included a test case. The actual stripping of the dead debug info follows the same strategy as was used before in this class: find the live set and replace the old set in the given compile unit (which may contain dead global variables/functions) with the new live one. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189078 91177308-0d34-0410-b5e6-96231b3b80d8
56 lines
3.8 KiB
LLVM
56 lines
3.8 KiB
LLVM
; RUN: opt -strip-dead-debug-info -verify %s -S | FileCheck %s
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; CHECK-NOT: bar
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; CHECK-NOT: abcd
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@xyz = global i32 2
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata) #0
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; Function Attrs: nounwind readnone ssp
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define i32 @fn() #1 {
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entry:
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ret i32 0, !dbg !18
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}
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; Function Attrs: nounwind readonly ssp
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define i32 @foo(i32 %i) #2 {
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entry:
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tail call void @llvm.dbg.value(metadata !{i32 %i}, i64 0, metadata !15), !dbg !20
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%.0 = load i32* @xyz, align 4
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ret i32 %.0, !dbg !21
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}
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attributes #0 = { nounwind readnone }
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attributes #1 = { nounwind readnone ssp }
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attributes #2 = { nounwind readonly ssp }
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!llvm.dbg.cu = !{!0}
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!0 = metadata !{i32 524305, metadata !1, i32 1, metadata !"4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", i1 true, metadata !"", i32 0, metadata !2, metadata !2, metadata !23, metadata !24, null, metadata !""} ; [ DW_TAG_compile_unit ] [/tmp//g.c] [DW_LANG_C89]
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!1 = metadata !{metadata !"g.c", metadata !"/tmp/"}
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!2 = metadata !{null}
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!3 = metadata !{i32 524334, metadata !1, null, metadata !"bar", metadata !"bar", metadata !"", i32 5, metadata !4, i1 true, i1 true, i32 0, i32 0, null, i1 false, i1 true, null, null, null, null, i32 0} ; [ DW_TAG_subprogram ] [line 5] [local] [def] [scope 0] [bar]
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!4 = metadata !{i32 524309, metadata !1, metadata !5, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !2, i32 0, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!5 = metadata !{i32 524329, metadata !1} ; [ DW_TAG_file_type ] [/tmp//g.c]
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!6 = metadata !{i32 524334, metadata !1, null, metadata !"fn", metadata !"fn", metadata !"fn", i32 6, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i1 false, i1 true, i32 ()* @fn, null, null, null, i32 0} ; [ DW_TAG_subprogram ] [line 6] [def] [scope 0] [fn]
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!7 = metadata !{i32 524309, metadata !1, metadata !5, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!8 = metadata !{metadata !9}
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!9 = metadata !{i32 524324, metadata !1, metadata !5, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
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!10 = metadata !{i32 524334, metadata !1, null, metadata !"foo", metadata !"foo", metadata !"foo", i32 7, metadata !11, i1 false, i1 true, i32 0, i32 0, null, i1 false, i1 true, i32 (i32)* @foo, null, null, null, i32 0} ; [ DW_TAG_subprogram ] [line 7] [def] [scope 0] [foo]
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!11 = metadata !{i32 524309, metadata !1, metadata !5, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !12, i32 0, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!12 = metadata !{metadata !9, metadata !9}
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!13 = metadata !{i32 524544, metadata !14, metadata !"bb", metadata !5, i32 5, metadata !9}
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!14 = metadata !{i32 524299, metadata !1, metadata !3, i32 5, i32 0, i32 0} ; [ DW_TAG_lexical_block ] [/tmp//g.c]
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!15 = metadata !{i32 524545, metadata !10, metadata !"i", metadata !5, i32 7, metadata !9}
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!16 = metadata !{i32 524340, i32 0, metadata !5, metadata !"abcd", metadata !"abcd", metadata !"", metadata !5, i32 2, metadata !9, i1 true, i1 true, null, null}
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!17 = metadata !{i32 524340, i32 0, metadata !5, metadata !"xyz", metadata !"xyz", metadata !"", metadata !5, i32 3, metadata !9, i1 false, i1 true, i32* @xyz, null}
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!18 = metadata !{i32 6, i32 0, metadata !19, null}
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!19 = metadata !{i32 524299, metadata !1, metadata !6, i32 6, i32 0, i32 0} ; [ DW_TAG_lexical_block ] [/tmp//g.c]
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!20 = metadata !{i32 7, i32 0, metadata !10, null}
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!21 = metadata !{i32 10, i32 0, metadata !22, null}
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!22 = metadata !{i32 524299, metadata !1, metadata !10, i32 7, i32 0, i32 0} ; [ DW_TAG_lexical_block ] [/tmp//g.c]
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!23 = metadata !{metadata !3, metadata !6, metadata !10}
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!24 = metadata !{metadata !16, metadata !17}
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