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llvm-project/llvm/test/Linker/debug-info-global-var.ll

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Linker: Remove unnecessary call to copyMetadata in IRLinker::linkGlobalVariable. This was causing us to create duplicate metadata on global variables. Debug info test case by Adrian Prantl, additional test cases by me. Fixes PR31012. Differential Revision: https://reviews.llvm.org/D26622 llvm-svn: 286905
2016-11-15 07:18:38 +08:00
; RUN: llvm-link -S %s %S/debug-info-version-a.ll | FileCheck %s
source_filename = "debug-info-global-var.c"
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.12.0"
; CHECK: @g = global i32 0, align 4, !dbg ![[G:[0-9]+]]{{$}}
@g = global i32 0, align 4, !dbg !0
!llvm.dbg.cu = !{!1}
!llvm.module.flags = !{!6, !7, !8}
!llvm.ident = !{!9}
Canonicalize the representation of empty an expression in DIGlobalVariableExpression This change simplifies code that has to deal with DIGlobalVariableExpression and mirrors how we treat DIExpressions in debug info intrinsics. Before this change there were two ways of representing empty expressions on globals, a nullptr and an empty !DIExpression(). If someone needs to upgrade out-of-tree testcases: perl -pi -e 's/(!DIGlobalVariableExpression\(var: ![0-9]*)\)/\1, expr: !DIExpression())/g' <MYTEST.ll> will catch 95%. llvm-svn: 312144
2017-08-31 02:06:51 +08:00
; CHECK: ![[G]] = !DIGlobalVariableExpression(var: ![[GVAR:.*]], expr: !DIExpression())
[IR] Remove the DIExpression field from DIGlobalVariable. This patch implements PR31013 by introducing a DIGlobalVariableExpression that holds a pair of DIGlobalVariable and DIExpression. Currently, DIGlobalVariables holds a DIExpression. This is not the best way to model this: (1) The DIGlobalVariable should describe the source level variable, not how to get to its location. (2) It makes it unsafe/hard to update the expressions when we call replaceExpression on the DIGLobalVariable. (3) It makes it impossible to represent a global variable that is in more than one location (e.g., a variable with multiple DW_OP_LLVM_fragment-s). We also moved away from attaching the DIExpression to DILocalVariable for the same reasons. This reapplies r289902 with additional testcase upgrades and a change to the Bitcode record for DIGlobalVariable, that makes upgrading the old format unambiguous also for variables without DIExpressions. <rdar://problem/29250149> https://llvm.org/bugs/show_bug.cgi?id=31013 Differential Revision: https://reviews.llvm.org/D26769 llvm-svn: 290153
2016-12-20 10:09:43 +08:00
; CHECK: ![[GVAR]] = distinct !DIGlobalVariable(name: "g"
Canonicalize the representation of empty an expression in DIGlobalVariableExpression This change simplifies code that has to deal with DIGlobalVariableExpression and mirrors how we treat DIExpressions in debug info intrinsics. Before this change there were two ways of representing empty expressions on globals, a nullptr and an empty !DIExpression(). If someone needs to upgrade out-of-tree testcases: perl -pi -e 's/(!DIGlobalVariableExpression\(var: ![0-9]*)\)/\1, expr: !DIExpression())/g' <MYTEST.ll> will catch 95%. llvm-svn: 312144
2017-08-31 02:06:51 +08:00
!0 = !DIGlobalVariableExpression(var: !10, expr: !DIExpression())
Linker: Remove unnecessary call to copyMetadata in IRLinker::linkGlobalVariable. This was causing us to create duplicate metadata on global variables. Debug info test case by Adrian Prantl, additional test cases by me. Fixes PR31012. Differential Revision: https://reviews.llvm.org/D26622 llvm-svn: 286905
2016-11-15 07:18:38 +08:00
!1 = distinct !DICompileUnit(language: DW_LANG_C99, file: !2, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !3, globals: !4)
!2 = !DIFile(filename: "debug-info-global-var.c", directory: "/")
!3 = !{}
!4 = !{!0}
!5 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!6 = !{i32 2, !"Dwarf Version", i32 4}
!7 = !{i32 2, !"Debug Info Version", i32 3}
!8 = !{i32 1, !"PIC Level", i32 2}
!9 = !{!"clang version 4.0.0 (trunk 286129) (llvm/trunk 286128)"}
[IR] Remove the DIExpression field from DIGlobalVariable. This patch implements PR31013 by introducing a DIGlobalVariableExpression that holds a pair of DIGlobalVariable and DIExpression. Currently, DIGlobalVariables holds a DIExpression. This is not the best way to model this: (1) The DIGlobalVariable should describe the source level variable, not how to get to its location. (2) It makes it unsafe/hard to update the expressions when we call replaceExpression on the DIGLobalVariable. (3) It makes it impossible to represent a global variable that is in more than one location (e.g., a variable with multiple DW_OP_LLVM_fragment-s). We also moved away from attaching the DIExpression to DILocalVariable for the same reasons. This reapplies r289902 with additional testcase upgrades and a change to the Bitcode record for DIGlobalVariable, that makes upgrading the old format unambiguous also for variables without DIExpressions. <rdar://problem/29250149> https://llvm.org/bugs/show_bug.cgi?id=31013 Differential Revision: https://reviews.llvm.org/D26769 llvm-svn: 290153
2016-12-20 10:09:43 +08:00
!10 = distinct !DIGlobalVariable(name: "g", scope: !1, file: !2, line: 1, type: !5, isLocal: false, isDefinition: true)