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llvm-project/llvm/test/CodeGen/X86/dbg-at-specficiation.ll

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Do not unnecessarily use AT_specification DIE because it does not add any value. Few weeks ago, llvm completely inverted the debug info graph. Earlier each debug info node used to keep track of its compile unit, now compile unit keeps track of important nodes. One impact of this change is that the global variable's do not have any context, which should be checked before deciding to use AT_specification DIE. llvm-svn: 140282
2011-09-22 07:41:11 +08:00
; RUN: llc < %s | FileCheck %s
; Radar 10147769
; Do not unnecessarily use AT_specification DIE.
; CHECK-NOT: AT_specification
@a = common global [10 x i32] zeroinitializer, align 16
!llvm.dbg.cu = !{!0}
!0 = metadata !{i32 720913, i32 0, i32 12, metadata !"x.c", metadata !"/private/tmp", metadata !"clang version 3.0 (trunk 140253)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ]
!1 = metadata !{metadata !2}
!2 = metadata !{i32 0}
!3 = metadata !{metadata !4}
!4 = metadata !{metadata !5}
!5 = metadata !{i32 720948, i32 0, null, metadata !"a", metadata !"a", metadata !"", metadata !6, i32 1, metadata !7, i32 0, i32 1, [10 x i32]* @a} ; [ DW_TAG_variable ]
!6 = metadata !{i32 720937, metadata !"x.c", metadata !"/private/tmp", null} ; [ DW_TAG_file_type ]
!7 = metadata !{i32 720897, null, metadata !"", null, i32 0, i64 320, i64 32, i32 0, i32 0, metadata !8, metadata !9, i32 0, i32 0} ; [ DW_TAG_array_type ]
!8 = metadata !{i32 720932, null, metadata !"int", null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
!9 = metadata !{metadata !10}
Use the 'count' attribute to calculate the upper bound of an array. The count attribute is more accurate with regards to the size of an array. It also obviates the upper bound attribute in the subrange. We can also better handle an unbound array by setting the count to -1 instead of the lower bound to 1 and upper bound to 0. llvm-svn: 169312
2012-12-05 05:34:03 +08:00
!10 = metadata !{i32 720929, i64 0, i64 10} ; [ DW_TAG_subrange_type ]