llvm-6502/test/Assembler/mdglobalvariable.ll
Duncan P. N. Exon Smith 9b18dbfe83 Optimize metadata node fields for CHECK-ability
While gaining practical experience hand-updating CHECK lines (for moving
the new debug info hierarchy into place),  I learnt a few things about
CHECK-ability of the specialized node assembly output.

  - The first part of a `CHECK:` is to identify the "right" node (this
    is especially true if you intend to use the new `CHECK-SAME`
    feature, since the first CHECK needs to identify the node correctly
    before you can split the line).
      - If there's a `tag:`, it should go first.
      - If there's a `name:`, it should go next (followed by the
        `linkageName:`, if any).
      - If there's a `scope:`, it should follow after that.
  - When a node type supports multiple DW_TAGs, but one is implied by
    its name and is overwhelmingly more common, the `tag:` field is
    terribly uninteresting unless it's different.
      - `MDBasicType` is almost always `DW_TAG_base_type`.
      - `MDTemplateValueParameter` is almost always
        `DW_TAG_template_value_parameter`.
  - Printing `name: ""` doesn't improve CHECK-ability, and there are far
    more nodes than I realized that are commonly nameless.
  - There are a few other fields that similarly aren't very interesting
    when they're empty.

This commit updates the `AsmWriter` as suggested above (and makes
necessary changes in `LLParser` for round-tripping).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230877 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-28 23:21:38 +00:00

23 lines
895 B
LLVM

; RUN: llvm-as < %s | llvm-dis | llvm-as | llvm-dis | FileCheck %s
; RUN: verify-uselistorder %s
@foo = global i32 0
; CHECK: !named = !{!0, !1, !2, !3, !4, !5, !6}
!named = !{!0, !1, !2, !3, !4, !5, !6}
!0 = distinct !{}
!1 = distinct !{}
!2 = !MDFile(filename: "path/to/file", directory: "/path/to/dir")
!3 = distinct !{}
!4 = distinct !{}
; CHECK: !5 = !MDGlobalVariable(name: "foo", linkageName: "foo", scope: !0, file: !2, line: 7, type: !3, isLocal: true, isDefinition: false, variable: i32* @foo, declaration: !4)
!5 = !MDGlobalVariable(name: "foo", linkageName: "foo", scope: !0,
file: !2, line: 7, type: !3, isLocal: true,
isDefinition: false, variable: i32* @foo,
declaration: !4)
; CHECK: !6 = !MDGlobalVariable(name: "bar", scope: null, isLocal: false, isDefinition: true)
!6 = !MDGlobalVariable(name: "bar")