DI: Remove DW_TAG_arg_variable and DW_TAG_auto_variable

Remove the fake `DW_TAG_auto_variable` and `DW_TAG_arg_variable` tags,
using `DW_TAG_variable` in their place Stop exposing the `tag:` field at
all in the assembly format for `DILocalVariable`.

Most of the testcase updates were generated by the following sed script:

    find test/ -name "*.ll" -o -name "*.mir" |
    xargs grep -l 'DILocalVariable' |
    xargs sed -i '' \
      -e 's/tag: DW_TAG_arg_variable, //' \
      -e 's/tag: DW_TAG_auto_variable, //'

There were only a handful of tests in `test/Assembly` that I needed to
update by hand.

(Note: a follow-up could change `DILocalVariable::DILocalVariable()` to
set the tag to `DW_TAG_formal_parameter` instead of `DW_TAG_variable`
(as appropriate), instead of having that logic magically in the backend
in `DbgVariable`.  I've added a FIXME to that effect.)

llvm-svn: 243774

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/test/Instrumentation/SanitizerCoverage/coverage-dbg.ll b/llvm/test/Instrumentation/SanitizerCoverage/coverage-dbg.ll
index 45b4c8cb0a6..f607c3a23db 100644
--- a/llvm/test/Instrumentation/SanitizerCoverage/coverage-dbg.ll
+++ b/llvm/test/Instrumentation/SanitizerCoverage/coverage-dbg.ll
@@ -58,7 +58,7 @@ attributes #1 = { nounwind readnone }
 !12 = !{!13}
 !13 = !DISubprogram(name: "f", linkageName: "_ZN1A1fEv", line: 6, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 6, file: !1, scope: !"_ZTS1A", type: !9, function: i32 (%struct.A*)* @_ZN1A1fEv, declaration: !8, variables: !14)
 !14 = !{!15}
-!15 = !DILocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !13, type: !16)
+!15 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !13, type: !16)
 !16 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !"_ZTS1A")
 !17 = !{i32 2, !"Dwarf Version", i32 4}
 !18 = !{i32 2, !"Debug Info Version", i32 3}