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/DebugInfo/X86/float_const.ll b/llvm/test/DebugInfo/X86/float_const.ll
index 6e99ffcc1f2..982aaa3a3a4 100644
--- a/llvm/test/DebugInfo/X86/float_const.ll
+++ b/llvm/test/DebugInfo/X86/float_const.ll
@@ -44,7 +44,7 @@ attributes #1 = { nounwind readnone }
 !10 = !DISubroutineType(types: !11)
 !11 = !{null}
 !12 = !{!13}
-!13 = !DILocalVariable(tag: DW_TAG_auto_variable, name: "a", line: 2, scope: !7, file: !9, type: !14)
+!13 = !DILocalVariable(name: "a", line: 2, scope: !7, file: !9, type: !14)
 !14 = !DIBasicType(tag: DW_TAG_base_type, name: "float", size: 32, align: 32, encoding: DW_ATE_float)
 !15 = !{i32 2, !"Dwarf Version", i32 2}
 !16 = !{i32 2, !"Debug Info Version", i32 3}