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, 2 insertions, 2 deletions

diff --git a/llvm/test/CodeGen/X86/misched-code-difference-with-debug.ll b/llvm/test/CodeGen/X86/misched-code-difference-with-debug.ll
index 0f1f382c49a..d0aebad1560 100644
--- a/llvm/test/CodeGen/X86/misched-code-difference-with-debug.ll
+++ b/llvm/test/CodeGen/X86/misched-code-difference-with-debug.ll
@@ -80,8 +80,8 @@ declare void @llvm.dbg.value(metadata, i64, metadata, metadata)
 !15 = !DISubroutineType(types: !16)
 !16 = !{null}
 !17 = !{!18, !19}
-!18 = !DILocalVariable(tag: DW_TAG_auto_variable, name: "c", line: 7, scope: !13, file: !14, type: !"_ZTS1C")
-!19 = !DILocalVariable(tag: DW_TAG_auto_variable, name: "lc", line: 8, scope: !13, file: !14, type: !11)
+!18 = !DILocalVariable(name: "c", line: 7, scope: !13, file: !14, type: !"_ZTS1C")
+!19 = !DILocalVariable(name: "lc", line: 8, scope: !13, file: !14, type: !11)
 !20 = !{!21}
 !21 = !DIGlobalVariable(name: "argc", line: 1, isLocal: false, isDefinition: true, scope: null, file: !14, type: !11, variable: i8* @argc)
 !22 = !{i32 2, !"Dwarf Version", i32 4}