fixup! don't error on incompatible flag

Author: Michael137

llvm/test/tools/llvm-dwarfdump/X86/filter-child-tag.yaml

@@ -54,9 +54,10 @@
 # FOO_MEM_WITH_PARENT-NOT: DW_TAG_structure_type
 # FOO_MEM_WITH_PARENT-NOT: DW_TAG_member
 
-# RUN: not llvm-dwarfdump %t.o --name=Foo -t DW_TAG_member 2>&1 | FileCheck %s --check-prefix=ERROR_NO_SHOW_CHILDREN
+## Not specifying --show-children ignores the --filter-child-tag option.
+# RUN: llvm-dwarfdump %t.o --name=Foo -t DW_TAG_member 2>&1 | FileCheck %s --check-prefix=NO_SHOW_CHILDREN
 
-# ERROR_NO_SHOW_CHILDREN: incompatible arguments: --filter-child-tag requires --show-children
+# NO_SHOW_CHILDREN: DW_TAG_structure_type
 
 --- !ELF
 FileHeader:

llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp

@@ -917,12 +917,6 @@ int main(int argc, char **argv) {
       Find.empty() && !FindAllApple)
     ShowChildren = true;
 
-  if (!ShowChildren && !FilterChildTag.empty()) {
-    WithColor::error() << "incompatible arguments: --filter-child-tag requires "
-                          "--show-children";
-    return 1;
-  }
-
   // Defaults to a.out if no filenames specified.
   if (InputFilenames.empty())
     InputFilenames.push_back("a.out");