Reapply "DWARFVerifier: Check "completeness" of .debug_names section"

This is a resubmit of r331868 (D46583), which was reverted due to
failures on the PS4 bot.

These have been resolved with r332246/D46748.

llvm-svn: 332349
diff --git a/llvm/test/tools/llvm-dwarfdump/X86/debug-names-verify-completeness.s b/llvm/test/tools/llvm-dwarfdump/X86/debug-names-verify-completeness.s
new file mode 100644
index 0000000..359dce9
--- /dev/null
+++ b/llvm/test/tools/llvm-dwarfdump/X86/debug-names-verify-completeness.s
@@ -0,0 +1,195 @@
+# RUN: llvm-mc -triple x86_64-pc-linux %s -filetype=obj -o - | not llvm-dwarfdump -verify - | FileCheck %s
+
+# CHECK: error: Name Index @ 0x0: Entry for DIE @ 0x10 (DW_TAG_namespace) with name namesp missing.
+# CHECK: error: Name Index @ 0x0: Entry for DIE @ 0x15 (DW_TAG_variable) with name var_block_addr missing.
+# CHECK: error: Name Index @ 0x0: Entry for DIE @ 0x25 (DW_TAG_namespace) with name (anonymous namespace) missing.
+# CHECK: error: Name Index @ 0x0: Entry for DIE @ 0x26 (DW_TAG_variable) with name var_loc_addr missing.
+# CHECK: error: Name Index @ 0x0: Entry for DIE @ 0x30 (DW_TAG_variable) with name var_loc_tls missing.
+# CHECK: error: Name Index @ 0x0: Entry for DIE @ 0x37 (DW_TAG_variable) with name var_loc_gnu_tls missing.
+# CHECK: error: Name Index @ 0x0: Entry for DIE @ 0x3e (DW_TAG_subprogram) with name fun_name missing.
+# CHECK: error: Name Index @ 0x0: Entry for DIE @ 0x3e (DW_TAG_subprogram) with name _Z8fun_name missing.
+# CHECK: error: Name Index @ 0x0: Entry for DIE @ 0x4f (DW_TAG_inlined_subroutine) with name fun_inline missing.
+# CHECK: error: Name Index @ 0x0: Entry for DIE @ 0x64 (DW_TAG_label) with name label missing.
+
+	.section	.debug_str,"MS",@progbits,1
+.Linfo_producer:
+	.asciz	"hand-written DWARF"
+.Lname_var_block_addr:
+	.asciz	"var_block_addr"
+.Lname_var_loc_addr:
+	.asciz	"var_loc_addr"
+.Lname_var_loc_tls:
+	.asciz	"var_loc_tls"
+.Lname_var_loc_gnu_tls:
+	.asciz	"var_loc_gnu_tls"
+.Lname_fun_name:
+	.asciz	"fun_name"
+.Lname_fun_link_name:
+	.asciz	"_Z8fun_name"
+.Lname_fun_inline:
+	.asciz	"fun_inline"
+.Lnamespace:
+	.asciz	"namesp"
+.Lname_label:
+	.asciz	"label"
+
+	.section	.debug_loc,"",@progbits
+.Ldebug_loc0:
+	.quad	0
+	.quad	1
+	.short	.Lloc0_end-.Lloc0_start # Loc expr size
+.Lloc0_start:
+	.byte	3                       # DW_OP_addr
+        .quad 0x47
+.Lloc0_end:
+	.quad	0
+	.quad	0
+
+	.section	.debug_abbrev,"",@progbits
+	.byte	1                       # Abbreviation Code
+	.byte	17                      # DW_TAG_compile_unit
+	.byte	1                       # DW_CHILDREN_yes
+	.byte	37                      # DW_AT_producer
+	.byte	14                      # DW_FORM_strp
+	.byte	0                       # EOM(1)
+	.byte	0                       # EOM(2)
+
+	.byte	2                       # Abbreviation Code
+	.byte	52                      # DW_TAG_variable
+	.byte	0                       # DW_CHILDREN_no
+	.byte	3                       # DW_AT_name
+	.byte	14                      # DW_FORM_strp
+	.byte	2                       # DW_AT_location
+	.byte	24                      # DW_FORM_exprloc
+	.byte	0                       # EOM(1)
+	.byte	0                       # EOM(2)
+
+	.byte	3                       # Abbreviation Code
+	.byte	46                      # DW_TAG_subprogram
+	.byte	1                       # DW_CHILDREN_yes
+	.byte	3                       # DW_AT_name
+	.byte	14                      # DW_FORM_strp
+	.byte	110                     # DW_AT_linkage_name
+	.byte	14                      # DW_FORM_strp
+	.byte	82                      # DW_AT_entry_pc
+	.byte	1                       # DW_FORM_addr
+	.byte	0                       # EOM(1)
+	.byte	0                       # EOM(2)
+
+	.byte	4                       # Abbreviation Code
+	.byte	57                      # DW_TAG_namespace
+	.byte	1                       # DW_CHILDREN_yes
+	.byte	3                       # DW_AT_name
+	.byte	14                      # DW_FORM_strp
+	.byte	0                       # EOM(1)
+	.byte	0                       # EOM(2)
+
+	.byte	5                       # Abbreviation Code
+	.byte	52                      # DW_TAG_variable
+	.byte	0                       # DW_CHILDREN_no
+	.byte	3                       # DW_AT_name
+	.byte	14                      # DW_FORM_strp
+	.byte	2                       # DW_AT_location
+	.byte	23                      # DW_FORM_sec_offset
+	.byte	0                       # EOM(1)
+	.byte	0                       # EOM(2)
+
+	.byte	6                       # Abbreviation Code
+	.byte	57                      # DW_TAG_namespace
+	.byte	1                       # DW_CHILDREN_yes
+	.byte	0                       # EOM(1)
+	.byte	0                       # EOM(2)
+
+	.byte	7                       # Abbreviation Code
+	.byte	29                      # DW_TAG_inlined_subroutine
+	.byte	0                       # DW_CHILDREN_no
+	.byte	3                       # DW_AT_name
+	.byte	14                      # DW_FORM_strp
+	.byte	17                      # DW_AT_low_pc
+	.byte	1                       # DW_FORM_addr
+	.byte	18                      # DW_AT_high_pc
+	.byte	1                       # DW_FORM_addr
+	.byte	0                       # EOM(1)
+	.byte	0                       # EOM(2)
+
+	.byte	8                       # Abbreviation Code
+	.byte	10                      # DW_TAG_label
+	.byte	0                       # DW_CHILDREN_no
+	.byte	3                       # DW_AT_name
+	.byte	14                      # DW_FORM_strp
+	.byte	82                      # DW_AT_entry_pc
+	.byte	1                       # DW_FORM_addr
+	.byte	0                       # EOM(1)
+	.byte	0                       # EOM(2)
+
+	.byte	0                       # EOM(3)
+	.section	.debug_info,"",@progbits
+.Lcu_begin0:
+	.long	.Lcu_end0-.Lcu_start0   # Length of Unit
+.Lcu_start0:
+	.short	4                       # DWARF version number
+	.long	.debug_abbrev           # Offset Into Abbrev. Section
+	.byte	8                       # Address Size (in bytes)
+	.byte	1                       # Abbrev [1] DW_TAG_compile_unit
+	.long	.Linfo_producer         # DW_AT_producer
+
+	.byte	4                       # Abbrev [4] DW_TAG_namespace
+	.long	.Lnamespace             # DW_AT_name
+	.byte	2                       # Abbrev [2] DW_TAG_variable
+	.long	.Lname_var_block_addr   # DW_AT_name
+	.byte	9                       # DW_AT_location
+	.byte	3                       # DW_OP_addr
+	.quad	0x47
+	.byte	0                       # End Of Children Mark
+
+	.byte	6                       # Abbrev [6] DW_TAG_namespace
+	.byte	5                       # Abbrev [5] DW_TAG_variable
+	.long	.Lname_var_loc_addr     # DW_AT_name
+	.long	.Ldebug_loc0            # DW_AT_location
+	.byte	0                       # End Of Children Mark
+
+	.byte	2                       # Abbrev [2] DW_TAG_variable
+	.long	.Lname_var_loc_tls      # DW_AT_name
+	.byte	1                       # DW_AT_location
+	.byte	0x9b                    # DW_OP_form_tls_address
+
+	.byte	2                       # Abbrev [2] DW_TAG_variable
+	.long	.Lname_var_loc_gnu_tls  # DW_AT_name
+	.byte	1                       # DW_AT_location
+	.byte	0xe0                    # DW_OP_GNU_push_tls_address
+
+	.byte	3                       # Abbrev [3] DW_TAG_subprogram
+	.long	.Lname_fun_name         # DW_AT_name
+	.long	.Lname_fun_link_name    # DW_AT_linkage_name
+	.quad	0x47                    # DW_AT_entry_pc
+	.byte	7                       # Abbrev [7] DW_TAG_inlined_subroutine
+	.long	.Lname_fun_inline       # DW_AT_name
+	.quad	0x48                    # DW_AT_low_pc
+	.quad	0x49                    # DW_AT_high_pc
+	.byte	8                       # Abbrev [8] DW_TAG_label
+	.long	.Lname_label            # DW_AT_name
+	.quad	0x4a                    # DW_AT_entry_pc
+	.byte	0                       # End Of Children Mark
+
+	.byte	0                       # End Of Children Mark
+.Lcu_end0:
+
+	.section	.debug_names,"",@progbits
+	.long	.Lnames_end0-.Lnames_start0 # Header: contribution length
+.Lnames_start0:
+	.short	5                       # Header: version
+	.short	0                       # Header: padding
+	.long	1                       # Header: compilation unit count
+	.long	0                       # Header: local type unit count
+	.long	0                       # Header: foreign type unit count
+	.long	0                       # Header: bucket count
+	.long	0                       # Header: name count
+	.long	.Lnames_abbrev_end0-.Lnames_abbrev_start0 # Header: abbreviation table size
+	.long	0                       # Header: augmentation length
+	.long	.Lcu_begin0             # Compilation unit 0
+.Lnames_abbrev_start0:
+	.byte	0                       # End of abbrev list
+.Lnames_abbrev_end0:
+.Lnames_entries0:
+.Lnames_end0:
+