From a5415bcc570b9e49ab4cd2aa5c951ea0d4bb0316 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Wed, 11 Mar 2015 04:20:31 +0000
Subject: [PATCH] Don't print labels that on ELF are never used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231904 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/MC/MCObjectFileInfo.cpp     | 30 ++++++++++++++----------------
 test/DebugInfo/X86/stmt-list.ll |  1 -
 test/MC/ELF/gen-dwarf.s         |  1 -
 3 files changed, 14 insertions(+), 18 deletions(-)

diff --git a/lib/MC/MCObjectFileInfo.cpp b/lib/MC/MCObjectFileInfo.cpp
index ec1d4ba3364..cd7036249ad 100644
--- a/lib/MC/MCObjectFileInfo.cpp
+++ b/lib/MC/MCObjectFileInfo.cpp
@@ -459,8 +459,7 @@ void MCObjectFileInfo::InitELFMCObjectFileInfo(Triple T) {
                                           "section_abbrev");
   DwarfInfoSection =
       Ctx->getELFSection(".debug_info", ELF::SHT_PROGBITS, 0, "section_info");
-  DwarfLineSection =
-      Ctx->getELFSection(".debug_line", ELF::SHT_PROGBITS, 0, "section_line");
+  DwarfLineSection = Ctx->getELFSection(".debug_line", ELF::SHT_PROGBITS, 0);
   DwarfFrameSection = Ctx->getELFSection(".debug_frame", ELF::SHT_PROGBITS, 0);
   DwarfPubNamesSection =
       Ctx->getELFSection(".debug_pubnames", ELF::SHT_PROGBITS, 0);
@@ -470,11 +469,10 @@ void MCObjectFileInfo::InitELFMCObjectFileInfo(Triple T) {
       Ctx->getELFSection(".debug_gnu_pubnames", ELF::SHT_PROGBITS, 0);
   DwarfGnuPubTypesSection =
       Ctx->getELFSection(".debug_gnu_pubtypes", ELF::SHT_PROGBITS, 0);
-  DwarfStrSection = Ctx->getELFSection(".debug_str", ELF::SHT_PROGBITS,
-                                       ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "",
-                                       "info_string");
-  DwarfLocSection = Ctx->getELFSection(".debug_loc", ELF::SHT_PROGBITS, 0,
-                                       "section_debug_loc");
+  DwarfStrSection =
+      Ctx->getELFSection(".debug_str", ELF::SHT_PROGBITS,
+                         ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");
+  DwarfLocSection = Ctx->getELFSection(".debug_loc", ELF::SHT_PROGBITS, 0);
   DwarfARangesSection =
       Ctx->getELFSection(".debug_aranges", ELF::SHT_PROGBITS, 0);
   DwarfRangesSection =
@@ -493,15 +491,15 @@ void MCObjectFileInfo::InitELFMCObjectFileInfo(Triple T) {
       Ctx->getELFSection(".apple_types", ELF::SHT_PROGBITS, 0, "types_begin");
 
   // Fission Sections
-  DwarfInfoDWOSection = Ctx->getELFSection(".debug_info.dwo", ELF::SHT_PROGBITS,
-                                           0, "section_info_dwo");
-  DwarfTypesDWOSection = Ctx->getELFSection(
-      ".debug_types.dwo", ELF::SHT_PROGBITS, 0, "section_types_dwo");
-  DwarfAbbrevDWOSection = Ctx->getELFSection(
-      ".debug_abbrev.dwo", ELF::SHT_PROGBITS, 0, "section_abbrev_dwo");
-  DwarfStrDWOSection = Ctx->getELFSection(".debug_str.dwo", ELF::SHT_PROGBITS,
-                                          ELF::SHF_MERGE | ELF::SHF_STRINGS, 1,
-                                          "", "skel_string");
+  DwarfInfoDWOSection =
+      Ctx->getELFSection(".debug_info.dwo", ELF::SHT_PROGBITS, 0);
+  DwarfTypesDWOSection =
+      Ctx->getELFSection(".debug_types.dwo", ELF::SHT_PROGBITS, 0);
+  DwarfAbbrevDWOSection =
+      Ctx->getELFSection(".debug_abbrev.dwo", ELF::SHT_PROGBITS, 0);
+  DwarfStrDWOSection =
+      Ctx->getELFSection(".debug_str.dwo", ELF::SHT_PROGBITS,
+                         ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");
   DwarfLineDWOSection =
       Ctx->getELFSection(".debug_line.dwo", ELF::SHT_PROGBITS, 0);
   DwarfLocDWOSection =
diff --git a/test/DebugInfo/X86/stmt-list.ll b/test/DebugInfo/X86/stmt-list.ll
index 7cad3fc7ee3..aac583c61c7 100644
--- a/test/DebugInfo/X86/stmt-list.ll
+++ b/test/DebugInfo/X86/stmt-list.ll
@@ -3,7 +3,6 @@
 ; CHECK:      .long   .Lline_table_start0          # DW_AT_stmt_list
 
 ; CHECK:      .section        .debug_line,"",@progbits
-; CHECK-NEXT: .Lsection_line:
 ; CHECK-NEXT: .Lline_table_start0:
 
 define void @f() {
diff --git a/test/MC/ELF/gen-dwarf.s b/test/MC/ELF/gen-dwarf.s
index 5c90bf724b9..4e773c79af2 100644
--- a/test/MC/ELF/gen-dwarf.s
+++ b/test/MC/ELF/gen-dwarf.s
@@ -49,7 +49,6 @@ foo:
 // ASM-NEXT: .long [[LINE_LABEL:.L[a-z0-9]+]]
 
 // ASM: .section .debug_line
-// ASM-NEXT:.Lsection_line:
 // ASM-NEXT: [[LINE_LABEL]]
 
 // DWARF1: Dwarf version 1 is not supported.
-- 
2.34.1