Add a command line option -gdwarf-aranges that will turn on emitting

the dwarf .debug_aranges section.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@201379 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 15 insertions, 1 deletions

diff --git a/include/clang/Driver/CC1Options.td b/include/clang/Driver/CC1Options.td
index c4d04e9e07..66674ab442 100644
--- a/include/clang/Driver/CC1Options.td
+++ b/include/clang/Driver/CC1Options.td
@@ -138,6 +138,8 @@ def split_dwarf : Flag<["-"], "split-dwarf">,
   HelpText<"Split out the dwarf .dwo sections">;
 def gnu_pubnames : Flag<["-"], "gnu-pubnames">,
   HelpText<"Emit newer GNU style pubnames">;
+def arange_sections : Flag<["-"], "arange_sections">,
+  HelpText<"Emit DWARF .debug_arange sections">;
 def fforbid_guard_variables : Flag<["-"], "fforbid-guard-variables">,
   HelpText<"Emit an error if a C++ static local initializer would need a guard variable">;
 def no_implicit_float : Flag<["-"], "no-implicit-float">,
diff --git a/include/clang/Driver/Options.td b/include/clang/Driver/Options.td
index ed0fc0315e..0877133da1 100644
--- a/include/clang/Driver/Options.td
+++ b/include/clang/Driver/Options.td
@@ -924,6 +924,7 @@ def gno_strict_dwarf : Flag<["-"], "gno-strict-dwarf">, Group<g_flags_Group>;
 def gcolumn_info : Flag<["-"], "gcolumn-info">, Group<g_flags_Group>;
 def gsplit_dwarf : Flag<["-"], "gsplit-dwarf">, Group<g_flags_Group>;
 def ggnu_pubnames : Flag<["-"], "ggnu-pubnames">, Group<g_flags_Group>;
+def gdwarf_aranges : Flag<["-"], "gdwarf-aranges">, Group<g_flags_Group>;
 def headerpad__max__install__names : Joined<["-"], "headerpad_max_install_names">;
 def help : Flag<["-", "--"], "help">, Flags<[CC1Option]>,
   HelpText<"Display available options">;
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index feac80df96..083bc48d69 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -2690,6 +2690,13 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
     CmdArgs.push_back("-generate-gnu-dwarf-pub-sections");
   }
 
+  // -gdwarf-aranges turns on the emission of the aranges section in the
+  // backend.
+  if (Args.hasArg(options::OPT_gdwarf_aranges)) {
+    CmdArgs.push_back("-backend-option");
+    CmdArgs.push_back("-generate-arange-section");
+  }
+
   if (Args.hasFlag(options::OPT_fdebug_types_section,
                    options::OPT_fno_debug_types_section, false)) {
     CmdArgs.push_back("-backend-option");
diff --git a/test/Driver/debug-options.c b/test/Driver/debug-options.c
index 8582896ca2..d18c26878a 100644
--- a/test/Driver/debug-options.c
+++ b/test/Driver/debug-options.c
@@ -50,6 +50,8 @@
 //
 // RUN: %clang -### -c -ggnu-pubnames %s 2>&1 | FileCheck -check-prefix=GOPT %s
 //
+// RUN: %clang -### -c -gdwarf-aranges %s 2>&1 | FileCheck -check-prefix=GARANGE %s
+//
 // RUN: %clang -### -fdebug-types-section %s 2>&1 \
 // RUN:        | FileCheck -check-prefix=FDTS %s
 //
@@ -62,7 +64,7 @@
 //
 // G_DARWIN: "-cc1"
 // G_DARWIN: "-gdwarf-2"
-// 
+//
 // G_D2: "-cc1"
 // G_D2: "-gdwarf-2"
 //
@@ -86,6 +88,8 @@
 //
 // GOPT: -generate-gnu-dwarf-pub-sections
 //
+// GARANGE: -generate-arange-section
+//
 // FDTS: "-backend-option" "-generate-type-units"
 //
 // NOFDTS-NOT: "-backend-option" "-generate-type-units"