[PATCH] D51576: Enable DWARF accelerator tables by default when tuning for lldb (-glldb => -gpubnames)

[Pavel Labath via Phabricator via cfe-commits]

labath created this revision.
labath added a reviewer: dblaikie.

DWARF v5 accelerator tables provide a considerable performance
improvement for lldb and will make the default -glldb behavior same on
all targets (right now we emit apple tables on apple targets, but these
are not controlled by -gpubnames, only by -glldb).


Repository:
  rC Clang

https://reviews.llvm.org/D51576

Files:
  lib/Driver/ToolChains/Clang.cpp
  test/Driver/debug-options.c


Index: test/Driver/debug-options.c
===================================================================
--- test/Driver/debug-options.c
+++ test/Driver/debug-options.c
@@ -165,6 +165,9 @@
 // RUN: %clang -### -c -gsplit-dwarf %s 2>&1 | FileCheck -check-prefix=GPUB %s
 // RUN: %clang -### -c -gsplit-dwarf -gno-pubnames %s 2>&1 | FileCheck -check-prefix=NOPUB %s
 //
+// RUN: %clang -### -c -glldb %s 2>&1 | FileCheck -check-prefix=GPUB %s
+// RUN: %clang -### -c -glldb -gno-pubnames %s 2>&1 | FileCheck -check-prefix=NOPUB %s
+//
 // RUN: %clang -### -c -gdwarf-aranges %s 2>&1 | FileCheck -check-prefix=GARANGE %s
 //
 // RUN: %clang -### -fdebug-types-section -target x86_64-unknown-linux %s 2>&1 \
Index: lib/Driver/ToolChains/Clang.cpp
===================================================================
--- lib/Driver/ToolChains/Clang.cpp
+++ lib/Driver/ToolChains/Clang.cpp
@@ -3072,7 +3072,7 @@
   const auto *PubnamesArg =
       Args.getLastArg(options::OPT_ggnu_pubnames, options::OPT_gno_gnu_pubnames,
                       options::OPT_gpubnames, options::OPT_gno_pubnames);
-  if (SplitDWARFArg ||
+  if (SplitDWARFArg || DebuggerTuning == llvm::DebuggerKind::LLDB ||
       (PubnamesArg && checkDebugInfoOption(PubnamesArg, Args, D, TC)))
     if (!PubnamesArg ||
         (!PubnamesArg->getOption().matches(options::OPT_gno_gnu_pubnames) &&


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