Enable DWARF accelerator tables by default when tuning for lldb (-glldb => -gpubnames)

Summary:
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).

Reviewers: dblaikie

Subscribers: probinson, clayborg, JDevlieghere, aprantl, cfe-commits

Differential Revision: https://reviews.llvm.org/D51576

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@341472 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Driver/ToolChains/Clang.cpp b/lib/Driver/ToolChains/Clang.cpp
index 79129a7a7c6259eee9ad0f7adc8794430517b5f7..959a9b1fbcabf5c3a8babde6d6813a5a4534675b 100644 (file)
--- a/lib/Driver/ToolChains/Clang.cpp
+++ b/lib/Driver/ToolChains/Clang.cpp
@@ -3072,7 +3072,7 @@ static void RenderDebugOptions(const ToolChain &TC, const Driver &D,
   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) &&

diff --git a/test/Driver/debug-options.c b/test/Driver/debug-options.c
index 04b9383c063992f7d00f5a243aaa2b1673a7d4be..9c90bcb2ef91671d46ba62e17bef6fde7b8a20ac 100644 (file)
--- a/test/Driver/debug-options.c
+++ b/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 \