r258712 - LTO via the gold plugin needs to be told about debugger tuning.

[Paul Robinson via cfe-commits]

Author: probinson
Date: Mon Jan 25 13:46:40 2016
New Revision: 258712

URL: http://llvm.org/viewvc/llvm-project?rev=258712&view=rev
Log:
LTO via the gold plugin needs to be told about debugger tuning.

Differential Revision: http://reviews.llvm.org/D16094

Modified:
    cfe/trunk/lib/Driver/Tools.cpp
    cfe/trunk/test/Driver/lto.c

Modified: cfe/trunk/lib/Driver/Tools.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=258712&r1=258711&r2=258712&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/Tools.cpp (original)
+++ cfe/trunk/lib/Driver/Tools.cpp Mon Jan 25 13:46:40 2016
@@ -1817,6 +1817,17 @@ static void AddGoldPlugin(const ToolChai
 
   if (IsThinLTO)
     CmdArgs.push_back("-plugin-opt=thinlto");
+
+  // If an explicit debugger tuning argument appeared, pass it along.
+  if (Arg *A = Args.getLastArg(options::OPT_gTune_Group,
+                               options::OPT_ggdbN_Group)) {
+    if (A->getOption().matches(options::OPT_glldb))
+      CmdArgs.push_back("-plugin-opt=-debugger-tune=lldb");
+    else if (A->getOption().matches(options::OPT_gsce))
+      CmdArgs.push_back("-plugin-opt=-debugger-tune=sce");
+    else
+      CmdArgs.push_back("-plugin-opt=-debugger-tune=gdb");
+  }
 }
 
 /// This is a helper function for validating the optional refinement step

Modified: cfe/trunk/test/Driver/lto.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/lto.c?rev=258712&r1=258711&r2=258712&view=diff
==============================================================================
--- cfe/trunk/test/Driver/lto.c (original)
+++ cfe/trunk/test/Driver/lto.c Mon Jan 25 13:46:40 2016
@@ -49,3 +49,12 @@
 // RUN: FileCheck -check-prefix=CHECK-LINK-NOLTO-ACTION < %t %s
 //
 // CHECK-LINK-NOLTO-ACTION-NOT: "-plugin" "{{.*}}/LLVMgold.so"
+
+// -flto passes along an explicit debugger tuning argument.
+// RUN: %clang -target x86_64-unknown-linux -### %s -flto -glldb 2> %t
+// RUN: FileCheck -check-prefix=CHECK-TUNING-LLDB < %t %s
+// RUN: %clang -target x86_64-unknown-linux -### %s -flto -g 2> %t
+// RUN: FileCheck -check-prefix=CHECK-NO-TUNING < %t %s
+//
+// CHECK-TUNING-LLDB:   "-plugin-opt=-debugger-tune=lldb"
+// CHECK-NO-TUNING-NOT: "-plugin-opt=-debugger-tune