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

Differential Revision: http://reviews.llvm.org/D16094 llvm-svn: 258712
llvm · Jan 25, 2016 · 4391d09 · 4391d09
1 parent e71c99c
commit 4391d09
Showing 2 changed files with 20 additions and 0 deletions.
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
@@ -1817,6 +1817,17 @@ static void AddGoldPlugin(const ToolChain &ToolChain, const ArgList &Args,
 
   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

diff --git a/clang/test/Driver/lto.c b/clang/test/Driver/lto.c
@@ -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