Recommit CC1 part of debugger tuning; pass through setting from driver to LLVM.

Reapplies r256063, except instead of frugally re-using an LLVM enum,
we define a Clang enum, to avoid exposing too much LLVM interface.

Differential Revision: http://reviews.llvm.org/D15650

llvm-svn: 256078

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index c6068d7d94d..7fe0a867535 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -405,6 +405,13 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
             .Case("limited", CodeGenOptions::LimitedDebugInfo)
             .Case("standalone", CodeGenOptions::FullDebugInfo));
   }
+  if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
+    Opts.setDebuggerTuning(
+        llvm::StringSwitch<CodeGenOptions::DebuggerKind>(A->getValue())
+            .Case("gdb", CodeGenOptions::DebuggerKindGDB)
+            .Case("lldb", CodeGenOptions::DebuggerKindLLDB)
+            .Case("sce", CodeGenOptions::DebuggerKindSCE));
+  }
   Opts.DwarfVersion = getLastArgIntValue(Args, OPT_dwarf_version_EQ, 0, Diags);
   Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
   Opts.EmitCodeView = Args.hasArg(OPT_gcodeview);