[clang][cli] Generate and round-trip CodeGen options

This patch implements generation of remaining codegen options and tests it by performing parse-generate-parse round trip.

Reviewed By: dexonsmith

Differential Revision: https://reviews.llvm.org/D96056

Author: jansvoboda11

clang/include/clang/Basic/XRayInstr.h

@@ -65,8 +65,13 @@ struct XRayInstrSet {
   XRayInstrMask Mask = 0;
 };
 
+/// Parses a command line argument into a mask.
 XRayInstrMask parseXRayInstrValue(StringRef Value);
 
+/// Serializes a set into a list of command line arguments.
+void serializeXRayInstrValue(XRayInstrSet Set,
+                             SmallVectorImpl<StringRef> &Values);
+
 } // namespace clang
 
 #endif // LLVM_CLANG_BASIC_XRAYINSTR_H

clang/include/clang/Driver/Options.td

@@ -4453,12 +4453,7 @@ def migrator_no_finalize_removal : Flag<["-"], "no-finalize-removal">,
 //===----------------------------------------------------------------------===//
 
 let Flags = [CC1Option, CC1AsOption, NoDriverOption] in {
-def debug_info_kind_EQ : Joined<["-"], "debug-info-kind=">,
-  Values<"line-tables-only,line-directives-only,constructor,limited,standalone,unused-types">,
-  NormalizedValuesScope<"codegenoptions">,
-  NormalizedValues<["DebugLineTablesOnly", "DebugDirectivesOnly", "DebugInfoConstructor",
-                    "LimitedDebugInfo", "FullDebugInfo", "UnusedTypeInfo"]>,
-  MarshallingInfoString<CodeGenOpts<"DebugInfo">, "NoDebugInfo">, AutoNormalizeEnum;
+def debug_info_kind_EQ : Joined<["-"], "debug-info-kind=">;
 def debug_info_macro : Flag<["-"], "debug-info-macro">,
   HelpText<"Emit macro debug information">,
   MarshallingInfoFlag<CodeGenOpts<"MacroDebugInfo">>;

clang/include/clang/Frontend/CompilerInvocation.h

@@ -266,12 +266,26 @@ class CompilerInvocation : public CompilerInvocationBase {
                                StringAllocator SA, const llvm::Triple &T);
 
   /// Parse command line options that map to CodeGenOptions.
-  static bool ParseCodeGenArgs(CodeGenOptions &Opts, llvm::opt::ArgList &Args,
-                               InputKind IK, DiagnosticsEngine &Diags,
-                               const llvm::Triple &T,
+  static bool ParseCodeGenArgsImpl(CodeGenOptions &Opts,
+                                   llvm::opt::ArgList &Args, InputKind IK,
+                                   DiagnosticsEngine &Diags,
+                                   const llvm::Triple &T,
+                                   const std::string &OutputFile,
+                                   const LangOptions &LangOptsRef);
+
+  static bool ParseCodeGenArgs(CompilerInvocation &Res, CodeGenOptions &Opts,
+                               llvm::opt::ArgList &Args, InputKind IK,
+                               DiagnosticsEngine &Diags, const llvm::Triple &T,
                                const std::string &OutputFile,
                                const LangOptions &LangOptsRef);
 
+  // Generate command line options from CodeGenOptions.
+  static void GenerateCodeGenArgs(const CodeGenOptions &Opts,
+                                  SmallVectorImpl<const char *> &Args,
+                                  StringAllocator SA, const llvm::Triple &T,
+                                  const std::string &OutputFile,
+                                  const LangOptions *LangOpts);
+
   /// Parse command line options that map to HeaderSearchOptions.
   static void ParseHeaderSearchArgs(CompilerInvocation &Res,
                                     HeaderSearchOptions &Opts,

clang/lib/Basic/XRayInstr.cpp

@@ -11,6 +11,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/Basic/XRayInstr.h"
+#include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringSwitch.h"
 
 namespace clang {
@@ -30,4 +31,30 @@ XRayInstrMask parseXRayInstrValue(StringRef Value) {
   return ParsedKind;
 }
 
+void serializeXRayInstrValue(XRayInstrSet Set,
+                             SmallVectorImpl<StringRef> &Values) {
+  if (Set.Mask == XRayInstrKind::All) {
+    Values.push_back("all");
+    return;
+  }
+
+  if (Set.Mask == XRayInstrKind::None) {
+    Values.push_back("none");
+    return;
+  }
+
+  if (Set.has(XRayInstrKind::Custom))
+    Values.push_back("custom");
+
+  if (Set.has(XRayInstrKind::Typed))
+    Values.push_back("typed");
+
+  if (Set.has(XRayInstrKind::FunctionEntry) &&
+      Set.has(XRayInstrKind::FunctionExit))
+    Values.push_back("function");
+  else if (Set.has(XRayInstrKind::FunctionEntry))
+    Values.push_back("function-entry");
+  else if (Set.has(XRayInstrKind::FunctionExit))
+    Values.push_back("function-exit");
+}
 } // namespace clang