[clang] 573255b - [clang][cli] Squash exception model in LangOptions into one member

[Jan Svoboda via cfe-commits]

Author: Jan Svoboda
Date: 2020-12-15T10:15:58+01:00
New Revision: 573255b47eb9b210e74a1c620fee363dfaa52794

URL: https://github.com/llvm/llvm-project/commit/573255b47eb9b210e74a1c620fee363dfaa52794
DIFF: https://github.com/llvm/llvm-project/commit/573255b47eb9b210e74a1c620fee363dfaa52794.diff

LOG: [clang][cli] Squash exception model in LangOptions into one member

This squashes multiple members in LangOptions into one. This is leveraged in a follow-up patch that implements marshalling of related command-line options.

Depends on D93214.

Reviewed By: dexonsmith

Differential Revision: https://reviews.llvm.org/D93215

Added: 
    

Modified: 
    clang/include/clang/Basic/LangOptions.def
    clang/include/clang/Basic/LangOptions.h
    clang/lib/Frontend/CompilerInvocation.cpp

Removed: 
    


################################################################################
diff  --git a/clang/include/clang/Basic/LangOptions.def b/clang/include/clang/Basic/LangOptions.def
index 19fb4ae82b89..251fd68f4df8 100644
--- a/clang/include/clang/Basic/LangOptions.def
+++ b/clang/include/clang/Basic/LangOptions.def
@@ -129,10 +129,8 @@ LANGOPT(ZVector           , 1, 0, "System z vector extensions")
 LANGOPT(Exceptions        , 1, 0, "exception handling")
 LANGOPT(ObjCExceptions    , 1, 0, "Objective-C exceptions")
 LANGOPT(CXXExceptions     , 1, 0, "C++ exceptions")
-LANGOPT(DWARFExceptions   , 1, 0, "dwarf exception handling")
-LANGOPT(SjLjExceptions    , 1, 0, "setjmp-longjump exception handling")
-LANGOPT(SEHExceptions     , 1, 0, "SEH .xdata exception handling")
-LANGOPT(WasmExceptions    , 1, 0, "WebAssembly exception handling")
+ENUM_LANGOPT(ExceptionHandling, ExceptionHandlingKind, 3,
+             ExceptionHandlingKind::None, "exception handling")
 LANGOPT(IgnoreExceptions  , 1, 0, "ignore exceptions")
 LANGOPT(ExternCNoUnwind   , 1, 0, "Assume extern C functions don't unwind")
 LANGOPT(TraditionalCPP    , 1, 0, "traditional CPP emulation")

diff  --git a/clang/include/clang/Basic/LangOptions.h b/clang/include/clang/Basic/LangOptions.h
index d4791650ec6b..2780e4bf35fd 100644
--- a/clang/include/clang/Basic/LangOptions.h
+++ b/clang/include/clang/Basic/LangOptions.h
@@ -22,6 +22,7 @@
 #include "llvm/ADT/FloatingPointMode.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/Triple.h"
+#include "llvm/MC/MCTargetOptions.h"
 #include <string>
 #include <vector>
 
@@ -209,6 +210,9 @@ class LangOptions : public LangOptionsBase {
     FPE_Strict
   };
 
+  /// Possible exception handling behavior.
+  using ExceptionHandlingKind = llvm::ExceptionHandling;
+
   enum class LaxVectorConversionKind {
     /// Permit no implicit vector bitcasts.
     None,
@@ -381,10 +385,21 @@ class LangOptions : public LangOptionsBase {
     return getSignReturnAddressScope() == SignReturnAddressScopeKind::All;
   }
 
-  bool hasSjLjExceptions() const { return SjLjExceptions; }
-  bool hasSEHExceptions() const { return SEHExceptions; }
-  bool hasDWARFExceptions() const { return DWARFExceptions; }
-  bool hasWasmExceptions() const { return WasmExceptions; }
+  bool hasSjLjExceptions() const {
+    return getExceptionHandling() == llvm::ExceptionHandling::SjLj;
+  }
+
+  bool hasSEHExceptions() const {
+    return getExceptionHandling() == llvm::ExceptionHandling::WinEH;
+  }
+
+  bool hasDWARFExceptions() const {
+    return getExceptionHandling() == llvm::ExceptionHandling::DwarfCFI;
+  }
+
+  bool hasWasmExceptions() const {
+    return getExceptionHandling() == llvm::ExceptionHandling::Wasm;
+  }
 };
 
 /// Floating point control options

diff  --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index c1d5364d72ea..e4058cfc1915 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -2981,10 +2981,14 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
       Diags.Report(diag::err_fe_invalid_exception_model)
           << Opt.getName() << T.str();
 
-    Opts.SjLjExceptions = Opt.matches(options::OPT_fsjlj_exceptions);
-    Opts.SEHExceptions = Opt.matches(options::OPT_fseh_exceptions);
-    Opts.DWARFExceptions = Opt.matches(options::OPT_fdwarf_exceptions);
-    Opts.WasmExceptions = Opt.matches(options::OPT_fwasm_exceptions);
+    if (Opt.matches(options::OPT_fsjlj_exceptions))
+      Opts.setExceptionHandling(llvm::ExceptionHandling::SjLj);
+    else if (Opt.matches(options::OPT_fseh_exceptions))
+      Opts.setExceptionHandling(llvm::ExceptionHandling::WinEH);
+    else if (Opt.matches(options::OPT_fdwarf_exceptions))
+      Opts.setExceptionHandling(llvm::ExceptionHandling::DwarfCFI);
+    else if (Opt.matches(options::OPT_fwasm_exceptions))
+      Opts.setExceptionHandling(llvm::ExceptionHandling::Wasm);
   }
 
   Opts.ExternCNoUnwind = Args.hasArg(OPT_fexternc_nounwind);