Revert "[OpenMP] atomic compare fail : Parser & AST support"

This reverts commit edd675a.

This breaks clang build where every component is a shared library.

The file clang/lib/Basic/OpenMPKinds.cpp, which is a part of
libclangBasic.so, uses `getOpenMPClauseName` which isn't:

/usr/bin/ld: CMakeFiles/obj.clangBasic.dir/OpenMPKinds.cpp.o: in functio
n `clang ::getOpenMPSimpleClauseTypeName(llvm::omp::Clause, unsigned int
)':
OpenMPKinds.cpp:(.text._ZN5clang29getOpenMPSimpleClauseTypeNameEN4llvm3o
mp6ClauseEj+0x9b): undefined reference to `llvm::omp::getOpenMPClauseNam
e(llvm::omp::Clause)'

clang/include/clang/AST/OpenMPClause.h

@@ -2513,89 +2513,6 @@ class OMPRelaxedClause final : public OMPClause {
   }
 };
 
-/// This represents 'fail' clause in the '#pragma omp atomic'
-/// directive.
-///
-/// \code
-/// #pragma omp atomic compare fail
-/// \endcode
-/// In this example directive '#pragma omp atomic compare' has 'fail' clause.
-class OMPFailClause final : public OMPClause {
-
-  // FailParameter is a memory-order-clause. Storing the ClauseKind is
-  // sufficient for our purpose.
-  OpenMPClauseKind FailParameter = llvm::omp::Clause::OMPC_unknown;
-  SourceLocation FailParameterLoc;
-  SourceLocation LParenLoc;
-
-  friend class OMPClauseReader;
-
-  /// Sets the location of '(' in fail clause.
-  void setLParenLoc(SourceLocation Loc) { LParenLoc = Loc; }
-
-  /// Sets the location of memoryOrder clause argument in fail clause.
-  void setFailParameterLoc(SourceLocation Loc) { FailParameterLoc = Loc; }
-
-  /// Sets the mem_order clause for 'atomic compare fail' directive.
-  void setFailParameter(OpenMPClauseKind FailParameter) {
-    this->FailParameter = FailParameter;
-    assert(checkFailClauseParameter(FailParameter) &&
-           "Invalid fail clause parameter");
-  }
-
-public:
-  /// Build 'fail' clause.
-  ///
-  /// \param StartLoc Starting location of the clause.
-  /// \param EndLoc Ending location of the clause.
-  OMPFailClause(SourceLocation StartLoc, SourceLocation EndLoc)
-      : OMPClause(llvm::omp::OMPC_fail, StartLoc, EndLoc) {}
-
-  OMPFailClause(OpenMPClauseKind FailParameter, SourceLocation FailParameterLoc,
-                SourceLocation StartLoc, SourceLocation LParenLoc,
-                SourceLocation EndLoc)
-      : OMPClause(llvm::omp::OMPC_fail, StartLoc, EndLoc),
-        FailParameterLoc(FailParameterLoc), LParenLoc(LParenLoc) {
-
-    setFailParameter(FailParameter);
-  }
-
-  /// Build an empty clause.
-  OMPFailClause()
-      : OMPClause(llvm::omp::OMPC_fail, SourceLocation(), SourceLocation()) {}
-
-  child_range children() {
-    return child_range(child_iterator(), child_iterator());
-  }
-
-  const_child_range children() const {
-    return const_child_range(const_child_iterator(), const_child_iterator());
-  }
-
-  child_range used_children() {
-    return child_range(child_iterator(), child_iterator());
-  }
-  const_child_range used_children() const {
-    return const_child_range(const_child_iterator(), const_child_iterator());
-  }
-
-  static bool classof(const OMPClause *T) {
-    return T->getClauseKind() == llvm::omp::OMPC_fail;
-  }
-
-  /// Gets the location of '(' (for the parameter) in fail clause.
-  SourceLocation getLParenLoc() const {
-    return LParenLoc;
-  }
-
-  /// Gets the location of Fail Parameter (type memory-order-clause) in
-  /// fail clause.
-  SourceLocation getFailParameterLoc() const { return FailParameterLoc; }
-
-  /// Gets the parameter (type memory-order-clause) in Fail clause.
-  OpenMPClauseKind getFailParameter() const { return FailParameter; }
-};
-
 /// This represents clause 'private' in the '#pragma omp ...' directives.
 ///
 /// \code

clang/include/clang/AST/RecursiveASTVisitor.h

@@ -3398,11 +3398,6 @@ bool RecursiveASTVisitor<Derived>::VisitOMPCompareClause(OMPCompareClause *) {
   return true;
 }
 
-template <typename Derived>
-bool RecursiveASTVisitor<Derived>::VisitOMPFailClause(OMPFailClause *) {
-  return true;
-}
-
 template <typename Derived>
 bool RecursiveASTVisitor<Derived>::VisitOMPSeqCstClause(OMPSeqCstClause *) {
   return true;

clang/include/clang/Basic/DiagnosticSemaKinds.td

@@ -10962,8 +10962,6 @@ def note_omp_atomic_compare: Note<
   "expect binary operator in conditional expression|expect '<', '>' or '==' as order operator|expect comparison in a form of 'x == e', 'e == x', 'x ordop expr', or 'expr ordop x'|"
   "expect lvalue for result value|expect scalar value|expect integer value|unexpected 'else' statement|expect '==' operator|expect an assignment statement 'v = x'|"
   "expect a 'if' statement|expect no more than two statements|expect a compound statement|expect 'else' statement|expect a form 'r = x == e; if (r) ...'}0">;
-def err_omp_atomic_fail_wrong_or_no_clauses : Error<"expected a memory order clause">;
-def err_omp_atomic_fail_no_compare : Error<"expected 'compare' clause with the 'fail' modifier">;
 def err_omp_atomic_several_clauses : Error<
   "directive '#pragma omp atomic' cannot contain more than one 'read', 'write', 'update', 'capture', or 'compare' clause">;
 def err_omp_several_mem_order_clauses : Error<

clang/include/clang/Basic/OpenMPKinds.def

@@ -41,9 +41,6 @@
 #ifndef OPENMP_ATOMIC_DEFAULT_MEM_ORDER_KIND
 #define OPENMP_ATOMIC_DEFAULT_MEM_ORDER_KIND(Name)
 #endif
-#ifndef OPENMP_ATOMIC_FAIL_MODIFIER
-#define OPENMP_ATOMIC_FAIL_MODIFIER(Name)
-#endif
 #ifndef OPENMP_AT_KIND
 #define OPENMP_AT_KIND(Name)
 #endif
@@ -141,11 +138,6 @@ OPENMP_ATOMIC_DEFAULT_MEM_ORDER_KIND(seq_cst)
 OPENMP_ATOMIC_DEFAULT_MEM_ORDER_KIND(acq_rel)
 OPENMP_ATOMIC_DEFAULT_MEM_ORDER_KIND(relaxed)
 
-// Modifiers for atomic 'fail' clause.
-OPENMP_ATOMIC_FAIL_MODIFIER(seq_cst)
-OPENMP_ATOMIC_FAIL_MODIFIER(acquire)
-OPENMP_ATOMIC_FAIL_MODIFIER(relaxed)
-
 // Modifiers for 'at' clause.
 OPENMP_AT_KIND(compilation)
 OPENMP_AT_KIND(execution)
@@ -234,7 +226,6 @@ OPENMP_DOACROSS_MODIFIER(source_omp_cur_iteration)
 #undef OPENMP_SCHEDULE_MODIFIER
 #undef OPENMP_SCHEDULE_KIND
 #undef OPENMP_ATOMIC_DEFAULT_MEM_ORDER_KIND
-#undef OPENMP_ATOMIC_FAIL_MODIFIER
 #undef OPENMP_AT_KIND
 #undef OPENMP_SEVERITY_KIND
 #undef OPENMP_MAP_KIND

clang/include/clang/Basic/OpenMPKinds.h

@@ -363,11 +363,6 @@ bool isOpenMPCombinedParallelADirective(OpenMPDirectiveKind DKind);
 /// \return true - if the above condition is met for this directive
 /// otherwise - false.
 bool needsTaskBasedThreadLimit(OpenMPDirectiveKind DKind);
-
-/// Checks if the parameter to the fail clause in "#pragma atomic compare fail"
-/// is restricted only to memory order clauses of "OMPC_acquire",
-/// "OMPC_relaxed" and "OMPC_seq_cst".
-bool checkFailClauseParameter(OpenMPClauseKind FailClauseParameter);
 }
 
 #endif

clang/include/clang/Sema/Sema.h

@@ -12193,13 +12193,6 @@ class Sema final {
   /// Called on well-formed 'compare' clause.
   OMPClause *ActOnOpenMPCompareClause(SourceLocation StartLoc,
                                       SourceLocation EndLoc);
-  /// Called on well-formed 'fail' clause.
-  OMPClause *ActOnOpenMPFailClause(SourceLocation StartLoc,
-                                   SourceLocation EndLoc);
-  OMPClause *ActOnOpenMPFailClause(
-      OpenMPClauseKind Kind, SourceLocation KindLoc,
-      SourceLocation StartLoc, SourceLocation LParenLoc, SourceLocation EndLoc);
-
   /// Called on well-formed 'seq_cst' clause.
   OMPClause *ActOnOpenMPSeqCstClause(SourceLocation StartLoc,
                                      SourceLocation EndLoc);

clang/lib/AST/OpenMPClause.cpp

@@ -130,7 +130,6 @@ const OMPClauseWithPreInit *OMPClauseWithPreInit::get(const OMPClause *C) {
   case OMPC_update:
   case OMPC_capture:
   case OMPC_compare:
-  case OMPC_fail:
   case OMPC_seq_cst:
   case OMPC_acq_rel:
   case OMPC_acquire:
@@ -228,7 +227,6 @@ const OMPClauseWithPostUpdate *OMPClauseWithPostUpdate::get(const OMPClause *C)
   case OMPC_update:
   case OMPC_capture:
   case OMPC_compare:
-  case OMPC_fail:
   case OMPC_seq_cst:
   case OMPC_acq_rel:
   case OMPC_acquire:
@@ -1927,16 +1925,6 @@ void OMPClausePrinter::VisitOMPCompareClause(OMPCompareClause *) {
   OS << "compare";
 }
 
-void OMPClausePrinter::VisitOMPFailClause(OMPFailClause *Node) {
-  OS << "fail";
-  if (Node) {
-    OS << "(";
-    OS << getOpenMPSimpleClauseTypeName(
-        Node->getClauseKind(), static_cast<int>(Node->getFailParameter()));
-    OS << ")";
-  }
-}
-
 void OMPClausePrinter::VisitOMPSeqCstClause(OMPSeqCstClause *) {
   OS << "seq_cst";
 }

clang/lib/AST/StmtProfile.cpp

@@ -582,8 +582,6 @@ void OMPClauseProfiler::VisitOMPCaptureClause(const OMPCaptureClause *) {}
 
 void OMPClauseProfiler::VisitOMPCompareClause(const OMPCompareClause *) {}
 
-void OMPClauseProfiler::VisitOMPFailClause(const OMPFailClause *) {}
-
 void OMPClauseProfiler::VisitOMPSeqCstClause(const OMPSeqCstClause *) {}
 
 void OMPClauseProfiler::VisitOMPAcqRelClause(const OMPAcqRelClause *) {}

clang/lib/Basic/OpenMPKinds.cpp

@@ -104,11 +104,6 @@ unsigned clang::getOpenMPSimpleClauseType(OpenMPClauseKind Kind, StringRef Str,
   .Case(#Name, OMPC_ATOMIC_DEFAULT_MEM_ORDER_##Name)
 #include "clang/Basic/OpenMPKinds.def"
         .Default(OMPC_ATOMIC_DEFAULT_MEM_ORDER_unknown);
-  case OMPC_fail:
-    return static_cast<unsigned int>(llvm::StringSwitch<llvm::omp::Clause>(Str)
-#define OPENMP_ATOMIC_FAIL_MODIFIER(Name) .Case(#Name, OMPC_##Name)
-#include "clang/Basic/OpenMPKinds.def"
-                                         .Default(OMPC_unknown));
   case OMPC_device_type:
     return llvm::StringSwitch<OpenMPDeviceType>(Str)
 #define OPENMP_DEVICE_TYPE_KIND(Name) .Case(#Name, OMPC_DEVICE_TYPE_##Name)
@@ -439,11 +434,6 @@ const char *clang::getOpenMPSimpleClauseTypeName(OpenMPClauseKind Kind,
 #include "clang/Basic/OpenMPKinds.def"
     }
     llvm_unreachable("Invalid OpenMP 'depend' clause type");
-  case OMPC_fail: {
-    OpenMPClauseKind CK = static_cast<OpenMPClauseKind>(Type);
-    return getOpenMPClauseName(CK).data();
-    llvm_unreachable("Invalid OpenMP 'fail' clause modifier");
-  }
   case OMPC_device:
     switch (Type) {
     case OMPC_DEVICE_unknown:
@@ -899,10 +889,3 @@ void clang::getOpenMPCaptureRegions(
     llvm_unreachable("Unknown OpenMP directive");
   }
 }
-
-bool clang::checkFailClauseParameter(OpenMPClauseKind FailClauseParameter) {
-  return FailClauseParameter == llvm::omp::OMPC_acquire ||
-         FailClauseParameter == llvm::omp::OMPC_relaxed ||
-         FailClauseParameter == llvm::omp::OMPC_seq_cst;
-}
-

clang/lib/CodeGen/CGStmtOpenMP.cpp

@@ -6516,10 +6516,6 @@ static void emitOMPAtomicExpr(CodeGenFunction &CGF, OpenMPClauseKind Kind,
                              IsPostfixUpdate, IsFailOnly, Loc);
     break;
   }
-  case OMPC_fail: {
-    //TODO
-    break;
-  }
   default:
     llvm_unreachable("Clause is not allowed in 'omp atomic'.");
   }

clang/lib/Parse/ParseOpenMP.cpp

@@ -3248,7 +3248,6 @@ OMPClause *Parser::ParseOpenMPClause(OpenMPDirectiveKind DKind,
     else
       Clause = ParseOpenMPSingleExprClause(CKind, WrongDirective);
     break;
-  case OMPC_fail:
   case OMPC_default:
   case OMPC_proc_bind:
   case OMPC_atomic_default_mem_order:

clang/lib/Sema/SemaOpenMP.cpp

@@ -12682,14 +12682,6 @@ StmtResult Sema::ActOnOpenMPAtomicDirective(ArrayRef<OMPClause *> Clauses,
       }
       break;
     }
-    case OMPC_fail: {
-      if (AtomicKind != OMPC_compare) {
-        Diag(C->getBeginLoc(), diag::err_omp_atomic_fail_no_compare)
-            << SourceRange(C->getBeginLoc(), C->getEndLoc());
-        return StmtError();
-      }
-      break;
-    }
     case OMPC_seq_cst:
     case OMPC_acq_rel:
     case OMPC_acquire:
@@ -16891,11 +16883,6 @@ OMPClause *Sema::ActOnOpenMPSimpleClause(
         static_cast<OpenMPAtomicDefaultMemOrderClauseKind>(Argument),
         ArgumentLoc, StartLoc, LParenLoc, EndLoc);
     break;
-  case OMPC_fail:
-    Res = ActOnOpenMPFailClause(
-        static_cast<OpenMPClauseKind>(Argument),
-        ArgumentLoc, StartLoc, LParenLoc, EndLoc);
-    break;
   case OMPC_update:
     Res = ActOnOpenMPUpdateClause(static_cast<OpenMPDependClauseKind>(Argument),
                                   ArgumentLoc, StartLoc, LParenLoc, EndLoc);
@@ -17536,9 +17523,6 @@ OMPClause *Sema::ActOnOpenMPClause(OpenMPClauseKind Kind,
   case OMPC_compare:
     Res = ActOnOpenMPCompareClause(StartLoc, EndLoc);
     break;
-  case OMPC_fail:
-    Res = ActOnOpenMPFailClause(StartLoc, EndLoc);
-    break;
   case OMPC_seq_cst:
     Res = ActOnOpenMPSeqCstClause(StartLoc, EndLoc);
     break;
@@ -17699,24 +17683,6 @@ OMPClause *Sema::ActOnOpenMPCompareClause(SourceLocation StartLoc,
   return new (Context) OMPCompareClause(StartLoc, EndLoc);
 }
 
-OMPClause *Sema::ActOnOpenMPFailClause(SourceLocation StartLoc,
-                                       SourceLocation EndLoc) {
-  return new (Context) OMPFailClause(StartLoc, EndLoc);
-}
-
-OMPClause *Sema::ActOnOpenMPFailClause(
-      OpenMPClauseKind Parameter, SourceLocation KindLoc,
-      SourceLocation StartLoc, SourceLocation LParenLoc,
-      SourceLocation EndLoc) {
-
-  if (!checkFailClauseParameter(Parameter)) {
-    Diag(KindLoc, diag::err_omp_atomic_fail_wrong_or_no_clauses);
-    return nullptr;
-  }
-  return new (Context)
-      OMPFailClause(Parameter, KindLoc, StartLoc, LParenLoc, EndLoc);
-}
-
 OMPClause *Sema::ActOnOpenMPSeqCstClause(SourceLocation StartLoc,
                                          SourceLocation EndLoc) {
   return new (Context) OMPSeqCstClause(StartLoc, EndLoc);

clang/lib/Sema/TreeTransform.h

@@ -9866,12 +9866,6 @@ TreeTransform<Derived>::TransformOMPCompareClause(OMPCompareClause *C) {
   return C;
 }
 
-template <typename Derived>
-OMPClause *TreeTransform<Derived>::TransformOMPFailClause(OMPFailClause *C) {
-  // No need to rebuild this clause, no template-dependent parameters.
-  return C;
-}
-
 template <typename Derived>
 OMPClause *
 TreeTransform<Derived>::TransformOMPSeqCstClause(OMPSeqCstClause *C) {

clang/lib/Serialization/ASTReader.cpp

@@ -10276,9 +10276,6 @@ OMPClause *OMPClauseReader::readClause() {
   case llvm::omp::OMPC_compare:
     C = new (Context) OMPCompareClause();
     break;
-  case llvm::omp::OMPC_fail:
-    C = new (Context) OMPFailClause();
-    break;
   case llvm::omp::OMPC_seq_cst:
     C = new (Context) OMPSeqCstClause();
     break;
@@ -10672,16 +10669,6 @@ void OMPClauseReader::VisitOMPCaptureClause(OMPCaptureClause *) {}
 
 void OMPClauseReader::VisitOMPCompareClause(OMPCompareClause *) {}
 
-// Read the parameter of fail clause. This will have been saved when
-// OMPClauseWriter is called.
-void OMPClauseReader::VisitOMPFailClause(OMPFailClause *C) {
-  C->setLParenLoc(Record.readSourceLocation());
-  SourceLocation FailParameterLoc = Record.readSourceLocation();
-  C->setFailParameterLoc(FailParameterLoc);
-  OpenMPClauseKind CKind = Record.readEnum<OpenMPClauseKind>();
-  C->setFailParameter(CKind);
-}
-
 void OMPClauseReader::VisitOMPSeqCstClause(OMPSeqCstClause *) {}
 
 void OMPClauseReader::VisitOMPAcqRelClause(OMPAcqRelClause *) {}

clang/lib/Serialization/ASTWriter.cpp

@@ -6622,13 +6622,6 @@ void OMPClauseWriter::VisitOMPCaptureClause(OMPCaptureClause *) {}
 
 void OMPClauseWriter::VisitOMPCompareClause(OMPCompareClause *) {}
 
-// Save the parameter of fail clause.
-void OMPClauseWriter::VisitOMPFailClause(OMPFailClause *C) {
-  Record.AddSourceLocation(C->getLParenLoc());
-  Record.AddSourceLocation(C->getFailParameterLoc());
-  Record.writeEnum(C->getFailParameter());
-}
-
 void OMPClauseWriter::VisitOMPSeqCstClause(OMPSeqCstClause *) {}
 
 void OMPClauseWriter::VisitOMPAcqRelClause(OMPAcqRelClause *) {}