[Frontend][OpenMP] Add 6.1 as a valid OpenMP version (#153628)

Co-authored-by: Michael Klemm <[email protected]>

Author: kparzysz

flang/lib/Frontend/CompilerInvocation.cpp

@@ -1187,6 +1187,7 @@ static bool parseOpenMPArgs(CompilerInvocation &res, llvm::opt::ArgList &args,
   llvm::Triple t(res.getTargetOpts().triple);
 
   constexpr unsigned newestFullySupported = 31;
+  constexpr unsigned latestFinalized = 60;
   // By default OpenMP is set to the most recent fully supported version
   res.getLangOpts().OpenMPVersion = newestFullySupported;
   res.getFrontendOpts().features.Enable(
@@ -1209,12 +1210,26 @@ static bool parseOpenMPArgs(CompilerInvocation &res, llvm::opt::ArgList &args,
       diags.Report(diagID) << value << arg->getAsString(args) << versions.str();
     };
 
+    auto reportFutureVersion = [&](llvm::StringRef value) {
+      const unsigned diagID = diags.getCustomDiagID(
+          clang::DiagnosticsEngine::Warning,
+          "The specification for OpenMP version %0 is still under development; "
+          "the syntax and semantics of new features may be subject to change");
+      std::string buffer;
+      llvm::raw_string_ostream versions(buffer);
+      llvm::interleaveComma(ompVersions, versions);
+
+      diags.Report(diagID) << value;
+    };
+
     llvm::StringRef value = arg->getValue();
     if (!value.getAsInteger(/*radix=*/10, version)) {
       if (llvm::is_contained(ompVersions, version)) {
         res.getLangOpts().OpenMPVersion = version;
 
-        if (version > newestFullySupported)
+        if (version > latestFinalized)
+          reportFutureVersion(value);
+        else if (version > newestFullySupported)
           diags.Report(clang::diag::warn_openmp_incomplete) << version;
       } else if (llvm::is_contained(oldVersions, version)) {
         const unsigned diagID =

flang/test/Driver/fopenmp-version.F90

@@ -22,4 +22,8 @@
 
 !RUN: not %flang -c -fopenmp -fopenmp-version=29 %s 2>&1 | FileCheck --check-prefix=ERR-BAD %s
 
-!ERR-BAD: error: '29' is not a valid OpenMP version in '-fopenmp-version=29', valid versions are 31, 40, 45, 50, 51, 52, 60
+!ERR-BAD: error: '29' is not a valid OpenMP version in '-fopenmp-version=29', valid versions are 31, 40, 45, 50, 51, 52, 60, 61
+
+!RUN: %flang -c -fopenmp -fopenmp-version=61 %s 2>&1 | FileCheck --check-prefix=FUTURE %s
+
+!FUTURE: The specification for OpenMP version 61 is still under development; the syntax and semantics of new features may be subject to change

llvm/lib/Frontend/OpenMP/OMP.cpp

@@ -190,7 +190,7 @@ bool isCombinedConstruct(Directive D) {
 }
 
 ArrayRef<unsigned> getOpenMPVersions() {
-  static unsigned Versions[]{31, 40, 45, 50, 51, 52, 60};
+  static unsigned Versions[]{31, 40, 45, 50, 51, 52, 60, 61};
   return Versions;
 }