[OpenACC][CIR] Basic infrastructure for OpenACC lowering (#134717)

This is the first of a few patches that will do infrastructure work to
enable the OpenACC lowering via the OpenACC dialect.

At the moment this just gets the various function calls that will end up
generating OpenACC, plus some tests to validate that we're doing the
diagnostics in OpenACC specific locations.

Additionally, this adds Stmt and Decl files for CIRGen.

1 files changed, 49 insertions, 0 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 572c71e..cfc5c06 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -4674,6 +4674,51 @@ static bool isStrictlyPreprocessorAction(frontend::ActionKind Action) {
   llvm_unreachable("invalid frontend action");
 }
 
+static bool isCodeGenAction(frontend::ActionKind Action) {
+  switch (Action) {
+  case frontend::EmitAssembly:
+  case frontend::EmitBC:
+  case frontend::EmitCIR:
+  case frontend::EmitHTML:
+  case frontend::EmitLLVM:
+  case frontend::EmitLLVMOnly:
+  case frontend::EmitCodeGenOnly:
+  case frontend::EmitObj:
+  case frontend::GenerateModule:
+  case frontend::GenerateModuleInterface:
+  case frontend::GenerateReducedModuleInterface:
+  case frontend::GenerateHeaderUnit:
+  case frontend::GeneratePCH:
+  case frontend::GenerateInterfaceStubs:
+    return true;
+  case frontend::ASTDeclList:
+  case frontend::ASTDump:
+  case frontend::ASTPrint:
+  case frontend::ASTView:
+  case frontend::ExtractAPI:
+  case frontend::FixIt:
+  case frontend::ParseSyntaxOnly:
+  case frontend::ModuleFileInfo:
+  case frontend::VerifyPCH:
+  case frontend::PluginAction:
+  case frontend::RewriteObjC:
+  case frontend::RewriteTest:
+  case frontend::RunAnalysis:
+  case frontend::TemplightDump:
+  case frontend::DumpCompilerOptions:
+  case frontend::DumpRawTokens:
+  case frontend::DumpTokens:
+  case frontend::InitOnly:
+  case frontend::PrintPreamble:
+  case frontend::PrintPreprocessedInput:
+  case frontend::RewriteMacros:
+  case frontend::RunPreprocessorOnly:
+  case frontend::PrintDependencyDirectivesSourceMinimizerOutput:
+    return false;
+  }
+  llvm_unreachable("invalid frontend action");
+}
+
 static void GeneratePreprocessorArgs(const PreprocessorOptions &Opts,
                                      ArgumentConsumer Consumer,
                                      const LangOptions &LangOpts,
@@ -5001,6 +5046,10 @@ bool CompilerInvocation::CreateFromArgsImpl(
       Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
   }
 
+  if (LangOpts.OpenACC && !Res.getFrontendOpts().UseClangIRPipeline &&
+      isCodeGenAction(Res.getFrontendOpts().ProgramAction))
+    Diags.Report(diag::warn_drv_openacc_without_cir);
+
   // Set the triple of the host for OpenMP device compile.
   if (LangOpts.OpenMPIsTargetDevice)
     Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;