[Flang][OpenMP] NFC: Flang OpenMP passes cleanup (#107386)

For consistency, this patch renames the `FunctionFiltering` pass to
`FunctionFilteringPass`. Also, OpenMP pass-related `#define`s are
removed from flang/Optimizer/Transforms/Passes.h, since `#define`s don't
have an effect there after moving related passes to
flang/Optimizer/OpenMP/Passes.td.

Author: skatrak

flang/include/flang/Optimizer/OpenMP/Passes.td

@@ -28,7 +28,7 @@ def MarkDeclareTargetPass
   let dependentDialects = ["mlir::omp::OpenMPDialect"];
 }
 
-def FunctionFiltering : Pass<"omp-function-filtering"> {
+def FunctionFilteringPass : Pass<"omp-function-filtering"> {
   let summary = "Filters out functions intended for the host when compiling "
                 "for the target device.";
   let dependentDialects = [

flang/include/flang/Optimizer/Transforms/Passes.h

@@ -53,9 +53,6 @@ namespace fir {
 #define GEN_PASS_DECL_STACKRECLAIM
 #define GEN_PASS_DECL_LOOPVERSIONING
 #define GEN_PASS_DECL_ADDALIASTAGS
-#define GEN_PASS_DECL_OMPMAPINFOFINALIZATIONPASS
-#define GEN_PASS_DECL_OMPMARKDECLARETARGETPASS
-#define GEN_PASS_DECL_OMPFUNCTIONFILTERING
 #define GEN_PASS_DECL_VSCALEATTR
 #define GEN_PASS_DECL_FUNCTIONATTR
 #define GEN_PASS_DECL_CONSTANTARGUMENTGLOBALISATIONOPT

flang/include/flang/Tools/CLOptions.inc

@@ -370,7 +370,7 @@ inline void createOpenMPFIRPassPipeline(
   pm.addPass(flangomp::createMapInfoFinalizationPass());
   pm.addPass(flangomp::createMarkDeclareTargetPass());
   if (isTargetDevice)
-    pm.addPass(flangomp::createFunctionFiltering());
+    pm.addPass(flangomp::createFunctionFilteringPass());
 }
 
 #if !defined(FLANG_EXCLUDE_CODEGEN)

flang/lib/Optimizer/OpenMP/FunctionFiltering.cpp

@@ -22,15 +22,15 @@
 #include "llvm/ADT/SmallVector.h"
 
 namespace flangomp {
-#define GEN_PASS_DEF_FUNCTIONFILTERING
+#define GEN_PASS_DEF_FUNCTIONFILTERINGPASS
 #include "flang/Optimizer/OpenMP/Passes.h.inc"
 } // namespace flangomp
 
 using namespace mlir;
 
 namespace {
 class FunctionFilteringPass
-    : public flangomp::impl::FunctionFilteringBase<FunctionFilteringPass> {
+    : public flangomp::impl::FunctionFilteringPassBase<FunctionFilteringPass> {
 public:
   FunctionFilteringPass() = default;