[NFC][flang] Move ReductionProcessor to Lower/Support.

With llvm#145837, the `ReductionProcessor` component is now used by both OpenMP and `do concurrent`. Therefore, this PR moves it to a shared location: `flang/Lower/Support`.

PR stack:
- llvm#145837
- llvm#146025 (this one)
- llvm#146028
- llvm#146033

Author: ergawy

flang/include/flang/Lower/OpenMP/Utils.h

@@ -9,7 +9,7 @@
 #ifndef FORTRAN_LOWER_OPENMPUTILS_H
 #define FORTRAN_LOWER_OPENMPUTILS_H
 
-#include "Clauses.h"
+#include "flang/Lower/OpenMP/Clauses.h"
 #include "mlir/Dialect/OpenMP/OpenMPDialect.h"
 #include "mlir/IR/Location.h"
 #include "mlir/IR/Value.h"

flang/lib/Lower/OpenMP/ReductionProcessor.h renamed to flang/include/flang/Lower/Support/ReductionProcessor.h

@@ -12,7 +12,6 @@
 
 #include "flang/Lower/Bridge.h"
 
-#include "OpenMP/ReductionProcessor.h"
 #include "flang/Lower/Allocatable.h"
 #include "flang/Lower/CallInterface.h"
 #include "flang/Lower/Coarray.h"
@@ -32,6 +31,7 @@
 #include "flang/Lower/PFTBuilder.h"
 #include "flang/Lower/Runtime.h"
 #include "flang/Lower/StatementContext.h"
+#include "flang/Lower/Support/ReductionProcessor.h"
 #include "flang/Lower/Support/Utils.h"
 #include "flang/Optimizer/Builder/BoxValue.h"
 #include "flang/Optimizer/Builder/CUFCommon.h"

flang/lib/Lower/Bridge.cpp

@@ -29,11 +29,11 @@ add_flang_library(FortranLower
   OpenMP/DataSharingProcessor.cpp
   OpenMP/Decomposer.cpp
   OpenMP/OpenMP.cpp
-  OpenMP/ReductionProcessor.cpp
   OpenMP/Utils.cpp
   PFTBuilder.cpp
   Runtime.cpp
   Support/PrivateReductionUtils.cpp
+  Support/ReductionProcessor.cpp
   Support/Utils.cpp
   SymbolMap.cpp
   VectorSubscripts.cpp

flang/lib/Lower/CMakeLists.txt

@@ -12,11 +12,11 @@
 
 #include "ClauseProcessor.h"
 
-#include "ReductionProcessor.h"
 #include "flang/Lower/ConvertExprToHLFIR.h"
 #include "flang/Lower/OpenMP/Clauses.h"
 #include "flang/Lower/OpenMP/Utils.h"
 #include "flang/Lower/PFTBuilder.h"
+#include "flang/Lower/Support/ReductionProcessor.h"
 #include "flang/Parser/tools.h"
 #include "flang/Semantics/tools.h"
 #include "flang/Support/OpenMP-utils.h"

flang/lib/Lower/OpenMP/ClauseProcessor.cpp

@@ -10,7 +10,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "ReductionProcessor.h"
+#include "flang/Lower/Support/ReductionProcessor.h"
 
 #include "flang/Lower/AbstractConverter.h"
 #include "flang/Lower/ConvertType.h"