[NFC][flang] Move ReductionProcessor to Lower/Support. (#146025)

With #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:
- #145837
- #146025 (this one)
- #146028
- #146033

Author: ergawy

flang/lib/Lower/OpenMP/Clauses.h renamed to flang/include/flang/Lower/OpenMP/Clauses.h

@@ -13,7 +13,7 @@
 #ifndef FORTRAN_LOWER_REDUCTIONPROCESSOR_H
 #define FORTRAN_LOWER_REDUCTIONPROCESSOR_H
 
-#include "Clauses.h"
+#include "flang/Lower/OpenMP/Clauses.h"
 #include "flang/Optimizer/Builder/FIRBuilder.h"
 #include "flang/Optimizer/Dialect/FIRType.h"
 #include "flang/Parser/parse-tree.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

@@ -7,13 +7,13 @@
 //===----------------------------------------------------------------------===//
 
 #include "Atomic.h"
-#include "Clauses.h"
 #include "flang/Evaluate/expression.h"
 #include "flang/Evaluate/fold.h"
 #include "flang/Evaluate/tools.h"
 #include "flang/Evaluate/traverse.h"
 #include "flang/Evaluate/type.h"
 #include "flang/Lower/AbstractConverter.h"
+#include "flang/Lower/OpenMP/Clauses.h"
 #include "flang/Lower/PFTBuilder.h"
 #include "flang/Lower/StatementContext.h"
 #include "flang/Lower/SymbolMap.h"

flang/lib/Lower/OpenMP/Atomic.cpp

@@ -12,7 +12,7 @@
 #ifndef FORTRAN_LOWER_CLAUSEFINDER_H
 #define FORTRAN_LOWER_CLAUSEFINDER_H
 
-#include "Clauses.h"
+#include "flang/Lower/OpenMP/Clauses.h"
 
 namespace Fortran {
 namespace lower {

flang/lib/Lower/OpenMP/ClauseFinder.h

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

flang/lib/Lower/OpenMP/ClauseProcessor.cpp

@@ -13,11 +13,11 @@
 #define FORTRAN_LOWER_CLAUSEPROCESSOR_H
 
 #include "ClauseFinder.h"
-#include "Clauses.h"
 #include "Utils.h"
 #include "flang/Lower/AbstractConverter.h"
 #include "flang/Lower/Bridge.h"
 #include "flang/Lower/DirectivesCommon.h"
+#include "flang/Lower/OpenMP/Clauses.h"
 #include "flang/Optimizer/Builder/Todo.h"
 #include "flang/Parser/dump-parse-tree.h"
 #include "flang/Parser/parse-tree.h"

flang/lib/Lower/OpenMP/ClauseProcessor.h

@@ -6,7 +6,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "Clauses.h"
+#include "flang/Lower/OpenMP/Clauses.h"
 
 #include "flang/Common/idioms.h"
 #include "flang/Evaluate/expression.h"

flang/lib/Lower/OpenMP/Clauses.cpp

@@ -12,9 +12,9 @@
 #ifndef FORTRAN_LOWER_DATASHARINGPROCESSOR_H
 #define FORTRAN_LOWER_DATASHARINGPROCESSOR_H
 
-#include "Clauses.h"
 #include "flang/Lower/AbstractConverter.h"
 #include "flang/Lower/OpenMP.h"
+#include "flang/Lower/OpenMP/Clauses.h"
 #include "flang/Optimizer/Builder/FIRBuilder.h"
 #include "flang/Parser/parse-tree.h"
 #include "flang/Semantics/symbol.h"