[flang-commits] [flang] [flang][OpenMP] Rewrite `omp.loop` to semantically equivalent ops (PR #115443)

[Kiran Chandramohan via flang-commits]

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@@ -0,0 +1,168 @@
+//===- GenericLoopConversion.cpp ------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "flang/Common/OpenMP-utils.h"
+#include "flang/Optimizer/Dialect/FIRDialect.h"
+#include "flang/Optimizer/HLFIR/HLFIRDialect.h"
+#include "flang/Optimizer/OpenMP/Passes.h"
+#include "flang/Semantics/symbol.h"
+
+#include "mlir/Dialect/ControlFlow/IR/ControlFlowOps.h"
+#include "mlir/Dialect/Math/IR/Math.h"
+#include "mlir/Dialect/OpenMP/OpenMPDialect.h"
+#include "mlir/IR/IRMapping.h"
+#include "mlir/Transforms/DialectConversion.h"
+
+#include <memory>
+
+namespace flangomp {
+#define GEN_PASS_DEF_GENERICLOOPCONVERSIONPASS
+#include "flang/Optimizer/OpenMP/Passes.h.inc"
+} // namespace flangomp
+
+namespace {
+
+/// A conversion pattern to handle various combined forms of `omp.loop`. For how
+/// combined/composite directive are handled see:
+/// https://discourse.llvm.org/t/rfc-representing-combined-composite-constructs-in-the-openmp-dialect/76986.
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kiranchandramohan wrote:

I thought this pass would be in the MLIR directory. Is there any reason for it to be not there?

https://github.com/llvm/llvm-project/pull/115443