[flang-commits] [clang] [flang] [flang][OpenMP] Upstream first part of `do concurrent` mapping (PR #126026)

[Kareem Ergawy via flang-commits]

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@@ -0,0 +1,104 @@
+//===- DoConcurrentConversion.cpp -- map `DO CONCURRENT` to OpenMP loops --===//
+//
+// 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/Optimizer/Dialect/FIROps.h"
+#include "flang/Optimizer/OpenMP/Passes.h"
+#include "mlir/Dialect/Func/IR/FuncOps.h"
+#include "mlir/Dialect/OpenMP/OpenMPDialect.h"
+#include "mlir/IR/Diagnostics.h"
+#include "mlir/Pass/Pass.h"
+#include "mlir/Transforms/DialectConversion.h"
+
+#include <memory>
+#include <utility>
+
+namespace flangomp {
+#define GEN_PASS_DEF_DOCONCURRENTCONVERSIONPASS
+#include "flang/Optimizer/OpenMP/Passes.h.inc"
+} // namespace flangomp
+
+#define DEBUG_TYPE "do-concurrent-conversion"
+#define DBGS() (llvm::dbgs() << "[" DEBUG_TYPE << "]: ")
+
+namespace {
+class DoConcurrentConversion : public mlir::OpConversionPattern<fir::DoLoopOp> {
+public:
+  using mlir::OpConversionPattern<fir::DoLoopOp>::OpConversionPattern;
+
+  DoConcurrentConversion(mlir::MLIRContext *context, bool mapToDevice,
+                         llvm::DenseSet<fir::DoLoopOp> &concurrentLoopsToSkip)
+      : OpConversionPattern(context), mapToDevice(mapToDevice),
+        concurrentLoopsToSkip(concurrentLoopsToSkip) {}
+
+  mlir::LogicalResult
+  matchAndRewrite(fir::DoLoopOp doLoop, OpAdaptor adaptor,
+                  mlir::ConversionPatternRewriter &rewriter) const override {
+    return mlir::success();
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ergawy wrote:

Not in a hurry to merge it, we can wait until the pass has enough functionality to do something actual transformation. Opened the next PR for review: https://github.com/llvm/llvm-project/pull/127478.

https://github.com/llvm/llvm-project/pull/126026