[llvm] [KernelInfo] Implement new LLVM IR pass for GPU code analysis (PR #102944)

[Johannes Doerfert via llvm-commits]

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@@ -0,0 +1,350 @@
+//===- KernelInfo.cpp - Kernel Analysis -----------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the KernelInfo, KernelInfoAnalysis, and KernelInfoPrinter
+// classes used to extract function properties from a kernel.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Analysis/KernelInfo.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Analysis/OptimizationRemarkEmitter.h"
+#include "llvm/IR/DebugInfo.h"
+#include "llvm/IR/Dominators.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/Metadata.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/PassManager.h"
+#include "llvm/Passes/PassBuilder.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "kernel-info"
+
+static bool isKernelFunction(Function &F) {
+  // TODO: Is this general enough?  Consider languages beyond OpenMP.
+  return F.hasFnAttribute("kernel");
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jdoerfert wrote:

Can you move this code to some generic location and use it:
https://github.com/llvm/llvm-project/blob/b6960e2a631df38c076cee2845978b0606cea066/llvm/lib/Transforms/IPO/OpenMPOpt.cpp#L5912

https://github.com/llvm/llvm-project/pull/102944