[llvm] Enabling Intel GPU Integration. (PR #65539)

[Mehdi Amini via llvm-commits]

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@@ -0,0 +1,70 @@
+//===- SerializeToSPIRV.cpp - Convert GPU kernel to SPIRV blob -------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This pass iterates all the SPIR-V modules in the top module and serializes
+/// each SPIR-V module to SPIR-V binary and then attachs the binary blob as a
+/// string attribute to the corresponding gpu module.
+///
+//===----------------------------------------------------------------------===//
+
+#include "mlir/Dialect/GPU/Transforms/Passes.h"
+
+#include "mlir/Dialect/GPU/IR/GPUDialect.h"
+#include "mlir/Dialect/GPU/Transforms/Passes.h"
+#include "mlir/Dialect/SPIRV/IR/SPIRVDialect.h"
+#include "mlir/Dialect/SPIRV/IR/SPIRVOps.h"
+#include "mlir/Target/SPIRV/Serialization.h"
+
+namespace mlir {
+#define GEN_PASS_DEF_GPUSERIALIZETOSPIRVPASS
+#include "mlir/Dialect/GPU/Transforms/Passes.h.inc"
+} // namespace mlir
+
+using namespace mlir;
+
+struct GpuSerializeToSPIRVPass : public mlir::impl::GpuSerializeToSPIRVPassBase<GpuSerializeToSPIRVPass> {
+public:
+  void runOnOperation() override {
+    auto mod = getOperation();
+    llvm::SmallVector<uint32_t, 0> spvBinary;
+    for (mlir::gpu::GPUModuleOp gpuMod : mod.getOps<gpu::GPUModuleOp>()) {
+      auto name = gpuMod.getName();
+      // check that the spv module has the same name with gpu module except the
+      // prefix "__spv__"
+      auto isSameMod = [&](spirv::ModuleOp spvMod) -> bool {
+        auto spvModName = spvMod.getName();
+        return spvModName->consume_front("__spv__") && spvModName == name;
+      };
+      auto spvMods = mod.getOps<spirv::ModuleOp>();
+      auto it = llvm::find_if(spvMods, isSameMod);
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joker-eph wrote:

This is really costly, can you build a symbol table once at the beginning of the function and use it for the queries instead?

https://github.com/llvm/llvm-project/pull/65539