[Mlir-commits] [mlir] [mlir][nvvm] Introduce `fence.mbarrier.init` (PR #74058)

[Guray Ozen]

https://github.com/grypp created https://github.com/llvm/llvm-project/pull/74058

This PR introduce `fence.mbarrier.init` OP

>From 9f35504e81246f97a9d8c14a06043685660ae15e Mon Sep 17 00:00:00 2001
From: Guray Ozen <guray.ozen at gmail.com>
Date: Fri, 1 Dec 2023 11:10:40 +0100
Subject: [PATCH] [mlir][nvvm] Introduce `fence.mbarrier.init`

This PR introduce `fence.mbarrier.init` OP
---
 mlir/include/mlir/Dialect/LLVMIR/NVVMOps.td       | 10 ++++++++++
 mlir/test/Conversion/NVVMToLLVM/nvvm-to-llvm.mlir |  8 ++++++++
 2 files changed, 18 insertions(+)

diff --git a/mlir/include/mlir/Dialect/LLVMIR/NVVMOps.td b/mlir/include/mlir/Dialect/LLVMIR/NVVMOps.td
index ecad1a16eb6c590..f400c18b5f32cf7 100644
--- a/mlir/include/mlir/Dialect/LLVMIR/NVVMOps.td
+++ b/mlir/include/mlir/Dialect/LLVMIR/NVVMOps.td
@@ -422,6 +422,16 @@ def NVVM_SetMaxRegisterOp : NVVM_PTXBuilder_Op<"setmaxregister"> {
   let hasVerifier = 1;
 }
 
+def NVVM_FenceMbarrierInitOp : NVVM_PTXBuilder_Op<"fence.mbarrier.init"> {
+  let arguments = (ins );
+  let assemblyFormat = "attr-dict";
+  let extraClassDefinition = [{        
+    std::string $cppClass::getPtx() {
+      return std::string("fence.mbarrier_init.release.cluster;");
+    }
+  }];
+}
+
 def ShflKindBfly : I32EnumAttrCase<"bfly", 0>;
 def ShflKindUp   : I32EnumAttrCase<"up", 1>;
 def ShflKindDown : I32EnumAttrCase<"down", 2>;
diff --git a/mlir/test/Conversion/NVVMToLLVM/nvvm-to-llvm.mlir b/mlir/test/Conversion/NVVMToLLVM/nvvm-to-llvm.mlir
index 5482cc194192ddb..8366f1d109b1c73 100644
--- a/mlir/test/Conversion/NVVMToLLVM/nvvm-to-llvm.mlir
+++ b/mlir/test/Conversion/NVVMToLLVM/nvvm-to-llvm.mlir
@@ -629,3 +629,11 @@ func.func @cp_bulk_commit() {
   nvvm.cp.async.bulk.commit.group
   func.return
 }
+
+// -----
+
+func.func @fence_mbarrier_init() {
+  //CHECK: llvm.inline_asm has_side_effects asm_dialect = att "fence.mbarrier_init.release.cluster;"
+  nvvm.fence.mbarrier.init
+  func.return
+}