[flang-commits] [flang] [flang][cuda][NFC] Use the NVVM op for syncwarp (PR #166695)

[Valentin Clement バレンタイン クレメン via flang-commits]

https://github.com/clementval created https://github.com/llvm/llvm-project/pull/166695

None

>From 2f3f1d1b421835a9e228072ddad70e3f1afe07fc Mon Sep 17 00:00:00 2001
From: Valentin Clement <clementval at gmail.com>
Date: Wed, 5 Nov 2025 20:06:20 -0800
Subject: [PATCH] [flang][cuda][NFC] Use the NVVM op for syncwarp

---
 flang/lib/Optimizer/Builder/CUDAIntrinsicCall.cpp | 8 +-------
 flang/test/Lower/CUDA/cuda-device-proc.cuf        | 4 ++--
 2 files changed, 3 insertions(+), 9 deletions(-)

diff --git a/flang/lib/Optimizer/Builder/CUDAIntrinsicCall.cpp b/flang/lib/Optimizer/Builder/CUDAIntrinsicCall.cpp
index 6312e61f5e62a..4c0d266428632 100644
--- a/flang/lib/Optimizer/Builder/CUDAIntrinsicCall.cpp
+++ b/flang/lib/Optimizer/Builder/CUDAIntrinsicCall.cpp
@@ -1122,13 +1122,7 @@ CUDAIntrinsicLibrary::genSyncThreadsOr(mlir::Type resultType,
 void CUDAIntrinsicLibrary::genSyncWarp(
     llvm::ArrayRef<fir::ExtendedValue> args) {
   assert(args.size() == 1);
-  constexpr llvm::StringLiteral funcName = "llvm.nvvm.bar.warp.sync";
-  mlir::Value mask = fir::getBase(args[0]);
-  mlir::FunctionType funcType =
-      mlir::FunctionType::get(builder.getContext(), {mask.getType()}, {});
-  auto funcOp = builder.createFunction(loc, funcName, funcType);
-  llvm::SmallVector<mlir::Value> argsList{mask};
-  fir::CallOp::create(builder, loc, funcOp, argsList);
+  mlir::NVVM::SyncWarpOp::create(builder, loc, fir::getBase(args[0]));
 }
 
 // THIS_GRID
diff --git a/flang/test/Lower/CUDA/cuda-device-proc.cuf b/flang/test/Lower/CUDA/cuda-device-proc.cuf
index 2d2c801b48f4d..9f8f74a0c7b5e 100644
--- a/flang/test/Lower/CUDA/cuda-device-proc.cuf
+++ b/flang/test/Lower/CUDA/cuda-device-proc.cuf
@@ -105,7 +105,7 @@ end
 
 ! CHECK-LABEL: func.func @_QPdevsub() attributes {cuf.proc_attr = #cuf.cuda_proc<global>}
 ! CHECK: nvvm.barrier0
-! CHECK: fir.call @llvm.nvvm.bar.warp.sync(%c1{{.*}}) fastmath<contract> : (i32) -> ()
+! CHECK: nvvm.bar.warp.sync %c1{{.*}} : i32 
 ! CHECK: fir.call @llvm.nvvm.membar.gl() fastmath<contract> : () -> ()
 ! CHECK: fir.call @llvm.nvvm.membar.cta() fastmath<contract> : () -> ()
 ! CHECK: fir.call @llvm.nvvm.membar.sys() fastmath<contract> : () -> ()
@@ -219,7 +219,7 @@ end
 ! CHECK-LABEL: func.func @_QPhost1()
 ! CHECK: cuf.kernel
 ! CHECK: nvvm.barrier0
-! CHECK: fir.call @llvm.nvvm.bar.warp.sync(%c1{{.*}}) fastmath<contract> : (i32) -> ()
+! CHECK: nvvm.bar.warp.sync %c1{{.*}} : i32 
 ! CHECK: fir.call @llvm.nvvm.barrier0.and(%c1{{.*}}) fastmath<contract> : (i32) -> i32
 ! CHECK: fir.call @llvm.nvvm.barrier0.popc(%c1{{.*}}) fastmath<contract> : (i32) -> i32
 ! CHECK: fir.call @llvm.nvvm.barrier0.or(%c1{{.*}}) fastmath<contract> : (i32) -> i32