mirror of
https://github.com/NVIDIA/cuda-samples.git
synced 2024-10-06 22:19:17 +08:00
104 lines
4.1 KiB
LLVM
104 lines
4.1 KiB
LLVM
; Copyright (c) 2014-2023, NVIDIA CORPORATION. All rights reserved.
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;
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; Redistribution and use in source and binary forms, with or without
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; modification, are permitted provided that the following conditions
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; are met:
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; * Redistributions of source code must retain the above copyright
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; notice, this list of conditions and the following disclaimer.
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; * Redistributions in binary form must reproduce the above copyright
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; notice, this list of conditions and the following disclaimer in the
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; documentation and/or other materials provided with the distribution.
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; * Neither the name of NVIDIA CORPORATION nor the names of its
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; contributors may be used to endorse or promote products derived
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; from this software without specific prior written permission.
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;
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; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
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; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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; PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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; CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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; EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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; PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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; OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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; This NVVM IR program shows how to call cudaGetParameterBuffer and cudaLaunchDevice functions.
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; What it does is similar to the following CUDA C code.
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;
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; __global__ void kernel(int depth)
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; {
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; if (threadIdx.x == 0) {
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; printf("kernel launched, depth = %d\n", depth);
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; }
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;
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; __syncthreads();
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;
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; if (++depth > 3)
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; return;
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;
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; kernel<<<1,1>>>(depth);
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;
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; }
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-i128:128:128-f32:32:32-f64:64:64-v16:16:16-v32:32:32-v64:64:64-v128:128:128-n16:32:64"
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target triple = "nvptx64-nvidia-cuda"
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%struct.dim3 = type { i32, i32, i32 }
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%struct.CUstream_st = type opaque
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@"$str" = private addrspace(1) constant [29 x i8] c"kernel launched, depth = %d\0A\00"
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define void @kernel(i32 %depth) {
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entry:
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%tmp31 = alloca i32, align 8
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%gen2local = addrspacecast i32* %tmp31 to i32 addrspace(5)*
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%tmp31.sub = bitcast i32* %tmp31 to i8*
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%0 = call i32 @llvm.nvvm.read.ptx.sreg.tid.x()
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%cmp = icmp eq i32 %0, 0
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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%1 = addrspacecast i8 addrspace(1)* getelementptr inbounds ([29 x i8], [29 x i8] addrspace(1)* @"$str", i64 0, i64 0) to i8 addrspace(0)*
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store i32 %depth, i32 addrspace(5)* %gen2local, align 8
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%call = call i32 @vprintf(i8* %1, i8* %tmp31.sub)
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br label %if.end
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if.end: ; preds = %if.then, %entry
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call void @llvm.cuda.syncthreads()
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%inc = add nsw i32 %depth, 1
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%cmp5 = icmp sgt i32 %inc, 3
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br i1 %cmp5, label %return, label %if.end7
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if.end7: ; preds = %if.end
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%call15 = call i8* @cudaGetParameterBufferV2(i8* bitcast (void (i32)* @kernel to i8*), %struct.dim3 { i32 1, i32 1, i32 1 }, %struct.dim3 { i32 1, i32 1, i32 1 }, i32 0)
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%tobool = icmp eq i8* %call15, null
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br i1 %tobool, label %return, label %cond.true
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cond.true: ; preds = %if.end7
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%conv = bitcast i8* %call15 to i32*
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store i32 %inc, i32* %conv, align 4
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%call20 = call i32 @cudaLaunchDeviceV2(i8* %call15, %struct.CUstream_st* null)
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br label %return
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return: ; preds = %cond.true, %if.end7, %if.end
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ret void
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}
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declare i32 @llvm.nvvm.read.ptx.sreg.tid.x() nounwind readnone
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declare i32 @vprintf(i8* nocapture, i8*) nounwind
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declare void @llvm.cuda.syncthreads() nounwind
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declare i8* @cudaGetParameterBufferV2(i8*, %struct.dim3, %struct.dim3, i32)
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declare i32 @cudaLaunchDeviceV2(i8*, %struct.CUstream_st*)
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!nvvm.annotations = !{!0}
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!0 = !{void (i32)* @kernel, !"kernel", i32 1}
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!nvvmir.version = !{!1}
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!1 = !{i32 2, i32 0}
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