1 // Test for linking with CUDA's libdevice as outlined in 2 // http://llvm.org/docs/NVPTXUsage.html#linking-with-libdevice 3 // 4 // REQUIRES: nvptx-registered-target 5 // 6 // Prepare bitcode file to link with 7 // RUN: %clang_cc1 -triple nvptx-unknown-cuda -emit-llvm-bc -o %t.bc \ 8 // RUN: %S/Inputs/device-code.ll 9 // 10 // Make sure function in device-code gets linked in and internalized. 11 // RUN: %clang_cc1 -triple nvptx-unknown-cuda -fcuda-is-device \ 12 // RUN: -mlink-bitcode-file %t.bc -fcuda-uses-libdevice -emit-llvm \ 13 // RUN: -disable-llvm-passes -o - %s \ 14 // RUN: | FileCheck %s -check-prefix CHECK-IR 15 // 16 // Make sure function in device-code gets linked but is not internalized 17 // without -fcuda-uses-libdevice 18 // RUN: %clang_cc1 -triple nvptx-unknown-cuda -fcuda-is-device \ 19 // RUN: -mlink-bitcode-file %t.bc -emit-llvm \ 20 // RUN: -disable-llvm-passes -o - %s \ 21 // RUN: | FileCheck %s -check-prefix CHECK-IR-NLD 22 // 23 // Make sure NVVMReflect pass is enabled in NVPTX back-end. 24 // RUN: %clang_cc1 -triple nvptx-unknown-cuda -fcuda-is-device \ 25 // RUN: -mlink-bitcode-file %t.bc -fcuda-uses-libdevice -S -o /dev/null %s \ 26 // RUN: -backend-option -debug-pass=Structure 2>&1 \ 27 // RUN: | FileCheck %s -check-prefix CHECK-REFLECT 28 29 #include "Inputs/cuda.h" 30 31 __device__ float device_mul_or_add(float a, float b); 32 extern "C" __device__ double __nv_sin(double x); 33 extern "C" __device__ double __nv_exp(double x); 34 35 // CHECK-IR-LABEL: define void @_Z26should_not_be_internalizedPf( 36 // CHECK-PTX-LABEL: .visible .func _Z26should_not_be_internalizedPf( 37 __device__ void should_not_be_internalized(float *data) {} 38 39 // Make sure kernel call has not been internalized. 40 // CHECK-IR-LABEL: define void @_Z6kernelPfS_ 41 // CHECK-PTX-LABEL: .visible .entry _Z6kernelPfS_( 42 __global__ __attribute__((used)) void kernel(float *out, float *in) { 43 *out = device_mul_or_add(in[0], in[1]); 44 *out += __nv_exp(__nv_sin(*out)); 45 should_not_be_internalized(out); 46 } 47 48 // Make sure device_mul_or_add() is present in IR, is internal and 49 // calls __nvvm_reflect(). 50 // CHECK-IR-LABEL: define internal float @_Z17device_mul_or_addff( 51 // CHECK-IR-NLD-LABEL: define float @_Z17device_mul_or_addff( 52 // CHECK-IR: call i32 @__nvvm_reflect 53 // CHECK-IR: ret float 54 55 // Verify that NVVMReflect pass is among the passes run by NVPTX back-end. 56 // CHECK-REFLECT: Replace occurrences of __nvvm_reflect() calls with 0/1 57