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e203a67f4c
Currently, `__constant__` variables do not get unconditionally marked as `constant` in IR, which seems a bit odd given their definition. This is generally inconsequential for NVPTX/AMDGPU, since said variables get emitted in the constant address space for those BEs. However, it is potentially significant for e.g. HIP-on-SPIR-V cases, as SPIR-V does not allow casts to/from the constant AS (`UniformConstant`), which forces `__constant__` variables to be emitted in the global AS, thus making IR constness meaningful.
98 lines
3.8 KiB
Plaintext
98 lines
3.8 KiB
Plaintext
// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -fcuda-is-device -cuid=abc \
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// RUN: -aux-triple x86_64-unknown-linux-gnu -std=c++17 -fgpu-rdc \
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// RUN: -emit-llvm -o - -x hip %s > %t.dev
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// RUN: %clang_cc1 -triple x86_64-gnu-linux -cuid=abc \
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// RUN: -aux-triple amdgcn-amd-amdhsa -std=c++17 -fgpu-rdc \
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// RUN: -emit-llvm -o - -x hip %s > %t.host
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// RUN: cat %t.dev %t.host | FileCheck -check-prefixes=HIP,COMMON %s
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// RUN: cat %t.dev %t.host | FileCheck -check-prefixes=COMNEG %s
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// RUN: echo "GPU binary" > %t.fatbin
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// RUN: %clang_cc1 -triple nvptx -fcuda-is-device -cuid=abc \
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// RUN: -aux-triple x86_64-unknown-linux-gnu -std=c++17 -fgpu-rdc \
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// RUN: -emit-llvm -o - %s > %t.dev
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// RUN: %clang_cc1 -triple x86_64-gnu-linux -cuid=abc \
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// RUN: -aux-triple nvptx -std=c++17 -fgpu-rdc -fcuda-include-gpubinary %t.fatbin \
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// RUN: -emit-llvm -o - %s > %t.host
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// RUN: cat %t.dev %t.host | FileCheck -check-prefixes=CUDA,COMMON %s
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// RUN: cat %t.dev %t.host | FileCheck -check-prefixes=COMNEG %s
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#include "Inputs/cuda.h"
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// HIP-DAG: define weak_odr {{.*}}void @[[KERN:_ZN12_GLOBAL__N_16kernelEv\.intern\.b04fd23c98500190]](
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// HIP-DAG: define weak_odr {{.*}}void @[[KTX:_Z2ktIN12_GLOBAL__N_11XEEvT_\.intern\.b04fd23c98500190]](
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// HIP-DAG: define weak_odr {{.*}}void @[[KTL:_Z2ktIN12_GLOBAL__N_1UlvE_EEvT_\.intern\.b04fd23c98500190]](
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// HIP-DAG: @[[VM:_ZN12_GLOBAL__N_12vmE\.static\.b04fd23c98500190]] = addrspace(1) externally_initialized global
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// HIP-DAG: @[[VC:_ZN12_GLOBAL__N_12vcE\.static\.b04fd23c98500190]] = addrspace(4) externally_initialized constant
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// HIP-DAG: @[[VT:_Z2vtIN12_GLOBAL__N_11XEE\.static\.b04fd23c98500190]] = addrspace(1) externally_initialized global
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// CUDA-DAG: define weak_odr {{.*}}void @[[KERN:_ZN12_GLOBAL__N_16kernelEv__intern__b04fd23c98500190]](
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// CUDA-DAG: define weak_odr {{.*}}void @[[KTX:_Z2ktIN12_GLOBAL__N_11XEEvT___intern__b04fd23c98500190]](
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// CUDA-DAG: define weak_odr {{.*}}void @[[KTL:_Z2ktIN12_GLOBAL__N_1UlvE_EEvT___intern__b04fd23c98500190]](
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// CUDA-DAG: @[[VC:_ZN12_GLOBAL__N_12vcE__static__b04fd23c98500190]] = addrspace(4) externally_initialized constant
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// CUDA-DAG: @[[VT:_Z2vtIN12_GLOBAL__N_11XEE__static__b04fd23c98500190]] = addrspace(1) externally_initialized global
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// COMMON-DAG: @_ZN12_GLOBAL__N_12vdE = internal addrspace(1) global
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// COMNEG-NOT: @{{.*}} = {{.*}} c"_ZN12_GLOBAL__N_12vdE{{.*}}\00"
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// HIP-DAG: @llvm.compiler.used = {{.*}}@[[VM]]{{.*}}@[[VT]]{{.*}}@[[VC]]
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// CUDA-DAG: @llvm.compiler.used = {{.*}}@[[VT]]{{.*}}@[[VC]]
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// COMMON-DAG: @[[KERNSTR:.*]] = {{.*}} c"[[KERN]]\00"
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// COMMON-DAG: @[[KTXSTR:.*]] = {{.*}} c"[[KTX]]\00"
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// COMMON-DAG: @[[KTLSTR:.*]] = {{.*}} c"[[KTL]]\00"
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// HIP-DAG: @[[VMSTR:.*]] = {{.*}} c"[[VM]]\00"
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// COMMON-DAG: @[[VCSTR:.*]] = {{.*}} c"[[VC]]\00"
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// COMMON-DAG: @[[VTSTR:.*]] = {{.*}} c"[[VT]]\00"
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// COMMON-DAG: call i32 @__{{.*}}RegisterFunction({{.*}}@[[KERNSTR]]
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// COMMON-DAG: call i32 @__{{.*}}RegisterFunction({{.*}}@[[KTXSTR]]
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// COMMON-DAG: call i32 @__{{.*}}RegisterFunction({{.*}}@[[KTLSTR]]
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// HIP-DAG: call void @__{{.*}}RegisterManagedVar({{.*}}@[[VMSTR]]
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// COMMON-DAG: call void @__{{.*}}RegisterVar({{.*}}@[[VCSTR]]
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// COMMON-DAG: call void @__{{.*}}RegisterVar({{.*}}@[[VTSTR]]
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template <typename T>
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__global__ void kt(T x) {}
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template <typename T>
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__device__ T vt;
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namespace {
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struct X {};
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X x;
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auto lambda = [](){};
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#if __HIP__
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__managed__ int vm = 1;
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#endif
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__constant__ int vc = 2;
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// C should not be externalized since it is used by device code only.
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__device__ int vd = 3;
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__global__ void kernel() { vd = 4; }
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}
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template<typename T>
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void getSymbol(T *x) {}
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void test() {
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kernel<<<1, 1>>>();
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kt<<<1, 1>>>(x);
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kt<<<1, 1>>>(lambda);
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// A, B, and tempVar<X> should be externalized since they are
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// used by host code.
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#if __HIP__
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getSymbol(&vm);
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#endif
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getSymbol(&vc);
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getSymbol(&vt<X>);
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}
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