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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.
32 lines
1.5 KiB
Plaintext
32 lines
1.5 KiB
Plaintext
// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -fcuda-is-device -fapply-global-visibility-to-externs -fvisibility=default -emit-llvm -o - %s | FileCheck --check-prefix=CHECK-DEFAULT %s
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// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -fcuda-is-device -fapply-global-visibility-to-externs -fvisibility=protected -emit-llvm -o - %s | FileCheck --check-prefix=CHECK-PROTECTED %s
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// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -fcuda-is-device -fapply-global-visibility-to-externs -fvisibility=hidden -emit-llvm -o - %s | FileCheck --check-prefix=CHECK-HIDDEN %s
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#include "Inputs/cuda.h"
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// CHECK-DEFAULT: @c ={{.*}} addrspace(4) externally_initialized constant
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// CHECK-DEFAULT: @g ={{.*}} addrspace(1) externally_initialized global
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// CHECK-PROTECTED: @c = protected addrspace(4) externally_initialized constant
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// CHECK-PROTECTED: @g = protected addrspace(1) externally_initialized global
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// CHECK-HIDDEN: @c = protected addrspace(4) externally_initialized constant
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// CHECK-HIDDEN: @g = protected addrspace(1) externally_initialized global
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__constant__ int c;
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__device__ int g;
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// CHECK-DEFAULT: @e = external addrspace(1) global
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// CHECK-PROTECTED: @e = external protected addrspace(1) global
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// CHECK-HIDDEN: @e = external protected addrspace(1) global
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extern __device__ int e;
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// dummy one to hold reference to `e`.
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__device__ int f() {
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return e;
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}
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// CHECK-DEFAULT: define{{.*}} amdgpu_kernel void @_Z3foov()
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// CHECK-PROTECTED: define protected amdgpu_kernel void @_Z3foov()
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// CHECK-HIDDEN: define protected amdgpu_kernel void @_Z3foov()
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__global__ void foo() {
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g = c;
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}
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