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.
57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
// RUN: %clang_cc1 -triple spirv64 -x hip -emit-llvm -fcuda-is-device \
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// RUN: -o - %s | FileCheck %s
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// RUN: %clang_cc1 -triple spirv64-amd-amdhsa -x hip -emit-llvm -fcuda-is-device \
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// RUN: -o - %s | FileCheck %s
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#define __device__ __attribute__((device))
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#define __shared__ __attribute__((shared))
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#define __constant__ __attribute__((constant))
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// CHECK: %struct.foo_t = type { i32, ptr addrspace(4) }
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// CHECK: @d ={{.*}} addrspace(1) externally_initialized global
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__device__ int d;
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// CHECK: @c ={{.*}} addrspace(1) externally_initialized constant
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__constant__ int c;
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// CHECK: @s ={{.*}} addrspace(3) global
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__shared__ int s;
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// CHECK: @foo ={{.*}} addrspace(1) externally_initialized global %struct.foo_t
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__device__ struct foo_t {
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int i;
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int* pi;
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} foo;
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// Check literals are placed in address space 1 (CrossWorkGroup/__global).
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// CHECK: @.str ={{.*}} unnamed_addr addrspace(1) constant
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// CHECK: define{{.*}} spir_func noundef ptr addrspace(4) @_Z3barPi(ptr addrspace(4)
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__device__ int* bar(int *x) {
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return x;
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}
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// CHECK: define{{.*}} spir_func noundef ptr addrspace(4) @_Z5baz_dv()
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__device__ int* baz_d() {
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// CHECK: ret ptr addrspace(4) addrspacecast (ptr addrspace(1) @d to ptr addrspace(4)
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return &d;
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}
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// CHECK: define{{.*}} spir_func noundef ptr addrspace(4) @_Z5baz_cv()
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__device__ int* baz_c() {
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// CHECK: ret ptr addrspace(4) addrspacecast (ptr addrspace(1) @c to ptr addrspace(4)
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return &c;
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}
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// CHECK: define{{.*}} spir_func noundef ptr addrspace(4) @_Z5baz_sv()
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__device__ int* baz_s() {
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// CHECK: ret ptr addrspace(4) addrspacecast (ptr addrspace(3) @s to ptr addrspace(4)
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return &s;
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}
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// CHECK: define{{.*}} spir_func noundef ptr addrspace(4) @_Z3quzv()
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__device__ const char* quz() {
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return "abc";
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}
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