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[libc] Use the NVIDIA device allocator for GPU malloc #124277

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Merged
merged 1 commit into from
Jan 24, 2025
Merged

[libc] Use the NVIDIA device allocator for GPU malloc #124277

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4 changes: 4 additions & 0 deletions libc/src/stdlib/gpu/free.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,10 @@

namespace LIBC_NAMESPACE_DECL {

// FIXME: For now we just default to the NVIDIA device allocator which is
// always available on NVPTX targets. This will be implemented fully later.
#ifndef LIBC_TARGET_ARCH_IS_NVPTX
LLVM_LIBC_FUNCTION(void, free, (void *ptr)) { gpu::deallocate(ptr); }
#endif

} // namespace LIBC_NAMESPACE_DECL
4 changes: 4 additions & 0 deletions libc/src/stdlib/gpu/malloc.cpp
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Expand Up @@ -14,8 +14,12 @@

namespace LIBC_NAMESPACE_DECL {

// FIXME: For now we just default to the NVIDIA device allocator which is
// always available on NVPTX targets. This will be implemented fully later.
#ifndef LIBC_TARGET_ARCH_IS_NVPTX
LLVM_LIBC_FUNCTION(void *, malloc, (size_t size)) {
return gpu::allocate(size);
}
#endif

} // namespace LIBC_NAMESPACE_DECL
3 changes: 2 additions & 1 deletion libc/test/src/stdlib/CMakeLists.txt
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Expand Up @@ -420,7 +420,8 @@ if(LLVM_LIBC_FULL_BUILD)
)

# Only baremetal and GPU has an in-tree 'malloc' implementation.
if(LIBC_TARGET_OS_IS_BAREMETAL OR LIBC_TARGET_OS_IS_GPU)
if((LIBC_TARGET_OS_IS_BAREMETAL OR LIBC_TARGET_OS_IS_GPU) AND
NOT LIBC_TARGET_ARCHITECTURE_IS_NVPTX)
add_libc_test(
malloc_test
HERMETIC_TEST_ONLY
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