memory_space¶
Which memory an array's storage lives in.
Declaration¶
Syntax¶
memory_space = Global | Shared | Constant | Thread
Values¶
Value |
Meaning |
|---|---|
|
device global memory, the buffers the host allocates. This is the default, and it is what every array in host code has. |
|
storage shared by the threads of one threadgroup. |
|
read only storage. |
|
storage private to one thread. |
Return values¶
None. An enumeration value is not evaluated.
Description¶
The memory space is a member of Array. It matters
only where the target distinguishes the spaces: Metal qualifies every pointer
as device, threadgroup, constant or thread, while CUDA does not
qualify pointers at all.
The gpu_memory_space pass assigns the spaces to the arrays of device code.
A procedure called with arrays from different spaces cannot be emitted once,
because the qualifiers are part of its signature, so the pass clones it per
distinct combination of spaces.
The per-thread value is called Thread rather than Private because the ASR
enumerations share one namespace, and Private is already a value of
access.