| Issue |
137188
|
| Summary |
[DirectX] Legalize memcpy
|
| Labels |
backend:DirectX
|
| Assignees |
|
| Reporter |
farzonl
|
## Problem
Currently we are emitting memcpys both 64bit and 32bit versions
The DML shaders will have errors like so:
`error: Unsupported intrinsic llvm.memcpy.p3.p3.i32 for DXIL lowering`
We emit this error because the memcpy intrinsic is not valid DXIL.
These memcpys tend to be in the `hlsl_groupshared` ie `addressspace(3)`. This might make the memcpy more involved to serialize into a set of store calls.
## Example
```llvm
tail call void @llvm.memcpy.p3.p3.i32(ptr addrspace(3) align 4 %scevgep, ptr addrspace(3) align 4 %scevgep19, i32 %38, i1 false)
```
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