| Issue |
183605
|
| Summary |
sendmsg intrinsics should fold unused m0 inputs to poison
|
| Labels |
backend:AMDGPU,
missed-optimization
|
| Assignees |
|
| Reporter |
arsenm
|
AMDGPUInstCombineIntrinsic should fold the second argument of`llvm.amdgcn.s.sendmsg` to poison if the message kind does not make use of m0. This intrinsic takes an immediate value encoding the type of message, and a second operand for what to pass in m0. Typically we now get an unnecessary initialization of m0 to 0.
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