pvanhout 026fc9e9c4 [AMDGPU] Handle Additional Cases in tryFoldPhiAGPR ...

Sometimes PHI have different incoming values, such as:
 ```
%1:vgpr_256 = COPY %0:agpr_256
%2:vgpr_32 = COPY %1:vgpr_256.sub0
```

Those weren't handled, which could lead to massive performance issues if break-large-PHIs kicked in + AGPRs were used (MFMA)

Fixes SWDEV-407986

Reviewed By: #amdgpu, arsenm

Differential Revision: https://reviews.llvm.org/D153879

2023-06-29 14:49:18 +02:00

68 KiB

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