[PATCH] D117814: [AMDGPU] Do not ignore exec use where exec is read as data

[Jay Foad via Phabricator via llvm-commits]

foad reopened this revision.
foad added a comment.
This revision is now accepted and ready to land.

> Compares, v_cndmask_b32, and v_readfirstlane_b32 use EXEC in a way which modifies the result.

This doesn't make any sense to me for cndmask. It handles EXEC exactly the same as any other VALU instruction: it writes a result in any lane which is enabled by EXEC, and does nothing for any lane that is disabled.


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https://reviews.llvm.org/D117814