[PATCH] D129735: [RISCV] Add new pass to transform undef to pseudo for vector values.

[Craig Topper via Phabricator via llvm-commits]

craig.topper added inline comments.


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Comment at: llvm/test/CodeGen/RISCV/O3-pipeline.ll:109
 ; CHECK-NEXT:       RISCV Insert VSETVLI pass
+; CHECK-NEXT:       RISCV init undef pass
 ; CHECK-NEXT:       Detect Dead Lanes
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craig.topper wrote:
> If I understand correctly, we're effectively running DetectDeadLanes inside of RISCV init undef pass and then running the real DetectDeadLanes pass which won't do anything because we already did it?
Can we run DetectDeadLanes, then run our pass and just use the portion of the DetectDeadLanes that computes the Lane Masks in our pass?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D129735/new/

https://reviews.llvm.org/D129735