[all-commits] [llvm/llvm-project] f0e34f: [VPlan] Don't skip optimizable truncs in planConta...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f0e34f381866b82a26241f7e9aa5964f0dd11ebd
      https://github.com/llvm/llvm-project/commit/f0e34f381866b82a26241f7e9aa5964f0dd11ebd
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-08-30 (Fri, 30 Aug 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/test/Transforms/LoopVectorize/RISCV/truncate-to-minimal-bitwidth-cost.ll

  Log Message:
  -----------
  [VPlan] Don't skip optimizable truncs in planContainsAdditionalSimps.

A optimizable cast can also be removed by VPlan simplifications. Remove
the restriction from planContainsAdditionalSimplifications, as this
causes it to miss relevant simplifications, triggering false positives
for the cost decision verification.

Also adds debug output for printing additional cost-precomputations.

Fixes https://github.com/llvm/llvm-project/issues/106641.



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