[all-commits] [llvm/llvm-project] 498424: [LV] Fix MinBWs in WidenIntrinsic case (#137005)

[Ramkumar Ramachandra via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 49842426f3fc70af756f9e6fe80ecf829178a1b2
      https://github.com/llvm/llvm-project/commit/49842426f3fc70af756f9e6fe80ecf829178a1b2
  Author: Ramkumar Ramachandra <ramkumar.ramachandra at codasip.com>
  Date:   2025-04-29 (Tue, 29 Apr 2025)

  Changed paths:
    M llvm/lib/Analysis/VectorUtils.cpp
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    A llvm/test/Transforms/LoopVectorize/pr87407-trunc-with-intrinsic.ll

  Log Message:
  -----------
  [LV] Fix MinBWs in WidenIntrinsic case (#137005)

There is a bug in the computation and handling of MinBWs in the case of
VPWidenIntrinsicRecipe: a crash is observed in
VPlanTransforms::truncateToMinimalBitwidths due to a mismatch between
the number of recipes processed and the number of entries in MinBWs. Fix
handling of calls in llvm::computeMinimumValueSizes, and handle
VPWidenIntrinsicRecipe in truncateToMinimalBitwidths, fixing the bug.

Fixes #87407.



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