[all-commits] [llvm/llvm-project] 9a6433: [flang] Inline hlfir.dot_product. (#123143)

[Slava Zakharin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9a6433f0ff1b8e294ac785ea3b992304574e0d8f
      https://github.com/llvm/llvm-project/commit/9a6433f0ff1b8e294ac785ea3b992304574e0d8f
  Author: Slava Zakharin <szakharin at nvidia.com>
  Date:   2025-01-16 (Thu, 16 Jan 2025)

  Changed paths:
    M flang/include/flang/Optimizer/Builder/HLFIRTools.h
    M flang/lib/Optimizer/Builder/HLFIRTools.cpp
    M flang/lib/Optimizer/HLFIR/Transforms/SimplifyHLFIRIntrinsics.cpp
    A flang/test/HLFIR/simplify-hlfir-intrinsics-dotproduct.fir

  Log Message:
  -----------
  [flang] Inline hlfir.dot_product. (#123143)

Some good results for induct2, where dot_product is applied
to a vector of unknow size and a known 3-element vector:
the inlining ends up generating a 3-iteration loop, which
is then fully unrolled. With late FIR simplification
it is not happening even when the simplified intrinsics
implementation is inlined by LLVM (because the loop bounds
are not known).

This change just follows the current approach to expose
the loops for later worksharing application.



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