[all-commits] [llvm/llvm-project] 3c700d: [flang] Extract hlfir.assign inlining from opt-buf...

[Slava Zakharin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3c700d131a35ce4b0063a4688dce4a0cb739ca83
      https://github.com/llvm/llvm-project/commit/3c700d131a35ce4b0063a4688dce4a0cb739ca83
  Author: Slava Zakharin <szakharin at nvidia.com>
  Date:   2025-01-03 (Fri, 03 Jan 2025)

  Changed paths:
    M flang/include/flang/Optimizer/HLFIR/Passes.td
    M flang/lib/Optimizer/HLFIR/Transforms/CMakeLists.txt
    A flang/lib/Optimizer/HLFIR/Transforms/InlineHLFIRAssign.cpp
    M flang/lib/Optimizer/HLFIR/Transforms/OptimizedBufferization.cpp
    M flang/lib/Optimizer/Passes/Pipelines.cpp
    M flang/test/Driver/mlir-pass-pipeline.f90
    M flang/test/Fir/basic-program.fir
    A flang/test/HLFIR/inline-hlfir-assign.fir
    M flang/test/HLFIR/maxloc-elemental.fir
    M flang/test/HLFIR/minloc-elemental.fir
    M flang/test/HLFIR/opt-bufferization-eval_in_mem.fir
    M flang/test/HLFIR/opt-bufferization.fir
    R flang/test/HLFIR/opt-variable-assign.fir

  Log Message:
  -----------
  [flang] Extract hlfir.assign inlining from opt-bufferization. (#121544)

Optimized bufferization can transform hlfir.assign into a loop
nest doing element per element assignment, but it avoids
doing so for RHS that is hlfir.expr. This is done to let
ElementalAssignBufferization pattern to try to do a better job.

This patch moves the hlfir.assign inlining after opt-bufferization,
and enables it for hlfir.expr RHS.

The hlfir.expr RHS cases are present in tonto, and this patch
results in some nice improvements. Note that those cases
are handled by other compilers also using array temporaries,
so this patch seems to just get rid of the Assign runtime
overhead/inefficiency.



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