[flang-commits] [PATCH] D144102: [flang][hlfir] Array constructor lowering [part 1/4]

[Jean Perier via Phabricator via flang-commits]

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This is the first and biggest chunk that introduces support for
array constructor to HLFIR.

This patch:

- adds a new ConvertArrayConstructor.cpp that centralizes the code dealing with array constructor lowering.
- introduces a framework to lower array constructor according to different strategies: A common analysis of the array constructor is done, and based on that, a lowering startegy is selected and driven through the ac-values of the array constructor. See ConvertArrayConstructor.cpp comments for more details.
- implements the first strategy that creates a temporary inlined and updates it with inlined code. This strategy can only be used if the temporary can be pre-allocated (i.e: the extents and length parameters can be pre-computed without evaluating any ac-values), and if all the ac-value expressions are scalars.

For the sake of simplicity, characters and derived type will be enabled
once all the strategies are added.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D144102

Files:
  flang/include/flang/Lower/ConvertArrayConstructor.h
  flang/lib/Lower/CMakeLists.txt
  flang/lib/Lower/ConvertArrayConstructor.cpp
  flang/lib/Lower/ConvertExprToHLFIR.cpp
  flang/test/Lower/HLFIR/array-ctor-as-inlined-temp.f90

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