This revision introduces a generic implementation of Scalar Replacement
Of Aggregates. In contrast to the implementation in LLVM, this focuses
on the core of SROA: destructuring aggregates. By implementing
interfaces on allocators and accessors, memory allocators can be
destructured into smaller allocators, through the MemorySlot
abstraction.
This pass only works on aggregates that are accessed in a "type-safe"
way, that is within the bounds and respecting the type of a given memory
slot. The destructuring pattern and functions only peel off the first
layer of aggregates and can safely be applied repeatedly. For
convenience, the transformation is also available as a pass that will
apply the pattern repeatedly.
Depends on D149958
Reviewed By: gysit
Differential Revision: https://reviews.llvm.org/D150186
This patch refactors the Mem2Reg infrastructure. It decouples
analysis from promotion, allowing for more control over the execution of
the logic. It also adjusts the interfaces to be less coupled to mem2reg
and more general. This will be useful for an upcoming revision
introducing generic SROA.
This commit reverts f333977eb2 and relands 91cff8a718.
The original commit was reverted accidentally due to a misinterpretation
of a bazel build bot failure.
Reviewed By: gysit
Differential Revision: https://reviews.llvm.org/D149825
This patch refactors the Mem2Reg infrastructure. It decouples
analysis from promotion, allowing for more control over the execution of
the logic. It also adjusts the interfaces to be less coupled to mem2reg
and more general. This will be useful for an upcoming revision
introducing generic SROA.
Reviewed By: gysit
Differential Revision: https://reviews.llvm.org/D149825
