Fold loadInst for constant aggregate types, those load results are equivalent for the given alignments. alive proofs: https://alive2.llvm.org/ce/z/qBGl72 - fold uniquely initialized global variable - add `ConstantFoldLoadFromPatternedAggregate` method to `AggressiveInstCombine` Depends on: https://reviews.llvm.org/D145355 Fixes: https://github.com/rust-lang/rust/issues/107208.

Fold loadInst for constant aggregate types, those load results are equivalent for the given alignments. This revision will be part 1 of the following stages. 1. alignment-based (This revision will be) 2. (all) inbounds GEP index-based 3. non-inbounds included GEP index-based - add `ConstantFoldLoadFromPatternedAggregate` method to `AggressiveInstCombine` alive proofs: https://alive2.llvm.org/ce/z/qBGl72 Depends on: https://reviews.llvm.org/D145355 Fixes: https://github.com/rust-lang/rust/issues/107208.

Fold loadInst for constant aggregate types, those load results are equivalent for the given alignments. alive proofs: https://alive2.llvm.org/ce/z/qBGl72This revision will be part 1 of the following stages. - fold uniquely initialized global variable1. alignment-based (This revision will be) 2. (all) inbounds GEP index-based 3. non-inbounds included GEP index-based - add `ConstantFoldLoadFromPatternedAggregate` method to `AggressiveInstCombine` alive proofs: https://alive2.llvm.org/ce/z/qBGl72 Depends on: https://reviews.llvm.org/D145355 Fixes: https://github.com/rust-lang/rust/issues/107208.