[llvm-dev] Interval analysis in LLVM

[Milind Chabbi via llvm-dev]

Is there any interval-based analysis framework in LLVM?
I am looking for iteratively collapsing sub-regions of a control-flow graph
and use the summary of the collapsed region in its enclosing region;
something akin to Allen and Cocke's, "A program data flow analysis
procedure," (https://amturing.acm.org/p137-allen.pdf).

This is not same as the region pass since a region is defined only over a
single entry single exit in LLVM.

-Milind
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