a2ddb020d7
Do not consider loops with a zero backedge taken count as candidates for interchange. This seems like a sensible thing because it suggests the loop doesn't execute and there is no point in interchanging. As a bonus, this seems to avoid triggering an assert about phis and their uses from source code, so this is a partial fix for #163954 but it needs more work to properly fix that.
The LLVM Compiler Infrastructure
Welcome to the LLVM project!
This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.
The LLVM project has multiple components. The core of the project is itself called "LLVM". This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.
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