There have been significant improvements to LLVM's handling of debug info in optimized code over the past year. We will highlight recent improvements (many of which came from new contributors!) and outline some important challenges ahead.
To get the conversation going, we will present data showing improvements in source variable availability and identify passes that need more work. Potential topics for discussion include eliminating codegen differences in the presence of debug info, improving line table fidelity, features missing in LLVM's current debug info representation, and higher quality backtraces in the presence of tail calls and outlining.
