bb2e85f12f
Previously, the TermDL (BB terminator → DebugLoc) map was initialized at the start of processing each function's region, creating entries for the entire function. This could be inefficient for large functions. This patch improves performance by creating map entries only when needed—when a terminator is being killed or when a flow block is created. Additionally, entries are removed immediately after use, preventing unnecessary map growth and ensuring DebugLocs are not "retracked." A mapless variant was also explored, but due to limited familiarity with the structurizer, it was not pursued further. In my cases, this change improves performance by 2-3×.
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