[AssignmentTracking][NFC] Cache interesting debug records and instructions #149514
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OCHyams commented Jul 21, 2025
| // Process the instructions in "frames". A "frame" includes a single | ||
| // non-debug instruction followed any debug instructions before the | ||
| // next non-debug instruction. A pointer-int int value of 1 on an | ||
| // instruction means non-debug instructions follow (end of frame). |
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err, note to self, this comment has the bit value the wrong way around
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Rather than visit all instructions each iteration of the analysis, we can cache the interesting ones ahead of time while performing other setup related tasks.
Marginal performance improvement. Note in this compile-tim-tracker comparison I've enabled assignment tracking support with lto, which isn't the same as on main:
http://llvm-compile-time-tracker.com/compare.php?from=80d92fc648d0160e0bbd191ba67b0f05218d4b69&to=1a38acc6e758919bbce5a451b7fe39c89a134c01&stat=instructions%3Au