llvm-project

1c85981e - [llvm][mustache] Avoid redundant saves in accessor splitting (#159197)

[llvm][mustache] Avoid redundant saves in accessor splitting (#159197) The splitMustacheString function was saving StringRefs that were already backed by an arena-allocated string. This was unnecessary work. This change removes the redundant Ctx.Saver.save() call. This optimization provides a small but measurable performance improvement on top of the single-pass tokenizer, most notably reducing branch misses. Metric | Baseline | Optimized | Change -------------- | -------- | --------- | ------- Time (ms) | 35.77 | 35.57 | -0.56% Cycles | 35.16M | 34.91M | -0.71% Instructions | 85.77M | 85.54M | -0.27% Branch Misses | 113.9K | 111.9K | -1.76% Cache Misses | 237.7K | 242.1K | +1.85%