[all-commits] [llvm/llvm-project] d1a6ea: [Attributor][NFC] Performance improvements (#122923)

[macurtis-amd via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d1a6eaa47884a44a122bdd1e8a22af1dff3dbcfe
      https://github.com/llvm/llvm-project/commit/d1a6eaa47884a44a122bdd1e8a22af1dff3dbcfe
  Author: macurtis-amd <macurtis at amd.com>
  Date:   2025-01-14 (Tue, 14 Jan 2025)

  Changed paths:
    M llvm/include/llvm/Transforms/IPO/Attributor.h
    M llvm/lib/Transforms/IPO/Attributor.cpp
    M llvm/lib/Transforms/IPO/AttributorAttributes.cpp

  Log Message:
  -----------
  [Attributor][NFC] Performance improvements (#122923)

` forallInterferingAccesses` is a hotspot and for large modules these
changes make a measurable improvement in compilation time.

For LTO kernel compilation of 519.clvleaf (SPEChpc 2021) I measured the
following:
```
                    |   Measured times (s)   | Average | speedup
--------------------+------------------------+---------+---------
Baseline            | 33.268  33.332  33.275 |  33.292 |      0%
Cache "kernel"      | 30.543  30.339  30.607 |  30.496 |    9.2%
templatize callback | 30.981  30.97   30.964 |  30.972 |    7.5%
Both changes        | 29.284  29.201  29.053 |  29.179 |   14.1%
```



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