On 2/17/2019 11:40 PM, Henri Sivonen wrote:
Out of curiosity: Do we know if WebKit and Chromium compile with or
without strict-aliasing?
Chromium disabled strict aliasing in 2010 [1] and then in 2013 WONTFIX'd
the bug that would re-enable strict aliasing[2]. The WONTFIX discussion
[3] reported no big performance improvements (on Dromaeo or Octane) and
cited Firefox bug comments with similar results (for SunSpider and V8
benchmarks).
The Firefox test used gcc 4.3 in 2011. Maybe strict aliasing
optimizations are better with clang in 2019?
[1]
https://chromium.googlesource.com/chromium/src/+/ecf52cb820c80a600436aca1a5a72533db32b48d
[2] https://bugs.chromium.org/p/chromium/issues/detail?id=32204
[3]
https://groups.google.com/a/chromium.org/forum/#!msg/chromium-dev/dUebWSEpAR8/xhsispuiNu4J
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