Use std::optional for ArmSpeDecoder::Record::source. #181
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A zero value is perfectly valid, e.g. on Neoverse N1 it means "L1 data cache" (https://developer.arm.com/documentation/100616/0400/debug-descriptions/statistical-profiling-extension/implementation-defined-features-of-spe). Conflating "L1 data cache" and "¯\_(ツ)_/¯" is a bit suboptimal... PiperOrigin-RevId: 735763823
shantuo
approved these changes
Apr 17, 2025
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A zero value is perfectly valid, e.g. on Neoverse N1 it means "L1 data cache" (https://developer.arm.com/documentation/100616/0400/debug-descriptions/statistical-profiling-extension/implementation-defined-features-of-spe). Conflating "L1 data cache" and "¯_(ツ)_/¯" is a bit suboptimal...
PiperOrigin-RevId: 735763823