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Bitcode allows you to optimize between chip versions with different opcodes, but not different architectures, word sizes, or endianness. Source: the recent Acc
by syncsynchalt 10y ago
Bitcode allows you to optimize between chip versions with different opcodes, but not different architectures, word sizes, or endianness.
Source: the recent Accidental Tech Podcast that interviewed Chris Lattner.
- gpderetta 10y agoTrue, but AArch64 vs AMD64 are not so different (64 bits, little endian, probably quite similar ABIs), it is not unthinkable that the same bitcode could target both architectures.
- abalone 10y agoOk fine, but the broader App Thinning featureset of the App Store still means they wouldn't do a universal binary. They'd deliver just what the target device needs.