Hi Phoebe,
+ // Cortex M does not support 8 byte atomics, while general Thumb2 does.
+ StringRef Profile = getCPUProfile(Name);
+ if (Profile == "M" && MaxAtomicInlineWidth) {
+ MaxAtomicPromoteWidth = 32;
+ MaxAtomicInlineWidth = 32;
+ }
This seems like a fairly key point of the patch (it's what inspired
you to start working on this area isn't it?), but it's not tested; it
would be good to see some checks that the 64-bit case is handled as
expected.
Cheers.
Tim.
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