bcraig added a subscriber: bcraig. ================ Comment at: lib/Frontend/InitPreprocessor.cpp:305 @@ +304,3 @@ + if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 && + TypeWidth <= InlineWidth) + return Always; ---------------- On some targets (like Hexagon), 4-byte values are cheap to inline, but 1-byte values are not. Clang is spotty about checking this, but TargetInfo::hasBuiltinAtomic seems like the right function to ask, if you have access to it.
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