[PATCH] D86229: [X86] Enable constexpr on POPCNT intrinsics (PR31446)

[Simon Pilgrim via Phabricator via cfe-commits]

RKSimon added inline comments.


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Comment at: clang/lib/Headers/popcntintrin.h:16
 
+#ifdef __cplusplus
+#define __DEFAULT_FN_ATTRS_CONSTEXPR __DEFAULT_FN_ATTRS constexpr
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craig.topper wrote:
> Do we need to check for C++11?
I don't actually know - its trivial to add a __cplusplus >= 201103L check but I don't know what we are expected to support in compiler headers like these.


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  https://reviews.llvm.org/D86229/new/

https://reviews.llvm.org/D86229