[PATCH] D75723: [X86] Enable intrinsics _BitScan*

[Craig Topper via Phabricator via cfe-commits]

craig.topper added inline comments.


================
Comment at: clang/lib/Headers/ia32intrin.h:418
+  __extension__({                                                              \
+    *(a) = (unsigned)__bsfd((int)(b));                                         \
+    (unsigned char)((b) != 0);                                                 \
----------------
This store also needs to be conditional on b being non-zero


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D75723/new/

https://reviews.llvm.org/D75723