RKSimon added a comment.
Definitely like this idea - hopefully it'll make it safer to remove unnecessary
builtins.
================
Comment at: avx2-builtins-codegen.c:182
@@ -151,1 +181,3 @@
+ // FIXME-CHECK-ASM: vpxor %ymm{{.*}}
+ // FIXME-CHECK-ASM: vandps {{.*}}, %ymm{{.*}}
return _mm256_andnot_si256(a, b);
----------------
Please can you add a comment explaining the FIXME?
http://reviews.llvm.org/D12212
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