vsk added inline comments.
================
Comment at: lib/CodeGen/CGBuiltin.cpp:2263
+ }
+ }
+
----------------
rjmccall wrote:
> Is there a reason this only fails on x86? If LLVM doesn't have generic
> wide-operation lowering, this probably needs to be a target whitelist rather
> than a blacklist.
That makes sense. For the 128-bit operation, the whitelist is {x86-64, wasm64,
mips64}. We don't support this operation for bit widths larger than 128 bits on
any target. I'll update the patch accordingly.
https://reviews.llvm.org/D38861
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