[PATCH] D47851: [LangRef] fptosi and fptoui return poison on overflow.

[Nuno Lopes via Phabricator via llvm-commits]

nlopes accepted this revision.
nlopes added a comment.
This revision is now accepted and ready to land.

LGTM.

The C++ standard defines this as UB: http://eel.is/c++draft/conv.fpint#1
"A prvalue of a floating-point type can be converted to a prvalue of an integer type. The conversion truncates; that is, the fractional part is discarded. 
The behavior is undefined if the truncated value cannot be represented in the destination type."


Repository:
  rL LLVM

https://reviews.llvm.org/D47851