Dan Gohman cdd48b8a6b [WebAssembly] Fix trapping behavior in fptosi/fptoui. ...

This adds code to protect WebAssembly's `trunc_s` family of opcodes
from values outside their domain. Even though such conversions have
full undefined behavior in C/C++, LLVM IR's `fptosi` and `fptoui` do
not, and only return undef.

This also implements the proposed non-trapping float-to-int conversion
feature and uses that instead when available.

llvm-svn: 319128

2017-11-28 01:13:40 +00:00

6.0 KiB

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