[WebAssembly] SIMD conversions
Summary:
Lowers (s|u)itofp and fpto(s|u)i instructions for vectors. The fp to
int conversions produce poison values if their arguments are out of
the convertible range, so a future CL will have to add an LLVM
intrinsic to make the saturating behavior of this conversion usable.
Reviewers: aheejin, dschuff
Subscribers: sbc100, jgravelle-google, sunfish, llvm-commits
Differential Revision: https://reviews.llvm.org/D52372
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@343052
91177308-0d34-0410-b5e6-
96231b3b80d8