[PATCH] D22105: [X86][SSE] Reimplement SSE fp2si conversion intrinsics instead of using generic IR

[Simon Pilgrim via cfe-commits]

RKSimon added a comment.

In https://reviews.llvm.org/D22105#488513, @eli.friedman wrote:

> I don't think we need to use x86-specific operations for sitofp-like conversions; the C cast is equivalent given that a 32 or 64-bit integer is always in within the range of a 32-bit float.


I think the only situation that lossless conversion occurs is i32->f64, every other sitofp conversion could be affected by the rounding control no?


Repository:
  rL LLVM

https://reviews.llvm.org/D22105