From cbabb1be329b80f012223b230384cba8134820f6 Mon Sep 17 00:00:00 2001 From: Nikita Popov Date: Sat, 14 Apr 2018 16:21:46 +0200 Subject: [PATCH] Remove warning about f64->f32 cast being potential UB As discussed in #15536, the LLVM documentation incorrect described overflowing f64->f32 casts as being undefined behavior. LLVM never treated them as such, and the documentation has been adjusted in https://reviews.llvm.org/rL329065. As such, this warning can now be removed. Closes #49622. --- src/librustc_typeck/check/demand.rs | 4 ---- 1 file changed, 4 deletions(-) diff --git a/src/librustc_typeck/check/demand.rs b/src/librustc_typeck/check/demand.rs index ecfe141605029..c0d6993c7d4dd 100644 --- a/src/librustc_typeck/check/demand.rs +++ b/src/librustc_typeck/check/demand.rs @@ -502,10 +502,6 @@ impl<'a, 'gcx, 'tcx> FnCtxt<'a, 'gcx, 'tcx> { &format!("{}, producing the closest possible value", msg), cast_suggestion); - err.warn("casting here will cause undefined behavior if the value is \ - finite but larger or smaller than the largest or smallest \ - finite value representable by `f32` (this is a bug and will be \ - fixed)"); } true }