From a35b4234df9815e7741aff8fe7cc4dfde12dcc2c Mon Sep 17 00:00:00 2001
From: Oliver Middleton <olliemail27@gmail.com>
Date: Sat, 4 Jan 2020 23:44:19 +0000
Subject: [PATCH] Remove negative number check from float sqrt

It hasn't been UB to pass negative numbers to sqrt since https://reviews.llvm.org/D28797 which was included in LLVM 5.
---
 src/libstd/f32.rs | 2 +-
 src/libstd/f64.rs | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libstd/f32.rs b/src/libstd/f32.rs
index 54e0caeddaa0b..267d7013b1e42 100644
--- a/src/libstd/f32.rs
+++ b/src/libstd/f32.rs
@@ -376,7 +376,7 @@ impl f32 {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
     pub fn sqrt(self) -> f32 {
-        if self < 0.0 { NAN } else { unsafe { intrinsics::sqrtf32(self) } }
+        unsafe { intrinsics::sqrtf32(self) }
     }
 
     /// Returns `e^(self)`, (the exponential function).
diff --git a/src/libstd/f64.rs b/src/libstd/f64.rs
index aa32e5fb998bc..61ce7b29e26fc 100644
--- a/src/libstd/f64.rs
+++ b/src/libstd/f64.rs
@@ -342,7 +342,7 @@ impl f64 {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
     pub fn sqrt(self) -> f64 {
-        if self < 0.0 { NAN } else { unsafe { intrinsics::sqrtf64(self) } }
+        unsafe { intrinsics::sqrtf64(self) }
     }
 
     /// Returns `e^(self)`, (the exponential function).