Merge ref 'f6092f224d2b' from rust-lang/rust

Pull recent changes from https://github.com/rust-lang/rust via Josh.

Upstream ref: f6092f224d2b1774b31033f12d0bee626943b02f
Filtered ref: f843cd4

This merge was created using https://github.com/rust-lang/josh-sync.

Author: RalfJung

tests/pass/float.rs

@@ -1419,12 +1419,12 @@ fn test_fmuladd() {
 
     #[inline(never)]
     pub fn test_operations_f32(a: f32, b: f32, c: f32) {
-        assert_approx_eq!(unsafe { fmuladdf32(a, b, c) }, a * b + c);
+        assert_approx_eq!(fmuladdf32(a, b, c), a * b + c);
     }
 
     #[inline(never)]
     pub fn test_operations_f64(a: f64, b: f64, c: f64) {
-        assert_approx_eq!(unsafe { fmuladdf64(a, b, c) }, a * b + c);
+        assert_approx_eq!(fmuladdf64(a, b, c), a * b + c);
     }
 
     test_operations_f32(0.1, 0.2, 0.3);

tests/pass/intrinsics/fmuladd_nondeterministic.rs

@@ -14,7 +14,7 @@ fn main() {
         let c = std::hint::black_box(-a * b);
         // It is unspecified whether the following operation is fused or not. The
         // following evaluates to 0.0 if unfused, and nonzero (-1.66e-18) if fused.
-        let x = unsafe { fmuladdf64(a, b, c) };
+        let x = fmuladdf64(a, b, c);
         x == 0.0
     });
 
@@ -24,7 +24,7 @@ fn main() {
         let c = std::hint::black_box(-a * b);
         // It is unspecified whether the following operation is fused or not. The
         // following evaluates to 0.0 if unfused, and nonzero (-8.1956386e-10) if fused.
-        let x = unsafe { fmuladdf32(a, b, c) };
+        let x = fmuladdf32(a, b, c);
         x == 0.0
     });