1 files changed, 63 insertions, 0 deletions
diff --git a/src/test/ui/consts/const-float-bits-conv.rs b/src/test/ui/consts/const-float-bits-conv.rs
new file mode 100644
index 000000000..fd5e42ef1
--- /dev/null
+++ b/src/test/ui/consts/const-float-bits-conv.rs
@@ -0,0 +1,63 @@
+// compile-flags: -Zmir-opt-level=0
+// run-pass
+
+#![feature(const_float_bits_conv)]
+#![feature(const_float_classify)]
+#![allow(unused_macro_rules)]
+
+// Don't promote
+const fn nop<T>(x: T) -> T { x }
+
+macro_rules! const_assert {
+    ($a:expr) => {
+        {
+            const _: () = assert!($a);
+            assert!(nop($a));
+        }
+    };
+    ($a:expr, $b:expr) => {
+        {
+            const _: () = assert!($a == $b);
+            assert_eq!(nop($a), nop($b));
+        }
+    };
+}
+
+fn f32() {
+    const_assert!((1f32).to_bits(), 0x3f800000);
+    const_assert!(u32::from_be_bytes(1f32.to_be_bytes()), 0x3f800000);
+    const_assert!((12.5f32).to_bits(), 0x41480000);
+    const_assert!(u32::from_le_bytes(12.5f32.to_le_bytes()), 0x41480000);
+    const_assert!((1337f32).to_bits(), 0x44a72000);
+    const_assert!(u32::from_ne_bytes(1337f32.to_ne_bytes()), 0x44a72000);
+    const_assert!((-14.25f32).to_bits(), 0xc1640000);
+    const_assert!(f32::from_bits(0x3f800000), 1.0);
+    const_assert!(f32::from_be_bytes(0x3f800000u32.to_be_bytes()), 1.0);
+    const_assert!(f32::from_bits(0x41480000), 12.5);
+    const_assert!(f32::from_le_bytes(0x41480000u32.to_le_bytes()), 12.5);
+    const_assert!(f32::from_bits(0x44a72000), 1337.0);
+    const_assert!(f32::from_ne_bytes(0x44a72000u32.to_ne_bytes()), 1337.0);
+    const_assert!(f32::from_bits(0xc1640000), -14.25);
+}
+
+fn f64() {
+    const_assert!((1f64).to_bits(), 0x3ff0000000000000);
+    const_assert!(u64::from_be_bytes(1f64.to_be_bytes()), 0x3ff0000000000000);
+    const_assert!((12.5f64).to_bits(), 0x4029000000000000);
+    const_assert!(u64::from_le_bytes(12.5f64.to_le_bytes()), 0x4029000000000000);
+    const_assert!((1337f64).to_bits(), 0x4094e40000000000);
+    const_assert!(u64::from_ne_bytes(1337f64.to_ne_bytes()), 0x4094e40000000000);
+    const_assert!((-14.25f64).to_bits(), 0xc02c800000000000);
+    const_assert!(f64::from_bits(0x3ff0000000000000), 1.0);
+    const_assert!(f64::from_be_bytes(0x3ff0000000000000u64.to_be_bytes()), 1.0);
+    const_assert!(f64::from_bits(0x4029000000000000), 12.5);
+    const_assert!(f64::from_le_bytes(0x4029000000000000u64.to_le_bytes()), 12.5);
+    const_assert!(f64::from_bits(0x4094e40000000000), 1337.0);
+    const_assert!(f64::from_ne_bytes(0x4094e40000000000u64.to_ne_bytes()), 1337.0);
+    const_assert!(f64::from_bits(0xc02c800000000000), -14.25);
+}
+
+fn main() {
+    f32();
+    f64();
+}