1 files changed, 25 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/transmute_float_to_int.rs b/src/tools/clippy/tests/ui/transmute_float_to_int.rs
new file mode 100644
index 000000000..806b2d77d
--- /dev/null
+++ b/src/tools/clippy/tests/ui/transmute_float_to_int.rs
@@ -0,0 +1,25 @@
+#![warn(clippy::transmute_float_to_int)]
+
+fn float_to_int() {
+    let _: u32 = unsafe { std::mem::transmute(1f32) };
+    let _: i32 = unsafe { std::mem::transmute(1f32) };
+    let _: u64 = unsafe { std::mem::transmute(1f64) };
+    let _: i64 = unsafe { std::mem::transmute(1f64) };
+    let _: u64 = unsafe { std::mem::transmute(1.0) };
+    let _: u64 = unsafe { std::mem::transmute(-1.0) };
+}
+
+mod issue_5747 {
+    const VALUE32: i32 = unsafe { std::mem::transmute(1f32) };
+    const VALUE64: u64 = unsafe { std::mem::transmute(1f64) };
+
+    const fn to_bits_32(v: f32) -> u32 {
+        unsafe { std::mem::transmute(v) }
+    }
+
+    const fn to_bits_64(v: f64) -> i64 {
+        unsafe { std::mem::transmute(v) }
+    }
+}
+
+fn main() {}