From d195f80639715d54918a7cff171113ed25474d27 Mon Sep 17 00:00:00 2001
From: Trevor Spiteri <tspiteri@ieee.org>
Date: Fri, 13 Sep 2024 13:28:22 +0200
Subject: [PATCH] Revert "stabilize const_float_bits_conv" for
 src/tools/clippy/clippy_lints

This reverts the part of commit 19908ff7a37a9a431399bb6f2868efc22820f2b6 in
subdirectory src/tools/clippy/clippy_lints.
---
 src/tools/clippy/clippy_lints/src/transmute/mod.rs          | 6 +++---
 .../clippy_lints/src/transmute/transmute_float_to_int.rs    | 3 ++-
 .../clippy_lints/src/transmute/transmute_int_to_float.rs    | 3 ++-
 .../clippy_lints/src/transmute/transmute_num_to_bytes.rs    | 6 ++++++
 4 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/src/tools/clippy/clippy_lints/src/transmute/mod.rs b/src/tools/clippy/clippy_lints/src/transmute/mod.rs
index a2ae36cc484ad..373bf61d8ff94 100644
--- a/src/tools/clippy/clippy_lints/src/transmute/mod.rs
+++ b/src/tools/clippy/clippy_lints/src/transmute/mod.rs
@@ -619,10 +619,10 @@ impl<'tcx> LateLintPass<'tcx> for Transmute {
                 | transmute_ref_to_ref::check(cx, e, from_ty, to_ty, arg, const_context)
                 | transmute_ptr_to_ptr::check(cx, e, from_ty, to_ty, arg, &self.msrv)
                 | transmute_int_to_bool::check(cx, e, from_ty, to_ty, arg)
-                | transmute_int_to_float::check(cx, e, from_ty, to_ty, arg)
+                | transmute_int_to_float::check(cx, e, from_ty, to_ty, arg, const_context)
                 | transmute_int_to_non_zero::check(cx, e, from_ty, to_ty, arg)
-                | transmute_float_to_int::check(cx, e, from_ty, to_ty, arg)
-                | transmute_num_to_bytes::check(cx, e, from_ty, to_ty, arg)
+                | transmute_float_to_int::check(cx, e, from_ty, to_ty, arg, const_context)
+                | transmute_num_to_bytes::check(cx, e, from_ty, to_ty, arg, const_context)
                 | (unsound_collection_transmute::check(cx, e, from_ty, to_ty)
                     || transmute_undefined_repr::check(cx, e, from_ty, to_ty))
                 | (eager_transmute::check(cx, e, arg, from_ty, to_ty));
diff --git a/src/tools/clippy/clippy_lints/src/transmute/transmute_float_to_int.rs b/src/tools/clippy/clippy_lints/src/transmute/transmute_float_to_int.rs
index cb46109c27e2f..ab3bb5e1062d3 100644
--- a/src/tools/clippy/clippy_lints/src/transmute/transmute_float_to_int.rs
+++ b/src/tools/clippy/clippy_lints/src/transmute/transmute_float_to_int.rs
@@ -15,9 +15,10 @@ pub(super) fn check<'tcx>(
     from_ty: Ty<'tcx>,
     to_ty: Ty<'tcx>,
     mut arg: &'tcx Expr<'_>,
+    const_context: bool,
 ) -> bool {
     match (&from_ty.kind(), &to_ty.kind()) {
-        (ty::Float(float_ty), ty::Int(_) | ty::Uint(_)) => {
+        (ty::Float(float_ty), ty::Int(_) | ty::Uint(_)) if !const_context => {
             span_lint_and_then(
                 cx,
                 TRANSMUTE_FLOAT_TO_INT,
diff --git a/src/tools/clippy/clippy_lints/src/transmute/transmute_int_to_float.rs b/src/tools/clippy/clippy_lints/src/transmute/transmute_int_to_float.rs
index e00fb90c3074e..d51888e30971b 100644
--- a/src/tools/clippy/clippy_lints/src/transmute/transmute_int_to_float.rs
+++ b/src/tools/clippy/clippy_lints/src/transmute/transmute_int_to_float.rs
@@ -14,9 +14,10 @@ pub(super) fn check<'tcx>(
     from_ty: Ty<'tcx>,
     to_ty: Ty<'tcx>,
     arg: &'tcx Expr<'_>,
+    const_context: bool,
 ) -> bool {
     match (&from_ty.kind(), &to_ty.kind()) {
-        (ty::Int(_) | ty::Uint(_), ty::Float(_)) => {
+        (ty::Int(_) | ty::Uint(_), ty::Float(_)) if !const_context => {
             span_lint_and_then(
                 cx,
                 TRANSMUTE_INT_TO_FLOAT,
diff --git a/src/tools/clippy/clippy_lints/src/transmute/transmute_num_to_bytes.rs b/src/tools/clippy/clippy_lints/src/transmute/transmute_num_to_bytes.rs
index 362f2bb6960a2..88b0ac5a36887 100644
--- a/src/tools/clippy/clippy_lints/src/transmute/transmute_num_to_bytes.rs
+++ b/src/tools/clippy/clippy_lints/src/transmute/transmute_num_to_bytes.rs
@@ -14,12 +14,18 @@ pub(super) fn check<'tcx>(
     from_ty: Ty<'tcx>,
     to_ty: Ty<'tcx>,
     arg: &'tcx Expr<'_>,
+    const_context: bool,
 ) -> bool {
     match (&from_ty.kind(), &to_ty.kind()) {
         (ty::Int(_) | ty::Uint(_) | ty::Float(_), ty::Array(arr_ty, _)) => {
             if !matches!(arr_ty.kind(), ty::Uint(UintTy::U8)) {
                 return false;
             }
+            if matches!(from_ty.kind(), ty::Float(_)) && const_context {
+                // TODO: Remove when const_float_bits_conv is stabilized
+                // rust#72447
+                return false;
+            }
 
             span_lint_and_then(
                 cx,