Fix latest clippy (#1676)

* Fix latest clippy

* wasm

Author: Nashtare

plonky2/src/gates/util.rs

@@ -41,7 +41,7 @@ impl<'a, P: PackedField> StridedConstraintConsumer<'a, P> {
 
     /// Emit one constraint.
     pub fn one(&mut self, constraint: P) {
-        if self.start != self.end {
+        if !core::ptr::eq(self.start, self.end) {
             // # Safety
             // The checks in `new` guarantee that this points to valid space.
             unsafe {

plonky2/src/hash/arch/aarch64/poseidon_goldilocks_neon.rs

@@ -54,23 +54,6 @@ const fn check_mds_matrix() -> bool {
 }
 const_assert!(check_mds_matrix());
 
-/// Ensure that the first WIDTH round constants are in canonical* form. This is required because
-/// the first constant layer does not handle double overflow.
-/// *: round_const == GoldilocksField::ORDER is safe.
-/*
-#[allow(dead_code)]
-const fn check_round_const_bounds_init() -> bool {
-    let mut i = 0;
-    while i < WIDTH {
-        if ALL_ROUND_CONSTANTS[i] > GoldilocksField::ORDER {
-            return false;
-        }
-        i += 1;
-    }
-    true
-}
-const_assert!(check_round_const_bounds_init());
-*/
 // ====================================== SCALAR ARITHMETIC =======================================
 
 /// Addition modulo ORDER accounting for wraparound. Correct only when a + b < 2**64 + ORDER.
@@ -149,26 +132,6 @@ unsafe fn multiply(x: u64, y: u64) -> u64 {
     add_with_wraparound(res0, xy_hi_lo_mul_epsilon)
 }
 
-// ==================================== STANDALONE CONST LAYER =====================================
-
-/// Standalone const layer. Run only once, at the start of round 1. Remaining const layers are fused
-/// with the preceding MDS matrix multiplication.
-/*
-#[inline(always)]
-#[unroll_for_loops]
-unsafe fn const_layer_full(
-    mut state: [u64; WIDTH],
-    round_constants: &[u64; WIDTH],
-) -> [u64; WIDTH] {
-    assert!(WIDTH == 12);
-    for i in 0..12 {
-        let rc = round_constants[i];
-        // add_with_wraparound is safe, because rc is in canonical form.
-        state[i] = add_with_wraparound(state[i], rc);
-    }
-    state
-}
-*/
 // ========================================== FULL ROUNDS ==========================================
 
 /// Full S-box.

plonky2/src/hash/arch/x86_64/poseidon_goldilocks_avx2_bmi2.rs

@@ -1,3 +1,5 @@
+#![allow(clippy::assertions_on_constants)]
+
 use core::arch::asm;
 use core::arch::x86_64::*;
 use core::mem::size_of;

plonky2/src/util/strided_view.rs

@@ -203,7 +203,7 @@ impl<'a, P: PackedField> Iterator for PackedStridedViewIter<'a, P> {
             "start and end pointers should be separated by a multiple of stride"
         );
 
-        if self.start != self.end {
+        if !core::ptr::eq(self.start, self.end) {
             let res = unsafe { &*self.start.cast() };
             // See comment in `PackedStridedView`. Below will point more than one byte past the end
             // of the buffer if the offset is not 0 and we've reached the end.
@@ -224,7 +224,7 @@ impl<P: PackedField> DoubleEndedIterator for PackedStridedViewIter<'_, P> {
             "start and end pointers should be separated by a multiple of stride"
         );
 
-        if self.start != self.end {
+        if !core::ptr::eq(self.start, self.end) {
             // See comment in `PackedStridedView`. `self.end` starts off pointing more than one byte
             // past the end of the buffer unless `offset` is 0.
             self.end = self.end.wrapping_sub(self.stride);