nak: Rip out a few dead_code statements

This is a far less radical solution (but I still removed a decent
amount of them)

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27991>

src/nouveau/compiler/bitview/lib.rs

@@ -134,7 +134,6 @@ pub struct BitView<'a, BS: BitViewable + ?Sized> {
     range: Range<usize>,
 }
 
-#[allow(dead_code)]
 impl<'a, BS: BitViewable + ?Sized> BitView<'a, BS> {
     pub fn new(parent: &'a BS) -> Self {
         let len = parent.bits();
@@ -186,7 +185,6 @@ pub struct BitMutView<'a, BS: BitMutViewable + ?Sized> {
     range: Range<usize>,
 }
 
-#[allow(dead_code)]
 impl<'a, BS: BitMutViewable + ?Sized> BitMutView<'a, BS> {
     pub fn new(parent: &'a mut BS) -> Self {
         let len = parent.bits();
@@ -218,7 +216,6 @@ impl<'a, BS: BitMutViewable + ?Sized> BitMutView<'a, BS> {
         new_start..new_end
     }
 
-    #[allow(dead_code)]
     pub fn get_bit(&self, bit: usize) -> bool {
         self.get_bit_range_u64(bit..(bit + 1)) != 0
     }

src/nouveau/compiler/nak/bitset.rs

@@ -21,7 +21,6 @@ impl BitSet {
         }
     }
 
-    #[allow(dead_code)]
     pub fn reserve(&mut self, bits: usize) {
         self.reserve_words(bits.div_ceil(32));
     }
@@ -42,7 +41,6 @@ impl BitSet {
         }
     }
 
-    #[allow(dead_code)]
     pub fn is_empty(&self) -> bool {
         for w in self.words.iter() {
             if *w != 0 {
@@ -56,7 +54,6 @@ impl BitSet {
         self.words.get(word).cloned().unwrap_or(0)
     }
 
-    #[allow(dead_code)]
     pub fn next_set(&self, start: usize) -> Option<usize> {
         if start >= self.words.len() * 32 {
             return None;
@@ -75,7 +72,6 @@ impl BitSet {
         None
     }
 
-    #[allow(dead_code)]
     pub fn next_unset(&self, start: usize) -> usize {
         if start >= self.words.len() * 32 {
             return start;

src/nouveau/compiler/nak/ir.rs

@@ -350,12 +350,10 @@ impl<T> PerRegFile<T> {
         }
     }
 
-    #[allow(dead_code)]
     pub fn values(&self) -> slice::Iter<T> {
         self.per_file.iter()
     }
 
-    #[allow(dead_code)]
     pub fn values_mut(&mut self) -> slice::IterMut<T> {
         self.per_file.iter_mut()
     }
@@ -420,7 +418,6 @@ impl SSAValue {
     }
 
     /// Returns true if this SSA value is equal to SSAValue::NONE
-    #[allow(dead_code)]
     pub fn is_none(&self) -> bool {
         self.packed == 0
     }
@@ -791,6 +788,7 @@ pub enum SrcRef {
 }
 
 impl SrcRef {
+    #[allow(dead_code)]
     pub fn is_alu(&self) -> bool {
         match self {
             SrcRef::Zero | SrcRef::Imm32(_) | SrcRef::CBuf(_) => true,
@@ -809,6 +807,7 @@ impl SrcRef {
         }
     }
 
+    #[allow(dead_code)]
     pub fn is_barrier(&self) -> bool {
         match self {
             SrcRef::SSA(ssa) => ssa.file() == RegFile::Bar,
@@ -1382,7 +1381,6 @@ macro_rules! impl_display_for_op {
     };
 }
 
-#[allow(dead_code)]
 #[derive(Clone, Copy, Eq, Hash, PartialEq)]
 pub enum PredSetOp {
     And,
@@ -1681,7 +1679,6 @@ impl fmt::Display for FloatType {
     }
 }
 
-#[allow(dead_code)]
 #[derive(Clone, Copy, Eq, Hash, PartialEq)]
 pub enum FRndMode {
     NearestEven,
@@ -1982,7 +1979,6 @@ impl fmt::Display for MemOrder {
     }
 }
 
-#[allow(dead_code)]
 #[derive(Clone, Copy, Eq, Hash, PartialEq)]
 pub enum MemScope {
     CTA,
@@ -2150,7 +2146,6 @@ impl fmt::Display for AtomOp {
     }
 }
 
-#[allow(dead_code)]
 #[derive(Clone, Copy, Eq, PartialEq)]
 pub enum InterpFreq {
     Pass,
@@ -2159,7 +2154,6 @@ pub enum InterpFreq {
     State,
 }
 
-#[allow(dead_code)]
 #[derive(Clone, Copy, Eq, PartialEq)]
 pub enum InterpLoc {
     Default,
@@ -3011,7 +3005,6 @@ impl DisplayOp for OpLop3 {
 }
 impl_display_for_op!(OpLop3);
 
-#[allow(dead_code)]
 #[derive(Clone, Copy, Eq, PartialEq)]
 pub enum ShflOp {
     Idx,

src/nouveau/compiler/nak/sph.rs

@@ -455,6 +455,7 @@ impl ShaderProgramHeader {
 
     // TODO: This seems always set on fragment shaders, figure out what this is for.
     #[inline]
+    #[allow(dead_code)]
     pub fn set_unknown_bit611(&mut self, value: bool) {
         assert!(self.shader_type == ShaderType::Fragment);
         self.set_bit(611, value);