nak: Fix a bunch of warnings

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24998>

src/nouveau/compiler/nak.rs

@@ -28,7 +28,6 @@ mod util;
 
 use crate::nak_ir::ShaderStageInfo;
 
-use bitview::*;
 use nak_bindings::*;
 use nak_from_nir::*;
 use nak_ir::ShaderIoInfo;
@@ -164,7 +163,7 @@ pub extern "C" fn nak_compiler_destroy(nak: *mut nak_compiler) {
 }
 
 #[no_mangle]
-pub extern "C" fn nak_debug_flags(nak: *const nak_compiler) -> u64 {
+pub extern "C" fn nak_debug_flags(_nak: *const nak_compiler) -> u64 {
     DEBUG.debug_flags().into()
 }
 

src/nouveau/compiler/nak_calc_instr_deps.rs

@@ -129,10 +129,6 @@ impl BarAlloc {
         self.wr_bars & (1 << bar) != 0
     }
 
-    pub fn is_rd_bar(&self, bar: u8) -> bool {
-        !self.is_wr_bar(bar)
-    }
-
     pub fn get_bar(&self, dep: usize) -> Option<u8> {
         let bar = self.dep_bar[dep];
         if bar == u8::MAX {

src/nouveau/compiler/nak_encode_sm75.rs

@@ -1708,12 +1708,12 @@ impl SM75Instr {
         self.set_reg_src(24..32, op.idx);
     }
 
-    fn encode_kill(&mut self, op: &OpKill) {
+    fn encode_kill(&mut self, _op: &OpKill) {
         self.set_opcode(0x95b);
         self.set_pred_src(87..90, 90, SrcRef::True.into());
     }
 
-    fn encode_nop(&mut self, op: &OpNop) {
+    fn encode_nop(&mut self, _op: &OpNop) {
         self.set_opcode(0x918);
     }
 

src/nouveau/compiler/nak_from_nir.rs

@@ -6,8 +6,6 @@
 #![allow(non_upper_case_globals)]
 #![allow(unstable_name_collisions)]
 
-use crate::bitset::BitSet;
-use crate::bitview::{BitMutView, BitView, SetField};
 use crate::nak_cfg::CFGBuilder;
 use crate::nak_ir::*;
 use crate::nak_sph::{OutputTopology, PixelImap};
@@ -1825,7 +1823,7 @@ impl<'a> ShaderFromNir<'a> {
                 });
             }
             nir_intrinsic_store_output => {
-                let ShaderIoInfo::Fragment(io) = &mut self.info.io else {
+                let ShaderIoInfo::Fragment(_) = &mut self.info.io else {
                     panic!("load_input is only used for fragment shaders");
                 };
                 let data = self.get_src(&srcs[0]);
@@ -2188,7 +2186,7 @@ impl<'a> ShaderFromNir<'a> {
 
         self.parse_cf_list(&mut ssa_alloc, &mut phi_map, nfi.iter_body());
 
-        let mut cfg = std::mem::take(&mut self.cfg).as_cfg();
+        let cfg = std::mem::take(&mut self.cfg).as_cfg();
         assert!(cfg.len() > 0);
         for i in 0..cfg.len() {
             if cfg[i].falls_through() {

src/nouveau/compiler/nak_ir.rs

@@ -5,7 +5,7 @@
 
 extern crate nak_ir_proc;
 
-use crate::bitview::{BitMutView, SetField};
+use crate::bitview::{BitMutView};
 pub use crate::nak_builder::{
     Builder, InstrBuilder, SSABuilder, SSAInstrBuilder,
 };