diff --git a/src/nouveau/compiler/nak/legalize.rs b/src/nouveau/compiler/nak/legalize.rs
index fe995e7c27a..8e145d09649 100644
--- a/src/nouveau/compiler/nak/legalize.rs
+++ b/src/nouveau/compiler/nak/legalize.rs
@@ -970,6 +970,7 @@ fn legalize_instr(
     b: &mut impl SSABuilder,
     bl: &impl BlockLiveness,
     block_uniform: bool,
+    pinned: &HashSet<SSARef>,
     ip: usize,
     instr: &mut Instr,
 ) {
@@ -989,7 +990,10 @@ fn legalize_instr(
             // we need to insert copies to warp regs which we can collect.
             match &mut src.src_ref {
                 SrcRef::SSA(vec) => {
-                    if vec.is_uniform() && vec.comps() > 1 {
+                    if vec.is_uniform()
+                        && vec.comps() > 1
+                        && !pinned.contains(vec)
+                    {
                         copy_ssa_ref(b, vec, vec.file().unwrap().to_warp());
                     }
                 }
@@ -1049,6 +1053,7 @@ impl Shader {
         let sm = self.info.sm;
         for f in &mut self.functions {
             let live = SimpleLiveness::for_function(f);
+            let mut pinned = HashSet::new();
 
             for (bi, b) in f.blocks.iter_mut().enumerate() {
                 let bl = live.block_live(bi);
@@ -1056,8 +1061,14 @@ impl Shader {
 
                 let mut instrs = Vec::new();
                 for (ip, mut instr) in b.instrs.drain(..).enumerate() {
+                    if let Op::Pin(pin) = &instr.op {
+                        if let Dst::SSA(ssa) = &pin.dst {
+                            pinned.insert(*ssa);
+                        }
+                    }
+
                     let mut b = SSAInstrBuilder::new(sm, &mut f.ssa_alloc);
-                    legalize_instr(&mut b, bl, bu, ip, &mut instr);
+                    legalize_instr(&mut b, bl, bu, &pinned, ip, &mut instr);
                     b.push_instr(instr);
                     instrs.append(&mut b.as_vec());
                 }