builder: allow unsigned integers in neg and exactsdiv.

Author: eddyb

crates/rustc_codegen_spirv/src/builder/builder_methods.rs

@@ -1600,9 +1600,9 @@ impl<'a, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'tcx> {
     // Same note and TODO as exactudiv
     simple_op! {
         exactsdiv,
-        sint: s_div,
+        int: s_div,
         fold_const {
-            sint(a, b) => a.checked_div(b)?;
+            int(a, b) => a.checked_div(b)?;
         }
     }
     simple_op! {fdiv, float: f_div}
@@ -1648,9 +1648,9 @@ impl<'a, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'tcx> {
     }
     simple_uni_op! {
         neg,
-        sint: s_negate,
+        int: s_negate,
         fold_const {
-            sint(a) => a.checked_neg()?;
+            int(a) => a.checked_neg()?;
         }
     }
     simple_uni_op! {fneg, float: f_negate}

examples/shaders/compute-shader/src/lib.rs

@@ -46,6 +46,12 @@ pub fn main_cs(
     #[spirv(global_invocation_id)] id: UVec3,
     #[spirv(storage_buffer, descriptor_set = 0, binding = 0)] prime_indices: &mut [u32],
 ) {
-    let index = id.x as usize;
+    let index = id.x as usize
+        + core::mem::size_of_val(
+            const {
+                struct S<T: ?Sized>(T);
+                &S([]) as &S<[()]>
+            },
+        );
     prime_indices[index] = collatz(prime_indices[index]).unwrap_or(u32::MAX);
 }