[eddyb's version/leftovers] add #[spirv(typed_buffer)] for explicit SpirvType::InterfaceBlocks.

Author: eddyb

crates/rustc_codegen_spirv/src/abi.rs

@@ -500,8 +500,8 @@ impl<'tcx> ConvSpirvType<'tcx> for TyAndLayout<'tcx> {
                     // perfectly, in every way that could potentially affect ABI.
                     if self.fields.offset(i) == Size::ZERO
                         && field.size == self.size
-                        && field.align == self.align
-                        && field.backend_repr == self.backend_repr
+                        && field.align.abi == self.align.abi
+                        && field.backend_repr.eq_up_to_validity(&self.backend_repr)
                     {
                         return field.spirv_type(span, cx);
                     }

crates/spirv-std/src/typed_buffer.rs

@@ -74,7 +74,7 @@ impl<T> Deref for TypedBuffer<[T]> {
                 "%result = OpCompositeConstruct typeof*{result_slot} %inner_ptr %inner_len",
                 "OpStore {result_slot} %result",
                 buffer = in(reg) self,
-                result_slot = in(reg) &mut result_slot,
+                result_slot = in(reg) result_slot.as_mut_ptr(),
             }
             result_slot.assume_init()
         }
@@ -94,7 +94,7 @@ impl<T> DerefMut for TypedBuffer<[T]> {
                 "%result = OpCompositeConstruct typeof*{result_slot} %inner_ptr %inner_len",
                 "OpStore {result_slot} %result",
                 buffer = in(reg) self,
-                result_slot = in(reg) &mut result_slot,
+                result_slot = in(reg) result_slot.as_mut_ptr(),
             }
             result_slot.assume_init()
         }