FIX: Remove nvptx target architecture conditions. (Rust-GPU#145)

32-bit support was removed in ef4fcc8. Updates attributes to match.
Fixes numerous warnings when compiling with newer nightly.

Author: jorge-ortega

crates/cuda_std/src/lib.rs

@@ -76,15 +76,15 @@ pub mod prelude {
     };
 }
 
-#[cfg(any(target_arch = "nvptx", target_arch = "nvptx64"))]
+#[cfg(target_arch = "nvptx64")]
 #[alloc_error_handler]
 fn alloc_handler(layout: core::alloc::Layout) -> ! {
     core::panic!("Memory allocation of {} bytes failed", layout.size());
 }
 
 // FIXME(RDambrosio016): For some very odd reason, this function causes an InvalidAddress error when called,
 // despite it having no reason for doing that. It needs more debugging to see what is causing it exactly. For now we just trap.
-#[cfg(any(target_arch = "nvptx", target_arch = "nvptx64"))]
+#[cfg(target_arch = "nvptx64")]
 #[panic_handler]
 fn panic(_info: &core::panic::PanicInfo) -> ! {
     // use crate::prelude::*;

crates/cuda_std_macros/src/lib.rs

@@ -27,7 +27,7 @@ pub fn kernel(input: proc_macro::TokenStream, item: proc_macro::TokenStream) ->
     let mut item = parse_macro_input!(item as ItemFn);
     let no_mangle = parse_quote!(#[no_mangle]);
     item.attrs.push(no_mangle);
-    let internal = parse_quote!(#[cfg_attr(any(target_arch="nvptx", target_arch="nvptx64"), nvvm_internal(kernel(#input)))]);
+    let internal = parse_quote!(#[cfg_attr(target_arch="nvptx64", nvvm_internal(kernel(#input)))]);
     item.attrs.push(internal);
 
     // used to guarantee some things about how params are passed in the codegen.
@@ -170,13 +170,13 @@ pub fn gpu_only(_attr: proc_macro::TokenStream, item: proc_macro::TokenStream) -
     };
 
     let output = quote::quote! {
-        #[cfg(not(any(target_arch="nvptx", target_arch="nvptx64")))]
+        #[cfg(not(target_arch="nvptx64"))]
         #[allow(unused_variables)]
         #(#cloned_attrs)* #vis #sig_cpu {
             unimplemented!(concat!("`", stringify!(#fn_name), "` can only be used on the GPU with rustc_codegen_nvvm"))
         }
 
-        #[cfg(any(target_arch="nvptx", target_arch="nvptx64"))]
+        #[cfg(target_arch="nvptx64")]
         #(#attrs)* #vis #sig {
             #block
         }