Auto merge of rust-lang#137959 - matthiaskrgr:rollup-62vjvwr, r=matthiaskrgr

Rollup of 12 pull requests

Successful merges:

 - rust-lang#135767 (Future incompatibility warning `unsupported_fn_ptr_calling_conventions`: Also warn in dependencies)
 - rust-lang#137852 (Remove layouting dead code for non-array SIMD types.)
 - rust-lang#137863 (Fix pretty printing of unsafe binders)
 - rust-lang#137882 (do not build additional stage on compiler paths)
 - rust-lang#137894 (Revert "store ScalarPair via memset when one side is undef and the other side can be memset")
 - rust-lang#137902 (Make `ast::TokenKind` more like `lexer::TokenKind`)
 - rust-lang#137921 (Subtree update of `rust-analyzer`)
 - rust-lang#137922 (A few cleanups after the removal of `cfg(not(parallel))`)
 - rust-lang#137939 (fix order on shl impl)
 - rust-lang#137946 (Fix docker run-local docs)
 - rust-lang#137955 (Always allow rustdoc-json tests to contain long lines)
 - rust-lang#137958 (triagebot.toml: Don't label `test/rustdoc-json` as A-rustdoc-search)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

src/common.rs

@@ -64,11 +64,6 @@ impl<'gcc, 'tcx> ConstCodegenMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
         if type_is_pointer(typ) { self.context.new_null(typ) } else { self.const_int(typ, 0) }
     }
 
-    fn is_undef(&self, _val: RValue<'gcc>) -> bool {
-        // FIXME: actually check for undef
-        false
-    }
-
     fn const_undef(&self, typ: Type<'gcc>) -> RValue<'gcc> {
         let local = self.current_func.borrow().expect("func").new_local(None, typ, "undefined");
         if typ.is_struct().is_some() {