Rollup merge of rust-lang#121598 - RalfJung:catch_unwind, r=oli-obk

rename 'try' intrinsic to 'catch_unwind'

The intrinsic has nothing to do with `try` blocks, and corresponds to the stable `catch_unwind` function, so this makes a lot more sense IMO.

Also rename Miri's special function while we are at it, to reflect the level of abstraction it works on: it's an unwinding mechanism, on which Rust implements panics.

src/intrinsics/mod.rs

@@ -23,7 +23,7 @@ use rustc_middle::ty::layout::{HasParamEnv, ValidityRequirement};
 use rustc_middle::ty::print::{with_no_trimmed_paths, with_no_visible_paths};
 use rustc_middle::ty::GenericArgsRef;
 use rustc_span::source_map::Spanned;
-use rustc_span::symbol::{kw, sym, Symbol};
+use rustc_span::symbol::{sym, Symbol};
 
 pub(crate) use self::llvm::codegen_llvm_intrinsic_call;
 use crate::prelude::*;
@@ -1132,7 +1132,7 @@ fn codegen_regular_intrinsic_call<'tcx>(
             ret.write_cvalue(fx, val);
         }
 
-        kw::Try => {
+        sym::catch_unwind => {
             intrinsic_args!(fx, args => (f, data, catch_fn); intrinsic);
             let f = f.load_scalar(fx);
             let data = data.load_scalar(fx);