bjoernager/rust
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Only clone mir body if tcx.features().ergonomic_clones()

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This commit is contained in:
Santiago Pastorino 2025-04-07 16:47:22 -03:00
parent d6ad9e6191
commit 4a0ea02e3a
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GPG key ID: 8131A24E0C79EFAF
1 changed files with 10 additions and 8 deletions
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18
compiler/rustc_codegen_ssa/src/mir/mod.rs
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@ -173,12 +173,7 @@ pub fn codegen_mir<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
let tcx = cx.tcx();
let llfn = cx.get_fn(instance);
let mir = tcx.instance_mir(instance.def);
let mir = instance.instantiate_mir_and_normalize_erasing_regions(
tcx,
ty::TypingEnv::fully_monomorphized(),
ty::EarlyBinder::bind(mir.clone()),
);
let mut mir = tcx.instance_mir(instance.def);
let fn_abi = cx.fn_abi_of_instance(instance, ty::List::empty());
debug!("fn_abi: {:?}", fn_abi);
@ -188,6 +183,15 @@ pub fn codegen_mir<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
return;
}
if tcx.features().ergonomic_clones() {
let monomorphized_mir = instance.instantiate_mir_and_normalize_erasing_regions(
tcx,
ty::TypingEnv::fully_monomorphized(),
ty::EarlyBinder::bind(mir.clone()),
);
mir = tcx.arena.alloc(optimize_use_clone::<Bx>(cx, monomorphized_mir));
}
let debug_context = cx.create_function_debug_context(instance, fn_abi, llfn, &mir);
let start_llbb = Bx::append_block(cx, llfn, "start");
@ -210,8 +214,6 @@ pub fn codegen_mir<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
})
.collect();
let mir = tcx.arena.alloc(optimize_use_clone::<Bx>(cx, mir));
let mut fx = FunctionCx {
instance,
mir,