Disable non-required MIR opts with optimize(none)

Author: clubby789

compiler/rustc_attr/src/builtin.rs

@@ -63,6 +63,12 @@ pub enum OptimizeAttr {
     Size,
 }
 
+impl OptimizeAttr {
+    pub fn do_not_optimize(&self) -> bool {
+        matches!(self, Self::None)
+    }
+}
+
 /// Represents the following attributes:
 ///
 /// - `#[stable]`

compiler/rustc_mir_transform/src/abort_unwinding_calls.rs

@@ -116,4 +116,8 @@ impl<'tcx> crate::MirPass<'tcx> for AbortUnwindingCalls {
         // We may have invalidated some `cleanup` blocks so clean those up now.
         super::simplify::remove_dead_blocks(body);
     }
+
+    fn is_required(&self) -> bool {
+        true
+    }
 }

compiler/rustc_mir_transform/src/add_call_guards.rs

@@ -75,4 +75,8 @@ impl<'tcx> crate::MirPass<'tcx> for AddCallGuards {
 
         body.basic_blocks_mut().extend(new_blocks);
     }
+
+    fn is_required(&self) -> bool {
+        true
+    }
 }

compiler/rustc_mir_transform/src/add_moves_for_packed_drops.rs

@@ -68,6 +68,10 @@ impl<'tcx> crate::MirPass<'tcx> for AddMovesForPackedDrops {
 
         patch.apply(body);
     }
+
+    fn is_required(&self) -> bool {
+        true
+    }
 }
 
 fn add_move_for_packed_drop<'tcx>(

compiler/rustc_mir_transform/src/add_retag.rs

@@ -176,4 +176,8 @@ impl<'tcx> crate::MirPass<'tcx> for AddRetag {
             }
         }
     }
+
+    fn is_required(&self) -> bool {
+        true
+    }
 }

compiler/rustc_mir_transform/src/add_subtyping_projections.rs

@@ -61,4 +61,8 @@ impl<'tcx> crate::MirPass<'tcx> for Subtyper {
         }
         checker.patcher.apply(body);
     }
+
+    fn is_required(&self) -> bool {
+        true
+    }
 }

compiler/rustc_mir_transform/src/check_alignment.rs

@@ -60,6 +60,10 @@ impl<'tcx> crate::MirPass<'tcx> for CheckAlignment {
             }
         }
     }
+
+    fn is_required(&self) -> bool {
+        true
+    }
 }
 
 struct PointerFinder<'a, 'tcx> {

compiler/rustc_mir_transform/src/cleanup_post_borrowck.rs

@@ -72,4 +72,8 @@ impl<'tcx> crate::MirPass<'tcx> for CleanupPostBorrowck {
             decl.user_ty = None;
         }
     }
+
+    fn is_required(&self) -> bool {
+        true
+    }
 }

compiler/rustc_mir_transform/src/copy_prop.rs

@@ -56,6 +56,10 @@ impl<'tcx> crate::MirPass<'tcx> for CopyProp {
             crate::simplify::remove_unused_definitions(body);
         }
     }
+
+    fn is_required(&self) -> bool {
+        false
+    }
 }
 
 /// `SsaLocals` computed equivalence classes between locals considering copy/move assignments.

compiler/rustc_mir_transform/src/coroutine.rs

@@ -1689,6 +1689,10 @@ impl<'tcx> crate::MirPass<'tcx> for StateTransform {
         // Run derefer to fix Derefs that are not in the first place
         deref_finder(tcx, body);
     }
+
+    fn is_required(&self) -> bool {
+        true
+    }
 }
 
 /// Looks for any assignments between locals (e.g., `_4 = _5`) that will both be converted to fields

compiler/rustc_mir_transform/src/coverage/mod.rs

@@ -65,6 +65,10 @@ impl<'tcx> crate::MirPass<'tcx> for InstrumentCoverage {
 
         instrument_function_for_coverage(tcx, mir_body);
     }
+
+    fn is_required(&self) -> bool {
+        false
+    }
 }
 
 fn instrument_function_for_coverage<'tcx>(tcx: TyCtxt<'tcx>, mir_body: &mut mir::Body<'tcx>) {

compiler/rustc_mir_transform/src/cross_crate_inline.rs

@@ -69,7 +69,8 @@ fn cross_crate_inlinable(tcx: TyCtxt<'_>, def_id: LocalDefId) -> bool {
     // Don't do any inference if codegen optimizations are disabled and also MIR inlining is not
     // enabled. This ensures that we do inference even if someone only passes -Zinline-mir,
     // which is less confusing than having to also enable -Copt-level=1.
-    if matches!(tcx.sess.opts.optimize, OptLevel::No) && !pm::should_run_pass(tcx, &inline::Inline)
+    if matches!(tcx.sess.opts.optimize, OptLevel::No)
+        && !pm::should_run_pass(tcx, &inline::Inline, false)
     {
         return false;
     }

compiler/rustc_mir_transform/src/ctfe_limit.rs

@@ -36,6 +36,10 @@ impl<'tcx> crate::MirPass<'tcx> for CtfeLimit {
             );
         }
     }
+
+    fn is_required(&self) -> bool {
+        true
+    }
 }
 
 fn has_back_edge(

compiler/rustc_mir_transform/src/dataflow_const_prop.rs

@@ -71,6 +71,10 @@ impl<'tcx> crate::MirPass<'tcx> for DataflowConstProp {
         let mut patch = visitor.patch;
         debug_span!("patch").in_scope(|| patch.visit_body_preserves_cfg(body));
     }
+
+    fn is_required(&self) -> bool {
+        false
+    }
 }
 
 // Note: Currently, places that have their reference taken cannot be tracked. Although this would

compiler/rustc_mir_transform/src/dead_store_elimination.rs

@@ -147,4 +147,8 @@ impl<'tcx> crate::MirPass<'tcx> for DeadStoreElimination {
     fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
         eliminate(tcx, body);
     }
+
+    fn is_required(&self) -> bool {
+        false
+    }
 }

compiler/rustc_mir_transform/src/deduplicate_blocks.rs

@@ -31,6 +31,10 @@ impl<'tcx> crate::MirPass<'tcx> for DeduplicateBlocks {
             simplify_cfg(body);
         }
     }
+
+    fn is_required(&self) -> bool {
+        false
+    }
 }
 
 struct OptApplier<'tcx> {

compiler/rustc_mir_transform/src/deref_separator.rs

@@ -81,4 +81,8 @@ impl<'tcx> crate::MirPass<'tcx> for Derefer {
     fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
         deref_finder(tcx, body);
     }
+
+    fn is_required(&self) -> bool {
+        true
+    }
 }

compiler/rustc_mir_transform/src/dest_prop.rs

@@ -239,6 +239,10 @@ impl<'tcx> crate::MirPass<'tcx> for DestinationPropagation {
 
         trace!(round_count);
     }
+
+    fn is_required(&self) -> bool {
+        false
+    }
 }
 
 #[derive(Debug, Default)]

compiler/rustc_mir_transform/src/dump_mir.rs

@@ -15,6 +15,10 @@ impl<'tcx> crate::MirPass<'tcx> for Marker {
     }
 
     fn run_pass(&self, _tcx: TyCtxt<'tcx>, _body: &mut Body<'tcx>) {}
+
+    fn is_required(&self) -> bool {
+        false
+    }
 }
 
 pub fn emit_mir(tcx: TyCtxt<'_>) -> io::Result<()> {

compiler/rustc_mir_transform/src/early_otherwise_branch.rs

@@ -210,6 +210,10 @@ impl<'tcx> crate::MirPass<'tcx> for EarlyOtherwiseBranch {
             simplify_cfg(body);
         }
     }
+
+    fn is_required(&self) -> bool {
+        false
+    }
 }
 
 #[derive(Debug)]

compiler/rustc_mir_transform/src/elaborate_box_derefs.rs

@@ -149,4 +149,8 @@ impl<'tcx> crate::MirPass<'tcx> for ElaborateBoxDerefs {
             }
         }
     }
+
+    fn is_required(&self) -> bool {
+        true
+    }
 }

compiler/rustc_mir_transform/src/elaborate_drops.rs

@@ -88,6 +88,10 @@ impl<'tcx> crate::MirPass<'tcx> for ElaborateDrops {
         elaborate_patch.apply(body);
         deref_finder(tcx, body);
     }
+
+    fn is_required(&self) -> bool {
+        true
+    }
 }
 
 /// Records unwind edges which are known to be unreachable, because they are in `drop` terminators

compiler/rustc_mir_transform/src/gvn.rs

@@ -163,6 +163,10 @@ impl<'tcx> crate::MirPass<'tcx> for GVN {
         // statements.
         StorageRemover { tcx, reused_locals: state.reused_locals }.visit_body_preserves_cfg(body);
     }
+
+    fn is_required(&self) -> bool {
+        false
+    }
 }
 
 newtype_index! {

compiler/rustc_mir_transform/src/inline.rs

@@ -73,6 +73,10 @@ impl<'tcx> crate::MirPass<'tcx> for Inline {
             deref_finder(tcx, body);
         }
     }
+
+    fn is_required(&self) -> bool {
+        false
+    }
 }
 
 fn inline<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) -> bool {

compiler/rustc_mir_transform/src/instsimplify.rs

@@ -61,6 +61,10 @@ impl<'tcx> crate::MirPass<'tcx> for InstSimplify {
             simplify_duplicate_switch_targets(block.terminator.as_mut().unwrap());
         }
     }
+
+    fn is_required(&self) -> bool {
+        false
+    }
 }
 
 struct InstSimplifyContext<'a, 'tcx> {

compiler/rustc_mir_transform/src/jump_threading.rs

@@ -106,6 +106,10 @@ impl<'tcx> crate::MirPass<'tcx> for JumpThreading {
         }
         OpportunitySet::new(body, opportunities).apply(body);
     }
+
+    fn is_required(&self) -> bool {
+        false
+    }
 }
 
 #[derive(Debug)]

compiler/rustc_mir_transform/src/large_enums.rs

@@ -200,6 +200,10 @@ impl<'tcx> crate::MirPass<'tcx> for EnumSizeOpt {
             });
         }
     }
+
+    fn is_required(&self) -> bool {
+        false
+    }
 }
 
 impl EnumSizeOpt {