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https://github.com/rust-lang/rust
synced 2024-10-02 14:54:35 +00:00
Do not track span in ConstProp.
This commit is contained in:
Camille GILLOT
parent
2247cd6643
commit
0e64ce7c5e
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@ -17,7 +17,7 @@
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use rustc_middle::ty::layout::{LayoutError, LayoutOf, LayoutOfHelpers, TyAndLayout};
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use rustc_middle::ty::InternalSubsts;
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use rustc_middle::ty::{self, ConstKind, Instance, ParamEnv, Ty, TyCtxt, TypeVisitableExt};
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use rustc_span::{def_id::DefId, Span};
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use rustc_span::{def_id::DefId, Span, DUMMY_SP};
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use rustc_target::abi::{self, Align, HasDataLayout, Size, TargetDataLayout};
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use rustc_target::spec::abi::Abi as CallAbi;
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use rustc_trait_selection::traits;
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@ -328,9 +328,6 @@ struct ConstPropagator<'mir, 'tcx> {
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tcx: TyCtxt<'tcx>,
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param_env: ParamEnv<'tcx>,
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local_decls: &'mir IndexVec<Local, LocalDecl<'tcx>>,
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// Because we have `MutVisitor` we can't obtain the `SourceInfo` from a `Location`. So we store
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// the last known `SourceInfo` here and just keep revisiting it.
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source_info: Option<SourceInfo>,
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}
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impl<'tcx> LayoutOfHelpers<'tcx> for ConstPropagator<'_, 'tcx> {
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@ -411,13 +408,7 @@ fn new(
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)
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.expect("failed to push initial stack frame");
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ConstPropagator {
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ecx,
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tcx,
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param_env,
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local_decls: &dummy_body.local_decls,
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source_info: None,
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}
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ConstPropagator { ecx, tcx, param_env, local_decls: &dummy_body.local_decls }
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}
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fn get_const(&self, place: Place<'tcx>) -> Option<OpTy<'tcx>> {
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@ -495,7 +486,7 @@ fn propagate_operand(&mut self, operand: &mut Operand<'tcx>) {
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*operand = self.operand_from_scalar(
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scalar,
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value.layout.ty,
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self.source_info.unwrap().span,
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DUMMY_SP,
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);
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}
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}
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@ -629,12 +620,7 @@ fn operand_from_scalar(&self, scalar: Scalar, ty: Ty<'tcx>, span: Span) -> Opera
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}))
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}
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fn replace_with_const(
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&mut self,
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rval: &mut Rvalue<'tcx>,
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value: &OpTy<'tcx>,
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source_info: SourceInfo,
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) {
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fn replace_with_const(&mut self, rval: &mut Rvalue<'tcx>, value: &OpTy<'tcx>) {
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if let Rvalue::Use(Operand::Constant(c)) = rval {
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match c.literal {
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ConstantKind::Ty(c) if matches!(c.kind(), ConstKind::Unevaluated(..)) => {}
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@ -664,11 +650,8 @@ fn replace_with_const(
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if let Some(Right(imm)) = imm {
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match *imm {
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interpret::Immediate::Scalar(scalar) => {
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*rval = Rvalue::Use(self.operand_from_scalar(
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scalar,
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value.layout.ty,
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source_info.span,
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));
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*rval =
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Rvalue::Use(self.operand_from_scalar(scalar, value.layout.ty, DUMMY_SP));
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}
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Immediate::ScalarPair(..) => {
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// Found a value represented as a pair. For now only do const-prop if the type
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@ -701,7 +684,7 @@ fn replace_with_const(
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let const_val = ConstValue::ByRef { alloc, offset: Size::ZERO };
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let literal = ConstantKind::Val(const_val, ty);
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*rval = Rvalue::Use(Operand::Constant(Box::new(Constant {
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span: source_info.span,
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span: DUMMY_SP,
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user_ty: None,
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literal,
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})));
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@ -894,8 +877,6 @@ fn visit_constant(&mut self, constant: &mut Constant<'tcx>, location: Location)
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fn visit_statement(&mut self, statement: &mut Statement<'tcx>, location: Location) {
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trace!("visit_statement: {:?}", statement);
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let source_info = statement.source_info;
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self.source_info = Some(source_info);
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match statement.kind {
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StatementKind::Assign(box (place, ref mut rval)) => {
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let can_const_prop = self.ecx.machine.can_const_prop[place.local];
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@ -905,7 +886,7 @@ fn visit_statement(&mut self, statement: &mut Statement<'tcx>, location: Locatio
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// consists solely of uninitialized memory (so it doesn't capture any locals).
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if let Some(ref value) = self.get_const(place) && self.should_const_prop(value) {
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trace!("replacing {:?} with {:?}", rval, value);
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self.replace_with_const(rval, value, source_info);
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self.replace_with_const(rval, value);
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if can_const_prop == ConstPropMode::FullConstProp
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|| can_const_prop == ConstPropMode::OnlyInsideOwnBlock
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{
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@ -977,8 +958,6 @@ fn visit_statement(&mut self, statement: &mut Statement<'tcx>, location: Locatio
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}
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fn visit_terminator(&mut self, terminator: &mut Terminator<'tcx>, location: Location) {
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let source_info = terminator.source_info;
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self.source_info = Some(source_info);
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self.super_terminator(terminator, location);
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match &mut terminator.kind {
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@ -991,7 +970,7 @@ fn visit_terminator(&mut self, terminator: &mut Terminator<'tcx>, location: Loca
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*cond = self.operand_from_scalar(
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value_const,
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self.tcx.types.bool,
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source_info.span,
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DUMMY_SP,
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);
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}
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}
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@ -22,7 +22,7 @@
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- switchInt(move _4) -> [1: bb1, otherwise: bb3]; // scope 2 at $DIR/discriminant.rs:+1:21: +1:31
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+ _3 = const Option::<bool>::Some(true); // scope 2 at $DIR/discriminant.rs:+1:34: +1:44
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+ // mir::Constant
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+ // + span: $DIR/discriminant.rs:12:34: 12:44
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+ // + span: no-location
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+ // + literal: Const { ty: Option<bool>, val: Value(Scalar(0x01)) }
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+ _4 = const 1_isize; // scope 2 at $DIR/discriminant.rs:+1:21: +1:31
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+ switchInt(const 1_isize) -> [1: bb1, otherwise: bb3]; // scope 2 at $DIR/discriminant.rs:+1:21: +1:31
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@ -44,11 +44,11 @@
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- _3 = [move _4]; // scope 1 at $DIR/invalid_constant.rs:+13:24: +13:60
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+ _4 = const Scalar(0x00000004): E; // scope 4 at $DIR/invalid_constant.rs:+13:34: +13:57
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+ // mir::Constant
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+ // + span: $DIR/invalid_constant.rs:28:34: 28:57
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+ // + span: no-location
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+ // + literal: Const { ty: E, val: Value(Scalar(0x00000004)) }
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+ _3 = [const Scalar(0x00000004): E]; // scope 1 at $DIR/invalid_constant.rs:+13:24: +13:60
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+ // mir::Constant
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+ // + span: $DIR/invalid_constant.rs:28:24: 28:60
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+ // + span: no-location
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+ // + literal: Const { ty: E, val: Value(Scalar(0x00000004)) }
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StorageDead(_4); // scope 1 at $DIR/invalid_constant.rs:+13:59: +13:60
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StorageDead(_5); // scope 1 at $DIR/invalid_constant.rs:+13:60: +13:61
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@ -54,7 +54,7 @@
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- _6 = MinusPlus; // scope 1 at $DIR/funky_arms.rs:+10:17: +10:41
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+ _6 = const MinusPlus; // scope 1 at $DIR/funky_arms.rs:+10:17: +10:41
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+ // mir::Constant
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+ // + span: $DIR/funky_arms.rs:21:17: 21:41
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+ // + span: no-location
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+ // + literal: Const { ty: Sign, val: Value(Scalar(0x01)) }
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goto -> bb4; // scope 1 at $DIR/funky_arms.rs:+10:17: +10:41
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}
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@ -63,7 +63,7 @@
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- _6 = Minus; // scope 1 at $DIR/funky_arms.rs:+9:18: +9:38
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+ _6 = const Minus; // scope 1 at $DIR/funky_arms.rs:+9:18: +9:38
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+ // mir::Constant
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+ // + span: $DIR/funky_arms.rs:20:18: 20:38
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+ // + span: no-location
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+ // + literal: Const { ty: Sign, val: Value(Scalar(0x00)) }
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goto -> bb4; // scope 1 at $DIR/funky_arms.rs:+9:18: +9:38
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}
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