Rollup merge of #136565 - workingjubilee:fixup-abi-in-target, r=compiler-errors

compiler: Clean up weird `rustc_abi` reexports

Just general cleanup in `rustc_target` and `rustc_abi`. I was originally going to make a PR with a larger change that also fixed the last few crates and in doing so removed some clutter from `rustc_abi`, but wound up slightly stuck on it, then figured out how to fix it, and then got distracted by other things... so now I'm trying to figure out what I had figured out earlier.

Author: matthiaskrgr

compiler/rustc_abi/src/callconv.rs

@@ -1,73 +1,10 @@
-mod abi {
-    pub(crate) use crate::Primitive::*;
-    pub(crate) use crate::Variants;
-}
-
-#[cfg(feature = "nightly")]
-use rustc_macros::HashStable_Generic;
-
-use crate::{Align, HasDataLayout, Size};
 #[cfg(feature = "nightly")]
 use crate::{BackendRepr, FieldsShape, TyAbiInterface, TyAndLayout};
+use crate::{Primitive, Size, Variants};
 
-#[cfg_attr(feature = "nightly", derive(HashStable_Generic))]
-#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
-pub enum RegKind {
-    Integer,
-    Float,
-    Vector,
-}
-
-#[cfg_attr(feature = "nightly", derive(HashStable_Generic))]
-#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
-pub struct Reg {
-    pub kind: RegKind,
-    pub size: Size,
-}
-
-macro_rules! reg_ctor {
-    ($name:ident, $kind:ident, $bits:expr) => {
-        pub fn $name() -> Reg {
-            Reg { kind: RegKind::$kind, size: Size::from_bits($bits) }
-        }
-    };
-}
-
-impl Reg {
-    reg_ctor!(i8, Integer, 8);
-    reg_ctor!(i16, Integer, 16);
-    reg_ctor!(i32, Integer, 32);
-    reg_ctor!(i64, Integer, 64);
-    reg_ctor!(i128, Integer, 128);
-
-    reg_ctor!(f32, Float, 32);
-    reg_ctor!(f64, Float, 64);
-}
+mod reg;
 
-impl Reg {
-    pub fn align<C: HasDataLayout>(&self, cx: &C) -> Align {
-        let dl = cx.data_layout();
-        match self.kind {
-            RegKind::Integer => match self.size.bits() {
-                1 => dl.i1_align.abi,
-                2..=8 => dl.i8_align.abi,
-                9..=16 => dl.i16_align.abi,
-                17..=32 => dl.i32_align.abi,
-                33..=64 => dl.i64_align.abi,
-                65..=128 => dl.i128_align.abi,
-                _ => panic!("unsupported integer: {self:?}"),
-            },
-            RegKind::Float => match self.size.bits() {
-                16 => dl.f16_align.abi,
-                32 => dl.f32_align.abi,
-                64 => dl.f64_align.abi,
-                128 => dl.f128_align.abi,
-                _ => panic!("unsupported float: {self:?}"),
-            },
-            RegKind::Vector => dl.vector_align(self.size).abi,
-        }
-    }
-}
+pub use reg::{Reg, RegKind};
 
 /// Return value from the `homogeneous_aggregate` test function.
 #[derive(Copy, Clone, Debug)]
@@ -134,8 +71,8 @@ impl<'a, Ty> TyAndLayout<'a, Ty> {
             // The primitive for this algorithm.
             BackendRepr::Scalar(scalar) => {
                 let kind = match scalar.primitive() {
-                    abi::Int(..) | abi::Pointer(_) => RegKind::Integer,
-                    abi::Float(_) => RegKind::Float,
+                    Primitive::Int(..) | Primitive::Pointer(_) => RegKind::Integer,
+                    Primitive::Float(_) => RegKind::Float,
                 };
                 Ok(HomogeneousAggregate::Homogeneous(Reg { kind, size: self.size }))
             }
@@ -206,8 +143,8 @@ impl<'a, Ty> TyAndLayout<'a, Ty> {
                 let (mut result, mut total) = from_fields_at(*self, Size::ZERO)?;
 
                 match &self.variants {
-                    abi::Variants::Single { .. } | abi::Variants::Empty => {}
-                    abi::Variants::Multiple { variants, .. } => {
+                    Variants::Single { .. } | Variants::Empty => {}
+                    Variants::Multiple { variants, .. } => {
                         // Treat enum variants like union members.
                         // HACK(eddyb) pretend the `enum` field (discriminant)
                         // is at the start of every variant (otherwise the gap

compiler/rustc_abi/src/callconv/reg.rs

@@ -0,0 +1,63 @@
+#[cfg(feature = "nightly")]
+use rustc_macros::HashStable_Generic;
+
+use crate::{Align, HasDataLayout, Size};
+
+#[cfg_attr(feature = "nightly", derive(HashStable_Generic))]
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
+pub enum RegKind {
+    Integer,
+    Float,
+    Vector,
+}
+
+#[cfg_attr(feature = "nightly", derive(HashStable_Generic))]
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
+pub struct Reg {
+    pub kind: RegKind,
+    pub size: Size,
+}
+
+macro_rules! reg_ctor {
+    ($name:ident, $kind:ident, $bits:expr) => {
+        pub fn $name() -> Reg {
+            Reg { kind: RegKind::$kind, size: Size::from_bits($bits) }
+        }
+    };
+}
+
+impl Reg {
+    reg_ctor!(i8, Integer, 8);
+    reg_ctor!(i16, Integer, 16);
+    reg_ctor!(i32, Integer, 32);
+    reg_ctor!(i64, Integer, 64);
+    reg_ctor!(i128, Integer, 128);
+
+    reg_ctor!(f32, Float, 32);
+    reg_ctor!(f64, Float, 64);
+}
+
+impl Reg {
+    pub fn align<C: HasDataLayout>(&self, cx: &C) -> Align {
+        let dl = cx.data_layout();
+        match self.kind {
+            RegKind::Integer => match self.size.bits() {
+                1 => dl.i1_align.abi,
+                2..=8 => dl.i8_align.abi,
+                9..=16 => dl.i16_align.abi,
+                17..=32 => dl.i32_align.abi,
+                33..=64 => dl.i64_align.abi,
+                65..=128 => dl.i128_align.abi,
+                _ => panic!("unsupported integer: {self:?}"),
+            },
+            RegKind::Float => match self.size.bits() {
+                16 => dl.f16_align.abi,
+                32 => dl.f32_align.abi,
+                64 => dl.f64_align.abi,
+                128 => dl.f128_align.abi,
+                _ => panic!("unsupported float: {self:?}"),
+            },
+            RegKind::Vector => dl.vector_align(self.size).abi,
+        }
+    }
+}

compiler/rustc_abi/src/extern_abi/mod.rs compiler/rustc_abi/src/extern_abi.rs

@@ -1,13 +1,15 @@
 use std::fmt;
 use std::ops::Deref;
 
-use Float::*;
-use Primitive::*;
 use rustc_data_structures::intern::Interned;
 use rustc_macros::HashStable_Generic;
 
+use crate::{
+    AbiAndPrefAlign, Align, BackendRepr, FieldsShape, Float, HasDataLayout, LayoutData, Niche,
+    PointeeInfo, Primitive, Scalar, Size, TargetDataLayout, Variants,
+};
+
 // Explicitly import `Float` to avoid ambiguity with `Primitive::Float`.
-use crate::{Float, *};
 
 rustc_index::newtype_index! {
     /// The *source-order* index of a field in a variant.
@@ -197,7 +199,9 @@ impl<'a, Ty> TyAndLayout<'a, Ty> {
         C: HasDataLayout,
     {
         match self.backend_repr {
-            BackendRepr::Scalar(scalar) => matches!(scalar.primitive(), Float(F32 | F64)),
+            BackendRepr::Scalar(scalar) => {
+                matches!(scalar.primitive(), Primitive::Float(Float::F32 | Float::F64))
+            }
             BackendRepr::Memory { .. } => {
                 if self.fields.count() == 1 && self.fields.offset(0).bytes() == 0 {
                     self.field(cx, 0).is_single_fp_element(cx)

compiler/rustc_abi/src/layout/ty.rs

@@ -1,11 +1,11 @@
 use std::fmt;
 use std::str::FromStr;
 
+use rustc_abi::Size;
 use rustc_data_structures::fx::{FxHashMap, FxIndexSet};
 use rustc_macros::{Decodable, Encodable, HashStable_Generic};
 use rustc_span::Symbol;
 
-use crate::abi::Size;
 use crate::spec::{RelocModel, Target};
 
 pub struct ModifierInfo {

compiler/rustc_target/src/asm/mod.rs

@@ -1,9 +1,8 @@
 use std::iter;
 
-use rustc_abi::{BackendRepr, Primitive};
+use rustc_abi::{BackendRepr, HasDataLayout, Primitive, TyAbiInterface};
 
 use crate::abi::call::{ArgAbi, FnAbi, Reg, RegKind, Uniform};
-use crate::abi::{HasDataLayout, TyAbiInterface};
 use crate::spec::{HasTargetSpec, Target};
 
 /// Indicates the variant of the AArch64 ABI we are compiling for.

compiler/rustc_target/src/callconv/aarch64.rs

@@ -1,5 +1,6 @@
+use rustc_abi::{HasDataLayout, TyAbiInterface};
+
 use crate::abi::call::{ArgAbi, FnAbi};
-use crate::abi::{HasDataLayout, TyAbiInterface};
 
 fn classify_ret<'a, Ty, C>(_cx: &C, ret: &mut ArgAbi<'a, Ty>)
 where

compiler/rustc_target/src/callconv/amdgpu.rs

@@ -1,5 +1,6 @@
+use rustc_abi::{HasDataLayout, TyAbiInterface};
+
 use crate::abi::call::{ArgAbi, Conv, FnAbi, Reg, RegKind, Uniform};
-use crate::abi::{HasDataLayout, TyAbiInterface};
 use crate::spec::HasTargetSpec;
 
 fn is_homogeneous_aggregate<'a, Ty, C>(cx: &C, arg: &mut ArgAbi<'a, Ty>) -> Option<Uniform>

compiler/rustc_target/src/callconv/arm.rs

@@ -1,9 +1,10 @@
-use crate::abi::call::{ArgAbi, ArgExtension, CastTarget, FnAbi, PassMode, Reg, RegKind, Uniform};
-use crate::abi::{
-    self, BackendRepr, FieldsShape, HasDataLayout, Size, TyAbiInterface, TyAndLayout,
+use rustc_abi::{
+    BackendRepr, ExternAbi, FieldsShape, HasDataLayout, Primitive, Reg, RegKind, Size,
+    TyAbiInterface, TyAndLayout, Variants,
 };
+
+use crate::callconv::{ArgAbi, ArgExtension, CastTarget, FnAbi, PassMode, Uniform};
 use crate::spec::HasTargetSpec;
-use crate::spec::abi::Abi as SpecAbi;
 
 #[derive(Copy, Clone)]
 enum RegPassKind {
@@ -42,7 +43,7 @@ where
 {
     match arg_layout.backend_repr {
         BackendRepr::Scalar(scalar) => match scalar.primitive() {
-            abi::Int(..) | abi::Pointer(_) => {
+            Primitive::Int(..) | Primitive::Pointer(_) => {
                 if arg_layout.size.bits() > xlen {
                     return Err(CannotUseFpConv);
                 }
@@ -62,7 +63,7 @@ where
                     _ => return Err(CannotUseFpConv),
                 }
             }
-            abi::Float(_) => {
+            Primitive::Float(_) => {
                 if arg_layout.size.bits() > flen {
                     return Err(CannotUseFpConv);
                 }
@@ -115,8 +116,8 @@ where
             }
             FieldsShape::Arbitrary { .. } => {
                 match arg_layout.variants {
-                    abi::Variants::Multiple { .. } => return Err(CannotUseFpConv),
-                    abi::Variants::Single { .. } | abi::Variants::Empty => (),
+                    Variants::Multiple { .. } => return Err(CannotUseFpConv),
+                    Variants::Single { .. } | Variants::Empty => (),
                 }
                 for i in arg_layout.fields.index_by_increasing_offset() {
                     let field = arg_layout.field(cx, i);
@@ -314,7 +315,7 @@ fn classify_arg<'a, Ty, C>(
 
 fn extend_integer_width<Ty>(arg: &mut ArgAbi<'_, Ty>, xlen: u64) {
     if let BackendRepr::Scalar(scalar) = arg.layout.backend_repr {
-        if let abi::Int(i, _) = scalar.primitive() {
+        if let Primitive::Int(i, _) = scalar.primitive() {
             // 32-bit integers are always sign-extended
             if i.size().bits() == 32 && xlen > 32 {
                 if let PassMode::Direct(ref mut attrs) = arg.mode {
@@ -363,12 +364,12 @@ where
     }
 }
 
-pub(crate) fn compute_rust_abi_info<'a, Ty, C>(cx: &C, fn_abi: &mut FnAbi<'a, Ty>, abi: SpecAbi)
+pub(crate) fn compute_rust_abi_info<'a, Ty, C>(cx: &C, fn_abi: &mut FnAbi<'a, Ty>, abi: ExternAbi)
 where
     Ty: TyAbiInterface<'a, C> + Copy,
     C: HasDataLayout + HasTargetSpec,
 {
-    if abi == SpecAbi::RustIntrinsic {
+    if abi == ExternAbi::RustIntrinsic {
         return;
     }
 

compiler/rustc_target/src/callconv/loongarch.rs

@@ -1,5 +1,6 @@
+use rustc_abi::{HasDataLayout, Size};
+
 use crate::abi::call::{ArgAbi, FnAbi, Reg, Uniform};
-use crate::abi::{HasDataLayout, Size};
 
 fn classify_ret<Ty, C>(cx: &C, ret: &mut ArgAbi<'_, Ty>, offset: &mut Size)
 where

compiler/rustc_target/src/callconv/mips.rs

@@ -1,12 +1,15 @@
-use crate::abi::call::{
-    ArgAbi, ArgAttribute, ArgAttributes, ArgExtension, CastTarget, FnAbi, PassMode, Reg, Uniform,
+use rustc_abi::{
+    BackendRepr, FieldsShape, Float, HasDataLayout, Primitive, Reg, Size, TyAbiInterface,
+};
+
+use crate::callconv::{
+    ArgAbi, ArgAttribute, ArgAttributes, ArgExtension, CastTarget, FnAbi, PassMode, Uniform,
 };
-use crate::abi::{self, HasDataLayout, Size, TyAbiInterface};
 
 fn extend_integer_width_mips<Ty>(arg: &mut ArgAbi<'_, Ty>, bits: u64) {
     // Always sign extend u32 values on 64-bit mips
-    if let abi::BackendRepr::Scalar(scalar) = arg.layout.backend_repr {
-        if let abi::Int(i, signed) = scalar.primitive() {
+    if let BackendRepr::Scalar(scalar) = arg.layout.backend_repr {
+        if let Primitive::Int(i, signed) = scalar.primitive() {
             if !signed && i.size().bits() == 32 {
                 if let PassMode::Direct(ref mut attrs) = arg.mode {
                     attrs.ext(ArgExtension::Sext);
@@ -25,9 +28,9 @@ where
     C: HasDataLayout,
 {
     match ret.layout.field(cx, i).backend_repr {
-        abi::BackendRepr::Scalar(scalar) => match scalar.primitive() {
-            abi::Float(abi::F32) => Some(Reg::f32()),
-            abi::Float(abi::F64) => Some(Reg::f64()),
+        BackendRepr::Scalar(scalar) => match scalar.primitive() {
+            Primitive::Float(Float::F32) => Some(Reg::f32()),
+            Primitive::Float(Float::F64) => Some(Reg::f64()),
             _ => None,
         },
         _ => None,
@@ -51,7 +54,7 @@ where
         // use of float registers to structures (not unions) containing exactly one or two
         // float fields.
 
-        if let abi::FieldsShape::Arbitrary { .. } = ret.layout.fields {
+        if let FieldsShape::Arbitrary { .. } = ret.layout.fields {
             if ret.layout.fields.count() == 1 {
                 if let Some(reg) = float_reg(cx, ret, 0) {
                     ret.cast_to(reg);
@@ -90,16 +93,16 @@ where
     let mut prefix_index = 0;
 
     match arg.layout.fields {
-        abi::FieldsShape::Primitive => unreachable!(),
-        abi::FieldsShape::Array { .. } => {
+        FieldsShape::Primitive => unreachable!(),
+        FieldsShape::Array { .. } => {
             // Arrays are passed indirectly
             arg.make_indirect();
             return;
         }
-        abi::FieldsShape::Union(_) => {
+        FieldsShape::Union(_) => {
             // Unions and are always treated as a series of 64-bit integer chunks
         }
-        abi::FieldsShape::Arbitrary { .. } => {
+        FieldsShape::Arbitrary { .. } => {
             // Structures are split up into a series of 64-bit integer chunks, but any aligned
             // doubles not part of another aggregate are passed as floats.
             let mut last_offset = Size::ZERO;
@@ -109,8 +112,8 @@ where
                 let offset = arg.layout.fields.offset(i);
 
                 // We only care about aligned doubles
-                if let abi::BackendRepr::Scalar(scalar) = field.backend_repr {
-                    if scalar.primitive() == abi::Float(abi::F64) {
+                if let BackendRepr::Scalar(scalar) = field.backend_repr {
+                    if scalar.primitive() == Primitive::Float(Float::F64) {
                         if offset.is_aligned(dl.f64_align.abi) {
                             // Insert enough integers to cover [last_offset, offset)
                             assert!(last_offset.is_aligned(dl.f64_align.abi));