Auto merge of #105125 - matthiaskrgr:rollup-fr0snmj, r=matthiaskrgr

Rollup of 4 pull requests

Successful merges:

 - #105078 (Fix `expr_to_spanned_string` ICE)
 - #105087 (Extract llvm datalayout parsing out of spec module)
 - #105088 (rustdoc: remove redundant CSS `div.desc { display: block }`)
 - #105106 (Fix ICE from #105101)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

5 files changed, 107 insertions, 99 deletions

diff --git a/compiler/rustc_abi/src/lib.rs b/compiler/rustc_abi/src/lib.rs
index 4f4a4bf314f..85693259cd0 100644
--- a/compiler/rustc_abi/src/lib.rs
+++ b/compiler/rustc_abi/src/lib.rs
@@ -211,6 +211,102 @@ pub enum TargetDataLayoutErrors<'a> {
 }
 
 impl TargetDataLayout {
+    /// Parse data layout from an [llvm data layout string](https://llvm.org/docs/LangRef.html#data-layout)
+    ///
+    /// This function doesn't fill `c_enum_min_size` and it will always be `I32` since it can not be
+    /// determined from llvm string.
+    pub fn parse_from_llvm_datalayout_string<'a>(
+        input: &'a str,
+    ) -> Result<TargetDataLayout, TargetDataLayoutErrors<'a>> {
+        // Parse an address space index from a string.
+        let parse_address_space = |s: &'a str, cause: &'a str| {
+            s.parse::<u32>().map(AddressSpace).map_err(|err| {
+                TargetDataLayoutErrors::InvalidAddressSpace { addr_space: s, cause, err }
+            })
+        };
+
+        // Parse a bit count from a string.
+        let parse_bits = |s: &'a str, kind: &'a str, cause: &'a str| {
+            s.parse::<u64>().map_err(|err| TargetDataLayoutErrors::InvalidBits {
+                kind,
+                bit: s,
+                cause,
+                err,
+            })
+        };
+
+        // Parse a size string.
+        let size = |s: &'a str, cause: &'a str| parse_bits(s, "size", cause).map(Size::from_bits);
+
+        // Parse an alignment string.
+        let align = |s: &[&'a str], cause: &'a str| {
+            if s.is_empty() {
+                return Err(TargetDataLayoutErrors::MissingAlignment { cause });
+            }
+            let align_from_bits = |bits| {
+                Align::from_bits(bits)
+                    .map_err(|err| TargetDataLayoutErrors::InvalidAlignment { cause, err })
+            };
+            let abi = parse_bits(s[0], "alignment", cause)?;
+            let pref = s.get(1).map_or(Ok(abi), |pref| parse_bits(pref, "alignment", cause))?;
+            Ok(AbiAndPrefAlign { abi: align_from_bits(abi)?, pref: align_from_bits(pref)? })
+        };
+
+        let mut dl = TargetDataLayout::default();
+        let mut i128_align_src = 64;
+        for spec in input.split('-') {
+            let spec_parts = spec.split(':').collect::<Vec<_>>();
+
+            match &*spec_parts {
+                ["e"] => dl.endian = Endian::Little,
+                ["E"] => dl.endian = Endian::Big,
+                [p] if p.starts_with('P') => {
+                    dl.instruction_address_space = parse_address_space(&p[1..], "P")?
+                }
+                ["a", ref a @ ..] => dl.aggregate_align = align(a, "a")?,
+                ["f32", ref a @ ..] => dl.f32_align = align(a, "f32")?,
+                ["f64", ref a @ ..] => dl.f64_align = align(a, "f64")?,
+                [p @ "p", s, ref a @ ..] | [p @ "p0", s, ref a @ ..] => {
+                    dl.pointer_size = size(s, p)?;
+                    dl.pointer_align = align(a, p)?;
+                }
+                [s, ref a @ ..] if s.starts_with('i') => {
+                    let Ok(bits) = s[1..].parse::<u64>() else {
+                        size(&s[1..], "i")?; // For the user error.
+                        continue;
+                    };
+                    let a = align(a, s)?;
+                    match bits {
+                        1 => dl.i1_align = a,
+                        8 => dl.i8_align = a,
+                        16 => dl.i16_align = a,
+                        32 => dl.i32_align = a,
+                        64 => dl.i64_align = a,
+                        _ => {}
+                    }
+                    if bits >= i128_align_src && bits <= 128 {
+                        // Default alignment for i128 is decided by taking the alignment of
+                        // largest-sized i{64..=128}.
+                        i128_align_src = bits;
+                        dl.i128_align = a;
+                    }
+                }
+                [s, ref a @ ..] if s.starts_with('v') => {
+                    let v_size = size(&s[1..], "v")?;
+                    let a = align(a, s)?;
+                    if let Some(v) = dl.vector_align.iter_mut().find(|v| v.0 == v_size) {
+                        v.1 = a;
+                        continue;
+                    }
+                    // No existing entry, add a new one.
+                    dl.vector_align.push((v_size, a));
+                }
+                _ => {} // Ignore everything else.
+            }
+        }
+        Ok(dl)
+    }
+
     /// Returns exclusive upper bound on object size.
     ///
     /// The theoretical maximum object size is defined as the maximum positive `isize` value.
diff --git a/compiler/rustc_builtin_macros/src/deriving/default.rs b/compiler/rustc_builtin_macros/src/deriving/default.rs
index e4e2435848d..e88d2e409c6 100644
--- a/compiler/rustc_builtin_macros/src/deriving/default.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/default.rs
@@ -145,7 +145,7 @@ fn extract_default_variant<'a>(
                 let suggestion = default_variants
                     .iter()
                     .filter_map(|v| {
-                        if v.ident == variant.ident {
+                        if v.span == variant.span {
                             None
                         } else {
                             Some((cx.sess.find_by_name(&v.attrs, kw::Default)?.span, String::new()))
diff --git a/compiler/rustc_expand/src/base.rs b/compiler/rustc_expand/src/base.rs
index 9fe5d588b1f..13e2d1ebbe7 100644
--- a/compiler/rustc_expand/src/base.rs
+++ b/compiler/rustc_expand/src/base.rs
@@ -16,6 +16,7 @@ use rustc_errors::{
 use rustc_lint_defs::builtin::PROC_MACRO_BACK_COMPAT;
 use rustc_lint_defs::{BufferedEarlyLint, BuiltinLintDiagnostics};
 use rustc_parse::{self, parser, MACRO_ARGUMENTS};
+use rustc_session::errors::report_lit_error;
 use rustc_session::{parse::ParseSess, Limit, Session};
 use rustc_span::def_id::{CrateNum, DefId, LocalDefId};
 use rustc_span::edition::Edition;
@@ -1245,7 +1246,10 @@ pub fn expr_to_spanned_string<'a>(
                 Some((err, true))
             }
             Ok(ast::LitKind::Err) => None,
-            Err(_) => None,
+            Err(err) => {
+                report_lit_error(&cx.sess.parse_sess, err, token_lit, expr.span);
+                None
+            }
             _ => Some((cx.struct_span_err(expr.span, err_msg), false)),
         },
         ast::ExprKind::Err => None,
diff --git a/compiler/rustc_session/src/errors.rs b/compiler/rustc_session/src/errors.rs
index 2f7055e3cc5..9aa8a06c6d3 100644
--- a/compiler/rustc_session/src/errors.rs
+++ b/compiler/rustc_session/src/errors.rs
@@ -197,12 +197,12 @@ pub enum UnleashedFeatureHelp {
 
 #[derive(Diagnostic)]
 #[diag(session_invalid_literal_suffix)]
-pub(crate) struct InvalidLiteralSuffix {
+pub(crate) struct InvalidLiteralSuffix<'a> {
     #[primary_span]
     #[label]
     pub span: Span,
     // FIXME(#100717)
-    pub kind: String,
+    pub kind: &'a str,
     pub suffix: Symbol,
 }
 
@@ -311,11 +311,7 @@ pub fn report_lit_error(sess: &ParseSess, err: LitError, lit: token::Lit, span:
         LitError::LexerError => {}
         LitError::InvalidSuffix => {
             if let Some(suffix) = suffix {
-                sess.emit_err(InvalidLiteralSuffix {
-                    span,
-                    kind: format!("{}", kind.descr()),
-                    suffix,
-                });
+                sess.emit_err(InvalidLiteralSuffix { span, kind: kind.descr(), suffix });
             }
         }
         LitError::InvalidIntSuffix => {
diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs
index 0f8cfd7f538..78315afa759 100644
--- a/compiler/rustc_target/src/spec/mod.rs
+++ b/compiler/rustc_target/src/spec/mod.rs
@@ -35,10 +35,7 @@
 //! to the list specified by the target, rather than replace.
 
 use crate::abi::call::Conv;
-use crate::abi::{
-    AbiAndPrefAlign, AddressSpace, Align, Endian, Integer, Size, TargetDataLayout,
-    TargetDataLayoutErrors,
-};
+use crate::abi::{Endian, Integer, Size, TargetDataLayout, TargetDataLayoutErrors};
 use crate::json::{Json, ToJson};
 use crate::spec::abi::{lookup as lookup_abi, Abi};
 use crate::spec::crt_objects::{CrtObjects, LinkSelfContainedDefault};
@@ -1322,92 +1319,7 @@ pub struct Target {
 
 impl Target {
     pub fn parse_data_layout<'a>(&'a self) -> Result<TargetDataLayout, TargetDataLayoutErrors<'a>> {
-        // Parse an address space index from a string.
-        let parse_address_space = |s: &'a str, cause: &'a str| {
-            s.parse::<u32>().map(AddressSpace).map_err(|err| {
-                TargetDataLayoutErrors::InvalidAddressSpace { addr_space: s, cause, err }
-            })
-        };
-
-        // Parse a bit count from a string.
-        let parse_bits = |s: &'a str, kind: &'a str, cause: &'a str| {
-            s.parse::<u64>().map_err(|err| TargetDataLayoutErrors::InvalidBits {
-                kind,
-                bit: s,
-                cause,
-                err,
-            })
-        };
-
-        // Parse a size string.
-        let size = |s: &'a str, cause: &'a str| parse_bits(s, "size", cause).map(Size::from_bits);
-
-        // Parse an alignment string.
-        let align = |s: &[&'a str], cause: &'a str| {
-            if s.is_empty() {
-                return Err(TargetDataLayoutErrors::MissingAlignment { cause });
-            }
-            let align_from_bits = |bits| {
-                Align::from_bits(bits)
-                    .map_err(|err| TargetDataLayoutErrors::InvalidAlignment { cause, err })
-            };
-            let abi = parse_bits(s[0], "alignment", cause)?;
-            let pref = s.get(1).map_or(Ok(abi), |pref| parse_bits(pref, "alignment", cause))?;
-            Ok(AbiAndPrefAlign { abi: align_from_bits(abi)?, pref: align_from_bits(pref)? })
-        };
-
-        let mut dl = TargetDataLayout::default();
-        let mut i128_align_src = 64;
-        for spec in self.data_layout.split('-') {
-            let spec_parts = spec.split(':').collect::<Vec<_>>();
-
-            match &*spec_parts {
-                ["e"] => dl.endian = Endian::Little,
-                ["E"] => dl.endian = Endian::Big,
-                [p] if p.starts_with('P') => {
-                    dl.instruction_address_space = parse_address_space(&p[1..], "P")?
-                }
-                ["a", ref a @ ..] => dl.aggregate_align = align(a, "a")?,
-                ["f32", ref a @ ..] => dl.f32_align = align(a, "f32")?,
-                ["f64", ref a @ ..] => dl.f64_align = align(a, "f64")?,
-                [p @ "p", s, ref a @ ..] | [p @ "p0", s, ref a @ ..] => {
-                    dl.pointer_size = size(s, p)?;
-                    dl.pointer_align = align(a, p)?;
-                }
-                [s, ref a @ ..] if s.starts_with('i') => {
-                    let Ok(bits) = s[1..].parse::<u64>() else {
-                        size(&s[1..], "i")?; // For the user error.
-                        continue;
-                    };
-                    let a = align(a, s)?;
-                    match bits {
-                        1 => dl.i1_align = a,
-                        8 => dl.i8_align = a,
-                        16 => dl.i16_align = a,
-                        32 => dl.i32_align = a,
-                        64 => dl.i64_align = a,
-                        _ => {}
-                    }
-                    if bits >= i128_align_src && bits <= 128 {
-                        // Default alignment for i128 is decided by taking the alignment of
-                        // largest-sized i{64..=128}.
-                        i128_align_src = bits;
-                        dl.i128_align = a;
-                    }
-                }
-                [s, ref a @ ..] if s.starts_with('v') => {
-                    let v_size = size(&s[1..], "v")?;
-                    let a = align(a, s)?;
-                    if let Some(v) = dl.vector_align.iter_mut().find(|v| v.0 == v_size) {
-                        v.1 = a;
-                        continue;
-                    }
-                    // No existing entry, add a new one.
-                    dl.vector_align.push((v_size, a));
-                }
-                _ => {} // Ignore everything else.
-            }
-        }
+        let mut dl = TargetDataLayout::parse_from_llvm_datalayout_string(&self.data_layout)?;
 
         // Perform consistency checks against the Target information.
         if dl.endian != self.endian {