Fix inconsistent symbol mangling of integers constants with -Zverbose

The `PrettyPrinter` changes formatting of array size and integer
constants based on `-Zverbose`, so its implementation cannot be used in
legacy symbol mangling.

compiler/rustc_symbol_mangling/src/legacy.rs

@@ -216,7 +216,7 @@ fn print_region(self, _region: ty::Region<'_>) -> Result<Self::Region, Self::Err
         Ok(self)
     }
 
-    fn print_type(self, ty: Ty<'tcx>) -> Result<Self::Type, Self::Error> {
+    fn print_type(mut self, ty: Ty<'tcx>) -> Result<Self::Type, Self::Error> {
         match *ty.kind() {
             // Print all nominal types as paths (unlike `pretty_print_type`).
             ty::FnDef(def_id, substs)
@@ -224,6 +224,24 @@ fn print_type(self, ty: Ty<'tcx>) -> Result<Self::Type, Self::Error> {
             | ty::Projection(ty::ProjectionTy { item_def_id: def_id, substs })
             | ty::Closure(def_id, substs)
             | ty::Generator(def_id, substs, _) => self.print_def_path(def_id, substs),
+
+            // The `pretty_print_type` formatting of array size depends on
+            // -Zverbose flag, so we cannot reuse it here.
+            ty::Array(ty, size) => {
+                self.write_str("[")?;
+                self = self.print_type(ty)?;
+                self.write_str("; ")?;
+                if let Some(size) = size.val().try_to_bits(self.tcx().data_layout.pointer_size) {
+                    write!(self, "{}", size)?
+                } else if let ty::ConstKind::Param(param) = size.val() {
+                    self = param.print(self)?
+                } else {
+                    self.write_str("_")?
+                }
+                self.write_str("]")?;
+                Ok(self)
+            }
+
             _ => self.pretty_print_type(ty),
         }
     }
@@ -245,12 +263,22 @@ fn print_dyn_existential(
 
     fn print_const(self, ct: ty::Const<'tcx>) -> Result<Self::Const, Self::Error> {
         // only print integers
-        if let ty::ConstKind::Value(ConstValue::Scalar(Scalar::Int { .. })) = ct.val() {
-            if ct.ty().is_integral() {
-                return self.pretty_print_const(ct, true);
+        match (ct.val(), ct.ty().kind()) {
+            (
+                ty::ConstKind::Value(ConstValue::Scalar(Scalar::Int(scalar))),
+                ty::Int(_) | ty::Uint(_),
+            ) => {
+                // The `pretty_print_const` formatting depends on -Zverbose
+                // flag, so we cannot reuse it here.
+                let signed = matches!(ct.ty().kind(), ty::Int(_));
+                write!(
+                    self,
+                    "{:#?}",
+                    ty::ConstInt::new(scalar, signed, ct.ty().is_ptr_sized_integral())
+                )?;
             }
+            _ => self.write_str("_")?,
         }
-        self.write_str("_")?;
         Ok(self)
     }
 

src/test/ui/symbol-names/types.rs

 // build-fail
-// revisions: legacy
+// revisions: legacy verbose-legacy
 // compile-flags: --crate-name=a -C symbol-mangling-version=legacy -Z unstable-options
-//
+//[verbose-legacy]compile-flags: -Zverbose
 // normalize-stderr-test: "h[[:xdigit:]]{16}" -> "h[HASH]"
 
 #![feature(never_type)]

src/test/ui/symbol-names/types.verbose-legacy.stderr

+error: symbol-name(_ZN1a1b16Type$LT$bool$GT$17h[HASH]E)
+  --> $DIR/types.rs:13:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<bool>::h[HASH])
+  --> $DIR/types.rs:13:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<bool>)
+  --> $DIR/types.rs:13:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b16Type$LT$char$GT$17h[HASH]E)
+  --> $DIR/types.rs:19:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<char>::h[HASH])
+  --> $DIR/types.rs:19:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<char>)
+  --> $DIR/types.rs:19:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b14Type$LT$i8$GT$17h[HASH]E)
+  --> $DIR/types.rs:25:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<i8>::h[HASH])
+  --> $DIR/types.rs:25:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<i8>)
+  --> $DIR/types.rs:25:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b15Type$LT$i16$GT$17h[HASH]E)
+  --> $DIR/types.rs:31:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<i16>::h[HASH])
+  --> $DIR/types.rs:31:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<i16>)
+  --> $DIR/types.rs:31:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b15Type$LT$i32$GT$17h[HASH]E)
+  --> $DIR/types.rs:37:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<i32>::h[HASH])
+  --> $DIR/types.rs:37:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<i32>)
+  --> $DIR/types.rs:37:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b15Type$LT$i64$GT$17h[HASH]E)
+  --> $DIR/types.rs:43:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<i64>::h[HASH])
+  --> $DIR/types.rs:43:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<i64>)
+  --> $DIR/types.rs:43:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b14Type$LT$u8$GT$17h[HASH]E)
+  --> $DIR/types.rs:49:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<u8>::h[HASH])
+  --> $DIR/types.rs:49:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<u8>)
+  --> $DIR/types.rs:49:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b15Type$LT$u16$GT$17h[HASH]E)
+  --> $DIR/types.rs:55:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<u16>::h[HASH])
+  --> $DIR/types.rs:55:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<u16>)
+  --> $DIR/types.rs:55:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b15Type$LT$u32$GT$17h[HASH]E)
+  --> $DIR/types.rs:61:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<u32>::h[HASH])
+  --> $DIR/types.rs:61:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<u32>)
+  --> $DIR/types.rs:61:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b15Type$LT$u64$GT$17h[HASH]E)
+  --> $DIR/types.rs:67:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<u64>::h[HASH])
+  --> $DIR/types.rs:67:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<u64>)
+  --> $DIR/types.rs:67:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b15Type$LT$f32$GT$17h[HASH]E)
+  --> $DIR/types.rs:73:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<f32>::h[HASH])
+  --> $DIR/types.rs:73:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<f32>)
+  --> $DIR/types.rs:73:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b15Type$LT$f64$GT$17h[HASH]E)
+  --> $DIR/types.rs:79:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<f64>::h[HASH])
+  --> $DIR/types.rs:79:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<f64>)
+  --> $DIR/types.rs:79:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b15Type$LT$str$GT$17h[HASH]E)
+  --> $DIR/types.rs:85:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<str>::h[HASH])
+  --> $DIR/types.rs:85:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<str>)
+  --> $DIR/types.rs:85:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b17Type$LT$$u21$$GT$17h[HASH]E)
+  --> $DIR/types.rs:91:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<!>::h[HASH])
+  --> $DIR/types.rs:91:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<!>)
+  --> $DIR/types.rs:91:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b20Type$LT$$LP$$RP$$GT$17h[HASH]E)
+  --> $DIR/types.rs:97:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<()>::h[HASH])
+  --> $DIR/types.rs:97:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<()>)
+  --> $DIR/types.rs:97:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b25Type$LT$$LP$u8$C$$RP$$GT$17h[HASH]E)
+  --> $DIR/types.rs:103:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<(u8,)>::h[HASH])
+  --> $DIR/types.rs:103:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<(u8,)>)
+  --> $DIR/types.rs:103:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b28Type$LT$$LP$u8$C$u16$RP$$GT$17h[HASH]E)
+  --> $DIR/types.rs:109:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<(u8,u16)>::h[HASH])
+  --> $DIR/types.rs:109:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<(u8,u16)>)
+  --> $DIR/types.rs:109:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b34Type$LT$$LP$u8$C$u16$C$u32$RP$$GT$17h[HASH]E)
+  --> $DIR/types.rs:115:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<(u8,u16,u32)>::h[HASH])
+  --> $DIR/types.rs:115:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<(u8,u16,u32)>)
+  --> $DIR/types.rs:115:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b28Type$LT$$BP$const$u20$u8$GT$17h[HASH]E)
+  --> $DIR/types.rs:121:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<*const u8>::h[HASH])
+  --> $DIR/types.rs:121:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<*const u8>)
+  --> $DIR/types.rs:121:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b26Type$LT$$BP$mut$u20$u8$GT$17h[HASH]E)
+  --> $DIR/types.rs:127:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<*mut u8>::h[HASH])
+  --> $DIR/types.rs:127:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<*mut u8>)
+  --> $DIR/types.rs:127:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b19Type$LT$$RF$str$GT$17h[HASH]E)
+  --> $DIR/types.rs:133:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<&str>::h[HASH])
+  --> $DIR/types.rs:133:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<&str>)
+  --> $DIR/types.rs:133:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b27Type$LT$$RF$mut$u20$str$GT$17h[HASH]E)
+  --> $DIR/types.rs:139:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<&mut str>::h[HASH])
+  --> $DIR/types.rs:139:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<&mut str>)
+  --> $DIR/types.rs:139:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b35Type$LT$$u5b$u8$u3b$$u20$0$u5d$$GT$17h[HASH]E)
+  --> $DIR/types.rs:145:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<[u8; 0]>::h[HASH])
+  --> $DIR/types.rs:145:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<[u8; 0]>)
+  --> $DIR/types.rs:145:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b22Type$LT$fn$LP$$RP$$GT$17h[HASH]E)
+  --> $DIR/types.rs:151:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<fn()>::h[HASH])
+  --> $DIR/types.rs:151:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<fn()>)
+  --> $DIR/types.rs:151:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b60Type$LT$unsafe$u20$extern$u20$$u22$C$u22$$u20$fn$LP$$RP$$GT$17h[HASH]E)
+  --> $DIR/types.rs:157:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<unsafe extern "C" fn()>::h[HASH])
+  --> $DIR/types.rs:157:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<unsafe extern "C" fn()>)
+  --> $DIR/types.rs:157:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_ZN1a1b34Type$LT$$u5b$T$u3b$$u20$N$u5d$$GT$17h[HASH]E)
+  --> $DIR/types.rs:163:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(a::b::Type<[T; N]>::h[HASH])
+  --> $DIR/types.rs:163:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(a::b::Type<[T; N]>)
+  --> $DIR/types.rs:163:5
+   |
+LL |     #[rustc_symbol_name]
+   |     ^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 78 previous errors
+