diff options
Diffstat (limited to 'compiler')
| -rw-r--r-- | compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs b/compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs index d345368d552..77457c8daaa 100644 --- a/compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs +++ b/compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs @@ -447,7 +447,7 @@ fn encode_ty<'tcx>( typeid.push('b'); } - ty::Int(..) | ty::Uint(..) | ty::Float(..) => { + ty::Int(..) | ty::Uint(..) => { // u<length><type-name> as vendor extended type let mut s = String::from(match ty.kind() { ty::Int(IntTy::I8) => "u2i8", @@ -462,14 +462,23 @@ fn encode_ty<'tcx>( ty::Uint(UintTy::U64) => "u3u64", ty::Uint(UintTy::U128) => "u4u128", ty::Uint(UintTy::Usize) => "u5usize", - ty::Float(FloatTy::F32) => "u3f32", - ty::Float(FloatTy::F64) => "u3f64", - _ => "", + _ => bug!("encode_ty: unexpected `{:?}`", ty.kind()), }); compress(dict, DictKey::Ty(ty, TyQ::None), &mut s); typeid.push_str(&s); } + // Rust's f32 and f64 single (32-bit) and double (64-bit) precision floating-point types + // have IEEE-754 binary32 and binary64 floating-point layouts, respectively. + // + // (See https://rust-lang.github.io/unsafe-code-guidelines/layout/scalars.html#fixed-width-floating-point-types.) + ty::Float(float_ty) => { + typeid.push(match float_ty { + FloatTy::F32 => 'f', + FloatTy::F64 => 'd', + }); + } + ty::Char => { // u4char as vendor extended type let mut s = String::from("u4char"); |