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account for endianness in debuginfo for const args

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This commit is contained in:
b-naber 2022-06-14 10:50:20 +02:00
parent 060acc97db
commit e14b34c386
2 changed files with 8 additions and 5 deletions
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9
compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs
View File

@ -707,12 +707,15 @@ fn push_const_param<'tcx>(tcx: TyCtxt<'tcx>, ct: ty::Const<'tcx>, output: &mut S
hcx.while_hashing_spans(false, |hcx| ct.to_valtree().hash_stable(hcx, &mut hasher));
// Let's only emit 64 bits of the hash value. That should be plenty for
// avoiding collisions and will make the emitted type names shorter.
let hash: u64 = hasher.finish();
// Note: Don't use `StableHashResult` impl of `u64` here directly, since that
// would lead to endianness problems.
let hash: u128 = hasher.finish();
let hash_short = (hash.to_le() as u64).to_le();
if cpp_like_debuginfo(tcx) {
write!(output, "CONST${:x}", hash)
write!(output, "CONST${:x}", hash_short)
} else {
write!(output, "{{CONST#{:x}}}", hash)
write!(output, "{{CONST#{:x}}}", hash_short)
}
}
},

4
src/test/debuginfo/function-names.rs
View File

@ -37,7 +37,7 @@
// Const generic parameter
// gdb-command:info functions -q function_names::const_generic_fn.*
// gdb-check:[...]static fn function_names::const_generic_fn_bool<false>();
// gdb-check:[...]static fn function_names::const_generic_fn_non_int<{CONST#3fcd7c34c1555be6}>();
// gdb-check:[...]static fn function_names::const_generic_fn_non_int<{CONST#6348c650c7b26618}>();
// gdb-check:[...]static fn function_names::const_generic_fn_signed_int<-7>();
// gdb-check:[...]static fn function_names::const_generic_fn_unsigned_int<14>();
@ -76,7 +76,7 @@
// Const generic parameter
// cdb-command:x a!function_names::const_generic_fn*
// cdb-check:[...] a!function_names::const_generic_fn_bool<false> (void)
// cdb-check:[...] a!function_names::const_generic_fn_non_int<CONST$3fcd7c34c1555be6> (void)
// cdb-check:[...] a!function_names::const_generic_fn_non_int<CONST$6348c650c7b26618> (void)
// cdb-check:[...] a!function_names::const_generic_fn_unsigned_int<14> (void)
// cdb-check:[...] a!function_names::const_generic_fn_signed_int<-7> (void)