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Auto merge of #77687 - est31:hash_shorter_path, r=davidtwco 

Use shorter path for std:#️⃣:Hash
This commit is contained in:
bors 2020-10-09 08:09:32 +00:00
parent 9a74fb726e 7367cfef59
commit fc3d8e3fcc
1 changed files with 6 additions and 6 deletions
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12
compiler/rustc_span/src/lib.rs
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@ -1861,7 +1861,7 @@ where
}
if *self == DUMMY_SP {
std::hash::Hash::hash(&TAG_INVALID_SPAN, hasher);
Hash::hash(&TAG_INVALID_SPAN, hasher);
return;
}
@ -1872,28 +1872,28 @@ where
let (file_lo, line_lo, col_lo) = match ctx.byte_pos_to_line_and_col(span.lo) {
Some(pos) => pos,
None => {
std::hash::Hash::hash(&TAG_INVALID_SPAN, hasher);
Hash::hash(&TAG_INVALID_SPAN, hasher);
span.ctxt.hash_stable(ctx, hasher);
return;
}
};
if !file_lo.contains(span.hi) {
std::hash::Hash::hash(&TAG_INVALID_SPAN, hasher);
Hash::hash(&TAG_INVALID_SPAN, hasher);
span.ctxt.hash_stable(ctx, hasher);
return;
}
std::hash::Hash::hash(&TAG_VALID_SPAN, hasher);
Hash::hash(&TAG_VALID_SPAN, hasher);
// We truncate the stable ID hash and line and column numbers. The chances
// of causing a collision this way should be minimal.
std::hash::Hash::hash(&(file_lo.name_hash as u64), hasher);
Hash::hash(&(file_lo.name_hash as u64), hasher);
let col = (col_lo.0 as u64) & 0xFF;
let line = ((line_lo as u64) & 0xFF_FF_FF) << 8;
let len = ((span.hi - span.lo).0 as u64) << 32;
let line_col_len = col | line | len;
std::hash::Hash::hash(&line_col_len, hasher);
Hash::hash(&line_col_len, hasher);
span.ctxt.hash_stable(ctx, hasher);
}
}