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| author | Björn Gustavsson <[email protected]> | 2019-05-25 10:23:20 +0200 |
|---|---|---|
| committer | John Högberg <[email protected]> | 2019-05-28 10:35:37 +0200 |
| commit | a034ff64abab5f5cbf5c6aa38762044c968fe377 (patch) | |
| tree | 6055ccc07bc571870ff25af7d064347451c8efde /lib/erl_interface | |
| parent | d32991afaf3fc5f9f73e3e2448672bb9a1b80101 (diff) | |
| download | otp-a034ff64abab5f5cbf5c6aa38762044c968fe377.tar.gz otp-a034ff64abab5f5cbf5c6aa38762044c968fe377.tar.bz2 otp-a034ff64abab5f5cbf5c6aa38762044c968fe377.zip | |
Fix unsafe optimizations where guard tests could be removed
A repeated test could be optimized away. Example:
bar(A) ->
if is_bitstring(A) ->
if is_binary(A) ->
binary;
true ->
bitstring
end;
true ->
other
end.
In the example, the `is_binary/1` test would be optimized away,
basically turning the example into:
bar(A) ->
if is_bitstring(A) ->
bitstring;
true ->
other
end.
Thanks user Marcus Kruse in the Elixir forum for noticing this bug.
Diffstat (limited to 'lib/erl_interface')
0 files changed, 0 insertions, 0 deletions