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Mnesia: note first, next, prev and last vs fragmented tables
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* bjorn/erts/pack-combined:
Pack combined instructions
beam_makeops: Refactor code generation
Correct disassembly of select instructions
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Add compile_info option to compile
OTP-14615
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* maint:
Document that the compiler may optimize away atoms
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Document that the compiler may optimize away atoms
OTP-14614
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* lukas/erts/remove-dirty-scheduler-defines/OTP-14613:
erts: Remove possibility to disable dirty schedulers
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* ingela/inets/doc-fix:
inets: Fix xmllint error
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* maint:
dialyzer: Improve check of unknown types
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* hasse/dialyzer/check_forms/OTP-14606:
dialyzer: Improve check of unknown types
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The implementation of OTP-14218 (commit 6d3b38a) has a weakness: only
a very limited part of the type form is checked. This is now fixed:
types not used by specs are checked equally well as types used by
specs.
The new function erl_types:t_from_form_check_remote() checks usage of
remote types. It does not expand used local types, and has (almost) no
limits on depth and size.
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* maint:
tools: Add handling of the -on_load() attribute to Xref
tools: Correction of xref(3)
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* hasse/tools/xref_on_load/OTP-14344:
tools: Add handling of the -on_load() attribute to Xref
tools: Correction of xref(3)
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In the Table Fragmentation documentation section, note that the
functions first/1, next/2, prev/2 and last/1 return elements in an
undefined order for fragmented tables.
Also remove superfluous "the".
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* maint:
Updated OTP version
Update release notes
Update version numbers
inets: httpd correct server_name environment value
inets: httpd - Add chunk handling of client data
inets: Restore old behavior when parsing "+"
inets: prepare for release
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* maint-20:
Updated OTP version
Update release notes
Update version numbers
inets: httpd correct server_name environment value
inets: httpd - Add chunk handling of client data
inets: Restore old behavior when parsing "+"
inets: prepare for release
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make stop_timeout in ct_slave:stop configurable
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This allows compilers built on top of the compile module
to attach external compilation metadata to the compile_info
chunk.
For example, Erlang uses this chunk to store the compiler
version. Elixir and LFE may augment this by also adding
their own compiler versions, which can be useful when
debugging.
The deterministic option does not affect the user supplied
compile_info. It is therefore the responsibility of external
compilers to guarantee any added information does not violate
the determinsitic option, if such option is supported.
Finally, this code moves the building of the compile_info
options to the compile module instead of beam_asm, moving
all of the option mangling code to a single place.
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The refactoring will simplify packing of combined instructions.
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Make sure to use the 'unpacked[-1]' when accessing the unpacked
arguments.
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* bjorn/erts/relative-jumps:
Pack failure labels in i_select_val2 and i_select_tuple_arity2
Optimize i_select_tuple_arity2 and is_select_lins
Rewrite select_val_bins so that its labels can be packed
Pack sequences of trailing 'f' operands
Implement packing of 'f' and 'j'
Make sure that mask literals are 64 bits
Use relative failure labels
Add information about offset to common group start position
Remove JUMP_OFFSET
Refactor instructions to support relative jumps
Introduce a new trace_jump/1 instruction for tracing
Avoid using $Src more than once
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Don't save a pointer to the default failure label. That could
relieve register pressure. Instead, if we'll need to signal an
error in i_select_tuple_arity2, delay to the execution phase.
That should be a clear win because i_select_tuple_arity2 very
rarely fails because of the term being selected is not a tuple.
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Pack sequences of trailing 'f' operands for instructions
such at jump_on_val or i_select_val_lins.
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Use the "ull" suffix for the mask literals instead of "ul"
to ensure that the literals are 64 bits also on Windows.
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Relative failure in itself is not an optimization, but we plan to
pack failure labels in the future to save memory.
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It has served its purpose.
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The following code could fail in the call to list_existing_atom/1:
String = atom_to_list(some_atom),
Atom = list_to_existing_atom(String)
because the compiler will rewrite the code to:
String = "some_atom",
Atom = list_to_existing_atom(String)
If some_atom is not used in another place, it will not exist.
The compiler could be updated to preserve the atom in this simple case,
but it would be hard to make sure that the compiler never loses atoms
that exist in the source text. It also difficult to imagine a
real world use case where this would be a problem. If an atom is
mentioned only in a way that the compiler can optimize away, is there
really any need to create the atom at all in list_to_existing_atom/1?
Therefore, it is better to place the responsibility that the atom exists
on the user of list_to_existing_atom/1. Update the documentation to
mention that the compiler may optimize away atoms.
https://bugs.erlang.org/browse/ERL-453
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* maint:
stdlib: Fix jumping to beginning or end of line
Fix del_chars not considering wide chars and update buffer length before calling write_buf
Make cp_pos_to_col function aware of the ANSI escape codes
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Consider ANSI escape codes on cp_pos_to_col
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* anders/diameter/grouped_decode/OTP-14607:
Fix diameter_packet.avps decode of Grouped AVP errors in Failed-AVP
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* anders/diameter/DOIC/OTP-14588:
Fix avp_dictionaries decode with {decode_format, none}
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When cursor is before or after a multi-codepoint grapheme cluster.
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