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X register 0 used to be mapped to a hardware register, and therefore
faster than the other registers. Because of that, the compiler
tried to use x(0) as much as possible as a temporary register.
That was changed a few releases ago. X register 0 is now placed
in the array of all X registers and has no special speed
advantage compared to the other registers.
Remove the code in the compiler that attempts to use x(0) as
much as possible. As a result, the following type of instruction
will be much less frequent:
{put_list,Src,{x,0},{x,0}}
Instead, the following type of instruction will be more frequent:
{put_list,Src,{x,X},{x,X}}
(Where X is an arbitrary X register.)
Update the runtime system to specialize that kind of put_list
instruction.
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* bjorn/compiler/coverage:
v3_codegen: Remove check of operand for bs_context_to_binary
beam_jump: Eliminate a repeated clause
beam_asm: No longer allow iolists as contents in chunk/2
beam_utils_SUITE: Cover more lines in beam_utils
guard_SUITE: Add a test case to cover beam_dead:turn_op/1
Recognize 'nil' as a literal in beam_utils:bif_to_test/3
Cover more code in beam_bsm:btb_opt_1/3
Add test to cover a line in v3_kernel:opt_single_valued/3
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* maint:
Avoid falling measurements testcases on slow machines
stdlib: string optimize special case for ASCII
stdlib: Minor unicode_util opts
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* dgud/stdlib/optimize-string-lists:
Avoid falling measurements testcases on slow machines
stdlib: string optimize special case for ASCII
stdlib: Minor unicode_util opts
OTP-14670
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Minor grammar tweak in ETS documentation
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=== OTP-19.2.3.1 ===
Changed Applications:
- erts-8.2.2.1
Unchanged Applications:
- asn1-4.0.4
- common_test-1.13
- compiler-7.0.3
- cosEvent-2.2.1
- cosEventDomain-1.2.1
- cosFileTransfer-1.2.1
- cosNotification-1.2.2
- cosProperty-1.2.1
- cosTime-1.2.2
- cosTransactions-1.3.2
- crypto-3.7.2
- debugger-4.2.1
- dialyzer-3.0.3
- diameter-1.12.1
- edoc-0.8.1
- eldap-1.2.2
- erl_docgen-0.6.1
- erl_interface-3.9.2
- et-1.6
- eunit-2.3.2
- gs-1.6.2
- hipe-3.15.3
- ic-4.4.2
- inets-6.3.5
- jinterface-1.7.1
- kernel-5.1.1
- megaco-3.18.1
- mnesia-4.14.3
- observer-2.3
- odbc-2.12
- orber-3.8.2
- os_mon-2.4.1
- otp_mibs-1.1.1
- parsetools-2.1.4
- percept-0.9
- public_key-1.3
- reltool-0.7.2
- runtime_tools-1.11
- sasl-3.0.2
- snmp-5.2.4
- ssh-4.4
- ssl-8.1
- stdlib-3.2
- syntax_tools-2.1.1
- tools-2.9
- typer-0.9.11
- wx-1.8
- xmerl-1.3.12
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* sverker/mbcs-pool-stats/ERL-88/OTP-14795:
Fix erlang:memory
Remove duplicate stats for 'fetch'
Do not include new stats for 'allocator_sizes'
Add more cpool stats
erts: Add statistics for cpoll fetch attempts
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Avoid unicode_util module call for ASCII strings
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Exit early for Latin-1
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* ingela/ssl/ERL-521/OTP-14794:
ssl: Make sure all possible data is delivered
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Conflicts:
lib/ssl/src/ssl_connection.erl
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* ingela/ssl/cleaner-code:
ssl: Add gracefullness to dtls code
ssl: Remove old softupgrade code
ssl: Use genstamtem properly
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The bs_context_to_binary instruction only allows a register operand.
v3_codegen has a test to ensure that the operand is a register.
That test is no longer necessary. There used to be a possibility
that optimizations in sys_core_fold and the inliner could change
the operand for bs_context_to_binary to a binary literal. Since
09112806c15a81b that can no longer happen, because no more
optimizations are run after the introduction of the
bs_context_to_binary instruction.
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* maint:
dialyzer: Extend the map implementation's handling of ?unit
dialyzer: Use string:find() instead of string:str()
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* hasse/dialyzer/maps_anon_fun/OTP-14743:
dialyzer: Extend the map implementation's handling of ?unit
dialyzer: Use string:find() instead of string:str()
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* maint:
public_key: Fix failing pkix_verify_hostname_subjAltName_IP TC
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* hans/ssh/public_key/fix_bad_cert_merge:
public_key: Fix failing pkix_verify_hostname_subjAltName_IP TC
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* maint:
Update HOWTO with wxWidgets build examples
https should be mapped to url and not seealso
Update kernel appup for OTP-20.2
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* dgud/erl_docgen/https2url:
Update HOWTO with wxWidgets build examples
https should be mapped to url and not seealso
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* siri/appups-20.2:
Update kernel appup for OTP-20.2
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Was due to an unresolved merge conflict in a453532fe31eecd8c39b5035702ee20b402fd687
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Fix purging of modules with "fake literals"
OTP-14791
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This clause seems to have been introduced in cac51274eb9a.
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The clause that converted an iolist to a binary was never
executed.
Note that chunk/2 is called for all chunks in the
{extra_chunks,Chunks} option. This change will enforce that the
contents of each chunk must be a binary (as documented).
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f9a323d10a9f5d added consistent operand order for equality
comparisons. As a result, beam_dead:turn_op/1 is no longer covered.
We must keep the uncovered lines in beam_dead to ensure that
beam_dead can handle BEAM assembly code from another source than
v3_codegen that might not follow the operand order convention.
The only way to cover the lines is to use BEAM assembly in
the test case.
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beam_utils:bif_to_test/3 is supposed to never put a literal
operand as the first operand in is_eq_exact or is_ne_exact,
but 'nil' was not recognized as a literal.
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The uncovered line was added in 6753bbcc3fdb0.
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Place move S x0 instructions at the end of blocks
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When compiling Erlang source code, the literal area for the
module can only contain data types that have a literal
syntax.
However, it is possible to sneak in other data types
(such as references) in the literal pool by compiling from
abstract or assembly code. Those "fake literals" would work
fine, but would crash the runtime system when the module containing
the literals was purged.
Although fake literals are not officially supported, the
runtime should not crash when attempting to use them.
Therefore, fix the garbage collection of literals and releasing
of literal areas.
https://bugs.erlang.org/browse/ERL-508
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* hans/public_key/base64_fix/OTP-14788:
public_key: Fix bad calls to base64:*
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Also make tls code a little more direct for easier uderstanding
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This code is only relevant in version is was written in.
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