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* egil/compiler/maps-fix-sys_core_fold:
compiler: Fix sys_core_fold let optimization
compiler: Add debug listing after sys_core_fold
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* egil/compiler/maps-fix-codegen:
compiler: Fix codegen multiple updates for Maps
erts,compiler: Correct and amend tests for Maps
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Map variable was not covered and faulty optimization could occur.
Ex.
t() ->
M0 = id(#{ "a" => 1 }),
#{ "a" := _ } = M0,
M0#{ "a" := b }.
M0 was lost in let expression optimization.
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This fixes an error on multiple updates optimization for map pairs.
The error was introduced with moving to term order in Maps.
This also fixes an error where register life time was lost for values
and could result in erroneuos values being emitted in for map pairs.
Simplified v3_codegen by moving multiple update optimizations to v3_kernel.
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Faulty test for maps update
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* hsv/using_lists_droplast:
lib/mnesia/test/ - Replace reverse(tl(reverse(L))) with lists:droplast/1
lib/ssh - Replace reverse(tl(reverse(L))) with lists:droplast/1
lib/wx - Replace reverse(tl(reverse(L))) with lists:droplast/1
Use lists:droplast/1 in orber/orber_interceptors.erl
Import and use lists:droplast/1 in v3_core/v3_kernel
OTP-11678
OTP-11677
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* egil/erts/fix-maps-beam_load:
compiler: Update map_SUITE with error case test
erts: Maps must fail on exact updates of empty Maps
erts: Fix Maps for beam_load
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M#{ key := V } should fail when M is not a Map
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* bjorn/compiler/applying-binary-crash/OTP-11672:
beam_bsm: Eliminate emulator crash when a binary is called
beam_validator: Validate the "fun" argument for a call_fun/1 instruction
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* bjorn/compiler/optimizations/OTP-11584:
sys_core_fold: Prevent case expressions from being evaluated twice
sys_core_fold_SUITE: For cleanliness, move id/1 to the end
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We must not do the delayed binary creation optimization if the
code attempts to call the matched out binary. Calling a matchstate
will crash the run-time system.
Reported-by: Loïc Hoguin
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The fun argument for a call_fun/1 instruction was not validated.
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* bjorn/eep37/OTP-11537:
Issue a warning when a named fun is constructed but not used
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In e12b7d5331c58b41db06cadfa4af75b78b62a2b1, a bug was introduced
that would cause case expressions to be evaluated more than once
if there were aliases in the pattern. Example:
X = Y = io:put_chars("some chars"),
{X,Y}
That would be rewritten to code similar to (but in Core Erlang):
X = io:put_chars("some chars"),
X = io:put_chars("some chars"),
{X,Y}
Make sure that we only evalute the expression once by doing a
transformation similar to (but in Core Erlang):
NewVar = io:put_chars("some chars"),
X = NewVar,
Y = NewVar,
{X,Y}
Reported-by: José Valim
Reported-by: Anthony Ramine
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Simplify compiler internals and parsing of core format.
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Simplify compiler internals for kernel passes.
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Make map update expressions safe, i.e. (foo())#{ k1 := 1 }
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The instruction get_map_element has a faillabel so you may not
use the instruction within a allocate/deallocate block.
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With the => and := operators for updating maps, this optimization is
no longer valid.
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The syntax is handled upto v3_kernel where it is reduced to
previous behaviour for construction and updates. Meaning,
the ':=' operator is handled exactly as '=>' operator.
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Update erlang lint and syntax expand for #{ K := V }
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To add a type-testing guard BIF, the following steps are needed:
* The BIF itself is added to bif.tab (note that it should be declared
using "ubif", not "bif"), and its implementation to erl_bif_op.c.
* erl_internal must be modified in 3 places: The type test must be
recognized as guard BIF, as a type test, and it must be auto-imported.
* There must be an instruction that implements the same type test as
the BIF (it will be used in guards). beam_utils:bif_to_test/3 must
be updated to recognize the new guard BIF.
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All pairs in a Map needs to be in strict ascending key order.
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If a literal key already is present in a Map update the latter should be used.
Warn for previous duplicates in the Map.
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Can now handle {list [reg()]} elements in instructions.
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To make it possible to build the entire OTP system, also define
dummys for the instructions in ops.tab.
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