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2016-11-23Merge branch 'maint'Björn Gustavsson
* maint: Update primary bootstrap document {yield/nb_yield}() limitation Suppress warnings from v3_kernel when inlining is turned on
2016-11-23Update primary bootstrapBjörn Gustavsson
2016-11-23Merge branch 'bjorn/compiler/fix-unwanted-warning/ERL-301/OTP-14040' into maintBjörn Gustavsson
* bjorn/compiler/fix-unwanted-warning/ERL-301/OTP-14040: Suppress warnings from v3_kernel when inlining is turned on
2016-11-23Merge branch 'jimdigriz/kernel/rpc-doc/ERL-302/PR-1252' into maintBjörn Gustavsson
* jimdigriz/kernel/rpc-doc/ERL-302/PR-1252: document {yield/nb_yield}() limitation
2016-11-23Merge branch 'maint'Hans Bolinder
* maint: dialyzer: Substitute 'opacity' for 'opaqueness' dialyzer: Improve a warning message dialyzer: Improve a warning message dialyzer: Correct a warnings message
2016-11-23Merge branch 'hasse/dialyzer/improve_messages/OTP-11403' into maintHans Bolinder
* hasse/dialyzer/improve_messages/OTP-11403: dialyzer: Substitute 'opacity' for 'opaqueness' dialyzer: Improve a warning message dialyzer: Improve a warning message dialyzer: Correct a warnings message
2016-11-23Merge branch 'maint'Hans Bolinder
* maint: stdlib: Correct types of the abstract format
2016-11-23Merge branch 'hasse/stdlib/correct_types' into maintHans Bolinder
* hasse/stdlib/correct_types: stdlib: Correct types of the abstract format
2016-11-22stdlib: Correct types of the abstract formatHans Bolinder
The types in erl_parse.yrl are more in harmony with the description in The Abstract Format (in ERTS User's Guide).
2016-11-22Merge branch 'maint'Hans Nilsson
2016-11-22Merge branch 'hans/inets/docs-cuddling' into maintHans Nilsson
2016-11-22scheme_validation_fun misspellt in docEvgeny M
2016-11-22Merge branch 'maint'Sverker Eriksson
2016-11-22Merge branch 'sverker/erts/crash-dump-limit/OTP-14046' into maintSverker Eriksson
* sverker/erts/crash-dump-limit: erts: Add env variable ERL_CRASH_DUMP_BYTES erts: Add ErtsStrToSint64 erts: Refactor crash dumping with cbprintf erts: Add cbprintf for Callback Printing erts: Remove unused erl_crash_dump()
2016-11-22erts: Add env variable ERL_CRASH_DUMP_BYTESSverker Eriksson
to limit crash dump size
2016-11-22Merge branch 'sverker/Wundef'Sverker Eriksson
2016-11-22Merge branch 'margnus1/hipe/refactor-rtl/PR-1243'Sverker Eriksson
* margnus1/hipe/refactor-rtl/PR-1243: hipe_x86: Fix encoding of test instr w/ neg imm hipe_tagscheme: Simplify test_two_fixnums with imm hipe_icode: Always const-propagate if&call args hipe_tagscheme: x86 lea+test for mask_and_compare hipe_tagscheme: Improve fixnum_addsub with imm hipe: Make realloc_binary fast case true branch hipe_x86_postpass: Negate conditions in goto elim hipe_tagscheme: Improve fixnum add on x86 hipe_rtl_to_x86: Use LEA only for immediate adds hipe_x86: LeaToAdd peephole rule hipe_sparc: move coalescing hipe_ppc: better rlwinm pp hipe_ppc: move coalescing hipe_rtl: drop alub dest when unused hipe_rtl: unify branch and alub hipe_x86: Fix&activate ElimCmp0 peephole rule hipe_{x86,amd64}: Finish test instr implementation
2016-11-22dialyzer: Substitute 'opacity' for 'opaqueness'Hans Bolinder
Suggested by Kostis.
2016-11-22dialyzer: Improve a warning messageHans Bolinder
Messages regarding guards with orelse/andalso could look like "Clause guard cannot succeed. The variable A was matched against the type any()". Now they look like as if or/and is used: "Guard test is_integer(A::atom()) can never succeed".
2016-11-22dialyzer: Improve a warning messageHans Bolinder
Messages like "Invalid type specification for function para3:exp_adt/0. The success typing is () -> 3" now look like "The specification for para3:exp_adt/0 has an opaque subtype para3_adt:exp1(para3_adt:exp2()) which is violated by the success typing () -> 3". The old message did not give any clue as to what invalidated the contract, namely the opaque subtype.
2016-11-22dialyzer: Correct a warnings messageHans Bolinder
Messages like "The attempt to match a term of type rec_api:f() against the variable _ breaks the opaqueness of rec_adt:f()" now look like "The attempt to match a term of type rec_adt:f() against the record field 'f' with type rec_api:f() breaks the opaqueness of the term".
2016-11-19document {yield/nb_yield}() limitationAlexander Clouter
2016-11-18Merge branch 'mm/stdlib/ord-docs/PR-1242'Björn Gustavsson
* mm/stdlib/ord-docs/PR-1242: Document the ordering used in ordsets and orddicts
2016-11-18Document the ordering used in ordsets and orddictsMichal Muskala
Right now the exact order of elements is not specified, yet many programs rely on the ordering being the obvious one - erlang term order. It is only beneficial to make this an explicit part of the documentation.
2016-11-18Merge branch 'maint'Björn Gustavsson
* maint: Travis: Reduce memory consumption for dialyzer
2016-11-18Merge branch 'bjorn/travis-dialyzer' into maintBjörn Gustavsson
* bjorn/travis-dialyzer: Travis: Reduce memory consumption for dialyzer
2016-11-18Travis: Reduce memory consumption for dialyzerBjörn Gustavsson
9e06884c3a7db started to run Dialyzer in Travis. After that, Travis has crashed several times because of the memory limit of 2Gb has been exceeded. Try to fix that by analyzing only three or four applications at a time.
2016-11-18Merge branch 'bjorn/compiler/guards/PR-1232/OTP-14042'Björn Gustavsson
* bjorn/compiler/guards/PR-1232/OTP-14042: compile_SUITE: Make sure that guards are optimized beam_dead: Remove redundant 'or' instruction beam_dead: Remove redundant 'bif' instructions Add test using LFE-generated Core Erlang modules Remove beam_bool v3_kernel: Generate optimized code for guards sys_core_fold: Remove unnecessary calls to opt_bool_case/1 record_SUITE: Strengthen test of record access in guards
2016-11-18compile_SUITE: Make sure that guards are optimizedBjörn Gustavsson
Guards should use the more efficient 'test' instructions, not 'bif' instructions. Add a test to make sure that the optimizations don't degrade. We do have to keep an exception list for functions where we can't replace all 'bif' calls with 'test' instructions. We try to keep that list a short as practically possible.
2016-11-18beam_dead: Remove redundant 'or' instructionBjörn Gustavsson
In practice, this optimization will only apply to contrived guards that are almost never used in real applications. The only reason we add this optimization is to help approach the goal of zero tolerance for 'bif' instructions instead of 'test' instructions in guards.
2016-11-18beam_dead: Remove redundant 'bif' instructionsBjörn Gustavsson
A 'bif' or 'gc_bif' instruction is redundant if it has the same failure label as a 'jump' instruction immediately following it. There is no need to test for liveness of the destination register, because the code at the failure label cannot safely assume that the destination register is initialized. See the comments in the code for further details. In practice, this optimization will only apply to contrived guards that are almost never used in real applications. The only reason we add this optimization is to help approach the goal of zero tolerance for 'bif' instructions instead of 'test' instructions in guards.
2016-11-18Add test using LFE-generated Core Erlang modulesBjörn Gustavsson
Ensure that correct (not necessarily optimal) code is generated for Core Erlang code not originating from v3_core.
2016-11-18Remove beam_boolBjörn Gustavsson
The guard optimizations in v3_kernel has removed the need for beam_bool.
2016-11-18v3_kernel: Generate optimized code for guardsBjörn Gustavsson
The compiler produces poor code for complex guard expressions with andalso/orelse. Here is an example from the filename module: -define(IS_DRIVELETTER(Letter),(((Letter >= $A) andalso (Letter =< $Z)) orelse ((Letter >= $a) andalso (Letter =< $z)))). skip_prefix(Name, false) -> Name; skip_prefix([L, DrvSep|Name], DrvSep) when ?IS_DRIVELETTER(L) -> Name; skip_prefix(Name, _) -> Name. beam_bool fails to simplify the code for the guard, leaving several 'bif' instructions: {function, skip_prefix, 2, 49}. {label,48}. {line,[{location,"filename.erl",187}]}. {func_info,{atom,filename},{atom,skip_prefix},2}. {label,49}. {test,is_ne_exact,{f,52},[{x,1},{atom,false}]}. {test,is_nonempty_list,{f,52},[{x,0}]}. {get_list,{x,0},{x,2},{x,3}}. {test,is_nonempty_list,{f,52},[{x,3}]}. {get_list,{x,3},{x,4},{x,5}}. {bif,'=:=',{f,52},[{x,1},{x,4}],{x,6}}. {test,is_ge,{f,50},[{x,2},{integer,65}]}. {bif,'=<',{f,52},[{x,2},{integer,90}],{x,7}}. {test,is_eq_exact,{f,51},[{x,7},{atom,false}]}. {test,is_ge,{f,50},[{x,2},{integer,97}]}. {bif,'=<',{f,52},[{x,2},{integer,122}],{x,7}}. {jump,{f,51}}. {label,50}. {move,{atom,false},{x,7}}. {label,51}. {bif,'=:=',{f,52},[{x,7},{atom,true}],{x,7}}. {test,is_eq_exact,{f,52},[{x,6},{atom,true}]}. {test,is_eq_exact,{f,52},[{x,7},{atom,true}]}. {move,{x,5},{x,0}}. return. {label,52}. return. We can add optimizations of guard tests to v3_kernel to achive a better result: {function, skip_prefix, 2, 49}. {label,48}. {line,[{location,"filename.erl",187}]}. {func_info,{atom,filename},{atom,skip_prefix},2}. {label,49}. {test,is_ne_exact,{f,51},[{x,1},{atom,false}]}. {test,is_nonempty_list,{f,51},[{x,0}]}. {get_list,{x,0},{x,2},{x,3}}. {test,is_nonempty_list,{f,51},[{x,3}]}. {get_list,{x,3},{x,4},{x,5}}. {test,is_eq_exact,{f,51},[{x,1},{x,4}]}. {test,is_ge,{f,51},[{x,2},{integer,65}]}. {test,is_lt,{f,50},[{integer,90},{x,2}]}. {test,is_ge,{f,51},[{x,2},{integer,97}]}. {test,is_ge,{f,51},[{integer,122},{x,2}]}. {label,50}. {move,{x,5},{x,0}}. return. {label,51}. return. Looking at the STDLIB application, there were 112 lines of BIF calls in guards that beam_bool failed to convert to test instructions. This commit eliminates all those BIF calls. Here is how I counted the instructions: $ PATH=$ERL_TOP/bin:$PATH erlc -I ../include -I ../../kernel/include -S *.erl $ grep "bif,'[=<>]" *.S | grep -v f,0 dets.S: {bif,'=:=',{f,547},[{x,4},{atom,read_write}],{x,4}}. dets.S: {bif,'=:=',{f,547},[{x,5},{atom,saved}],{x,5}}. dets.S: {bif,'=:=',{f,589},[{x,5},{atom,read}],{x,5}}. . . . $ grep "bif,'[=<>]" *.S | grep -v f,0 | wc 112 224 6765 $
2016-11-18Merge branch 'maint'Björn Gustavsson
* maint: Run dialyzer as part of the travis script Correct tar_SUITE:unicode/1
2016-11-18Merge branch 'kostis/travis-dialyzer' into maintBjörn Gustavsson
* kostis/travis-dialyzer: Run dialyzer as part of the travis script
2016-11-18Merge branch 'bjorn/cuddle-with-tests' into maintBjörn Gustavsson
* bjorn/cuddle-with-tests: Correct tar_SUITE:unicode/1
2016-11-18Merge branch 'maint'Ingela Anderton Andin
2016-11-18Merge branch 'ingela/httpc/keep-alive-https/OTP-14041' into maintIngela Anderton Andin
* ingela/httpc/keep-alive-https/OTP-14041: inets: httpc - do not send absolute URIs over TLS tunnels
2016-11-18Suppress warnings from v3_kernel when inlining is turned onBjörn Gustavsson
v3_kernel may produce unwanted and confusing warnings for code that has been inlined with the new inliner (cerl_inline). Consider this code: -compile(inline). compute1(X) -> add(X, 0). compute2(X, Y) -> add(X, Y). add(1, 0) -> 1; add(1, Y) -> %% "this clause cannot match..." 1 + Y; add(X, Y) -> X + Y. v3_kernel warns because add/2 has been inlined into compute1/1 and only the first clause in add/2 will match. But the other clauses are needed when add/2 is inlined into compute2/2, so the user cannot do anything to eliminate the warning (short of manually inlining add/2, defeating the purpose of the 'inline' option). The warning would be reasonable if compute2/2 didn't exist, but it would be too complicated for the compiler to figure whether a warning make sense or not. Therefore, suppress all warnings generated by v3_kernel if cerl_inline has been run. ERL-301
2016-11-18Merge branch 'dgud/stdlib/rand-fixup-spec'Dan Gudmundsson
* dgud/stdlib/rand-fixup-spec: Fixup of specs in rand
2016-11-18Merge branch 'maint'Ingela Anderton Andin
2016-11-18Merge branch 'ingela/odbc/mac' into maintIngela Anderton Andin
* ingela/odbc/mac: odbc: Remove support for old MACs
2016-11-18odbc: Remove support for old MACsIngela Anderton Andin
Change configure to skip odbc for old MACs, the change in PR-1227 is not backwards compatible with old MACs, and we do not see a need to continue support for such old versions. However it is still possible to make it work on such machines using the --with-odbc configure option.
2016-11-17Run dialyzer as part of the travis scriptKostis Sagonas
Build a dialyzer PLT and use it to analyze all OTP applications that can currently be analyzed without warnings even when the option -Wunmatched_returns is turned on. Note that the dialyzer run does _not_ enable the option which allows for improper lists. Applications to run dialyzer on are mentioned alphabetically. As more applications are fixed to run cleanly even with unmatched returns, they can be added to this list. However, there will come a point when the warning pass of Dialyzer will run out of memory on Travis and the process will be killed. This should be fixed in dialyzer.
2016-11-17erts: Tweak PSTACK to avoid warningSverker Eriksson
warning: array subscript is below array bounds and ok, it's technically undef behavior to set pointer before first array element.
2016-11-17erts: Fix all -Wundef errorsSverker Eriksson
2016-11-17erts: Add ErtsStrToSint64Sverker Eriksson
for simplify string to 64-bit integer parsing.
2016-11-17erts: Refactor crash dumping with cbprintfSverker Eriksson
Instead of passing around a file descriptor use a function pointer to facilitate more advanced backend write logic such as size limitation or compression.
2016-11-17erts: Add cbprintf for Callback PrintingSverker Eriksson
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