Re: Stg-lint and bootstrapping (fails?)

On 8/21/17, Gabor Greif wrote:

Hi Simon,

for me it happens on many files that are compiled with

$ make GhcStage2HcOpts="-O1 -g"

while the stage1 compiler is active.

Tomorrow I can add a concrete invocation.

Here is it: "inplace/bin/ghc-stage1" -hisuf hi -osuf o -hcsuf hc -static -O0 -H64m -Wall -fllvm-fill-undef-with-garbage -Werror -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist-ghcconstants/header -this-unit-id ghc-8.3 -hide-all-packages -i -icompiler/backpack -icompiler/basicTypes -icompiler/cmm -icompiler/codeGen -icompiler/coreSyn -icompiler/deSugar -icompiler/ghci -icompiler/hsSyn -icompiler/iface -icompiler/llvmGen -icompiler/main -icompiler/nativeGen -icompiler/parser -icompiler/prelude -icompiler/profiling -icompiler/rename -icompiler/simplCore -icompiler/simplStg -icompiler/specialise -icompiler/stgSyn -icompiler/stranal -icompiler/typecheck -icompiler/types -icompiler/utils -icompiler/vectorise -icompiler/stage2/build -Icompiler/stage2/build -icompiler/stage2/build/./autogen -Icompiler/stage2/build/./autogen -Icompiler/. -Icompiler/parser -Icompiler/utils -Icompiler/../rts/dist/build -Icompiler/stage2 -optP-DGHCI -optP-include -optPcompiler/stage2/build/./autogen/cabal_macros.h -package-id base-4.10.0.0 -package-id deepseq-1.4.3.0 -package-id directory-1.3.0.2 -package-id process-1.6.1.0 -package-id bytestring-0.10.8.2 -package-id binary-0.8.5.1 -package-id time-1.8.0.2 -package-id containers-0.5.10.2 -package-id array-0.5.2.0 -package-id filepath-1.4.1.2 -package-id template-haskell-2.12.0.0 -package-id hpc-0.6.0.3 -package-id transformers-0.5.2.0 -package-id ghc-boot-8.3 -package-id ghc-boot-th-8.3 -package-id ghci-8.3 -package-id unix-2.7.2.2 -package-id terminfo-0.4.1.0 -Wall -fno-warn-name-shadowing -this-unit-id ghc -XHaskell2010 -optc-DTHREADED_RTS -DGHCI_TABLES_NEXT_TO_CODE -DSTAGE=2 -Rghc-timing -O1 -no-user-package-db -rtsopts -Wnoncanonical-monad-instances -odir compiler/stage2/build -hidir compiler/stage2/build -stubdir compiler/stage2/build -dynamic-too -c compiler/typecheck/TcEvidence.hs -o compiler/stage2/build/TcEvidence.o -dyno compiler/stage2/build/TcEvidence.dyn_o WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_soeO] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_soeN] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_sosq] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_soxX] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_soy2] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_soy9] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_soyw] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_sowZ] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_sovR] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_sovx] WARNING: file compiler/simplCore/SimplCore.hs, line 700 Simplifier bailing out after 4 iterations [721, 479, 80, 4] Size = {terms: 8,035, types: 8,864, coercions: 1,129, joins: 0/96} WARNING: file compiler/simplCore/OccurAnal.hs, line 2163 Just 3 [] WARNING: file compiler/simplCore/OccurAnal.hs, line 2163 Just 3 [] WARNING: file compiler/simplCore/OccurAnal.hs, line 2163 Just 3 [] WARNING: file compiler/simplCore/SimplCore.hs, line 1024 Not shorting out: ebv_uniq And with `-g` I get even more: $ "inplace/bin/ghc-stage1" -hisuf hi -osuf o -hcsuf hc -static -O0 -H64m -Wall -fllvm-fill-undef-with-garbage -Werror -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist-ghcconstants/header -this-unit-id ghc-8.3 -hide-all-packages -i -icompiler/backpack -icompiler/basicTypes -icompiler/cmm -icompiler/codeGen -icompiler/coreSyn -icompiler/deSugar -icompiler/ghci -icompiler/hsSyn -icompiler/iface -icompiler/llvmGen -icompiler/main -icompiler/nativeGen -icompiler/parser -icompiler/prelude -icompiler/profiling -icompiler/rename -icompiler/simplCore -icompiler/simplStg -icompiler/specialise -icompiler/stgSyn -icompiler/stranal -icompiler/typecheck -icompiler/types -icompiler/utils -icompiler/vectorise -icompiler/stage2/build -Icompiler/stage2/build -icompiler/stage2/build/./autogen -Icompiler/stage2/build/./autogen -Icompiler/. -Icompiler/parser -Icompiler/utils -Icompiler/../rts/dist/build -Icompiler/stage2 -optP-DGHCI -optP-include -optPcompiler/stage2/build/./autogen/cabal_macros.h -package-id base-4.10.0.0 -package-id deepseq-1.4.3.0 -package-id directory-1.3.0.2 -package-id process-1.6.1.0 -package-id bytestring-0.10.8.2 -package-id binary-0.8.5.1 -package-id time-1.8.0.2 -package-id containers-0.5.10.2 -package-id array-0.5.2.0 -package-id filepath-1.4.1.2 -package-id template-haskell-2.12.0.0 -package-id hpc-0.6.0.3 -package-id transformers-0.5.2.0 -package-id ghc-boot-8.3 -package-id ghc-boot-th-8.3 -package-id ghci-8.3 -package-id unix-2.7.2.2 -package-id terminfo-0.4.1.0 -Wall -fno-warn-name-shadowing -this-unit-id ghc -XHaskell2010 -optc-DTHREADED_RTS -DGHCI_TABLES_NEXT_TO_CODE -DSTAGE=2 -Rghc-timing -O1 -g -no-user-package-db -rtsopts -Wnoncanonical-monad-instances -odir compiler/stage2/build -hidir compiler/stage2/build -stubdir compiler/stage2/build -dynamic-too -c compiler/typecheck/TcEvidence.hs -o compiler/stage2/build/TcEvidence.o -dyno compiler/stage2/build/TcEvidence.dyn_o WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_so9S] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_so9R] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_sonu] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_sot1] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_sot6] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_sotd] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_sotA] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_sos3] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_soqV] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [$j_soqB] WARNING: file compiler/simplCore/SimplCore.hs, line 700 Simplifier bailing out after 4 iterations [714, 479, 80, 4] Size = {terms: 8,035, types: 8,864, coercions: 1,129, joins: 0/96} WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 OccurAnal failed to rediscover join point(s): [go58_akL0] ... ETC. Cheers, Gabor

Cheers,

Gabor

Em seg, 21 de ago de 2017 às 17:49, Simon Peyton Jones < simonpj@microsoft.com> escreveu:

...

| Oh dear, then I've really misunderstood the intent of this warning. I've | been noticing these during the GHC build for quite some time now.

...

Really?

...

After stumbling on #14142, I removed -dno-debug-output from mk/flavours/ validate.mk and re-validated. Not a single occurrence of

...

| > | WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 | > | OccurAnal failed to rediscover join point(s): [go58_akKa]

...

How can I reproduce what you are seeing?

...

Simon

...

| -----Original Message----- | From: Ben Gamari [mailto:ben@smart-cactus.org] | Sent: 19 August 2017 16:54 | To: Simon Peyton Jones ; Gabor Greif | | Cc: ghc-devs | Subject: RE: Stg-lint and bootstrapping (fails?) | | Simon Peyton Jones writes: | | > | WARNING: file compiler/simplCore/OccurAnal.hs, line 2695 | > | OccurAnal failed to rediscover join point(s): [go58_akKa] | > | > That shouldn't happen! If you can make a repro case, please open a | ticket. | > | Oh dear, then I've really misunderstood the intent of this warning. I've | been noticing these during the GHC build for quite some time now. | | Cheers, | | - Ben