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| author | Matthew Pickering <matthewtpickering@gmail.com> | 2021-05-17 10:34:09 +0100 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2021-05-19 23:41:57 -0400 |
| commit | c4099b0908e3f4ae04312ca82af147eb1585cd09 (patch) | |
| tree | 6af196559899d1b13c41db6061168c6d5cccf949 | |
| parent | 6a577cf0edb38577e703c9523a4307ae9fa7576d (diff) | |
| download | haskell-c4099b0908e3f4ae04312ca82af147eb1585cd09.tar.gz | |
Make setBndrsDemandInfo work with only type variables
Fixes #19849
Co-authored-by: Krzysztof Gogolewski <krzysztof.gogolewski@tweag.io>
| -rw-r--r-- | compiler/GHC/Core/Opt/DmdAnal.hs | 8 | ||||
| -rw-r--r-- | testsuite/tests/stranal/should_compile/T19849.hs | 7 | ||||
| -rw-r--r-- | testsuite/tests/stranal/should_compile/all.T | 1 |
3 files changed, 12 insertions, 4 deletions
diff --git a/compiler/GHC/Core/Opt/DmdAnal.hs b/compiler/GHC/Core/Opt/DmdAnal.hs index 1828f65276..373bdcb033 100644 --- a/compiler/GHC/Core/Opt/DmdAnal.hs +++ b/compiler/GHC/Core/Opt/DmdAnal.hs @@ -1262,10 +1262,10 @@ conservative thing and refrain from strictifying a dfun's argument dictionaries. -} -setBndrsDemandInfo :: [Var] -> [Demand] -> [Var] -setBndrsDemandInfo (b:bs) (d:ds) - | isTyVar b = b : setBndrsDemandInfo bs (d:ds) - | otherwise = +setBndrsDemandInfo :: HasCallStack => [Var] -> [Demand] -> [Var] +setBndrsDemandInfo (b:bs) ds + | isTyVar b = b : setBndrsDemandInfo bs ds +setBndrsDemandInfo (b:bs) (d:ds) = let !new_info = setIdDemandInfo b d !vars = setBndrsDemandInfo bs ds in new_info : vars diff --git a/testsuite/tests/stranal/should_compile/T19849.hs b/testsuite/tests/stranal/should_compile/T19849.hs new file mode 100644 index 0000000000..9fa50ef001 --- /dev/null +++ b/testsuite/tests/stranal/should_compile/T19849.hs @@ -0,0 +1,7 @@ +module T19849 where + +data T where + C :: forall k. T + +f :: T -> () +f C = () diff --git a/testsuite/tests/stranal/should_compile/all.T b/testsuite/tests/stranal/should_compile/all.T index 3e77a602ae..61e9c58dee 100644 --- a/testsuite/tests/stranal/should_compile/all.T +++ b/testsuite/tests/stranal/should_compile/all.T @@ -66,3 +66,4 @@ test('T18894b', [ grep_errmsg(r'Arity=2') ], compile, ['-ddump-stranal -dsuppre test('T18982', [ grep_errmsg(r'\$w. .*Int#$') ], compile, ['-dppr-cols=1000 -ddump-simpl -dsuppress-idinfo -dsuppress-uniques']) test('T19180', normal, compile, ['']) +test('T19849', normal, compile, ['']) |