diff options
Diffstat (limited to 'compiler/GHC/Core/Opt/SpecConstr.hs')
| -rw-r--r-- | compiler/GHC/Core/Opt/SpecConstr.hs | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/compiler/GHC/Core/Opt/SpecConstr.hs b/compiler/GHC/Core/Opt/SpecConstr.hs index ab36ad8f22..9dd4ab895b 100644 --- a/compiler/GHC/Core/Opt/SpecConstr.hs +++ b/compiler/GHC/Core/Opt/SpecConstr.hs @@ -1744,8 +1744,8 @@ Note [spec_usg includes rhs_usg] In calls to 'specialise', the returned ScUsage must include the rhs_usg in the passed-in SpecInfo, unless there are no calls at all to the function. -The caller can, indeed must, assume this. He should not combine in rhs_usg -himself, or he'll get rhs_usg twice -- and that can lead to an exponential +The caller can, indeed must, assume this. They should not combine in rhs_usg +themselves, or they'll get rhs_usg twice -- and that can lead to an exponential blowup of duplicates in the CallEnv. This is what gave rise to the massive performance loss in #8852. |