Poor -fspec-constr-count=n warning messages
The attached file, compiled with
ghc -O2 -fspec-constr-count=5 -ddpr-debug -c q.hs
gives a number of messages like
SpecConstr
Function `$j_X1BO{v} [lid]'
has one call pattern, but the limit is 0
Use -fspec-constr-count=n to set the bound
Use -dppr-debug to see specialisations
SpecConstr
Function `$j_X1BR{v} [lid]'
has two call patterns, but the limit is 1
Use -fspec-constr-count=n to set the bound
Use -dppr-debug to see specialisations
Note that the limit doesn't match the spec-constr-count
we set.
The "limit" given is sc_count
, but decreaseSpecCount
changes sc_count
from its default of specConstrCount dflags
. However, if this was fixed then we would get even stranger messages like
has two call patterns, but the limit is 5