Cool message -- forward it to Simon PJ to get more info.
cdsmith:
I'm running into this in some code I wrote. What does it mean? It says
to look at -fspec-constr-count, but that flag doesn't seem to be in the
GHC documentation.
It's fairly new -- you can get explosions in the number of
specialisations with Specconstr sometimes, and iirc this tunes that
value.
This isn't critical; the code still seems to work fine. It just makes
the build uglier.
Thanks. Message below.
SpecConstr: too many specialisations for one function (see -fspec-constr-
count):
Function: main:Expr.simplifyTerm{v rqC} [lid]
Specialisations: [([sc_s2wb{v} [lid], sc_s2wc{v} [lid],
sc_s2wd{v} [lid], sc_s2we{v} [lid], sc_s2wf{v}
[lid],
sc_s2wg{v} [lid]],
[main:Expr.Graph{v r51} [gid]
sc_s2wg{v} [lid]
sc_s2wf{v} [lid]
sc_s2we{v} [lid]
sc_s2wd{v} [lid],
base:GHC.Base.:{(w) v 65} [gid]
@ main:Expr.Gen{tc r53}
(main:Expr.Edge{v r4Q} [gid] sc_s2wc{v} [lid])
sc_s2wb{v} [lid]]),
([sc_s2wh{v} [lid], sc_s2wi{v} [lid], sc_s2wj{v}
[lid],
sc_s2wk{v} [lid], sc_s2wl{v} [lid], sc_s2wm{v}
[lid]],
[main:Expr.Graph{v r51} [gid]
sc_s2wm{v} [lid]
sc_s2wl{v} [lid]
sc_s2wk{v} [lid]
sc_s2wj{v} [lid],
base:GHC.Base.:{(w) v 65} [gid]
@ main:Expr.Gen{tc r53}
(main:Expr.Ghost{v r4P} [gid] sc_s2wi{v} [lid])
sc_s2wh{v} [lid]]),
([sc_s2wR{v} [lid], sc_s2wS{v} [lid], sc_s2wT{v}
[lid]],
[sc_s2wT{v} [lid],
base:GHC.Base.:{(w) v 65} [gid]
@ main:Expr.Gen{tc r53}
(main:Expr.Vertex{v r4R} [gid] sc_s2wS{v} [lid])
sc_s2wR{v} [lid]]),
([sc_s2wU{v} [lid], sc_s2wV{v} [lid], sc_s2wW{v}
[lid]],
[sc_s2wW{v} [lid],
base:GHC.Base.:{(w) v 65} [gid]
@ main:Expr.Gen{tc r53}
(main:Expr.Vertex{v r4R} [gid]
(base:GHC.Base.I#{(w) v 6d} [gid] sc_s2wV{v}
[lid]))
sc_s2wU{v} [lid]])]
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