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disjoint checker is somewhat smarter

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Araq
2015-03-15 00:54:09 +01:00
parent 1838ea2db4
commit ea5217c9fc
3 changed files with 113 additions and 2 deletions
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19
compiler/guards.nim
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@@ -373,13 +373,28 @@ proc addFactNeg*(m: var TModel, n: PNode) =
let n = n.neg
if n != nil: addFact(m, n)
proc canonOpr(opr: PSym): PSym =
case opr.magic
of someEq: result = opEq
of someLe: result = opLe
of someLt: result = opLt
of someLen: result = opLen
of someAdd: result = opAdd
of someSub: result = opSub
of someMul: result = opMul
of someDiv: result = opDiv
else: result = opr
proc sameTree*(a, b: PNode): bool =
result = false
if a == b:
result = true
elif (a != nil) and (b != nil) and (a.kind == b.kind):
elif a != nil and b != nil and a.kind == b.kind:
case a.kind
of nkSym: result = a.sym == b.sym
of nkSym:
result = a.sym == b.sym
if not result and a.sym.magic != mNone:
result = a.sym.magic == b.sym.magic or canonOpr(a.sym) == canonOpr(b.sym)
of nkIdent: result = a.ident.id == b.ident.id
of nkCharLit..nkInt64Lit: result = a.intVal == b.intVal
of nkFloatLit..nkFloat64Lit: result = a.floatVal == b.floatVal