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DFA: implement exception handling properly

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This commit is contained in:
Andreas Rumpf 2018-10-14 13:19:33 +02:00
commit b39302b0d2
3 changed files with 55 additions and 16 deletions
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3
compiler/destroyer.nim
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@ -216,6 +216,7 @@ proc isLastRead(n: PNode; c: var Con): bool =
let s = n.sym
var pcs: seq[int] = @[instr+1]
var takenGotos: IntSet
var takenForks = initIntSet()
while pcs.len > 0:
var pc = pcs.pop
@ -251,7 +252,7 @@ proc isLastRead(n: PNode; c: var Con): bool =
inc pc
of fork:
# we follow the next instruction but push the dest onto our "work" stack:
if not takenGotos.containsOrIncl(pc):
if not takenForks.containsOrIncl(pc):
pcs.add pc + c.g[pc].dest
inc pc
#echo c.graph.config $ n.info, " last read here!"