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cleanup_semantics() should remove repeated prim_from_bv(x)

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This commit is contained in:
Dimo
2017-07-26 19:10:14 -07:00
committed by Jakob Stoklund Olesen
parent 11014ec544
commit 1ddee38895
1 changed files with 13 additions and 4 deletions
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17
lib/cretonne/meta/semantics/elaborate.py
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@@ -57,21 +57,30 @@ def cleanup_semantics(r, outputs):
new_defs = [] # type: List[Def]
subst_m = {v: v for v in r.vars()} # type: VarMap
definition = {} # type: Dict[Var, Def]
prim_to_bv_map = {} # type: Dict[Var, Def]
# Pass 1: Remove redundant prim_to_bv
for d in r.rtl:
inst = d.expr.inst
if (inst == prim_to_bv):
if d.expr.args[0] in definition:
assert isinstance(d.expr.args[0], Var)
def_loc = definition[d.expr.args[0]]
arg = d.expr.args[0]
df = d.defs[0]
assert isinstance(arg, Var)
if arg in definition:
def_loc = definition[arg]
if def_loc.expr.inst == prim_from_bv:
assert isinstance(def_loc.expr.args[0], Var)
subst_m[d.defs[0]] = def_loc.expr.args[0]
subst_m[df] = def_loc.expr.args[0]
continue
if arg in prim_to_bv_map:
subst_m[df] = prim_to_bv_map[arg].defs[0]
continue
prim_to_bv_map[arg] = d
new_def = d.copy(subst_m)
for v in new_def.defs: