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With multiple semantic transforms mentioning Enumerators, it may be possible for there not to be a substitution from the concrete rtl to some of the transforms. This is not an error - just a case where a given semantic transform doesnt apply. (e.g. icmp being described by different transforms with concrete intcc condition codes)

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This commit is contained in:
Dimo
2017-07-26 15:28:52 -07:00
committed by Jakob Stoklund Olesen
parent a2b60108fd
commit a92021ebce
1 changed files with 6 additions and 1 deletions
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7
lib/cretonne/meta/semantics/elaborate.py
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@@ -83,7 +83,12 @@ def find_matching_xform(d):
for x in d.expr.inst.semantics: for x in d.expr.inst.semantics:
subst = d.substitution(x.src.rtl[0], {}) subst = d.substitution(x.src.rtl[0], {})
assert subst is not None
# There may not be a substitution if there are concrete Enumerator
# values in the src pattern. (e.g. specifying the semantics of icmp.eq,
# icmp.ge... as separate transforms)
if (subst is None):
continue
if x.ti.permits({subst[v]: tv for (v, tv) in typing.items()}): if x.ti.permits({subst[v]: tv for (v, tv) in typing.items()}):
res.append(x) res.append(x)