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Bug 995542: Add extra consumers of the congruence-head when we split it from the class. (r=sstangl)

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This commit is contained in:
Marty Rosenberg 2014-04-22 15:11:36 -04:00
parent a3b8bcbd4b
commit a6efed9fd1
1 changed files with 4 additions and 1 deletions
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5
js/src/jit/ValueNumbering.cpp
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@ -506,6 +506,7 @@ ValueNumberer::breakClass(MDefinition *def)
MDefinition *newRep = findSplit(def);
if (!newRep)
return;
markConsumers(def);
ValueNumberData *newdata = newRep->valueNumberData();
// Right now, |defdata| is at the front of the list, and |newdata| is
@ -544,8 +545,10 @@ ValueNumberer::breakClass(MDefinition *def)
// make the VN of every member in the class the VN of the new representative number.
for (MDefinition *tmp = newRep; tmp != nullptr; tmp = tmp->valueNumberData()->classNext) {
// if this instruction is already scheduled to be processed, don't do anything.
if (tmp->isInWorklist())
if (tmp->isInWorklist()) {
IonSpew(IonSpew_GVN, "Defer to a new congruence class: %d", tmp->id());
continue;
}
IonSpew(IonSpew_GVN, "Moving to a new congruence class: %d", tmp->id());
tmp->setValueNumber(newRep->id());
markConsumers(tmp);