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Bug 1207210 - Fix MTypeBarrier::alwaysBails to handle ObjectOrNull inputs correctly. r=h4writer

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This commit is contained in:
Jan de Mooij 2015-09-22 20:11:31 +02:00
parent 9fe6d747e1
commit 3def9c33a7
1 changed files with 6 additions and 0 deletions
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6
js/src/jit/MIR.h
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@ -12427,6 +12427,12 @@ class MTypeBarrier
return false;
if (input()->type() == MIRType_Value)
return false;
if (input()->type() == MIRType_ObjectOrNull) {
// The ObjectOrNull optimization is only performed when the
// barrier's type is MIRType_Null.
MOZ_ASSERT(type == MIRType_Null);
return false;
}
return input()->type() != type;
}