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8131782: C1 Class.cast optimization breaks when Class is loaded from static final

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Change as_ValueType() to return InstanceConstant when appropriate

Reviewed-by: jrose
This commit is contained in:
Aleksey Shipilev 2015-07-24 21:29:11 -04:00
parent 71716bea0b
commit 88a6ccaaa2
1 changed files with 13 additions and 1 deletions
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14
hotspot/src/share/vm/c1/c1_ValueType.cpp
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@ -153,7 +153,19 @@ ValueType* as_ValueType(ciConstant value) {
case T_FLOAT : return new FloatConstant (value.as_float ());
case T_DOUBLE : return new DoubleConstant(value.as_double());
case T_ARRAY : // fall through (ciConstant doesn't have an array accessor)
case T_OBJECT : return new ObjectConstant(value.as_object());
case T_OBJECT : {
// TODO: Common the code with GraphBuilder::load_constant?
ciObject* obj = value.as_object();
if (obj->is_null_object())
return objectNull;
if (obj->is_loaded()) {
if (obj->is_array())
return new ArrayConstant(obj->as_array());
else if (obj->is_instance())
return new InstanceConstant(obj->as_instance());
}
return new ObjectConstant(obj);
}
}
ShouldNotReachHere();
return illegalType;