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fold fp div by 0 to inf, the way gcc does. This is legal according to the FP spec
llvm-svn: 21655
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@ -470,6 +470,13 @@ struct DirectFPRules
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(BuiltinType)V2->getValue());
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return ConstantClass::get(*Ty, Result);
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}
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static Constant *Div(const ConstantClass *V1, const ConstantClass *V2) {
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if (V2->isExactlyValue(0.0)) return ConstantClass::get(*Ty, INFINITY);
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if (V2->isExactlyValue(-0.0)) return ConstantClass::get(*Ty, -INFINITY);
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if (V2->isNullValue()) return 0;
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BuiltinType R = (BuiltinType)V1->getValue() / (BuiltinType)V2->getValue();
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return ConstantClass::get(*Ty, R);
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}
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};
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