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| author | Chris Lattner <sabre@nondot.org> | 2003-05-12 15:26:25 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2003-05-12 15:26:25 +0000 |
| commit | 893af8c058aad683027c604d6cbe818c59e0eda8 (patch) | |
| tree | a8a508320f6502373619c1a4a2a2b4a11bdbe68e /lib/VMCore | |
| parent | 2cfd1aef10b2ed2c39796564459bf585e676e45e (diff) | |
| download | llvm-893af8c058aad683027c604d6cbe818c59e0eda8.tar.gz llvm-893af8c058aad683027c604d6cbe818c59e0eda8.tar.bz2 llvm-893af8c058aad683027c604d6cbe818c59e0eda8.tar.xz | |
Fix Bug: ConstProp/2003-05-12-DivideError.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6125 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/VMCore')
| -rw-r--r-- | lib/VMCore/ConstantFold.cpp | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp index 36cc13cf55..8da98f1997 100644 --- a/lib/VMCore/ConstantFold.cpp +++ b/lib/VMCore/ConstantFold.cpp @@ -461,9 +461,21 @@ struct DirectIntRules : public DirectRules<ConstantClass, BuiltinType, Ty, DirectIntRules<ConstantClass, BuiltinType, Ty> > { + static Constant *Div(const ConstantClass *V1, const ConstantClass *V2) { + if (V2->isNullValue()) return 0; + if (V2->isAllOnesValue() && // MIN_INT / -1 + (BuiltinType)V1->getValue() == -(BuiltinType)V1->getValue()) + return 0; + BuiltinType R = (BuiltinType)V1->getValue() / (BuiltinType)V2->getValue(); + return ConstantClass::get(*Ty, R); + } + static Constant *Rem(const ConstantClass *V1, const ConstantClass *V2) { - if (V2->isNullValue()) return 0; + if (V2->isNullValue()) return 0; // X / 0 + if (V2->isAllOnesValue() && // MIN_INT / -1 + (BuiltinType)V1->getValue() == -(BuiltinType)V1->getValue()) + return 0; BuiltinType R = (BuiltinType)V1->getValue() % (BuiltinType)V2->getValue(); return ConstantClass::get(*Ty, R); } |