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** CORRECTLY, conservatively handle constant expressions

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5924 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-04-25 02:52:06 +00:00
parent eca8e8f111
commit 6cf4cb90a0
1 changed files with 7 additions and 2 deletions
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9
lib/VMCore/ConstantFold.cpp
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@ -47,7 +47,7 @@ Constant *ConstantFoldInstruction(Instruction *I) {
switch (I->getOpcode()) {
case Instruction::Cast:
return ConstRules::get(*Op0)->castTo(Op0, I->getType());
return ConstRules::get(*Op0, *Op0)->castTo(Op0, I->getType());
case Instruction::Add: return *Op0 + *Op1;
case Instruction::Sub: return *Op0 - *Op1;
case Instruction::Mul: return *Op0 * *Op1;
@ -107,7 +107,7 @@ Constant *ConstantFoldCastInstruction(const Constant *V, const Type *DestTy) {
}
}
return ConstRules::get(*V)->castTo(V, DestTy);
return ConstRules::get(*V, *V)->castTo(V, DestTy);
}
Constant *ConstantFoldBinaryInstruction(unsigned Opcode, const Constant *V1,
@ -555,3 +555,8 @@ Annotation *ConstRules::find(AnnotationID AID, const Annotable *TyA, void *) {
return new EmptyRules();
}
}
ConstRules *ConstRules::getConstantExprRules() {
static EmptyRules CERules;
return &CERules;
}