}
Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2) {
+ // Check the operands for consistency first
+ assert((Opcode >= Instruction::BinaryOpsBegin &&
+ Opcode < Instruction::BinaryOpsEnd) &&
+ "Invalid opcode in binary constant expression");
+ assert(C1->getType() == C2->getType() &&
+ "Operand types in binary constant expression should match");
if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
return FC; // Fold a few common cases...
ConstantExpr *Result = ExprConstants.get(C1->getType(), Key);
if (Result) return Result;
- // Its not in the table so create a new one and put it in the table.
+ // It's not in the table so create a new one and put it in the table.
+ Result = new ConstantExpr(Opcode, C1, C2);
+ ExprConstants.add(C1->getType(), Key, Result);
+ return Result;
+}
+
+/// getShift - Return a shift left or shift right constant expr
+Constant *ConstantExpr::getShift(unsigned Opcode, Constant *C1, Constant *C2) {
// Check the operands for consistency first
- assert((Opcode >= Instruction::BinaryOpsBegin &&
- Opcode < Instruction::BinaryOpsEnd) &&
+ assert((Opcode == Instruction::Shl ||
+ Opcode == Instruction::Shr) &&
"Invalid opcode in binary constant expression");
+ assert(C1->getType()->isIntegral() && C2->getType() == Type::UByteTy &&
+ "Invalid operand types for Shift constant expr!");
- assert(C1->getType() == C2->getType() &&
- "Operand types in binary constant expression should match");
+ if (Constant *FC = ConstantFoldShiftInstruction(Opcode, C1, C2))
+ return FC; // Fold a few common cases...
+
+ // Look up the constant in the table first to ensure uniqueness
+ std::vector<Constant*> argVec(1, C1); argVec.push_back(C2);
+ const ExprMapKeyType &Key = std::make_pair(Opcode, argVec);
+ ConstantExpr *Result = ExprConstants.get(C1->getType(), Key);
+ if (Result) return Result;
+ // It's not in the table so create a new one and put it in the table.
Result = new ConstantExpr(Opcode, C1, C2);
ExprConstants.add(C1->getType(), Key, Result);
return Result;
}
+
Constant *ConstantExpr::getGetElementPtr(Constant *C,
const std::vector<Constant*> &IdxList){
if (Constant *FC = ConstantFoldGetElementPtr(C, IdxList))