|
public BuildFSub ( |
||
| lhs | ||
| rhs | ||
| varName | string | |
| 리턴 | ||
public override Value CodeGen(IRBuilder builder)
{
Value l = this.LHS.CodeGen(builder);
Value r = this.RHS.CodeGen(builder);
if(l.IsNull || r.IsNull) return Value.Null;
switch(this.Op)
{
case '+':
return builder.BuildFAdd(l, r);
case '-':
return builder.BuildFSub(l, r);
case '*':
return builder.BuildFMul(l, r);
case '<':
// Convert bool 0/1 to double 0.0 or 1.0
return builder.BuildFCmpAndPromote(l, LLVMRealPredicate.RealULT,
r, TypeRef.CreateDouble());
}
// If it wasn't a builtin binary operator, it must be a user defined one. Emit
// a call to it.
Function f = CodeGenManager.Module.GetFunction("binary" + this.Op);
Debug.Assert(f != null);
Value[] ops = new Value[] { l, r };
return builder.BuildCall(f, ops, "binop");
}
public override Value CodeGen(IRBuilder builder)
{
Value l = this.LHS.CodeGen(builder);
Value r = this.RHS.CodeGen(builder);
if(l.IsNull || r.IsNull) return Value.Null;
switch(this.Op)
{
case '+':
return builder.BuildFAdd(l, r);
case '-':
return builder.BuildFSub(l, r);
case '*':
return builder.BuildFMul(l, r);
case '<':
// Convert bool 0/1 to double 0.0 or 1.0
return builder.BuildFCmpAndPromote(l, LLVMRealPredicate.RealULT, r, TypeRef.CreateDouble());
}
CodeGenManager.ErrorOutput.WriteLine("Unknown binary operator.");
return Value.Null;
}