public Value BuildPhi(TypeRef type, string name, PhiIncoming incoming)
{
IntPtr[] valPointers = incoming.GetValuePointers();
IntPtr[] blockPointers = incoming.GetBlockPointers();
LLVMValueRef *phi = Native.BuildPhi(m_builder, type.Handle, name);
Native.AddIncoming(phi, valPointers, blockPointers, (uint)valPointers.Length);
return(new Value(phi));
}
public override Value CodeGen(IRBuilder builder)
{
Value condV = this.Cond.CodeGen(builder);
if(condV.IsNull) return condV;
condV = builder.BuildFCmp(condV, LLVMRealPredicate.RealONE,
Value.CreateConstDouble(0));
BasicBlock startBlock = builder.GetInsertPoint();
Function func = startBlock.GetParent();
BasicBlock thenBB = func.AppendBasicBlock("then");
builder.SetInsertPoint(thenBB);
Value thenV = this.Then.CodeGen(builder);
if(thenV.IsNull) return thenV;
/* Codegen of 'then' can change the current block, update then_bb for the
* phi. We create a new name because one is used for the phi node, and the
* other is used for the conditional branch. */
BasicBlock newThenBB = builder.GetInsertPoint();
// Emit else block
BasicBlock elseBB = func.AppendBasicBlock("else");
func.AppendBasicBlock(elseBB);
builder.SetInsertPoint(elseBB);
Value elseV = this.Else.CodeGen(builder);
if(elseV.IsNull) return elseV;
// Codegen of 'Else' can change the current block, update ElseBB for the PHI.
BasicBlock newElseBB = builder.GetInsertPoint();
// Emit merge block
BasicBlock mergeBB = func.AppendBasicBlock("ifcont");
func.AppendBasicBlock(mergeBB);
builder.SetInsertPoint(mergeBB);
PhiIncoming incoming = new PhiIncoming();
incoming.Add(thenV, thenBB);
incoming.Add(elseV, elseBB);
Value phi = builder.BuildPhi(TypeRef.CreateDouble(), "iftmp", incoming);
builder.SetInsertPoint(startBlock);
builder.BuildCondBr(condV, thenBB, elseBB);
builder.SetInsertPoint(thenBB);
builder.BuildBr(mergeBB);
builder.SetInsertPoint(elseBB);
builder.BuildBr(mergeBB);
builder.SetInsertPoint(mergeBB);
return phi;
}
public Value BuildPhi(TypeRef type, string name, PhiIncoming incoming)
{
IntPtr[] valPointers = incoming.GetValuePointers();
IntPtr[] blockPointers = incoming.GetBlockPointers();
LLVMValueRef* phi = Native.BuildPhi(m_builder, type.Handle, name);
Native.AddIncoming(phi, valPointers, blockPointers, (uint)valPointers.Length);
return new Value(phi);
}
