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R600/SI: Custom lower i64 ISD::SELECT

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200774 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tom Stellard 2014-02-04 17:18:40 +00:00
parent 4ee42eaec9
commit 83918a2ad2
3 changed files with 40 additions and 0 deletions
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27
lib/Target/R600/SIISelLowering.cpp
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@ -104,6 +104,7 @@ SITargetLowering::SITargetLowering(TargetMachine &TM) :
setOperationAction(ISD::STORE, MVT::v2i32, Custom);
setOperationAction(ISD::STORE, MVT::v4i32, Custom);
setOperationAction(ISD::SELECT, MVT::i64, Custom);
setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
@ -463,6 +464,7 @@ SDValue SITargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
}
}
case ISD::SELECT: return LowerSELECT(Op, DAG);
case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
case ISD::SIGN_EXTEND: return LowerSIGN_EXTEND(Op, DAG);
case ISD::STORE: return LowerSTORE(Op, DAG);
@ -754,6 +756,31 @@ SDValue SITargetLowering::LowerSampleIntrinsic(unsigned Opcode,
Op.getOperand(4));
}
SDValue SITargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
if (Op.getValueType() != MVT::i64)
return SDValue();
SDLoc DL(Op);
SDValue Cond = Op.getOperand(0);
SDValue LHS = Op.getOperand(1);
SDValue RHS = Op.getOperand(2);
SDValue Zero = DAG.getConstant(0, MVT::i32);
SDValue One = DAG.getConstant(1, MVT::i32);
SDValue Lo0 = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, LHS, Zero);
SDValue Lo1 = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, RHS, Zero);
SDValue Lo = DAG.getSelect(DL, MVT::i32, Cond, Lo0, Lo1);
SDValue Hi0 = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, LHS, One);
SDValue Hi1 = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, RHS, One);
SDValue Hi = DAG.getSelect(DL, MVT::i32, Cond, Hi0, Hi1);
return DAG.getNode(ISD::BUILD_PAIR, DL, MVT::i64, Lo, Hi);
}
SDValue SITargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const {
SDValue LHS = Op.getOperand(0);
SDValue RHS = Op.getOperand(1);

1
lib/Target/R600/SIISelLowering.h
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@ -26,6 +26,7 @@ class SITargetLowering : public AMDGPUTargetLowering {
SDValue LowerSampleIntrinsic(unsigned Opcode, const SDValue &Op,
SelectionDAG &DAG) const;
SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSIGN_EXTEND(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const;

12
test/CodeGen/R600/select64.ll Normal file
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@ -0,0 +1,12 @@
; RUN: llc < %s -march=r600 -mcpu=SI -verify-machineinstrs | FileCheck %s
; CHECK-LABEL: @select0
; CHECK: V_CNDMASK
; CHECK: V_CNDMASK
define void @select0(i64 addrspace(1)* %out, i32 %cond, i64 %in) {
entry:
%0 = icmp ugt i32 %cond, 5
%1 = select i1 %0, i64 0, i64 %in
store i64 %1, i64 addrspace(1)* %out
ret void
}