diff options
author | tstellar <tstellar@91177308-0d34-0410-b5e6-96231b3b80d8> | 2012-09-24 15:52:45 +0000 |
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committer | tstellar <tstellar@91177308-0d34-0410-b5e6-96231b3b80d8> | 2012-09-24 15:52:45 +0000 |
commit | 0a04741273c801e192e3012eb385bad9bc10e5d2 (patch) | |
tree | 6f2f2e92c0d0814f2397ed4dfcb71d0db40fb8f7 /lib/Target/AMDGPU | |
parent | 1858cf7ae25b0a341635c4959255242688a21ce3 (diff) |
R600: Add optimization for FP_ROUND
git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/R600/@164534 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/AMDGPU')
-rw-r--r-- | lib/Target/AMDGPU/R600ISelLowering.cpp | 26 | ||||
-rw-r--r-- | lib/Target/AMDGPU/R600ISelLowering.h | 1 |
2 files changed, 27 insertions, 0 deletions
diff --git a/lib/Target/AMDGPU/R600ISelLowering.cpp b/lib/Target/AMDGPU/R600ISelLowering.cpp index 794b12ef160..029c7d0f544 100644 --- a/lib/Target/AMDGPU/R600ISelLowering.cpp +++ b/lib/Target/AMDGPU/R600ISelLowering.cpp @@ -50,6 +50,9 @@ R600TargetLowering::R600TargetLowering(TargetMachine &TM) : setOperationAction(ISD::SETCC, MVT::i32, Custom); setOperationAction(ISD::SETCC, MVT::f32, Custom); setOperationAction(ISD::FP_TO_UINT, MVT::i1, Custom); + + setTargetDAGCombine(ISD::FP_ROUND); + setSchedulingPreference(Sched::VLIW); } @@ -604,3 +607,26 @@ SDValue R600TargetLowering::LowerFormalArguments( } return Chain; } + +//===----------------------------------------------------------------------===// +// Custom DAG Optimizations +//===----------------------------------------------------------------------===// + +SDValue R600TargetLowering::PerformDAGCombine(SDNode *N, + DAGCombinerInfo &DCI) const +{ + SelectionDAG &DAG = DCI.DAG; + + switch (N->getOpcode()) { + // (f32 fp_round (f64 uint_to_fp a)) -> (f32 uint_to_fp a) + case ISD::FP_ROUND: { + SDValue Arg = N->getOperand(0); + if (Arg.getOpcode() == ISD::UINT_TO_FP && Arg.getValueType() == MVT::f64) { + return DAG.getNode(ISD::UINT_TO_FP, N->getDebugLoc(), N->getValueType(0), + Arg.getOperand(0)); + } + break; + } + } + return SDValue(); +} diff --git a/lib/Target/AMDGPU/R600ISelLowering.h b/lib/Target/AMDGPU/R600ISelLowering.h index f2999a30aca..017c6dba7a7 100644 --- a/lib/Target/AMDGPU/R600ISelLowering.h +++ b/lib/Target/AMDGPU/R600ISelLowering.h @@ -27,6 +27,7 @@ public: virtual MachineBasicBlock * EmitInstrWithCustomInserter(MachineInstr *MI, MachineBasicBlock * BB) const; virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const; + virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const; void ReplaceNodeResults(SDNode * N, SmallVectorImpl<SDValue> &Results, SelectionDAG &DAG) const; |