diff options
Diffstat (limited to 'llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp')
| -rw-r--r-- | llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp b/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp index 74df8de..fd19b74 100644 --- a/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp +++ b/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp @@ -125,6 +125,8 @@ private: bool selectConstVector(Register ResVReg, const SPIRVType *ResType, MachineInstr &I) const; + bool selectSplatVector(Register ResVReg, const SPIRVType *ResType, + MachineInstr &I) const; bool selectCmp(Register ResVReg, const SPIRVType *ResType, unsigned comparisonOpcode, MachineInstr &I) const; @@ -313,6 +315,8 @@ bool SPIRVInstructionSelector::spvSelect(Register ResVReg, case TargetOpcode::G_BUILD_VECTOR: return selectConstVector(ResVReg, ResType, I); + case TargetOpcode::G_SPLAT_VECTOR: + return selectSplatVector(ResVReg, ResType, I); case TargetOpcode::G_SHUFFLE_VECTOR: { MachineBasicBlock &BB = *I.getParent(); @@ -1185,6 +1189,43 @@ bool SPIRVInstructionSelector::selectConstVector(Register ResVReg, return MIB.constrainAllUses(TII, TRI, RBI); } +bool SPIRVInstructionSelector::selectSplatVector(Register ResVReg, + const SPIRVType *ResType, + MachineInstr &I) const { + if (ResType->getOpcode() != SPIRV::OpTypeVector) + report_fatal_error("Cannot select G_SPLAT_VECTOR with a non-vector result"); + unsigned N = GR.getScalarOrVectorComponentCount(ResType); + unsigned OpIdx = I.getNumExplicitDefs(); + if (!I.getOperand(OpIdx).isReg()) + report_fatal_error("Unexpected argument in G_SPLAT_VECTOR"); + + // check if we may construct a constant vector + Register OpReg = I.getOperand(OpIdx).getReg(); + bool IsConst = false; + if (SPIRVType *OpDef = MRI->getVRegDef(OpReg)) { + if (OpDef->getOpcode() == SPIRV::ASSIGN_TYPE && + OpDef->getOperand(1).isReg()) { + if (SPIRVType *RefDef = MRI->getVRegDef(OpDef->getOperand(1).getReg())) + OpDef = RefDef; + } + IsConst = OpDef->getOpcode() == TargetOpcode::G_CONSTANT || + OpDef->getOpcode() == TargetOpcode::G_FCONSTANT; + } + + if (!IsConst && N < 2) + report_fatal_error( + "There must be at least two constituent operands in a vector"); + + auto MIB = BuildMI(*I.getParent(), I, I.getDebugLoc(), + TII.get(IsConst ? SPIRV::OpConstantComposite + : SPIRV::OpCompositeConstruct)) + .addDef(ResVReg) + .addUse(GR.getSPIRVTypeID(ResType)); + for (unsigned i = 0; i < N; ++i) + MIB.addUse(OpReg); + return MIB.constrainAllUses(TII, TRI, RBI); +} + bool SPIRVInstructionSelector::selectCmp(Register ResVReg, const SPIRVType *ResType, unsigned CmpOpc, |