diff options
Diffstat (limited to 'llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp index f8f39be96d6..08ea4d90f12 100644 --- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp +++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp @@ -948,7 +948,31 @@ LegalizerHelper::widenScalar(MachineInstr &MI, unsigned TypeIdx, LLT WideTy) { Observer.changedInstr(MI); return Legalized; } + case TargetOpcode::G_BSWAP: { + Observer.changingInstr(MI); + unsigned DstReg = MI.getOperand(0).getReg(); + + unsigned ShrReg = MRI.createGenericVirtualRegister(WideTy); + unsigned DstExt = MRI.createGenericVirtualRegister(WideTy); + unsigned ShiftAmtReg = MRI.createGenericVirtualRegister(WideTy); + widenScalarSrc(MI, WideTy, 1, TargetOpcode::G_ANYEXT); + + MI.getOperand(0).setReg(DstExt); + MIRBuilder.setInsertPt(MIRBuilder.getMBB(), ++MIRBuilder.getInsertPt()); + + LLT Ty = MRI.getType(DstReg); + unsigned DiffBits = WideTy.getScalarSizeInBits() - Ty.getScalarSizeInBits(); + MIRBuilder.buildConstant(ShiftAmtReg, DiffBits); + MIRBuilder.buildInstr(TargetOpcode::G_LSHR) + .addDef(ShrReg) + .addUse(DstExt) + .addUse(ShiftAmtReg); + + MIRBuilder.buildTrunc(DstReg, ShrReg); + Observer.changedInstr(MI); + return Legalized; + } case TargetOpcode::G_ADD: case TargetOpcode::G_AND: case TargetOpcode::G_MUL: @@ -1879,6 +1903,7 @@ LegalizerHelper::fewerElementsVector(MachineInstr &MI, unsigned TypeIdx, case G_FCOS: case G_FSIN: case G_FSQRT: + case G_BSWAP: return fewerElementsVectorBasic(MI, TypeIdx, NarrowTy); case G_ZEXT: case G_SEXT: |
