================
@@ -1762,6 +1765,36 @@ bool SPIRVInstructionSelector::selectSign(Register
ResVReg,
return Result;
}
+bool SPIRVInstructionSelector::selectWaveActiveCountBits(
+ Register ResVReg, const SPIRVType *ResType, MachineInstr &I) const {
+ assert(I.getNumOperands() == 3);
+ assert(I.getOperand(2).isReg());
+ MachineBasicBlock &BB = *I.getParent();
+
+ Register BallotReg = MRI->createVirtualRegister(&SPIRV::IDRegClass);
+ SPIRVType *IntTy = GR.getOrCreateSPIRVIntegerType(32, I, TII);
+ SPIRVType *BallotType = GR.getOrCreateSPIRVVectorType(IntTy, 4, I, TII);
+
+ bool Result =
+ BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpGroupNonUniformBallot))
+ .addDef(BallotReg)
+ .addUse(GR.getSPIRVTypeID(BallotType))
+ .addUse(GR.getOrCreateConstInt(SPIRV::Scope::Subgroup, I, IntTy,
TII))
+ .addUse(I.getOperand(2).getReg());
----------------
pow2clk wrote:
You're missing a `constrainAllUses` call on the end here. `AddUse` returns a
reference to `MachineInstrBuilder`, which I'm not really sure how gets
converted to a bool, but I don't want to rely on it.
https://github.com/llvm/llvm-project/pull/113382
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