[llvm] [RISCV][SDAG] Prefer ShortForwardBranch to lower sdiv by pow2 (PR #67364)

[David Green via llvm-commits]

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@@ -16102,33 +16102,7 @@ AArch64TargetLowering::BuildSDIVPow2(SDNode *N, const APInt &Divisor,
       !(Divisor.isPowerOf2() || Divisor.isNegatedPowerOf2()))
     return SDValue();
 
-  SDLoc DL(N);
-  SDValue N0 = N->getOperand(0);
-  unsigned Lg2 = Divisor.countr_zero();
-  SDValue Zero = DAG.getConstant(0, DL, VT);
-  SDValue Pow2MinusOne = DAG.getConstant((1ULL << Lg2) - 1, DL, VT);
-
-  // Add (N0 < 0) ? Pow2 - 1 : 0;
-  SDValue CCVal;
-  SDValue Cmp = getAArch64Cmp(N0, Zero, ISD::SETLT, CCVal, DAG, DL);
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davemgreen wrote:

Sorry for the delay, I didn't see this. I think it sounds fine so long as it is usually expected to optimize to the same thing.

https://github.com/llvm/llvm-project/pull/67364