[PATCH] D120435: [X86] Combine ADC(ADD(X,Y),0,Carry) -> ADC(X,Y,Carry)

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


================
Comment at: llvm/lib/Target/X86/X86ISelLowering.cpp:52156
+  if (LHS.getOpcode() == ISD::ADD && isNullConstant(RHS) &&
+      !N->hasAnyUseOfValue(1))
+    return DAG.getNode(X86ISD::ADC, SDLoc(N), N->getVTList(), LHS.getOperand(0),
----------------
xbolva00 wrote:
> OneUseCheck of Add?
> 
> @RKSimon
why?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D120435/new/

https://reviews.llvm.org/D120435