[PATCH] D34300: [AMDGPU] simplify add x, *ext (setcc) => addc|subb x, 0, setcc

Stanislav Mekhanoshin via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Tue Jun 20 12:39:33 PDT 2017


rampitec added inline comments.


================
Comment at: lib/Target/AMDGPU/SIISelLowering.cpp:473
   }
 
+  setTargetDAGCombine(ISD::ADD);
----------------
arsenm wrote:
> ADDCARRY/SUBCARRY should be marked as legal so more combines work on them
Done, but I do not see any visible difference.


Repository:
  rL LLVM

https://reviews.llvm.org/D34300





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