[PATCH] D35635: [ARM] Optimize {s,u}{add,sub}.with.overflow

[Roger Ferrer Ibanez via Phabricator via llvm-commits]

rogfer01 added inline comments.


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Comment at: lib/Target/ARM/ARMISelLowering.cpp:4542-4543
+    // Reverse the condition code.
+    ARMCC::CondCodes CondCode =
+        (ARMCC::CondCodes)cast<const ConstantSDNode>(ARMcc)->getZExtValue();
+    CondCode = ARMCC::getOppositeCondition(CondCode);
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Apologies if this question looks a bit clueless about all the transformation, but why you need to reverse the condition code here?


https://reviews.llvm.org/D35635