[llvm] [SeparateConstOffsetFromGEP] Decompose constant xor operand if possible (PR #135788)

[Sumanth Gundapaneni via llvm-commits]

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@@ -1181,6 +1359,10 @@ bool SeparateConstOffsetFromGEP::run(Function &F) {
 
   DL = &F.getDataLayout();
   bool Changed = false;
+
+  // Decompose xor in to "or disjoint" if possible.
+  Changed |= decomposeXor(F);
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sgundapa wrote:

I will look at it.  I can change the main function walk, but it may it more complex. decomposeXor modifies the IR in such a way that the rest of the pass does its things.

https://github.com/llvm/llvm-project/pull/135788