[llvm] [GlobalISel] Implement parity reasoning via G_CTPOP (PR #199078)

[Pawan Nirpal via llvm-commits]

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@@ -2173,15 +2173,12 @@ unsigned GISelValueTracking::computeNumSignBits(Register R,
       FirstAnswer = MRI.getType(R).getScalarSizeInBits();
       break;
     }
-
-    Register Src1 = MI.getOperand(1).getReg();
     unsigned Src1NumSignBits =
-        computeNumSignBits(Src1, DemandedElts, Depth + 1);
+        computeNumSignBits(Op0, DemandedElts, Depth + 1);
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pawan-nirpal-031 wrote:

clang-format. 

https://github.com/llvm/llvm-project/pull/199078