[llvm] [X86][CodeGen] Support lowering for CCMP/CTEST (PR #91747)

[Phoebe Wang via llvm-commits]

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@@ -1600,10 +1609,20 @@ void X86DAGToDAGISel::PostprocessISelDAG() {
 #undef FROM_TO
 #undef CASE_ND
           // Need to swap the memory and register operand.
-          SDValue Ops[] = {And.getOperand(1), And.getOperand(2),
-                           And.getOperand(3), And.getOperand(4),
-                           And.getOperand(5), And.getOperand(0),
-                           And.getOperand(6) /* Chain */};
+          SmallVector<SDValue> Ops = {And.getOperand(1), And.getOperand(2),
+                                      And.getOperand(3), And.getOperand(4),
+                                      And.getOperand(5), And.getOperand(0)};
+          // CC, Cflags.
+          if (IsCTESTCC) {
+            Ops.push_back(N->getOperand(2));
+            Ops.push_back(N->getOperand(3));
+          }
+          // Chain
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phoebewang wrote:

Change to "Chain of the memory load"?

The `And` doesn't indicate it has a chain at the first glance.

https://github.com/llvm/llvm-project/pull/91747