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

[Shengchen Kan via llvm-commits]

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@@ -1588,8 +1596,9 @@ void X86DAGToDAGISel::PostprocessISelDAG() {
           if (And->hasAnyUseOfValue(1))
             continue;
           unsigned NewOpc;
+          unsigned NumOps = N->getNumOperands();
 #define FROM_TO(A, B)                                                          \
-  CASE_ND(A) NewOpc = X86::B;                                                  \
+  CASE_ND(A) NewOpc = NumOps > 2 ? X86::C##B : X86::B;                         \
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KanRobert wrote:

We can't. The `FROM` is the operand of TEST/CTEST and is same for them. Adding `FROM_TO` for `CTEST*` would make `case FROM` duplicated.

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