[llvm] [PowerPC] using milicode call for strlen instead of lib call (PR #153600)

[zhijian lin via llvm-commits]

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@@ -1259,6 +1259,9 @@ class SelectionDAG {
   std::pair<SDValue, SDValue> getMemcmp(SDValue Chain, const SDLoc &dl,
                                         SDValue Dst, SDValue Src, SDValue Size,
                                         const CallInst *CI);
+  LLVM_ABI std::pair<SDValue, SDValue>
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diggerlin wrote:

I will create a NFC patch to add LLVM_ABI for getMemcmp() later.

https://github.com/llvm/llvm-project/pull/153600