[llvm] [PowerPC] using milicode call for strcpy instead of lib call (PR #174782)

[Matt Arsenault via llvm-commits]

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@@ -9166,6 +9166,32 @@ SelectionDAG::getMemcmp(SDValue Chain, const SDLoc &dl, SDValue Mem0,
   return TLI->LowerCallTo(CLI);
 }
 
+std::pair<SDValue, SDValue> SelectionDAG::getStrcpy(SDValue Chain,
+                                                    const SDLoc &dl,
+                                                    SDValue Dst, SDValue Src,
+                                                    const CallInst *CI) {
+  const char *LibCallName = TLI->getLibcallName(RTLIB::STRCPY);
+  if (!LibCallName)
+    return {};
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arsenm wrote:

Don't check compatibility through the string name, use getLibcallImpl and check if it's LibcallImpl::Unsupported 

https://github.com/llvm/llvm-project/pull/174782